1
|
Wang Y, Huang X, Luo G, Xu Y, Deng X, Lin Y, Wang Z, Zhou S, Wang S, Chen H, Tao T, He L, Yang L, Yang L, Chen Y, Jin Z, He C, Han Z, Zhang X. The aging lung: microenvironment, mechanisms, and diseases. Front Immunol 2024; 15:1383503. [PMID: 38756780 PMCID: PMC11096524 DOI: 10.3389/fimmu.2024.1383503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 04/16/2024] [Indexed: 05/18/2024] Open
Abstract
With the development of global social economy and the deepening of the aging population, diseases related to aging have received increasing attention. The pathogenesis of many respiratory diseases remains unclear, and lung aging is an independent risk factor for respiratory diseases. The aging mechanism of the lung may be involved in the occurrence and development of respiratory diseases. Aging-induced immune, oxidative stress, inflammation, and telomere changes can directly induce and promote the occurrence and development of lung aging. Meanwhile, the occurrence of lung aging also further aggravates the immune stress and inflammatory response of respiratory diseases; the two mutually affect each other and promote the development of respiratory diseases. Explaining the mechanism and treatment direction of these respiratory diseases from the perspective of lung aging will be a new idea and research field. This review summarizes the changes in pulmonary microenvironment, metabolic mechanisms, and the progression of respiratory diseases associated with aging.
Collapse
Affiliation(s)
- Yanmei Wang
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Institute of Traditional Chinese Medicine of Sichuan Academy of Chinese Medicine Sciences (Sichuan Second Hospital of T.C.M), Chengdu, China
| | - Xuewen Huang
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Guofeng Luo
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yunying Xu
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiqian Deng
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yumeng Lin
- Eye School of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Zhanzhan Wang
- Department of Respiratory and Critical Care Medicine, The First People’s Hospital of Lianyungang, Lianyungang, China
| | - Shuwei Zhou
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Siyu Wang
- Department of Gastroenterology, The First Hospital of Hunan University of Chinese Medicine, Changsha, China
| | - Haoran Chen
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Tao Tao
- Institute of Traditional Chinese Medicine of Sichuan Academy of Chinese Medicine Sciences (Sichuan Second Hospital of T.C.M), Chengdu, China
| | - Lei He
- Institute of Traditional Chinese Medicine of Sichuan Academy of Chinese Medicine Sciences (Sichuan Second Hospital of T.C.M), Chengdu, China
| | - Luchuan Yang
- Institute of Traditional Chinese Medicine of Sichuan Academy of Chinese Medicine Sciences (Sichuan Second Hospital of T.C.M), Chengdu, China
| | - Li Yang
- Institute of Traditional Chinese Medicine of Sichuan Academy of Chinese Medicine Sciences (Sichuan Second Hospital of T.C.M), Chengdu, China
| | - Yutong Chen
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zi Jin
- Department of Anesthesiology and Pain Rehabilitation, Shanghai YangZhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), School of Medicine, Tongji University, Shanghai, China
| | - Chengshi He
- Department of Respiratory, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Zhongyu Han
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaohong Zhang
- Department of Emergency Medicine Center, Sichuan Province People’s Hospital University of Electronic Science and Technology of China, Chengdu, China
| |
Collapse
|
2
|
Dobner S, Tóth F, de Rooij LPMH. A high-resolution view of the heterogeneous aging endothelium. Angiogenesis 2024; 27:129-145. [PMID: 38324119 PMCID: PMC11021252 DOI: 10.1007/s10456-023-09904-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 12/28/2023] [Indexed: 02/08/2024]
Abstract
Vascular endothelial cell (EC) aging has a strong impact on tissue perfusion and overall cardiovascular health. While studies confined to the investigation of aging-associated vascular readouts in one or a few tissues have already drastically expanded our understanding of EC aging, single-cell omics and other high-resolution profiling technologies have started to illuminate the intricate molecular changes underlying endothelial aging across diverse tissues and vascular beds at scale. In this review, we provide an overview of recent insights into the heterogeneous adaptations of the aging vascular endothelium. We address critical questions regarding tissue-specific and universal responses of the endothelium to the aging process, EC turnover dynamics throughout lifespan, and the differential susceptibility of ECs to acquiring aging-associated traits. In doing so, we underscore the transformative potential of single-cell approaches in advancing our comprehension of endothelial aging, essential to foster the development of future innovative therapeutic strategies for aging-associated vascular conditions.
