Propofol protects against high glucose-induced endothelial adhesion molecules expression in human umbilical vein endothelial cells

• Main Authors: Zhu Minmin, Chen Jiawei, Jiang Hui, Miao Changhong
• Format: Article
• Language: English
• Published: BMC 2013-01-01
• Series: Cardiovascular Diabetology
• Subjects: Propofol; High glucose; Adhesion molecules; NF-κB; HUVECs
• Online Access: http://www.cardiab.com/content/12/1/13

<p>Abstract</p> <p>Background</p> <p>Hyperglycemia could induce oxidative stress, activate transcription factor nuclear factor kappa B (NF-κB), up-regulate expression of endothelial adhesion molecules, and lead to endothelial injury. Studies have indicated that propofol could attenuate oxidative stress and suppress NF-κB activation in some situations. In the present study, we examined whether and how propofol improved high glucose-induced up-regulation of endothelial adhesion molecules in human umbilical vein endothelial cells (HUVECs).</p> <p>Methods</p> <p>Protein expression of endothelial adhesion molecules, NF-κB, inhibitory subunit of NF-κBα (IκBα), protein kinase Cβ2 (PKCβ2), and phosphorylation of PKCβ2 (Ser⁶⁶⁰) were measured by Western blot. NF-κB activity was measured by electrophoretic mobility shift assay. PKC activity was measured with SignaTECT PKC assay system. Superoxide anion (O₂^.-) accumulation was measured with the reduction of ferricytochrome c assay. Human peripheral mononuclear cells were prepared with Histopaque-1077 solution.</p> <p>Results</p> <p>High glucose induced the expression of endothelial selectin (E-selectin), intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), and increased mononuclear-endothelial adhesion. High glucose induced O₂^.- accumulation, PKCβ2 phosphorylation and PKC activation. Further, high glucose decreased IκBα expression in cytoplasm, increased the translocation of NF-κB from cytoplasm to nuclear, and induced NF-κB activation. Importantly, we found these high glucose-mediated effects were attenuated by propofol pretreatment. Moreover, CGP53353, a selective PKCβ2 inhibitor, decreased high glucose-induced NF-κB activation, adhesion molecules expression, and mononuclear-endothelial adhesion.</p> <p>Conclusion</p> <p>Propofol, via decreasing O₂^.- accumulation, down-regulating PKCβ2 Ser⁶⁶⁰ phosphorylation and PKC as well as NF-κB activity, attenuated high glucose-induced endothelial adhesion molecules expression and mononuclear-endothelial adhesion.</p>