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Effect of repeated allogeneic bone marrow mononuclear cell transplantation on brain injury following transient focal cerebral ischemia in rats.

Abstract：

AIMS:Transplantation of bone marrow mononuclear cells (BMMCs) exerts neuroprotection against cerebral ischemia. We examined the therapeutic timepoint of allogeneic BMMC transplantation in a rat model of focal cerebral ischemia, and determined the effects of repeated transplantation outside the therapeutic window. MAIN METHODS:Male Sprague-Dawley rats were subjected to 90 minute focal cerebral ischemia, followed by intravenous administration of 1 × 10(7) allogeneic BMMCs or vehicle at 0, 3 or 6 h after reperfusion or 2 × 10(7) BMMCs 6 h after reperfusion. Other rats administered 1 × 10(7) BMMCs at 6 h after reperfusion received additional BMMC transplantation or vehicle 9 h after reperfusion. Infarct volumes, neurological deficit scores and immunohistochemistry were evaluated 24 or 72 h after reperfusion. KEY FINDINGS:Infarct volumes at 24 h were significantly decreased in transplantation rats at 0 and 3 h, but not at 6 h, after reperfusion, compared to vehicle-treatment. Even high dose BMMC transplantation at 6h after reperfusion was ineffective. Repeated BMMC transplantation at 6 and 9h after reperfusion reduced infarct volumes and significantly improved neurological deficit scores at 24 and 72 h. Immunohistochemistry showed repeated BMMC transplantation reduced ionized calcium-binding adapter molecule 1, 4-hydroxy-2-nonenal and 8-hydroxydeoxyguanosine expression at 24 and 72 h after reperfusion. SIGNIFICANCE:Intravenous allogeneic BMMCs were neuroprotective following transient focal cerebral ischemia, and the therapeutic time window of BMMC transplantation was >3 h and <6 h after reperfusion in this model. Repeated transplantation at 6 and 9 h after reperfusion suppressed inflammation and oxidative stress in ischemic brains, resulting in improved neuroprotection.

journal_name

Life Sci

journal_title

Life sciences

authors

Kamiya F,Ueda M,Nito C,Kamiya N,Inaba T,Suda S,Saito T,Muraga K,Katayama Y

doi

10.1016/j.lfs.2013.12.016

subject

Has Abstract

pub_date

2014-01-24 00:00:00

pages

22-8

issue

1

eissn

0024-3205

issn

1879-0631

pii

S0024-3205(13)00773-X

journal_volume

95

pub_type

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