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Isolation of Small Preantral Follicles from the Bovine Ovary Using a Combination of Fragmentation, Homogenization, and Serial Filtration
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In vitro-growth and Gene Expression of Porcine Preantral Follicles Retrieved by Different Protocols
1Department of Animal Biotechnology, Kangwon National University, Chunchon 200-701, Korea.
Asian-Australasian Journal of Animal Sciences
|July 23, 2014
Summary
Mechanical isolation of porcine preantral follicles is superior for in vitro culture. This method preserves follicle morphology and enhances gene expression, leading to better follicular growth and potential for competent oocyte development.
Area of Science:
- Reproductive Biology
- Developmental Biology
- Animal Science
Background:
- Porcine preantral follicle isolation is crucial for in vitro studies.
- Optimizing isolation methods impacts subsequent follicular development and oocyte competence.
Purpose of the Study:
- To compare the effects of mechanical versus enzymatic isolation on porcine preantral follicle viability and in vitro growth.
- To evaluate the influence of isolation method on the expression of key folliculogenesis-related genes.
Main Methods:
- Porcine ovaries were processed using mechanical or enzymatic (collagenase) isolation techniques.
- Isolated preantral follicles were cultured in vitro for 4 days.
- Follicular morphology and mRNA expression of FSHR, LHR, Cx43, DNMT1, and FGFR2 were analyzed.
Main Results:
- Enzymatic retrieval yielded a higher number of follicles, but mechanical retrieval resulted in a greater percentage of morphologically normal follicles.
- Mechanically isolated follicles exhibited improved in vitro growth and higher proportions of normal morphology after culture.
- Significantly higher mRNA expression of FSHR, LHR, Cx43, DNMT1, and FGFR2 was observed in mechanically isolated follicles post-culture.
Conclusions:
- Mechanical isolation is a more effective method for preparing porcine preantral follicles for in vitro culture.
- This technique supports better follicular development and gene expression, crucial for producing competent oocytes.
