Doctors May Be Overlooking the Real Cause of Persistent Arthritis Pain

From scitechdaily.com

A new study suggests that lingering rheumatoid arthritis symptoms are not always caused by ongoing inflammation.

For people with rheumatoid arthritis, lingering pain and fatigue are often assumed to be signs that inflammation remains active. But new research suggests the real culprit may sometimes lie elsewhere. Researchers at Semmelweis University report that sleep disorders, depression, obesity, and smoking can help sustain symptoms even when inflammation is under control, potentially trapping patients in self-reinforcing cycles that are difficult to break.

In studies published in Nature Reviews Rheumatology and The Lancet Rheumatology, the team introduced a model designed to help doctors identify and address the underlying causes of symptoms sooner.

The researchers examined the connections between depression, smoking, obesity, sleep problems, and other health conditions in people with difficult-to-treat rheumatoid arthritis.

Dr. György Nagy and Lilla Gunkl-Tóth, authors of the study, with a patient. Credit: Semmelweis University

Rheumatoid arthritis is a chronic autoimmune condition in which the immune system mistakenly attacks the joints, leading to pain, swelling, and stiffness. The disease affects tens of thousands of people in Hungary. While most patients respond to treatment, an estimated 6 to 28 percent fall into the “difficult-to-treat” category because they do not achieve sustained remission despite therapy.

The findings suggest that conditions such as depression, obesity, smoking, and sleep disorders do more than simply occur alongside rheumatoid arthritis. They may also contribute to the persistence of the disease and its symptoms.

The Vicious Cycle of Pain, Depression, and Poor Sleep

For example, pain and depression can reduce physical activity, contribute to weight gain, and worsen both sleep quality and mood. These effects can then intensify pain and interfere with daily functioning, creating a self-reinforcing cycle that is difficult to break.

In addition to identifying these patterns, the researchers developed a model aimed at improving care for patients with difficult-to-treat rheumatoid arthritis. Under the widely used “treat-to-target” strategy, doctors regularly track measurable indicators of disease activity and adjust treatment if inflammation remains uncontrolled. This may involve increasing medication doses or switching to a different therapy.

The researchers argue that this approach can serve another purpose as well. It may act as an “early warning system” that helps identify cases in which symptoms are not primarily caused by inflammation.

“When target values improve, but the patient still suffers from pain and fatigue, it is worth taking a step back. In such cases, instead of automatically prescribing more medication, doctors should look for what is maintaining the symptoms – whether it is chronic pain syndrome, depression, sleep disorders, or obesity,” said Dr. György Nagy, head of the Department of Rheumatology and Immunology at Semmelweis University.

Dr. György Nagy and Lilla Gunkl-Tóth discussing their findings. Credit: Semmelweis University

A New Early Warning System for Persistent Symptoms

The team has observed that this approach can improve outcomes for patients with difficult-to-treat disease. In many cases, it may also strengthen the relationship between doctors and patients.

Their model has gained significant international attention. The publications that introduced the concept of difficult-to-treat disease and the associated treatment strategy have been cited more than 1,000 times by other researchers. The definition is now used worldwide not only for rheumatoid arthritis but also for other medical conditions.

The researchers are now focused on the next phase of their work. Alongside their ongoing studies, they plan to participate in projects that use artificial intelligence to develop more effective treatments for people with rheumatoid arthritis.

“With AI-based pattern recognition, we could identify subgroups among patients, and with the help of these data, we could create more effective, almost personalized treatment strategies for them,” explained Dr. Lilla Gunkl-Tóth, PhD student at Semmelweis University and first author of the publications.

https://scitechdaily.com/doctors-may-be-overlooking-the-real-cause-of-persistent-arthritis-pain/

Depression and Sleep Problems May Sustain Rheumatoid Arthritis Symptoms

From technologynetworks.com

Depression, sleep problems, obesity and smoking may sustain difficult-to-treat rheumatoid arthritis symptoms

According to researchers at Semmelweis University, not only inflammation, but also sleep disorders, depression, obesity, and smoking may sustain persistent rheumatic symptoms. In their publications in the journals Nature Reviews Rheumatology and The Lancet Rheumatology, they also proposed a model that can help identify and treat the true causes of symptoms in time.

