The Radioprotective Effects of Bu-Zhong-Yi-Qi-Tang: A Prescription of Traditional Chinese Medicine

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Abstract
We evaluated the effect of Bu-Zhong-Yi-Qi-Tang, a prescription of traditional Oriental medicine, and its major ingredients on protection of the intestine and hematopoietic organs against radiation damage in this study. The jejunal crypt survival, endogenous spleen colony formation, and apoptosis in jejunal crypt cells were investigated in mice irradiated with high and low doses of γ-rays. Bu-Zhong-Yi-Qi-Tang administration before irradiation protected the jejunal crypts (p < 0.0001), increased the formation of the endogenous spleen colony (p < 0.05) and reduced the frequency of radiation-induced apoptosis (p < 0.05). In experiments on the effects of the individual ingredient of Bu-Zhong-Yi-Qi-Tang, Rensan (Radix Ginseng), Danggui (Radix Angelicae gigantis), Shengma (Rhizoma Cimicifugae) and Chaihu (Radix Bupleuri) might have major radioprotective effects, and each might have different degrees of effect on these three endpoints. These results indicated that Bu-Zhong-Yi-Qi-Tang might be a better agent than any one of its ingredients to satisfy all three endpoints. Although the mechanisms of this inhibitory effect remain to be elucidated, these results indicated that Bu-Zhong-Yi-Qi-Tang might be a useful radioprotector, especially since it is a relatively non-toxic natural product. Further studies are needed to better characterize the protective nature of Bu-Zhong-Yi-Qi-Tang extract and its ingredients.

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