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Record W4416659883 · doi:10.1152/ajpcell.00225.2025

Remodeling of sarcoplasmic reticulum Ca <sup>2+</sup> uptake in cardiac Purkinje cells after ischemic myocardial infarction in various large mammalian species and humans

2025· article· en· W4416659883 on OpenAlexaff
Bruno D. Stuyvers, Yunbo Guo, Wen Dun, Penelope A. Boyden, Ruhul Amin, Louisa Wiede, Jules J.E. Doré, Zoe EC Hopkinson, Henk E.D.J. ter Keurs, Michel Haïssaguerre, Mélèze Hocini, Fabien Brette, Olivier Bernus, Sébastien Chaigne, Bruno Quesson, Edward J. Vigmond

Bibliographic record

VenueAmerican Journal of Physiology-Cell Physiology · 2025
Typearticle
Languageen
FieldMedicine
TopicCardiac electrophysiology and arrhythmias
Canadian institutionsLibin Cardiovascular Institute of AlbertaUniversity of CalgaryMemorial University of Newfoundland
FundersNational Heart, Lung, and Blood Institute
KeywordsPhospholambanEndoplasmic reticulumGene isoformWestern blotPurkinje fibersCalciumDepolarizationImmunofluorescenceMyocardial infarction

Abstract

fetched live from OpenAlex

A gradient in the density of SR-Ca 2+ pumps appears from the center to the periphery of Purkinje cells (Pcells) after MI. We found that this post-MI rearrangement could result from the peripheral expression of SERCA2b pump, which is absent in healthy hearts. The additional expression of SERCA2b to the existing cardiac pump SERCA2a, and possibly more efficient Ca 2+ -transport properties of SERCA2b, are consistent with the proarrhythmic elevation of SR-Ca 2+ uptake previously proposed in Pcells after MI.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.001
Threshold uncertainty score0.003

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.004
GPT teacher head0.220
Teacher spread0.216 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2025
Admission routes1
Has abstractyes

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Same venueAmerican Journal of Physiology-Cell PhysiologySame topicCardiac electrophysiology and arrhythmiasFrench-language works237,207