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Record W2134454524 · doi:10.1002/jemt.10337

Mechanism of action of ACTH: Beyond cAMP

2003· review· en· W2134454524 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.

Bibliographic record

VenueMicroscopy Research and Technique · 2003
Typereview
Languageen
FieldBiochemistry, Genetics and Molecular Biology
TopicReceptor Mechanisms and Signaling
Canadian institutionsUniversité de Sherbrooke
FundersCanadian Institutes of Health ResearchHeart And Stroke Foundation Of QuebecInstitut National de la Santé et de la Recherche Médicale
KeywordsSecond messenger systemCyclic adenosine monophosphateSecretionDiacylglycerol kinaseEndocrinologyProtein kinase ABiologyInternal medicineAdrenal cortexCell biologyProtein kinase CSignal transductionChemistryKinaseReceptorBiochemistryMedicine

Abstract

fetched live from OpenAlex

ACTH is the major regulator of adrenal cortex function, having acute and chronic effects on steroid synthesis and secretion. The precise molecular mechanisms by which ACTH stimulates steroid synthesis and secretion, as well as cell hypertrophy, survival, and migration are still poorly understood. Several studies have shown that ACTH action is mediated not only by cyclic adenosine monophosphate (cAMP), but also by calcium (Ca(2+)), both interacting closely through positive feedback loops to enhance steroid secretion. However, in spite of the evidence that ACTH could stimulate other signaling pathways, such as inositol phosphates and diacylglycerol or mitogenic-activated protein kinase pathway (MAPK), none is as potent as cAMP. Recent data indicate that duration and potency of the cAMP production could be modulated by several isoforms of adenylyl cyclases and phosphodiesterases. In addition, calcium is probably not a first second messenger per se; rather, there are several arguments indicating that its increase occurs following cAMP production. Finally, in addition to steroid secretion, ACTH, through cAMP, is a survival factor, protecting cells against apoptosis. All of the effects of ACTH are dependent on cytoskeleton integrity. In summary, after 30 years of intensive research in this field, cAMP remains the first obligatory second messenger of ACTH action. However, recent work emphasizes that cell environment (matrix and cytoskeleton) probably interacts with cAMP to coordinate functions other than steroid secretion.

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.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation 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: Review · Consensus signal: Review
Teacher disagreement score0.390
Threshold uncertainty score0.843

Codex and Gemma teacher scores by category

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

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 head0.087
GPT teacher head0.430
Teacher spread0.343 · 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