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粘膜免疫系统是机体免疫系统的重要部分，近年发现了多种参与粘膜免疫应答和粘膜淋巴细胞归巢的新细胞和分子。本文介绍了这些细胞和分子的特性以及在粘膜免疫中的作用。
Mucosal immune system is an important part of the body’s immune system, in recent years found a variety of new cells and molecules involved in mucosal immune response and mucosal lymphocyte homing. This article describes the properties of these cells and molecules as well as their role in mucosal immunity.