ArticleMolecular and cellular endocrinology2015
Role of PI4K and PI3K-AKT in ERK1/2 activation by GnRH in the pituitary gonadotropes.
Article in Molecular and cellular endocrinology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
11 citing papers in PubMed, 27 citations in OpenAlex.
- Ovarian Development in Channa argus var.: Joint Mediation by Melatonin, the cAMP Signaling Pathway, and the PI3K-Akt Signaling Pathway in Response to Photoperiod.Marine biotechnology (New York, N.Y.) · 2026Article
- IL-22 Exacerbates Coxsackievirus Type B3-Induced Pancreatitis by Elevating Viral Replication Through STAT3 Activation.Immune network · 2025Article
- Impact of prenatal Di(2-ethylhexyl) phthalate exposure on pubertal development in female offspring rats: A focus on ERα-Mediated IGF-1/NKB crosstalk in the hypothalamus.Scientific reports · 2025Article
- Deciphering Aflatoxin B1 affected critical molecular pathways governing cancer: A bioinformatics study using CTD and PANTHER databases.Mycotoxin research · 2025Article
- An optimized fractionation method reveals insulin-induced membrane surface localization of GLUT1 to increase glycolysis in LβT2 cells.Molecular and cellular endocrinology · 2025Article
- PI(4,5)P2-dependent and -independent roles of PI4P in the control of hormone secretion by pituitary cells.Frontiers in endocrinology · 2023Review
- Identification and Characterization of Hypothalamic Alternative Splicing Events and Variants in Ovine Fecundity-Related Genes.Animals : an open access journal from MDPI · 2020Article
- The Anti-proliferative Activity of GnRH Through Downregulation of the Akt/ERK Pathways in Pancreatic Cancer.Frontiers in endocrinology · 2019Article
- Intrinsic and Regulated Gonadotropin-Releasing Hormone Receptor Gene Transcription in Mammalian Pituitary Gonadotrophs.Frontiers in endocrinology · 2017Review
- A-Kinase Anchoring Protein 4 (AKAP4) is an ERK1/2 substrate and a switch molecule between cAMP/PKA and PKC/ERK1/2 in human spermatozoa.Scientific reports · 2016Article
- Characterization of Gonadotrope Secretoproteome Identifies Neurosecretory Protein VGF-derived Peptide Suppression of Follicle-stimulating Hormone Gene Expression.The Journal of biological chemistry · 2016Article
Corrections and comments
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Authors and funding
8 authors at 5 institutions in 3 countries.
Funding
Abstract
The role of PI4K and PI3K-AKT in ERK1/2 activation by GnRH was examined. A relatively long preincubation (60 min) with wortmannin (10 nM and 10 μM), and LY294002 (10 μM and 100 μM) (doses known to inhibit PI3K and PI4K, respectively), were required to inhibit GnRH-and PMA-stimulated ERK1/2 activity in αT3-1 and LβT2 gonadotrope cells. A similar preincubation protocol was required to demonstrate inhibition of IGF-1-stimulated AKT activation lending support for the need of prolonged incubation (60 min) with wortmannin in contrast to other cellular systems. To rule out that the inhibitors acted upon PI(4,5)P2 levels, we followed the [Ca(2+)]i response to GnRH and found that wortmannin has no significant effect on GnRH-induced [Ca(2+)]i responses. Surprisingly, GnRH and PMA reduced, while IGF-1 increased AKT phosphorylation. We suggest that PI3K inhibits GnRH-stimulated αGSU activity, has no effect upon GnRH-stimulated LHβ activity and enhanced the GnRH-stimulated FSHβ transcription. Hence, PI4K and PI3K-AKT play a role in GnRH to ERK1/2 signaling, while PI3K may regulate also GnRH-induced gonadotropin gene expression.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.