Mucosal surfaces, such as those of the eyes, nose, throat, and GI tract, represent a large port of entry for pathogens and thus must be efficiently protected.
This goal is achieved by a combination of innate and acquired immunoactivity. Innate immunity includes mucus, lactoferrin, lysozymes, and certain cytokines. Acquired immunity includes the production of antibodies.
The primary antibody response at the mucosal level is secretory IgA (sIgA). sIgA is produced by activated B-cells in the mucosa where it forms immune complexes with pathogens and allergens, thereby preventing them from binding to and penetrating the intestinal mucosa. IgG is also found in the mucosa, but they are believed to be serum derived.
Antibody deficiencies are the most commonly reported immunodeficiencies worldwide.
Selective IgA deficiency is the most common primary immunodeficiency, with prevalence from as low as 1 in 223 in community studies to 1 in 400 in healthy blood donors. Diagnosis is made with a serum IgA, though salivary and fecal sIgA levels are also found to be absent or low. Patients can also have a partial IgA deficiency, which isn’t a genetic immunodeficiency. Rather, a partial IgA deficiency may be caused by environmental or lifestyle factors, such as nutrient deficiencies, drugs, virus’, or impaired immune function, that can lead to chronic IgA stimulation.
Over time, IgA production may decrease and a deficiency may be noticed in fecal, saliva or serum total IgA levels. Patients with low IgA levels have increased risk of infections in mucosal surfaces, food allergies, celiac- like enteropathies, IBD, and autoimmune disorders.
Some patients also have gastrointestinal issues and chronic diarrhea. Since sIgA serves to protect the gut, lower levels can also lead to an increased risk of leaky gut or dysbiosis.
Leaky gut syndrome is your first line of defense, sIgA is decreased and is unable to adequately fight invaders trying to get into the intestinal epithelium. When the epithelium becomes inflamed and irritated, the tight junctions in the epithelium become weakened and allow toxins or antigens, generally food particles, to enter.
These entering food particles cause the body to react by creating other classes of immunoglobulins, primarily IgG, to protect the blood and tissues. A patient with leaky gut may therefore have IgG reactions to many foods. An IgA deficiency can also lead to false-negative IgA-based test results, such as celiac.
IgA deficiencies occurred in 1 out of 131 patients tested for celiac disease. Many patients with IgA deficiency are asymptomatic. It is not understood why some individuals with IgA deficiency have almost no illness while others are very sick. Studies have suggested that some patients may be missing a fraction of their IgG (the IgG2 and/or IgG4 subclasses), and that may be part of the explanation of why some patients with IgA deficiency are more susceptible to infection than others. Also, it is not known precisely what percent of individuals with IgA deficiency will eventually develop complications; estimates range from 25% to 50% over 20 years of observation. The clinical manifestation in a given patient tends to remain constant (e.g. in patients with autoimmune conditions, recurrent infections do not tend to develop).
Clinical applications of secretory IgA antibody testing:
- Production is stimulated by bacteria & viruses, which are removed by sIgA and phagocytosis
- Patients deficient in sIgA are susceptible to pathogens in the G.I tract
- There is a particularly high prevalence of IgA deficiency in coeliacs (5%)
- Deficiencies may be associated with asthma, autoimmune disease, candidiasis, coeliac disease and food allergies
- Ulcerative colitis and Crohn’s patients all have low sIgA. There is some evidence that increasing the levels may help disease
- High levels are often found in patients with chronic infection (CMV, EBV and HIV)
- Lifestyle and nutritional factors influence levels
- Choline, EFA’s, glutathione, glycine, phosphatidylcholine, Vitamin C & zinc are all needed for efficient production
- Chronic dermatological conditions
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Elevated levels in saliva are associated with an immune response to stimulation by infections and inflammatory reactions. High levels of SIgA production may indicate an infection of the digestive system, in which case a Comprehensive Stool Analysis with parasites would be recommended.
Causes of elevated fecal sIgA:
- Any defective epithelial barrier
- A defective epithelial barrier allows bacterial and microbial penetration, which is the strongest stimulator of sIgA production.
- Celiac disease
- Colon cancer
- Infections
- IBS (especially the diarrhea subtype)
Therapeutic considerations for elevated fecal sIgA:
Assess for and treat root causes of immune upregulation /inflammation:
- Infection (bacterial, parasitic, and/or viral pathogen, potential pathogen)
- Compromised intestinal barrier function (i.e., intestinal permeability)
- Heightened response to noninfectious stimuli (i.e., food sensitivity/allergy, etc.)
