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Role of the MAPK cascade in mammalian germ cells
Q Y Sun1, H Breitbart, H Schatten
1Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri-Columbia, 65211, USA.
Abstract:
The mitogen-activated protein kinase (MAPK) cascade is one of the most important of the intracellular signaling pathways that play a crucial role in cell proliferation, cell differentiation and cell cycle regulation. Since the first report in 1993 of MAPK's involvement in the functional regulation of mammalian oocytes, much work has been done on the role of the MAPK cascade in germ cells in different species of mammals. This review describes the possible involvement of the MOS/MEK/MAPK/RSK cascade in spermatogenesis, sperm function, oocyte meiotic re-initiation, spindle assembly, metaphase II arrest, pronuclear formation and the entry of first mitosis, as well as the cross-talk of this cascade to maturation-promoting factor (MPF) and other signal molecules in mammals.
Insights
The mitogen-activated protein kinase (MAPK) cascade is vital for mammalian germ cell function, regulating processes from sperm development to egg maturation. This review details MAPK
Area of Science:
- Cell Biology
- Reproductive Biology
- Molecular Signaling
Background:
- The mitogen-activated protein kinase (MAPK) cascade is a critical intracellular signaling pathway involved in fundamental cellular processes.
- MAPK signaling has been recognized for its role in mammalian oocyte function since 1993, prompting extensive research.
Purpose of the Study:
- To review the involvement of the MOS/MEK/MAPK/RSK cascade in mammalian spermatogenesis and sperm function.
- To describe the role of the MAPK cascade in key events of oocyte meiosis and early embryonic development.
- To explore the interactions between the MAPK cascade and other signaling molecules, such as maturation-promoting factor (MPF).
Main Methods:
- Literature review of studies investigating the MAPK cascade in mammalian germ cells.
- Analysis of research on MAPK's role in spermatogenesis, sperm function, and oocyte meiotic processes.
- Examination of signaling cross-talk between MAPK and MPF.
Main Results:
- The MOS/MEK/MAPK/RSK cascade is implicated in various stages of male germ cell development and function.
- MAPK signaling is essential for oocyte meiotic re-initiation, spindle assembly, metaphase II arrest, and pronuclear formation.
- Cross-talk exists between the MAPK cascade and MPF, influencing critical reproductive events.
Conclusions:
- The MAPK cascade is a central regulator of mammalian gametogenesis and early embryonic progression.
- Understanding MAPK signaling pathways provides insights into reproductive health and potential therapeutic targets.