Collapse
Affiliation(s)
- Sarah Dobner
- The CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Fanni Tóth
- The CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Laura P M H de Rooij
- The CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.
| |
Collapse
|
3
|
Wang Y, Yi Y, Zhang F, Yao YY, Chen YX, Wu CM, Wang RY, Yan M. Lung Ultrasound Score as a Predictor of Failure to Wean COVID-19 Elderly Patients off Mechanical Ventilation: A Prospective Observational Study. Clin Interv Aging 2024; 19:313-322. [PMID: 38404479 PMCID: PMC10887876 DOI: 10.2147/cia.s438714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 02/06/2024] [Indexed: 02/27/2024] Open
Abstract
Background The lung ultrasound score was developed for rapidly assessing the extent of lung ventilation, and it can predict failure to wean various types of patients off mechanical ventilation. Whether it is also effective for COVID-19 patients is unclear. Methods This single-center, prospective, observational study was conducted to assess the ability of the 12-region lung ultrasound score to predict failure to wean COVID-19 patients off ventilation. In parallel, we assessed whether right hemidiaphragmatic excursion or previously published predictors of weaning failure can apply to these patients. Predictive ability was assessed in terms of the area under the receiver operating characteristic curve (AUC). Results The mean age of the 35 patients in the study was (75 ± 9) years and 12 patients (37%) could not be weaned off mechanical ventilation. The lung ultrasound score predicted these failures with an AUC of 0.885 (95% CI 0.770-0.999, p < 0.001), and a threshold score of 10 provided specificity of 72.7% and sensitivity of 92.3%. AUCs were lower for previously published predictors of weaning failure, and right hemidiaphragmatic excursion did not differ significantly between the two groups. Conclusion The lung ultrasound score can accurately predict failure to wean critically ill COVID-19 patients off mechanical ventilation, whereas assessment of right hemidiaphragmatic excursion does not appear helpful in this regard. Trial Registration https://clinicaltrials.gov/ct2/show/NCT05706441.
Collapse
Affiliation(s)
- Ying Wang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221004, People’s Republic of China
| | - Yu Yi
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221004, People’s Republic of China
| | - Fan Zhang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221004, People’s Republic of China
| | - Yuan-Yuan Yao
- Department of Anesthesiology, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310016, People’s Republic of China
| | - Yue-Xiu Chen
- Department of Anesthesiology, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310016, People’s Republic of China
| | - Chao-Min Wu
- Department of Anesthesiology, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310016, People’s Republic of China
| | - Rui-Yu Wang
- Department of Anesthesiology, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310016, People’s Republic of China
| | - Min Yan
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221004, People’s Republic of China
- Department of Anesthesiology, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310016, People’s Republic of China
| |
Collapse
|
4
|
Chen Y, Wang L, Huang ZS, Feng JX, Li SX, Du ZJ, Zhang ZB, Liu J, Yang J, Hu ZM, Wang ZL, Chen J. Cytoskeletal protein SPTA1 mediating the decrease in erectile function induced by high-fat diet via Hippo signaling pathway. Andrology 2023; 11:591-610. [PMID: 36374586 DOI: 10.1111/andr.13338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 11/01/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND The mechanism of high-fat diet (HFD)-induced decrease in erectile function has not been elucidated, and in previous studies, spectrin alpha, erythrocytic 1 (SPTA1) is a cytoskeletal protein that regulates cellular function, which belongs to a family of proteins that can affect cell and tissue growth and development by regulating YAP, an effector on the Hippo signaling pathway, but its particular role has not been elucidated. OBJECTIVE To explore the role of SPTA1 in the abnormality of erectile function induced by HFD. METHODS We analyzed the penile tissues of mice on normal diet and HFD by transcriptomics and screened for differentially expressed genes, further identified closely related target genes in rat penile tissues, and verified target gene expression in in vitro construction of high-glucose (HG)-treated corpus cavernosum endothelial cells (CCECs) and corpus cavernosum smooth muscle cells (CCSMCs) models. The distribution of target genes in various cell populations in penile tissues was retrieved by single-cell sequencing Male Health Atlas database. Moreover, interfering with target genes was further applied to explore the mechanisms involved in erectile function decline. RESULTS Transcriptomic analysis screened out down-regulated differential gene SPTA1; Western blot and immunohistochemistry results showed that SPTA1 expression significantly decreased in the penile tissues of Sprague-Dawley (SD) rats in the HFD group. Immunofluorescence staining showed a positive expression of CD31 and VWF in CCECs and a positive expression of α-SMA in CCSMCs. The expression level of SPTA1 protein significantly decreased in the HG group of CCECs and CCSMCs. The expression of SPTA1 mRNA significantly decreased in CCSMCs while significantly increased in CCECs. SPTA1 may have various expression patterns and biological functions in different cell populations. Real-time quantitative PCR results showed that the siSPTA1 transfected in CCSMCs had a significant interference effect compared with the control siNC. Transfection of siSPTA1 into CCSMCs resulted in the significant down-regulation of mRNA and protein expression of eNOS, and significant up-regulation of YAP, Caspase-1, GSDMD, GSDMD-N IL-18, and IL-1β protein expression levels. The expression level of CCSMCs contractile-type protein α-SMA was significantly down-regulated. CONCLUSIONS The down-regulation of SPTA1 in SD rats fed with HFD may induce cell pyroptosis and lead to the decrease of erectile function by activating the Hippo pathway; these findings may provide new therapeutic targets for improving erectile function.
