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作者观察了受到不同剂量Ｘ射线照射后ＢＡＬＢ／ｃ鼠毛髓细胞计数（ｔｈｅｍｅｄｕｌｌａｒｙｃｅｌｌｃｏｕｎｔｓ，ＭＣＣ）的变化，并研究了β－胡萝卜素（β－ｃａｒｏｔｅｎｅ，ＢＣ）对毛髓细胞的辐射防护作用。结果表明：１～５Ｇｙ照射后ＭＣＣ随剂量增加而降低，每Ｇｙ平均减少１５．８７％。２．５Ｇｙ照前３天以５０ｍｇ／ｋｇＢＣ每天１次灌胃能有效地保护毛囊增殖能力，维持ＭＣＣ近正常值。
The authors observed changes in the number of BALB / c mouse MCCs exposed to different doses of X-rays and studied the radioprotective effects of β-carotene (BC) on myeloid cells. The results showed that after 1 ~ 5 Gy irradiation, the MCC decreased with the increase of dose, with an average reduction of 15.87% per Gy. 2.5Gy according to the first 3 days to 50mg / kgBC once daily gavage can effectively protect the ability of hair follicles to maintain nearly normal MCC.