Researchers at Semmelweis University analysed how depression, smoking, obesity, sleep disorders, and other health problems are linked to difficult-to-treat rheumatoid arthritis.

Rheumatoid arthritis is a chronic autoimmune disease in which the immune system attacks the joints, causing pain, swelling, and stiffness. It affects tens of thousands of people in Hungary only. Most patients respond well to treatment, but 6–28 percent belong to the so-called “difficult-to-treat” group because they do not achieve lasting remission despite therapy.

According to the publications in Nature Reviews Rheumatology and The Lancet Rheumatology, these factors may not only coexist with the disease but may also help maintain it.

For example, pain and depression may reduce physical activity, increase body weight, worsen sleep and mood – all of which can feed back into pain and everyday functioning, creating a difficult-to-break “vicious cycle.”

The researchers not only identified these patterns but also developed a new model that could improve the treatment of such difficult-to-treat patients. Under the currently used “treat-to-target” therapeutic approach, patients’ conditions are regularly monitored using measurable indicators, and if treatment does not sufficiently reduce inflammation, therapy is adjusted – for example by increasing the medication dose or switching to another drug. However, according to the researchers, this approach can function not only as a therapy but also as a kind of “early warning system”: it can quickly indicate when symptoms may not be caused solely – or at all – by inflammation.

“When target values improve but the patient still suffers from pain and fatigue, it is worth taking a step back. In such cases, instead of automatically prescribing more medication, doctors should look for what is maintaining the symptoms – whether it is chronic pain syndrome, depression, sleep disorders, or obesity,” said Dr. György Nagy, head of the Department of Rheumatology and Immunology at Semmelweis University. The researchers themselves have observed that this approach can improve outcomes for difficult-to-treat patients, and in many cases it can also positively affect the doctor–patient relationship.

The researchers’ model has achieved major international recognition: the publications introducing the concept of “difficult-to-treat” disease and the related treatment strategy have already been cited more than a thousand times by other researchers. Moreover, the definition is now used worldwide not only in the context of rheumatoid arthritis but also in connection with other diseases.

Meanwhile, the team is already working on the next steps: alongside their own research, they are planning to join projects that would use artificial intelligence to develop even more effective therapies for people with rheumatoid arthritis.

“With AI-based pattern recognition, we could identify subgroups among patients, and with the help of these data we could create more effective, almost personalized treatment strategies for them,” explained Dr. Lilla Gunkl-Tóth, PhD student at Semmelweis University and first author of the publications.

https://www.technologynetworks.com/tn/news/depression-and-sleep-problems-may-sustain-rheumatoid-arthritis-symptoms-412951 

Beyond Inflammation: Scientists Uncover New Cause of Persistent Rheumatoid Arthritis

From scitechdaily.com

Scar-driven changes in joint tissue may underlie treatment resistance in rheumatoid arthritis, opening the door to new targeted therapies.

Rheumatoid arthritis (RA) affects millions worldwide, causing persistent joint pain, swelling, and stiffness when the immune system mistakenly attacks the tissue lining the joints.

Over the past two decades, an expanding toolkit of anti-inflammatory and immune-targeting drugs has transformed care, yet a substantial subset of patients still don’t achieve remission, even after trying multiple therapies. For these individuals, ongoing symptoms can be debilitating, and clinicians have limited guidance on what, biologically, is driving the stubborn disease that remains after inflammation is brought under better control.

In a new Nature Immunology paper, Mass General Brigham researchers Kevin Wei, MD, PhD, and Kartik Bhamidipati, PhD, take on that problem by looking beyond broad immune signals and into the architecture of diseased tissue itself. Their team used next-generation mapping tools to see where specific cell types sit, how they interact, and how those relationships shift before and after treatment, capturing the joint microenvironment in unusually high resolution.

