活性维生素D₃〔1,25(OH)2VitD₃〕对钙磷代谢有重要的调节作用。近年来，大量体外实验和临床研究发现，活性维生素D₃有重要的抗炎和免疫调节作用。本文就活性维生素D₃对免疫系统和免疫相关疾病的调节作用作一系统性总结。

The active vitamin D₃ (1,25-dihydroxyvitamin D₃) is a key regulator for calcium and phosphorus homeostasis. In recent years, a large number of experiments in vitro and
in vivo as well as clinical evidences have showed that the active vitamin D₃ has important antiinflammatory and immunomodulatory effects. This review summarizes the regulatory effects of active vitamin D₃ on immune system and immune- related diseases.