NewslettersImmune Regulation NewsMuscle Cell NewsPlatelet-Instructed SPP1+ Macrophages Drive Myofibroblast Activation in Fibrosis in a CXCL4-Dependent MannerBy Laurisa Dohm - February 24, 20230239Investigators discovered a population of profibrotic macrophages marked by expression of Spp1, Fn1, and Arg1 —termed Spp1 macrophages — which expanded after organ injury.[Cell Reports]Full ArticleGraphical Abstract