American journal of physiology. Lung cellular and molecular physiology最新文献

筛选
英文 中文
Opportunity knocks: the fourth cohort of the American Journal of Physiology-Lung Cellular and Molecular Physiology Early Career Editorial Fellowship Program. 机会敲门:美国生理学杂志-肺细胞和分子生理学早期职业编辑奖学金计划的第四届队列。
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-09-01 Epub Date: 2025-07-23 DOI: 10.1152/ajplung.00238.2025
Larissa A Shimoda, Cristina M Alvira, Julie A Bastarache, Rodney D Britt, Rachel S Knipe, Wolfgang M Kuebler, Thiago S Moreira, Eric P Schmidt
{"title":"Opportunity knocks: the fourth cohort of the <i>American Journal of Physiology-Lung Cellular and Molecular Physiology</i> Early Career Editorial Fellowship Program.","authors":"Larissa A Shimoda, Cristina M Alvira, Julie A Bastarache, Rodney D Britt, Rachel S Knipe, Wolfgang M Kuebler, Thiago S Moreira, Eric P Schmidt","doi":"10.1152/ajplung.00238.2025","DOIUrl":"10.1152/ajplung.00238.2025","url":null,"abstract":"","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L324-L326"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144697384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bioenergetics and metabolism of the pulmonary endothelium. Scientific session I: ReSPIRE 2025. 肺内皮的生物能量学和代谢:科学会议1,呼吸2025。
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-09-01 Epub Date: 2025-08-11 DOI: 10.1152/ajplung.00222.2025
Reece P Stevens, Justin T Roberts, Wolfgang M Kuebler, Ji Young Lee, Karthik Suresh, Rebecca F Hough
{"title":"Bioenergetics and metabolism of the pulmonary endothelium. Scientific session I: ReSPIRE 2025.","authors":"Reece P Stevens, Justin T Roberts, Wolfgang M Kuebler, Ji Young Lee, Karthik Suresh, Rebecca F Hough","doi":"10.1152/ajplung.00222.2025","DOIUrl":"10.1152/ajplung.00222.2025","url":null,"abstract":"<p><p>Session I of the inaugural biennial Research Symposium on Pulmonary Injury and Repair of the Endothelium (ReSPIRE) highlighted recent advances in endothelial bioenergetics and metabolism and their role in pulmonary vascular diseases. Emerging evidence suggests that the maladaptation of metabolic pathways in the lung endothelium contributes to the progression of the acute respiratory distress syndrome (ARDS) and pulmonary arterial hypertension (PAH). The conference highlighted several new aspects of endothelial metabolism, including the use of alternative fuel sources such as fructose and fatty acids, inflammatory signaling mediated by mitochondrial depolarization, bioenergetic reprogramming through isoform switching of genes during hypoxia, and feedback regulation of metabolism by hypercapnia. Ultimately, these findings point to future research directions aimed at identifying mechanisms of dysregulated endothelial metabolism, which could serve as therapeutic targets for pulmonary vascular diseases.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L389-L396"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144820292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A spatial transcriptomic atlas of acute neonatal lung injury across development and disease severity. 跨发育和疾病严重程度的急性新生儿肺损伤的空间转录组图谱。
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-09-01 Epub Date: 2025-08-01 DOI: 10.1152/ajplung.00191.2025
Saahithi Mallapragada, Ruqian Lyu, Arianna L Williams-Katek, Brandon K Fischer, Annika Vannan, Niran Hadad, Evan D Mee, Shawyon P Shirazi, Christopher S Jetter, Nicholas M Negretti, Anne Hilgendorff, Laurie C Eldredge, Gail H Deutsch, Davis J McCarthy, Jonathan A Kropski, Jennifer M S Sucre, Nicholas E Banovich
{"title":"A spatial transcriptomic atlas of acute neonatal lung injury across development and disease severity.","authors":"Saahithi Mallapragada, Ruqian Lyu, Arianna L Williams-Katek, Brandon K Fischer, Annika Vannan, Niran Hadad, Evan D Mee, Shawyon P Shirazi, Christopher S Jetter, Nicholas M Negretti, Anne Hilgendorff, Laurie C Eldredge, Gail H Deutsch, Davis J McCarthy, Jonathan A Kropski, Jennifer M S Sucre, Nicholas E Banovich","doi":"10.1152/ajplung.00191.2025","DOIUrl":"10.1152/ajplung.00191.2025","url":null,"abstract":"<p><p>A molecular understanding of lung organogenesis requires delineation of the timing and regulation of the cellular transitions that ultimately