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Updated: Jul 5, 2026
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Extraction, Labeling, and Purification of Lineage-Specific Cells from Human Antral Follicles
Published on: November 30, 2022
Follicular cells versus oocytes: cell population dynamics in the developing ovary
Marianthi Balla1, Roxani Angelopoulou, Giagkos Lavranos
1Department of Histology and Embryology, Medical School, Athens University, Greece. rangleop@med.uoa.gr
Tissue & Cell
|May 27, 2008
Summary
This study reveals distinct proliferation patterns for germ and follicular cells during rat ovarian development. Follicular cell proliferation increases postnatally, mirroring Sertoli cell kinetics, while germ cell proliferation peaks before birth and declines sharply afterward.
Area of Science:
- Developmental Biology
- Reproductive Biology
- Cell Kinetics
Background:
- Ovarian morphogenesis involves complex cell interactions between germ and somatic (follicular) cells.
- Understanding cell proliferation dynamics is crucial for comprehending normal ovarian development and potential abnormalities.
- Proliferation markers like PCNA and Ki-67 are widely used to assess cell cycle activity.
Purpose of the Study:
- To evaluate the correlation of germ and follicular cell kinetics during ovarian morphogenesis in Wistar rats.
- To analyze the expression patterns of proliferation markers PCNA and Ki-67 in developing rat ovaries.
Main Methods:
- Immunohistochemical detection of PCNA (using PC10 antibody) and Ki-67 (using NCL-Ki-67 antibody).
- Analysis of developing Wistar rat ovaries at various embryonic and postnatal stages (14.5 dpc to 7 dpp).
- Quantification of reactive/total cell ratios (labeling index) for germ and follicular cells using Image Pro Plus Software.
Main Results:
- Germ cell proliferation (PCNA) peaked at 18.5 dpc, significantly dropped at birth, and showed a secondary rise postnatally before declining.
- Follicular cell proliferation (PCNA and Ki-67) increased throughout the examined period, reaching a maximum at 7 dpp.
- PCNA labeling was generally more intense than Ki-67, suggesting differential cell cycle phase detection.
Conclusions:
- Follicular cell proliferation kinetics during ovarian development resemble those of Sertoli cells in the testis.
- Germ cell proliferation is highest during late embryonic development and decreases significantly after birth.
- The study highlights distinct temporal proliferation patterns of germ and follicular cells during rat ovarian morphogenesis.
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