INSIDER S GUIDE INTESTINAL BARRIER FUNCTION TEST

Transcription

1 Functional Medicine University s Functional Diagnostic Medicine Training Program INSIDER S GUIDE INTESTINAL BARRIER FUNCTION TEST By Ron Grisanti, D.C. & Dicken Weatherby, N.D. Limits of Liability & Disclaimer of Warranty We have designed this book to provide information in regard to the subject matter covered. It is made available with the understanding that the authors are not liable for the misconception or misuse of information provided. The purpose of this book is to educate. It is not meant to be a comprehensive source for the topic covered, and is not intended as a substitute for medical diagnosis or treatment, or intended as a substitute for medical counseling. Information contained in this book should not be construed as a claim or representation that any treatment, process or interpretation mentioned constitutes a cure, palliative, or ameliorative. The information covered is intended to supplement the practitioner s knowledge of their patient. It should be considered as adjunctive support to other diagnostic medical procedures. This material contains elements protected under International and Federal Copyright laws and treaties. Any unauthorized reprint or use of this material is prohibited Functional Medicine Training Program Page1 of 16

2 Contents CONTENTS... 2 INTESTINAL PERMEABILITY MARKERS... 3 BACKGROUND... 3 THE GASTOINTESTINAL TRACT THE HARBOR OF INFECTIOUS DISEASES... 4 STRESS AND XENOBIOTIC INFLUENCES ON THE GI TRACT... 4 MORE ON INTESTINAL INTEGRITY... 4 CONTROL OF MACROMOLECULAR UPTAKE VIA NON-IMMUNOLOGICAL AND IMMUNOLOGICAL PROCESSES... 5 COMPROMISED LYSOSOMES AND INCREASED MACROMOLECULE TRANSPORT... 6 INTESTINAL BARRIER FUNCTION TEST... 8 POSSIBLE OUTCOMES OF THE INTESTINAL BARRIER FUNCTION TESTING... 8 GUT BARRIER DYSFUNCTION... 9 OVERGROWTH OF ANAEROBIC MICROFLORA OVERGROWTH OF AEROBIC MICROFLORA NORMAL ANTIBODY LEVELS IMMUNODEFICIENT YEAST OVERGROWTH FOOD ALLERGY OR INTOLERANCE Functional Medicine Training Program Page2 of 16

3 Intestinal Permeability Markers Background It is increasingly evident that human diseases are most often related to lifestyle, and should in theory be preventable. The stress of modern life, our reduced physical activity, and our consumption of manipulated and processed foods, and of chemicals including pharmaceuticals all contribute to our decreasing resistance to disease. Changes in food habits in Western countries that no doubt constitute stresses to the human body and that may predispose to inflammatory, infectious, ulcerative, degenerative, and neoplastic diseases include the following: the consumption of 100 lb refined sugar per individual per year; the 10-fold increase in sodium consumption; the fourfold increase in consumption of bad saturated fat; a much reduced consumption of vegetable fibers, and of minerals such as potassium, magnesium, calcium, and chromium; and a considerable reduction in consumption of optimal ratio of fatty acids, membrane lipids, vitamins, and antioxidants. In severe disease, important food ingredients, such as arginine, glutamine, taurine, nucleic acids, vitamins, and antioxidants, such as glutathione, are often not supplied in large enough quantities. Furthermore, the desire of the food industry to prolong shelf life promoted alternative production methods such as the use of enzymes instead of live bacteria. Combined with extensive hygiene measures practiced during delivery and in childcare, children in Western societies may have difficulty developing a satisfactory protective indigenous gut flora. It is not known, but suspected, that this could be connected to the increasing incidence of allergy, and infections seen among Western children. A series of studies were published about an ethnic group in New Guinea with a dramatically different diet to that of people in the Western world. This diet contained no processed foods like butter, margarine, lard, oils, refined sugar, or alcohol. Functional Medicine Training Program Page3 of 16

