CXCL12 and rheumatoid arthritis: Nam et al. [112] reported that peritoneal lavage cells from mice treated with MSCs expressed higher levels of stromal cell-derived factor 1-alpha (SDF-1α or CXCL12) and RANTES than controls, again consistent with a possible therapeutic utility for RA as MSC migration was enhanced in the presence of SDF-1α and/or RANTES.