Comparison of recombinant growth differentiation factor-9 and oocyte regulation of KIT ligand messenger ribonucleic acid expression in mouse ovarian follicles.
Oocytes secrete factors that regulate the development of the surrounding granulosa cells in ovarian follicles. KIT ligand (KL) mRNA expression in granulosa cells is thought to be regulated by oocytes; however, the factor(s) that mediate this effect are not known. One candidate is the oocyte-specific gene product growth differentiation factor-9 (GDF-9). This study examined the effect of recombinant GDF-9 (rGDF-9) on steady-state KL mRNA expression levels in preantral and mural granulosa cells in vitro. Furthermore, the study compared the effect of rGDF-9 with that of coculture with oocytes at different developmental stages. As determined by RNase protection assay, both KL-1 and KL-2 mRNA levels in preantral and mural granulosa cells were suppressed by 25-250 ng/ml rGDF-9. Fully grown oocytes also suppressed both KL-1 and KL-2 mRNA expression levels. Partly grown oocytes isolated from 7-, 10-, or 12-day-old mice either had no effect on KL mRNA levels or promoted KL-1 mRNA steady-state expression. It is concluded that GDF-9 is likely to mediate the action of fully grown, but not partly grown, oocytes on granulosa cell KL mRNA expression.
Joyce
I M
IM
The Jackson Laboratory, Bar Harbor, Maine 04609, USA.
Clark
A T
AT
Pendola
F L
FL
Eppig
J J
JJ
D000818:Animals; D055430:Bone Morphogenetic Protein 15; D002469:Cell Separation; D002478:Cells, Cultured; D005260:Female; D006107:Granulosa Cells / Q000187:drug effects / Q000378:metabolism / Q000502:physiology; D055429:Growth Differentiation Factor 9; D006133:Growth Substances / Q000494:pharmacology*; D036341:Intercellular Signaling Peptides and Proteins; D051379:Mice; D008810:Mice, Inbred C57BL; D023282:Nuclease Protection Assays; D009865:Oocytes / Q000254:growth & development / Q000502:physiology*; D006080:Ovarian Follicle / Q000187:drug effects / Q000378:metabolism* / Q000502:physiology; D011247:Pregnancy; D012333:RNA, Messenger / Q000096:biosynthesis* / Q000235:genetics; D011994:Recombinant Proteins / Q000494:pharmacology; D019089:Stem Cell Factor / Q000096:biosynthesis* / Q000235:genetics
C525902:Bmp15 protein, mouse; D055430:Bone Morphogenetic Protein 15; C525898:Gdf9 protein, mouse; D055429:Growth Differentiation Factor 9; D006133:Growth Substances; D036341:Intercellular Signaling Peptides and Proteins; D012333:RNA, Messenger; D011994:Recombinant Proteins; D019089:Stem Cell Factor