CCR5 doesn't downregulate GM-CSF? Also it should be said that leronlimab in HIV produces a far superior blockade compared to maraviroc.
GM-CSF affects a part of the equation in COVID-19. CCR5 blockade breaks down a myriad of feedback loops.
Maraviroc also protected against development of macroscopic and microscopic damage and colonic shortening and was as effective as prednisolone at preventing DSS-induced changes in colonic levels of IL-2, IL-4, IL-5, IL-6, IL-17 and GM-CSF