Thyroid-stimulating hormone is a peptide hormone synthesized and secreted by thyrotrope cells in the anterior pituitary gland, which regulates the endocrine function of the thyroid gland. TSH stimulates the thyroid gland to secrete the hormones thyroxine (T4) and triiodothyronine (T3). TSH production is controlled by thyrotropin-releasing hormone (TRH), which is manufactured in the hypothalamus. Description: Human platelets. Alternative Names: Thyroid Stimulation Hormone protein, Thyroid Stimulating Hormone protein