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Record W2026197777 · doi:10.1159/000053264

Intracrinology and The Skin

2000· review· en· W2026197777 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.

Bibliographic record

VenueHormone Research in Paediatrics · 2000
Typereview
Languageen
FieldMedicine
TopicHormonal and reproductive studies
Canadian institutionsUniversité Laval
Fundersnot available
KeywordsEndocrinologyInternal medicineDehydroepiandrosteroneAndrostenedioneDihydrotestosteroneAndrogenTestosterone (patch)Hydroxysteroid dehydrogenaseSebaceous glandPregnenoloneAntiandrogenHuman skinChemistryEnzymeBiologySteroidDehydrogenaseMedicineBiochemistryHormone

Abstract

fetched live from OpenAlex

The skin, the largest organ in the human body, is composed of a series of androgen-sensitive components that all express the steroidogenic enzymes required to transform dehydroepiandrosterone (DHEA) into dihydrotestosterone (DHT). In fact, in post-menopausal women, all sex steroids made in the skin are from adrenal steroid precursors, especially DHEA. Secretion of this precursor steroid by the adrenals decreases progressively from the age of 30 years to less than 50% of its maximal value at the age of 60 years. DHEA applied topically or by the oral route stimulates sebaceous gland activity, the changes observed being completely blocked in the rat by a pure antiandrogen while a pure antiestrogen has no significant effect, thus indicating a predominant or almost exclusive androgenic effect. In human skin, the enzyme that transforms DHEA into androstenedione is type 1 3beta-hydroxysteroid dehydrogenase (type 1 3beta-HSD) as revealed by RNase protection and immunocytochemistry. The conversion of androstenedione into testosterone is then catalyzed in the human skin by type 5 17beta-HSD. All the epidermal cells and cells of the sebaceous glands are labelled by type 5 17beta-HSD. This enzyme is also present at a high level in the hair follicles. Type 1 is the 5alpha-reductase isoform responsible in human skin for the conversion of testosterone into DHT. In the vagina, on the other hand, DHEA exerts mainly an estrogenic effect, this effect having been demonstrated in the rat as well as in post-menopausal women. On the other hand, in experimental animals as well as in post-menopausal women, DHEA, at physiological doses, does not affect the endometrial epithelium, thus indicating the absence of DHEA-converting enzymes in this tissue, and avoiding the need for progestins when DHEA is used as hormone replacement therapy.

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)0.004
metaresearch head score (Gemma)0.001
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesResearch integrity
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Review · Consensus signal: Review
Teacher disagreement score0.991
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0040.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0020.000
Bibliometrics0.0010.002
Science and technology studies0.0000.002
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.003
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 head0.153
GPT teacher head0.440
Teacher spread0.287 · 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