4 Instead, the group's diet was rich in fiber, water, vitamins, minerals, and omega-3 fats such as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Despite the fact that about 80% of the population smokes and has a heavy consumption of saturated fat from coconut, cerebrocardiovascular diseases are virtually absent and the incidence of diabetes and cancer is very low. The Gastointestinal Tract The Harbor Of Infectious Diseases The condition and function of the gastrointestinal (GI) tract are essential to our well being. After the respiratory tract, the GI tract constitutes the second largest body surface area comparable in size to a tennis court. During a normal lifetime 60 tons of food pass through this canal, which is important for well being, but also constitutes an enormous threat to the integrity of the digestive tract and the whole body. It is not surprising, therefore, that this organ is often affected by inflammatory diseases and cancer. The continuous challenges to the GI surfaces might be why most of the surface cells have a rapid turnover; most are replaced after three to four days. Furthermore, the surface is protected by large quantities of important secretions, from saliva in the oral cavity to colonic secretion in the large bowel. These secretions contain factors of great importance for the lubrication of the mucosa and for functions of the GI tract, but also hundreds of ingredients of importance for intraluminal microbial defense. The secretory functions are extremely sensitive to foreign chemicals. About 50% of the 2000 pharmaceutical drugs registered in Sweden have reported GI side effects, for example, mouth dryness, nausea, vomiting, diarrhea, and constipation. It is hoped that future medicine will be more restrictive in the use of pharmaceuticals in general, and will use drugs with as few side effects as possible. Stress and Xenobiotic Influences on the GI Tract Stress is known to affect the composition of the intestinal preventive flora. Infants fed on artificial infant formulas have, in contrast to breastfed ones, a very low degree of colonization with lactobacilli and bifidobacteria but high counts in enterococci, coliforms, and clostridia. This may relate to excessive hygiene measures during delivery in Western countries, which prevent transfer of anaerobic microflora from mother to infant. Also, xenobiotics (an exogenous agent, such as an environmental chemical not usually present in the body) in the diet can affect the contents of intestinal microfiora. More on Intestinal Integrity Imbalance of gut mucosa permeability is the origin of the intestinal integrity problem. Digestion and absorption of nutrients, the critical factor for survival, depends on the state of development of the gastrointestinal tract. As well as digesting, absorbing and eliminating, the gut acts as a barrier between the internal and external environment. Functional Medicine Training Program Page4 of 16

5 This normal intestinal epithelium is protective because it constitutes a semi-permeable (selective) barrier, which prevents toxic, antigenic or pathogenic molecules or micro-organisms from entering the bloodstream. New discoveries relate to the beneficial effects of normal microflora in inhibiting metabolic events in the gut lumen, which promote colonic carcinogenesis. In addition, the intestinal epithelial barrier has substantial immunological activity, consisting primarily of secretory IgA, which binds to bacteria and other antigens preventing their attachment to epithelial cells. Failure or abnormalities in any one of these protective functions of the intestinal barrier can result in symptoms such as chronic fatigue, anaphylaxis, rhinitis, and skin conditions (atopic eczema) which may be classified as food allergy. Excess intake of alcohol, infections, NSAID use, stress, chemical contamination of food, broad spectrum antibiotics, corticosteroid hormones, and use of oral birth control pills are just a few factors that can adversely affect the intestinal barrier and permit pathogenic bacteria to produce infectious diseases either by invading into deeper tissues, or secretin antigens and / or toxins that damage local and distant tissues. This systemic translocation of enteric bacteria and endotoxins plays a major role in the development of abnormal systemic immunity, which can result in multiple organ failure. Damage to the mucosal barrier also occurs as a result of the overgrowth of yeast. The yeast release toxins and enzymes, and can also be translocated into peripheral organs. Yeast proliferates in the presence of mercury, and altered ph, which accompanies abnormal composition of bacterial flora. Any of the aforementioned insults to the intestinal barrier can result in increased permeability, which can be associated with unregulated uptake of partially digested proteins with resultant symptoms of food allergy. The key is to identify the primary cause and extent of increased GI permeability. Control of Macromolecular Uptake via Non-immunological and Immunological Processes Control of macromolecular uptake is dependent on a number of factors present either within the intestinal lumen or on the intestinal mucosal surface. These factors include both nonimmunological and immunological processes. Non-immunological factors (intestinal flora, secretion, gastric barrier, peristaltic movement and live filtration) help to control the proliferation of microorganims present in the gastrointestinal tract, aid in decreasing adherence of organisms to the gut surface and are important in limiting the available antigen mass that may otherwise overwhelm local immunological defense mechanisms and penetrate the mucosal barrier or enter the systemic circulation. Mucosal immunological factors (secretory IgA, cell mediated immunity, other immunoglobulins), especially the common Mucosal Associated Lymphoid Tissue (MALT), is present at all epithelial surfaces that are in contact with the external environment. This is largely independent of the systemic immune response and is governed by antigenic stimuli at epithelial surfaces. A failure or abnormality in one of these mechanisms can result in symptoms such as anaphylaxis, rhinitis, and skin rashes which may he classified as food allergy or intolerance. Functional Medicine Training Program Page5 of 16

