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Gitelman syndrome : ウィキペディア英語版 | Gitelman syndrome
Gitelman syndrome is an autosomal recessive kidney disorder characterized by hypokalemic metabolic alkalosis with hypocalciuria, and hypomagnesemia. It is caused by loss of function mutations of the thiazide sensitive sodium-chloride symporter (also known as NCC, NCCT, or TSC) located in the distal convoluted tubule. Gitelman syndrome was formerly considered a subset of Bartter syndrome until the distinct genetic and molecular bases of these disorders were identified. Bartter syndrome is also an autosomal recessive hypokalemic metabolic alkalosis, but it derives from a mutation to the NKCC2 found in the thick ascending limb of the loop of Henle. ==Cause==
Gitelman's syndrome is linked to inactivating mutations in the ''SLC12A3'' gene resulting in a loss of function of the encoded thiazide-sensitive sodium-chloride co-transporter (NCCT). This cell membrane protein participates in the control of ion homeostasis at the distal convoluted tubule portion of the nephron. Gitelman's syndrome is an autosomal-recessive disorder: one defective allele has to be inherited from each parent.
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