Mar 31, 2021 · 8 IgG is the predominant immunoglobulin in normal serum (70–75%, ∼1,000 mg/dL). 9 Immunoglobulins are the carriers of humoral immunity, and hence, every increased or reduced value of certain groups of proteins is an indicator not only of the existence of some morbid process but also of the degree of its activity. 10 If your immunoglobulin levels are too high, it may be a sign of an autoimmune disease, a chronic illness, an infection, or a type of cancer.. What is normal immunoglobulin A QN serum? Clinical Information. In normal serum, about 80% is immunoglobulin G (IgG), 15% is immunoglobulin A (IgA), 5% is immunoglobulin M …An immunoglobulin test checks the amount of certain antibodies in your body. IgA is one of the types of antibodies that protects you against infections in the lungs, sinuses, stomach, and intestines. A high IgA level can indicate cancer, such as multiple myeloma, lymphoma, or leukemia. Learn more about the types of immunoglobulin, why you might need this test, how it's done, and what your results mean.Biopsies may be avoided in children with high immunoglobulin A tissue transglutaminase (i.e., 10 times the upper limit of normal or more) and a positive test for immunoglobulin A endomysial ...Questions and answers about the Cancer Screening Research Network (CSRN) are grouped into 5 categories and are available on individual pages: General Questions and answers about th...Clinically, serum immunoglobulin levels are frequently increased in patients with cirrhosis, and the elevation of a specific class of serum immunoglobulin is associated with a distinct liver disease. For example, elevated IgM is correlated with primary biliary cirrhosis, elevated IgG with autoimmune hepatitis, and elevated IgA in alcoholic ...Immunoglobulin A, Qn, Serum. Optimal Result: 87 - 352 mg/dL. Interpret your laboratory results now. Immunoglobulin A (IgA), one of the five primary immunoglobulins, plays a pivotal role in mucosal homeostasis in the gastrointestinal, respiratory, and genitourinary tracts, functioning as the dominant antibody of immunity in this role.Interpret your laboratory results now. Free light chains will normally be present in the blood at low levels, with a kappa/lambda ratio of approximately 0.26 to 1.65 for individuals with normal kidney function. Excess production of free kappa or lambda chains can alter this ratio. Monoclonal free light chains are found in serum of patients with ... Biopsies may be avoided in children with high immunoglobulin A tissue transglutaminase (i.e., 10 times the upper limit of normal or more) and a positive test for immunoglobulin A endomysial ... Interpretation. Moderate-to-strong positive results for anticardiolipin (aCL) IgM antibodies (≥40 IgM phospholipid [MPL] units) are a diagnostic criterion for antiphospholipid syndrome (APS). Compared to aCL IgG, isolated and low levels aCL IgM antibodies have a very low risk for APS and should be interpreted with a high degree of suspicion.(Principal Investigators are listed in alphabetical order by last name) Principal Investigator Institution Project Title/Research Areas Animesh Barua, Ph.D. Rush University Medical...Introduction. Because of decreased levels of IgG in the blood and normal or elevated levels of IgM, most individuals with hyper IgM syndrome (HIGM) are susceptible to recurrent and severe infections, including opportunistic infections, which are infections by organisms that do not normally infect healthy individuals, and are susceptible to an increased risk of …Unusually for immunoglobulin, IgA activates complement by the alternative pathway. In brief (adults): High IgA (>4g/L) elevated IgA levels are nonspecific, but can be seen in pulmonary and gastrointestinal inflammatory diseases, some autoimmune conditions, liver disease, and plasma cell disorders; Low IgA (<0.8g/L)The gamma globulin band as seen in conventional serum protein electrophoresis consists of 5 immunoglobulins. In normal serum, about 5% is IgM. Elevations of IgM may be due to polyclonal immunoglobulin production. Monoclonal elevations of IgM occur in macroglobulinemia.Immunoglobulin G (IgG), quantified in serum and expressed in quantitative terms, is a fundamental marker in immunology and a predominant antibody class in the body's immune response. Representing about 75% of serum antibodies in humans, IgG plays a critical role in identifying and neutralizing foreign pathogens like bacteria and viruses .14 Citations. 