Emerging insights into hypothalamic‐pituitary‐gonadal axis regulation and interaction with stress signalling

In the paper

“Additionally in the last decade, a new pathway of ALLO action through membrane P4 receptors (mPR α and β) was discovered allowing for rapid responses65.”

What the sources say

• Disputed

  In “Is the LH Surge Stimulated by Progesterone or a Metabolite?” (page not specified), the paper says progesterone acted through mPRα and mPRβ, while allopregnanolone did not affect GnRH release in that study. It describes allopregnanolone as acting primarily at GABAA receptors, not as having a discovered pathway through those membrane progesterone receptors. (LLM, conf=0.88)

  Checked by a reasoning model — may be wrong.

  cites [65] sourceExperimental — accuracy not yet measured

In the paper

“Subsequent studies from numerous species have now provided a wealth of information supporting the model that hypothalamic-derived kisspeptin directly activates GnRH neurons via kisspeptin receptor (Kiss1R) to stimulate the reproductive axis (reviewed in 1,2).”

What the sources say

• ?Not checked — no full text of the sourcecites [1] source
• Supported

  Section 2.2 states that hypothalamic kisspeptin directly activates GnRH neurons to stimulate the reproductive axis. The same section reports that GnRH neurons express Kiss1R and that kisspeptin’s effects on the GnRH axis are mediated by Kiss1R. (LLM, conf=0.95)

  cites [2] source

In the paper

“RFRP-3 neurons are found exclusively in the dorsal-medial nucleus of the hypothalamus (DMN) of rodents7,8”

What the sources say

• ?Not checked — no full text of the sourcecites [7] source
• Partly supported

  The Introduction says that, in rodents, RFRP-3-producing neurons are localized exclusively within and immediately adjacent to the hypothalamic DMN. The claim omits the neurons immediately adjacent to the DMN, so its 'exclusively in' wording is too narrow. (LLM, conf=0.88)

  cites [8] sourceExperimental — accuracy not yet measured

In the paper

“In contrast to kisspeptin, another neuropeptide, RFamide-related peptide-3 (RFRP-3), has potent inhibitory actions on LH secretion in many mammalian species6–8.”

What the sources say

• ?Not checked — no full text of the sourcecites [6] source
• ?Not checked — no full text of the sourcecites [7] source
• Supported

  The Introduction says exogenous RFRP-3 potently inhibits the reproductive axis and that RFRP-3 treatment suppresses LH secretion. The Conclusion likewise states that exogenous RFRP-3 suppresses LH secretion. The reported stimulatory effects in two hamster species do not conflict with the claim's qualification of 'many' rather than all mammals. (LLM, conf=0.91)

  cites [8] source

In the paper

“The proximal 140bp consist of tandem copies of DNA binding motifs for the early growth response protein 1 (Egr-1) and steroidogenic factor 1 (SF-1) transcription factors22,23.”

What the sources say

• Partly supported

  The Results (page unavailable) describe a proximal 142-bp LHβ promoter fragment with an SF-1 element at −120 and an Egr-1 motif at −45, supporting the approximate length and presence of both motifs. The paper does not describe these motifs as tandem copies; it also identifies a Ptx1 site in the fragment. (LLM, conf=0.86)

  cites [22] sourceExperimental — accuracy not yet measured
• Partly supported

  The section “A Consensus SF-1 Binding Site Resides within the 5′ Flanking Regions” reports an SF-1 binding sequence in LHβ promoters, and its EMSA results establish SF-1 binding in the bovine promoter (page not provided). Our copy does not report Egr-1 motifs, tandem copies, or a proximal 140-bp region, so those parts of the attributed claim are unsupported. (LLM, conf=0.86)

  cites [23] sourceExperimental — accuracy not yet measured

In the paper

“It is well established that GnRH induces the release of stored LH secretory granules into the systemic circulation14,15.”

What the sources say

• Partly supported

  The section “Hormonal Signals During the Menstrual Cycle” (p. 17) reports that injections of LHRH (GnRH) can induce LH pulses measured in plasma. The cited paper does not establish that the released LH comes from stored secretory granules; that mechanism is the unsupported part of the claim. (LLM, conf=0.86)

  cites [14] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [15] source

In the paper

“Early experiments determined that exogenous kisspeptin treatment of rodents and other species, including humans, robustly increases circulating LH and FSH levels (reviewed in 1,2).”

What the sources say

• ?Not checked — no full text of the sourcecites [1] source
• Supported

  Section 2.2 states that kisspeptin treatment potently stimulates LH and FSH secretion in mice, rats, hamsters, sheep, primates (including humans), and other mammals. This directly supports the citing sentence’s claim about rodents, humans, and other species. (LLM, conf=0.94)

  cites [2] source

In the paper

“Data from transgenic mice suggest that the GSE and the Pitx1 elements are required for GnRH induced LHβ gene promoter activity23,25.”

What the sources say

• Supported

  In “The GSE Is Essential for LHβ Promoter Activity in Transgenic Mice” (page unavailable), mutation of the GSE markedly reduced promoter activity, and the authors report that a physiological rise in GnRH could not compensate for its loss. This supports the GSE portion of the sentence, which carries two citations. (LLM, conf=0.91)

  cites [23] source
• ?Not checked — no full text of the sourcecites [25] source

In the paper

“In contrast, kisspeptin neurons in the AVPV/PeN are thought to be involved in mediating E2-positive feedback which triggers the preovulatory LH surge in females5.”

What the sources say

• Supported

  In “Putting the Pieces Together: Current Model of the Circadian-Regulated Preovulatory LH Surge in Rodents,” the paper says AVPV/PeN Kiss1 neurons are thought to be key players in positive feedback and integrate E2 signals essential for the LH surge. The Introduction explains that E2 positive feedback leads to the preovulatory LH surge in females. The claim preserves the paper’s tentative wording. (LLM, conf=0.94)

  cites [5] source

In the paper

“Both POMC and NPY neurons express ERα protein, although at strikingly different levels54,61.”

