Reduction in neuronal L-type calcium channel activity in a double knock-in mouse model of Alzheimer's disease

Olivier Thibault*, Tristano Pancani, Philip W. Landfield, Christopher M. Norris

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Increased function of neuronal L-type voltage-sensitive Ca 2+ channels (L-VSCCs) is strongly linked to impaired memory and altered hippocampal synaptic plasticity in aged rats. However, no studies have directly assessed L-VSCC function in any of the common mouse models of Alzheimer's disease where neurologic deficits are typically more robust. Here, we used cell-attached patch-clamp recording techniques to measure L-VSCC activity in CA1 pyramidal neurons of partially dissociated hippocampal "zipper" slices prepared from 14-month-old wild-type mice and memory-impaired APP/PS1 double knock-in mice. Surprisingly, the functional channel density of L-VSCCs was significantly reduced in the APP/PS1 group. No differences in voltage dependency and unitary conductance of L-VSCCs were observed. The results suggest that mechanisms for Ca 2+ dysregulation can differ substantially between animal models of normal aging and models of pathological aging.

Original languageEnglish (US)
Pages (from-to)546-549
Number of pages4
JournalBiochimica et Biophysica Acta - Molecular Basis of Disease
Volume1822
Issue number4
DOIs
StatePublished - Apr 2012

Keywords

  • Alzheimer's disease
  • Calcium dyshomeostasis
  • Cognitive impairment
  • Hippocampus

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology

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