Gliadin (Deamidated Peptide) Antibody (IgG, IgA)
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The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.
Also known as: ,Gliadin (IgA, IgG), Anti-Gliadin Ab (IgA, IgG), Antigliadin Ab (IgA, , Deamidated Gliadin (IgA, Deamidated Gliadin (IgA, IgG), DGP (IgA, IgG), Gliadin Deamidated Peptide Antibody IgG IgA
Gliadin (Deamidated)
Gliadin (Deamidated)
The Gliadin (Deamidated Peptide) Antibody (IgG, IgA) test contains 1 test with 2 biomarkers.
Brief Description: The Gliadin IgG IgA Antibodies test is a diagnostic tool used to detect the presence of specific antibodies in the blood that react with gliadin, a protein found in gluten. This test is primarily associated with the evaluation of celiac disease, a chronic autoimmune disorder triggered by gluten consumption.
Collection Method: Blood Draw
Specimen Type: Serum
Test Preparation: No preparation required
When and Why the Test May Be Ordered:
This test is ordered when there is suspicion of celiac disease, especially in individuals who exhibit symptoms like chronic diarrhea, abdominal pain, bloating, fatigue, and weight loss. It's also used for individuals at risk due to a family history of celiac disease or those with conditions linked to gluten sensitivity.
What the Test Checks For:
The Gliadin IgG IgA Antibodies test checks for the presence of immunoglobulin G (IgG) and immunoglobulin A (IgA) antibodies that react with gliadin. Elevated levels of these antibodies indicate an immune response to gluten, which is a hallmark of celiac disease. IgG antibodies reflect a delayed immune response, while IgA antibodies are associated with an immediate immune response.
Other Lab Tests That May Be Ordered Alongside:
When a Gliadin Deamidated Peptide Antibody test is ordered, it's often part of a broader assessment for celiac disease and related gastrointestinal conditions. Here are some tests commonly ordered alongside it:
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Tissue Transglutaminase Antibody (tTG-IgA):
- Purpose: To test for antibodies against tissue transglutaminase, which are highly specific for celiac disease.
- Why Is It Ordered: tTG-IgA is considered the primary screening test for celiac disease, often used in conjunction with deamidated gliadin peptide tests for more accurate diagnosis.
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- Purpose: To measure the level of Immunoglobulin A (IgA) in the blood.
- Why Is It Ordered: To check for IgA deficiency, which can lead to false-negative results in IgA-based celiac disease tests.
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Endomysial Antibody (EMA) IgA:
- Purpose: To detect antibodies that target the endomysium in the intestine, associated with celiac disease.
- Why Is It Ordered: EMA IgA testing is highly specific for celiac disease and is often used to confirm positive results from other celiac-related tests.
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- Purpose: To evaluate overall blood health.
- Why Is It Ordered: To check for signs of anemia or other blood cell abnormalities often associated with celiac disease due to malabsorption.
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Serum Iron, Ferritin, and Folate Levels:
- Purpose: To assess levels of iron, ferritin (an iron storage protein), and folate.
- Why Is It Ordered: To evaluate for deficiencies common in celiac disease due to malabsorption in the damaged small intestine.
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- Purpose: To measure the level of vitamin B12 in the blood.
- Why Is It Ordered: Like iron and folate, vitamin B12 can be malabsorbed in celiac disease, leading to deficiency.
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- Purpose: To assess liver health.
- Why Is It Ordered: To evaluate liver function, as celiac disease can sometimes be associated with liver enzyme abnormalities.
These tests, when ordered alongside a Gliadin Deamidated Peptide Antibody test, provide a comprehensive assessment of the potential presence of celiac disease and its effects on the body. They are crucial for diagnosing celiac disease, understanding its impact on the patient's health, and guiding dietary and treatment strategies. The specific combination of tests will depend on the individual’s symptoms, medical history, and risk factors.
Conditions or Diseases Requiring the Test:
- Celiac Disease: The primary condition requiring this test is celiac disease, an autoimmune disorder triggered by the consumption of gluten-containing foods.
- Gluten Sensitivity: Individuals with non-celiac gluten sensitivity may also exhibit elevated gliadin antibodies, although the clinical implications are different from celiac disease.
How Health Care Providers Use the Results:
- Diagnosis: Elevated levels of Gliadin IgG and IgA antibodies, especially when confirmed by other tests, can contribute to diagnosing celiac disease.