Their findings point to a crucial, and potentially targetable, piece of the treatment-resistance puzzle: fibroblasts and scarring pathways that appear to persist even when inflammation is brought under control. By revealing how disrupted cell-to-cell communication and wound-healing signals may drive ongoing tissue damage and pain, the work helps explain why some patients don’t get better with today’s anti-inflammatory strategies alone.

In the Q&A below, Wei and Bhamidipati discuss the unmet clinical need, the spatial transcriptomics approach that made this possible, and what these insights could mean for more precise therapies for patients who have run out of options.

A detailed “tissue map” of rheumatoid arthritis joints suggests that scarring pathway, not just immune inflammation, may help explain why some patients don’t respond to standard therapies. Credit: Shutterstock

What challenges or unmet needs make this study important?

Rheumatoid arthritis (RA) is a common autoimmune disease where the body’s immune system mistakenly attacks the lining of its own joints, causing chronic pain, swelling and stiffness.

While there have been remarkable advancements in the treatment of RA with an array of therapies that target inflammation, a large subset of patients (approximately 6-28%) continue to experience difficult-to-manage symptoms of disease even after receiving multiple lines of treatment. There is a critical need to identify new therapeutic approaches for patients who are refractory to existing treatment options.

What central question(s) were you investigating?

Our research focused on discovering why some people with rheumatoid arthritis don’t respond well to standard treatments, by looking closely at the biology of their joint tissue.

What methods or approach did you use?

We observed an exaggerated wound healing response (fibrogenesis) in the joints of patients who failed to achieve remission. Though the treatments were effective in depleting immune populations and reducing joint swelling, they were not adequately effective at alleviating joint pain in non-remitting patients, which was linked to increased tissue scarring.

We also discovered that the buildup of scar tissue in joints happens because the normal communication between blood vessels and endothelial cells with nearby support cells, called fibroblasts, gets disrupted. If we can find ways to help these cells talk to each other properly again, we might be able to stop or even reverse the harmful scarring that leads to ongoing joint problems.

What did you find?

We observed an exaggerated wound healing response (fibrogenesis) in the joints of patients who failed to achieve remission. Though the treatments were effective in depleting immune populations and reducing joint swelling, they were not adequately effective at alleviating joint pain in non-remitting patients, which was linked to increased tissue scarring.

We also discovered that the buildup of scar tissue in joints happens because the normal communication between blood vessels and endothelial cells with nearby support cells, called fibroblasts, gets disrupted. If we can find ways to help these cells talk to each other properly again, we might be able to stop or even reverse the harmful scarring that leads to ongoing joint problems.

What are the real-world implications, particularly for patients?

Our study identifies this type of tissue scarring as a key driver of treatment-refractory RA. This mechanism remains unaddressed by the current therapeutic landscape and offers a novel, targetable pathway for patients resistant to existing treatments.

What emerging trends in this field excite you right now?

Advances in technology are speeding up the deep molecular profiling of patient samples, ushering in an exciting era of precision medicine for autoimmune diseases where treatment is tailored to a patient’s unique molecular characteristics (such as protein levels, enzyme activity, and more).

This targeted approach promises to replace the current trial-and-error treatment methods with more effective interventions, significantly improving patient outcomes and quality of life.

https://scitechdaily.com/beyond-inflammation-scientists-uncover-new-cause-of-persistent-rheumatoid-arthritis/

Weak knees at 40? Orthopaedic surgeon explains 4 keys reasons behind premature knee arthritis, shares prevention tips

From hindustantimes.com

The knees are among the most underrated joints, which are responsible for bearing your entire body weight – Dr Rathi explains why knees start weakening early

Our knees are one of the body’s most hardworking joints, silently carrying our entire weight and enabling everyday movements – from walking and climbing stairs to simple daily tasks. Yet they often go unnoticed until pain begins to interfere with mobility. In recent years, knee discomfort has become increasingly common, especially among older adults, with osteoarthritis emerging as one of the most widespread joint conditions in India.

Experts warn that cases are rising steadily, but the encouraging news is that many of the underlying causes are preventable. With timely awareness and a few lifestyle changes, it may be possible to protect knee health and reduce the risk of long-term joint damage.

