Abstract
As shown by previous studies, the sheep erythrocyte-binding T11 molecule is involved in T cell activation, as well as in mechanisms of specific allogeneic target cell lysis. In this study, we utilized two anti-T11 monoclonal antibodies (mAb) that inhibited the specific cytolytic activity of mixed lymphocyte culture (MLC)-activated T cells to analyze, at the clonal level, the involvement of T11 molecules in (a) antigen-specific vs. nonspecific mechanisms of target cell lysis, and (b) antigen-driven T cell proliferation and interleukin 2 (IL2) production vs. IL2-induced cell proliferation. In contrast to anti-T3 or anti-T8 mAb, antibodies to T11 molecules inhibited the cytolytic activity of MLC-derived allospecific clones in a uniform manner. In addition, anti-T11 antibodies inhibited the specific activity of cytotoxic T lymphocyte clones resistant to anti-T3 antibodies, even after antibody-induced modulation of T3 molecules (while anti-T3 mAb had no effect). Similarly, anti-T11 antibodies inhibited the alloantigen-induced proliferation and IL2 release of alloreactive clones independent of their T4+ or T8+ phenotype. The inhibitory activity of anti-T11 antibodies appears to be confined to antigen-specific T cell funtions since neither natural killer-like activity of cytotoxic T lymphocyte clones nor the IL2-induced clonal proliferation was affected. Thus, our results indicate that T11 molecules are functionally involved in antigen recognition by T cell regardless of their function and T4/T8 phenotype. The possible mechanisms of anti-T11 antibody-mediated inhibition are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 841-844 |
| Number of pages | 4 |
| Journal | European Journal of Immunology |
| Volume | 15 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1985 |
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ASJC Scopus subject areas
- Immunology
Cite this
Involvement of T11 molecules in antigen receptor-mediated T lymphocyte functions : Effect of anti-T11 monoclonal antibody on functional capabilities of alloreactive T cell clones. / Moretta, A.; Pantaleo, G.; Lopez-Botet, M.; Mingari, M. C.; Carrel, S.
In: European Journal of Immunology, Vol. 15, No. 8, 1985, p. 841-844.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Involvement of T11 molecules in antigen receptor-mediated T lymphocyte functions
T2 - Effect of anti-T11 monoclonal antibody on functional capabilities of alloreactive T cell clones
AU - Moretta, A.
AU - Pantaleo, G.
AU - Lopez-Botet, M.
AU - Mingari, M. C.
AU - Carrel, S.
PY - 1985
Y1 - 1985
N2 - As shown by previous studies, the sheep erythrocyte-binding T11 molecule is involved in T cell activation, as well as in mechanisms of specific allogeneic target cell lysis. In this study, we utilized two anti-T11 monoclonal antibodies (mAb) that inhibited the specific cytolytic activity of mixed lymphocyte culture (MLC)-activated T cells to analyze, at the clonal level, the involvement of T11 molecules in (a) antigen-specific vs. nonspecific mechanisms of target cell lysis, and (b) antigen-driven T cell proliferation and interleukin 2 (IL2) production vs. IL2-induced cell proliferation. In contrast to anti-T3 or anti-T8 mAb, antibodies to T11 molecules inhibited the cytolytic activity of MLC-derived allospecific clones in a uniform manner. In addition, anti-T11 antibodies inhibited the specific activity of cytotoxic T lymphocyte clones resistant to anti-T3 antibodies, even after antibody-induced modulation of T3 molecules (while anti-T3 mAb had no effect). Similarly, anti-T11 antibodies inhibited the alloantigen-induced proliferation and IL2 release of alloreactive clones independent of their T4+ or T8+ phenotype. The inhibitory activity of anti-T11 antibodies appears to be confined to antigen-specific T cell funtions since neither natural killer-like activity of cytotoxic T lymphocyte clones nor the IL2-induced clonal proliferation was affected. Thus, our results indicate that T11 molecules are functionally involved in antigen recognition by T cell regardless of their function and T4/T8 phenotype. The possible mechanisms of anti-T11 antibody-mediated inhibition are discussed.
AB - As shown by previous studies, the sheep erythrocyte-binding T11 molecule is involved in T cell activation, as well as in mechanisms of specific allogeneic target cell lysis. In this study, we utilized two anti-T11 monoclonal antibodies (mAb) that inhibited the specific cytolytic activity of mixed lymphocyte culture (MLC)-activated T cells to analyze, at the clonal level, the involvement of T11 molecules in (a) antigen-specific vs. nonspecific mechanisms of target cell lysis, and (b) antigen-driven T cell proliferation and interleukin 2 (IL2) production vs. IL2-induced cell proliferation. In contrast to anti-T3 or anti-T8 mAb, antibodies to T11 molecules inhibited the cytolytic activity of MLC-derived allospecific clones in a uniform manner. In addition, anti-T11 antibodies inhibited the specific activity of cytotoxic T lymphocyte clones resistant to anti-T3 antibodies, even after antibody-induced modulation of T3 molecules (while anti-T3 mAb had no effect). Similarly, anti-T11 antibodies inhibited the alloantigen-induced proliferation and IL2 release of alloreactive clones independent of their T4+ or T8+ phenotype. The inhibitory activity of anti-T11 antibodies appears to be confined to antigen-specific T cell funtions since neither natural killer-like activity of cytotoxic T lymphocyte clones nor the IL2-induced clonal proliferation was affected. Thus, our results indicate that T11 molecules are functionally involved in antigen recognition by T cell regardless of their function and T4/T8 phenotype. The possible mechanisms of anti-T11 antibody-mediated inhibition are discussed.
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U2 - 10.1002/eji.1830150819
DO - 10.1002/eji.1830150819
M3 - Article
VL - 15
SP - 841
EP - 844
JO - European Journal of Immunology
JF - European Journal of Immunology
SN - 0014-2980
IS - 8
ER -