Journal
SCIENCE
Volume 324, Issue 5929, Pages 938-941Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1171396
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Funding
- NIH [NIH-HD16229, NIH-HD07495, NIH-HD07165]
- Project II
- Japan Society for the Promotion of Science [18688016]
- Intramural Research Program of NIH
- National Cancer Institute, Center for Cancer Research
- Grants-in-Aid for Scientific Research [18688016] Funding Source: KAKEN
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A surge of luteinizing hormone (LH) from the pituitary gland triggers ovulation, oocyte maturation, and luteinization for successful reproduction in mammals. Because the signaling molecules RAS and ERK1/2 ( extracellular signal-regulated kinases 1 and 2) are activated by an LH surge in granulosa cells of preovulatory follicles, we disrupted Erk1/2 in mouse granulosa cells and provide in vivo evidence that these kinases are necessary for LH-induced oocyte resumption of meiosis, ovulation, and luteinization. In addition, biochemical analyses and selected disruption of the Cebpb gene in granulosa cells demonstrate that C/EBPb (CCAAT/Enhancer-binding protein-beta) is a critical downstream mediator of ERK1/2 activation. Thus, ERK1/2 and C/EBPb constitute an in vivo LH-regulated signaling pathway that controls ovulation- and luteinization-related events.
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