Therapy Dogs Reduce Pain in ER Patients

By Pat Anson, PNN Editor

Pet therapy has long been used in a variety of medical settings to help patients feel better – from nursing homes and hospice care to pediatric wards and cancer centers. And now, for the first time, there’s evidence that therapy dogs can significantly reduce pain, anxiety and depression in emergency department patients.

A Canadian research team at the University of Saskatchewan randomly selected nearly 200 ED patients who were waiting to be treated or admitted at Saskatoon's Royal University Hospital. Half of the participants spent 10 minutes with a therapy dog and its handler, while the other half received standard care without a dog visit.

The study findings, recently published in PLOS ONE,  showed that nearly half the patients visited by a therapy dog reported a decrease in pain (43%), with similar improvements in anxiety (48%), depression (46%) and overall well-being (41%). The dog visits had no significant effect on heart rate or blood pressure.

“Clinically significant changes in pain as well as significant changes in anxiety, depression and well-being were observed in the therapy dog intervention compared to control. The findings of this novel study contribute important knowledge towards the potential value of ED therapy dogs to affect patients’ experience of pain, and related measures of anxiety, depression and well-being,” wrote lead author Colleen Dell, PhD, a sociology professor at the University of Saskatchewan.

Pain is the most common reason that someone visits an emergency department, so the finding that therapy dogs can decrease pain levels is notable – particularly because most patients in the study (77%) did not receive any pain medication.

Many people with pain dread the idea of going to an emergency room, fearing that their pain won’t be treated properly. In a PNN survey of nearly 1,300 acute and chronic pain patients, over 80% said hospital staff are not adequately trained in pain management and over half rated the quality of their pain care in hospitals as poor or very poor. Nearly eight out of ten patients felt they were labelled as an addict or drug seeker by hospital staff.

Dell and her colleagues are well aware of the stress a pain patient can experience when visiting an emergency department, particularly in an era when the use of opioid medication is discouraged. Long waits, bright lighting and high noise levels may also make it difficult for ED patients to relax. They think therapy dogs could be useful in improving the patient experience.

“With adequate access to pharmaceutical pain management a concern for ED patients, as well as long wait times, it will be important to explore creative, non-pharmaceutical options,” said Dell. “Patient waiting has also been associated with negative emotional states and well-being in ED patients. Negative feelings, particularly anxiety and stress, can be intensified when patients encounter uncertainty regarding their pain.

“The role of therapy dog visits in decreasing patients’ perceived pain, whether as a distraction or by some other mode, is an important finding that should be examined further in both practice and research.”      

The benefits of having a pet are well known to most pet owners. A 2019 survey of over 2,000 older Americans found that pets helped them enjoy life, made them feel loved, kept them physically active and reduced stress. Pet ownership was particularly helpful to those who rated their health as fair or poor. More than 70 percent of those older adults said pets help them cope with physical or emotional problems, and nearly half (46%) said their pets help distract them from pain.

Drug Derived from Ticks Could Take Bite Out of Pain

By Pat Anson, PNN Editor

If you’ve experienced Lyme disease, probably the last place you’d look for pain relief is ticks. The insects are notorious for spreading Lyme, a bacterial illness that causes chronic fatigue, muscle and joint pain, cognitive issues and other symptoms that can last for years.  

But UK researchers say a protein found in tick saliva – called Votucalis – shows potential as a treatment for chronic pain. In experiments on laboratory animals, Votucalis provided pain and itch relief to mice subjected to neuropathic pain. Their findings were recently published in the journal Frontiers in Pharmacology.

“It is amazing that a protein found in the saliva of this tiny creature could prevent chronic pain and itching in people,” says co-author Ilona Obara, PhD, Director of Research in the School of Pharmacy at Newcastle University. “These are conditions that bring a huge amount of misery, and current medication displays limited efficacy, and can also often be detrimental to patients.

“Votucalis has already been tested in humans with other conditions, including conjunctivitis, without major side-effects, so the potential for this to be developed into a drug to tackle chronic pain and itching is definitely there.”

Obara began her research at Durham University with co-author Paul Chazot, PhD. Their research focused on tick saliva because it has pain relieving, anti-inflammatory and anti-coagulant effects on mammals. Ticks are parasitic blood feeders that rely on their “hosts” to be unaware that they have uninvited dinner guests.

Researchers found that Votucalis is particularly good at binding to histamine and preventing it from activating histamine cell receptors, resulting in reduced itching and pain sensations when a host animal is bitten.

“Our study is the first to show evidence of the anti-itch and pain relief potential of Votucalis, which is very exciting. We could be on the brink of discovering a viable alternative to opioid and gabapentinoid drugs,” said Chazot, an Associate Professor in the Department of Biosciences at Durham University.

The next step is to develop a drug delivery system to effectively administer Votucalis at the site of itch and pain. The research is being funded by the government of Saudi Arabia – where ticks are emerging as a public health problem -- and Akari Therapeutics, a pharmaceutical company that hopes to turn Votucalis into a treatment for neuropathic and inflammatory pain.

Unlike opioids, Votucalis does not enter the brain, which means it is not addictive and less likely to cause side effects.

“We are delighted to be working with Drs. Chazot and Obara on the pipeline drug Votucalis. The exciting new data in pain and itch supports the potential that the unique mode of action of Votucalis, inhibiting all four histamine receptors, opens exciting therapeutic opportunities in pain management and dermatology," Clive Richardson, CEO of Akari Therapeutics, said in a statement.

Akari is developing another drug derived from ticks – called nomacopan – for the treatment of a rare skin disease and ophthalmic conditions in the eye.  

Strict Low-Calorie Diet Reduces Fibromyalgia Symptoms

By Pat Anson, PNN Editor

Fibromyalgia patients with obesity experienced a significant reduction in pain and other symptoms after three weeks on a strict low-calorie diet, according to a new study that suggests limiting calories – not just weight loss – can have an analgesic effect.

Researchers enrolled nearly 200 patients diagnosed with fibromyalgia who were participating in a weight management program at the University of Michigan Health System. Participants had an average body mass index (BMI) of 41, which is considered severe obesity.

