Deficiency of S100 calcium binding protein A9 attenuates vascular dysfunction in aged mice

作者全名："Zhao, Boying; Yu, Jiang; Luo, Yuan; Xie, Ming; Qu, Can; Shi, Qiong; Wang, Xiaowen; Zhao, Xingji; Kong, Lingwen; Zhao, Yu; Guo, Yongzheng"

作者地址："[Zhao, Boying; Zhao, Yu] Chongqing Med Univ, Affiliated Hosp 1, Vasc Surg Dept, Chongqing 400010, Peoples R China; [Zhao, Boying; Luo, Yuan; Xie, Ming; Zhao, Xingji; Kong, Lingwen] Chongqing Univ, Chongqing Univ Cent Hosp, Chongqing Emergency Med Ctr, Dept Cardiothorac Surg, Chongqing 400010, Peoples R China; [Yu, Jiang; Guo, Yongzheng] Chongqing Med Univ, Affiliated Hosp 1, Div Cardiol, Chongqing 400016, Peoples R China; [Qu, Can] Chongqing Med Univ, Affiliated Hosp 1, Dept Pharm, Chongqing 400016, Peoples R China; [Shi, Qiong] Chongqing Med Univ, Dept Lab Med, MOE Key Lab Lab Med Diagnost, Chongqing 400016, Peoples R China; [Wang, Xiaowen] Chongqing Med Univ, Affiliated Hosp 1, Dept Cardiothorac Surg, Chongqing 400016, Peoples R China; [Zhao, Xingji; Kong, Lingwen] Chongqing Key Lab Emergency Med, Chongqing 400010, Peoples R China"

通信作者："Zhao, Y (通讯作者)，Chongqing Med Univ, Affiliated Hosp 1, Vasc Surg Dept, Chongqing 400010, Peoples R China.; Guo, YZ (通讯作者)，Chongqing Med Univ, Affiliated Hosp 1, Div Cardiol, Chongqing 400016, Peoples R China."

来源：REDOX BIOLOGY

ESI学科分类：BIOLOGY & BIOCHEMISTRY

WOS号：WOS:001012861000001

JCR分区：Q1

影响因子：10.7

年份：2023

卷号：63

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：Aging; Vascular senescence; Oxidative stress; Insulin resistance

摘要："Background: S100 calcium-binding protein A9 (S100A9) is a danger-associated molecular pattern molecule that mediates the inflammatory response. Inflammation is essential in aging-related cardiovascular diseases. How-ever, less is known regarding the role of S100A9 in vascular aging. Methods: S100A9 null mice were used to investigate the role of S100A9 in aging-related pathologies. Artery rings were used to measure the functional characteristics of vascular with a pressurized myograph. Telomere length, Sirtuin activity, oxidative stress, and endothelial nitric oxide synthetase (eNOS) activity were used to elevate vascular senescence. Intraperitoneal glucose tolerance (IPGTT) and insulin sensitivity test (IST) were employed to investigate the effects of S100A9 on insulin resistance. Inflammation response was reflected by the concen-tration of inflammatory cytokines. The Toll-like receptor 4 (TLR4) and receptor for advanced glycation end products (RAGE) inhibitors were used to identify the downstream molecular mechanisms of S100A9 in aging -induced senescence in endothelial cells. Results: S100A9 expression in vascular increased with aging in mice and humans. Deficiency of S100A9 alleviated vascular senescence in aged mice, as evidenced by increased telomere length, Sirtuin activity, and eNOS activity. Meanwhile, S100A9 knockout improved endothelium-dependent vasodilatation and endothelial continuity in aged mice. Moreover, the increased insulin resistance, oxidative stress, and inflammation were mitigated by S100A9 deletion in aged mice. In vitro, S100A9 induced senescence in endothelial cells, and that effect was blunted by TLR4 but not RAGE inhibitors. Conclusion: The present study suggested that S100A9 may contribute to aging-related pathologies and endothelial dysfunction via the TLR4 pathway. Therefore, targeting S100A9/TLR4 signaling pathway may represent a crucial therapeutic strategy to prevent age-related cardiovascular diseases."

基金机构："National Natural Science Foundation of China [82200422]; Science Fund of the First Affiliated Hospital of Chongqing Medical University [PYJJ2021-05]; China Post-doctoral Science Foundation [2022M720601]; Natural Science foundation of Chongqing [W0168]; Program for Youth Innovation in Future Medicine, Chongqing Medical University [CYYY-BSHPYXM-202204]; Postdoctoral Incubation Project of The First Affiliated Hospital of Chongqing Medical University; [CSTB2022NSCQ-MSX0913]"

基金资助正文："This work was supported by the National Natural Science Foundation of China grants (82200422) , Science Fund of the First Affiliated Hospital of Chongqing Medical University (PYJJ2021-05) , the China Post- doctoral Science Foundation (2022M720601) , the Postdoctoral Incubation Project of The First Affiliated Hospital of Chongqing Medical University (CYYY-BSHPYXM-202204) , the Natural Science foundation of Chongqing (CSTB2022NSCQ-MSX0913) and Program for Youth Innovation in Future Medicine, Chongqing Medical University (W0168) ."