It is to study the effects of retinoids (retinol, retinoic acid, retinyl acetate) of different concentrations in vitro on expression of high affinity IL 2 receptor, IL 1, IL 2 production of peripheral blood mononuclear cells (PBMC) from normal volunteers.

• 目的： 观察视黄醇、视黄酸、维生素A 醋酸酯三种类维生素A（类VA）在体外对正常人外周血单个核细胞（PBMC）中淋巴细胞白细胞介素2 受体（IL－2R）表达、白细胞介素2（IL－2）分泌及单核细胞分泌白细胞介素1（IL－1）的影响。