- Treatment Planning: A positive test result guides healthcare providers in recommending a gluten-free diet, which is the main treatment for celiac disease.
- Monitoring: The test may be repeated after initiating a gluten-free diet to monitor antibody levels and assess treatment effectiveness.
- Risk Assessment: For individuals at risk due to family history, a positive test result might indicate the need for further evaluation and follow-up.
In summary, the Gliadin IgG IgA Antibodies test is a crucial tool for diagnosing celiac disease and assessing gluten sensitivity. By detecting specific antibodies reacting with gliadin, healthcare providers can identify individuals who require a gluten-free diet for managing their condition. The results of this test, along with other relevant tests, guide treatment decisions and ongoing monitoring of the disease.
Most Common Questions About the Gliadin IgG IgA Antibodies test:
Clinical Utility and Interpretation of the Gliadin IgG IgA Antibodies Test
What is the Gliadin IgG IgA Antibodies test and why is it used?
The Gliadin IgG IgA Antibodies test is used to detect the presence of antibodies against gliadin, a component of gluten. It is commonly utilized to assist in the diagnosis of celiac disease, an autoimmune disorder triggered by gluten ingestion in genetically predisposed individuals.
What do the results of the Gliadin IgG IgA Antibodies test mean?
A positive result for the Gliadin IgG IgA Antibodies test may indicate an immune response to gluten, often associated with celiac disease. Conversely, a negative result typically suggests the absence of celiac disease, though it doesn’t completely rule it out.
How does the Gliadin IgG IgA Antibodies test differ from other tests used in diagnosing celiac disease?
The Gliadin IgG IgA Antibodies test is one of several tests for celiac disease. It is considered less specific than tests for antibodies against tissue transglutaminase (tTG) or endomysium (EMA). Combining these tests may provide a more comprehensive diagnosis.
Clinical Applications of the Gliadin IgG IgA Antibodies Test
How does the Gliadin IgG IgA Antibodies test contribute to the overall management of celiac disease?
This test helps in the diagnosis of celiac disease, guiding dietary interventions (e.g., gluten-free diet) and follow-up care. It may also be used to monitor adherence to a gluten-free diet.
In what cases might a healthcare provider recommend the Gliadin IgG IgA Antibodies test?
A healthcare provider might recommend this test if a patient presents with symptoms suggestive of celiac disease, such as diarrhea, weight loss, or abdominal pain, or in individuals with a family history of celiac disease or related autoimmune disorders.
Clinical Limitations and Context of the Gliadin IgG IgA Antibodies Test
What are the diagnostic criteria for celiac disease, and how does the Gliadin IgG IgA Antibodies test fit within these criteria?
The diagnosis of celiac disease typically involves a combination of serological tests, including the Gliadin IgG IgA Antibodies test, along with clinical symptoms and intestinal biopsy. The test alone is not definitive but contributes to a broader diagnostic picture.
What are the criteria for a patient to be re-tested with the Gliadin IgG IgA Antibodies test after initial testing?
Re-testing with the Gliadin IgG IgA Antibodies test might occur if there are ongoing or recurring symptoms despite a negative initial test or if there are inconsistencies between serological results and other diagnostic findings such as biopsy.
Understanding the Relationship Between Gliadin, Gluten, and Celiac Disease
What is gliadin, and why are antibodies against gliadin significant in the Gliadin IgG IgA Antibodies test?
Gliadin is a protein component of gluten found in wheat and related grains. In celiac disease, ingestion of gliadin triggers an immune response, resulting in the production of IgG and IgA antibodies against gliadin, which the test detects.
How does the Gliadin IgG IgA Antibodies test fit into the broader context of gluten-related disorders?
The test helps in the diagnosis of celiac disease but is not specific to other gluten-related disorders like non-celiac gluten sensitivity (NCGS). A comprehensive evaluation is often needed for accurate diagnosis and differentiation.
Comparative Insights of the Gliadin IgG IgA Antibodies Test
How does the Gliadin IgG IgA Antibodies test compare to other serological tests for celiac disease in terms of sensitivity and specificity?
Compared to other serological tests for celiac disease, the Gliadin IgG IgA Antibodies test may be less sensitive and specific. It might yield more false-positive results, especially in IgA deficiency, thus often used in conjunction with other tests.
We advise having your results reviewed by a licensed medical healthcare professional for proper interpretation of your results.