Direct Regulation of Gonadotrophin‐Releasing Hormone (GnRH) Transcription By RF‐Amide‐Related Peptide‐3 and Kisspeptin in A Novel GnRH‐Secreting Cell Line, mHypoA‐GnRH/GFP
Bibliographic record
Abstract
RF-amide-related peptide-3 [RFRP-3; also often referred to as the mammalian orthologue of the avian gonadotrophin-inhibitory hormone (GnIH)] and kisspeptin have emerged as potent modulators of neuroendocrine function via direct regulation of the reproductive axis in the hypothalamus and pituitary. There are few studies focusing on the direct regulatory effects of RFRP-3 and kisspeptin on gonadotrophin-releasing hormones (GnRH) neurones. We report their effect on GnRH mRNA expression and release in a novel GnRH neuronal cell model, mHypoA-GnRH/GFP, generated from adult-derived GnRH-GFP neurones. The neurones express receptors for both RFRP-3 and kisspeptin, Gpr147 and Gpr54, respectively. Incubation with 100 nm RFRP-3 results in attenuation of GnRH mRNA expression by approximately 60%. Conversely, incubation with 10 nm of Kiss-10 induced GnRH mRNA expression, whereas the combined effect was an overall repression of GnRH mRNA levels. With transcription inhibitors, the repression of GnRH mRNA levels was linked to a transcriptional mechanism but not mRNA stability. No significant changes in GnRH secretion were observed upon RFRP-3 exposure in these neurones. Our findings suggest that the suppressive signalling of RFRP-3 on GnRH transcription may dominate over kisspeptin induction in the mHypoA-GnRH/GFP GnRH neuronal cell model.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
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".