TY - JOUR ID - 19144 TI - Curcumin protects human umbilical vein endothelial cells against high oxidized low density lipoprotein-induced lipotoxicity and modulates autophagy JO - Iranian Journal of Basic Medical Sciences JA - IJBMS LA - en SN - 2008-3866 AU - Zhao, Lifeng AU - Luo, Ruixi AU - Yu, Honghong AU - Li, Shuaishuai AU - Yu, Qi AU - Wang, Wenjia AU - Cai, Kun AU - Xu, Tao AU - Chen, Rui AU - Tian, Weiyi AD - Department of Immunology and Microbiology, School of Basic Medical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, P.R. China AD - Department of Experimental Center, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, P.R. China AD - Department of Cardiovascular Medicine, Second Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang 550025, P.R. China AD - Department of Morphology Laboratory, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, P.R. China Y1 - 2021 PY - 2021 VL - 24 IS - 12 SP - 1734 EP - 1742 KW - Atherosclerosis KW - Autophagy KW - Curcumin KW - Endothelial cells KW - Lipid metabolism disorders DO - 10.22038/ijbms.2021.59969.13297 N2 - Objective(s): Endothelial dysfunction is a precursor of cardiovascular disease, and protecting endothelial cells from damage is a treatment strategy for atherosclerosis (AS). Curcumin, a natural polyphenolic compound, has been shown to protect endothelial cells from dysfunction. In the present study, we investigated whether curcumin could ameliorate high oxidized low-density lipoprotein (ox‐LDL)-induced endothelial lipotoxicity by inducing autophagy in human umbilical vein endothelial cells (HUVECs).Materials and Methods: HUVECs were treated with 50 μM high ox‐LDL alone or in combination with 5 μM curcumin for 24 hr. Cell viability and function were assessed by the cell counting kit-8 (CCK-8) assay, tube formation assay and cell migration experiments. Oil red O staining was used to detect lipid droplet accumulation in HUVECs. The change in reactive oxygen species (ROS) levels in HUVECs was measured with the probe DCFH-DA. Quantitative real-time PCR (qPCR) and Western blotting were used to evaluate the mRNA and protein levels of several inflammatory and autophagy-related factors.Results: Cell viability was restored, tube formation and migration ability were increased, and lipid accumulation, oxidative stress and inflammatory responses were decreased in the curcumin-treated group compared with the high ox‐LDL group. Furthermore, high ox‐LDL inhibited HUVEC autophagy, and this effect was reversed by curcumin. Moreover, curcumin regulated the expression of several key proteins involved in the AMPK/mTOR/p70S6K signaling pathway.Conclusion: Our findings suggest that curcumin is able to reduce endothelial lipotoxicity and modulate autophagy and that the AMPK/mTOR/p70S6K pathway might play a key role in these effects. UR - https://ijbms.mums.ac.ir/article_19144.html L1 - https://ijbms.mums.ac.ir/article_19144_b4456cbec9846a3ad8b96c0a38a59d6d.pdf ER -