苦荞蛋白源肽AFYRW对脂多糖诱导的人脐静脉内皮细胞损伤的影响

目的：探讨苦荞蛋白源肽AFYRW在脂多糖（lipopolysaccharide,LPS）诱导的血管内皮细胞损伤中的作用。方法：采用LPS诱导人脐静脉内皮细胞（human umbilical vein endothelial cells,HUVECs）建立血管内皮细胞炎症损伤模型；采用CCK8试剂盒检测AFYRW对细胞增殖活力的影响；Western blot检测血管细胞黏附分子-1(vascular cell adhension molecule-1,VCAM-1)、细胞内黏附分子-1(intercellular adhension molecule-1,ICAM-1)、白细胞介素（interleukin,IL）-6、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、内皮型一氧化氮合酶（endothelial nitric oxide synthase,e NOS）、诱导型一氧化氮合酶（inducible nitricoxide synthase,iNOS）水平及核因子-κB(nuclear factor kappa-B,NF-κB)p65的磷酸化水平；酶法...

Ameliorative Effect of Peptide AFYRW Derived from Tartary Buckwheat Protein on Lipopolysaccharide-Induced Injury in Human Umbilical Vein Endothelial Cells

Objective: To investigate the ameliorative effect of peptide AFYRW derived from tartary buckwheat protein against LPS-induced vascular endothelial injury. Methods: Lipopolysaccharide (LPS) was used to induce vascular endothelial injury in human umbilical vein endothelial cells (HUVECs). The cell counting kit-8 (CCK8) assay was used to detect the effect of AFYRW on cell proliferation. Western blot was used to evaluate the protein expression of vascular cell adhesion molecule-1 (VCAM-1), intracellular adhesion molecule-1 (ICAM-1), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), endothelial nitric oxide synthase (eNOS), inducible nitric oxide synthase (iNOS), and phosphorylation of nuclear factor-κB (NF-κB) p65. An enzymatic assay was used to detect the changes in the content of nitric oxide (NO). Monocyte adhesion assay was used to detect the adhesiveness of HUVECs. Results: Peptide AFYRW significantly increased the survival activity of cells, decreased the relative protein expression of VCAM-1, ICAM-1, IL-6, TNF-α, and iNOS, reduced the content of NO, inhibited LPS-induced adhesion of human monocyte THP-1 cells to HUVECs and suppressed the activity of NF-κB. Conclusion: Peptide AFYRW can ameliorate LPS-induced inflammation in HUVECs, which may be related to the inhibition of NF-κB activity.