6 Altmetric. Metrics. Abstract. Numerous studies have reported expressions of immunoglobulins (Igs) in many human tumor tissues and cells. Tumor …This test measures the amount of free kappa and light chains in the blood to help detect, diagnose, and monitor conditions associated with an increased production of free light chains. Each type of immunoglobulin is composed of four protein chains: 2 identical heavy chains and 2 identical light chains. A particular plasma cell will produce only ...You have IgA antibodies in your blood, saliva, and gastric "juices." An immunoglobulins blood test measures the amounts of IgM, IgG, and IgA in your blood to help diagnose different types of health conditions that may affect your immune system. Other names: quantitative immunoglobulins, total immunoglobulins, IgG, IgM, IgA testing.Abstract. Traditionally, immunoglobulin (Ig) was believed to be produced by only B-lineage cells. However, increasing evidence has revealed a high level of Ig expression in cancer cells, and this Ig is named cancer-derived Ig.What is the Significance of the Immunoglobulin A Blood Test Result? The interpretation of the Immunoglobulin A Blood Test value depends on the age of the individual. The normal range for the IgA Blood Test is as follows: 0-30 days: 1-7 mg/dL. 1-2 months: 1-53 mg/dL. 2-4 months: 3-47 mg/dL. 4-5 months: 4-72 mg/dL.McPherson’s group showed that serum IgA was elevated in NASH patients as compared with simple steatosis patients . In these studies, serum IgA …weight loss. bruises or other skin lesions. blurred vision. swelling of the lymph nodes, spleen, or liver. This test alone cannot be used to make a diagnosis. The test only indicates whether ...Immunoglobulins are proteins that function as antibodies, which fight infection. There are many types of immunoglobulins that fight different types of infections. Some immunoglobulins can be abnormal and may be due to cancer. Alternative Names. Serum immunofixation How the Test is Performed. A blood sample is needed. How to …If you have cancer, particularly a cancer that affects the blood, lymph tissue, or bone marrow, such as multiple myeloma, IgG levels may be affected, as these are considered immune system cancers. As these cancers go on, “immunoglobulin levels may decrease over time, even without cancer treatment, just as part of the body’s overall response ...Unlike specific tests, total IgE blood test has limited diagnostic value. Many different factors can cause high/low levels, but most healthy individuals will be in the range of 2-150 kU/L. High IgE may be associated with higher rates of cataracts and diabetes and lower rates of brain and blood cancer.IgA nephropathy (nuh-FROP-uh-thee), also known as Berger disease, is a kidney disease. It happens when a germ-fighting protein called immunoglobulin A (IgA) builds up in the kidneys. This causes a type of swelling called inflammation that, over time, can make it harder for the kidneys to filter waste from the blood.Aug 3, 2023 · In our chart review, 848 patients were identified, 85 (10.0%) of whom were found to be negative for celiac disease but had elevated total serum IgA levels (median IgA 351 mg/dL, interquartile range 324–382). Out of 85 patients, 73 were further evaluated by immunologists, with 55 patients undergoing additional laboratory workup. In our chart review, 848 patients were identified, 85 (10.0%) of whom were found to be negative for celiac disease but had elevated total serum IgA levels (median IgA 351 mg/dL, interquartile range 324–382). Out of 85 patients, 73 were further evaluated by immunologists, with 55 patients undergoing additional laboratory workup.If your immunoglobulin levels are too high, it may be a sign of an autoimmune disease, a chronic illness, an infection, or a type of cancer. Symptoms of these conditions vary greatly. Your health care provider may use information from your physical exam, medical history, and/or other tests to see if you are at risk for one of these diseases. Immunoglobulin A (IgA), Serum. Useful For. Detection or monitoring of IgA monoclonal gammopathies and IgA-related immune deficiencies. Testing Algorithm. The following algorithms are available: - Celiac Disease Comprehensive Cascade Test Algorithm. - Celiac Disease Diagnostic Testing Algorithm. - Celiac Disease Gluten-Free Cascade Test Algorithm. Some medical treatments for cancer, including radiation of the head and neck or chemotherapy, can cause changes to the way in which food tastes and smells while also making people ...If your immunoglobulin levels are too high, it may be a sign of an autoimmune disease, a chronic illness, an infection, or a type of cancer. Symptoms of these conditions vary …Hypergammaglobulinemia (polyclonal gammopathy) refers to the overproduction of more than one class of immunoglobulins by plasma cells. It is most commonly associated with liver disease, acute or chronic