Document Detail

Effect of hypophysectomy and starvation on the fine structure of vitellogenic oocytes in the newt, Triturus pyrrhogaster (Laur).
MedLine Citation:
PMID:  6892135     Owner:  NLM     Status:  MEDLINE    
Hypophysectomy and starvation in Triturus pyrrhogaster result in a similar ultrastructural pattern of follicular atresia. The first detectable change in the oocytes is decrease in the size and number of microvilli. Subsequently the yolk precursor bodies (YPB) disappear from the micropinocytotic vesicles and the mitochondria degenerate. Finally the yolk platelets undergo decomposition. The smaller yolk platelets disintegrate by granulation, vacuolation and lobule formation. The larger platelets, after losing their superficial layer and the inner crystalline lattice, are surrounded by a laminated membrane complex. The pattern of yolk breakdown is comparable to that during development. A rather delayed effect is observed on the nucleolus of the oocytes. Pigment granules seem to play an important role in the proteolysis of the yolk.
N H Dutt; S Inoue
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Zeitschrift für mikroskopisch-anatomische Forschung     Volume:  96     ISSN:  0044-3107     ISO Abbreviation:  Z Mikrosk Anat Forsch     Publication Date:  1982  
Date Detail:
Created Date:  1983-07-08     Completed Date:  1983-07-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0413637     Medline TA:  Z Mikrosk Anat Forsch     Country:  GERMANY, EAST    
Other Details:
Languages:  eng     Pagination:  937-47     Citation Subset:  IM    
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MeSH Terms
Hypophysectomy / adverse effects*
Microscopy, Electron
Oocytes / growth & development,  ultrastructure*
Ovum / ultrastructure*
Salamandridae / anatomy & histology*,  physiology
Starvation / complications*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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