For 12 weeks, they were put on a very low energy diet (VLED) that limits bread, rice, potatoes and other foods that are high in carbohydrates. VLED is designed to shift the body away from using glucose in sweet or starchy foods to burning its own body fat for energy. Study participants were limited to just 800 calories a day, less than half the amount recommended for adult women and only a third of the amount recommended for men.

After just three weeks on the restricted diet, nearly three out of four participants (72%) experienced symptom reductions of 30% or more, regardless of the amount of weight lost. Patients who showed little or no improvement had a higher BMI at the start of the study and were more likely to have had a diagnosis of depression.

“Our results show, for the first time, that individuals following aggressive calorie restriction, ie, a VLED, had rapid and significant improvements in pain distribution and common pain-related comorbid symptoms and, importantly, prior to the achievement of significant weight loss,” researchers reported in the journal ACR Open Rheumatology.

“Furthermore, improvement at week 3 was strongly associated with improvement over the entire 12-week course of VLED, suggesting that patients who respond are likely to show these effects early in the process. These findings provide preliminary support for the hypothesis that calorie restriction, per se, can reduce pain and comorbid symptoms in individuals with obesity.”

Fibromyalgia is a poorly understood disorder characterized by widespread body pain, fatigue, poor sleep and depression. The FDA has approved three drugs to treat fibromyalgia -- duloxetine (Cymbalta), milnacipran (Savella) and pregabalin (Lyrica) -- but many patients say the drugs are ineffective and often have side effects.  

Previous studies have suggested that weight loss can help lower pain levels, but the improvement was thought to be caused by reduced stress on knees, hips and lower back – parts of the body that are weight-bearing.  

The new study suggests that a strict diet alone can significantly reduce fibromyalgia pain without major weight loss, but researchers caution that more studies are needed to fully understand the biological processes at work.

“The implications of this study suggest an early association between caloric restriction, through a VLED, and fibromyalgia symptoms. Although a larger study with a control group would be the next step in investigating this association, this provides important information for clinicians who counsel patients on alternatives to pharmacologic treatments for pain and other somatic symptoms,” researchers concluded.     

Many previous studies have shown that a low calorie diet can help reduce pain levels. A 2018 study at the University of Michigan found that obese patients on a low-calorie liquid diet for 12 weeks not only had lower pain levels in their knees and hips, but also in unexpected areas such as the abdomen, arm, chest and jaw. Study participants who lost 10% of their weight also reported better mental health, improved cognition and more energy.

Mindfulness Program Reduced Chronic Pain and Opioid Use

By Pat Anson, PNN Editor

A mindfulness therapy program reduced chronic pain and emotional distress in patients on long-term opioid therapy, in what’s being touted as the first randomized clinical trial to demonstrate the effectiveness of psychotherapy in reducing pain and opioid use simultaneously.

Researchers at the University of Utah enrolled 250 patients being treated for chronic pain at primary care clinics in the Salt Lake Valley. Most participants took oxycodone or hydrocodone, reported two or more painful conditions, and met the clinical criteria for major depression. Over two-thirds had also been diagnosed with opioid use disorder.

Study participants were randomly assigned to either a standard psychotherapy support group or a mindfulness program called Mindfulness-Oriented Recovery Enhancement (MORE). Both groups met for 8 weekly two-hour sessions. Patients in the MORE group were trained to meditate on their breathing and body sensations, and to practice 3 minutes of mindfulness before taking opioid medication -- focusing on whether their opioid use was due to drug craving or the need for pain relief.

The study findings, published in JAMA Internal Medicine, showed sustained and significant reductions in pain symptoms, depression and opioid use in the MORE group nine months after treatment ended. Researchers say 45% of MORE participants were no longer misusing opioids (compared to 24% in the support group) and 36% had cut their opioid use in half.

“MORE demonstrated one of the most powerful treatment effects I’ve seen,” lead author Eric Garland, PhD, director of the Center on Mindfulness and Integrative Health Intervention Development at the University of Utah, said in a press release. “There’s nothing else out there that works this well in alleviating pain and curbing opioid misuse.”

Garland believes the sustained benefits of MORE might be related to the program’s ability to restructure the way the brain processes rewards, helping patients shift from valuing the physical and psychological effects of drugs to valuing natural, healthy rewards like a beautiful sunset or the smile on the face of a loved one. 

“Remarkably, the effects of MORE seem to get stronger over time,” said Garland, who has been studying mindfulness for over a decade. “One possible explanation is that these individuals are integrating the skills they’ve learned through MORE into their everyday lives.”  

MORE participants are taught to reevaluate the experience of pain and opioid craving, “zooming in” on what they are feeling and breaking it down into different sensations like heat, tightness or tingling. They learn how those experiences change over time, and to adopt the perspective of an observer.

“Rather than getting caught up in the pain or craving, we teach people how to step back and observe that experience from the perspective of an objective witness,” Garland explained. “When they can do that, people begin to recognize that who they truly are is bigger than any one thought or sensation. They are not defined by their experiences of pain or craving; their true nature is something more.”

Garland said the findings are particularly noteworthy because many participants had multiple chronic pain conditions, were on high-opioid doses and also had psychiatric disorders. The average pain duration of participants at the start of the study was nearly 15 years and their average pain score was 5.5 on a 1 to 10 pain scale.

Natural Herbs for Intractable Pain Syndrome

By Dr. Forest Tennant, PNN Columnist 

Intractable Pain Syndrome (IPS) is defined as constant pain with cardiovascular, metabolic and hormonal complications. IPS is caused by neuroinflammation inside the brain and spinal cord (central nervous system or CNS) that comes from excess electromagnetic energy generated by a painful disease or injury.

Excess electromagnetic energy activates an immune cell in the CNS called “microglia” to produce inflammation that then destroys tissue in the CNS. Unfortunately, tissue destroyed by inflammation impairs or damages the normal CNS mechanisms that shut off or cause pain to cease. A person may, therefore, develop constant (24/7) pain that overstresses the cardiovascular, metabolic and hormonal systems.

Tissue destruction in the CNS is well documented by brain scans. This relatively recent understanding of how neuroinflammation destroys CNS tissues and causes constant pain is arguably the most important discovery for pain treatment in the 21st Century. Why? We now have some ideas on how to treat IPS that can possibly cure or at least permanently reduce pain rather than just provide temporary, symptomatic relief. 

