Can you share a patient's success story with vagus nerve stimulation for autoimmune disease?

Kelly Owens, suffering from severe Crohn's disease and rheumatoid arthritis, experienced a dramatic recovery after receiving an implanted vagus nerve stimulator during a clinical trial in Amsterdam. She went from being wheelchair-bound to running up stairs, highlighting the device's potential.

How does Dr. Tracey define the vagus nerve?

The vagus nerve is actually two nerves (left and right), each containing 100,000 fibers. Eighty percent of these fibers carry sensory information from the body's organs to the brain, while 20% carry signals from the brain to the organs, acting as a crucial communication cable between the brain and body.

How does vagus nerve stimulation reduce inflammation?

When specific vagus nerve fibers are stimulated, they can turn off cytokine production, reducing inflammation. This was discovered accidentally in the lab and led to the development of devices that activate the 'inflammatory reflex,' suppressing excessive immune responses.

What is 'bioelectronic medicine' and how does it differ from traditional pharmaceuticals?

Bioelectronic medicine involves finding nerves that control molecular mechanisms of disease (like TNF production in rheumatoid arthritis) and building devices to control those nerves as therapy. Unlike biologics that suppress 100% of a target, VNS typically reduces pathological cytokine levels to a healthy range (e.g., 70% reduction), minimizing immunosuppression.

Is vagus nerve stimulation safe, and does it cause immunosuppression?

Vagus nerve stimulation has been FDA approved for depression and epilepsy since the 1990s, with decades of longitudinal follow-up on millions of patients. It does not carry black box warnings for immunosuppression and does not increase the risk of infection or cancer, as it only inhibits about 70% of cytokine production, leaving enough for a healthy immune response.

Can lifestyle practices like cold exposure and meditation influence the vagus nerve?

Yes, activities like cold plunges, meditation, and specific breathing practices are believed to directly or indirectly stimulate the vagus nerve and activate the parasympathetic nervous system. This can enhance recovery and promote a 'rest and digest' state after an initial 'fight or flight' response.

Are chronic inflammatory conditions increasing due to genes or environment?

Epidemiological studies exist, some suggesting an increase in autoimmune diseases and a correlation with latitude. It's a complex interplay of nature (genes) and nurture (environment), with factors like diet, microplastics, and previously unknown infections (like H. pylori in ulcers) playing roles.

Is transcutaneous auricular vagus nerve stimulation (tVNS) effective?

While often marketed as VNS, tVNS on the ear cartilage is a non-invasive and non-specific stimulation of a sensory branch of the vagus nerve. Studies show it can affect brain centers and reduce inflammation in some volunteers (about 70%), but its exact mechanisms and consistency across studies are still being investigated.

How did Ulf Anderson use auricular VNS to improve his health?

Retired professor Ulf Anderson, suffering from post-surgical depression and inflammation, used a TENS unit on his left ear twice daily, combined with famotidine. This regimen significantly improved his heart rate variability and respiratory sinus arrhythmia, turning his life around.

What are neural engrams and their connection to chronic inflammation and pain?

Professor Asha Rolls discovered that inflammation in tissues, such as the colon, can form stable neural networks or 'engrams' in the brain. These engrams act as memories of inflammation, capable of reactivating inflammatory responses and explaining why conditions like chronic low back pain persist.

What is the potential future of VNS and brain interfaces?

The ability to identify and map specific neural networks (engrams) linked to conditions like inflammation or pain could lead to future therapies. This might involve implanting micro-electrodes that communicate with an app to upregulate or downregulate inflammatory responses to specific cytokines or conditions in parts of the body.

How does the Dalai Lama connect meditation to the vagus nerve?

The Dalai Lama expressed a deep interest in science and meditation's physiological effects. Tibetan meditation practices involve channeling 'blue energy' down each side of the neck, across the chest, and into the abdomen, aligning with the anatomical path of the vagus nerve.

