Nitric oxide synthase expressions in ADR-induced cardiomyopathy in rats.
In this study, we investigate Nitric oxide synthase (NOS) expressions in adriamycin (ADR)-induced cadiomyopathy in rats. Sixty male Wistar rats were randomly divided into two main groups: control and ADR groups. Myocardial histopathological observation was performed; Expressions of 3 isoforms of NOS genes were examined by RT-PCR analysis; Expressions of 3 isoforms of NOS protein was assessed by Western blot analysis. Myocardium exhibited intensive morphological changes after 8 weeks of ADR treatment. The expression levels of inducible NOS (iNOS) gene and protein were significantly increased in ADRtreated rats after 8 weeks of treatment and then slightly increased at weeks 9 and 10. No significantly difference of neuronal NOS (nNOS) or endothelial NOS (eNOS) gene and protein were observed in the myocardium obtained from the control rats and ADR-injected rats at any time point. iNOS gene expression is selectively induced by ADR in heart. The upregulation of iNOS gene and protein may be somehow correlated with morphological changes seen in heart of rat treated with ADR.
Liu
Baogang
B
First Department of medicine, the Tumour Hospital of Harbin Medical University, Harbin, 150081, PR China.
Li
Hongli
H
Qu
Hongyan
H
Sun
Baogui
B
D000818:Animals; D009202:Cardiomyopathies / Q000139:chemically induced / Q000201:enzymology* / Q000378:metabolism; D004317:Doxorubicin; D015870:Gene Expression / Q000187:drug effects* / Q000502:physiology; D008297:Male; D009206:Myocardium / Q000473:pathology; D052248:Nitric Oxide Synthase Type I / Q000235:genetics / Q000378:metabolism*; D052247:Nitric Oxide Synthase Type II / Q000235:genetics / Q000378:metabolism*; D052250:Nitric Oxide Synthase Type III / Q000235:genetics / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar
D004317:Doxorubicin; D052248:Nitric Oxide Synthase Type I; D052247:Nitric Oxide Synthase Type II; D052250:Nitric Oxide Synthase Type III