Treating CNS Inflammation 

When someone develops IPS, it is human nature to seek immediate pain relief and ignore its basic cause. If you have constant (24/7) pain, however, one must accept the fact that you have inflammation in the CNS that must be suppressed. Otherwise, you can reasonably assume that the pain will get worse.  

While research has documented that CNS inflammation may spread, it is unknown whether it ever “burns out.” As of yet, there is no blood or x-ray test to know if “burn out” may occur. This means that every person with IPS must take one or more anti-inflammatory agents to stop further tissue destruction and the worsening of pain. 

A problem when suppressing inflammation in the CNS is that only a few of the anti-inflammatory agents which are commercially available cross the blood brain barrier and enter the spinal fluid in sufficient amounts to be effective. This includes the non-specific anti-inflammatory drugs (NSAIDs) and corticosteroids.  

Benefits of Natural Herbal Products

Interestingly, natural products such as botanicals, herbs, enzymes and hormones tend to cross the blood brain barrier and provide anti-inflammatory activity. A well-known common example is aspirin (acetylsalicylic acid), which is derived from willow tree bark.

This has caused a great deal of interest in the use of natural products for suppression of CNS inflammation. Several research studies in both laboratory tests and animals have found that some natural agents do indeed suppress CNS inflammation.

To date, research has identified five herbs that suppress CNS inflammation. There are likely other natural products that suppress CNS inflammation, but this list is a good start:

1. Ginseng

2. Curcumin

3. Resveratrol

4. Ginger

5. Fisetin

Currently, there are very few controlled blind studies in humans to demonstrate the effectiveness of these herbal products. Personally, I have often seen considerable effectiveness of natural products in reducing the pain of IPS. Other anecdotal reports from patients and doctors are also starting to accumulate.

Precise dosages are unknown, but the manufacturer of each herbal product will have some starting instructions on the label. Herbal agents appear quite safe and have few reported side effects. Herbs can be taken with corticosteroids, opioids, naltrexone, electrical stimulators, neuropathic agents, and essentially all medication used for treatment of IPS.

At this time, we believe there is enough research and clinical experience to recommend both herbal, non-prescription as well as prescription anti-inflammatory agents to assist treatment of IPS. The time has come to treat IPS with a broader-based approach rather than just the use of symptomatic pain relievers.

Based on our current knowledge, IPS will likely get worse unless a person’s treatment program includes agents that suppress CNS inflammation.

Forest Tennant, MD, DrPH, MPH is retired from clinical practice but continues his research on the treatment of arachnoiditis and intractable pain at the Arachnoiditis Research and Education Project. The Tennant Foundation gives financial support to Pain News Network and sponsors PNN’s Patient Resources section.  

FDA Urged to Regulate Poppy Seeds

By Pat Anson, PNN Editor

A consumer advocacy group is once again calling on the Food and Drug Administration to establish and enforce regulations that limit opiate contamination of poppy seeds.

Over a year ago, the Center for Science in the Public Interest (CPSI) petitioned the FDA to set a safe threshold for opiate alkaloids in imported poppy seeds, most of which come from Afghanistan. The tiny black seeds can become contaminated with trace amounts of codeine, morphine and other opiates when they are harvested from opium poppies.

Washed poppy seeds are often found in baked goods, but drug users have found they can use unwashed seeds to make a potent homemade tea. PNN has reported that some pain sufferers use the tea as an analgesic, although the bitter brew is mostly consumed by people who simply want to get high.     

In its petition, CSPI cited a study estimating that 19 people in the U.S. suffered fatal overdoses involving poppy seeds in recent years.

In a letter recently sent to the FDA Center for Food Safety and Applied Nutrition, CSPI renewed its call for the agency to take action to prevent more deaths.

“The time is overdue for the FDA to establish standards that will protect U.S. consumers from ingesting dangerous levels of opiates through the food supply,” wrote Peter Lurie, MD, President of CSPI wrote.  

The European Food Safety Authority established maximum levels of morphine and codeine in poppy seeds last year, which are scheduled to take effect in July.

In 2019, the U.S. Drug Enforcement Administration classified unwashed poppy seeds as a Schedule II controlled substance and closed a loophole that allowed them to be sold legally in the U.S.  

Enforcement actions since then have been scant. In October 2021, federal regulators filed a civil forfeiture action against an Oklahoma bakery to halt the sale of unwashed seeds. But within a few weeks the company was selling them again on its website, with a disclaimer saying the seeds “may contain trace amounts of opiate alkaloid residue” and should be thoroughly washed before consuming.

To date, the only action the FDA has taken on the CSPI petition was to post a notice in the Federal Register asking for public comment on the need for poppy seed regulation. Over 3,000 people responded, most of them supporting the petition. Asked to comment on the CSPI’s new letter, an FDA spokesperson said the issue remains under review.

“As part of our review of CSPI’s petition, we are considering the points raised in the petition and the over 3,200 comments submitted to the docket. The FDA has been engaging with other federal partners in this effort to help protect the public’s health,” the spokesperson told PNN in an email. 

To be clear, consuming unwashed poppy seeds is risky. Home brewers usually have no way of knowing where the seeds came from or how heavily they are contaminated with opiates. The Internet is filled with cautionary stories from illicit drug users who nearly overdosed or became addicted to the tea and went into withdrawal when they tried to taper.

“I woke up yesterday with a migraine (that’s typical when I quit) and by the afternoon the withdrawals had started: sweating, anxious, can’t get comfortable, want to crawl out of my skin,” a person recently posted on Reddit. “I want to get off this merry go round. I feel like my brain is totally normal except that little piece that is constantly scheming where my next opiates are coming from. They don’t even make me high, they just make me feel ‘normal’, so what’s the point? I want to be free of this.”

For people in pain, there’s an added risk to poppy seeds. A recent study found that consuming just few seeds in a muffin or bagel could result in a positive drug test – a finding that could get a patient taken off opioids or dismissed by their doctor.

Only 1 in 7 Chronic Pain Patients Use Opioids

By Pat Anson, PNN Editor

Have you tried physical therapy? What about yoga or Tai Chi? Did massage help you feel better?