inflammation, autoimmune disorders, and some malignancies.What is the Significance of the Immunoglobulin A Blood Test Result? The interpretation of the Immunoglobulin A Blood Test value depends on the age of the individual. The normal range for the IgA Blood Test is as follows: 0-30 days: 1-7 mg/dL. 1-2 months: 1-53 mg/dL. 2-4 months: 3-47 mg/dL. 4-5 months: 4-72 mg/dL.His draft treaty addresses the shortcomings of global vaccine production and rollout. India’s largest vaccine maker is pitching for vaccine equity with an eye on the next pandemic....Key points about IgA nephropathy. IgA nephropathy is a disease in which IgA protein builds up in and damages the filtering part of the kidney (glomerulus). The damage may cause few or no symptoms. Blood in the urine is the most common symptom. The condition is diagnosed by blood and urine tests. Kidney biopsy may also be needed.Mar 12, 2019 · Objective. Currently, no satisfactory targets for colorectal cancer or markers for immunotherapy and diagnosis and prognosis are available. Immunoglobulin G (IgG) is widely expressed in many cancers, and it promotes cancer progression. This study explored the role of cancer-derived IgG (CIgG) in colorectal cancer. An immunoglobulin test checks the amount of certain antibodies in your body. IgA is one of the types of antibodies that protects you against infections in the lungs, sinuses, stomach, and intestines. A high IgA level can indicate cancer, such as multiple myeloma, lymphoma, or leukemia. Learn more about the types of immunoglobulin, why you might need this test, how it's done, and what your results mean.Immunoglobulin A (IgA) is a type of antibody. Antibodies are proteins of the immune system that bind to and neutralize pathogens such as bacteria and viruses . IgA is one of the five immunoglobulin classes (in addition to IgG, IgM, IgD, and IgE) . In the human body, more IgA is produced per day than all other antibodies combined [2, 3, 1].In our chart review, 848 patients were identified, 85 (10.0%) of whom were found to be negative for celiac disease but had elevated total serum IgA levels (median IgA 351 mg/dL, interquartile range 324-382). Out of 85 patients, 73 were further evaluated by immunologists, with 55 patients undergoing additional laboratory workup.2) Avoiding Alcohol. Blood IgA levels tend to increase with alcohol consumption. In 460 people, the highest IgA levels were observed in heavy drinkers [ 3 ]. White wine increased blood IgA in 5 men [ 4 ]. However, while blood IgA increases, gut IgA may actually decrease with alcohol. In mice, alcohol increased total IgA but decreased gut IgA.Previous studies have shown that elevated serum levels of anti-H. pylori IgA is a sensitive indicator of gastric cancer risk [16, 17]. To determine the influence of humoral immune responses against H. pylori infection on gastric carcinoma, we assessed the presence of anti- H. pylori IgG and IgA levels in gastric adenocarcinoma patients and non ...Mean serum levels of IgG in oral precancer were 1,430.87 ( ± 316) mg/dL, oral cancers were 1,234.27 ( ± 365.42) mg/dL, and controls were 593.87 ( ± 323.06) …Oct 24, 2023 · If you have cancer, particularly a cancer that affects the blood, lymph tissue, or bone marrow, such as multiple myeloma, IgG levels may be affected, as these are considered immune system cancers. As these cancers go on, “immunoglobulin levels may decrease over time, even without cancer treatment, just as part of the body’s overall response ... Nov 21, 2015 · Previous studies have shown that elevated serum levels of anti-H. pylori IgA is a sensitive indicator of gastric cancer risk [16, 17]. To determine the influence of humoral immune responses against H. pylori infection on gastric carcinoma, we assessed the presence of anti- H. pylori IgG and IgA levels in gastric adenocarcinoma patients and non ... Feb 16, 2024 · Elevated IgA “could indicate an infection,” Dr. Kin said. “Very high levels would be concerning for cancer.” High IgA is often seen in patients with multiple myeloma. In these cases, the high IgA results from abnormal immune cells producing excess amounts of the protein. Other potential high IgA level causes include: Liver disease The work-up for IgG subclass deficiency should start with determination of serum immunoglobulin concentrations (IgG, IgM, and IgA). It is very important to interpret these results using age ...Elevated IgA “could indicate an infection,” Dr. Kin said. “Very high levels would be concerning for cancer.” High IgA is often seen in patients with multiple myeloma. In these cases, the high IgA results from abnormal immune cells producing excess amounts of the protein. Other potential high IgA level causes include: Liver diseaseThe levels of IgG, IgA and IgM were followed in 93 patients with metastases of various tumors in the liver, bones, lymph nodes, lungs and with the generalization of tumor in multiple organs. ... Serum immunoglobulin levels in cancer patients. III. Immunoglobulin levels and metastases of malignant tumors Neoplasma. 