Fig. 6From: Immunoregulatory potential of mesenchymal stem cells following activation by macrophage-derived soluble factorsInvolvement of IL-6 and PGE2 in the regulation of macrophage cytokine secretion by primed MSC. TNF-α and IL-10 levels in media of MΦGM (a) or MΦM (b) cultured in isolation or co-cultured with MSC primed or not (−) with CMGM or CMM. Co-cultures were incubated in the absence or presence of neutralizing antibody (Ab) against IL-6 or PGE2. *p < 0.05Back to article page