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EAST syndrome information


EAST syndrome
Other namesSeSAME syndrome[1]
Pronunciation
  • /st/

EAST syndrome is a syndrome consisting of epilepsy, ataxia (a movement disorder), sensorineural deafness (deafness because of problems with the hearing nerve) and salt-wasting renal tubulopathy (salt loss caused by kidney problems).[2] The tubulopathy (renal tubule abnormalities) in this condition predispose to hypokalemic (low potassium) metabolic alkalosis with normal blood pressure. Hypomagnesemia (low blood levels of magnesium) may also be present.[citation needed][3]

EAST syndrome is also called SeSAME syndrome,[1] as a syndrome of seizures, sensorineural deafness, ataxia, intellectual disability (mental retardation), and electrolyte imbalances. It is an autosomal recessive genetic disorder caused by mutations in the KCNJ10 gene, as discovered by Bockenhauer and co-workers.[4] The KCNJ10 gene encodes the K+ channel Kir4.1 (allowing K+ to flow into a cell rather than out) and is present in the brain, ear, and kidney.

  1. ^ a b Orphanet, EAST syndrome (ORPHA199343), retrieved 2016-06-23.
  2. ^ OMIM, Seizures, sensorineural deafness, ataxia, mental retardation, and electrolyte imbalance; SeSAMES (OMIM #612780), retrieved 2016-06-23.
  3. ^ Abdelhadi, O.; Iancu, D.; Stanescu, H.; Kleta, R.; Bockenhauer, D. (2016). "EAST syndrome: Clinical, pathophysiological, and genetic aspects of mutations in KCNJ10". Rare Diseases (Austin, Tex.). 4 (1): e1195043. doi:10.1080/21675511.2016.1195043. PMC 4961265. PMID 27500072.
  4. ^ Bockenhauer D, Feather S, Stanescu HC, et al. (May 2009). "Epilepsy, ataxia, sensorineural deafness, tubulopathy, and KCNJ10 mutations". N. Engl. J. Med. 360 (19): 1960–70. doi:10.1056/NEJMoa0810276. PMC 3398803. PMID 19420365.

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