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Autoantibodies in Patients With Type 1 Diabetes Mellitus

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified August 2005 by National Taiwan University Hospital.
Recruitment status was:  Recruiting
Information provided by:
National Taiwan University Hospital Identifier:
First received: September 12, 2005
Last updated: December 20, 2005
Last verified: August 2005
Evaluate the autoantibodies, such as glutamic acid decarboxylase (GAD65), tyrosine phosphatase (IA-2 or ICA125), islet autoantibodies (IAA) and other associated autoimmune autoantibodies: microsomal antibodies, thyroglobulin antibodies, gastric parietal cell antibodies in patients with type 1 DM.

Condition Intervention
Type 1 Diabetes Procedure: blood drawing

Study Type: Observational
Study Design: Observational Model: Defined Population
Observational Model: Natural History
Time Perspective: Longitudinal
Time Perspective: Retrospective/Prospective

Resource links provided by NLM:

Further study details as provided by National Taiwan University Hospital:

Estimated Enrollment: 150
Study Start Date: January 1990
Estimated Study Completion Date: December 2006
Detailed Description:

Type 1 diabetes mellitus (DM) is a common disease in pediatric endocrine clinic and epidemiological studies showed the racial variation in the incidence, with the highest of 35 cases per 100000 in Finland. The incidence of type 1 DM in Taiwan is reported to be 1.5 per 100000 for the population less than 30 years old. While the diagnosis is made, the residual islet cell function is only about 20% of normal population. Therefore, the principle therapy in these patients is insulin therapy lifelong.

The pathogenesis of type 1 diabetes mellitus is multifactorial and controversial, involving the genetic and environmental factors. Type 1 DM is an autoimmune disease, which is T cell mediated islet cell destruction. Ninety percent of patients with type 1 DM express at least one of the autoantibodies to the islet. Antibodies to glutamic acid decarboxylase 65 (GAD65) were observed in 60-80% of such patients, which were considered the most important autoantigens. The autoantibodies disappeared successively after diagnosis and decreased in concentrations over time, but titers of antibodies to GAD65 had been observed fluctuated in patients with type 1 DM.

The prevalence of GAD antibodies, insulin autoantibodies, IA-2 (tyrosine phosphatase) were reported as 45-67%, 23-67% and 49%, respectively in Taiwan. Other associated autoimmune disease, such as autoimmune thyroiditis were reported as 13-24%. Such differences may be caused by the enrolling criteria and different age population. Therefore, we want to elucidate the role of autoantibodies in the pathogenesis of type 1 DM.


Ages Eligible for Study:   up to 20 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • pediatric patients with type 1 diabetes
  Contacts and Locations
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Please refer to this study by its identifier: NCT00173628

Contact: Yi-Ching Tung, MD 886-2-23123456 ext 5130

National Taiwan University Hospital Recruiting
Taipei, Taiwan
Contact: Yi-Ching Tung, MD    886-2-23123456 ext 5130   
Sponsors and Collaborators
National Taiwan University Hospital
Principal Investigator: Yi-Ching Tung, MD National Taiwan University Hospital
  More Information Identifier: NCT00173628     History of Changes
Other Study ID Numbers: 9461700824
Study First Received: September 12, 2005
Last Updated: December 20, 2005

Additional relevant MeSH terms:
Diabetes Mellitus, Type 1
Diabetes Mellitus
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Autoimmune Diseases
Immune System Diseases processed this record on August 18, 2017