scholarly journals Poplar bark lipids enhance mouse immunity by inducing T cell proliferation and differentiation

2020 ◽  
Vol 82 (8) ◽  
pp. 1187-1196
Author(s):  
Jinxiu TANG ◽  
Xiuli WEI ◽  
Youzhi LI ◽  
Linlin JIANG ◽  
Tao FENG ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
T Cell ◽  
T Cell Proliferation ◽  
Cell Proliferation And Differentiation ◽  
Proliferation And Differentiation

scholarly journals Costimulation by B7 Modulates Specificity of Cytotoxic T Lymphocytes: A Missing Link That Explains Some Bystander T Cell Activation

1997 ◽  
Vol 186 (10) ◽  
pp. 1787-1791 ◽  
Author(s):  
Pan Zheng ◽  
Yang Liu
Keyword(s):  
Cell Proliferation ◽  
T Cells ◽  
Influenza Virus ◽  
T Cell ◽  
T Cell Activation ◽  
Cell Activation ◽  
T Cell Proliferation ◽  
Target Cells ◽  
Cell Proliferation And Differentiation ◽  
Proliferation And Differentiation

It has been proposed that some bystander T cell activation may in fact be due to T cell antigen receptor (TCR) cross-reactivity that is too low to be detected by the effector cytotoxic T lymphocyte (CTL). However, this hypothesis is not supported by direct evidence since no TCR ligand is known to induce T cell proliferation and differentiation without being recognized by the effector CTL. Here we report that transgenic T cells expressing a T cell receptor to influenza virus A/NT/68 nucleoprotein (NP) 366-374:Db complexes clonally expand and become effector CTLs in response to homologous peptides from either A/PR8/34 (H1N1), A/AA/60 (H2N2), or A/NT/68 (H3N2). However, the effector T cells induced by each of the three peptides kill target cells pulsed with NP peptides from the H3N2 and H2N2 viruses, but not from the H1N1 virus. Thus, NP366–374 from influenza virus H1N1 is the first TCR ligand that can induce T cell proliferation and differentiation without being recognized by CTLs. Since induction of T cell proliferation was mediated by antigen-presenting cells that express costimulatory molecules such as B7, we investigated if cytolysis of H1N1 NP peptide–pulsed targets can be restored by expressing B7-1 on the target cells. Our results revealed that this is the case. These data demonstrated that costimulatory molecule B7 modulates antigen specificity of CTLs, and provides a missing link that explains some of the bystander T cell activation.

T-Cell Proliferation and Differentiation

2019 ◽  
pp. 171-176
Author(s):  
N. Avrion Mitchison ◽  
Arno Müllbacher ◽  
Klaus Eichmann
Keyword(s):  
Cell Proliferation ◽  
T Cell ◽  
T Cell Proliferation ◽  
Cell Proliferation And Differentiation ◽  
Proliferation And Differentiation
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