Collapse
Affiliation(s)
- Ying Chen
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Graduate School, Guangxi University of Chinese Medicine, Nanning, China
| | - Lei Wang
- Guangdong Provincial Key Laboratory for Crop Germplasm Resources Preservation and Utilization, Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Zhan-Sen Huang
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jia-Xin Feng
- Department of Urinary Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Shi-Xiong Li
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zi-Jun Du
- Graduate School, Guangxi University of Chinese Medicine, Nanning, China
| | - Ze-Bo Zhang
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jing Liu
- Guangdong Provincial Key Laboratory for Crop Germplasm Resources Preservation and Utilization, Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Jian Yang
- Department of Veterinary Teaching Hospital, Huazhong Agricultural University, Wu han, China
| | - Zhi-Ming Hu
- Department of Urinary Surgery, Meizhou People's Hospital (Huangtang Hospital), Meizhou, Guangdong, China
| | - Zhi-Lin Wang
- Guangdong Provincial Key Laboratory for Crop Germplasm Resources Preservation and Utilization, Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Jun Chen
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
5
|
Role of cellular senescence in inflammatory lung diseases. Cytokine Growth Factor Rev 2023; 70:26-40. [PMID: 36797117 DOI: 10.1016/j.cytogfr.2023.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/05/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023]
Abstract
Cellular senescence, a characteristic sign of aging, classically refers to permanent cell proliferation arrest and is a vital contributor to the pathogenesis of cancer and age-related illnesses. A lot of imperative scientific research has shown that senescent cell aggregation and the release of senescence-associated secretory phenotype (SASP) components can cause lung inflammatory diseases as well. In this study, the most recent scientific progress on cellular senescence and phenotypes was reviewed, including their impact on lung inflammation and the contributions of these findings to understanding the underlying mechanisms and clinical relevance of cell and developmental biology. Within a dozen pro-senescent stimuli, the irreparable DNA damage, oxidative stress, and telomere erosion are all crucial in the long-term accumulation of senescent cells, resulting in sustained inflammatory stress activation in the respiratory system. An emerging role for cellular senescence in inflammatory lung diseases was proposed in this review, followed by the identification of the main ambiguities, thus further understanding this event and the potential to control cellular senescence and pro-inflammatory response activation. In addition, novel therapeutic strategies for the modulation of cellular senescence that might help to attenuate inflammatory lung conditions and improve disease outcomes were also presented in this research.
Collapse
|
6
|
Fang T, Yang J, Liu L, Xiao H, Wei X. Nicotinamide mononucleotide ameliorates senescence in alveolar epithelial cells. MedComm (Beijing) 2021; 2:279-287. [PMID: 34766147 PMCID: PMC8491199 DOI: 10.1002/mco2.62] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 12/04/2020] [Accepted: 02/07/2021] [Indexed: 02/05/2023] Open
Abstract
Alveolar epithelial cells (ACEs) gradually senescent as aging, which is one of the main causes of respiratory defense and function decline. Investigating the mechanisms of ACE senescence is important for understanding how the human respiratory system works. NAD+ is reported to reduce during the aging process. Supplementing NAD+ intermediates can activate sirtuin deacylases (SIRT1–SIRT7), which regulates the benefits of exercise and dietary restriction, reduce the level of intracellular oxidative stress, and improve mitochondrial function, thereby reversing cell senescence. We showed that nicotinamide mononucleotide (NMN) could effectively mitigate age‐associated physiological decline in the lung of 8–10 months old C57BL/6 mice and bleomycin‐induced pulmonary fibrosis in young mice of 6–8 weeks. Besides, the treatment of primary ACEs with NMN can markedly ameliorate cell senescence phenotype in vitro. These findings to improve the respiratory system function and reduce the incidence and mortality from respiratory diseases in the elderly are of great significance.