Consider Food Antibody testing – If positive, consider elimination diet
Anthony
Unlimited Plan Member since 2021
I have been using Healthmatters.io since 2021. I travel all over the world and use different doctors and health facilities. This site has allowed me to consolidate all my various test results over 14 years in one place. And every doctor that I show this to has been impressed. Because with any health professional I talk to, I can pull up historical results in seconds. It is invaluable. Even going back to the same doctor, they usually do not have the historical results from their facility in a graph format. That has been very helpful.
Karin
Advanced Plan Member since 2020
What fantastic service and great, easy-to-follow layouts! I love your website; it makes it so helpful to see patterns in my health data. It's truly a pleasure to use. I only wish the NHS was as organized and quick as Healthmatters.io. You've set a new standard for health tracking!
Paul
Healthmatters Pro Member since 2024
As a PRO member and medical practitioner, Healthmatters.io has been an invaluable tool for tracking my clients' data. The layout is intuitive, making it easy to monitor trends and spot patterns over time. The ability to customize reports and charts helps me present information clearly to my clients, improving communication and outcomes. It's streamlined my workflow, saving me time and providing insights at a glance. Highly recommended for any practitioner looking for a comprehensive and user-friendly solution to track patient labs!
SIgA key function is to bind to invading micro organisms and toxins and entrap them in the mucus layer or within the epithelial cells [=cells that cover the inside and outside of the surfaces of your body], so inhibiting microbial motility, agglutinating the organisms and neutralising their exotoxins and then assist in their harmless elimination from the body in the faecal flow.
SIgA also 'tags' food as acceptable, so low SIgA leads to increased sensitivity to foods. Several studies link stress and emotionality with levels of SIgA.
Production is adversely affected by stress, which is mediated by cortisol levels. This could result in inadequate production of SIgA in response to a mucosal infection. Reduced SIgA levels may be associated with sub optimal adrenal output, in which case an adrenal stress index test would be recommended.
Causes of Low sIgA:
- Certain drugs can induce transient IgA deficiency which resolve after the causative drugs are removed. These include anti-inflammatories, sulfasalazine, hydantoin, cyclosporine, gold, fenclofenac, sodium valproate, and captopril.
- Certain viral infections, such as congenital rubella infection or Epstein-Barr virus (EBV) infection, may result in persistent IgA deficiency.
- Patients with poor nutrition may have difficulty mounting an appropriate immune response.
- Lower sIgA levels are frequently found in those with ulcerative colitis or in those whose first degree relatives have the disease. Research has shown a dysfunction in transepithelial IgA secretion, and thus a decrease in sIgA.
- A high antigenic load can result in depressed sIgA, even in healthy, asymptomatic individuals.
- Lower levels are found in those with excessive cortisol production, so decreasing stress may lead to higher sIgA levels.
- Lower levels may also be found in those with chronic infections or immune hypersensitivity. The decrease in resistance can lead to dysbiosis and an increased risk of infection and allergy.
Considerations for low fecal sIgA:
Because of the lack of clinical evidence, there is no clear cut-off value for low fecal sIgA. People with systemic IgA deficiency can have low levels of fecal secretory IgA. There is a demonstrated link between IgA deficiency and several GI diseases, including:
- celiac disease,
- giardiasis,
- nodular lymphoid hyperplasia,
- ulcerative colitis,
- Crohn’s disease,
- pernicious anemia,
- and gastric and colonic adenocarcinoma.
Low sIgA may reflect a loss of GI immune response resiliency. Fecal sIgA may be low in severe/prolonged IBD patients due to a switch from intestinal IgA to IgG production as well as a deficiency in producing IgA dimers and polymers.
Secretory IgA demonstrates an array of activities integral to the maintenance of intestinal homeostasis. It influences the composition of intestinal microbiota, down-regulates pro-inflammatory responses normally associated with the uptake of highly pathogenic bacteria and potentially allergenic antigens, and promotes the retro-transport of antigens across the intestinal epithelium to gut-associated lymphoid tissue (GALT). Therefore, a low sIgA is clinically significant.
