Autoimmune diseases are caused by inflammation and leaky gut (Here’s how to fix it)

Our modern lifestyle is great in many ways, but it isn’t without its drawbacks. We are being exposed to an ever-increasing toxic milieu of chemicals, pathogens, physical stress, mental stress, toxins, and genetically and hormonally-modified foods. Not coincidentally, the incidence of autoimmune diseases has nearly tripled over the past few decades. Though we can’t pinpoint the causes, one thing is clear: this toxic milieu is having an effect.

Autoimmune diseases occur when the immune system loses the ability to differentiate between self and non-self, resulting in a misguided attack on your body. There are at least 80 known autoimmune diseases and each is different depending on which tissue the body attacks. Rheumatoid arthritis (RA) is the immune system attacking your joints. If the body is attacking certain connective tissues, that is lupus.

The development of an autoimmune disease requires two mistakes: an initial priming event, and a subsequent promoting event by the immune system. We are not sure yet what triggers these mistakes, but evidence is mounting that chronic, low-level inflammation is one important factor. Chronic inflammation—even mild inflammation—is believed to be a significant trigger not just for autoimmune diseases, but also for heart disease, type 2 diabetes, and cancer.

Locating the immune system

When I first heard that 70 percent of my immune system was in my intestinal tract, I was quite surprised. The medical term for this is GALT, or gut-associated lymphoid tissue. I had assumed that my immune system would be concentrated around my heart, brain, eyes, and so on. It’s protecting my vital organs, so I thought it would be concentrated in these areas accordingly. It seemed odd to me to have such a high percentage in the intestinal tract. So why is almost my entire immune system in my gut?

In trying to understand this I drew a simple picture of the human body and realized something interesting. On closer inspection, the intestinal tract is actually open to the external environment. Something in the mouth is not technically in the body until it is absorbed. Our intestinal tract is actually an external environment—albeit an internal, external environment. If you swallow a penny (yes this happens from time to time, ask any pediatric emergency physician), the penny never actually enters the body. Rather it is surrounded by the intestine and is in this internal external environment temporarily.

The human intestinal tract has a massive surface area. For reference, our skin has the surface area of a bed sheet, our lungs have the surface area of a tennis court, but the intestinal tract—stretched out and flattened—would have the surface area of a football field.

It is vital for our health that we protect against toxins, bacteria, parasites, viruses, and other potential invaders crossing this border and entering our body. Since the intestinal tract is the barrier, it makes sense that the immune system is so prominent in the intestinal tract. We are breathing in and ingesting toxins and bacteria with every breath and every meal, and this large absorptive surface needs an army at the ready to attack anything harmful that crosses and tries to enter the body.

As we said above, the immune system’s goal is to distinguish between self and non-self. Millions of cells in the immune system and antibodies in our body are constantly bumping into proteins and other molecules in circulation. They very quickly recognize these as self or non-self. The rules are simple: if it is self, leave it alone. If it is non-self, kill it.

This system is generally very good at proper recognition. But what happens if there is a mistake, and what situations render that more likely?

A case of mistaken identity

Let’s say we have some microscopic injury or area of inflammation in the gut. It could be microtrauma from ingested food or the result of a mild viral or bacterial infection. Whatever the case, this small area of inflammation may cause a local increase in gut permeability (or leaky gut), allowing a larger-than-appropriate food particle to cross the basement membrane of the intestines and enter the local bloodstream.

The immune system is right there and ready to respond. This abnormally large food particle might be treated as a foreign body by the immune system, so you make an antibody against that food resulting in a food sensitivity. That, however, is not the biggest problem.

The reaction itself causes the release of local inflammatory mediators that trigger another reaction, which may lead to more “leaky gut” and more large food particles crossing into the blood. This cycle can end in a state of chronic low-level inflammation in the gastrointestinal tract. Remember, this is a football field-sized organ that is now inflamed. If you get a football field-sized organ angry, you are not going to thrive, to say the least.