form and support a surface capable of gas exchange. Although the advent of single-cell transcriptomics has allowed for the discovery and identification of transcriptionally distinct cell populations present during lung development, the spatiotemporal dynamics of these transcriptional shifts remain undefined. With imaging-based spatial transcriptomics, we analyzed the gene expression patterns in 17 human infant lungs at varying stages of development and injury, creating a spatial transcriptomic atlas of approximately 1.2 million cells. We applied computational clustering approaches to identify shared molecular patterns among this cohort, informing how tissue architecture and molecular spatial relationships are coordinated during development and disrupted in disease. Recognizing that all preterm birth represents an injury to the developing lung, we created a simplified classification scheme that relies upon the routinely collected objective measures of gestational age and lifespan. Within this framework, we have identified cell type patterns across gestational age and life span variables that would likely be overlooked when using the conventional \"disease versus control\" binary comparison. Together, these data represent an open resource for the lung research community, supporting discovery-based inquiry and identification of targetable molecular mechanisms in both normal and arrested human lung development.<b>NEW & NOTEWORTHY</b> Mapping the spatial and temporal transcriptional relationships during lung development is fundamental to understanding regeneration and chronic lung disease; however, the classification of samples as control or disease is especially challenging in the setting of preterm birth (itself a lung injury). Here, we report the largest neonatal lung transcriptomic atlas to date and an analysis framework based only on gestational age and lifespan, providing a new resource for hypothesis generation to the lung community.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L376-L388"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144764370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A cannabinoid receptor 1 inverse agonist induces weight loss and reduces airway hyperresponsiveness in a mouse model of obese asthma. 大麻素受体1逆激动剂在肥胖哮喘小鼠模型中诱导体重减轻并降低气道高反应性。
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-09-01 Epub Date: 2025-07-24 DOI: 10.1152/ajplung.00049.2025
Carolyn R Morris, Ravishankar Chandrasekaran, Isabella M Butzirus, Nirav Daphtary, Minara Aliyeva, Allison M Manuel, William G Tharp, Jason H T Bates, Vikas Anathy, Matthew E Poynter, Jianmin Duan, Geneviève Gaucher, Glenn D Crater, Anne E Dixon
{"title":"A cannabinoid receptor 1 inverse agonist induces weight loss and reduces airway hyperresponsiveness in a mouse model of obese asthma.","authors":"Carolyn R Morris, Ravishankar Chandrasekaran, Isabella M Butzirus, Nirav Daphtary, Minara Aliyeva, Allison M Manuel, William G Tharp, Jason H T Bates, Vikas Anathy, Matthew E Poynter, Jianmin Duan, Geneviève Gaucher, Glenn D Crater, Anne E Dixon","doi":"10.1152/ajplung.00049.2025","DOIUrl":"10.1152/ajplung.00049.2025","url":null,"abstract":"<p><p>Most people with severe asthma have obesity. Metabolic dysfunction, often associated with obesity, is particularly associated with severe asthma. Mechanisms linking metabolic dysfunction with asthma, and whether improving metabolic function can affect asthma, are not known. The endocannabinoid system plays a significant role in metabolism; inhibition of cannabinoid receptor 1 (CB<sub>1</sub>R) induces weight loss and improves serum lipid profiles. We used a CB<sub>1</sub>R inverse agonist, INV-202, in a mouse model of obese asthma and investigated changes in weight, inflammation, airway reactivity, and surfactant lipids. Mice were fed low or high-fat diets (LFD, HFD), and house dust mite (HDM) extract was delivered intranasally to induce allergic airway inflammation. Mice received INV-202 by oral gavage. Airway hyperresponsiveness was measured by FlexiVent, and lung tissue cytokines were measured by ELISA. Leukocytes and lipids in the bronchoalveolar lavage fluid (BALF) were analyzed by flow cytometry and mass spectroscopy, respectively. LFD