SMARCA4 and rhabdoid tumor: For example, exosomes from atypical teratoid/rhabdoid tumor-associated MSCs after conversion to an aberrant phenotype contained high levels of miR-155, which could cause inhibition of the tumor suppressor gene SMARCA4 as a direct target of miR-155 associated with enhanced migratory capability of atypical teratoid/rhabdoid tumors.