Good article about controlling overall T cell resp

Good article about controlling overall T cell response via CD8 protein. You can't help but wonder if just turning up and turning down T cell response, without immune regulation in other areas, might have collateral damage on healthy cells, as well.

CCR5 blockade regulates T cell response, and CD8, via CD4. I found an old (2011) paper, that does a good job explaining how CCR5 blockade controls anti tumor response via T cell, and CD4/CD8 control:

"Immune responses against cancer rely upon leukocyte trafficking patterns that are coordinated by chemokines. CCR5, the receptor for chemotactic chemokines MIP1alpha, MIP1beta, and RANTES (CCL3, CCL4, CCL5), exerts major regulatory effects on CD4+- and CD8+ T cell-mediated immunity. Although CCR5 and its ligands participate in the response to various pathogens, its relevance to tumoral immune control has been debated. Here, we report that CCR5 has a specific, ligand-dependent role in optimizing antitumor responses. In adoptive transfer studies, efficient tumor rejection required CCR5 expression by both CD4+ and CD8+ T cells. CCR5 activation in CD4+ cells resulted in CD40L upregulation, leading to full maturation of antigen-presenting cells and enhanced CD8+ T-cell crosspriming and tumor infiltration. CCR5 reduced chemical-induced fibrosarcoma incidence and growth, but did not affect the onset or progression of spontaneous breast cancers in tolerogenic Tg(MMTV-neu) mice. However, CCR5 was required for TLR9-mediated reactivation of antineu responses in these mice. Our results indicate that CCR5 boosts T-cell responses to tumors by modulating helper-dependent CD8+ T-cell activation. Cancer Res; 71(16);"

https://aacrjournals.org/cancerres/article/71...onses-Rely