What the sources say

• Partly supported

  The Discussion (page unavailable) explicitly says NPY/AgRP neurons express ERα transcript and protein. It also discusses ERα deletion in POMC neurons, but does not compare ERα protein levels between the two populations or establish that the difference is striking. (LLM, conf=0.85)

  cites [54] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [61] source

In the paper

“In some brain areas, locally derived pregnenalone is converted to P4 via 3β-hydroxysteroid dehydrogenase (3β-HSD) which is then metabolized to allopregnenalone (ALLO), the main active derivate, by 5α-reductase and 3α-HSD62.”

What the sources say

• Supported

  The Introduction states that pregnenolone produced in the brain can be metabolized by 3β-HSD into progesterone, which 5α-reductase type I and 3α-HSD then convert into Allo. It also describes the brain-region-specific distribution of these biosynthetic enzymes. The citing sentence uses variant spellings, but its pathway matches the source. (LLM, conf=0.94)

  cites [62] source

In the paper

“However, GnRH neurons from both sexes, and from many species, express ERβ but not ERα31.”

What the sources say

• Partly supported

  The “Evidence for ERs in the GnRH Neuron” section says ERβ may be predominant in GnRH neurons and reports ERβ colocalization with GnRH in humans. But it also reports ERα transcripts in GnRH neurons of female rats, so the categorical claim that these neurons do not express ERα is not supported; the passage does not establish the claim across both sexes. (LLM, conf=0.88)

  cites [31] sourceExperimental — accuracy not yet measured

In the paper

“However, recent evidence indicates that CRH directly modulates GnRH excitability in a dose-dependent and receptor-specific manner under the influence of E257.”

What the sources say

• Partly supported

  The Results (page unavailable) report estradiol-dependent, dose-dependent changes in GnRH neuron firing, and the Discussion (page unavailable) describes opposite effects of CRHR-1 and CRHR-2 activation. But the Discussion explicitly says the observed effects could be direct and/or indirect, so the source does not establish that CRH directly modulates the neurons. (LLM, conf=0.90)

  cites [57] sourceExperimental — accuracy not yet measured

In the paper

“Neurokinin B and dynorphin, co-expressed with kisspeptin (KNDy neurons) in the ARC nucleus and vital components of the GnRH pulse generator, are also downregulated by E2 but through ERα-mediated, ERE-dependent mechanisms44,45.”

What the sources say

• Supported

  The Results report that E2B suppressed both Tac2 (neurokinin B) and Pdyn (dynorphin) expression in the ARC of wild-type female mice. The Discussion identifies them as kisspeptin-coexpressed KNDy neuropeptides and concludes that their regulation is primarily ERE-dependent, in contrast to Kiss1’s ERα-mediated ERE-independent regulation. (LLM, conf=0.93)

  cites [44] source
• Partly supported

  The Discussion reports that E2 inhibits dynorphin (Dyn) expression in the mouse arcuate nucleus through an ERE-dependent ERα pathway. Our copy does not report that neurokinin B is downregulated by this pathway; it mentions neurokinin B in the title of a cited study in the References. The Discussion also says the function of dynorphin in these neurons remains a mystery, rather than establishing it as a vital component of the GnRH pulse generator. No page numbers are available in our copy. (LLM, conf=0.88)

  cites [45] sourceExperimental — accuracy not yet measured

In the paper

“This E2-induced expression of AVPV/PeN kisspeptin occurs with an increase in kisspeptin neuronal activation and peptide release onto GnRH neurons to drive the pre-ovulatory surge of GnRH and LH3,5.”

What the sources say

• Partly supported

  In “Neurochemical phenotypes of RP3V neurons” (page not provided), the review reports estrogen-associated kisspeptin expression, activation of kisspeptin neurons during positive feedback, and evidence for their role in the GnRH surge. It does not establish increased kisspeptin release onto GnRH neurons; the same section says the relationship between rising neuropeptide mRNA and an abrupt increase in secretion is unknown. (LLM, conf=0.88)

  cites [3] sourceExperimental — accuracy not yet measured
• Partly supported

  In “The kisspeptin system: function and neuroanatomy” (page unavailable), the review reports that E2 increases AVPV/PeN Kiss1 expression in female rodents and that these neurons show c-Fos activation at the LH surge. Its “Current Model” section describes stimulatory input from these neurons to GnRH neurons, but the cited passages do not establish increased kisspeptin peptide release onto GnRH neurons; they also frame the neurons’ role in driving the surge as a model rather than a demonstrated causal sequence. (LLM, conf=0.85)

  cites [5] sourceExperimental — accuracy not yet measured

In the paper

“Neurosteroids, particularly P4 and ALLO, have been associated with mood and anxiety disorders63.”

What the sources say

• Supported

  The Introduction explicitly states that progesterone (P) and allopregnanolone (ALLO) have been implicated in mood and anxiety disorders, including major depressive disorder, PMDD, generalized anxiety disorder, and PTSD. This directly supports the citing sentence’s broad association claim. (LLM, conf=0.95)

  cites [63] source

In the paper

“However, E2 restores AVP-induced activation of kisspeptin neurons in the AVPV/PeN in ovariectomized (OVX) female mice49,50”

What the sources say

• Supported

  In the section on estrogen-dependent AVP responses, the paper reports that AVP-induced firing in kisspeptin neurons was restored in estradiol-treated ovariectomized female mice. The Figure 7 caption likewise states that estradiol treatment restored the excitatory effect lost after ovariectomy. The paper calls the recorded region RP3V rather than AVPV/PeN. (LLM, conf=0.93)

  cites [49] source
• Partly supported

  The Results report that E2 treatment increased vasopressin-containing contacts onto kisspeptin neurons in the RP3V of ovariectomized mice. The Discussion interprets this as enhanced vasopressinergic input, but the paper does not show that E2 restores AVP-induced activation of those neurons. (LLM, conf=0.85)

  cites [50] sourceExperimental — accuracy not yet measured

In the paper

“Estrogens, primarily E2, feedback to the brain to control the pulsatile release of GnRH into the primary portal plexus through bimodal interactions with the hypothalamic neurocircuitry that modulate GnRH neurons.”