and HFD mice lost an average of 11% and 27% of their body weight, respectively. LFD mice had a 33% decrease in CCL20 in lung tissue and a 55% decrease in neutrophils in BALF. LFD and HFD mice had improvements in airway hyperresponsiveness, particularly as measured by reduced elastance. Phosphatidylglycerol in BALF increased with INV-202, which significantly correlated with compliance in LFD mice. This study supports a significant contribution of metabolic factors related to the endocannabinoid system in lung compliance and airway reactivity, in part through effects on surfactant lipid composition, and demonstrates the potential of CB<sub>1</sub>R inverse agonists to treat obese asthma.<b>NEW & NOTEWORTHY</b> Inhibition of the cannabinoid receptor 1, through a pharmacological inverse agonist, not only induces weight loss in a mouse model of obese asthma but also reduces airway hyperresponsiveness, particularly through decreasing elastance/increasing compliance.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L327-L340"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144706044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Yes-associated protein induces age-dependent inflammatory signaling in the pulmonary endothelium. yes相关蛋白在肺内皮中诱导年龄依赖性炎症信号
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-09-01 Epub Date: 2025-07-24 DOI: 10.1152/ajplung.00178.2025
Memet T Emin, Alexandra M Dubuisson, Prisha Sujin Kumar, Carsten Knutsen, Cristina M Alvira, Rebecca F Hough
{"title":"Yes-associated protein induces age-dependent inflammatory signaling in the pulmonary endothelium.","authors":"Memet T Emin, Alexandra M Dubuisson, Prisha Sujin Kumar, Carsten Knutsen, Cristina M Alvira, Rebecca F Hough","doi":"10.1152/ajplung.00178.2025","DOIUrl":"10.1152/ajplung.00178.2025","url":null,"abstract":"<p><p>Acute lung injury (ALI) causes the highly lethal acute respiratory distress syndrome (ARDS) in children and adults, for which therapy is lacking. Children with pediatric ARDS have a mortality rate that is about half of adults with ARDS. Improved ALI measures can be reproduced in rodent models with juvenile animals, suggesting that physiologic differences may underlie these outcomes. Here, we show that pneumonia-induced ALI caused inflammatory signaling in the endothelium of adult mice, which depended on Yes-associated protein (YAP). This signaling was not present in 21-day-old weanling mice. Transcriptomic analysis of lung endothelial responses revealed nuclear factor-kappa B (NF-κB) as significantly increased with ALI in adult versus weanling mice. Blockade of YAP signaling protected against inflammatory response, hypoxemia, and NF-κB nuclear translocation in response to <i>Pseudomonas aeruginosa</i> pneumonia in adult mice. Our results demonstrate an important signaling cascade in the lung endothelium of adult mice that is not present in weanlings. We suggest other pathways may also exhibit age-dependent signaling, which would have important implications for ARDS therapeutics in the adult and pediatric age groups.<b>NEW & NOTEWORTHY</b> Like human patients, adult mice get worse lung injury than juveniles. In pneumonia-induced lung injury, Yes-associated protein is more highly expressed in the endothelium of adult mice than juveniles, causing more NF-κB nuclear translocation and inflammation. This could partly explain better outcomes in kids with pediatric acute respiratory distress syndrome as compared with adults with ARDS.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L315-L322"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12358178/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144706045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low tidal volume ventilation facilitates spontaneous increase in bronchoconstriction and air trapping that can be resolved by deep inspiration and bronchodilator. 低潮气量通气促进支气管收缩和空气潴留的自发增加:通过深吸气和支气管扩张剂解决。
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-08-01 Epub Date: 2025-07-01 DOI: 10.1152/ajplung.00085.2025
Yuto Yasuda, Geoffrey N Maksym, Lu Wang, Pasquale Chitano, Chun Y Seow
