PMID: 18184458Jan 11, 2008Paper

Correlation of TGF-beta1 mRNA expression to irradiation-induced heart damage in rats

Ai zheng = Aizheng = Chinese journal of cancer
Hui LiuYue-Hao Lin

Abstract

Radiation-induced heart damage is one of the prognostic factors of the patients who had received radiation to the mediastinum. This study was to investigate the correlation of transforming growth factor-beta1 (TGF-beta1) mRNA expression to the radiation response of the heart in rats, in order to provide references for further study on irradiation-induced heart damage. Sixty Sprague-Dawley rats were divided into 2 groups: the 30 rats in irradiation group were irradiated with 20 Gy on the heart; the 30 rats in control group received no irradiation. At each time point of the 1st day, the 2nd, 4th, 8th 12th, and 24th week after irradiation, 5 rats in each group were killed. The serum levels of cardiac troponin and isoenzyme of creatine kinase (CK-MB) were detected. The expression of TGF-beta1 mRNA was detected by polymerase chain reaction (PCR). Heart damage was observed with Masson staining under microscope. The serum level of cardiac troponin was elevated at 24 h after irradiation, and reached the peak at 2 weeks after irradiation, which was significantly higher than that in control group [(0.73+/-0.11) ng/mL vs. (0.11+/-0.04) ng/mL, P<0.05]. There was no significant difference in the serum level of CK-MB between two groups (P>0....Continue Reading

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