Just about everyone in chronic pain has been asked that by family members, friends, doctors and sometimes even complete strangers.  The questions are innocent enough and usually well-meaning, but they often imply that a pain sufferer hasn’t looked beyond opioids for pain relief.

A new study shows that most people with chronic pain make extensive use of non-opioids and other “alternative” pain treatments – and that it’s relatively rare for a patient to only use opioids for pain relief.

The findings, published in JAMA Network Open, are based on answers to the 2019 National Health Survey by nearly 32,000 U.S. adults with chronic pain. The 2019 survey was the first to ask people about their use of 11 pain management techniques during the previous three months.

It turns out most people with chronic pain (54.7%) only used non-opioid pain management. And nearly a third (30.2%) used no pain therapy whatsoever. The rest either used opioids alone (4.4%) or a combination of opioids with one or more alternative treatments (10.7%).

That means only about 1 in every 7 adults with chronic pain even use opioids – a startling number when you consider the constant harping from anti-opioid activists and public health officials about how opioids are “overprescribed” in the U.S.   

“This study found that adults with chronic pain in the US use a variety of pain management techniques, including opioids,” wrote lead author Cornelius Groenewald, MB, a pediatric anesthesiologist and associate professor at the University of Washington School of Medicine. “Nonpharmacologic and nonopioid pharmacologic therapies are preferred treatments for chronic pain, and it is encouraging to note that most adults with chronic pain use a combination of various nonopioid modalities for treatment.”

Alternative Chronic Pain Therapies Used in 2019

• 18.8% Physical Therapy

• 17.6% Massage

• 15.6% Meditation or Relaxation Techniques

• 11.6% Spinal Manipulation or Chiropractic Care

• 8.5% Yoga or Tai Chi

• 5.1% Pain Self-Management Workshops

•  3.8% Psychological or CBT Therapy

• 1.8% Peer Support Group      

Nearly 40% of chronic pain sufferers reported using other therapies that were not listed in the survey. That may include treatments such as cannabis, kratom, medical devices, acupuncture or even ice packs. It would be good to include more of those options in future surveys.

Groenewald and his colleagues were disappointed that so few people used psychological techniques such as cognitive behavioral therapy (CBT), which was the only alternative pain therapy that they said was “underused.”   

The researchers found that complementary, psychological or psychotherapeutic therapies were more likely to be used by younger adults, females and people with more education. Adults using physical, occupational or rehabilitative therapies were more likely to be older, female, highly educated and have medical insurance.

Neuromodulation Device Effective for Most Migraine Sufferers

By Pat Anson, PNN Editor

A wearable neuromodulation device significantly reduced headache pain in nearly two-thirds of migraine sufferers, according to a new study. About one in four participants (22.6%) who used the device had no migraine pain after two hours.

The study findings, published in the journal Frontiers in Pain Research, are based on an analysis of over 23,000 remote electrical neuromodulation (REN) treatments with Nerivio, a device worn on the upper arm that uses mild electrical pulses to disrupt pain signals.

It’s important to note the study was designed and funded by Theranica Bio-Electronics, Nerivio’s manufacturer. Three of the five co-authors are Theranica employees.

“The current analysis of a very large group of patients, over a long period of time and multiple treatments, reinforces that REN provides a safe, efficacious and stable treatment option for acute treatment of migraine, both as a standalone and as an adjunct therapy. This is a very important component in the migraine therapy toolbox," lead author Jessica Ailani, MD, Director of the MedStar Georgetown Headache Center and Professor of Clinical Neurology, said in a press release.

Nerivio is controlled by a smartphone app that allows patients to set the intensity of their 45-minute treatments at the onset of a migraine. The app also has a migraine diary that allows patients and their doctors to track the effectiveness of REN.

It is from this app that study data was collected from 12,151 U.S. patients from 2019 to 2021. Most had been prescribed REN by headache specialists, indicating their migraines were difficult to treat with pain medication alone. During the study, about two-thirds of patients only used REN, with the remainder continuing to use over-the-counter or prescription medications.

"To the best of our knowledge, this study is the largest prospective real-world evidence analysis of a migraine device to date," said Alon Ironi, CEO of Theranica.

Migraine affects more than 37 million people in the United States, according to the American Migraine Foundation. In addition to headache pain, migraine can cause nausea, visual disturbances, and sensitivity to light and sound. Women are three times more likely to suffer from migraines than men.

Although migraine sufferers have many new treatments available, such as CBD oil and calcitonin gene-related peptide (CGRP) inhibitors, many find them too expensive or ineffective. Theranica hopes Nerivio can help fill the treatment gap, either as a standalone replacement for medication or as an adjunct.

"While some people with migraine get relief from prescribed or even over-the-counter medications, others do not respond to medications, or cannot tolerate their side effects. There are also people who cannot use medications due to contraindications or being at risk of drug-drug interactions or medication overuse headache,” Ailani said.

The FDA approved Nerivio as a treatment for acute migraine in adults in 2019. Last year the label was expanded to include children over the age of 12 with episodic or chronic migraine. Over 25,000 people in the U.S. have used the device, according to Theranica.

Nerivio is only available by prescription. When purchased wholesale, the listed price is $599 for a twelve-treatment unit, although buyers can save money by enrolling in a patient savings program, depending on their insurance coverage.  

Experimental Gene Therapy Could Cure Sickle Cell Disease

By Pat Anson, PNN Editor

Experimental gene therapy is helping sickle cell patients develop normal red blood cells and could potentially be a cure for the disease, according to research recently published in The New England Journal of Medicine.

In early-stage Phase 1 and 2 clinical trials at the University of Alabama at Birmingham, 25 patients treated with a gene therapy called LentiGlobin produced stable amounts of red blood cells containing hemoglobin after a single infusion. 

Sickle cell disease is a genetic disorder that causes red blood cells to form in a crescent or sickle shape, which creates painful blockages in blood vessels that can lead to anemia, infections, strokes and organ failure. About 100,000 Americans live with sickle cell disease, primarily people of African or Hispanic descent.

Unlike other gene therapies that edit or silence genes, LentiGlobin adds a modified gene that reprograms the diseased blood cells.  

