Author:
S. Khan Mosin,S. Lone Suhail,Faiz Sunia,Farooq Iqra,Majid Sabhiya
Abstract
Graves’ disease is an autoimmune disorder in which hyperthyroidism (over active thyroid) is caused by the autoantibodies against the TSH receptor. It is mainly characterized by the appearance of goiter. The symptoms are wide ranging as thyroid hormone affects many body systems. It is common in women and in people with age below than 40. Graves’ disease is caused by a combination of genetic and environmental factors while genetics being the main cause. Graves’ disease is not a single gene defect but has a complex pattern of inheritance. Today it is clear that genetic predisposition to Graves’ disease is caused by multiple genes. HLA gene is one the most studied gene predisposing to Graves’ disease. Lot of polymorphisms in this gene has been to be associated with the disease. Lymphoid tyrosine phosphatase encoded by the gene PTPN22 has been found to increase the risk of many autoimmune diseases including Graves’ disease. The best documented association of PTPN22 variants to autoimmune disorders including GD is rs2476601 (C1858T). Other genes associated with the risk of GD are thyrotropin receptor (TSHR), thyroglobulin gene, FCRL3, SCGB3A2, and CTLA4. This chapter will discuss in detail the genetics, pathophysiology, diagnosis and treatment of Graves’ hyperthyroidism.
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