Parvalbumin overexpression alters immune-mediated increases in intracellular calcium, and delays disease onset in a transgenic model of familial amyotrophic lateral sclerosis

David Beers, Bao Kuang Ho, Laszlo Siklós, Maria E. Alexianu, Dennis R. Mosier, A. Habib Mohamed, Yasushi Otsuka, Milena E. Kozovska, Robert E. McAlhany, R. Glenn Smith, Stanley H. Appel

Research output: Contribution to journalArticlepeer-review

116 Scopus citations

Abstract

Intracellular calcium is increased in vulnerable spinal motoneurons in immune-mediated as well as transgenic models of amyotrophic lateral sclerosis (ALS). To determine whether intracellular calcium levels are influenced by the calcium-binding protein parvalbumin, we developed transgenic mice overexpressing parvalbumin in spinal motoneurons. ALS immunoglobulins increased intracellular calcium and spontaneous transmitter release at motoneuron terminals in control animals, but not in parvalbumin overexpressing transgenic mice. Parvalbumin transgenic mice interbred with mutant SOD1 (mSOD1) transgenic mice, an animal model of familial ALS, had significantly reduced motoneuron loss, and had delayed disease onset (17%) and prolonged survival (11%) when compared with mice with only the mSOD1 transgene. These results affirm the importance of the calcium binding protein parvalbumin in altering calcium homeostasis in motoneurons. The increased motoneuron parvalbumin can significantly attenuate the immune-mediated increases in calcium and to a lesser extent compensate for the mSOD1-mediated 'toxic-gain-of-function' in transgenic mice.

Original languageEnglish (US)
Pages (from-to)499-509
Number of pages11
JournalJournal of Neurochemistry
Volume79
Issue number3
DOIs
StatePublished - 2001

Keywords

  • Calcium-binding proteins
  • Motoneurons
  • Super-oxide dismutase

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience

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