Anti-Tissue Transglutaminase IgA Antibodies

Study Purpose

Celiac disease is the most common genetically related food intolerance, worldwide. It is an immune mediated intolerance to gluten (from wheat, barley, or rye) in genetically susceptible individuals .The disease primarily affects the small intestine, where it progressively leads to flattening of the small intestinal mucosa .

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 1 Year - 18 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - • patients with symptoms suggestive of celiac disease.

Exclusion Criteria:

•chronic active gastrointestinal disease, i.e., irritable bowel syndrome inflammatory bowel disease .

Trial Details

Trial ID:

This trial id was obtained from, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Assiut University
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator Affiliation N/A
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Not yet recruiting

The disease, disorder, syndrome, illness, or injury that is being studied.

Celiac Disease in Children
Additional Details

Within this definition, patients can further be defined as having silent, potential, or latent celiac disease. The term silent celiac disease refers to patients fulfilling the definition above, but presenting no symptoms. Typically, such diagnoses are made by screening asymptomatic individuals, who are at increased risk for celiac disease. The term potential celiac disease describes patients who have specific serum autoantibodies and may or may not have symptoms consistent with celiac disease, but lack evidence of the autoimmune damage to the intestinal mucosa. A final category of celiac patients is represented by the so-called latent celiac disease: individuals with normal mucosal morphology (like the potential) but known to have had a gluten-dependent enteropathy at some point in their life . Malabsorption results from injury to the small intestine with loss of absorptive surface area, reduction of digestive enzymes, and consequential impaired absorption of micronutrients such as fat-soluble vitamins, iron and potentially B12 and folic acid. In addition, the inflammation exacerbates symptoms of malabsorption by causing net secretion of fluid that can result in diarrhea. The failure of absorption of adequate calories leads to weight loss, and the malabsorption results in abdominal pain and bloating . A positive family history is a risk factor for celiac disease. The frequency of celiac disease is higher among first- and second-degree relatives of persons with celiac disease, although prevalence estimates range from 5 to 20 percent . Frequency of celiac disease is also higher among persons with other autoimmune diseases, such as type 1 diabetes mellitus, inflammatory luminal gastrointestinal disorders, Down syndrome, Turner's syndrome, IgA deficiency, and IgA nephropathy . Gastrointestinal and extra-intestinal manifestations of celiac disease include diarrhea, abdominal pain, abdominal distention, anorexia, vomiting, constipation, failure to thrive, chronic fatigue, anemia, osteoporosis, aphthous stomatitis, elevated liver enzymes, joint/muscle pain, epilepsy, and peripheral neuropathy . Clinical practice guidelines recommend to starting with the serum anti-tissue transglutaminase IgA antibodies (anti-tTG IgA) test as a diagnostic testing for celiac disease. The tTG IgA test is the standard method of testing for celiac disease . Clinical practice in guidelines the United States and Europe recommend intestinal biopsy to confirm the diagnosis of celiac disease (e.g., based on presence of villous atrophy hyperplasia of crypts, and increase of intraepithelial lymphocytes) and to distinguish celiac disease from other disorders affecting the small intestine. Intestinal biopsy may also be performed if clinical suspicion for celiac disease is high but serologic tests are negative . It has been suggested that a combination of serologic tests could be used to establish celiac disease diagnosis as an alternative to biopsy, but it is unclear how frequently celiac disease is diagnosed in the absence of biopsy in clinical practice.

Arms & Interventions


: anti-tissue transglutaminase group

serum IgA-tissue transglutaminase antibody (tTG) was analyzed in serum using a quantitative automated ELISA method by means of a commercially available detection kit using recombinant human tTG as antigen recommended cut-off by the manufacturer > 8 U/mL).

: biopsy group

upper gastrointestinal endoscopic examination will be done and the jejunal histopathological examinations will be done at the Histopathology Laboratory. The features consistent with CD included: hyperplasia of crypts, atrophy of villous, and increase of intraepithelial lymphocytes.Duodenal samples will be processed using haematoxylin/eosin staining and CD3 immunophenotyping. The number of intra-epithelial lymphocytes (IEL), the architecture of villi, and the inflammatory cell infiltration of the lamina propria will be assessed. Histopathological changes will be classified according to the Marsh-Oberhuber criteria.Lymphocytic enteropathy (Marsh 1 lesion) was defined as 25 or more IEL per 100 epithelial nuclei, and normal villous architecture.


Diagnostic Test: - anti-tissue transglutaminase group

Determination of anti-tissue transglutaminase IgA antibodies serum level.

Diagnostic Test: - biopsy group

Intestinal biopsy for histopathology study the jejunal histopathological

Contact Information

This trial has no sites locations listed at this time. If you are interested in learning more, you can contact the trial's primary contact:

Naglaa Abu faddan, professor


For additional contact information, you can also visit the trial on

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