Furthermore, increased levels of miR-20a-5p were detected in MDA-MB-231-derived exosomes, capable of modulating the tumor microenvironment by targeting SRC kinase signaling inhibitor 1 (SRCIN1) in murine bone marrow macrophages (BMMs), and thus promoting their proliferation and osteoclastogenesis [37]. The gene discussed is SRCIN1; the disease is neoplasm.