thyroid-stimulating immunoglobulinmedical dictionary

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These are antibodies produced by B-lymphocytes that stimulate receptors within the thyroid gland to produce the secretion of thyroxine, causing hyperthyroidism.

This can be measured within serum as a blood test, that determines the amount of an antibody (thyroid-stimulating antibody). This antibody acts like TSH and stimulates the thyroid to produce excessive amounts of thyroid hormone and the presence of this antibody generally indicates Grave's disease.

Thyroid hormones are essential for the function of every cell in the body. They help regulate growth and the rate of chemical reactions (metabolism) in the body.

Synonyms: LATS, long-acting thyroid stimulator.

(09 Jun 2009)