NDLI: Chromatin configurations in the ferret germinal vesicle that reflect developmental competence for in vitro maturation.

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Year: 2009 Volume: 44 Issue: Supplementary 2

Year: 2009 Volume: 44 Issue: 1

Year: 2008 Volume: 43

Year: 2007 Volume: 42

Chromatin configurations in the ferret germinal vesicle that reflect developmental competence for in vitro maturation.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Sun, X. Li, Z. Yi, Y. Ding, W. Chen, J. Engelhardt, J. F. Leno, G. H.
Description	Country affiliation: United States Author Affiliation: Sun X ( Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, 51 Newton Road, Iowa City, IA 52242, USA)
Abstract	In several mammalian species, the configuration of germinal vesicle (GV) chromatin correlates with the developmental competence of oocytes. Yet, no study has been published on the configuration of GV chromatin in ferret, nor is it known whether a specific configuration predicts meiotic competence in this species, in spite of the potential importance of ferret cloning to the study of human disease and to species conservation efforts. Here, we report on an analysis of the chromatin configuration in ferret GV oocytes and on how they correlate with meiotic development. Three distinct configurations were identified based on the degree of chromatin condensation: (1) fibrillar chromatin (FC), featuring strands of intertwined chromatin occupying most of the visible GV region; (2) intermediate condensed chromatin (ICC), characterized by dense, irregular chromatin masses throughout the GV; and (3) condensed chromatin (CC), which is highly compact and centered around the nucleolus. We also found that chromatin configuration was related to the extent of association with cumulus cells in cumulus-oocyte complexes; CC-configured oocytes were most often surrounded by a compact cumulus layer and also a compact corona but FC-configured oocytes were associated with neither. In addition, increasing chromatin condensation corresponded to an increase in oocyte diameter. Finally, following in vitro culture, significantly more CC-configured oocytes underwent maturation to meiotic metaphase II than did FC- or ICC-configured oocytes. We conclude that, in ferret, chromatin condensation is related to the sequential achievement of meiotic competencies during oocyte growth and differentiation, and thus can be used as a predictor of competence.
File Format	HTM / HTML
ISSN	09366768
e-ISSN	14390531
DOI	10.1111/j.1439-0531.2008.01076.x
Journal	Reproduction in Domestic Animals
Issue Number	2
Volume Number	44
Language	English
Publisher	Wiley
Publisher Date	2009-04-01
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Discipline Reproductive Medicine Discipline Veterinary Medicine Discipline Zoology Chromatin Ultrastructure Ferrets Meiosis Physiology Oocytes Growth & Development Animals Cell Size Cells, Cultured Microscopy, Fluorescence Ovarian Follicle Cytology Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Endocrinology Biotechnology

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Chromatin Configurations in the Ferret Germinal Vesicle that Reflect Developmental Competence for In Vitro Maturation

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Chromatin configurations in the ferret germinal vesicle that reflect developmental competence for in vitro maturation.

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Chromatin Configurations in the Ferret Germinal Vesicle that Reflect Developmental Competence for In Vitro Maturation

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