The cystine/glutamate antiporter: when too much of a good thing goes bad

J Clin Invest. 2014 Aug;124(8):3279-81. doi: 10.1172/JCI76627. Epub 2014 Jul 18.


Glutamate excitotoxicity represents a major cellular component of ischemic brain injury. In this issue of the JCI, Soria and colleagues reveal that the cystine/glutamate exchanger is an important source of excitotoxic glutamate in response to ischemia induced by oxygen and glucose deprivation. As the exchanger is a primary determinant of both extracellular glutamate and intracellular glutathione, the findings from this study not only provide important insight into the mechanisms of brain ischemia but also demonstrate the complexity of the yin and yang of glutamate homeostasis and cellular redox balance.

Publication types

  • Research Support, N.I.H., Extramural
  • Comment

MeSH terms

  • Amino Acid Transport System y+ / physiology*
  • Animals
  • Brain Ischemia / etiology*
  • Glutamic Acid / metabolism*


  • Amino Acid Transport System y+
  • Slc7a11 protein, mouse
  • Glutamic Acid