Collapse
Affiliation(s)
- Tingting Fang
- Department of CardiologyWest China HospitalSichuan UniversityChengduChina
| | - Jingyun Yang
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and National Collaborative Innovation CenterChengduChina
| | - Li Liu
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and National Collaborative Innovation CenterChengduChina
| | - Hengyi Xiao
- Lab of Aging Research and NanotoxicologyState Key Laboratory of Biotherapy and Cancer CenterNational Clinical Research Center for GeriatricsWest China HospitalSichuan University and National Collaborative Innovation CenterChengduChina
| | - Xiawei Wei
- Lab of Aging Research and NanotoxicologyState Key Laboratory of Biotherapy and Cancer CenterNational Clinical Research Center for GeriatricsWest China HospitalSichuan University and National Collaborative Innovation CenterChengduChina
| |
Collapse
|
7
|
Lao M, Zhang K, Zhang M, Wang Q, Li J, Su L, Ding M, He W, Gong Y. Clinical Features and Co-Infections in Invasive Pulmonary Aspergillosis in Elderly Patients. Infect Drug Resist 2020; 13:3525-3534. [PMID: 33116671 PMCID: PMC7567571 DOI: 10.2147/idr.s273946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 09/19/2020] [Indexed: 12/12/2022] Open
Abstract
Introduction Invasive pulmonary aspergillosis (IPA) is a potentially lethal opportunistic infection. Old age is one of the important risk factors of IPA. However, data regarding the clinical characteristics and prognostic factors of elderly patients with IPA are limited, with data regarding co-infection of other bacteria or fungi even scarcer. Methods We performed a retrospective study of elderly patients (aged≥60) with IPA diagnosed in the First Affiliated Hospital of Sun Yat-sen University from January 2000 to December 2019. Data collection included demographic characteristics, premorbid conditions, underlying diseases, clinical manifestations, therapeutic procedures, and pathogenic detection. Associated factors were analyzed by logistic regression analysis. Results A total of 97 elderly patients (75 males, 22 females) with IPA were included. The all-cause mortality rate was 36.1% (35/97). Body mass index (BMI) (adjusted odds ratio (OR) 1.27, 95% confidence interval (CI) 1.08–1.50, P=0.01), solid organ malignancy (adjusted OR 5.37, 95% CI 1.35–21.33, P=0.02), and co-infections (adjusted OR 5.73, 95% CI 1.40–23.51, P=0.02) were associated with mortality in the elderly patients with IPA. Nearly, 76.3% (74/97) of the patients developed co-infections. Most of the infections (55/74, 74.3%) involved the lung. A total of 77 strains of bacteria were isolated, and Gram-negative bacteria (63/77, 81.3%) were predominant. Patients with co-infections are older (72.3±7.6 vs 67.4±7.4, P=0.04), prone to admit to the intensive care unit (ICU) (59.5% vs 26.1%, P=0.01), and present lymphopenia (60.8% vs 26.1%, P=0.004). In multivariate analysis, ICU admission (adjusted OR 4.57, 95% CI 1.53–13.67, P=0.01), and lymphopenia (adjusted OR 4.82, 95% CI 1.62–14.38, P=0.01) were significantly associated with co-infection in the elderly patients with IPA. Conclusion IPA is a fatal disease in the elderly population. Co-infection is closely associated with mortality. Lymphopenia could be an indicator for co-infection in the elderly patients with IPA.
