[Relationship between angiotensin converting enzyme gene and ischemic stroke].
OBJECTIVE
To study relationship between angiotensin converting enzyme (ACE) gene and ischemic stroke (IS).


METHODS
(1)Four hundred and fifty-four patients and 334 controls were recruited in our study, their I/D polymorphisms of ACE gene were detected by polymerase chain reaction (PCR) and denaturing high performance liquid chromatogram, and their risk factors of IS were recorded at the same time. (2)In addition, 29 stroke-prone spontaneously hypertensive rats (SHR-SP) and 40 Sprague-Dawley (SD) rats were enrolled, and hypoxia- apnoea animal models and simple apnoea animal models were used at the same time. Their plasma angiotensin II (Ang II) levels were determined.


RESULTS
The frequencies of DD, ID and II genotype in IS patients were 22.5%, 43.4% and 34.1%, respectively, and 17.4%, 45.5% and 37.1%, respectively in controls. DD genotype was associated with large artery arteriosclerosis (LAA). Plasma Ang II level in SHR-SP group was (164.49+/-34.58) ng/L, and it was higher than that in control group [(150.92+/-24.92)ng/L] with no significant difference (P>0.05). Ang II levels in apnoea and hypoxia-apnoea group were (382.84+/-62.75) ng/L and (295.90+/-55.07) ng/L, respectively, and they were significantly higher than that in control group (all P<0.01). The relative risks of DD genotype and D alleles in IS patients with smoking, alcohol abuse, or with diabetes mellitus were higher than those in controls, but II genotype and I alleles were lower than those in controls.


CONCLUSIONS
DD genotype is a risk factor for IS, Ang II takes part in the course of hypoxia-stress, and it is correlated with smoking, alcohol abuse and diabetes mellitus in the pathogenesis of IS.
Li
Cai-ming
CM
Department of Neurology, Huizhou Central Hospital, Huizhou 516001, Guangdong, China. caiminglee@tom.com
Zhang
Cheng
C
Lu
Xi-lin
XL
Feng
Hui-yu
HY
Su
Quan-xi
QX
Zeng
Ying
Y
Zhang
Hong-lian
HL
Qiu
Shu-lian
SL
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000804:Angiotensin II / Q000097:blood; D000818:Animals; D001237:Asphyxia / Q000097:blood; D002545:Brain Ischemia / Q000235:genetics*; D004195:Disease Models, Animal; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D000860:Hypoxia / Q000097:blood; D008297:Male; D008875:Middle Aged; D007703:Peptidyl-Dipeptidase A / Q000235:genetics*; D011110:Polymorphism, Genetic; D051381:Rats; D011918:Rats, Inbred SHR; D017207:Rats, Sprague-Dawley; D012307:Risk Factors; D020521:Stroke / Q000235:genetics*
D000804:Angiotensin II; D007703:Peptidyl-Dipeptidase A