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- W3115673954 abstract "Immune checkpoint molecules are receptors that can transmit inhibitory signals into cells to negatively modulate the immune response. However, their roles in NK cells during normal pregnancy remain poorly understood.Peripheral blood samples were collected from women during the first, second and third trimesters of pregnancy. Peripheral blood NK (pNK) cells and T cells were analyzed for the expression of the immune checkpoint molecules TIGIT and PD-1 by flow cytometry. In addition, the ability of pNK cells to secret functional molecules was also evaluated.The expression of TIGIT on pNK cells increased gradually throughout pregnancy, whereas that of PD-1 showed the opposite pattern. However, on T cells, the expression of both TIGIT and PD-1 peaked during early pregnancy, and then declined gradually thereafter. Moreover, the expressions of granzyme B, IFN-γ and CD107a by pNK cells also decreased over the course of pregnancy. Compared with TIGIT- NK cells, TIGIT + NK cells possessed reduced expression of functional molecules.As pregnancy progressed, the levels of immune checkpoint molecules expressed on pNK cells and T cells changed and the two molecules showed different trends. Furthermore, the secretion of functional molecules from pNK cells was negatively correlated with the trend of TIGIT expression, indicating TIGIT may play an important role in modulating the functions of pNK cells during pregnancy. Further study of TIGIT expression on pNK cells may enhance our understanding of its role in maintaining maternal-fetal tolerance and provide a useful marker for predicting instability during pregnancy." @default.
- W3115673954 created "2021-01-05" @default.
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- W3115673954 date "2021-02-01" @default.
- W3115673954 modified "2023-09-27" @default.
- W3115673954 title "Dynamics of TIGIT and PD-1 expression on NK cells during the course of normal pregnancy" @default.
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- W3115673954 doi "https://doi.org/10.1016/j.imlet.2020.12.005" @default.
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