HT Lifestyle reached out the Dr Akhilesh Rathi – the director of robotics, joint replacement, orthopaedics and sports injury at Sri Balaji Action Medical Institute, Paschim Vihar, and the founder of Rathi Orthopaedics and Spine Clinic in Dwarka, New Delhi – to gain his expert insights on the matter.

He explains, “Our knee joint works like a smooth mechanical hinge. The ends of the bones are covered with cartilage – a soft, shock-absorbing layer that allows painless movement. When this cartilage gradually wears out, the bones start rubbing against each other. This leads to pain, swelling, stiffness and sometimes the frightening feeling that the knee may give way while walking. Medically, this is called osteoarthritis.”

                                                       Knee pain starts with negligence and lifestyle habits. (Unsplash)

Why knees start failing

Dr Rathi highlights, “Earlier, knee arthritis was mostly seen after 60 years of age. Today I routinely see patients in their 40s and even late 30s. The reason is not fate – it is lifestyle.” He outlines the following reasons for prematurely weaker knees:

1. Excess body weight

Increasing body weight places additional strain on the knees. Dr Rathi highlights that every extra kilogram of body weight can translate to nearly three times that load on the knee joints, significantly increasing the pressure they must bear during everyday activities such as walking, climbing stairs, or standing.

He emphasises, “Every extra kilogram of body weight puts nearly three to four kilograms of additional pressure on the knee joint while walking. Over years, the cartilage simply cannot tolerate this load.”

2. Weak thigh muscles

According to the surgeon, strong thigh muscles – particularly the front quadriceps – act as a natural support system for the knees. When these muscles weaken due to years of inactivity or prolonged sitting, the knees lose an important source of stability and support.

He explains, “The quadriceps muscles in the front of the thigh act as a natural support system for the knee. When these muscles weaken due to inactivity or long sitting hours, the knee loses stability. That is when patients experience ‘buckling’.”

3. Sedentary routine

According to Dr Rathi, a sedentary lifestyle, prolonged sitting – often linked to desk-bound jobs – and little to no physical activity are key contributors to knee instability and pain later in life.

He highlights, “Desk jobs, long screen time, and almost no physical activity have become the most common risk factors I see today.”

4. Old injuries

Dr Rathi highlights that the ghosts of past ligament or meniscus injuries can come back to haunt you later in life, especially if they were not treated or rehabilitated properly at the time. He warns that unresolved knee injuries can gradually damage the joint and significantly increase the risk of developing arthritis in the future.

The surgeon cautions, “A ligament tear or meniscus injury in youth, even if ignored at that time, often turns into arthritis years later.”

The biggest myth about rest

Dr Rathi highlights that one of the biggest myths surrounding knee pain is that rest alone can cure it. In his practice, he often sees people who begin avoiding walking or movement as soon as the pain starts, believing it will help the knee recover. However, he warns that this approach can actually make the problem worse. According to him, prolonged immobility does not cure knee pain – it often leads to greater stiffness and reduced joint function over time.

The surgeon emphasises, “A knee doesn’t heal by being immobilised – it only becomes stiff. Controlled movement is essential. The joint receives nutrition through motion. Without activity, stiffness increases and muscles weaken further.”

What actually helps

Dr Rathi highlights, “Strong muscles reduce the load on cartilage and act like a protective brace around the knee.” He outlines the following ways that can help prevent or manage knee pain:

• Regular walking on flat ground
• Quadriceps strengthening exercises
• Cycling or swimming
• Guided physiotherapy
• Weight reduction

                                                     Engaging your knees in activity can delay onset of pain. (Unsplash)

What to avoid

Dr Rathi warns that patients should be careful of the following:

• Frequent stair climbing
• Jumping exercises
• Deep squatting or sitting cross-legged for long periods
• Sudden high-intensity workouts after years of inactivity

Treatment options

According to the surgeon, in early stages, knee arthritis can often be controlled with exercise, weight management, and medication for pain relief when necessary. In moderate cases, injections and physiotherapy provide good improvement.

