Trial record 11 of 17 for:    HLA-DRB1 AND DRB1

Genetic Study of Antithyroid Drugs Associated Agranulocytosis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT01977963
Recruitment Status : Recruiting
First Posted : November 7, 2013
Last Update Posted : November 7, 2013
Information provided by (Responsible Party):
National Taiwan University Hospital

Brief Summary:

Thionamides, the antithyroid drugs, have been widely used to treat hyperthyroidism1. Side effects are found in 1% - 5% of the patients1. One of the most serious side effect is agranulocytosis, which occurs in 0.1% - 0.3 % of the patients1. This might lead to severe infection and sometimes mortality. The underlying mechanism is unclear. An immune phenomenon may be involved because the antigranulocyte antibodies or lymphocyte sensitized to antithyroid drugs are found in these patients6,7. The recognition of major histocompatibility complex class II peptide complexes by T lymphocytes is central to the development of immune response. According to a report in 1996, the HLA DRB1*08032 allele is strongly associated with susceptibility to methimazole-induced agranulocytosis20.

Recently, there are new techniques for genetics study. We aimed to identify the associated genetic change of the agranulocytosis side effect of antithyroid drugs. First, we will look at the classical human Leukocyte Antigen (HLA) loci, such as HLA-A, -B, -C, -DR, -DQ and -DP. If no significant change is found in the above genes, we will consider whole exon sequencing with next-generation sequencing, Statistic analysis will include appropriate linkage analysis, association study, variation data analysis, pathway analysis. If we can identify the genetic change and perform genetic examinations before prescription, we can avoid the happening of severe side effects.

Condition or disease

Study Type : Observational
Estimated Enrollment : 30 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Genetic Study of Antithyroid Drugs Associated Agranulocytosis
Study Start Date : April 2012
Estimated Primary Completion Date : January 2022

Resource links provided by the National Library of Medicine


Primary Outcome Measures :
  1. Number of participants with anti-thyroid drug related agranulocytosis [ Time Frame: within 2 month after taking the drug ]
    The investigators review the chart to see if the patients had anti-thyroid drug related agranulocytosis

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Agranulocytosis caused by anti-thyroid drugs

Inclusion Criteria:

  • patients with absolute neutrophil count lower than 500/mm3 caused by anti-thyroid drugs

Exclusion Criteria:

  • Patients who is younger than 20 years old or older than 85 years old

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01977963

National Taiwan University Hospital Recruiting
Taipei, Taiwan
Contact: Shyang-Rong Shih, PhD    886-972653337   
Principal Investigator: Shyang-Rong Shih, PhD         
Sponsors and Collaborators
National Taiwan University Hospital

Responsible Party: National Taiwan University Hospital Identifier: NCT01977963     History of Changes
Other Study ID Numbers: 201112083RID
First Posted: November 7, 2013    Key Record Dates
Last Update Posted: November 7, 2013
Last Verified: October 2013

Additional relevant MeSH terms:
Leukocyte Disorders
Hematologic Diseases
Antithyroid Agents
Hormone Antagonists
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs