1. Primordial follicle assembly was regulated by notch signaling pathway in the mice
- Author
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Jin-Mei Ma, Jun-Jie Wang, Lin-Qing Wang, Lan Li, Xia-Fei Fu, Guo-Bo Quan, Wei Shen, Shun-Feng Cheng, Zhu-Mei Hou, Chun-Lei Chen, and Hua-Gang Ma
- Subjects
medicine.medical_specialty ,Cell signaling ,Cell Survival ,Notch signaling pathway ,Apoptosis ,Biology ,Mice ,FIGLA ,Ovarian Follicle ,Internal medicine ,Basic Helix-Loop-Helix Transcription Factors ,Genetics ,medicine ,Animals ,Serrate-Jagged Proteins ,Receptor, Notch2 ,Receptor, Notch1 ,HES1 ,Molecular Biology ,Homeodomain Proteins ,Calcium-Binding Proteins ,Membrane Proteins ,General Medicine ,Cell biology ,Germ Cells ,Endocrinology ,medicine.anatomical_structure ,Oocytes ,Intercellular Signaling Peptides and Proteins ,Transcription Factor HES-1 ,Jagged-1 Protein ,Female ,Germ line development ,Folliculogenesis ,Germ cell ,Signal Transduction - Abstract
Notch signaling pathway, a highly conserved cell signaling system, exists in most multicellular organisms. The objective of this study was to examine Notch signaling pathway in germ cell cyst breakdown and primordial follicle formation. The receptor and ligand genes of Notch pathway (Notch1, Notch2, Jagged1, Jagged2 and Hes1) were extremely down-regulated after newborn mouse ovaries were cultured then exposed to DAPT or L-685,458 in vitro (P < 0.01). Since DAPT or L-685,548 inhibits Notch signaling pathway, the expression of protein LHX8 and NOBOX was significantly reduced during the formation of the primordial follicles. Down-regulated mRNA expression of specific genes including Lhx8, Figla, Sohlh2 and Nobox, were also observed. The percentages of female germ cells in germ cell cysts and primordial follicles were counted after culture of newborn ovaries for 3 days in vitro. The result showed female germ cells in cysts was remarkably up-regulated while as the oocytes in primordial follicles was significantly down-regulated (P < 0.05). In conclusion, Notch signaling pathway may regulate the formation of primordial follicle in mice.
- Published
- 2014