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1篇 您的检索式:作者名="Catherine Menard"
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1B7-H7 (HHLA2) inhibits T-cell activation and proliferation in the presence of TCR and CD28 signaling显示文摘Modulation of T-cell responses has played a key role in treating cancers and autoimmune diseases.Therefore,understanding how different receptors on T cells impact functional outcomes is crucial.The influence of B7-H7(HHLA2)and CD28H(TMIGD2)on T-cell activation remains controversial.Here we examined global transcriptomic changes in human T cells induced by B7-H7.Stimulation through TCR with OKT3 and B7-H7 resulted in modest fold changes in the expression of select genes;however,these fold changes were significantly lower than those induced by OKT3 and B7-1 stimulation.The transcriptional changes induced by OKT3 and B7-H7 were insufficient to provide functional stimulation as measured by evaluating T-cell proliferation and cytokine production.Interestingly,B7-H7 was coinhibitory when simultaneously combined with TCR and CD28 stimulation.This inhibitory activity was comparable to that observed with PD-L1.Finally,in physiological assays using T cells and APCs,blockade of B7-H7 enhanced T-cell activation and proliferation,demonstrating that this ligand acts as a break signal.Our work defines that the transcriptomic changes induced by B7-H7 are insufficient to support full costimulation with TCR signaling and,instead,B7-H7 inhibits T-cell activation and proliferation in the presence of TCR and CD28 signaling.Sadiye Amcaoglu Rieder Jingya Wang Natalie White Ariful Qadri Catherine Menard Geoffrey Stephens Jodi LKarnell Christopher ERudd Roland Kolbeck 2021Cellular & Molecular Immunology2021,18,6:9
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