title: Sirtuin 1 Activator SRT1720 Protects Against Lung Injury via Reduction of Type II Alveolar Epithelial Cells Apoptosis in Emphysema.
abstract: In chronic obstructive pulmonary disease (COPD), two major pathological changes that occur are the loss of alveolar structure and airspace enlargement. Type II alveolar epithelial cells (AECII) play a vital role in maintaining alveolar homeostasis and lung tissue repair. Sirtuin 1 (SIRT1), a NAD(+)-dependent histone deacetylase, regulates many pathophysiological processes including inflammation, apoptosis, cellular senescence and stress resistance. The main aim of this study was to investigate whether SRT1720, a pharmacological SIRT1 activator, could protect against AECII apoptosis in rats with emphysema caused by cigarette smoke exposure and intratracheal lipopolysaccharide instillation in vivo. During the induction of emphysema in rats, administration of SRT1720 improved lung function including airway resistance and pulmonary dynamic compliance. SRT1720 treatment up-regulated the levels of surfactant protein (SP)A, SPC, SIRT1 and forkhead box O 3, increased SIRT1 activity, down-regulated the level of p53 and inhibited AECII apoptosis. Lung injury caused by emphysema was alleviated after SRT1720 treatment. SRT1720 could protect against AECII apoptosis in rats with emphysema and thus could be used in COPD treatment.
authors.affiliation: a Department of Respiratory Medicine , Zhejiang Provincial People's Hospital , Hangzhou , Zhejiang , P.R. China.
authors.forename: Chao
authors.initials: C
authors.lastname: Gu
authors.forename: Yaqing
authors.initials: Y
authors.lastname: Li
authors.forename: Wu-Lin
authors.initials: WL
authors.lastname: Xu
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Yan
authors.forename: Ying-jie
authors.initials: YJ
authors.lastname: Xia
authors.forename: Ying-Yu
authors.initials: YY
authors.lastname: Ma
authors.forename: Chun
authors.initials: C
authors.lastname: Chen
authors.forename: Hui-Ju
authors.initials: HJ
authors.lastname: Wang
authors.forename: Hou-quan
authors.initials: HQ
authors.lastname: Tao
mesh_terms: D056809:Alveolar Epithelial Cells / Q000187:drug effects* / Q000502:physiology; D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D015415:Biomarkers / Q000378:metabolism; D015153:Blotting, Western; D020536:Enzyme Activators / Q000494:pharmacology / Q000627:therapeutic use*; D006576:Heterocyclic Compounds, 4 or More Rings / Q000494:pharmacology / Q000627:therapeutic use*; D007150:Immunohistochemistry; D020287:In Situ Nick-End Labeling; D055370:Lung Injury / Q000209:etiology / Q000378:metabolism / Q000517:prevention & control*; D008297:Male; D011656:Pulmonary Emphysema / Q000150:complications / Q000188:drug therapy* / Q000378:metabolism; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D060888:Real-Time Polymerase Chain Reaction; D016896:Treatment Outcome
chemical_list: D015415:Biomarkers; D020536:Enzyme Activators; D006576:Heterocyclic Compounds, 4 or More Rings; C525422:SRT1720
keywords: alveolar epithelial cells; apoptosis; chronic obstructive pulmonary disease; sirtuin 1