Author/Authors :
Refahi، Soheila نويسنده Department of Medical Physics, Faculty of Medicine. Ardebil University of Medical Sciences, Ardebil, Iran. AND Departments of Physics and Medical Engineering, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Refahi, Soheila , Minaei، Bagher نويسنده Department of Traditional Medicine, School of Traditional Medicine, Tehran University of Medical Sciences, Tehran, IR Iran , , Haddadi، Gholam Hassan نويسنده Department of Medical Physics, Fasa University of Medical Sciences, Fasa, Iran , , KHOEI، SAMIDEH نويسنده , , Bakhtiarian، Azam نويسنده Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran , , Pourissa، Masoud نويسنده Department of Radiology, Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Pourissa, Masoud , Takavar، Abbas نويسنده Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Tehran University of Medical Sciences, Tehran ,
Abstract :
Radiotherapy of the thorax often causes lung inflammation leading to fibrosis. The aim of this study was to investigate whether the use of glycyrrhizic acid (GLA) could improve the development of lung fibrosis in irradiated animals. Wistar rats were divided into four groups. Group A rats received thoracic irradiation. Rats in group B received GLA and irradiation. Group C received GLA and no irradiation. Group D received no GLA and irradiation. GLA was administered at a dose of 4 mg/kg body weight using an intraperitoneal injection one hour before thoracic irradiation. Radiation therapy was delivered on a Cobalt-60 unit using a single fraction of 16 Gy. The animals were sacrificed at 32 weeks following thoracic irradiation. The lungs were dissected and blind histopathological evaluation was performed. Histopathologically, a decrease (statistically not significant) in the thickening of alveolar or bronchial wall, formation of fibrous bands, and superimposed collagen were noted in the animals in group B as compared to the animals in group A. In this experimental study, administration of GLA one hour before thoracic irradiation may be a protective agent against radiation-induced fibrosis in animals and this model could be used in future studies.