What the sources say

• Supported

  The section “Evidence for Regulation of GnRH Gene Expression by Estrogen” (page not provided) reports that estrogen inhibits GnRH pulse amplitude and describes distinct hypothalamic sites for inhibitory and stimulatory feedback. The section on E2’s positive-feedback actions (page not provided) explains how estrogen enables hypothalamic circuitry to trigger GnRH release into the hypophysial portal vasculature. (LLM, conf=0.90)

  cites [31] source
• Partly supported

  The Abstract (page unavailable) describes estradiol-mediated negative feedback through RFRP-3 neurons and estrogen-responsive kisspeptin circuitry involved in positive feedback and the GnRH/LH surge. The Discussion (page unavailable) likewise describes these circuits in the context of the preovulatory surge. Our copy does not establish that they control pulsatile GnRH release into the primary portal plexus, the specific process claimed. (LLM, conf=0.84)

  cites [32] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [33] source

In the paper

“In AVPV/PeN kisspeptin neurons, Kiss1 mRNA expression and kisspeptin synthesis are stimulated by E2 through ERα-mediated, ERE-dependent mechanisms45.”

What the sources say

• Partly supported

  The Results section, “E2 Regulation of Kiss1 mRNA in the AVPV” (page unavailable), reports higher Kiss1 mRNA expression with E2, and the Discussion says ERα-mediated, ERE-dependent regulation is suggested by the findings. The paper measures Kiss1 mRNA, not kisspeptin synthesis, and the cited passages address the AVPV rather than explicitly the AVPV/PeN. (LLM, conf=0.88)

  cites [45] sourceExperimental — accuracy not yet measured

In the paper

“E2 at high physiological concentrations enhance GnRH firing frequency through modulation of the after-hyperpolarization potential via a membrane-mediated ERβ-PKA pathway in mice41.”

What the sources say

• Partly supported

  The Abstract (page unavailable) reports that high-physiological estradiol increased firing and reduced the afterhyperpolarization in GnRH neurons from mice; an ERβ agonist mimicked these effects. The Results (page unavailable) report that PKA inhibition eliminated estradiol’s excitatory effect. The paper suggests PKA involvement but does not establish a specifically membrane-mediated ERβ–PKA pathway or exclude other signaling pathways. (LLM, conf=0.84)

  cites [41] sourceExperimental — accuracy not yet measured

In the paper

“Nuclear-initiated ERα and ERβ signaling controls gene expression primarily through direct binding to DNA via an ERE.”

What the sources say

• Supported

  The Introduction describes ERα and ERβ as nuclear transcription factors that bind estrogen-response elements in DNA to regulate gene expression. It also describes an ERE-independent route, consistent with the claim that ERE binding is the primary route rather than the only one. (LLM, conf=0.90)

  cites [34] sourceExperimental — accuracy not yet measured

In the paper

“A second putative, Gq-coupled, E2-responsive GPCR (Gq-mER) controls PLC-mediated signaling in a wide variety of hypothalamic neurosecretory neurons36,37.”

What the sources say

• ?Not checked — no full text of the sourcecites [36] source
• Partly supported

  The Discussion (page not available in our copy) describes an E2-responsive, Gq-coupled mER acting through a PLC-PKC-PKA pathway and identifies it in POMC and dopamine neurons. It says involvement in numerous other hypothalamic pathways remains to be determined, so it does not establish control of PLC signaling across a wide variety of neurosecretory neurons. (LLM, conf=0.86)

  cites [37] sourceExperimental — accuracy not yet measured

In the paper

“ALLO interaction with GABAA receptors contributes to ALLO’s anxiolytic, neuroprotective, neuromodulatory, and anti-gonadotropic properties66–68.”

What the sources say

• ?Not checked — no full text of the sourcecites [66] source
• Partly supported

  The Introduction (p. 1) and Discussion (p. 6) say allopregnanolone enhances GABAA receptor function and report a prior finding of anxiolytic effects, supporting the anxiolytic and neuromodulatory parts of the claim. The passages do not link that interaction to neuroprotective or anti-gonadotropic properties; the Discussion’s general mention of sexual functions does not establish an anti-gonadotropic effect. (LLM, conf=0.87)

  cites [67] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [68] source

In the paper

“ALLO signalling can also influence development of the ovary.”

What the sources say

• ?Not checked — no full text of the sourcecites [71] source
• ?Could not verify

  The Abstract and Results §2.1 examine how ovarian-steroid fluctuations and allopregnanolone affect hippocampal learning and plasticity, not how allopregnanolone affects ovarian development. Searches for “development of the ovary” and “allopregnanolone ovarian development follicle ovary” found no passage addressing that claim. Page numbers were not available in our copy. (LLM, conf=0.76)

  cites [74] sourceExperimental — accuracy not yet measured

In the paper

“ALLO treatment also caused alterations in both follicular and luteal dynamics during the estrous cycle74.”

What the sources say

• ?Could not verify

  The Results (section 2.10; page unavailable) report that 3α-OH-THP altered hippocampal synaptic plasticity, while the Abstract reports improved spatial learning after administration. Searches for follicular and luteal dynamics found no passage reporting that allopregnanolone treatment altered either; the Discussion (section 3.9; page unavailable) mentions the luteal phase only in relation to cognitive performance. (LLM, conf=0.76)

  cites [74] sourceExperimental — accuracy not yet measured

In the paper

“ALLO and its stereoisomer, pregnanolone, can also be sulphated allowing them to modulate glutamatergic neurotransmission through NMDA receptors63.”

What the sources say

• Partly supported

  The “Neuroactive Steroids and Stress” section identifies pregnanolone as a stereoisomer of allopregnanolone. It describes both in relation to GABA receptors, but does not say they can be sulphated or that their sulphated forms modulate glutamatergic neurotransmission through NMDA receptors (searched: sulphated, NMDA, glutamatergic). (LLM, conf=0.84)

  cites [63] sourceExperimental — accuracy not yet measured

In the paper

“In multiple species, psychosocial stress exposure or treatment with exogenous CORT inhibited the pulsatile release of LH79–81”

What the sources say

• Partly supported

  The Abstract reports that hydrocortisone significantly slowed LH pulse frequency in 11 women, and the Introduction associates stress-related reproductive disorders with reduced pulsatile LH secretion. The paper does not establish that psychosocial stress exposure or exogenous cortisol inhibited pulsatile LH release across multiple species; its cortisol experiment was in women. (LLM, conf=0.85)

  cites [79] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results (p. 4) report that restraint, hypoglycaemic and LPS stress suppressed pulsatile LH secretion in female rats. The Discussion (pp. 6–7) says the opposite for exogenous corticosterone at physiological stress levels: neither acute nor chronic administration suppressed LH pulsatility in these rats. It discusses glucocorticoid-related suppression in other species, but that does not support the claim as stated for corticosterone treatment in this study. (LLM, conf=0.88)

  cites [80] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [81] source

In the paper

“While P4 may exert behavioral effects through the classical nuclear P4 receptor (PR) mechanism64, most of P4’s effect may correspond to P4 conversion to ALLO63.”