{"title":"Low tidal volume ventilation facilitates spontaneous increase in bronchoconstriction and air trapping that can be resolved by deep inspiration and bronchodilator.","authors":"Yuto Yasuda, Geoffrey N Maksym, Lu Wang, Pasquale Chitano, Chun Y Seow","doi":"10.1152/ajplung.00085.2025","DOIUrl":"10.1152/ajplung.00085.2025","url":null,"abstract":"<p><p>Prolonged absence of deep inspiration (DI) increases airway resistance. The underlying mechanism is not entirely clear. We hypothesize that DI prohibition allows basal airway smooth muscle (ASM) tone to narrow and close airways over time, resulting in elevation of airway and lung resistance, as well as air trapping. We further hypothesize that DI or pharmacological bronchodilators can prevent or alleviate the resistance increase and air trapping. Physiological respiration was simulated in ex vivo sheep lungs. Lung resistance, elastance, and volume were measured using small tidal volume (120 mL), ventilation frequencies of 0.25 and 2 Hz, and transpulmonary pressure of 7.5 cmH<sub>2</sub>O in the presence and absence of DI and bronchodilators. A DI maneuver, involving rapid inflation to total lung capacity followed by deflation to zero transpulmonary pressure, was used to resolve air trapping. Lung resistance and elastance were recorded pre- and post-DI. The experiments were also conducted in the presence of the bronchodilator salbutamol to assess the role of ASM. Ventilation without DI increased lung resistance and elastance, as well as air trapping. DI effectively resolved air trapping, restoring resistance and elastance to their initial values. Salbutamol also alleviated the increase in lung resistance, elastance, and air trapping. DI prevented air trapping and reduced lung resistance and elastance in ex vivo sheep lungs during tidal ventilation, playing a similar role as a pharmacological bronchodilator.<b>NEW & NOTEWORTHY</b> We showed that air trapping is a consistent feature in ex vivo sheep lungs possessing spontaneous bronchoconstriction, when the lungs are ventilated with small tidal volume without intermittent deep inspirations. We further demonstrated that in the presence of salbutamol, air trapping does not occur. This explains the importance of deep inspirations in normal breathing and indicates that airway smooth muscle tone could result in air trapping in the absence of deep inspiration.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L225-L233"},"PeriodicalIF":3.5,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combining innovative methodologies with deep personal connections to further physiology research: lessons from Joseph D. Brain, ScD. 结合创新的方法和深入的个人联系,进一步的生理学研究:Joseph D. Brain理学博士的经验教训。
IF 3.6 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-08-01 Epub Date: 2025-06-02 DOI: 10.1152/ajplung.00281.2024
Jeffrey J Fredberg, Joseph P Mizgerd
{"title":"Combining innovative methodologies with deep personal connections to further physiology research: lessons from Joseph D. Brain, ScD.","authors":"Jeffrey J Fredberg, Joseph P Mizgerd","doi":"10.1152/ajplung.00281.2024","DOIUrl":"10.1152/ajplung.00281.2024","url":null,"abstract":"","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L197-L199"},"PeriodicalIF":3.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144198044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intrauterine inflammation-induced neonatal lung injury via succinic acid-mediated alveolar epithelial E-cadherin downregulation. 宫内炎症通过琥珀酸介导的肺泡上皮E-cadherin下调诱导新生儿肺损伤。
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-08-01 Epub Date: 2025-07-11 DOI: 10.1152/ajplung.00322.2024
Baihe Li, Ze Chen, Dongting Yao, Wei Li, Qianqian Zhang, Meng Ni, Qianwen Shen, Zhenying Lin, Chunyu Cheng, Sudong Qi, Xiya Ding, Jiuru Zhao, Zhiwei Liu