Collapse
Affiliation(s)
- Minxi Lao
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Kaicong Zhang
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Meng Zhang
- Department of Pathology, Shenzhen Second People's Hospital/The First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, People's Republic of China
| | - Qian Wang
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Jin Li
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Lei Su
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Meilin Ding
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Wen He
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Yingying Gong
- Department of Geriatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| |
Collapse
|
8
|
Caporarello N, Meridew JA, Aravamudhan A, Jones DL, Austin SA, Pham TX, Haak AJ, Moo Choi K, Tan Q, Haresi A, Huang SK, Katusic ZS, Tschumperlin DJ, Ligresti G. Vascular dysfunction in aged mice contributes to persistent lung fibrosis. Aging Cell 2020; 19:e13196. [PMID: 32691484 PMCID: PMC7431829 DOI: 10.1111/acel.13196] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 05/28/2020] [Accepted: 06/21/2020] [Indexed: 12/23/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive disease thought to result from impaired lung repair following injury and is strongly associated with aging. While vascular alterations have been associated with IPF previously, the contribution of lung vasculature during injury resolution and fibrosis is not well understood. To compare the role of endothelial cells (ECs) in resolving and non-resolving models of lung fibrosis, we applied bleomycin intratracheally to young and aged mice. We found that injury in aged mice elicited capillary rarefaction, while injury in young mice resulted in increased capillary density. ECs from the lungs of injured aged mice relative to young mice demonstrated elevated pro-fibrotic and reduced vascular homeostasis gene expression. Among the latter, Nos3 (encoding the enzyme endothelial nitric oxide synthase, eNOS) was transiently upregulated in lung ECs from young but not aged mice following injury. Young mice deficient in eNOS recapitulated the non-resolving lung fibrosis observed in aged animals following injury, suggesting that eNOS directly participates in lung fibrosis resolution. Activation of the NO receptor soluble guanylate cyclase in human lung fibroblasts reduced TGFβ-induced pro-fibrotic gene and protein expression. Additionally, loss of eNOS in human lung ECs reduced the suppression of TGFβ-induced lung fibroblast activation in 2D and 3D co-cultures. Altogether, our results demonstrate that persistent lung fibrosis in aged mice is accompanied by capillary rarefaction, loss of EC identity, and impaired eNOS expression. Targeting vascular function may thus be critical to promote lung repair and fibrosis resolution in aging and IPF.
Collapse
Affiliation(s)
- Nunzia Caporarello
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Jeffrey A Meridew
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Aja Aravamudhan
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Dakota L Jones
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Susan A Austin
- Department of Anesthesiology and Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - Tho X Pham
- Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Andrew J Haak
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Kyoung Moo Choi
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Qi Tan
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Adil Haresi
- Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Steven K Huang
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Zvonimir S Katusic
- Department of Anesthesiology and Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, USA
| | | | - Giovanni Ligresti
- Department of Medicine, Boston University School of Medicine, Boston, MA, USA
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| |
Collapse
|
9
|
Impact of Influenza on Pneumococcal Vaccine Effectiveness during Streptococcus pneumoniae Infection in Aged Murine Lung. Vaccines (Basel) 2020; 8:vaccines8020298. [PMID: 32545261 PMCID: PMC7349919 DOI: 10.3390/vaccines8020298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/19/2020] [Accepted: 06/09/2020] [Indexed: 11/17/2022] Open
Abstract
Changes in innate and adaptive immune responses caused by viral imprinting can have a significant direct or indirect influence on secondary infections and vaccine responses. The purpose of our current study was to investigate the role of immune imprinting by influenza on pneumococcal vaccine effectiveness during Streptococcus pneumoniae infection in the aged murine lung. Aged adult (18 months) mice were vaccinated with the pneumococcal polyvalent vaccine Pneumovax (5 mg/mouse). Fourteen days post vaccination, mice were instilled with PBS or influenza A/PR8/34 virus (3.5 × 102 PFU). Control and influenza-infected mice were instilled with PBS or S. pneumoniae (1 × 103 CFU, ATCC 6303) on day 7 of infection and antibacterial immune responses were assessed in the lung. Our results illustrate that, in response to a primary influenza infection, there was diminished bacterial clearance and heightened production of pro-inflammatory cytokines, such as IL6 and IL1β. Vaccination with Pneumovax decreased pro-inflammatory cytokine production by modulating NFҡB expression; however, these responses were significantly diminished after influenza infection. Taken together, the data in our current study illustrate that immune imprinting by influenza diminishes pneumococcal vaccine efficacy and, thereby, may contribute to increased susceptibility of older persons to a secondary infection with S. pneumoniae.
