Effects of adenovirus-mediated delivery of the human hepatocyte growth factor gene in experimental radiation-induced heart disease.
OBJECTIVE
Irradiation to the heart may lead to late cardiovascular complications. The purpose of this study was to investigate whether adenovirus-mediated delivery of the human hepatocyte growth factor gene could reduce post-irradiation damage of the rat heart and improve heart function.


METHODS
Twenty rats received single-dose irradiation of 20 Gy gamma ray locally to the heart and were randomized into two groups. Two weeks after irradiation, these two groups of rats received Ad-HGF or mock adenovirus vector intramyocardial injection, respectively. Another 10 rats served as sham-irradiated controls. At post-irradiation Day 120, myocardial perfusion was tested by myocardial contrast echocardiography with contrast agent injected intravenously. At post-irradiation Day 180, cardiac function was assessed using the Langendorff technique with an isolated working heart model, after which heart samples were collected for histological evaluation.


RESULTS
Myocardial blood flow was significantly improved in HGF-treated animals as measured by myocardial contrast echocardiography at post-irradiation Day 120 . At post-irradiation Day 180, cardiac function was significantly improved in the HGF group compared with mock vector group, as measured by left ventricular peak systolic pressure (58.80 +/- 9.01 vs. 41.94 +/- 6.65 mm Hg, p < 0.05), the maximum dP/dt (5634 +/- 1303 vs. 1667 +/- 304 mm Hg/s, p < 0.01), and the minimum dP/dt (3477 +/- 1084 vs. 1566 +/- 499 mm Hg/s, p < 0.05). Picrosirius red staining analysis also revealed a significant reduction of fibrosis in the HGF group.


CONCLUSIONS
Based on the study findings, hepatocyte growth factor gene transfer can attenuate radiation-induced cardiac injury and can preserve cardiac function.
Hu
Shunying
S
Department of Cardiology, Chinese PLA General Hospital, Beijing, People's Republic of China.
Chen
Yundai
Y
Li
Libing
L
Chen
Jinlong
J
Wu
Bin
B
Zhou
Xiao
X
Zhi
Guang
G
Li
Qingfang
Q
Wang
Rongliang
R
Duan
Haifeng
H
Guo
Zikuan
Z
Yang
Yuefeng
Y
Xiao
Fengjun
F
Wang
Hua
H
Wang
Lisheng
L
D000256:Adenoviridae; D000818:Animals; D001391:Azo Compounds; D001794:Blood Pressure / Q000502:physiology; D004396:Coloring Agents; D003287:Contrast Media / Q000008:administration & dosage; D003326:Coronary Circulation / Q000502:physiology; D005260:Female; D018014:Gene Transfer Techniques; D005822:Genetic Vectors / Q000008:administration & dosage / Q000235:genetics*; D049452:Green Fluorescent Proteins / Q000378:metabolism; D006321:Heart / Q000502:physiology / Q000528:radiation effects*; D006331:Heart Diseases / Q000209:etiology / Q000517:prevention & control; D017228:Hepatocyte Growth Factor / Q000235:genetics* / Q000378:metabolism / Q000627:therapeutic use; D006801:Humans; D009200:Myocardial Contraction / Q000502:physiology; D009206:Myocardium / Q000378:metabolism / Q000473:pathology; D011833:Radiation Injuries, Experimental / Q000209:etiology / Q000378:metabolism / Q000517:prevention & control*; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D016277:Ventricular Function, Left / Q000502:physiology
D001391:Azo Compounds; D004396:Coloring Agents; D003287:Contrast Media; C066855:HGF protein, human; C009798:C.I. direct red 80; D049452:Green Fluorescent Proteins; D017228:Hepatocyte Growth Factor