1977;24:177-91. AuthorsAn example of an abnormal Ig is monoclonal protein, or M protein. The immunoelectrophoresis-serum test (IEP-serum) is a blood test used to measure the types of Ig present in your blood, especially ...Aug 7, 2019 · What is the Significance of the Immunoglobulin A Blood Test Result? The interpretation of the Immunoglobulin A Blood Test value depends on the age of the individual. The normal range for the IgA Blood Test is as follows: 0-30 days: 1-7 mg/dL. 1-2 months: 1-53 mg/dL. 2-4 months: 3-47 mg/dL. 4-5 months: 4-72 mg/dL. Abstract. Traditionally, immunoglobulin (Ig) was believed to be produced by only B-lineage cells. However, increasing evidence has revealed a high level of Ig expression in cancer cells, and this Ig is named cancer-derived Ig.Immunoglobulin A (IgA) is an antibody blood protein that’s part of your immune system. Your body makes IgA and other type of antibodies to help fight off sickness. Having an …See list of participating sites @NCIPrevention @NCISymptomMgmt @NCICastle The National Cancer Institute NCI Division of Cancer Prevention DCP Home Contact DCP Policies Disclaimer P...What is the Significance of the Immunoglobulin A Blood Test Result? The interpretation of the Immunoglobulin A Blood Test value depends on the age of the individual. The normal range for the IgA Blood Test is as follows: 0-30 days: 1-7 mg/dL. 1-2 months: 1-53 mg/dL. 2-4 months: 3-47 mg/dL. 4-5 months: 4-72 mg/dL.An immunofixation blood test, also known as protein electrophoresis, measures certain proteins in the blood. Proteins play many important roles, including providing energy for the body, rebuilding muscles, and supporting the immune system. There are two main types of proteins in the blood: albumin and globulin.Immunoglobulin G (IgG), quantified in serum and expressed in quantitative terms, is a fundamental marker in immunology and a predominant antibody class in the body's immune response. Representing about 75% of serum antibodies in humans, IgG plays a critical role in identifying and neutralizing foreign pathogens like bacteria and viruses .Immunoglobulin G, Qn, Serum. Optimal Result: 586 - 1602 mg/dL. Interpret your laboratory results now. Immunoglobulin G (IgG), quantified in serum and expressed in quantitative terms, is a fundamental marker in immunology and a predominant antibody class in the body's immune response. Representing about 75% of serum antibodies in humans, IgG ...Mean serum levels of IgG in oral precancer were 1,430.87 ( ± 316) mg/dL, oral cancers were 1,234.27 ( ± 365.42) mg/dL, and controls were 593.87 ( ± 323.06) …If your immunoglobulin levels are too high, it may be a sign of an autoimmune disease, a chronic illness, an infection, or a type of cancer.. What is normal immunoglobulin A QN serum? Clinical Information. In normal serum, about 80% is immunoglobulin G (IgG), 15% is immunoglobulin A (IgA), 5% is immunoglobulin M …The serum immunofixation test is most often done with a blood sample. . In some cases, the test is done with a urine sample. These tests are performed when the IFE blood test doesn't give ...The latest research on Serum Sodium (Na) Outcomes. Expert analysis on potential benefits, dosage, side effects, and more. Sodium is an electrolyte, an essential mineral that carrie...It can also be the result of a hyperimmunization reaction. If the IgA blood test results are high, but other immunoglobulin testing results are normal, then this can be an indication that multiple myeloma, leukemia, or lymphoma has developed. If the IgA blood test results are low, then this can be an indication that kidney failure has occurred.IgM is the class that appears initially when an organism is exposed to an antigen for the first time (primary infection). IgA is the major immunoglobulin class found in mucosal secretions and prevents mucosal infections by agglutinating microbes. 