Abstract
NKT cells (nature killer T cells), as a regulatory cellular compartment in the immune system, express cell surface markers of T cells and NK cells. It secretes a variety of cytokines that stimulate specific antigens. Through regulating the balance of Th1/Th2, the NKT cells play an important role in prevention and treatment of graft-versus-host disease (GVHD). Its antitumor and anti-infectious effects serve as a basis of its application in allogeneic hematopoietic stem cell transplantation. A better understanding of the biological and immunological features of NKT cell, as well as its specific immune regulatory mechanisms, will further justify the rationales of using NKT cells in the management of GVHD for patients. In this review, the biologic properties, classification, differentiation and development, immune activation of NKT cells as well as the NKT cells and GVHD including the related mechanisms of prevention and treatment of GVHD with NKT cells, NKT cells and tumors, NKT cells and infection, and NKT cells and clinical GVHD are summarized.
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