Acute regional neuronal injury following hypothermic circulatory arrest in a porcine model.

Abstract:

OBJECTIVES:Although deep hypothermic circulatory arrest (HCA) is routinely used to interrupt normal perfusion of the brain and prevent subsequent cerebral ischemic injury during cardiac surgery, it is associated with various forms of neurologic disturbances. Neurologic sequelae after prolonged HCA include motor, memory and cognitive deficits. The present study was designed to assess acute regional neuronal injury after HCA in an animal model. METHODS:Six piglets underwent 75 min of HCA at 18 degrees C. Four piglets served as normal controls. After gradual rewarming and reperfusion, treatment animals were killed and their brains were perfusion-fixed and cryopreserved. Regional patterns of neuronal apoptosis after HCA was characterized by in situ DNA fragmentation using terminal deoxyneucleotidyl-transferase-mediated biotin-dUTP nick end-labeling (TUNEL) histochemistry. Hematoxylin and eosin histology was used to characterize cell damage morphologically. TUNEL-positive cells were scored on a scale of 0 to 5. Grade 0: no TUNEL-positive cells; Grade 1: <10%, Grade 2: 10-25%, Grade 3: 25-50%, Grade 4: 50-75%; and Grade 5: >75%. RESULTS:TUNEL-positive cells indicating DNA-fragmentation were scored in the precentral gyrus (motor neocortex), postcentral gyrus (sensory neocortex), hippocampus, cerebellum, thalamus and ventral medulla of HCA treated animals and were significantly greater than in normal controls (P

authors

Ananiadou OG,Drossos GE,Bibou KN,Palatianos GM,Johnson EO

doi

10.1510/icvts.2005.112813

subject

Has Abstract

pub_date

2005-12-01 00:00:00

pages

597-601

issue

6

eissn

1569-9293

issn

1569-9285

pii

icvts.2005.112813

journal_volume

4

pub_type

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