A Polymorphism in CALHM1 Influences Ca2+ Homeostasis, Aβ Levels, and Alzheimer's Disease Risk

  • Ute Dreses-Werringloer
  • , Jean Charles Lambert
  • , Valérie Vingtdeux
  • , Haitian Zhao
  • , Horia Vais
  • , Adam Siebert
  • , Ankit Jain
  • , Jeremy Koppel
  • , Anne Rovelet-Lecrux
  • , Didier Hannequin
  • , Florence Pasquier
  • , Daniela Galimberti
  • , Elio Scarpini
  • , David Mann
  • , Corinne Lendon
  • , Dominique Campion
  • , Philippe Amouyel
  • , Peter Davies
  • , J. Kevin Foskett
  • , Fabien Campagne
  • Philippe Marambaud

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Alzheimer's disease (AD) is a genetically heterogeneous disorder characterized by early hippocampal atrophy and cerebral amyloid-β (Aβ) peptide deposition. Using TissueInfo to screen for genes preferentially expressed in the hippocampus and located in AD linkage regions, we identified a gene on 10q24.33 that we call CALHM1. We show that CALHM1 encodes a multipass transmembrane glycoprotein that controls cytosolic Ca2+ concentrations and Aβ levels. CALHM1 homomultimerizes, shares strong sequence similarities with the selectivity filter of the NMDA receptor, and generates a large Ca2+ conductance across the plasma membrane. Importantly, we determined that the CALHM1 P86L polymorphism (rs2986017) is significantly associated with AD in independent case-control studies of 3404 participants (allele-specific OR = 1.44, p = 2 × 10-10). We further found that the P86L polymorphism increases Aβ levels by interfering with CALHM1-mediated Ca2+ permeability. We propose that CALHM1 encodes an essential component of a previously uncharacterized cerebral Ca2+ channel that controls Aβ levels and susceptibility to late-onset AD. © 2008 Elsevier Inc. All rights reserved.
    Original languageEnglish
    Pages (from-to)1149-1161
    Number of pages12
    JournalCell
    Volume133
    Issue number7
    DOIs
    Publication statusPublished - 27 Jun 2008

    Keywords

    • HUMDISEASE
    • PROTEINS
    • SIGNALING

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