Evidence map›Paper›PMID 17465978›Full record

ReviewAging cell2007

Expansion of the calcium hypothesis of brain aging and Alzheimer's disease: minding the store.

Olivier Thibault, John C Gant, Philip W Landfield

Open access · bronzeAbstract readReview
In one paragraph

Review in Aging cell, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 200 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
200citing papers in PubMed, 2 pooled it
9.4field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

200 citing papers in PubMed, 2 syntheses or guidelines pooled it, 380 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Review
  6. Review
  7. GRPa-PRS: A risk stratification method to identify genetically-regulated pathways in polygenic diseases.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Article
  13. Bats as instructive animal models for studying longevity and aging.Annals of the New York Academy of Sciences · 2024
    Review
  14. Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article

140 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Olivier ThibaultDepartment of Molecular and Biomedical Pharmacology, University of Kentucky, University of Kentucky Medical Center, Lexington, KY 40536, USA.
John C Gant
Philip W Landfield
University of Kentucky · US

Funding

PROTECTIVE ACTIONS OF ESTRADIOL/SERMS ON BRAIN/HIVP20RR015592 · NCRR · UNIVERSITY OF KENTUCKY · PI KELLY, THOMAS J. · 2000 to 2009
$18.2M
ROLE OF CALCIUM, CALPAINS, AND CASPASES IN NEURODEGENERATIONP01AG010836 · NIA · UNIVERSITY OF KENTUCKY · PI LANDFIELD, PHILIP W. · 1992 to 2008
$12.4M
HIPPOCAMPAL SYNAPTIC STRUCTURE--PHYSIOLOGY DURING AGINGR37AG004542 · NIA · UNIVERSITY OF KENTUCKY · PI LANDFIELD, PHILIP W. · 1998 to 2020
$7.1M
THE MOLECULAR AND CELLULAR BASIS OF BRAIN AGINGT32AG000242 · NIA · UNIVERSITY OF KENTUCKY · PI GERHARDT, GREG A. · 1994 to 2013
$3.4M
NCRR NIH HHS P20 RR015592NCRR NIH HHS P20-RR15592NIA NIH HHS P01 AG010836NIA NIH HHS P01-AG10836NIA NIH HHS R37 AG004542NIA NIH HHS R37-AG04542NIA NIH HHS T32 AG000242NIA NIH HHS T32-AG00242
6 · The paper itself

Abstract

Evidence accumulated over more than two decades has implicated Ca2+ dysregulation in brain aging and Alzheimer's disease (AD), giving rise to the Ca2+ hypothesis of brain aging and dementia. Electrophysiological, imaging, and behavioral studies in hippocampal or cortical neurons of rodents and rabbits have revealed aging-related increases in the slow afterhyperpolarization, Ca2+ spikes and currents, Ca2+transients, and L-type voltage-gated Ca2+ channel (L-VGCC) activity. Several of these changes have been associated with age-related deficits in learning or memory. Consequently, one version of the Ca2+ hypothesis has been that increased L-VGCC activity drives many of the other Ca2+-related biomarkers of hippocampal aging. In addition, other studies have reported aging- or AD model-related alterations in Ca2+ release from ryanodine receptors (RyR) on intracellular stores. The Ca2+-sensitive RyR channels amplify plasmalemmal Ca2+ influx by the mechanism of Ca2+-induced Ca2+ release (CICR). Considerable evidence indicates that a preferred functional link is present between L-VGCCs and RyRs which operate in series in heart and some brain cells. Here, we review studies implicating RyRs in altered Ca+ regulation in cell toxicity, aging, and AD. A recent study from our laboratory showed that increased CICR plays a necessary role in the emergence of Ca2+-related biomarkers of aging. Consequently, we propose an expanded L-VGCC/Ca2+ hypothesis, in which aging/pathological changes occur in both L-type Ca2+ channels and RyRs, and interact to abnormally amplify Ca2+ transients. In turn, the increased transients result in dysregulation of multiple Ca2+-dependent processes and, through somewhat different pathways, in accelerated functional decline during aging and AD.

Indexed as

AgingCalcium SignalingAgedAlzheimer DiseaseAnimalsBiomarkersBrainCalciumCalcium Channels, L-TypeElectrophysiologyHumansIschemiaModels, BiologicalNeuronsRyanodine Receptor Calcium Release ChannelBiomarkersCalciumCalcium Channels, L-TypeRyanodine Receptor Calcium Release Channel

Identifiers

PMID17465978
PMCPMC1974776
OpenAlexW2163643313

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.