Sodium/hydrogen exchanger gene defect in slow-wave epilepsy mutant mice

  • Gregory A. Cox
  • , Cathleen M. Lutz
  • , Chao Ling Yang
  • , Daniel Biemesderfer
  • , Roderick T. Bronson
  • , Audrey Fu
  • , Peter S. Aronson
  • , Jeffrey L. Noebels
  • , Wayne N. Frankel

Research output: Contribution to journalArticlepeer-review

247 Scopus citations

Abstract

The 'housekeeping' sodium/hydrogen exchanger, NHE1, mediates the electroneutral 1:1 exchange of Na+ and H+ across the plasma membrane. NHE1 is ubiquitous and is studied extensively for regulation of pH(i), cell volume, and response to growth factors. We describe a spontaneous mouse mutant, slow-wave epilepsy, (swe), with a neurological syndrome including ataxis and a unique epilepsy phenotype consisting of 3/sec absence and tonic- clonic seizures. swe was fine-mapped on chromosome 4 and identified as a null allele of Nhe1. Mutants show selective neuronal death in the cerebellum and brainstem but otherwise are healthy. This first example of a disease-causing mutation in an Nhe gene provides a new tool for studying the delicate balance of neuroexcitability and cell survival within the CNS.

Original languageEnglish
Pages (from-to)139-148
Number of pages10
JournalCell
Volume91
Issue number1
DOIs
StatePublished - 3 Oct 1997
Externally publishedYes

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