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近年来,维生素A的抗癌作用使人们很感兴趣,因为人类90％以上的上皮肿瘤恶性度很高,而它却影响着上皮组织的分化。大量研究表明,癌症患者血清中维生素A和胡箩卜素含量较低。但是,最新的研究没有证实血清维生素A、维生素A结合蛋白(RBP)及类胡萝卜素总量与肿瘤的继发有关。这可能是:血清维生素A和胡萝卜素含量降低是恶性肿瘤存在的后果。我们的试验观察了非上皮性肿瘤患者是否也发生类似差异,并测定了血清中维生素A运输蛋白质的水平,以弄清血清维生素A含量降低是否由于食物中维生素A不足而引起。
In recent years, the anti-cancer effect of vitamin A has attracted people’s interest because more than 90% of human epithelial tumors are highly malignant, and it affects the differentiation of epithelial tissues. A large number of studies have shown that the serum levels of vitamin A and plasmin in cancer patients are low. However, recent studies have not confirmed that the total amount of serum vitamin A, vitamin A binding protein (RBP) and carotenoids is related to the secondary tumor. This may be: The decrease in serum vitamin A and carotene levels is a consequence of the presence of malignancy. Our trial looked at whether similar differences in patients with non-epithelial neoplasia also occurred and measured the level of vitamin A transport protein in the serum to see if the decrease in serum vitamin A levels was due to insufficient vitamin A in the diet.