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Interactions between somatic cells and germ cells throughout mammalian oogenesis
R Buccione1, A C Schroeder, J J Eppig
1Jackson Laboratory, Bar Harbor, Maine 04609.
Biology of Reproduction
|October 1, 1990
Summary
Oocytes and somatic cells are interdependent, with somatic cells regulating oocyte development and maturation. The oocyte also influences somatic cell proliferation and differentiation, highlighting a crucial bidirectional relationship.
Area of Science:
- Reproductive Biology
- Cell Biology
- Developmental Biology
Background:
- Oocyte and somatic cell association is vital for oogenesis and follicular development.
- Somatic cells regulate key oocyte processes including growth, meiotic arrest, maturation, and developmental competence.
Purpose of the Study:
- To review the regulatory roles of somatic cells in mammalian oocyte development.
- To explore the bidirectional interactions between oocytes and follicular somatic cells.
Main Methods:
- Review of current literature on oocyte-somatic cell interactions.
- Analysis of gap junction involvement in regulatory processes.
- Examination of oocyte-secreted factors influencing somatic cell behavior.
Main Results:
- Somatic cells, likely via gap junctions, regulate oocyte growth, meiotic arrest, maturation, and developmental competence.
- Oocytes secrete factors promoting cumulus cell hyaluronic acid synthesis and granulosa cell proliferation.
- Oocyte-derived factors influence granulosa cell differentiation into cumulus cells, requiring close cell association.
Conclusions:
- Oocyte and somatic cell interactions are bidirectional and essential for reproductive success.
- Gap junctions mediate somatic cell regulation of oocytes, while oocyte factors influence somatic cell development.
- This interdependence is critical for normal oocyte and follicular development.