TY - JOUR
T1 - Rat thyroid epithelial cells provide limited accessory function but fail to present allo antigens in vitro.
AU - Sigillito, R. J.
AU - Miller, S.
AU - Tokuda, N.
AU - Levy, R. B.
PY - 1989/9/1
Y1 - 1989/9/1
N2 - Human and mouse thyroid epithelial cells (TEC) have been reported to exhibit a number of immunological activities including partial, but not total, antigen presenting capability. In the studies described here, the thyroid stimulating hormone-dependent rat thyroid epithelial cell line FRTL-5 was tested for its abilities to provide accessory and antigen presenting cell (APC) activity. FRTL-5 cells alone were not able to function as accessory cells for ConA induced polyclonal proliferation of purified T-cells and were not capable of inducing alloreactive T-cell proliferation in mixed lymphocyte reaction (MLR) cultures. Furthermore, even following the induction and enhanced expression of MHC class II and class I MHC products, respectively by IFN-gamma, FRTL-5, cells could not function as accessory cells or induce alloreactive T-cell proliferation as the singular stimulatory population in MLR cultures. However, these epithelial cells could effectively synergize with either low numbers of spleen cells, or with supernatants from activated T-cells, to provide accessory function in ConA stimulated cultures. These findings suggest that hormone-dependent and functional rat TEC cannot directly activate resting syngeneic or unprimed allogeneic T-cells, although they can provide at least one accessory cell signal involved in T-cell activation by mitogen. Thus, the results presented here do not support contentions that such a nonhemopoietic resident cell population is capable of directly triggering the initial activation of anti-thyroid specific T-cells.
AB - Human and mouse thyroid epithelial cells (TEC) have been reported to exhibit a number of immunological activities including partial, but not total, antigen presenting capability. In the studies described here, the thyroid stimulating hormone-dependent rat thyroid epithelial cell line FRTL-5 was tested for its abilities to provide accessory and antigen presenting cell (APC) activity. FRTL-5 cells alone were not able to function as accessory cells for ConA induced polyclonal proliferation of purified T-cells and were not capable of inducing alloreactive T-cell proliferation in mixed lymphocyte reaction (MLR) cultures. Furthermore, even following the induction and enhanced expression of MHC class II and class I MHC products, respectively by IFN-gamma, FRTL-5, cells could not function as accessory cells or induce alloreactive T-cell proliferation as the singular stimulatory population in MLR cultures. However, these epithelial cells could effectively synergize with either low numbers of spleen cells, or with supernatants from activated T-cells, to provide accessory function in ConA stimulated cultures. These findings suggest that hormone-dependent and functional rat TEC cannot directly activate resting syngeneic or unprimed allogeneic T-cells, although they can provide at least one accessory cell signal involved in T-cell activation by mitogen. Thus, the results presented here do not support contentions that such a nonhemopoietic resident cell population is capable of directly triggering the initial activation of anti-thyroid specific T-cells.
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M3 - Article
C2 - 2518570
AN - SCOPUS:0024726557
VL - 2
SP - 275
EP - 284
JO - Regional immunology
JF - Regional immunology
SN - 0896-0623
IS - 5
ER -