What Most Has My Attention Right Now — Credible (vs. Bogus) Vagus Nerve Stimulation

Tim Ferriss

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Key Moments

TL;DR

Vagus nerve stimulation shows promise for inflammation-related diseases, with FDA approval for rheumatoid arthritis.

Key Insights

Vagus nerve stimulation can be a powerful tool to regulate inflammation by activating the body's natural healing reflexes.

The vagus nerve is a complex network with 200,000 fibers, not a single cord, carrying vital information between the brain and body.

Conditions like rheumatoid arthritis, inflammatory bowel disease, and potentially depression may be treatable by targeting the vagus nerve.

While invasive implants are FDA-approved, research is ongoing into less invasive methods like focused ultrasound and specific ear stimulation.

Understanding the underlying mechanisms of inflammation and its connection to various chronic diseases is crucial for developing effective therapies.

The field of bioelectronic medicine is advancing, offering new hope for treating conditions previously managed solely by pharmaceuticals.

THE PROMISE OF VAGUS NERVE STIMULATION

The conversation highlights a significant breakthrough: FDA approval for Setpoint Medical's device to stimulate the vagus nerve for treating rheumatoid arthritis. This marks a pivotal moment for bioelectronic medicine, demonstrating the potential to harness the body's ancient inflammatory reflex. The vagus nerve acts like 'brakes' for inflammation, and this therapy aims to activate that reflex for controlled suppression of runaway inflammatory processes. This development is built upon decades of research and has been replicated globally, offering a new therapeutic avenue beyond traditional medications.

KELLY OWENS' TRANSFORMATIVE STORY

A compelling patient case, Kelly Owens, illustrates the profound impact of vagus nerve stimulation. Diagnosed with Crohn's disease and severe joint complications in her youth, Kelly faced a life in and out of wheelchairs and was advised against childbearing due to her condition. After receiving an implant for a clinical trial, her mobility and quality of life dramatically improved, enabling her to run up stairs – a feat unseen for years. Her story underscores the dramatic, life-altering potential of this therapy for debilitating inflammatory and autoimmune conditions.

UNDERSTANDING THE VAGUS NERVE'S MECHANICS

The vagus nerve is much more complex than commonly assumed, consisting of two intricate structures, each containing around 100,000 fibers. Originating at the brain's base, these nerves branch extensively throughout the chest and abdomen, connecting to major organs. Crucially, 80% of these fibers transmit sensory information from the body to the brain, acting as a vital communication highway. This bidirectional flow is key to the vagus nerve's role in regulating various bodily functions, far beyond a single 'cable' as often depicted.

INFLAMMATION: THE COMMON THREAD

Inflammation, though a natural protective response, becomes problematic when it's chronic and uncontrolled, contributing to numerous deadly diseases like heart disease, stroke, neurodegeneration, and cancer. The research suggests that the brain, via vagus nerve signals, can effectively turn off excessive cytokine production, a key driver of inflammation. By understanding and modulating this inflammatory reflex, scientists aim to develop therapies for a wide range of conditions that currently have limited treatment options.

BIOELECTRONIC MEDICINE AND FUTURE THERAPIES

The advancement of bioelectronic medicine, particularly vagus nerve stimulation, offers a paradigm shift. While invasive implants are proving effective, research is exploring non-invasive methods. These include focused ultrasound and transcutaneous auricular stimulation (ear stimulation), although the latter's efficacy and specificity are still under investigation. The key is to find precise ways to target the vagus nerve or its associated pathways to modulate inflammation and other bodily functions safely and effectively.

EXPLORING NEUROPLASTICITY AND COGNITION

Beyond inflammation, vagus nerve stimulation is showing potential in enhancing neuroplasticity, learning, and cognition. Studies on epilepsy patients have demonstrated improvements in cognitive test scores when their implanted vagus nerve stimulators are active. This suggests that manipulating neural pathways via the vagus nerve could have broader applications, including aiding language acquisition and potentially benefiting conditions related to impaired cognitive function, opening up exciting avenues for future therapeutic development.