“In this therapy, we do not change or edit the gene that causes sickle cell disease,” says Julie Kanter, MD, director of the UAB Adult Sickle Cell Clinic. “Instead, we use a viral vector to deliver a new gene that will make a healthy hemoglobin — a beta hemoglobin — into the stem cell. This is like coding new instructions into the cell.”

The new hemoglobin -- called HbAT87Q -- is slightly different from regular hemoglobin and is less likely to cause red blood cells to be misshaped.  The HbAT87Q can also be measured more accurately inside the cell, allowing doctors to know how much of the new hemoglobin a patient is making on their own.

Although the gene therapy looks promising, researchers say more advanced studies are needed to make sure LentiGlobin is safe and effective long-term. 

“In an earlier part of this study, we were not able to get enough of the new gene into each cell,” explained Kanter. This caused the blood cells to be stressed and for some patients to still have symptoms of sickle cell disease. Two patients in the initial group developed leukemia.  

“We need to see that we have fixed this problem, says Kanter. “We also need to make sure this procedure both reduces pain/stops all pain crisis and prevents organ damage from sickle cell. This will take time. We will have to watch people for the next two to 15 years and measure their organ function compared to those who did not get this therapy.”

A 2020 report by the National Academies of Sciences, Engineering, and Medicine called for major changes in the way sickle cell disease is treated in the U.S. Compared to other chronic illnesses, stem cell disease has received little attention from the healthcare community, resulting in a lag in the development of new treatments.

Many stem cell patients also feel stigmatized when they have a pain flare and go to an emergency room, because ER staff are often ignorant about the disease and believe patients are seeking drugs.

“People with sickle cell disease have endured unnecessary hardship for more than 100 years. They have fewer medications and therapies than many other diseases and have received much less attention and funding. We need new and better options for people with sickle cell disease,” said Kanter.

Bone marrow and stem cell transplants are currently the only cures for sickle cell disease, but it’s often difficult to find good donors. Fewer than one in five people with the disease have compatible donors.

Spending Time in Nature Can Reduce Chronic Pain

By Gabriella Kelly-Davies, PNN Columnist

A few months ago, I took part in a panel discussion with three other women who live with migraine or chronic headaches. One speaker, Australian journalist Sarah Allely, described how immersing herself in nature helped to relieve her debilitating headaches, anxiety and depression after a mild traumatic brain injury. It also drastically improved her focus and concentration.

Sarah’s brain injury occurred in 2015, when a passing car knocked her off her bicycle. Afterwards, a headache erupted in the base of her skull whenever she tried to read, write, watch television, or listen to music. She also struggled to concentrate and couldn’t work as a journalist for eight months.

Noisy environments such as bars, cafes and social gatherings that for years had energized Sarah, became unbearable. Despairing, she asked her medical team for advice. Her doctors admitted there wasn’t much they could do and suggested she learn to accept the situation. Sarah’s spirit sank as she contemplated a bleak future without all the things that had previously given her purpose and pleasure.

But that all changed when her friends invited her on a bush walk.

While trekking through the bush, Sarah’s headache lifted. So did her anxiety and depression. She wondered whether it was a fluke or if spending time in nature had reduced her symptoms.

During the following weeks, Sarah visited local bushland whenever possible. To her surprise, every time she did this, her headache, anxiety and depression eased. Intrigued, she wondered whether going to a local park or sitting in her garden would have a similar effect. She tried it. To her amazement, it worked!

A while later she stumbled across some magazine articles about research around the healing powers of nature. Curious about why her symptoms eased whenever she spent time in nature, Sarah decided to make an audio documentary. She wanted to understand the science behind her experience and the “optimum dose of nature” to relieve her physical and emotional pain.

During her research, Sarah came across several American scientists who were studying the science underpinning the healing effects of nature. Excited, she interviewed them, turning the conversations into six episodes of a podcast series she named Brain on Nature.

In the free podcast, Sarah shares her experiences discovering the healing powers of the natural world. Each episode follows her quest to discover why the natural environment changed her brain, helping her recover from a brain injury.

Seeking Connections With Nature

The scientists Sarah interviewed told her they were asking the same questions as her. Their studies found spending time in nature improved psychological and physical health, but they couldn’t pinpoint the precise reason for this response. Still, they were confident certain theories did help explain what was happening.

One of these theories is called biophilia, a belief that humans have an innate tendency to seek connections with nature. But for many of us living in bustling urban settings, constant traffic noise, bright lights, sirens, flashing billboards and yelling are the norm, and connecting with nature is a dream rather than a reality.

Instead of relaxing or exercising in a natural environment, we multitask, work on computers, talk on mobile phones, scroll through social media and send text messages. Living this way increases our stress levels, and for people with chronic pain, this can mean more pain.

But there is good news. Several studies show that when people turn off their electronic devices and sit in a quiet garden or stroll in a park, they feel refreshed and relaxed.

Pain specialists know that when a person living with chronic pain is calm, the volume of pain signals racing through their nervous systems is less than when they are anxious, angry or upset. So it makes sense that pain could reduce after spending time in a relaxing environment such as a garden or park.

Another possible explanation for Sarah’s experiences comes from Rachel and Stephen Kaplan’s Attention Restoration Theory. The Kaplans propose that exposure to nature is not only enjoyable but also relaxing and revitalizing. In Sarah’s case, whenever she spends time in the mountains on a weekend, she remains headache-free the following week. Her focus and concentration are also better. 

Fortunately, benefiting from the healing effects of nature is not about climbing Mount Everest or going on three-day treks in the forest. It can be a 10-minute walk in a local park or sitting in the garden smelling the flowers.

Once she understood the natural world was helping her injured brain to recover, Sarah felt compelled to share her learnings with others whose health might benefit from a dose of nature.  

“No one in the medical world suggested immersing myself in nature could reduce my symptoms,” she says. “But it works. I want others to know about it so they can try it for themselves.”

Hundreds of thousands of people around the world have listened to Brain on Nature and Sarah says their response is overwhelmingly positive.

“Two years after launching Brain on Nature, I’m still getting emails every week from people who say their life changed after listening to the podcast,” Sarah says. “I’m delighted it continues to have a positive impact and my search for answers has helped so many people.”

Sarah accepts some people might be skeptical about her belief in the natural world’s healing effects, especially if they have lived with chronic pain for several years and nothing has helped. She understands this response, but encourages anyone in pain to try a dose of nature for themselves to see if it eases their pain or improves their mood.

