The Na-K-Cl Co-transporter in astrocyte swelling

Arumugam R. Jayakumar, Michael D. Norenberg

Research output: Contribution to journalArticle

77 Scopus citations

Abstract

Ion channels, exchangers and transporters are known to be involved in cell volume regulation. A disturbance in one or more of these systems may result in loss of ion homeostasis and cell swelling. In particular, activation of the Na+-K+-Cl- cotransporters has been shown to regulate cell volume in many conditions. The Na+-K+-Cl- cotransporters (NKCC) are a class of membrane proteins that transport Na, K, and Cl ions into and out of a wide variety of epithelial and nonepithelial cells. Studies have established the role of NKCC1 in astrocyte swelling/brain edema in ischemia and trauma. Our recent studies suggest that NKCC1 activation is also involved in astrocyte swelling induced by ammonia and in the brain edema in the thioacetamide model of acute liver failure. This review will focus on mechanisms of NKCC1 activation and its contribution to astrocyte swelling/brain edema in neurological disorders, with particular emphasis on ammonia neurotoxicity and acute liver failure.

Original languageEnglish (US)
Pages (from-to)31-38
Number of pages8
JournalMetabolic Brain Disease
Volume25
Issue number1
DOIs
StatePublished - Mar 2010

Keywords

  • Ammonia
  • Astrocyte swelling
  • Brain edema
  • Hepatic encephalopathy
  • Ischemia
  • Na-K-Cl- cotransporter
  • Trauma

ASJC Scopus subject areas

  • Clinical Neurology
  • Biochemistry
  • Cellular and Molecular Neuroscience

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