8 IgG is the predominant immunoglobulin in normal serum (70–75%, ∼1,000 mg/dL).Online Primary Care Doctors Accepting New Patients. $44 video appointments available today with a membership as low as $15/month. hi i had bloodwork and im confused with an abnormal result. my immunoglobulin a, qn serum was high. supposed to be 87-352 and mine was 524. ?: Maybe nothing: The level at less than 2X upper normal might be associa.The Immunoglobulin M test is carried out using a blood sample which is collected by the process of venipuncture. The procedure is as follows: – A tourniquet is wrapped around the upper arm to make the veins more prominent. – A syringe or needle is used to draw blood by puncturing the vein. The blood is drawn into the tube of the syringe. Selective IgA deficiency, sometimes called SIgAD, refers to an often-inherited blood condition that results from something lacking in the immune system. In this case, it's immunoglobulin A (IgA), which provides protection against infections in the membranes of the body. Contents Overview Symptoms and Causes Diagnosis and Tests Management and ... The normal range for thyroglobulin is: 1.40 – 29.2 ng/mL (μg/L) for men. 1.50 – 38.5 ng/mL for women. In countries where iodine deficiency is common (not the US), the reference range may be higher [ 5, 6, 7 ]. Women tend to have slightly higher thyroglobulin levels than men [ 8 ].In a new study published in Annals of Oncology, Prof. Børge G. Nordestgaard, from the department of clinical biochemistry at Copenhagen University Hospital in Denmark, and colleagues studied whether high levels of plasma total IgE are associated with overall risk of cancer – and specifically whether they were associated with the lymphoid ...There are more than 100 different types of cancer. The most common cancer types are breast cancer, lung cancer and prostate cancer. Written by a GP. Try our Symptom Checker Got any...What is the Significance of the Immunoglobulin A Blood Test Result? The interpretation of the Immunoglobulin A Blood Test value depends on the age of the individual. The normal range for the IgA Blood Test is as follows: 0-30 days: 1-7 mg/dL. 1-2 months: 1-53 mg/dL. 2-4 months: 3-47 mg/dL. 4-5 months: 4-72 mg/dL.Interestingly, during the synthesis of all immunoglobulins, normal plasma cells produce a slight excess of kappa ( κ) and lambda ( λ) light chains over heavy chains. These small amounts are released into the serum as free kappa or lambda light chains (FLCs) (3.3–19.4 and 5.7–26.6 mg/L, respectively).Serum IgA and IgG (but not IgM) tended to increase in parallel with these categories of serum IL-6 levels (P for trend = 0·01, 0·03 and 0·59, respectively) (Fig. 5). No clear-cut associations were observed between IL-6 levels and sex, alcohol consumption, smoking or any of the common metabolic abnormalities studied (data not shown).Abstract. Traditionally, immunoglobulin (Ig) was believed to be produced by only B-lineage cells. However, increasing evidence has revealed a high level of Ig …Outlook. Takeaway. Multiple myeloma is a blood cancer that affects plasma cells. In light chain myeloma, cancerous plasma cells create a specific type of immunoglobulin known as light chains ...Clinically, serum immunoglobulin levels are frequently increased in patients with cirrhosis, and the elevation of a specific class of serum immunoglobulin is associated with a distinct liver disease. For example, elevated IgM is correlated with primary biliary cirrhosis, elevated IgG with autoimmune hepatitis, and elevated IgA in …Immunoglobulin M (IgM), which is found mainly in the blood and lymph fluid, is the first antibody to be made by the body to fight a new infection. Expressed on the surface of B cells (monomer) and in a secreted form (pentamer) with very high avidity (forms multiple binding sites with antigen).Biopsies may be avoided in children with high immunoglobulin A tissue transglutaminase (i.e., 10 times the upper limit of normal or more) and a positive test for immunoglobulin A endomysial ...Intravenous immune globulin (IVIG) consists of human antibodies, and it is given through a vein. If someone with cancer has chronic infections and their IgG levels are persistently low, below 500-600 mg/dL, there may be a benefit from low-dose IVIG replacement therapy. Dr.
Polyclonal gammopathy, also called hypergammaglobulinemia, happens when your immune system makes too many immunoglobulins (antibodies). These extra antibodies show that your immune system is working too hard. Your healthcare provider treats the condition that’s causing your immune system to produce too many antibodies. Medically Reviewed.. Juice wrld tattoo
