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Radioprotective effects of vitamin A against gamma radiation in mouse bone marrow cells
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The data of radioprotective effects of vitamin A showed that administration of 100 mg/kg vitamin A to mice prior to 2 Gy of gamma radiation has reduced the micronucleus levels in PCE cells by a factor of 2.62.

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イメージ 1
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Administration of 100 mg/kg vitamin A, which is much smaller than LD50 of vitamin A (LD50 for intraperitoneal injection = 1510 ¡Þ 240 mg/kg) can protect mice.

¥Ó¥¿¥ß¥óA¤ÎLD 50¡ÊÊ¢¹ÐÆâÃí¼Í¤ÎLD 50 = 1510¡Þ240 mg / kg¡Ë¤è¤ê¤Ï¤ë¤«¤Ë¾®¤µ¤¤100 mg / kg¤Î¥Ó¥¿¥ß¥óA¤òÅêÍ¿¤Ç¡¢¥Þ¥¦¥¹¤òÊݸ¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£
Vitamin A reduces the harmful effects of ionizing radiation on DNA, due to the antioxidant activity and the trapping of free radicals produced by radiation, and diminish the genetic damage caused by radiation.

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Vitamin A has no effect on the proliferation and differentiation rate of bone marrow cells.

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Conclusion
Vitamin A reduces the harmful effects of ionizing radiation on DNA, due to the antioxidant activity and the trapping of free radicals produced by radiation, and diminish the genetic damage caused by radiation to the bone marrow.

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