[Changes of mitochondrial genes expressed in the brain tissue of rat in stroke-like episodes rats].
OBJECTIVE
Stroke is a complex disorder caused by a combination of genetic and environmental factors. Epidemiological studies have provided evidence of genetic influence on the development of human stroke. However, genetic changes which contribute to the development of stroke are not well known. This study was designed to gain a deep insight into that aspect.


METHODS
Using cold-stimuli plus high-salt intake as environmental risk factors, the authors established a hypertension model in rats, which produced a complication of stroke. Then, they used the suppression subtractive hybridization(SSH) technique to identify the differential genes that specifically expressed in total cerebrum tissue of the rats in stroke group. A comparison was made between two populations, namely the control group and stroke group.


RESULTS
By the use of SSH approach, a total of 576 clones were generated in this study from two subtractive libraries, among them 456 clones were usable and were analyzed. Genes for metabolism transcripts in stroke group were shown to be up-regulated (P<0.01). Mitochondrial transcripts were observed in a high rate of 26.5%.


CONCLUSIONS
The findings suggested that mitochondrial genes should induce an increased sensitivity to stroke through the changes of gene expressions. Mitochondrial genes probably play important roles in the causes and effects of stroke.
Wang
Xian-mei
XM
Department of Cardiology, Kunming General Hospital, Chengdu Military Area, Kunming, Yunnan, 650032 PR China. wangxianmei89@yahoo.com
Yang
Li-xia
LX
Yan
Rui
R
Zhu
Shan-jun
SJ
Guo
Chuan-ming
CM
Qi
Feng
F
Zhao
Bin
B
Zhang
Qian
Q
Hui
Ru-tai
RT
D000818:Animals; D001921:Brain / Q000378:metabolism* / Q000473:pathology; D004272:DNA, Mitochondrial / Q000235:genetics*; D005786:Gene Expression Regulation; D008297:Male; D009154:Mutation; D051381:Rats; D017208:Rats, Wistar; D020521:Stroke / Q000209:etiology / Q000235:genetics* / Q000473:pathology
D004272:DNA, Mitochondrial