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Intensive Care Medicine
Published in: Intensive Care Medicine 9/2010

01-09-2010 | Experimental

Long-term evaluation of granulocyte-colony stimulating factor on hypoxic-ischemic brain damage in infant rats

Authors: Nancy Fathali, Tim Lekic, John H. Zhang, Jiping Tang

Published in: Intensive Care Medicine | Issue 9/2010

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Abstract

Purpose

Hypoxia-ischemia (HI), as a major cause of fetal brain damage, has long-lasting neurological implications. Therefore, therapeutic interventions that attenuate the neuropathological outcome of HI while also improving the neurofunctional outcome are of paramount clinical importance. The aim of this study was to investigate the long-term functional and protective actions of granulocyte-colony stimulating factor (G-CSF) treatment in an experimental model of cerebral HI.

Methods

Postnatal day-7 Sprague-Dawley rats were subjected to HI surgery, which entailed ligation of the right common carotid artery followed by 2 h of hypoxia (8% O2). Treatment consisted of subcutaneous injection of G-CSF at 1 h after hypoxia followed by an additional one injection per day for 5 days (6 total injections) or for 10 days (11 total injections). Animals were euthanized 5 weeks post-insult for extensive evaluation of neurological deficits and assessment of brain, spleen, heart, and liver damage.

Results

G-CSF treatment promoted somatic growth and prevented brain atrophy and underdevelopment of the heart. Moreover, reflexes, limb placing, muscle strength, motor coordination, short-term memory, and exploratory behavior were all significantly improved by both G-CSF dosing regimens.

Conclusions

Long-term neuroprotection afforded by G-CSF in both morphological and functional parameters after a hypoxic-ischemic event in the neonate provides a rationale for exploring clinical translation.
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Metadata
Title
Long-term evaluation of granulocyte-colony stimulating factor on hypoxic-ischemic brain damage in infant rats
Authors
Nancy Fathali
Tim Lekic
John H. Zhang
Jiping Tang
Publication date
01-09-2010
Publisher
Springer-Verlag
Published in
Intensive Care Medicine / Issue 9/2010
Print ISSN: 0342-4642
Electronic ISSN: 1432-1238
DOI
https://doi.org/10.1007/s00134-010-1913-6

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