Fig. 6From: The adverse vascular effects of multi-walled carbon nanotubes (MWCNTs) to human vein endothelial cells (HUVECs) in vitro: role of length of MWCNTsThe release of inflammatory cytokines in human umbilical vein endothelial cells (HUVECs) after exposure to XFM22 (the shorter MWCNT) and XFM19 (the longer MWCNT). HUVECs were exposed to various concentrations of XFM22 and XFM19 for 24 h, and the release of TNFα (a) and IL-6 (b) was measured by ELISA to indicate inflammatory response. *p < 0.05, compared with control; #p < 0.05, comparison between XFM22 and XFM19 at the same concentration; ANOVABack to article page