What the sources say

• Partly supported

  In “Neuroactive Steroids and Stress: Background and Research in Laboratory Animals” (page unavailable), the paper says progesterone’s anti-stress and anxiolytic effects are thought to arise from conversion to allopregnanolone rather than intracellular progesterone receptors. It also acknowledges some evidence for receptor-mediated effects. The claim extends that proposed mechanism to most of progesterone’s behavioral effects, a broader conclusion the passage does not establish. (LLM, conf=0.82)

  cites [63] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Results and Discussion (page unavailable) examine progesterone signaling through membrane receptors in ovarian cancer cells, not behavioral effects. Searches for allopregnanolone, progesterone conversion, and behavioral effects found no passage addressing whether conversion accounts for most of progesterone’s behavioral effects. (LLM, conf=0.76)

  cites [64] sourceExperimental — accuracy not yet measured

In the paper

“ALLO interacts with the GABAA receptors as an allosteric modulator63,65”

What the sources say

• Supported

  The section “Neuroactive Steroids and Stress: Background and Research in Laboratory Animals” explicitly describes ALLO as a positive allosteric modulator of GABA-A receptors. This directly supports the cited claim. (LLM, conf=0.95)

  cites [63] source
• Supported

  The Introduction states that allopregnanolone is a notable steroid metabolite that binds allosterically to modulate a membrane receptor, and identifies that receptor as GABAA. This supports the attributed claim. (LLM, conf=0.94)

  cites [65] sourceExperimental — accuracy not yet measured

In the paper

“Collectively, these findings in female mice support the hypothesis that physiological stress-levels of CORT disrupt ovarian cyclicity, in part, through disruption of positive feedback mechanisms at hypothalamic kisspeptin circuits which are known to be necessary for LH surge generation.”

What the sources say

• Supported

  The Abstract states that physiological stress-levels of corticosterone disrupt ovarian cyclicity and positive-feedback mechanisms needed for the LH surge. The Discussion identifies impaired responsiveness of hypothalamic AVPV/PeN kisspeptin neurons to estradiol as one contributing mechanism and describes those neurons as a critical pathway for surge generation. (LLM, conf=0.94)

  cites [84] source

In the paper

“and enhances GABA-mediated inhibition at GABAA receptors”

What the sources say

• Supported

  The section “Neuroactive Steroids and Stress: Background and Research in Laboratory Animals” states that allopregnanolone is a positive allosteric modulator of GABA-A receptors and enhances GABA’s effect on chloride influx, producing longer-lasting inhibitory post-synaptic potentials. This directly supports the claim. (LLM, conf=0.95)

  cites [63] source
• Supported

  The Introduction (page unavailable) says allopregnanolone activates the GABAA receptor, and the section on progesterone metabolites says GABA receptors are classically inhibitory. Together, these support the general claim; the paper separately notes that responses in GnRH neurons can differ. (LLM, conf=0.87)

  cites [65] source

In the paper

“exogenous CORT treatment of gonad-intact female mice arrested cyclicity in diestrus84.”

What the sources say

• Supported

  The Results section reports that corticosterone-treated female mice remained in diestrus for 90% of the implant period and failed to progress to estrus. The Discussion identifies these mice as ovarian-intact, supporting the claim that exogenous CORT arrested cyclicity in gonad-intact females. (LLM, conf=0.95)

  cites [84] source

In the paper

“at high doses, ALLO acts as a GABAA receptor agonist.”

What the sources say

• Supported

  In “Neuroactive Steroids and Stress: Background and Research in Laboratory Animals,” the paper explicitly states that at high doses ALLO can act as a GABA-A agonist in the absence of GABA. (LLM, conf=0.95)

  cites [63] source
• Partly supported

  The Introduction (page not provided) says allopregnanolone allosterically binds to and activates the GABAA receptor. It does not specify that this action occurs at high doses or characterize it as direct agonism, so the dose-dependent claim is not fully supported. (LLM, conf=0.87)

  cites [65] sourceExperimental — accuracy not yet measured

In the paper

“ERα is also expressed in other GABAergic neurons that project into the PVN”

What the sources say

• Partly supported

  The Results section reports ERα in GAD67-positive GABAergic neurons surrounding the PVN, and the Discussion identifies ERα in regions that provide inhibitory GABA input to the PVN. However, the Discussion explicitly says the authors do not know whether the ERα-expressing peri-PVN neurons project directly to the PVN, so the claim is stronger than the evidence for those neurons. (LLM, conf=0.85)

  cites [90] sourceExperimental — accuracy not yet measured

In the paper

“This reduction in HPA axis reactivity was also seen when ERβ in the PVN were selectively activated88.”

What the sources say

• Partly supported

  The Results section reports that ERβ-selective compounds placed above the PVN significantly reduced corticosterone and ACTH responses to restraint stress in male rats. But the Discussion says the pellets were not placed within the PVN and that diffusion to nearby ERβ-expressing cells could not be excluded. The study therefore supports reduced HPA reactivity after local ERβ-selective treatment, not selective activation of ERβ specifically within the PVN. (LLM, conf=0.85)

  cites [88] sourceExperimental — accuracy not yet measured

In the paper

“Male GDX rats treated with an ERα agonist showed increased HPA axis reactivity following acute stress88.”