{"title":"Intrauterine inflammation-induced neonatal lung injury via succinic acid-mediated alveolar epithelial E-cadherin downregulation.","authors":"Baihe Li, Ze Chen, Dongting Yao, Wei Li, Qianqian Zhang, Meng Ni, Qianwen Shen, Zhenying Lin, Chunyu Cheng, Sudong Qi, Xiya Ding, Jiuru Zhao, Zhiwei Liu","doi":"10.1152/ajplung.00322.2024","DOIUrl":"10.1152/ajplung.00322.2024","url":null,"abstract":"<p><p>Intrauterine inflammation is associated with lung injury in offspring and long-term adverse pulmonary outcomes, but the underlying mechanism remains elusive. This study aimed to investigate the underlying molecular mechanism from the perspective of metabolites. Pregnant C57BL/6 mice received an intraperitoneal injection of LPS on <i>gestational day 12.5</i> to establish an intrauterine inflammation model. The results showed that prenatal LPS exposure induced bronchopulmonary dysplasia (BPD)-like alveolar simplification. Then, by LC/MS untargeted metabolomics analysis, succinic acid was found to be elevated in murine placentas and preterm human umbilical cord blood with intrauterine inflammation. Besides, the expression of succinate dehydrogenase B subunit (Sdhb), a key catalytic enzyme of succinic acid, was downregulated in the murine placentas with intrauterine inflammation. Tail intravenous administration of <i>Sdhb</i> siRNA led to the accumulation of succinic acid in the placenta and aggravated LPS-induced lung injury in the offspring. In offspring mice, intrauterine inflammation decreased E-cadherin levels in lung tissue, which were further reduced by <i>Sdhb</i> siRNA injection. Conversely, overexpression of E-cadherin alleviated inflammation-induced lung injury. In vitro experiments revealed that succinic acid downregulated E-cadherin expression in alveolar epithelial cells through the PI3K/Akt/Hif-1α pathway. Succinic acid also indirectly downregulated the E-cadherin expression in alveolar epithelial cells by inducing macrophage M2 polarization and the production of Tgf-β1. In conclusion, this study demonstrates that succinic acid is a critical mediator of intrauterine inflammation-induced lung injury in offspring.<b>NEW & NOTEWORTHY</b> Intrauterine inflammation induces the accumulation of succinic acid in the placenta, which subsequently downregulated E-cadherin expression in the alveolar epithelial cells, thereby contributing to lung injury.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L282-L295"},"PeriodicalIF":3.5,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144607156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sirtuin 3 deficiency exacerbates emphysema and lung inflammation in a murine model of chronic obstructive pulmonary disease. Sirtuin 3缺乏在慢性阻塞性肺疾病小鼠模型中加重肺气肿和肺部炎症
IF 3.6 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-08-01 Epub Date: 2025-06-25 DOI: 10.1152/ajplung.00212.2024
Taro Ishimori, Minako Saito, Masaaki Yuki, Mototaka Hattori, Masahiro Shuzui, Saki Nagoshi, Shiho Kono, Hideaki Isago, Hiroyuki Tamiya, Naoya Miyashita, Takashi Ishii, Yu Mikami, Takahide Nagase, Yasuhiro Terasaki, Yoichi Shinozaki, Akihisa Mitani
{"title":"Sirtuin 3 deficiency exacerbates emphysema and lung inflammation in a murine model of chronic obstructive pulmonary disease.","authors":"Taro Ishimori, Minako Saito, Masaaki Yuki, Mototaka Hattori, Masahiro Shuzui, Saki Nagoshi, Shiho Kono, Hideaki Isago, Hiroyuki Tamiya, Naoya Miyashita, Takashi Ishii, Yu Mikami, Takahide Nagase, Yasuhiro Terasaki, Yoichi Shinozaki, Akihisa Mitani","doi":"10.1152/ajplung.00212.2024","DOIUrl":"10.1152/ajplung.00212.2024","url":null,"abstract":"<p><p>Chronic obstructive pulmonary disease (COPD) is a progressive lung disease caused mainly by cigarette smoke-mediated induction of oxidative stress. Sirtuin 3 (SIRT3) regulates reactive oxygen species levels, but there are no definitive reports on its role in COPD pathogenesis. We hypothesized that SIRT3 plays a protective role in COPD. First, we observed significantly reduced SIRT3 expression in COPD lungs and identified smoking as a suppressive factor for SIRT3 expression in the airway epithelium. Next, we analyzed the lung phenotypes of SIRT3 knockout (KO) mice and SIRT3-overexpressing transgenic (OE) mice, and induced a COPD model in these mice using elastase and lipopolysaccharide. We subsequently investigated the effects of SIRT3 on cytokine production, oxidative stress, and apoptosis in airway epithelial cells in vitro. SIRT3 knockout mice exhibited increased expression of apoptosis markers, and aged SIRT3 KO mice and SIRT3 KO COPD model mice exhibited a worsened emphysematous phenotype. By contrast, this effect was mitigated in SIRT3 OE COPD model mice. In vitro studies revealed that SIRT3 deficiency exacerbated inflammation, oxidative stress, and apoptosis in airway epithelial cells. We concluded that SIRT3 plays a vital role in COPD pathogenesis and could be a novel therapeutic target.