ABSTRACT
Objective To investigate the effect of extraction of radix isatidis on the expression of transforming growth factor(TGF-β)in lung tissues of rats with radioactive lung injury.Methods 72 female Wistar rats were randomly divided into 3 groups,blank control group(groupA,n=24),simple irradiation group(group B,n=24),irradiation with Chinese medicine group(group C,n=24).Rats in group A and group B were given distilled water 2 mL/200g by gavage for one week,the rats in group C were given extraction of radix isatidis 2 mL/200g(1.6 g/200 g)per day for one week,then the rats received irradiation,during irradiation,the rats' weight was measured once a week,to illuminate the end.After 10-time irradiation(the 30th day), and at 60 days and at 120 days after irradiation,the expression levels of TGF-βin lung tissue were detected;In addition each rat lung tissue morphology was observed.Results The expression levels of TGF-βprotein in group B reached peak at the 30 days after irradiation,which at different time points in group A and group C was significantly lower than that in group B(P<0.01).Rats of group A had no significant change in lung tissue.Rats of group B were observed inflammatory cells in interstitial pulmonary alveolar,alveolar structural damaging,interstitial pulmonary edema,interstitial hemorrhage and inflammatory pulmonary with alveolar cavity;Rats of group C pulmonary interstitial fewer inflammatory cells in alveolar damage were not obvious, with no-pulmonary interstitial edema, hemorrhage and no inflammatory symptoms, comparison between group B and C was not obvious. Conclusion Extraction of radix isatidis could reduce the expression levels of transforming growth factor(TGF-β)in lung tissues of rats with radioactive lung injury ,has better preventive effect on radioactive lung injury,could protect lungtissue from damaging,inhibite alveolar permeability,and present the effect of pulmonary edema.