What the sources say

• Supported

  The Bilateral cannulation of the PVN methods section states that the male rats were gonadectomized and received implants containing the ERα-selective agonists moxestrol or PPT. The results section, “DHT- and ERβ-selective ligands suppress the hormonal response to restraint stress” (page not provided), reports significantly higher corticosterone after restraint stress with those agonists than with control treatment, with a similar ACTH response. (LLM, conf=0.94)

  cites [88] source

In the paper

“The effects of P4 on HPA axis reactivity are thought to be primarily due to conversion of P4 to ALLO rather than through intracellular PR signaling63.”

What the sources say

• Partly supported

  In “Neuroactive Steroids and Stress: Background and Research in Laboratory Animals” (page unavailable), the review says P’s anti-stress and anxiolytic effects are thought to act mainly through conversion to ALLO rather than intracellular P receptors. It also reports that ALLO can down-regulate the HPA axis, but does not specifically establish that P’s effects on HPA-axis reactivity follow that mechanism rather than intracellular PR signaling. (LLM, conf=0.83)

  cites [63] sourceExperimental — accuracy not yet measured

In the paper

“and gonadectomized (GDX) males treated with E288 or estradiol benozoate (EB)89 showed elevated CORT release following acute restraint stress compared to control animals.”

What the sources say

• Supported

  The Results section (“DHT- and ERβ-selective ligands suppress the hormonal response to restraint stress”) reports significantly higher plasma corticosterone after E2 treatment than in vehicle controls following restraint. The paper studied gonadectomized male rats. Estradiol benzoate is attached to a different citation in the citing sentence and is not assessed here. (LLM, conf=0.93)

  cites [88] source
• ?Not checked — no full text of the sourcecites [89] source

In the paper

“These results suggest that the GR-induced negative feedback of the HPA axis was impaired by ERα on GABAergic neurons in the peri-PVN area90.”

What the sources say

• Supported

  The Results section (‘ERα is expressed in GABAergic neurons surrounding the PVN’; page unavailable) reports ERα in predominantly GABAergic peri-PVN neurons. The Discussion (page unavailable) reports impaired glucocorticoid-mediated negative feedback after local ERα activation and suggests reduced inhibitory GABAergic input as the mechanism, matching the citing sentence’s tentative wording. (LLM, conf=0.90)

  cites [90] source

In the paper

“Additionally, treatment with DHT reduced CORT release following restraint stress88,89.”

What the sources say

• Supported

  The Results section, “DHT- and ERβ-selective ligands suppress the hormonal response to restraint stress,” reports significantly lower plasma corticosterone in stressed animals given central DHT treatment than in vehicle controls. The paper studied centrally treated animals; the citing sentence does not specify a treatment route. (LLM, conf=0.94)

  cites [88] source
• ?Not checked — no full text of the sourcecites [89] source

In the paper

“In the third trimester of pregnancy, an increase in fetal glucocorticoid concentration occurs95.”

What the sources say

• Supported

  Section 2.1 states that fetal cortisol concentrations increase markedly in the third trimester. The supplied passage has no page number. (LLM, conf=0.93)

  cites [95] source

In the paper

“DHT can be metabolized to 3β-diol which is an ERβ specific ligand thereby contributing to DHT’s inhibition of HPA axis reactivity88.”

What the sources say

• Partly supported

  The Discussion (page unavailable) says DHT can be converted to 3β-diol, which binds ERβ, and proposes that this may partly explain DHT’s inhibition of HPA reactivity. It identifies DPN—not 3β-diol—as the ERβ-subtype-selective agonist. Calling 3β-diol an ERβ-specific ligand and stating its contribution as established go beyond the paper’s findings. (LLM, conf=0.86)

  cites [88] sourceExperimental — accuracy not yet measured

In the paper

“Rats88,89 and mice91 treated with an ERβ selective agonist showed decreased stress-induced ACTH and CORT release compared to vehicle-treated animals.”

What the sources say

• Supported

  The Results section reports that stressed male rats given the ERβ-selective agonist DPN had significantly lower corticosterone and ACTH levels than vehicle controls. The mouse finding has a separate citation in the citing sentence and is not attributed to this paper. (LLM, conf=0.92)

  cites [88] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [89] source
• Supported

  The citation to this paper supports the mouse portion of the sentence; the rat findings have separate citations. The Discussion (p. 6) reports that S-DPN-treated wild-type mice had significantly lower plasma ACTH and corticosterone after the elevated plus maze than vehicle-treated controls. The Results and figure caption (pp. 6–7) likewise describe attenuation of both stress-hormone responses. (LLM, conf=0.93)

  cites [91] sourceExperimental — accuracy not yet measured

In the paper

“suggesting that E2 increases HPA axis reactivity.”

What the sources say

• Supported

  Section 5.3 reports that estradiol treatment reverses reduced stress-induced CORT and ACTH secretion after ovariectomy in female rodents, and that brain infusion increases corticosterone responses. The section notes that effects vary by treatment and receptor pathway, but supports the citing sentence’s qualified wording. No page number is provided in our copy. (LLM, conf=0.90)

  cites [86] source

In the paper

“As previously discussed, ALLO binds to GABAA receptors to promote inhibition63”

What the sources say

• Supported

  The ‘Neuroactive Steroids and Stress: Background and Research in Laboratory Animals’ section states that ALLO acts as a positive allosteric modulator of GABA-A receptors, enhancing GABA’s effects and producing longer-lasting inhibitory post-synaptic potentials. This supports the citing sentence’s description of ALLO promoting inhibition through those receptors. (LLM, conf=0.95)

  cites [63] source

In the paper

“During intrauterine development, the hormonal systems that regulate the HPG and HPA axes plays a crucial role in the growth and development of fetal tissues95.”

What the sources say

• Supported

  Section 2.1 says fetal HPA-axis glucocorticoids help mature numerous organs during intrauterine development and that ACTH controls fetal adrenal growth and development. Section 2.5 says HPG-axis hormones regulate development of the ovaries and testes. Together, these passages support the broad claim about both axes and fetal tissue development. (LLM, conf=0.88)

  cites [95] source

In the paper

“Through these gonadal steroids, the HPG axis can exert a modulatory effect over the HPA axis (for review see 63,86).”