Dr Rathi suggests, “Surgery is not the first step – it is the last. But when cartilage is completely worn and daily life becomes difficult, knee replacement surgery becomes a very effective solution. Modern knee replacement allows patients to walk comfortably again and regain independence.”

The key takeaway

Dr Rathi stresses that knee arthritis does not develop overnight. The body gives warning signs – morning stiffness, difficulty in getting up from a chair, and knee buckling. Ignoring these signals only makes treatment more complicated later.

He concludes with the following advice: “Your knees are designed for movement. Protect them with activity, control your weight, and seek help early. The earlier you act, the longer you can avoid surgery and keep your natural joints healthy.”

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.

https://www.hindustantimes.com/lifestyle/health/weak-knees-at-40-orthopaedic-surgeon-explains-4-keys-reasons-behind-premature-knee-arthritis-shares-prevention-tips-101773305878188.html

Workplace Air May Up Your Risk for Rheumatoid Arthritis

From healthcentral.com 

New research says exposure to certain inhalants could increase the odds of autoimmune conditions

You might not suspect that the air you breathe in could affect your joints or your immune system. But inhaling dust, fumes, and chemical vapours on the job may impact your health in ways far beyond irritating your lungs or causing respiratory issues. Breathing in bad air could also raise your risk of developing rheumatoid arthritis (RA), new research suggests.

A large research review recently published in Arthritis & Rheumatology found that people whose jobs expose them to certain occupational inhalants are at significantly higher risk of developing RA compared to people who aren’t regularly exposed. This new study adds to the growing pile of evidence that inhaling certain substances into the lungs—including silica, asbestos, solvents, pesticides, animal dust, and engine exhaust—may play a key role in triggering RA and other autoimmune diseases.

An Emerging Picture of RA Risk

Scientists don’t fully understand why only some people develop RA, an autoimmune disease in which the immune system attacks the body’s own joints—leading to inflammation, pain, stiffness, and joint damage over time. They do know it involves a combination of genetic, environmental, and lifestyle risk factors, according to the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMSD).

One known risk factor for RA is smoking, according to NIAMSD. This suggests a lung-joint connection that has led researchers to investigate whether breathing in other kinds of harmful particles could also help trigger RA. “There are theories that things we inhale, either work-related or pollution-related, or with smoking cigarettes, may prompt an immune reaction,” says Julianna Desmarais, M.D., an associate professor of medicine in the division of arthritis and rheumatic diseases at the Oregon Health & Science University School of Medicine in Portland, OR.

Some studies have previously suggested a link between RA and breathing in certain types of dust and chemicals—with the most evidence for silica, commonly released into the air in industries like construction and mining. But the results haven’t been conclusive. For this paper, researchers wanted to evaluate the existing body of evidence on a variety of workplace inhalants to get a clear picture of whether they are truly a significant environmental risk factor for RA.

A Clear Signal in the Data

“Our study pulled together decades of global research,” says genetic epidemiologist and study co-author Xia Jiang, Ph.D, an assistant professor in the department of clinical neuroscience at the Karolinska Institute in Stockholm, Sweden, and full professor of epidemiology at the West China School of Public Health at Sichuan University in Chengdu.

The team systematically reviewed 31 studies in total and analysed data pooled from 25 different studies to look at how being exposed to 10 different types of chemicals impacted RA risk. Some of the studies were cohorts (meaning they followed people over time to see who developed RA), while others were case-control studies (comparing inhalant exposures among people with and without RA). The authors also accounted for other known risk factors, like smoking and age.

The results were clear. The review “found strong evidence that breathing in certain dusts and chemicals at work increases a person’s risk of developing rheumatoid arthritis,” says Dr. Jiang.

For seven of the 10 inhalants researchers looked at, there was a significant effect—increasing somebody’s risk of RA anywhere from 20% to 49%, depending on the substance:

• Fertilizer: 49% higher risk

• Engine exhaust: 45% higher risk

• Asbestos: 39% higher risk

• Silica: 36% higher risk

• Pesticides: 32% higher risk

• Solvents: 24% higher risk

• Animal dust: 20% higher risk

For many of these agents, there appeared to be a dose effect—meaning that a longer duration or higher intensity of exposure correlated with a greater increase in RA risk. (But the authors note that exposure measurement varied widely across studies).

