Nuclear condensation and fragmentation following cerebral hypoxia-ischemia occurs more frequently in immature than older rats.

Abstract:

:Apoptotic cell death is associated with condensation and fragmentation of the nuclear chromatin into apoptotic bodies. Such nuclei occur frequently following cerebral hypoxia-ischemia in 1 week old rats but seem sparse in older animals. We investigated the age dependence by counting pyknotic or punctate chromatin containing cells in the cerebral cortex of 1,2 and 4 week old animals subjected to cerebral hypoxia-ischemia. In 1 week old animals the majority of injured neurons in the cortex had nuclei with punctate condensed chromatin but few were pyknotic. In the 2 and 4 week old animals the majority of injured cells were pyknotic (P < 0.002). Electron microscopic studies demonstrated the presence of apoptotic bodies. The results suggest that immature brain retains a part of the developmental cell death "program' that is activated following hypoxia-ischemia.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Sidhu RS,Tuor UI,Del Bigio MR

doi

10.1016/s0304-3940(97)13426-7

subject

Has Abstract

pub_date

1997-02-21 00:00:00

pages

129-32

issue

2

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(97)13426-7

journal_volume

223

pub_type

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