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Record W2029286082 · doi:10.1051/medsci/2012284019

Le rôle des kinases<i>Mek1</i>et<i>Mek2</i>dans la formation de la barrière hématoplacentaire chez la souris

2012· review· fr· W2029286082 on OpenAlexaff
Valérie Nadeau, Vickram Bissonauth, Jean Charron

Bibliographic record

Venuemédecine/sciences · 2012
Typereview
Languagefr
FieldMedicine
TopicPregnancy and preeclampsia studies
Canadian institutionsCentre hospitalier universitaire de QuébecHôtel-Dieu de QuébecCentre hospitalier de l'Université Laval
Fundersnot available
KeywordsMolecular biologyChemistryBiologyMAPK/ERK pathwayKinaseCell biology

Abstract

fetched live from OpenAlex

La voie de signalisation cellulaire ERK/MAPK (extracellular signal-regulated kinase/mitogen-activated protein kinase) est impliquée dans plusieurs fonctions cellulaires. Chez la souris, l’invalidation de gènes codant pour des membres de cette voie est souvent associée à une mort embryonnaire consécutive à un développement anormal du placenta. Ce dernier est essentiel aux échanges nutritionnels et gazeux entre les circulations maternelle et embryonnaire, ainsi qu’à l’évacuation des déchets métaboliques. Ces échanges s’effectuent sans contact direct entre les deux circulations. Chez la souris, la barrière hématoplacentaire est constituée d’une triple couche de cellules trophoblastiques et de cellules endothéliales de l’embryon. MEK1 (ou MAP/ERK kinase-1) et MEK2 sont des kinases à double spécificité, phosphorylant les résidus sérine/thréonine et tyrosine et responsables de l’activation des kinases ERK1 et ERK2. L’inactivation génique de Mek1 produit une malformation placentaire résultant de défauts de prolifération et de différenciation des cellules trophoblastiques et entraînant un retard sévère du développement du placenta et la mort de l’embryon. Bien que les mutants Mek2-/- survivent sans aucun phénotype apparent, les mutants doubles hétérozygotes Mek1+/-Mek2+/- meurent au cours de la gestation de malformation placentaire. L’ensemble de ces données souligne le rôle crucial de la voie ERK/MAPK dans la formation des structures extraembryonnaires.

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: Not applicable · Consensus signal: none
GenreCandidate signal: Review · Consensus signal: none
Teacher disagreement score0.004
Threshold uncertainty score0.009

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.001
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0020.000

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 head0.043
GPT teacher head0.333
Teacher spread0.290 · 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 designNot applicable
Domainnot available
GenreReview

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

Citations1
Published2012
Admission routes1
Has abstractyes

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