With this massive barrage of GI inflammation and antibody production, the odds of a case of mistaken identity increase greatly. If that happens, an “autoantibody” is produced that incorrectly identifies self as non-self. Autoantibodies trigger inflammation against your body tissue.

A simple blood test can detect these antibodies. The appearance of these autoantibodies is the first step in the development of autoimmune disease. The most common autoantibody is called ANA, anti-nuclear antibody. This nonspecific autoantibody is a warning sign that the immune system has been primed. If another similar mistake occurs, there is a high likelihood that the person will develop an autoimmune disease.

The tipping point for Autoimmune diseases

So here’s the big question: which auto-immune disease will they develop? That depends on what the second mistake is. If that autoantibody falsely identifies a joint, we call that rheumatoid factor. A positive ANA plus a positive rheumatoid factor equals rheumatoid arthritis. If the second mistake is against certain connective tissues we call it scleroderma, or lupus. If it is thyroid, we call it Hashimoto’s thyroiditis, and so on.

Why do some people develop autoimmune disease while others do not? How do we account for times when the same underlying pathologic process is at play, yet leads to very different clinical presentations?

We all have unique weak spots genetically and we all have slightly different environmental influences. You may be prone to eczema, irritable bowel, or Crohn’s disease, while I may be prone to ulcerative colitis, depression, or an autoimmune disease. The challenge for physicians lies not in identifying these differences, but rather in identifying the pathologic process that triggers each person’s symptoms. This is a key point, and this is where I feel my traditional training failed me.

Many times patients have come to me with arthritis, saying, “My doctor tested me for rheumatoid arthritis and I am ANA positive, but my rheumatoid test [rheumatoid factor or RF] was negative.” They were told that it might be rheumatoid arthritis but it is too early to say for sure. The doctor planned to check the RF level again next year. In the meantime they were usually prescribed anti-inflammatory medications to treat their symptoms.

A fire starting

This is problematic, to say the least. A positive ANA is a warning sign akin to smoldering embers. In someone with a lot of arthritis symptoms, a positive ANA and negative RF tell me the fire is kindling. Waiting for the fire to gain ground and show up as a positive RF so you can then prescribe powerful and dangerous medications that do nothing to stop the underlying problem is the wrong approach. These medications are fraught with dangerous potential side effects including cancer and “infections that may lead to death.” (You’ll see this if you read the inserts that come with the prescriptions.)

What is the key in curing Autoimmune diseases?

There really is not just one answer to the question. People can get better because we help calm their immune system down by reducing the total load of stressors to their body, help their gut heal, decreased their inflammatory cascade, and replaced their nutritional deficiencies. I think this can decrease the likelihood for people to develop one or more autoimmune conditions.

It can be said that every patient is their own clinical trial: no matter what the results are, they are 100 percent statistically significant for that patient. I strongly feel that individualized medicine is the next step in the progressive evolution of medical care. It is not “alternative medicine” to me. It is “sound, evidenced based, individualized, preventive, natural, and nutritional medicine.”

That particular specialty has not been invented yet, unfortunately.

In a bit of irony, although I treat an individual, I can apply the same principles of treatment to every patient. So the good news for me is that even if I am not sure why a patient is suffering symptoms—or even what their actual diagnosis is—I can apply sound principles of medicine and logic. When I do this people often get better even if I don’t always know the exact reasons why. I may not always know why you got better, but if I know that you got better, sometimes that’s good enough.

If you have been diagnosed with an autoimmune disease or if your doctor has been suspicious enough to order the tests, some of what I described above may be occurring in your body. It is important that you find a physician that understands and treats the underlying causes of your symptoms, not just the symptoms themselves—remember, you don’t just want to feel better, you want to be better.

About the Author

Jeffrey Hendricks, MD, has practiced emergency, occupational, family, alternative, and integrative medicine. He has served as medical director for Shoreline Occupational Medicine, Bosch Automotive Corp, Shoreline Alternative and Integrative Medicine, and Biogenesis Medical and Wellness Centers. He is a triathlete, inventor of RIZE health drink, and CEO of Nothing Ventured, LLC.

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