The researchers found that dendritic cells can conert itamin D3 -- generated under the skin by sunlight -- into its actie hormonal form, and induce T cells to migrate to the skin.

• 研究者们发现树枝状细胞可以将维生素D3--由在光照下皮肤产生---转变成它的活性激素形式，并且诱发T细胞向皮肤移动。