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结果: 与阴性组相比, 单纯放疗组GST活性和MDA含量显著升高(479±17 vs 427±59, 50.3±1.0 vs 46.8±2.3, 33.7±8.8 vs 21.4±7.2, P <0.05, P <0.01, P <0.01), 抗氧化剂保护组GST活性和MDA较单纯放疗组显著降低(421±36 vs 479±17, 47.5±1.0 vs 50.3±1.0, 21.7±6.8 vs 33.7±8.8, P <0.05, P <0.01, P <0.01). 单纯放疗组T-SOD、Mn-SOD活性和GSH含量以及TAC显著低于非照射组(39.3±7.0 vs 48.8±2.8, 18.7±6.2 vs 28.8±2.5, 0.44±0.13 vs 0.57±0.06, 20.7±5.3 vs 26.5±3.3, P <0.01, P <0.01, P <0.01, P <0.05), 而抗氧化剂保护组T-SOD、Mn-SOD活性和GSH含量以及TAC显著高于单纯放疗组(47.7±4.3 vs 39.3±7.0, 28.2±7.7 vs 18.7±6.2, 0.61±0.22 vs 0.44±0.13, 26.3±1.7 vs 20.7±5.3, P <0.01, P <0.01, P <0.01, P <0.05).单纯放疗组NO含量和NOS活性显著高于对照组(1.22±0.08 vs 0.98±0.15, 4.92±0.94 vs 3.63±0.77, P <0.01, P <0.05), 抗氧化剂保护组NO含量和NOS活性及表达显著低于单纯放疗组(0.77±0.22 vs 1.22±0.08, 3.62±0.49 vs 4.92±0.94, P <0.01, P <0.05).
Xu-Jun Qin, Chun-Xu Hai, Wei He, Xin Liang, Xiao-Di Zhang, Kang-Tao Zhao, Hong-Li Chen, Rui Liu, Department of Toxicology, Faculty of Preventive Medicine, the Fourth Military Medical University, Xi'an 710032, Shannxi Province, China
Correspondence to: Chun-Xu Hai, Department of Toxicology, Faculty of Preventive Medicine, the Fourth Military Medical University, 169 Changle West Road, Xi'an 710032, Shannxi Province, China. cx-hai@fmmu.edu.cn
Received: November 22, 2003 Revised: January 9, 2004 Accepted: January 15, 2004 Published online: September 15, 2004
AIM: To observe the oxidative injury of livers induced by local irradiation and the protection of antioxidants compound of Chinese drug in rats with tumor.
METHODS: The Spraue-Dawley (SD) rats were divided into negative control group and trial groups. The tumor cells (Walker-256) were injected into the rat to get the solid tumor, which was then cut into small pieces to be embedded into the right rear buttocks under skin of rats. As the embedded tumor grew up successfully, the rats with solid tumor were randomly divided into 3 groups, i.e. tumor group, irradiative group and protective group. The protective group was given antioxidants compound by gavage and other groups were given the same dosage water. The irradiative group and the protective group were locally g-irradiated with the total doses of 47Gy, then all the rats were killed, the serum and livers were collected to measure the content of malondialdehyde (MDA), the activities of glutathione S-transferase (GST), total superoxide dismutase (T-SOD), manganese superoxide dismutase (Mn-SOD), the total antioxidant capacity (TAC), nitric oxide (NO), nitric oxide synthase (NOS) and the total proteins.
RESULTS: The activities of serum and liver GST (mkat/L and mkat/g) and the content of MDA (in liver protein, nmoL/g) in irradiative group were much higher than those in all the other groups (479±17 vs 427±59 and 421±36, 50.3±1.0 vs 46.8±2.3 and 47.5 ±1.0, 33.7±8.8 vs 21.4±7.2 and 21.7±6.8, P <0.05, P <0.01, P <0.01,respectively). The activities of T-SOD (in liver protein, mkat/g), Mn-SOD (in liver protein, mkat/g), GSH (in liver protein, mg/g) and TAC (in liver protein, mkat/g) in irradiative group were much lower than those in other groups (39.3±7.0 vs 48.8±2.8 and 47.7±4.3, 18.7 ±6.2 vs 28.8 ±2.5 and 28.2±7.7, 0.44±0.13 vs 0.57±0.06 and 0.61±0.22, 20.7± 5.3 vs 26.5 ±3.3 and 26.3±1.7, P <0.01, P <0.01, P <0.01, P <0.05, respectively).The content of NO (in liver protein, mmoL/g) in irradiative group increased significantly, the activity (in liver protein, mkat/g) of NOS also increased significantly than those in the control group (1.22 ±0.08 vs 0.98± 0.15, 4.92 ±0.94 vs 3.63± 0.77, P <0.01, P <0.05, respectively). The content of NO and the activity of NOS in protective group decreased markedly than those in irradiative group(0.77±0.22 vs 1.22 ±0.08, 3.62 ±0.49 vs 4.92±0.94, P <0.01, P <0.05, respectively).
CONCLUSION: Local irradiation can cause the oxidative injury on liver of the rats and the antioxidant compound shows good protective effect against this injury by increasing the activities of antioxidants and decreasing the content of NO, the activity and expression of NOS, which give us a new way to reduce the side effect during the radiotherapy.
Key Words: N/A
Citation: Qin XJ, Hai CX, He W, Liang X, Zhang XD, Zhao KT, Chen HL, Liu R. Protection of antioxidants compound of Chinese drug on liver oxidative injury by local 60Co irradiation in rats with tumor. Shijie Huaren Xiaohua Zazhi 2004; 12(9): 2135-2139
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