• 대한방사선기술학회지:방사선기술과학
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• 제23권1호
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• pp.81-89
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• 2000

In the present study, to determine whether the ascorbate protect against radiation damage and the possible relationship among the radioprotective effects and antioxidant actions, the effects of ascorbate(240 mg/kg, i.p) pretreatment of mice on the survival ratio, splenic weight, major antioxidant enzymes(SOD, catalase and glutathione peroxidase) activities, glutathione contents and lipid peroxidation in the liver were examined for 2 weeks after whole-body ${\gamma}-irradiation$(6.5 Gy). The 30-day survival ratio Increased from 10% to 47% for mice treated with ascorbate. The ascorbate decreased the extent of loss in splenic weight and stimulated recovery of splenic weight in irradiated mice(p<0.01). On the day of 14 after ${\gamma-irradiation}$, the ascorbate pretreatment produced a slight increase of antioxidant enzymes activities and significantly increased reduced glutathione(GSH) contents(P<0.05) in the liver compared with non-treated group. Pretreatment with the ascorbate significantly decreased GSSG/total GSH ratio(p<0.05) without the change of GSSG in the liver and inhibited the radiation-induced increase in the hepatic malondialdehyde levels(p<0.05). In these results, we found that its radioprotective effect by protecting antioxidant enzyme activities and glutathione contents from radiation induced a decrease, and thereby suppressing lipid peroxidation which is induced by free radicals.

• 혜화의학회지
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• 제8권1호
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• pp.403-424
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• 1999

To evaluate the antitumor activity, antimetastatic and radioprotective effects of Kamisasammaekmundongtang(KSMT), studies were done experimentally. The results were obtained as follows: 1. In cytotoxicity against P388, A549 and B16-F10, KSMT was not showed satisfiable cytotoxicity as compared with control. 2. In Inhibitory effect on activity of DNA topoisomerase I, KSMT has strong inhibitory effect. 3. The inhibitory effect on adhesion of A549 to complex extracellular matrix was significantly increased at 0.5mg/ml, 1mg/ml of KSMT. 4. The T/C% was 122 in KSMT treated group in S-180 bearing ICR mice. 5. In antiangiogenetic effect on CAM assay, inhibitory rate was 33% in KSMT treated group. 6. In pulmonary colonization assay, a number of colonies in the lungs were decreased significantly in KSMT treated group as compared with control group. 7. By FACS analysis of splenic leukocyte after exposure to radiation by linear accelerator, T-helper cell, B cell and macrophage in KSMT treated group were significantly increased while splenocytes were decreased in control group. 8. In histological changes of jejunum of $Bald{\setminus}C$ mice after exposure to radiation by linear accelerator, exclusion and fusion of villi were decreased as compared with control group. But in duodenum and ileum, exclusion and fusion of villi were not decreased as compared with control group. 9. WBC, PLT were increased in KSMT treated group as compared with control group after exposure to radiation by linear accelerator, but the increasing effect was not significant. Above results suggest that KSMT may be useful in prevention of cancer metastasis and protection from damage by radiotherapy. But the further study of KSMT would be demanded.

• 대한한방종양학회지
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• 제6권1호
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• pp.1-18
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• 2000

The present study was performed in order to evaluate the effects of the gamihyangsayukgunjatang on radioprotection and apoptosis in small intestines of mice after whole body irradiation. Two hundred forty mice were divided into 40 groups according to the radiation dose and the gamihyangsayukgunjatang treatment. The extracts of the herbal medicines were orally administered to each group differently before and/or after irradiation. The gamihyangsayukgunjatang treated groups were divided into 3 groups. Sample Ⅰ was the group treated with the gamihyangsayukgunjatang for 3 days before the radiation, sample Ⅱ was the group treated with the gamihyangsayukgunjatang for 3 days after the radiation. Sample Ⅲ was the group treated with the gamihyangsayukgunjatang for both 3 days before and after the radiation. To analyze the crypt survival, the micradony survival assay was used according to the Withers and Elind's method. To analyze the apptosis, the TUNEL assay was done. The results obtained are a follows : 1. From the microcolony survival assay, the gamihyangsayukgunjatang treated groups showed the radioprotective effect with a statistical significance(p<0.05), as compared to the control group. Comparing the radioprotective effect among the 3 groups, sample III was statistically more significant than sample I and II (p<0.05). Sample I showed no effect. In accordance with the research mentioned above, it is suggested that the radioprotective effect of the gamihyangsayukgunjatang is more useful for the treatment of the radiation injury rather that the prevention. 2. The results of the TUNEL assay showed that the apoptotic index in the gamihyangsayukgunjatang treated group was slightly decreased with no effectiveness, as compared to the control group. According to the above results, it could be suggested that the gamihyangsayukgujatang has a prominent protective effect in mice intestines against the radiation damage. However, the radioprotective effect does not seem to be related to inhibition of the apoptosis.