“When your pain is bad or you’re feeling grumpy, anxious or depressed, take yourself for a walk in the garden or a park,” Sarah suggests. “Put your phone on flight mode and see how you feel when you come back. Do you feel different? I challenge you to say spending time in nature doesn’t make any difference. So far I haven’t met anyone who can say that.”

While immersing ourselves in nature might not be a cure for chronic pain, it’s a powerful option in our pain management toolbox. Since learning about this approach, I now turn off my phone whenever we go for our morning stroll. Instead of feeling harassed by too many phone calls and text messages during our walk, I now feel relaxed and centered. And when I’m calm, I have less pain. I hope you do too.

Gabriella Kelly-Davies lives with chronic migraine.  She recently authored “Breaking Through the Pain Barrier,” a biography of Australian pain specialist Dr. Michael Cousins. Gabriella is President of Life Stories Australia Association and founder of Share your life story.

Exercise Reduces Pain by Increasing Beneficial Bacteria

By Pat Anson, PNN Editor

Regular exercise can benefit people in many different ways, helping us lose weight, reduce the risk of heart disease, and boosting overall health.  

But researchers at the University of Nottingham have found that exercise has an unexpected benefit for people with arthritis. Regular exercise increases levels of beneficial bacteria in their digestive tracts, which reduces pain and inflammation by increasing levels of endocannabinoids – cannabis-like substances naturally produced by the body.

The study, published in the journal Gut Microbes, is believed to be the first to find a potential link between endocannabinoids, exercise and gut microbes.

"Our study clearly shows that exercise increases the body's own cannabis-type substances. Which can have a positive impact on many conditions,” says lead author Amrita Vijay, a Research Fellow at Nottingham’s School of Medicine. "As interest in cannabidiol oil and other supplements increases, it is important to know that simple lifestyle interventions like exercise can modulate endocannabinoids."

Vijay and her colleagues enrolled 78 people in their study. Half of the participants did 15 minutes of muscle strengthening exercises every day for six weeks, and the rest did nothing. Blood and fecal samples were collected from both groups.

At the end of the study, participants who exercised not only had lower pain levels, they also had significantly more Bifidobacteria and Coprococcus 3 -- bacteria that produce anti-inflammatory substances and lower levels of cytokines, which regulate inflammation.

These gut bacteria were particularly adept at raising levels of short chain fatty acids (SCFAs), which increase levels of endocannabinoids. About a third of the anti-inflammatory effects of the gut microbes was due to their ability to raise endocannabinoid levels.

Importantly, the exercise group also had lower levels of Collinsella – a bacteria known to increase inflammation that is strongly associated with processed food and diets low in vegetables.    

“In this study we show that circulating levels of ECs (endocannabinoids) are consistently associated with higher levels of SCFAs, with higher microbiome diversity and with lower levels of the pro-inflammatory genus Collinsella. We also show statistically that the anti-inflammatory effects of SCFAs are up to one third mediated by the EC system,” researchers concluded.

Previous studies have also found an association between gut bacteria and painful conditions. A 2019 study at McGill University found that women with fibromyalgia had 19 different species of bacteria that were present in either greater or lesser quantities than a healthy control group.

Bacteria associated with irritable bowel syndrome, chronic fatigue syndrome and interstitial cystitis were also found to be abundant in the fibromyalgia patients, but not in the control group.    

Having a healthy diet can also affect pain levels for migraine, neuropathy and other types of chronic pain. A recent study funded by the National Institutes of Health found that migraine sufferers who ate more fatty fish and reduced their consumption of polyunsaturated vegetable oils — frequently found in processed foods — had fewer headaches.

FDA Approves First Virtual Reality Device for Chronic Low Back Pain

By Pat Anson, PNN Editor

The U.S. Food and Drug Administration has authorized the marketing of the first home-based virtual reality (VR) device for the treatment of chronic lower back pain in adults.

The EaseVRx headset uses guided VR programs to help patients relax, meditate and distract themselves from their pain, using the principles of cognitive behavioral therapy (CBT). The device is made by AppliedVR, a Los Angeles-based company that is developing therapeutic VR programs to help treat pain and other conditions.

"Millions of adults in the United States are living with chronic lower back pain that can affect multiple aspects of their daily life," Christopher Loftus, MD, acting director of the FDA’s Office of Neurological and Physical Medicine Devices, said in a statement. “Today's authorization offers a treatment option for pain reduction that does not include opioid pain medications when used alongside other treatment methods for chronic lower back pain."

Chronic lower back pain is defined as moderate to severe pain in the lower back lasting longer than three months. It is one of the most common chronic pain conditions and a leading cause of disability.

The FDA’s marketing approval is based a clinical study of 179 participants with chronic lower back pain. Half were given an EaseVRx headset to watch immersive 3-D programs daily for 8 weeks. The other half also used the headset, but only watched routine nature scenes as a sham treatment.

APPLIEDVR IMAGE

At the end of treatment, 66% of those who watched VR programs reported at least a 30% reduction in pain, compared to 41% of participants in the sham control group.

Nearly half of those in the EaseVRx group reported at least a 50% reduction in lower back pain.

No serious adverse events were reported during the study. About 20% of participants reported discomfort with the headset and nearly 10% reported motion sickness and nausea.

EaseVRx was given a Breakthrough Device Designation by the FDA in 2020 for treating fibromyalgia and chronic lower back pain. The designation speeds up the development and review of new medical devices.

Marketing approval of EaseVRx – known as a "De Novo pre-market review" – creates a new regulatory classification for VR devices. It clears the way for similar devices with the same intended use to obtain marketing authorization – a significant development for the fledgling virtual reality industry.

"We worked tirelessly over the past few years to build an unmatched body of clinical evidence that demonstrates the power of VR for the treatment of pain, and couldn't be more thrilled to achieve this important milestone," said Josh Sackman, AppliedVR’s co-founder and president. "But, our mission does not stop with this one approval. We're committed to continuing research that validates our efficacy and cost-effectiveness for treating chronic pain and other indications."

EaseVRx will only be available by prescription. Its software programs immerse users in a “virtual” environment where they can swim with dolphins, play games or enjoy beautiful scenery.  The content also incorporates biopsychosocial pain education, diaphragmatic breathing, mindfulness, and relaxation exercises.

