title: Inhibition of Hydrogen Peroxide-Induced Human Umbilical Vein Endothelial Cells Aging by Allicin Depends on Sirtuin1 Activation.
abstract: BACKGROUND The abnormal activity of Sirtuin 1 (Sirt1) is closely related to the aging of vascular endothelial cells. As a bioactive molecule, allicin has antioxidant, anti-inflammatory, and lipid-regulating mechanisms. However, few reports about the relationship of allicin and Sirt1 have been published. In this study, we aimed to elucidate the effect of allicin on Human Umbilical Vein Endothelial Cells (HUVECs) aging induced by hydrogen peroxide (H2O2) and the role of Sirt1 in this phenomenon. MATERIAL AND METHODS HUVEC were exposed to H2O2 to establish the aging model. The expression of protein and RNA were detected by Western blot and Reverse transcription-quantitative polymerase chain reaction. The 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to assess cell viability. Sirt1 enzyme activity assay was used to analyze enzymatic activity. Reactive oxygen species was detected by dichloroﬂuorescein diacetate (DCFH-DA). Cell aging was detected by Senescence β-Galactosidase (SA-β-gal) staining. RESULTS Results of this study revealed that pretreating HUVECs with 5 ng/mL allicin before exposure to H2O2 resulted in increased cell viability and reduced reactive oxygen species generation. Western blot and quantitative real-time polymerase chain reaction (qRT-PCR) analysis showed that H2O2 attenuated the phosphorylation and activation of Sirt1 and increased the expression of plasminogen activator inhibitor-1(PAI-1) protein. Moreover, H2O2 also promoted HUVEC aging. These effects were significantly alleviated by 5 ng/mL allicin co-treatment. Furthermore, the anti-aging effects of allicin were abolished by the Sirt1 inhibitor nicotinamide (NAM). CONCLUSIONS Overall, the results demonstrated that allicin protects HUVECs from H2O2-induced oxidative stress and aging via the activation of Sirt1.
authors.affiliation: Department of Pathology, Afﬁliated Hui Zhou hospital (The Third People's Hospital of Huizhou), Guangzhou Medical University, Huizhou, Guangdong, China (mainland).
authors.forename: Xiao-Long
authors.initials: XL
authors.lastname: Lin
authors.affiliation: Medical Department of Neurology, The Sixth People's Hospital of Huizhou (The People's Hospital of Huiyang), Huizhou, Guangdong, China (mainland).
authors.forename: Yuanbo
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Clinical Laboratory, Affiliated Nanhua Hospital, University of South China, Hengyang, Hunan, China (mainland).
authors.forename: Mihua
authors.initials: M
authors.lastname: Liu
authors.affiliation: Department of Pathology, Afﬁliated Hui Zhou hospital (The Third People's Hospital of Huizhou), Guangzhou Medical University, Huizhou, Guangdong, China (mainland).
authors.forename: HuiJun
authors.initials: H
authors.lastname: Hu
authors.affiliation: Department of Pathology, Afﬁliated Hui Zhou hospital (The Third People's Hospital of Huizhou), Guangzhou Medical University, Huizhou, Guangdong, China (mainland).
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Department of Pathology, Afﬁliated Hui Zhou hospital (The Third People's Hospital of Huizhou), Guangzhou Medical University, Huizhou, Guangdong, China (mainland).
authors.forename: Xiao-Juan
authors.initials: XJ
authors.lastname: Fan
authors.affiliation: Department of Pathology, Afﬁliated Hui Zhou hospital (The Third People's Hospital of Huizhou), Guangzhou Medical University, Huizhou, Guangdong, China (mainland).
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Hu
authors.affiliation: Department of Pathology, Afﬁliated Hui Zhou hospital (The Third People's Hospital of Huizhou), Guangzhou Medical University, Huizhou, Guangdong, China (mainland).
authors.forename: Wei-Wen
authors.initials: WW
authors.lastname: Zou
mesh_terms: D000975:Antioxidants / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D016922:Cellular Senescence / Q000187:drug effects*; D004220:Disulfides; D004347:Drug Interactions; D042783:Endothelial Cells; D061307:Human Umbilical Vein Endothelial Cells / Q000166:cytology / Q000187:drug effects*; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology; D009536:Niacinamide / Q000494:pharmacology; D009569:Nitric Oxide / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects; D010766:Phosphorylation; D020011:Protective Agents / Q000494:pharmacology; D017382:Reactive Oxygen Species / Q000378:metabolism; D056564:Sirtuin 1 / Q000494:pharmacology*; D013441:Sulfinic Acids / Q000494:pharmacology*; D001616:beta-Galactosidase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D004220:Disulfides; D020011:Protective Agents; D017382:Reactive Oxygen Species; D013441:Sulfinic Acids; D009536:Niacinamide; D009569:Nitric Oxide; C006452:allicin; D006861:Hydrogen Peroxide; D001616:beta-Galactosidase; D056564:Sirtuin 1