What the sources say

• Supported

  The Introduction (page not provided) identifies the ovary as a source of progesterone and its derivative allopregnanolone. The stress-coping section (page not provided) says allopregnanolone directly down-regulates the HPA axis, supporting the claim that gonadal steroids can modulate it. (LLM, conf=0.86)

  cites [63] source
• Supported

  Section 3 describes how the HPG axis stimulates gonadal steroid secretion. Section 5.1 reports that androgens and estrogens modulate adrenal, pituitary and hypothalamic functions involved in the HPA axis. The supplied passages do not give page numbers. (LLM, conf=0.93)

  cites [86] source

In the paper

“While these data suggest that E2 increases HPA axis reactivity, the effects of E2 were not always consistent86.”

What the sources say

• Supported

  Section 5.3 states that estrogen’s effect on stress responses is not always consistent: some studies found increased responses, while others found inhibition or no effect. This directly supports the attributed claim about E2 and HPA-axis reactivity. (LLM, conf=0.95)

  cites [86] source

In the paper

“Both ER receptors are found throughout the brain and with overlapping expression in numerous areas important in HPA axis regulation86.”

What the sources say

• Supported

  Section 4.4, “Estrogen receptor distribution in brain,” states that estrogen receptors are expressed throughout the brain and that ERα and ERβ have overlapping expression patterns. It names several regions important for HPA circuitry that express both receptors. (LLM, conf=0.94)

  cites [86] source

In the paper

“In rodents, a critical window of study is between GD 12 to GD 1998–100.”

What the sources say

• ?Not checked — no full text of the sourcecites [98] source
• ?Not checked — no full text of the sourcecites [99] source
• Partly supported

  Section 2.2 (page not available) reports treatment of pregnant rats on GD 12, 13, 18, and 19, with the later course timed to brain sexual differentiation. The Introduction identifies GD 18–19 as a marked testosterone-surge period in male rats. The paper does not describe GD 12–19 as one continuous critical window or establish that window for rodents generally. (LLM, conf=0.87)

  cites [100] sourceExperimental — accuracy not yet measured

In the paper

“This is further supported by observations that during the estrus phase of the estrous cycle, when E2 levels are lowest, CORT response to stress is reduced compared to during proestrus when E2 and P4 levels are elevated87.”

What the sources say

• Partly supported

  The ‘Basal And Stress ACTH And B Levels In Cycling Rats’ section reports a higher corticosterone response to restraint stress in proestrous rats than in estrous rats. The ‘Estrous Cycle’ section says estrogen and progesterone are low during estrous, but progesterone rises later in proestrous; the ‘Additional information’ section says the enhanced stress response appears restricted to early proestrous, when both hormones were not shown to be elevated. The claim therefore supports the response comparison but oversimplifies its hormonal timing. (LLM, conf=0.88)

  cites [87] sourceExperimental — accuracy not yet measured

In the paper

“and that following restraint stress, glucocorticoid release was higher in females86”

What the sources say

• Partly supported

  Section 5.1 reports greater stress-induced glucocorticoid secretion in female than male rodents. Section 5.3 discusses corticosterone following restraint stress, but does not give a female–male comparison for that specific stressor. The review also cautions that the direction of the sex difference can depend on species. (LLM, conf=0.85)

  cites [86] sourceExperimental — accuracy not yet measured

In the paper

“however, ALLO administration may also reduce HPA axis reactivity through reduction of CRH and AVP gene transcription63.”

What the sources say

• Supported

  The “Neuroactive Steroids and Stress: Background and Research in Laboratory Animals” section states that ALLO administration down-regulates CRH and AVP gene transcription in rodents. The “A Hypothesis for a Broad Role” section links this effect to down-regulation of the HPA axis, supporting the claim’s hedged mechanism. (LLM, conf=0.93)

  cites [63] source

In the paper

“However, the effect of DHT within the PVN is not solely through AR signaling, as AR antagonist treatment does not completely abolish the effect of T on reducing HPA axis reactivity88.”

What the sources say

• Partly supported

  The Discussion and the section on androgen-receptor antagonism report that flutamide did not completely block DHT’s suppression of stress-induced corticosterone and ACTH, supporting a mechanism that is not solely AR-mediated. But the experiment tested DHT, not testosterone (T), so it does not establish the stated result for T. (LLM, conf=0.87)

  cites [88] sourceExperimental — accuracy not yet measured

In the paper

“Additionally, OVX females showed reduced levels of CORT release following restraint stress86”

What the sources say

• Partly supported

  Section 5.3 states that ovariectomy reduces stress-induced CORT secretion in female rodents. It specifically mentions reduced CORT following restraint stress for animals given an estrogen-receptor antagonist, not for ovariectomized females, so the restraint-specific part of the claim is not established. (LLM, conf=0.84)

  cites [86] sourceExperimental — accuracy not yet measured

In the paper

“This inconsistency of E2’s effect on the HPA axis relates to E2 activity at ERα and ERβ.”

What the sources say

• Supported

  Section 5.3 says estradiol’s effects on stress responses are inconsistent and that the ER signaling pathway can influence them because ERα and ERβ can have opposing actions on HPA-axis function. It also identifies dose, treatment duration, and time since ovariectomy as possible contributors; the claim does not exclude those factors. (LLM, conf=0.93)

  cites [86] source

In the paper

“Numerous studies find that basal CORT levels are higher in females than males”

What the sources say

• Partly supported

  Section 5.1 reports greater basal adrenal glucocorticoid secretion in female than male rodents, supporting the claim for rodents. It also says the direction of sex differences can depend on species, so the unqualified statement about females and males is broader than the source supports. (LLM, conf=0.86)

  cites [86] sourceExperimental — accuracy not yet measured

In the paper

“Additionally, ERβ has been shown to bind to the promoter of all three neuropeptides86.”

What the sources say

• Supported

  Sections 6.1–6.3 describe ERβ acting at the promoters of all three neuropeptides: CRF, vasopressin (AVP), and oxytocin. Section 6.1 reports ERβ occupancy at the CRF promoter, section 6.2 reports ERβ activation through an upstream element of the AVP promoter, and section 6.3 reports ERβ occupancy at the oxytocin promoter. The AVP passage describes promoter activation rather than directly measuring occupancy, but supports the paraphrase in context. (LLM, conf=0.86)

  cites [86] source

In the paper

“and increased concentrations may allow for termination of HPA axis signaling63.”