AppliedVR headsets are already being used for pain management in over 200 hospitals and healthcare systems. A company spokesman told PNN that EaseVRx will be available on a limited basis through select providers toward the middle of 2022, with a full commercial launch expected in 2023. AppliedVR's is currently building a distribution network and working with insurers -- Medicare, Medicaid and commercial -- to establish reimbursement levels. No pricing plans have been announced for its VR headset or programs.

Experimental Injection Could Reverse Spinal Cord Injuries

By Pat Anson, PNN Editor

An experimental injection therapy that uses synthetic nanofibers to stimulate nerve cells could be used someday to reverse paralysis and repair damaged spinal cord tissues, according to a new study by researchers at Northwestern University.

In experiments on laboratory animals, the therapy successfully regenerated spinal cord nerves, reduced scar tissue and triggered the formation of new blood vessels. After a single injection, paralyzed mice regained the ability to walk within four weeks.

“Our research aims to find a therapy that can prevent individuals from becoming paralyzed after major trauma or disease,” said lead author Samuel Stupp, PhD, an expert in regenerative medicine and founding director of the Simpson Querrey Institute for BioNanotechnology (SQI) at Northwestern.

“For decades, this has remained a major challenge for scientists because our body’s central nervous system, which includes the brain and spinal cord, does not have any significant capacity to repair itself after injury or after the onset of a degenerative disease. We are going straight to the FDA to start the process of getting this new therapy approved for use in human patients, who currently have very few treatment options.”

Stupp and his colleagues used nanotechnology to develop synthetic nanofibers that mimic the natural environment around the spinal cord. Intensifying the motion of molecules within the nanofibers promotes the repair and regeneration of myelin, the insulating layer of axons that help nerve cells transmit electrical signals.

Researchers say the nanofibers biodegrade into nutrients for nerve cells within 12 weeks and completely disappear from the body without noticeable side effects. Their study, published in the journal Science, is the first in which researchers controlled the motion of molecules through changes in chemical structure to increase a therapy’s efficacy.

Nearly 300,000 people are currently living with a spinal cord injury in the United States. About 30% are hospitalized at least once a year after the initial injury and less than 3% of those with a severe injury ever recover basic physical functions. Life expectancy for patients with spinal cord injuries is significantly lower than healthy people and has not improved since the 1980s.

“Currently, there are no therapeutics that trigger spinal cord regeneration,” Stupp said in a news release. “I wanted to make a difference on the outcomes of spinal cord injury and to tackle this problem, given the tremendous impact it could have on the lives of patients.” 

The key behind Stupp’s breakthrough therapy is fine tuning the motion of molecules so that they can find and constantly engage with moving cellular receptors with bioactive signals. Injected as a liquid, the “dancing molecules” immediately form a gel in a complex network of nanofibers that mimic the extracellular matrix of the spinal cord.

“Receptors in neurons and other cells constantly move around,” Stupp said. “The key innovation in our research, which has never been done before, is to control the collective motion of more than 100,000 molecules within our nanofibers. By making the molecules move, ‘dance’ or even leap temporarily out of these structures, known as supramolecular polymers, they are able to connect more effectively with receptors.”

Stupp and his team found that fine-tuning the molecules’ motion within the nanofibers makes them more agile and results in greater therapeutic effect in paralyzed mice. They also confirmed that formulations of their therapy performed successfully in vitro tests with human cells, indicating increased bioactivity and cellular signaling.

Once connected to the nerve receptors, the dancing molecules trigger two cascading signals, both of which are critical to spinal cord repair. One signal induces myelin to rebuild around axons, which improves how nerve cells communicate with the brain. The second signal helps neurons survive after injury by promoting the regrowth of lost blood vessels that feed neurons and other cells for tissue repair. The therapy also reduces glial scarring, which acts as a physical barrier that prevents the spinal cord from healing. 

“The signals used in the study mimic the natural proteins that are needed to induce the desired biological responses. However, proteins have extremely short half-lives and are expensive to produce,” said first author Zaida Álvarez, a former research assistant in Stupp’s laboratory who is now a researcher scholar at SQI. “Our synthetic signals are short, modified peptides that — when bonded together by the thousands — will survive for weeks to deliver bioactivity. The end result is a therapy that is less expensive to produce and lasts much longer.”

While the new therapy could be used to treat paralysis after a major spinal cord injury, Stupp believes it could also be used to as a therapy for neurodegenerative diseases and strokes.

“The central nervous system tissues we have successfully regenerated in the injured spinal cord are similar to those in the brain affected by stroke and neurodegenerative diseases, such as ALS, Parkinson’s disease and Alzheimer’s disease,” Stupp said. “Beyond that, our fundamental discovery about controlling the motion of molecular assemblies to enhance cell signaling could be applied universally across biomedical targets.”

You can learn more about Stupp’s research in this podcast and by watching this video:

Recent research at Yale University and Sapporo Medical University in Japan found that injections of mesenchymal stem cells (MSCs) in patients paralyzed by spinal cord injuries led to significant improvement in their motor functions. In a small study, more than half of the paralyzed patients showed substantial improvements in function within weeks of being injected with autologous MSCs derived from their own bone marrow.

Guidelines Urge More Caution in Use of Invasive Neck Procedures

By Pat Anson, PNN Editor

Invasive procedures such as steroid injections, nerve blocks and radiofrequency ablation should be used more cautiously when treating chronic neck pain, according to new guidelines adopted by the American Academy of Pain Medicine and American Society of Regional Anesthesia and Pain Medicine.

The two medical societies formed a joint guidelines committee in 2020 to look into cervical spine joint procedures, which are increasingly used despite questions about their effectiveness and safety. The use of radiofrequency ablation -- heat from an electric current used to burn painful nerve endings — has increased by 112% in the U.S. over the past decade.

Spine pain in the neck or lower back is the leading cause of disability worldwide, with nearly half of adults likely to be affected at some point in their lives. The cervical facet joints, which allow the neck and back to tilt forwards, backwards and to rotate, are the primary source of pain in about 40% of patients with chronic neck pain and over half of those with neck pain after whiplash injury.