6 In normal conditions, factors within the intestinal lumen of the surface of epithelial cells and within the lamina propria combine to limit the access of antigens to systemic circulation. After macromolecular ingestion by the intestinal absorptive cells, most of the portion which escapes breakdown is transported out of the cell by an exocytic mechanism. Any interference with intracellular capacity to digest macromolecules could therefore result in an increased intestinal transport of molecules. A number of factors can affect the stability and ability of lysosomes. For example, high concentration of vitamin A, radiation, bacterial and fungal endotoxins and exotoxins can increase the ability of lysosomes, causing the rupture of lysosomal membranes in various cellular systems. Compromised Lysosomes and Increased Macromolecule Transport Functional Medicine Training Program Page6 of 16

7 Lysosomes are organelles that contain digestive enzymes (acid hydrolases). They digest excess or worn-out organelles, food particles and engulfed viruses or bacteria. The lysosomes are more or less the wrecking crew of a cell. They digest macromolecules such as monosaccharides and break down damaged or old cell parts as well as bacteria. Each lysosome is surrounded by its own membrane due to the acidic conditions within it. They contain hydrolytic enzymes that break down whatever is necessary. These enzymes are only active within the acidic membrane of the lysosome so that in case of leakage or rupture, the enzymes will not be active within the cell. Another point is the fact that corticosteroids stabilize the lysosomal membrane preventing release of lysosomal enzymes thus interfering with the normal digestive function of these intracellular organelles. Inhibition of lysosomal function could in turn result in enhanced transport of intestinal antigens, causing an exaggerated immune response against bacterial antigens. The basis for possible immune-mediated disease in these cases may be the increased uptake of intestinal pathogens or macromolecules, which can interact with the circulating antibody and complement a target organ to produce characteristic autoimmune response. Functional Medicine Training Program Page7 of 16

8 Intestinal Barrier Function Test The Intestinal Barrier Function Test was developed because microbial flora imbalance cannot be fully understood in its diagnostic and therapeutic implications without coordination of the intestinal flora, including the dietary proteins. Recommended for patients who are suspected of suffering from increased intestinal permeability and malabsorption, candidiasis, food allergy, chemical hypersensitivity, fatigue, abnormal immune cell count and function, and who are at a post-operative stage or at risk for sepsis. The test provides an excellent tool for detection of the most common causes of altered intestinal permeability and poor assimilation of essential nutrients. The Mucosal Barrier Function test uses a single saliva and/or serum sample to assess the level of secretory immunoglobulin A, M and G to: Dietary proteins (corn, cow s milk, egg, gliadin, and soy) Enteric yeast (Candida albicans). Enteric aerobic bacteria (Escherichia coli and E. enterococcus). Enteric anaerobic bacteria (Bacteroides fragilis and Clostridium perfringens). A healthy mucosal barrier defense contains sufficient antibodies and should respond normally to encountered antigens. All of the dietary proteins, yeasts, and bacteria used in this test are normally found in the human body or diet and as such, the immune system should have normal recognition of these antigens and process them appropriately. During states of good health, all of the mucosal surfaces contain remarkable barriers against attachment of invading bacterial pathogens. But due to the typical western diet (chemical contamination of the food, increased dietary carbohydrates, usage of broad spectrum antibiotics, corticosteroid hormones and birth control pills), these barriers may break down and pathogenic bacteria may colonize large areas of the mucosal surfaces. From these colonized sites, pathogenic bacteria produce infectious diseases either by invading into deeper tissues or excreting antigens and/or toxins that damage local and distant tissues. The goal then of the Intestinal Barrier Function Test is to determine the extent of damage to the mucosal lining and provides a plan of action for the treating physician to improve this damage Possible outcomes of the Intestinal Barrier Function Testing 1. Normal levels of both food antigen antibodies and microflora anti-bodies. 2. Microflora imbalance characterized by higher than normal levels of microflora antigens and normal levels of food antigens, 3. Food allergy or intolerance characterized by higher than normal levels of food antigen antibodies and normal levels of microflora antibodies 4. Gut barrier dysfunction characterized by higher than normal levels of both food antigen antibodies and microflora antibodies 5. Immunodeficiency characterized by lower than normal Ievels of food antigen antibodies and microflora antibodies. Functional Medicine Training Program Page8 of 16