What the sources say

• Supported

  In “A Hypothesis for a Broad Role for Progesterone and Allopregnanolone in Stress Coping and Recovery” (page unavailable), the paper proposes that rising neurosteroid levels provide an additional brake on the stress response and says allopregnanolone directly down-regulates the HPA axis. The claim’s tentative “may allow” reflects that proposed role; the paper also discusses progesterone and allopregnanolone together in stress responses. (LLM, conf=0.88)

  cites [63] source

In the paper

“This gender disparity in prevalence supports a role for gonadal steroids, E2, P4, and T, in modulating the HPA axis.”

What the sources say

• Supported

  The Introduction (page unavailable) links sex differences in the risk of neuropsychiatric disorders, including major depression, to a possible modulatory role for gonadal steroids in HPA-axis function. Sections 5.1 and 5.2 (pages unavailable) discuss effects of estradiol, testosterone, and progesterone on HPA-axis activity, supporting the citing sentence’s proposed role for E2, P4, and T. (LLM, conf=0.90)

  cites [86] source

In the paper

“Thus, glucocorticoid exposure in this critical window of development becomes important, as any disturbance can lead to irreversible damage on the reproductive tract95,101.”

What the sources say

• Partly supported

  Section 3 (Programming; page unavailable) says adverse conditions during critical developmental periods can cause persistent malfunction. Section 4.5 (Programming of the hypothalamic-pituitary-gonadal axis; page unavailable) reports permanent changes to reproductive-axis physiology after fetal steroid excess and lasting changes in gonadal development after glucocorticoid overexposure. It does not establish that glucocorticoid exposure causes irreversible anatomical damage to the reproductive tract, so the claim is more specific than the evidence. (LLM, conf=0.84)

  cites [95] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [101] source

In the paper

“Moreover, the intrauterine exposure to betamethasone promoted drastic alterations in the seminiferous tubule morphology, compromising its cytoarchitecture and spermatogenesis108.”

What the sources say

• Partly supported

  The Results report abnormal seminiferous-tubule morphology, reduced tubule diameter, delayed germ-cell maturation, and fewer tubules at stages VII–VIII. But abnormalities affected approximately 20% of tubules; the paper says spermatogenesis remained active and cellular organization appeared maintained within the displaced cells. Thus, “drastic” disruption of cytoarchitecture and spermatogenesis overstates the findings. (LLM, conf=0.86)

  cites [108] sourceExperimental — accuracy not yet measured

In the paper

“Overall, treatment with glucocorticoids during a critical window of development promotes alterations to the reproductive system, for both, male and female offspring, which continued into adulthood.”

What the sources say

• Partly supported

  The Introduction (p. 1) describes exposure during critical days of sexual development, and the Discussion (p. 7) concludes that prenatal betamethasone causes long-term reproductive impairment in male rats. The paper does not report reproductive effects in female offspring continuing into adulthood; its experiments used male offspring (Experimental design, p. 2). (LLM, conf=0.91)

  cites [106] sourceExperimental — accuracy not yet measured
• Partly supported

  The Discussion reports that prenatal betamethasone exposure during critical periods of male fetal sexual development altered the reproductive system of second-generation male rats, with effects observed from birth to adulthood. The paper does not report reproductive-system alterations in female offspring, so the claim's extension to both sexes is unsupported. (LLM, conf=0.88)

  cites [107] sourceExperimental — accuracy not yet measured
• Partly supported

  The Discussion reports that betamethasone exposure during a sensitive developmental window caused reproductive alterations in male rat offspring that persisted into adulthood. The study assessed male offspring; our copy does not establish the claimed adult reproductive effects in female offspring. (LLM, conf=0.90)

  cites [108] sourceExperimental — accuracy not yet measured

In the paper

“These findings demonstrate the impact of glucocorticoid exposure on the masculinization process of the hypothalamus.”

What the sources say

• ?Not checked — no full text of the sourcecites [98] source
• ?Not checked — no full text of the sourcecites [99] source
• Partly supported

  The Discussion (in the paper’s pp. 163–167) links prenatal betamethasone exposure to altered sexual behavior in male rats and says the results “suggest an incomplete masculinization and defeminization of the hypothalamus.” The citing sentence’s “demonstrate” is stronger than that qualified conclusion; the paper does not establish the hypothalamic mechanism directly. (LLM, conf=0.84)

  cites [100] sourceExperimental — accuracy not yet measured

In the paper

“Work by Khan et al. shows that GnRH also induces the citrullination of histone H3 arginine residues 2, 8, and 17 to stimulate expression of the Lhb gene30.”

What the sources say

• ?Not checked — no full text of the sourcecites [30] source

In the paper

“Sandwiched between the tandem Egr and gonadotrope specific element (GSE) motifs, is the binding site for Pitx1, a paired-like homeodomain transcription factor24.”

What the sources say

• ?Not checked — no full text of the sourcecites [24] source

In the paper

“Recent evidence suggests that hypothalamic kisspeptin neurons, which express ERα and AR, are these upstream sex steroid-sensitive neurons.”

In the paper

“The Kiss1 gene encodes the neuropeptide kisspeptin, which potently stimulates GnRH secretion1.”

What the sources say

• ?Not checked — no full text of the sourcecites [1] source

In the paper

“GnRH also induces epigenetic mechanisms to regulate LHβ gene expression.”

In the paper

“Thus, GnRH stimulation initiates both epigenetic and transcriptional mechanisms to increase LHβ gene expression in gonadotrope cells.”

In the paper

“The distinct E2-induced responses in the melanocortin neurons potentially amplify E2’s role in the negative feedback on the HPG axis.”

In the paper

“and E2 perfusion can rapidly depolarize SCN neurons by increasing the frequency of excitatory postsynaptic currents leading to an increase in firing frequency51.”

What the sources say

• ?Not checked — no full text of the sourcecites [51] source

In the paper

“Furthermore, as reproduction and survival need to be coordinated and balanced, the HPG axis is able to modulate—and be modulated by—stress hormone signaling, including cortiscosterone, from the hypothalamic-pituitary-adrenal (HPA) axis.”