Collapse
|
10
|
Farooq MA, Gaertner S, Amoura L, Niazi ZR, Park SH, Qureshi AW, Oak MH, Toti F, Schini-Kerth VB, Auger C. Intake of omega-3 formulation EPA:DHA 6:1 by old rats for 2 weeks improved endothelium-dependent relaxations and normalized the expression level of ACE/AT1R/NADPH oxidase and the formation of ROS in the mesenteric artery. Biochem Pharmacol 2019; 173:113749. [PMID: 31830469 DOI: 10.1016/j.bcp.2019.113749] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 12/06/2019] [Indexed: 01/21/2023]
Abstract
Omega-3 polyunsaturated fatty acids (PUFAs) including eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have been shown to protect the cardiovascular system, in part, by stimulating the endothelial formation of nitric oxide (NO). EPA:DHA 6:1 has been identified as a potent omega 3 PUFA formulation to induce endothelium-dependent vasorelaxation and activation of endothelial NO synthase (eNOS). This study examined whether intake of EPA:DHA 6:1 (500 mg/kg/day) for 2 weeks improves an established endothelial dysfunction in old rats (20 months old), and, if so, the underlying mechanism was subsequently determined. In the main mesenteric artery rings, an endothelial dysfunction characterized by a blunted NO component, an abolished endothelium-dependent hyperpolarization component, and increased endothelium-dependent contractile responses (EDCFs) are observed in old rats compared to young rats. Age-related endothelial dysfunction was associated with increased vascular formation of reactive oxygen species (ROS) and expression of eNOS, components of the local angiotensin system, senescence markers, and cyclooxygenase-2 (COX-2), and the downregulation of COX-1. The EPA:DHA 6:1 treatment improved the NO-mediated relaxation, reduced the EDCF-dependent contractile response and the vascular formation of ROS, and normalized the expression level of all target proteins in the old arterial wall. Thus, the present findings indicate that a 2-week intake of EPA:DHA 6:1 by old rats restored endothelium-dependent NO-mediated relaxations, most likely, by preventing the upregulation of the local angiotensin system and the subsequent formation of ROS.
Collapse
Affiliation(s)
- Muhammad A Farooq
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France
| | - Sébastien Gaertner
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Hôpitaux Universitaire de Strasbourg (HUS), Service des Maladies Vasculaires - Hypertension Artérielle, 67000 Strasbourg, France
| | - Lamia Amoura
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France
| | - Zahid R Niazi
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France
| | - Sin-Hee Park
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France
| | - Abdul W Qureshi
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France
| | - Min-Ho Oak
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France
| | - Florence Toti
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France
| | - Valérie B Schini-Kerth
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France; Hôpitaux Universitaire de Strasbourg (HUS), Service des Maladies Vasculaires - Hypertension Artérielle, 67000 Strasbourg, France
| | - Cyril Auger
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, 67000 Strasbourg, France; Université de Strasbourg, Faculté de Pharmacie, 67000 Strasbourg, France.
| |
Collapse
|
11
|
Abstract
People worldwide are living longer, and it is estimated that by 2050, the proportion of the world's population over 60 years of age will nearly double. Natural lung aging is associated with molecular and physiological changes that cause alterations in lung function, diminished pulmonary remodeling and regenerative capacity, and increased susceptibility to acute and chronic lung diseases. As the aging population rapidly grows, it is essential to examine how alterations in cellular function and cell-to-cell interactions of pulmonary resident cells and systemic immune cells contribute to a higher risk of increased susceptibility to infection and development of chronic diseases, such as chronic obstructive pulmonary disease and interstitial pulmonary fibrosis. This review provides an overview of physiological, structural, and cellular changes in the aging lung and immune system that facilitate the development and progression of disease.
