Granulosa Cell Survival Mechanisms in Ovarian Follicle Development
Summary
Granulosa cells are specialised somatic cells that envelop the oocyte at every stage of follicle growth, providing essential metabolic support, paracrine factors and steroid hormones. Their survival and function depend on a finely balanced network of endocrine signals such as follicle-stimulating hormone (FSH), local growth factors and intracellular stress responses. Key survival pathways include PI3K-AKT and MAPK/ERK signalling, which inhibit apoptotic cascades and promote cellular proliferation. Simultaneously, adaptive processes such as autophagy and mitophagy maintain organelle quality and energy homeostasis under fluctuating metabolic demands. Controlled removal of excess follicles through apoptosis, autophagic cell death and other regulated mechanisms ensures selection of high-quality oocytes, while dysregulation of these processes underlies follicular atresia, ovarian ageing and disorders of fertility. Emerging insights into the molecular interplay between epigenetic modifiers, reactive oxygen species and death-regulating kinases highlight novel targets for preserving ovarian reserve and improving assisted-reproduction outcomes.
Research from Nature Portfolio
Recent studies have uncovered a pivotal role for FSH in safeguarding granulosa cells against oxidative injury by modulating mitophagy. Under oxidative stress, FSH was shown to suppress the PINK1-Parkin pathway, reducing mitochondrial clearance and thereby preventing cell loss. By inhibiting excessive mitophagy, granulosa cell viability and steroidogenic competence are maintained, suggesting that targeted regulation of mitochondrial quality control may offer new avenues for enhancing follicle resilience during ageing or gonadotoxic treatments.
Granulosa Cell Survival Mechanisms in Ovarian Follicle Development publication trend
The graph below shows the total number of articles in granulosa cell survival mechanisms in ovarian follicle development across all publications each year (not limited to Nature Index journals).
Technical terms
Granulosa cell: Somatic ovarian cell surrounding the oocyte that supports its growth and hormone production.
Follicular atresia: Programmed degeneration and resorption of ovarian follicles that do not reach ovulation.
Apoptosis: Regulated cell death characterised by caspase activation, DNA fragmentation and cell shrinkage.
Autophagy: Lysosome-mediated degradation of cytoplasmic components to maintain cellular homeostasis under stress.
Mitophagy: Selective autophagic removal of damaged or superfluous mitochondria to preserve organelle quality.
Reactive oxygen species (ROS): Chemically reactive oxygen-derived molecules that can cause oxidative damage.
Follicle-stimulating hormone (FSH): Gonadotropin that promotes granulosa cell proliferation, differentiation and steroidogenesis.
References
- Beyond apoptosis: evidence of other regulated cell death pathways in the ovary throughout development and life. Human Reproduction Update (2023).
- LSD1 promotes the FSH responsive follicle formation by regulating autophagy and repressing Wt1 in the granulosa cells. Science Bulletin (2024).
- FSH protects mouse granulosa cells from oxidative damage by repressing mitophagy. Scientific Reports (2016).
- Mechanisms of and Potential Medications for Oxidative Stress in Ovarian Granulosa Cells: A Review. International Journal of Molecular Sciences (2023).
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