• 환경생물
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• 제31권4호
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• pp.376-382
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• 2013

[6]-Gingerol, a major polyphenol of ginger (Zingiber officinale), exhibits a variety of biological properties including anti-oxidant, anti-inflammatory and anti-cancer activity. However, the radioprotective effect of [6]-gingerol is still unknown. The aim of this study was to investigate the radioprotective effect of [6]-gingerol against radiation-induced cell cytotoxicity and oxidative stress in HepG2 cells. [6]-Gingerol pretreatment attenuated radiation-induced cell cytotoxicity caused by 5Gy (half lethal dose, $LD_{50}$ of HepG2 cells). The measurements of superoxide dismutase (SOD) and catalase (CAT) activity were also performed. The results showed that [6]-gingerol pretreatment reduced increasing SOD and CAT activity after exposure of IR, indicating that [6]-gingerol protected oxidative stress by regulating cellular antioxidant enzyme (SOD and CAT) activity. These findings suggest that [6]-gingerol acts as a radioprotector by attenuating cell cytotoxicity and oxidative stress.

• Journal of Ginseng Research
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• 제20권2호
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• pp.149-153
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• 1996

Studies were Performed to determine whether the water fraction of Panax ginseng Protected radiation damage to hair medullar cells of N:GP(s) mice after in vivo irradiation with $^{60}Co{\;}{\gamma}-rays$. The hair follicles in the middle of the growth cycle were analysed 3 days after 3 Gy irradiation for the changes in the number of cells in the forming medulla of the hair in the region just above the germinal matrix of the growing (anagen) hair follicle. The radioprotective effect of ginseng was compared with the irradiation control. The medullar cell count per unit length ($100{\;}\mu\textrm{m}$) of hair follicle was higher in the pretreated-groups of ginseng, both oral (2 mg/ml of drinking water, p<0.05) and intraperitoneal (0.3 mg/head, p<0.001) treatments, than the irradiation control. These data suggested that the water fraction of Panax ginseng may reduce cell damages on the body surface caused by ${\gamma}-rays$.

• 한국환경생물학회:학술대회논문집
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• 한국환경생물학회 2004년도 학술대회
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• pp.119-120
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• 2004

• 대한약학회:학술대회논문집
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• 대한약학회 2000년도 NEW STRATEGY FOR DRUG DEVELOPMENT IN POST-GENOMIC ERA(대한약학회)
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• pp.153-153
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• 2000

• 한국식품영양과학회지
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• 제29권1호
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• pp.93-98
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• 2000

We performed this study to determine the radioprotective effects of Shi-Quan-Dai-Bu-Tang, as a prescription of traditional Oriental medicine, and its major ingredients. The jejunal crypt survival, endogenous spleen colony formation, and apoptosis in jejunal crypt cells were investigated in mice irradiated with high and low dose of ${\gamma}$-rays. The administration of danggui, baishaoyao, rensan, gancao or baifuling before irradiation protected the jejunal crypts (p<0.005). Shoudehuang, danggui, baishaoyao, rensan and huangqui increased the formation of endogenous spleen colony (p<0.05). Chuanxiong, baishaoyao, rensan and baifuling reduced the frequency of radiation-induced apotosis (p<0.05). The results indicated that the extracts of danggui, baishaoyao, rensan and baifuling may have radoprotective effects in mice irradiated with high and low dose of ${\gamma}$-rays. The radioprotective effect of the prescription, Shi-Qaun-Da-Bu-Tang, was not significant.

• KSBB Journal
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• 제30권1호
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• pp.11-20
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• 2015

Radiation causes various pathophysiological alterations in living animals, and it causes death at high doses by multiple mechanisms, including direct DNA damage and indirect oxidative stress. The search for useful radioprotectors has been an important issue in the field of radiation biology. Ideal radioprotectors should have low toxicity and an extended window of protection. As many synthetic compounds have toxic side effects, the natural products have attracted scientific attention as radioprotectors. Natural products that have been recently shown to be effective with various biological activities were found to have radioprotective effect. The aim of this review is to summary the recent research of the radioprotective effects of natural foods, especially focused on the glycobiological properties of mushrooms.

• 대한방사선기술학회지:방사선기술과학
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• 제24권1호
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• pp.75-82
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• 2001

Effect of single pre-administration of Cordyceps militaris(Cm) extract on the survival ratio, body weight and organ weight changes and blood cell counts after whole-body ${\gamma}-irradiation$ were investigated. The single pre-administration of Cm extract at 24 hrs before ${\gamma}-irradiation$ increased the 40-day survival ratio of irradiated mice from 60.1% to 71.4%. The administration of Cm extract completely prevented weight reductions of spleen and thymus produced by ${\gamma}-irradiation$ (P<0.01, P<0.05). Similar but somewhat less radioprotective effect was also found In the testis of the Cm treated mice. The administration of Cm extract retarded the reduction of both leukocyte and lymphocyte counts occured during the first 7 days and accelerated the recovery of the counts thereafter. The exrtract also acclerated the recovery of the erythrocyte counts occured after the day 21th. SDS-polyacrylamide gel electrophoresis of the soluble proteins extracted from various organs did not reveal differences to any extent in all groups except in the livers of the irradiated and extract treated groups, in which some proteins were missing or less present. Also, the result of general intra and extra mycelial enzyme assays with Cm, extramycelial enzyme activity was relatively higher than the intramycelial enzyme, Cm appeared to indicate that ${\alpha}-amylase$ was the highest among the enzymes and gluosidase and chitinase were followed. Since the spleen, thymus and testis have been well known as radiosensitive organs, the protective action of Cm extract on irradiated mice may be responsible for its enhancing recovery of these organs. Although the exact mechanism in protective effect of Cm extract on irradiated mice is not clear yet, the present study is the first report regarding the Cm which was tested and found to be a potential radioprotective agent.