Migration of enhanced green fluorescent protein labeled bone marrow after transplantation into rat cerebral infarct
- VernacularTitle:绿色荧光蛋白标记的骨髓间充质干细胞在脑缺血大鼠体内迁移的实验研究
- Author:
Ye WANG
;
Yubin DENG
;
Yan LI
;
Weibiao YE
;
Meihong YE
- Publication Type:Journal Article
- Keywords:
Bone marrow stromal cells;
Stromal cell-derived factor-1?;
CXC chemokine receptor 4;
Brain ischemia
- From:
Chinese Journal of Pathophysiology
1986;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To investigate the role of SDF-1? in migrating of bone marrow stromal cells to the injured areas. METHODS:Ischemic brain lesion model was created in rats by permanent middle cerebral artery occlusion (MCAO). 48 SD rats were divided randomly into 2 groups. Group 1:phosphate buffered saline (PBS 1 mL) for control (n=25); Group 2:BMSCs (2?106) were injected intravenously at 24 h after MCAO (n=24). After propagated in BMSCs,Ad5/F35 GFP (green fluorescent protein) was infected to BMSCs. The expression of SDF-1? (stromal cell-derived factor-1?) mRNA in the penrumbral tissue was assayed by real-time quantitative PCR. The expression of CXCR4 on MSCs was detected by flow cytometry. Confocal microscopy was used to detect the GFP-labeled MSCs migration. RESULTS:Ad5/F35 GFP signals was observed in almost infected BMSCs. The expressions of SDF-1? mRNA in the thalamus and hippocampus of the ischemic brains were peaked at 3rd day after stroke,followed by a decrease at 14th day post-ischemia. The expression of SDF-1? mRNA in the cortex of the ischemic brains was peaked at 7th day post-ischemia,still at high level at 14th day post-ischemia. The median percentage of surface CXCR4 expression in BMSCs was 14%. GFP labeled BMSCs were detected in the origination of the middle cerebral artery (olfactory area) at 6 h,after 3 days in the prenumbra tissue such as thalamus,and in the cortex more labeled cells were found after 14 d post-ischemia.CONCLUSION:BMSCs can pass through the blood brain barrier of ischemic rats. Its mechanism might be associated with the expression of SDF-1? in the ischemic brain.