9 Gut Barrier Dysfunction Levels of IgM to all antigens tested were higher than normal, in this case from 8000 to 15,000 ELISA units. Levels of other types of antibodies were normal. This is because IgM is produced against recent entrance of antigens into the circulation and other antibodies may follow thereafter. This patient is exhibiting a gut barrier dysfunction. Functional Medicine Training Program Page9 of 16

10 Overgrowth of Anaerobic Microflora This patient had elevated levels of antibodies to anaerobic bacteria, from 8000 to 12,000 ELISA units, while antibodies to other microflora and dietary antigens was normal. Therefore, this patient had an overgrowth of anaerobic microflora. Determining the levels and ratio of bacterial groups to each other helps assess digestive and absorptive function. The ratios of the levels of the same specific immune marker for aerobic and anaerobic bacteria (i.e. IgA aerobic/iga anaerobic) should be about one to one. If these ratios are >2 or <0.5, then a dysbiotic condition exists. Specific infections should be ruled in or ruled out. Functional Medicine Training Program Page10 of 16

11 Overgrowth of Aerobic Microflora This patient had elevated levels of antibodies to aerobic bacteria, from 4000 to 17,000 ELISA units, while antibodies to other microflora and dietary antigens was normal. Therefore, this patient had an overgrowth of aerobic microflora. Determining the levels and ratio of bacterial groups to each other helps assess digestive and absorptive function. The ratios of the levels of the same specific immune marker for aerobic and anaerobic bacteria (i.e. IgA aerobic/iga anaerobic) should be about one to one. If these ratios are >2 or <0.5, then a dysbiotic condition exists. Specific infections should be ruled in or ruled out. Functional Medicine Training Program Page11 of 16

12 Normal Antibody Levels Levels of all types of immunoglobulins were tested. Normal antibody levels to the chosen antigens typically range between 400 and 2000 ELISA units. Functional Medicine Training Program Page12 of 16

13 Immunodeficient This profile reveals a patient who is immunodeficient. The antibody levels to all antigens were less than normal. Typical values were less than 400 ELISA units. If all reported results are < reference range, then the mucosal barrier is totally shut down. This means that there is effectively no mucosal immune response to antigens that present and also indicates severe intestinal permeability leaky gut. Functional Medicine Training Program Page13 of 16

14 Yeast Overgrowth This patient test reveals a yeast overgrowth. Levels of all antibody types to yeast antigens were higher than normal, in this case from 8000 to 12,800 EI.ISA units. Levels of antibodies to dietary antigens, and other microflora were normal. If IgA is elevated in the yeast compartment it means that Candida is attempting to invade the intestinal mucosa. Functional Medicine Training Program Page14 of 16

15 Food allergy or Intolerance This test profiles a patient with a food allergy or intolerance. The patient had increased antibody levels to dietary antigens far above normal and, in this case ,000 ELISA units. However, the antibody levels to intestinal microflora were in the normal range. Assessing the levels of antibodies to foods is important in determining the cause of possible chronic gastrointestinal inflammation. Such inflammation can be accompanied by symptoms, or it can be subclinical. If immune markers to dietary proteins are elevated, it is important to do further testing to determine which food the mucosal immune system is reacting to. Functional Medicine Training Program Page15 of 16

16 If one or more of the antibodies in each compartment (dietary proteins, yeast, aerobic bacteria and anaerobic bacteria) is elevated then the gut is leaky and proteins (antigens) are entering the general circulation. Functional Medicine Training Program Page16 of 16