PDGFRB and arteriovenous malformations of the brain: Similarly, thalidomide was reported to promote PDGF-B/PDGFR-β signaling, increase pericyte coverage, and reduce bleeding in a mouse model of brain arteriovenous malformation (bAVM; Zhu et al., 2018), a cerebrovascular disease with marked pericyte loss in humans (Winkler et al., 2018).