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KMID : 0620920230550091895
Experimental & Molecular Medicine
2023 Volume.55 No. 9 p.1895 ~ p.1904
Double-edged sword: ¥ã¥ä T cells in mucosal homeostasis and disease
Kang In

Juan J. Cardona
Lee Heung-Kyu
Abstract
The mucosa is a tissue that covers numerous body surfaces, including the respiratory tract, digestive tract, eye, and urogenital tract. Mucosa is in direct contact with pathogens, and ¥ã¥ä T cells perform various roles in the tissue. ¥ã¥ä T cells efficiently defend the mucosa from various pathogens, such as viruses, bacteria, and fungi. In addition, ¥ã¥ä T cells are necessary for the maintenance of homeostasis because they select specific organisms in the microbiota and perform immunoregulatory functions. Furthermore, ¥ã¥ä T cells directly facilitate pregnancy by producing growth factors. However, ¥ã¥ä T cells can also play detrimental roles in mucosal health by amplifying inflammation, thereby worsening allergic responses. Moreover, these cells can act as major players in autoimmune diseases. Despite their robust roles in the mucosa, the application of ¥ã¥ä T cells in clinical practice is lacking because of factors such as gaps between mice and human cells, insufficient knowledge of the target of ¥ã¥ä T cells, and the small population of ¥ã¥ä T cells. However, ¥ã¥ä T cells may be attractive targets for clinical use due to their effector functions and low risk of inducing graft-versus-host disease. Therefore, robust research on ¥ã¥ä T cells is required to understand the crucial features of these cells and apply these knowledges to clinical practices.
KEYWORD
Innate immune cells, Innate immunity, Mucosal immunology
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