The test result should be considered together with any other medical condition, other biomarkers, and microbiome profiles when interpreting the data.
Ways to Increase sIgA:
Treating the overall gut, with exclusion or rotation diets, glutamine, fish oils for inflammation, and the entire 4-R program includes:
Treatment Using Four “R” Program for Intestinal Health:
- Remove offending foods, medications, gluten (if sensitive) and reduce high fat foods, refined carbohydrates, sugars, and fermented foods (if yeast is present). Consider antimicrobial, antifungal, and/ or antiparasitic therapies in the case of opportunistic/ pathogenic bacterial, yeast, and/or parasite overgrowth (see otherrecommendations below).
- Replace what is needed for normal digestion and absorption such as betaine HCl, pancreatic enzymes, herbs that aid in digestion such as deglycyrrhizinated licorice and marshmallow root, dietary fiber, and water.
- Reinoculate with favorable microbes (probiotics such as Lactobacillus sp., Bifidobacter sp., and Saccharomyces boulardii). To enhance the growth of the favorable bacteria, supplement with prebiotics such as insulin, xylooligosaccharides, and fiber.
- Repair mucosal lining by giving support to healthy intestinal mucosal cells, goblet cells, and to the immune system. Consider L-glutamine, essential fatty acids, zinc, pantothenic acid and vitamin C.
Other Recommendations for Increasing sIgA:
- Exercise and relaxation techniques (such as footbaths, aromatherapy and massage) have been shown to increase sIgA levels.
- Decrease cortisol levels. Cortisol can direct the production of immune cells immuncytes, which produce sIgA.
- Probiotics (bifidobacter and Lactobacillus bacteria) have been shown to increase sIgA (as well as beneficial short chain fatty acids). They may also activate macrophages.
- Saccharomyces boulardii is used for the prevention and treatment of diarrhea of different etiologies and has been shown to enhance IgA immune response.
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Anthony
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I have been using Healthmatters.io since 2021. I travel all over the world and use different doctors and health facilities. This site has allowed me to consolidate all my various test results over 14 years in one place. And every doctor that I show this to has been impressed. Because with any health professional I talk to, I can pull up historical results in seconds. It is invaluable. Even going back to the same doctor, they usually do not have the historical results from their facility in a graph format. That has been very helpful.
Karin
Advanced Plan Member since 2020
What fantastic service and great, easy-to-follow layouts! I love your website; it makes it so helpful to see patterns in my health data. It's truly a pleasure to use. I only wish the NHS was as organized and quick as Healthmatters.io. You've set a new standard for health tracking!
Paul
Healthmatters Pro Member since 2024
As a PRO member and medical practitioner, Healthmatters.io has been an invaluable tool for tracking my clients' data. The layout is intuitive, making it easy to monitor trends and spot patterns over time. The ability to customize reports and charts helps me present information clearly to my clients, improving communication and outcomes. It's streamlined my workflow, saving me time and providing insights at a glance. Highly recommended for any practitioner looking for a comprehensive and user-friendly solution to track patient labs!
Healthmatters is a highly-personalized health dashboard.
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If you are still determining whether Healthmatters support your lab results, the rule is that if you can test it, you can upload it to Healthmatters.
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We’ve crafted multiple ways for you to navigate your data, whether you're glancing at a single report or delving into your historical test reports.
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Yes, you can. When entering values for the biomarker, you will see an "Edit Range" button. Click this button, and you'll have the option to enter a custom range.
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Alpha-1-Antitrypsin, Ascaris, Bacteroides spp., Bifidobacterium spp., Blastocystis hominis, Candida albicans, Candida spp., Citrobacter spp., Clonorchis/Opisthorchis, Clostridium spp., Cryptosporidium spp., Dientamoeba fragilis, Diphyllobothrium, Entamoeba histolytica, Enterococcus spp., Escherichia coli, Fasciola/Fasciolopsis, Geotrichum candidum, Giardia lamblia, Helicobacter pylori, Hookworm, Hymenolepsis, Klebsiella spp., Lactobacillus spp., Mold, Mouth Swab, Other Enterobacteriaceae, Other worms or unicellular intestinal parasites, Pancreatic elastase 1, pH, Proteus spp., Pseudomonas spp., Schistosoma, sIgA, Strongyloides, Taenei spp., Trichostrongylus, Trichuris trichiura
