Document Detail

Ultrastructural study of cat zona pellucida during oocyte maturation and fertilization.
MedLine Citation:
PMID:  17988809     Owner:  NLM     Status:  MEDLINE    
The mammalian zona pellucida (ZP) is an extracellular glycoprotein structure formed around growing oocytes, ovulated eggs and preimplantation embryos. The specific functions of ZP are highly determined by its morphological structure. Studies on cat oocytes during maturation and after fertilization were undertaken, using routine transmission (TEM) and scanning electron microscopy (SEM). Two basic ZP layers - outer with rough spongy appearance and inner with smaller fenestrations and smooth fibrous network - were visible. Deposits, secreted by oviductal cells formed new layer, the so called oviductal ZP. After fertilization outer ZP showed rougher meshed network due to fusion between filaments as a consequence from sperm penetration while the inner was smoother with melted appearance. The presented data on the SEM and TEM characteristics of cat oocytes, together with our previous studies on carbohydrate distribution suggest that during oocyte maturation and fertilization ZP undergoes structural and functional rearrangements related to sperm binding and penetration.
Yordanka Martinova; Malcho Petrov; Margarita Mollova; Pavel Rashev; Maria Ivanova
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Publication Detail:
Type:  Journal Article     Date:  2007-10-02
Journal Detail:
Title:  Animal reproduction science     Volume:  108     ISSN:  1873-2232     ISO Abbreviation:  Anim. Reprod. Sci.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-09-15     Completed Date:  2008-12-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7807205     Medline TA:  Anim Reprod Sci     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  425-34     Citation Subset:  IM    
Institute of Experimental Morphology and Anthropology with Museum, Bulgarian Academy of Sciences, Sofia, Bulgaria.
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MeSH Terms
Cats / anatomy & histology,  physiology*
Fertilization in Vitro / veterinary
Microscopy, Electron, Scanning / veterinary
Microscopy, Electron, Transmission / veterinary
Oocytes / physiology,  ultrastructure*
Zona Pellucida / physiology,  ultrastructure*

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