Collapse
Affiliation(s)
- Soo Jung Cho
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Weill Cornell Medicine, New York, NY 10065, USA;
| | - Heather W Stout-Delgado
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Weill Cornell Medicine, New York, NY 10065, USA;
| |
Collapse
|
12
|
Angelidis I, Simon LM, Fernandez IE, Strunz M, Mayr CH, Greiffo FR, Tsitsiridis G, Ansari M, Graf E, Strom TM, Nagendran M, Desai T, Eickelberg O, Mann M, Theis FJ, Schiller HB. An atlas of the aging lung mapped by single cell transcriptomics and deep tissue proteomics. Nat Commun 2019; 10:963. [PMID: 30814501 PMCID: PMC6393476 DOI: 10.1038/s41467-019-08831-9] [Citation(s) in RCA: 331] [Impact Index Per Article: 66.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 02/01/2019] [Indexed: 12/30/2022] Open
Abstract
Aging promotes lung function decline and susceptibility to chronic lung diseases, which are the third leading cause of death worldwide. Here, we use single cell transcriptomics and mass spectrometry-based proteomics to quantify changes in cellular activity states across 30 cell types and chart the lung proteome of young and old mice. We show that aging leads to increased transcriptional noise, indicating deregulated epigenetic control. We observe cell type-specific effects of aging, uncovering increased cholesterol biosynthesis in type-2 pneumocytes and lipofibroblasts and altered relative frequency of airway epithelial cells as hallmarks of lung aging. Proteomic profiling reveals extracellular matrix remodeling in old mice, including increased collagen IV and XVI and decreased Fraser syndrome complex proteins and collagen XIV. Computational integration of the aging proteome with the single cell transcriptomes predicts the cellular source of regulated proteins and creates an unbiased reference map of the aging lung. Aging impacts lung functionality and makes it more susceptible to chronic diseases. Combining proteomics and single cell transcriptomics, the authors chart molecular and cellular changes in the aging mouse lung, discover aging hallmarks, and predict the cellular sources of regulated proteins.
Collapse
Affiliation(s)
- Ilias Angelidis
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Lukas M Simon
- Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany
| | - Isis E Fernandez
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Maximilian Strunz
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Christoph H Mayr
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Flavia R Greiffo
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - George Tsitsiridis
- Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany
| | - Meshal Ansari
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany.,Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany
| | - Elisabeth Graf
- Helmholtz Zentrum München, Institute of Human Genetics, Munich, 85764, Germany
| | - Tim-Matthias Strom
- Helmholtz Zentrum München, Institute of Human Genetics, Munich, 85764, Germany
| | - Monica Nagendran
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, 94305, CA, USA
| | - Tushar Desai
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, 94305, CA, USA
| | - Oliver Eickelberg
- Department of Medicine, Division of Respiratory Sciences and Critical Care Medicine, University of Colorado, Aurora, 80045, CO, USA
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Munich, 82152, Germany
| | - Fabian J Theis
- Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany. .,Department of Mathematics, Technische Universität München, Munich, 85748, Germany.
| | - Herbert B Schiller
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany.
| |
Collapse
|
13
|
Angelidis I, Simon LM, Fernandez IE, Strunz M, Mayr CH, Greiffo FR, Tsitsiridis G, Ansari M, Graf E, Strom TM, Nagendran M, Desai T, Eickelberg O, Mann M, Theis FJ, Schiller HB. An atlas of the aging lung mapped by single cell transcriptomics and deep tissue proteomics. Nat Commun 2019; 10:963. [PMID: 30814501 DOI: 10.1101/351353] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 02/01/2019] [Indexed: 05/28/2023] Open
Abstract
Aging promotes lung function decline and susceptibility to chronic lung diseases, which are the third leading cause of death worldwide. Here, we use single cell transcriptomics and mass spectrometry-based proteomics to quantify changes in cellular activity states across 30 cell types and chart the lung proteome of young and old mice. We show that aging leads to increased transcriptional noise, indicating deregulated epigenetic control. We observe cell type-specific effects of aging, uncovering increased cholesterol biosynthesis in type-2 pneumocytes and lipofibroblasts and altered relative frequency of airway epithelial cells as hallmarks of lung aging. Proteomic profiling reveals extracellular matrix remodeling in old mice, including increased collagen IV and XVI and decreased Fraser syndrome complex proteins and collagen XIV. Computational integration of the aging proteome with the single cell transcriptomes predicts the cellular source of regulated proteins and creates an unbiased reference map of the aging lung.
