Granulosa Cell Biology and Oocyte Maturation
Summary
Ovarian granulosa cells comprise a dynamic population of somatic cells that envelop the developing oocyte within the ovarian follicle. During folliculogenesis, granulosa cells proliferate under the influence of follicle-stimulating hormone, differentiate into mural granulosa cells that regulate steroidogenesis and cumulus cells that form the cumulus-oocyte complex. Through direct contacts via gap junctions and paracrine signalling, these cells supply metabolites, growth factors and regulatory RNAs that are essential for oocyte growth, meiotic arrest and subsequent resumption of maturation. Granulosa–oocyte communication orchestrates cyclic changes in cyclic AMP and calcium fluxes, modulates enzyme cascades such as SMAD and PI3K pathways and ensures timely chromatin remodelling and cytoskeletal reorganisation in the oocyte. In parallel, granulosa cells regulate the follicular microenvironment by balancing angiogenic factors and reactive oxygen species to support cumulus expansion and avoid premature atresia. Understanding this interplay has profound implications for human and animal fertility, enabling refinement of in vitro maturation protocols, improved biomarker discovery for oocyte competence and development of novel therapeutic strategies to address infertility and optimise livestock breeding programmes.
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Granulosa Cell Biology and Oocyte Maturation publication trend
The graph below shows the total number of articles in granulosa cell biology and oocyte maturation across all publications each year (not limited to Nature Index journals).
Technical terms
Granulosa cell: Somatic ovarian cell enveloping the oocyte that supports its development and hormone production.
Cumulus cell: Subtype of granulosa cell forming the immediate oocyte-associated matrix, mediating nutrient and signal exchange.
Folliculogenesis: Sequence of events leading from primordial follicle activation to ovulation or atresia.
Steroidogenesis: Biosynthetic pathway by which granulosa cells produce oestrogens and progesterone.
Gap junction: Intercellular channel allowing direct cytoplasmic communication between oocyte and granulosa cells.
Transcriptome: Complete set of RNA transcripts within a cell population reflecting gene expression dynamics.
References
- Effects of Astaxanthin on the Physiological State of Porcine Ovarian Granulose Cells Cultured In Vitro. Antioxidants (2024).
- Cumulus Cell Transcriptome after Cumulus-Oocyte Complex Exposure to Nanomolar Cadmium in an In Vitro Animal Model of Prepubertal and Adult Age. Biology (2023).
- Transcriptomic Profile of New Gene Markers Encoding Proteins Responsible for Structure of Porcine Ovarian Granulosa Cells. Biology (2021).
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