| Expression of bcl-2 and 3-beta hydroxysteroid dehydrogenase protein during oocyte and follicle development in fetal and post-natal pig ovaries. | |
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MedLine Citation:
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PMID: 11101284 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The fetal and post-natal development of the pig ovary involves both proliferation and apoptotic loss of germ cells, follicle formation and growth, and the initiation of oocyte meiotic maturation. The present study measured the expression of the proto-oncogene Bcl-2 immunohistochemically on paraffin sections of pig ovaries to determine its relationship with folliculogenesis on Days 50 and 80 post coitum (p.c.) and on Days 1, 21, and 56 post partum (p.p.). The expression of the steroidogenic enzyme 3beta-hydroxysteroid dehydrogenase (3betaHSD) was used to determine the lineages of the cells forming the ovarian follicles, and the expression of the cell proliferation-associated nuclear antigen Ki-67 was used to determine germ cell proliferation and the initiation of follicle growth. Expression of Ki-67 showed that many oogonia were proliferating on Days 50 and 80 p.c. Granulosa cells were more proliferative on Day 56 p.p. than at any other stage; Ki-67 was expressed in 70% of growing follicles and granulosa cells had a 3% mean staining index per section. Less than 4% of germ cells and follicles had morphological signs of degeneration during the period of the study. Bcl-2 was most abundant on Days 21 p.p. and 56 p.p.; staining was localized to stromal cells among follicles and in small clusters in the cortical medullary junction (CMJ). 3BetaHSD staining on Day 50 p.c. was seen in cords of stromal cells within the medulla of the ovary, and in the stromal cells investing the oogonial nests. On Days 80 p.c., 1 p.p., 21 p.p., and 56 p.p., 3betaHSD was expressed in the granulosa cells of primary or primordial follicles at the CMJ. Production of Bcl-2 by somatic cells may support germ cell and preantral follicle survival. |
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Authors:
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W M Garrett; H D Guthrie |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Reproduction, fertility, and development Volume: 11 ISSN: 1031-3613 ISO Abbreviation: Reprod. Fertil. Dev. Publication Date: 1999 |
Date Detail:
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Created Date: 2000-12-06 Completed Date: 2000-12-22 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8907465 Medline TA: Reprod Fertil Dev Country: AUSTRALIA |
Other Details:
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Languages: eng Pagination: 463-70 Citation Subset: IM |
Affiliation:
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Germplasm and Gamete Physiology Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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3-Hydroxysteroid Dehydrogenases
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genetics* Animals Apoptosis Cell Nucleus / ultrastructure Cytoplasm / ultrastructure Female Gene Expression Ki-67 Antigen / analysis Oocytes / physiology*, ultrastructure Ovarian Follicle / growth & development* Ovary / embryology, growth & development*, metabolism Pregnancy Proto-Oncogene Proteins c-bcl-2 / genetics* Stromal Cells Swine* |
| Chemical | |
Reg. No./Substance:
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0/Ki-67 Antigen; 0/Proto-Oncogene Proteins c-bcl-2; EC 1.1.-/3-Hydroxysteroid Dehydrogenases |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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