三、维生素A的治疗应用(一)维生素A生理生化研究的进展1.Vit.A前体在人体内转换成Vit.A的主要器官为小肠壁,转换反应机理尚未最后定论.Vit.A参与视紫质合成,增强视网膜感光性能,并与肾皮质激素的合成有关.视网膜中以Yit.A形式存在.Vit.及A_1或Vit.A酸调节上皮细胞增殖、发育以关系到生殖功能和胚胎发生.Vit.A_1醛和视觉障碍有关. Third, the treatment of vitamin A (A) the progress of vitamin A physiological and biochemical research 1.Vit.A precursor in the human body is converted to Vit.A main organ for the intestinal wall, the conversion reaction mechanism has not yet concluded .Vit.A involved Rhodopsin synthesis enhances retinal sensitization and is associated with the synthesis of renal cortical hormones Retina in the form of Yit.A.Vit. And A_1 or Vit.A acid regulates epithelial cell proliferation and development in relation to reproductive function and embryo Occurs. Vit.A_1 Aldehydes and vision disorders.