Biopsies may be avoided in children with high immunoglobulin A tissue transglutaminase (i.e., 10 times the upper limit of normal or more) and a positive test for immunoglobulin A endomysial ...What would cause free kappa &free lamba to be high but ratio normal also Immunoglobulin M, Qn, Serum high. platelets steady rising & WBC high for 1yr? 2 doctors weighed in across 2 answers A member asked:Feb 29, 2024 · Here’s a look at immunoglobulin tests and what a low or high score could indicate. Reference ranges are based on the 2.5th and 97.5th percentiles. Each laboratory establishes its own reference ... 1. Introduction. High IgM levels are found in rare immunological disorders, such as hyper IgM (HIGM) syndromes, but also in autoimmune or acquired infectious diseases [1,2,3].Elevated monoclonal IgM levels are also found in B-cell lymphoproliferative disorders (LPD) [4,5].HIGM syndromes are characterized by normal or increased IgM …Elevated IgA “could indicate an infection,” Dr. Kin said. “Very high levels would be concerning for cancer.” High IgA is often seen in patients with multiple myeloma. In these cases, the high IgA results from abnormal immune cells producing excess amounts of the protein. Other potential high IgA level causes include: Liver diseaseThe Immunoglobulin Test or IgA test measures the amount of IgA antibodies in the blood. The IgA test can also be used for the screening of some autoimmune disorders and cancers. However, IgA tests are not too specific meaning they cannot pinpoint the cause of the IgA level fluctuations and is only used to assess the levels of antibodies and ...Plasma cells are protein-making cells participating in humoral immune responses against bacteria, viruses, fungi, parasites, cellular antigens, chemicals, and synthetic substances. [1] Immunoglobulins constitute about 20% of the protein in plasma. The immunogen or antigen reacts with a B-cell receptor (BCR) on the cell surface of B …The Poonawallas' Serum Institute of India is the world's largest vaccine maker, and is licensed to produce the Oxford-AstraZeneca shot. The Serum Institute of India (SII), headed b...Clinical Information. The gamma globulin band as seen in conventional serum protein electrophoresis consists of 5 immunoglobulins. In normal serum, about 15% is IgA. Monoclonal gammopathies of all types may lead to a spike in the gamma globulin zone seen on serum protein electrophoresis. Monoclonal elevations of IgA characterize multiple myeloma.1. Infections (either invasive or recurrent, usually bacterial) AND Low IgM serum or plasma level (with normal IgG, IgG subclasses, and IgA plasma level). AND Normal IgG antibody response to all vaccinations. AND Exclusion of T cell defect and other monogenic PID. 2. SIgMD can present as a primary or secondary condition. Accordingly, the primary …Abstract. Immunoglobulin A (IgA) is a major immunoglobulin isotype in the gut and plays a role in maintenance of gut homeostasis. Secretory IgA (SIgA) has multiple functions in the gut, such as to regulate microbiota composition, to protect intestinal epithelium from pathogenic microorganisms, and to help for immune-system development.Hyper IgM syndromes are caused by very rare, one-in-a-million, and potentially life-threatening genetic mutations that severely compromise the immune system and resulting in the individual’s inability to produce antibodies. Patients with hyper IgM are at significant risk for opportunistic and repeated infections. Advertisements.Immunoglobulin G (IgG), quantified in serum and expressed in quantitative terms, is a fundamental marker in immunology and a predominant antibody class in the body's immune response. Representing about 75% of serum antibodies in humans, IgG plays a critical role in identifying and neutralizing foreign pathogens like bacteria and viruses .It also provides a measure of the concentration of the major immunoglobulin types in the blood, including IgG, IgA, and IgM. The serum free light chain assay provides the concentration of the two light chains that are found in the body — the kappa and lambda light chains — and the ratio between these light chains.According to the American Cancer Society, kidney cancer is among the 10 most common cancers in the U.S. The observed five-year survival rate of people who are diagnosed with kidney... Key points about IgA nephropathy. IgA nephropathy is a disease in which IgA protein builds up in and damages the filtering part of the kidney (glomerulus). The damage may cause few or no symptoms. Blood in the urine is the most common symptom. The condition is diagnosed by blood and urine tests. Kidney biopsy may also be needed. Immunoglobulin A (IgA) is an antibody blood protein that’s part of your immune system. Your body makes IgA and other type of antibodies to help fight off sickness. Having an IgA deficiency means that you have low levels of or no IgA in your blood. IgA is found in mucous membranes, mainly in the respiratory and digestive tracts.Dec 15, 2007 · Serum IgA tTG levels typically decrease as patients maintain a glutenfree diet. Celiac disease (or celiac sprue) is an autoimmune disorder with a prevalence of approximately 0.5 to 1 percent in ... .