What surprised the researchers was the variety of inhalants linked to RA. “We expected silica and asbestos to show an effect,” Dr. Jiang says, but “the strength of the connection for some less-studied exposures was striking.” This means that working in industries we might not traditionally think of as particularly dusty or high-risk—like farming and transportation—may increase RA risk, Dr. Jiang explains.

The researchers also identified 25 other inhalants that were associated with an increased risk for RA (such as fungicides, carbon monoxide, welding fumes, and pulp or paper dust). But there weren’t enough studies to include these substances in the analysis.

                                                                                            GettyImages/skynesher

How Inhalants Might Trigger RA

How could what’s going on in your lungs end up affecting your joints? Scientists think that the lungs may act as a sort of gateway where autoimmune disease begins. “The lung interacts with the outside world in a unique way,” Dr. Desmarais says. Inflammatory dusts and vapours “may lead to an immune reaction that starts in the lungs, but later causes symptoms elsewhere, such as the joints,” Dr. Desmarais says.

“It’s a case of the immune system ‘misfiring’ after being repeatedly triggered in the airways,” Dr. Jiang elaborates. “When you inhale irritating particles, they can cause mild, ongoing inflammation in the lung. In some people, this may confuse the immune system, causing it to attack the body’s own tissues—like the joints—instead of just dealing with the dust.” This may be more likely to happen in people who are already genetically predisposed to RA, Dr. Desmarais adds.

There’s a decent chance that this same process could play a role in other autoimmune diseases. “We already know that smoking is a risk factor for lupus, multiple sclerosis, myositis, and scleroderma,” Dr. Jiang points out. “If inhaled substances can disrupt immune regulation and trigger one autoimmune disease like RA…[they] may provide risk also for these other autoimmune diseases.”

Looking Ahead

Experts would like to see more research into what “dose” of exposure seems to trigger immune responses that lead to RA or other autoimmune diseases. “We need to understand how much and how long exposure is needed to increase risk. Is there a threshold?” says Dr. Jiang. Another big question is how breathing in more than one of these substances could impact RA risk, Dr. Desmarais says, given that people often encounter several dusts or chemicals at once in their workplace.

Researchers also hope to learn how different populations might be affected differently. Future studies could look into whether this exposure threshold varies based on the age or ethnicity of the patient, Dr. Desmarais says—as well as sex, adds Dr. Jiang. “And we need to know how [inhalant exposure] interacts with genetics and lifestyle factors, like smoking,” Dr. Jiang says.

Ultimately, the research into the effects of workplace inhalants will likely expand beyond rheumatoid arthritis—and potentially help answer bigger questions about autoimmunity. “The exposures that we found to be risk factors for RA should also be investigated in other autoimmune diseases,” Dr. Jiang says. And if that turns out to be the case, “workplace air quality might be a broader health concern than previously recognized,” Dr. Jiang says.

https://www.healthcentral.com/news/rheumatoid-arthritis/workplace-air-and-rheumatoid-arthritis-risk

Circular link between gum disease and rheumatoid arthritis revealed in new study

From birmingham.ac.uk

Association between periodontitis and rheumatoid arthritis is long established, but which comes first has long been debated by scientists 

Researchers have uncovered compelling evidence of a two-way relationship between rheumatoid arthritis (RA) and periodontitis (gum disease), showing that treating gum disease can significantly reduce inflammation and improve RA symptoms for patients.

The study, published in the Journal of Clinical Periodontology, examined how microbial imbalances in the mouth – known as dysbiosis – contribute to systemic inflammation in RA patients.

Led by University of Birmingham researchers from the Periodontal Research Group and the National Institute for Health and Care Research (NIHR) Birmingham Biomedical Research Centre, the University of Michigan and Queen Mary University of London, the study investigated the interactions between oral bacteria and immune molecules, and correlated the molecular interactions with clinical outcomes in 159 participants, including RA patients with and without gum disease, individuals with gum disease alone, and healthy controls.