<b>NEW & NOTEWORTHY</b> Our study is the first to elucidate the protective role of SIRT3 in the pathogenesis of COPD by modulating inflammatory responses and apoptosis. We have demonstrated that SIRT3 knockout mice spontaneously develop emphysema, and SIRT3 overexpression reduced elastase and LPS-induced emphysematous changes. In vitro studies have shown that SIRT3 deficiency leads to increased inflammation, oxidative stress, and apoptosis in airway and alveolar epithelium, contributing to the formation and exacerbation of emphysema.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L200-L213"},"PeriodicalIF":3.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144482793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carbonic anhydrase IX promotes acute lung injury and mortality in females during metabolic acidosis and pneumonia. 碳酸酐酶IX促进代谢性酸中毒和肺炎期间女性急性肺损伤和死亡率。
IF 3.5 2区 医学
American journal of physiology. Lung cellular and molecular physiology Pub Date : 2025-08-01 Epub Date: 2025-07-07 DOI: 10.1152/ajplung.00331.2024
Reece P Stevens, Jacob Holston, Karam Maatouk, Chun Zhou, Madeline Stone, Viktoriya V Pastukh, C Michael Francis, Sagar Kumar, Meredith S Gwin, Sarah L Sayner, Troy Stevens, Ji Young Lee
{"title":"Carbonic anhydrase IX promotes acute lung injury and mortality in females during metabolic acidosis and pneumonia.","authors":"Reece P Stevens, Jacob Holston, Karam Maatouk, Chun Zhou, Madeline Stone, Viktoriya V Pastukh, C Michael Francis, Sagar Kumar, Meredith S Gwin, Sarah L Sayner, Troy Stevens, Ji Young Lee","doi":"10.1152/ajplung.00331.2024","DOIUrl":"10.1152/ajplung.00331.2024","url":null,"abstract":"<p><p>Carbonic anhydrase IX (CA IX) is a unique transmembrane CA isoform that is associated with chronic pulmonary vascular diseases and is upregulated in the lungs during infection. Whether CA IX contributes to alveolar-capillary dysfunction in the acute respiratory distress syndrome (ARDS) is unknown. Here, we tested the hypothesis that CA IX promotes acute lung injury during metabolic acidosis and pneumonia. Wild-type (WT) and CA IX knockout (KO) mice were fed 0.5% sucrose water (control) or 0.28 M NH<sub>4</sub>Cl + 0.5% sucrose water for 7 days to induce metabolic acidosis, followed by intratracheal instillation of bacteria. Metabolic acidosis by itself did not cause pulmonary edema but modestly increased the lung wet-to-dry ratio in WT mice during pneumonia. A major sex difference in outcome was seen, where WT females had a higher filtration coefficient (<i>K</i><sub>f</sub>) in the isolated perfused lung and increased mortality compared with KO females. The <i>K</i><sub>f</sub> of WT and KO males did not differ; however, WT males had a 20% lower survival rate than KO males. In vitro expression of CA IX in pulmonary microvascular endothelial cells increased gap formation in the cell monolayer compared with KO cells during infection. No difference in lung bacterial clearance and plasma cytokines were seen between WT and KO mice regardless of sex. Thus, we report that CA IX promotes lung permeability and mortality but does not affect lung bacterial clearance, suggesting that CA IX may facilitate lung injury by directly affecting alveolar-capillary permeability and may serve as a therapeutic target in ARDS.<b>NEW & NOTEWORTHY</b> Acidosis is prevalent in patients with ARDS, yet the mechanisms involved in alveolar-capillary dysfunction during metabolic acidosis and lung injury remain poorly defined. Here, we report that carbonic anhydrase IX, a unique pH regulatory protein, promotes pulmonary edema and mortality but does not affect lung bacterial clearance during metabolic acidosis and pneumonia. Our findings suggest that carbonic anhydrase IX may serve as a therapeutic target to alleviate lung injury in patients with acidosis and ARDS.</p>","PeriodicalId":7593,"journal":{"name":"American journal of physiology. Lung cellular and molecular physiology","volume":" ","pages":"L266-L281"},"PeriodicalIF":3.5,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12305884/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信