"It is precisely because neck pain and cervical spine procedures are so common, and there is so little high-quality evidence to guide care, that consensus guidelines are needed,” says lead author Steven Cohen, MD, a professor of anesthesiology at Johns Hopkins Hospital and co-chair of the guidelines committee.

The new guidelines, published online in the journal Regional Anesthesia & Pain Medicine, are based on over 400 publications and clinical studies of cervical spine procedures. Reviewers also looked at clinical signs and imaging used to select patients for particular procedures; the diagnostic and prognostic value of procedures; and several aspects of radiofrequency ablation (RFA), including how to reduce the risk of complications from the procedure and whether it should be repeated.

Because acute neck pain often resolves by itself, the guidelines recommend 6 weeks of conservative management, such as non-opioid painkillers and physical therapy, before opting for RFA or nerve blocks.

The reviewers found that RFA may be helpful for easing chronic neck pain, but only in patients whose pain corresponds to the joints being treated; those whose symptoms don’t emanate from a nerve root; and those who obtain meaningful pain relief from diagnostic nerve blocks, which are typically performed before RFA. 

Many insurance carriers require two nerve blocks, but the evidence indicates that doubling up will result in a significant number of unnecessary procedures and higher costs. Reviewers say the evidence for performing only a single block is much stronger for the neck than for the lower back.

The guidelines also recommend against stringent patient selection criteria, such as requiring nearly total pain relief from diagnostic blocks, because it might exclude patients who might benefit from radiofrequency ablation. None of the clinical studies that were reviewed support using pain relief thresholds above 50 percent.

Physicians should warn patients about the common side effects of RFA, such as tingling and burning sensations, numbness, dizziness, and loss of balance and coordination, which can last from a few days to a few weeks after the procedure. Patients also need to be told that RFA won’t cure them, and that pain relief typically lasts between 6 and 14 months. 

While most patients who have the procedure repeated will get pain relief, the benefits may wane over several years. RFA shouldn’t be repeated more than twice a year, the guidelines recommend.

Other key recommendations include:

• Use only soluble, short-acting steroids when injecting into the upper neck joints

• Use fluoroscopy imaging before spinal injections to avoid inadvertent needle placement

• Use smaller needles and electrodes than those used for the lower back

• Use nerve and muscle stimulation to improve effectiveness and reduce the risk of complications

• Take steps to minimize interference with implanted electrical devices such as pacemakers

“Clinical trials evaluating cervical facet blocks and RFA are characterized by widely disparate outcomes, and there is enormous variation in selecting patients and performing procedures. These multi-society guidelines have been developed to serve as a roadmap to improve outcomes, enhance safety, and minimize unnecessary tests and procedures,” the reviewers concluded.

Integrative and Comprehensive Pain Management Provide Only Small Benefits

By Pat Anson, PNN Editor

As concerns rose in recent years about opioid addiction and overdoses, it became trendy for healthcare providers to offer “comprehensive” or “integrative” pain management programs to patients – usually a combination of medication, physical and behavioral therapy, lifestyle changes and alternative treatments such as massage and acupuncture.

But a new study commissioned by the Agency for Healthcare Research and Quality (AHRQ) found that integrative and comprehensive pain management provide only small improvements in pain and function for people with chronic pain.   

Researchers at Oregon Health & Science University (OHSU) reviewed 57 “fair quality” clinical studies, most involving patients with moderate chronic pain caused by fibromyalgia, osteoarthritis and musculoskeletal conditions. Although the improvements in pain and function were small and the evidence limited, researchers concluded that integrative (IPMP) and comprehensive (CPMP) pain management programs worked about as well as individual treatments.

“Our review suggested that IPMPs and CPMPs may provide small to moderate improvements in function and small improvements in pain for patients with chronic pain compared with usual care and may be more effective than some medications alone. The average improvements in function and pain in our review were consistent with those reported for other therapies for pain, including opioids for chronic pain, nonpharmacologic treatments, and surgery,” researchers found.

One of the problems researchers encountered was the mish-mash of terms used to define integrative and comprehensive pain management – such as multimodal, multidisciplinary, interdisciplinary and biopsychosocial – the meaning of which often varies from provider to provider. Researchers said there was “no firm consensus on their definition or use,” which made it harder to evaluate their effectiveness. Only a few of the reviewed studies compared treatments head-to-head and many were of poor quality.

Although none of the trials specifically included Medicare patients, researchers concluded that IPMPs and CPMPs should be more widely used to address pain in the Medicare population.   

“To the extent that programs are tailored to patients’ needs, our findings are potentially applicable to the Medicare population. Programs that address a range of biopsychosocial aspects of pain, tailor components to patient need, and coordinate care may be of particular importance in this population,” they said. 

“Although use of selected individual treatments may serve some patients, a broader range of therapies that address the full scope of biopsychosocial concerns available in formal programs may benefit others. Research in the Medicare population and in patients with a broader range of pain conditions is needed as is research on the impact of program structures, coordination methods, and components on patient outcomes. Additional evidence from primary care-based programs is particularly needed.” 

One of the co-authors of the AHRQ study is Dr. Roger Chou, a primary care physician who heads the Pacific Northwest Evidence-based Practice Center at OHSU.  Chou, who co-authored the 2016 CDC opioid guideline, is a prolific researcher who has collaborated on several occasions with members of Physicians for Responsible Opioid Prescribing (PROP), an anti-opioid advocacy group.

PROP Vice President Gary Franklin, MD, “provided input” on the AHRQ study, as well as others.

In July, Chou declared a conflict of interest and recused himself from a meeting of the CDC’s Board of Scientific Counselors, which is evaluating a revision and possible expansion of the agency’s controversial guideline. Chou’s recusal apparently applied only to that meeting, as he is one of the co-authors of the revised opioid guideline — which has yet to be released publicly — and continues his involvement in federally funded pain research. 

OHSU researchers have conducted a series of reviews on a wide variety of pain therapies for the AHRQ. According to the website GovTribe, over the last five years OHSU has been awarded over $2 billion in federal grants for medical research. 

A group of patient advocates and researchers recently called for a congressional or DOJ investigation of the CDC opioid guideline, due to Chou’s significant role in writing it and his then-undeclared conflicts of interest.