POSTN and malaria: Previously, we observed that antibodies against human periostin (OSF-2) could block the rosette-stimulating effect induced by the culture supernatant of human monocytic THP-1 cells primed with P. falciparum antigens (Lee et al., 2020), suggesting a role for OSF-2 in IRBC-mediated cytoadherence during malaria pathogenesis.