THE ROLE OF THE EAR AND OTHER MODALITIES

The ear's intricate mapping to various body parts, stemming from ancient practices and supported by modern neuroscience regarding a branch of the vagus nerve connecting to the ear's cartilage, is a fascinating research area. While non-invasive ear stimulation devices are widely available, their direct and specific impact on the vagus nerve is debated. However, they may trigger reflexes or influence neural pathways in ways that still warrant further investigation and could offer therapeutic benefits for certain conditions through indirect mechanisms.

COMMUNITY RESEARCH AND THE FUTURE OF THERAPY

The conversation emphasizes the potential for distributed studies and citizen science, leveraging wearable devices to collect data on interventions like vagus nerve stimulation. While rigorous clinical trials are essential, patient-driven research can provide valuable insights. The discussion also touches on the complexity of conditions like depression, suggesting that inflammation may play a more significant role than previously understood, and that a multi-faceted approach, possibly involving vagus nerve modulation, could be key to effective treatment.

Mentioned in This Episode

●Supplements

●Tools

●Companies

●Organizations

●Books

●Concepts

●People Referenced

Common Questions

Setpoint Medical has received FDA approval to market a device that stimulates the vagus nerve to treat rheumatoid arthritis. This is based on 20 years of research demonstrating how the vagus nerve can suppress inflammation.

Topics

Bioelectronic Medicine Rheumatoid Arthritis Auricular VNS Interoception Neuroimmunology Engrams

Mentioned in this video

bookExplain Pain

A book by Lorimer Moseley and his co-author that discusses the variability and brain's role in pain perception, relevant to neuro-inflammation and engrams.

organizationDARPA (Defense Advanced Research Projects Agency)

A US government agency that provided crucial funding and support for early VNS research for conditions like sepsis and cytokine storm.

personDr. Paul Noir

A French doctor from the 1950s who originated the auricular acupuncture maps, later republished in China.

toolElectrode

A device used to directly stimulate the vagus nerve in implanted VNS, or for deep brain stimulation.

organizationFeinstein Institute at Northwell

Dr. Tracey's institute where 20 years of foundational research on the vagus nerve and inflammation was conducted.

bookThe Integrative Action of the Nervous System

A famous book by Charles Sherrington, recommended by Dr. Tracey to understand neural reflexes.

personFrank Austin

A leading expert in asthma research and a mentor of Dr. Tracey.

personUlf Anderson

A retired professor of pediatric rheumatology and close collaborator of Dr. Tracey, who used transcutaneous auricular VNS (TENS unit on the ear and famotidine) to treat his depression and inflammation.

toolTENS Unit (Transcutaneous Electrical Nerve Stimulation)

A non-invasive device used to apply electric current to the skin, which can stimulate sensory branches of the vagus nerve in the ear. Dr. Tracey clarifies these are not direct VNS devices.

personCharles Sherrington

One of the two fathers of neuroscience, whose work on reflexes explains how complex systems can be built from simple neural connections.

organizationFDA Approval

The US Food and Drug Administration's approval for Setpoint Medical's device to treat rheumatoid arthritis.

personProfessor Asha Rolls

A scientist who discovered that inflammation in tissues can form neural networks (engrams) in the brain that can reactivate the inflammation.

personKelly Owens

A patient with severe Crohn's disease and rheumatoid arthritis who experienced a remarkable recovery after receiving an implanted vagus nerve stimulator as part of a clinical trial.

personLiz Blackwell

A scientist who won the Alaska prize and later the Nobel Prize, present at the Dalai Lama's conference.

conceptPolyvagal Theory

A theory that the vagus nerve is central to the regulation of emotion, social connection, and fear response. Host initially dismissed it due to perceived lack of scientific rigor.

supplementFamotidine (Pepcid)

An over-the-counter antacid discovered to be a pharmacological vagus nerve stimulator, protecting COVID patients from lethal complications.

companySetpoint Medical

The company that developed an implantable vagus nerve stimulation device for rheumatoid arthritis, recently received FDA approval.

conceptCrohn's Disease

toolH. pylori

conceptrheumatoid arthritis