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Mutations in SLC12A5 in epilepsy of infancy with migrating focal seizures
KTH, School of Biotechnology (BIO), Gene Technology. KTH, Centres, Science for Life Laboratory, SciLifeLab.ORCID iD: 0000-0003-4313-1601
Number of Authors: 32
2015 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 6, 8038Article in journal (Refereed) Published
Abstract [en]

The potassium-chloride co-transporter KCC2, encoded by SLC12A5, plays a fundamental role in fast synaptic inhibition by maintaining a hyperpolarizing gradient for chloride ions. KCC2 dysfunction has been implicated in human epilepsy, but to date, no monogenic KCC2-related epilepsy disorders have been described. Here we show recessive loss-of-function SLC12A5 mutations in patients with a severe infantile-onset pharmacoresistant epilepsy syndrome, epilepsy of infancy with migrating focal seizures (EIMFS). Decreased KCC2 surface expression, reduced protein glycosylation and impaired chloride extrusion contribute to loss of KCC2 activity, thereby impairing normal synaptic inhibition and promoting neuronal excitability in this early-onset epileptic encephalopathy.

Place, publisher, year, edition, pages
Macmillan Publishers Ltd., 2015. Vol. 6, 8038
National Category
Clinical Medicine
Identifiers
URN: urn:nbn:se:kth:diva-177681DOI: 10.1038/ncomms9038ISI: 000362945300001PubMedID: 26333769Scopus ID: 2-s2.0-84940846225OAI: oai:DiVA.org:kth-177681DiVA: diva2:874082
Note

QC 20151125

Available from: 2015-11-25 Created: 2015-11-25 Last updated: 2017-12-01Bibliographically approved

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