"We found that treating gum disease through intensive periodontal therapy broke this cycle: it improved RA activity scores, reduced antibodies to oral pathogens, and re-established a balanced interaction between oral microbes and the immune system within three months."

Professor Iain Chapple, University of Birmingham

Key Findings

• RA patients exhibited distinct oral microbiomes, even before gum disease developed. These microbial communities were richer and more diverse than those in healthy individuals and formed dense interaction networks.

• Certain bacteria, such as Cryptobacterium curtum and Prevotella species, were strongly associated with RA and correlated with pro-inflammatory cytokines.

• RA patients had higher levels of antibodies against oral pathogens, particularly Porphyromonas gingivalis, a bacterium linked to protein citrullination – a process implicated in RA autoimmunity.

• Severity of gum disease strongly correlated with RA activity scores, including joint swelling and pain.

Professor Iain Chapple, co-lead for the oral, intestinal and systemic health theme of Birmingham’s NIHR Biomedical Research Centre, said:

“These findings are extremely significant, as it’s the first time that rheumatoid arthritis (RA) and periodontitis (gum disease) have been shown to be linked in a circular relationship, creating a vicious cycle of inflammation. RA-driven systemic inflammation disrupts the oral microbiome, fostering harmful bacteria that trigger gum disease; in turn, these bacteria worsen oral inflammation and impair immune responses, which in turn fuel RA by generating antibodies linked to joint damage.

“We found that treating gum disease through intensive periodontal therapy broke this cycle: it improved RA activity scores, reduced antibodies to oral pathogens, and re-established a balanced interaction between oral microbes and the immune system within three months.”

Professor Purnima Kumar, senior author and Chair of the Department of Periodontics and Oral Medicine at the University of Michigan said: “Oral health is the result of an evolutionary balance between the resident oral bacteria and the mucosal immune system. We discovered that RA disrupts this microbial-mucosal interaction, leading to a self-perpetuating cycle of inflammation and dysbiosis.

“When we treat periodontitis, we reboot these molecular interaction networks, thereby moving the oral ecosystem towards balance and disrupting the cycle of systemic inflammation. This is yet another reminder that the body functions as an integrated biological system, and therefore, therapeutic interventions need to be integrated to be effective.

The importance of integrated care

RA is a leading cause of disability in the UK, affecting around 1% of the population; whilst gum disease is widespread and often overlooked in systemic health management. This research highlights the importance of integrated care to improve the overall health and wellbeing of patients navigating inflammation.

The study also evaluated the impact of intensive non-surgical periodontal therapy – professional cleaning combined with oral hygiene coaching – compared to oral hygiene advice alone:

• Periodontal treatment reduced gum inflammation and restored balance between oral bacteria and the immune system.

• Levels of inflammatory cytokines in gum fluid dropped significantly after treatment.

• Circulating antibodies to oral bacteria decreased, and RA clinical scores improved, including reductions in joint tenderness and disease activity.

• Network analysis showed that therapy “re-wired” immune–microbial interactions, strengthening the body’s ability to control harmful bacteria.

Dr Isabel Lopez-Oliva, a NIHR Academic Clinical Lecturer from Queen Mary University of London and a co-author of the study, added: “We’ve demonstrated that periodontal therapy offers measurable benefits for RA patients, even when the disease is established. This opens the door to new strategies for reducing inflammation and improving quality of life.”

The research was supported by the National Institute of Dental and Craniofacial Research and delivered through the National Institute for Health and Care Research (NIHR) Birmingham Biomedical Research Centre (BRC), which brings together multidisciplinary research teams specialising in a wide range of inflammatory conditions – including inflammatory arthritis and periodontitis. The study builds on previous work from the OPERA trial, which first suggested that periodontal treatment could improve RA outcomes.

https://www.birmingham.ac.uk/news/2026/circular-link-between-gum-disease-and-rheumatoid-arthritis-revealed-in-new-study