In the paper

“Emerging evidence indicates that steroid hormones synthesized in the brain, termed “neurosteroids,” have impact on the reproductive axis.”

In the paper

“In addition to guiding proper gonadal development and function, gonadal sex steroids also act in negative and positive feedback loops to regulate reproductive circuitry in the brain, including kisspeptin neurons, thereby modulating overall HPG axis status.”

In the paper

“Alternatively, ERα and ERβ can modulate transcription through protein-protein interactions with other transcription factors interacting with DNA in non-ERE promoter sites.35”

What the sources say

• ?Not checked — no full text of the sourcecites [35] source

In the paper

“As previously discussed, ARC-derived kisspeptin is the primary “gatekeeper” of GnRH pulsatility.”

In the paper

“Neither AVP nor VIP neurons of the SCN express detectable ERα or ERβ protein in the mouse48.”

What the sources say

• ?Not checked — no full text of the sourcecites [48] source

In the paper

“Additional regulation is also provided by sex steroids made within the brain, including neuroprogestins.”

In the paper

“Membrane-associated ERα and ERβ can also activate signaling cascades to modulate cell physiology and control gene expression including phosphatidylinositol 3′-kinase (PI3K), phospholipase C (PLC), MAPK and protein kinase pathways (PKA, PKC, etc.)36 .”

What the sources say

• ?Not checked — no full text of the sourcecites [36] source

In the paper

“ERα has been identified as the key ER mediating the negative and positive feedback of E2.”

In the paper

“Furthermore, Rfrp mRNA levels in female mice were elevated after 180 min of restraint stress”

What the sources say

• ?Not checked — no full text of the sourcecites [85] source

In the paper

“suggesting that some ALLO action involves GABAA signalling71,72.”

What the sources say

• ?Not checked — no full text of the sourcecites [71] source
• Not checked yetcites [72]

In the paper

“Acute restraint stress had no effect on Kiss1 mRNA levels”

What the sources say

• ?Not checked — no full text of the sourcecites [85] source

In the paper

“Stress, including psychological stress, can negatively impact reproduction in many mammalian species, including humans.”

What the sources say

• ?Not checked — no full text of the sourcecites [75] source
• ?Not checked — no full text of the sourcecites [76] source

In the paper

“Supporting the mouse data, in rats, 5 hours of restraint stress increased hypothalamic Rfrp expression and decreased mean LH secretion via a pathway dependent on elevated CORT77.”

What the sources say

• ?Not checked — no full text of the sourcecites [77] source

In the paper

“When ALLO ICV injection was coupled with a GABAA receptor antagonist, sexual receptivity was recovered”

What the sources say

• ?Not checked — no full text of the sourcecites [71] source
• Not checked yetcites [72]

In the paper

“ALLO levels decrease in the hypothalamus during proestrus, when ovulation occurs”

What the sources say

• ?Not checked — no full text of the sourcecites [70] source

In the paper

“though there was a significant decrease in Kiss1 neuronal activation at all time points”

What the sources say

• ?Not checked — no full text of the sourcecites [85] source

In the paper

“suggesting a decrease in stimulatory kisspeptin input to GnRH neurons85.”

What the sources say

• ?Not checked — no full text of the sourcecites [85] source

In the paper

“suggesting that increased RFRP-3 signaling, known to inhibit GnRH and LH, may occur rapidly following acute stress85.”

What the sources say

• ?Not checked — no full text of the sourcecites [85] source

In the paper

“This suggests that ALLO may also modulate NMDA receptor activity to alter HPG axis activity73.”

What the sources say

• ?Not checked — no full text of the sourcecites [73] source

In the paper

“The E2-induced surge mode of GnRH and LH secretion (i.e., positive feedback), which governs ovulation in females, is vulnerable to the effects of stress.”

In the paper

“Rats treated with a single ICV injection of ALLO on the morning of proestrus showed ovarian disorders, such as follicular atresia, ovarian cysts, and delayed luteolysis, an apoptotic process of the corpus luteum71.”

What the sources say

• ?Not checked — no full text of the sourcecites [71] source

In the paper

“This effect of ALLO on serotonin signalling may be pertinent for disorders linked to reproductive hormone fluctuations such as premenstrual dysphoric disorder and postpartum depression69.”

What the sources say

• ?Not checked — no full text of the sourcecites [69] source

In the paper

“For example, restraint stress, a commonly-used model of psychosocial stress, reduces LH and FSH in rodents and other species77,78.”

What the sources say

• ?Not checked — no full text of the sourcecites [77] source
• ?Not checked — no full text of the sourcecites [78] source

In the paper

“Collectively, the data described in this section suggest that stress-induced suppression of the reproductive axis in female mice may be due, at least in part, to regulation at levels upstream of GnRH neurons, either directly or indirectly, through ARC kisspeptin and/or DMN RFRP-3 neurons.”

What the sources say

• ?Not checked — no full text of the sourcecites [85] source

In the paper

“ALLO fluctuations during the estrous cycle have a strong impact on reproductive function70,71.”

What the sources say

• ?Not checked — no full text of the sourcecites [70] source
• ?Not checked — no full text of the sourcecites [71] source

In the paper

“In serotonergic neurons, ALLO, not P4, potentiated GABAA receptor response to agonists69.”

What the sources say

• ?Not checked — no full text of the sourcecites [69] source

In the paper

“which supports a role for ALLO in modulating the HPG axis to control ovulation70.”

What the sources say

• ?Not checked — no full text of the sourcecites [70] source

In the paper

“GDX male rats showed elevated CORT release following stressor exposure compared to gonad-intact males94.”

What the sources say

• ?Not checked — no full text of the sourcecites [94] source

In the paper

“This elevated CORT release was reduced with administration of T or DHT, a T metabolite94.”

What the sources say

• ?Not checked — no full text of the sourcecites [94] source

In the paper

“With preterm births, these changes have yet to occur as endogenous concentrations of glucocorticoids are still low.”

In the paper

“This increase provides a number of modifications in several tissues and organs essential for fetal survival, including lung maturation and pulmonary surfactant production96.”

What the sources say

• ?Not checked — no full text of the sourcecites [96] source