Document Detail

Cell death in late embryogenesis of the leech Helobdella.
MedLine Citation:
PMID:  10502108     Owner:  NLM     Status:  MEDLINE    
Cell death was characterized during stages 8 and 9 in the leech Helobdella with a modified terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling method. Using confocal analysis, the positions of dying cells were compared to rows of cells expressing the leech engrailed protein ht-en and to fluorescently marked cell lineages. Dying cells were present in diverse tissues. Some dying cells were in no obvious pattern, and others were in segmentally iterated patterns. Particular attention was paid to the ectoderm and mesoderm, where most of the cells examined died over a period equivalent to 1-4 h at 25 degrees C. Segmentally iterated rows of dying cells were observed in the mesoderm just beneath the nf-derived ht-en expressing cell rows at a time when ht-en expressing cells were beginning to disappear. The position of these dying cell rows was consistent with a role in the partial deterioration of the septum.
R Tsubokawa; C J Wedeen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Development genes and evolution     Volume:  209     ISSN:  0949-944X     ISO Abbreviation:  Dev. Genes Evol.     Publication Date:  1999 Sep 
Date Detail:
Created Date:  1999-12-17     Completed Date:  1999-12-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9613264     Medline TA:  Dev Genes Evol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  515-25     Citation Subset:  IM    
Department of Cell Biology and Anatomy, New York Medical College, Valhalla, NY 10595, USA.
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MeSH Terms
Cell Death
Cell Division
Embryo, Nonmammalian / cytology*,  physiology
In Situ Nick-End Labeling
Leeches / embryology*
Microscopy, Confocal

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