Collapse
Affiliation(s)
- Ilias Angelidis
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Lukas M Simon
- Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany
| | - Isis E Fernandez
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Maximilian Strunz
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Christoph H Mayr
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - Flavia R Greiffo
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
| | - George Tsitsiridis
- Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany
| | - Meshal Ansari
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany
- Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany
| | - Elisabeth Graf
- Helmholtz Zentrum München, Institute of Human Genetics, Munich, 85764, Germany
| | - Tim-Matthias Strom
- Helmholtz Zentrum München, Institute of Human Genetics, Munich, 85764, Germany
| | - Monica Nagendran
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, 94305, CA, USA
| | - Tushar Desai
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, 94305, CA, USA
| | - Oliver Eickelberg
- Department of Medicine, Division of Respiratory Sciences and Critical Care Medicine, University of Colorado, Aurora, 80045, CO, USA
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Munich, 82152, Germany
| | - Fabian J Theis
- Helmholtz Zentrum München, Institute of Computational Biology, Munich, 85764, Germany.
- Department of Mathematics, Technische Universität München, Munich, 85748, Germany.
| | - Herbert B Schiller
- Helmholtz Zentrum München, Institute of Lung Biology and Disease, Member of the German Center for Lung Research (DZL), Munich, 85764, Germany.
| |
Collapse
|
14
|
Coffman KE, Boeker MG, Carlson AR, Johnson BD. Age-dependent effects of thoracic and capillary blood volume distribution on pulmonary artery pressure and lung diffusing capacity. Physiol Rep 2018; 6:e13834. [PMID: 30175463 PMCID: PMC6119697 DOI: 10.14814/phy2.13834] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/29/2018] [Indexed: 12/05/2022] Open
Abstract
Aging is associated with pulmonary vascular remodeling and reduced distensibility. We investigated the influence of aging on changes in cardiac output (Q), mean pulmonary artery pressure (mPAP), and lung diffusing capacity in response to alterations in thoracic blood volume. The role of pulmonary smooth muscle tone was also interrogated via pulmonary vasodilation. Nine younger (27 ± 4 years) and nine older (71 ± 4 years) healthy adults reached steady-state in a Supine (0°), Upright (+20°), or Head-down (-20°) position in order to alter thoracic blood volume. In each position, echocardiography was performed to calculate mPAP and Q, and lung diffusing capacity for carbon monoxide (DLCO) and nitric oxide (DLNO) was assessed. Next, 100 mg sildenafil was administered to reduce pulmonary smooth muscle tone, after which the protocol was repeated. mPAP (P ≤ 0.029) and Q (P ≤ 0.032) were lower in the Upright versus Supine and Head-down positions, and mPAP was reduced following sildenafil administration (P = 0.019), in older adults only. SV was lower in the Upright versus Supine and Head-down positions in both younger (P ≤ 0.008) and older (P ≤ 0.003) adults. DLCO and DLNO were not greatly altered by position changes or sildenafil administration. However, the DLNO/DLCO ratio was lower in the Supine and/or Head-down positions (P ≤ 0.05), but higher following sildenafil administration (P ≤ 0.007), in both younger and older adults. In conclusion, older adults experience greater cardiopulmonary alterations following thoracic blood volume changes, and pulmonary smooth muscle tone plays a role in resting mPAP in older adults only. Furthermore, mPAP is an important determinant of pulmonary capillary blood volume distribution (DLNO/DLCO), regardless of age.
Collapse
Affiliation(s)
| | | | - Alex R. Carlson
- Department of Cardiovascular DiseasesMayo ClinicRochesterMinnesota
| | - Bruce D. Johnson
- Department of Cardiovascular DiseasesMayo ClinicRochesterMinnesota
| |
Collapse
|
15
|
Huang CG, Lee LA, Wu YC, Hsiao MJ, Horng JT, Kuo RL, Huang CH, Lin YC, Tsao KC, Chen MC, Chen TC, Shih SR. A pilot study on primary cultures of human respiratory tract epithelial cells to predict patients' responses to H7N9 infection. Oncotarget 2018; 9:14492-14508. [PMID: 29581859 PMCID: PMC5865685 DOI: 10.18632/oncotarget.24537] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 02/10/2018] [Indexed: 12/23/2022] Open
Abstract
Avian influenza A(H7N9) virus infections frequently lead to acute respiratory distress syndrome and death in humans. We aimed to investigate whether primary cultures of human respiratory tract epithelial cells are helpful to understand H7N9 virus pathogenesis and tissue tropism, and to evaluate how patient-related characteristics can affect the host's response to infection. Normal human bronchial epithelial cells (isolated from two different donors) and primary epithelial cells (harvested from 27 patients undergoing airway surgery) were experimentally infected with H7N9 and/or H1N1pdm for 72 h. After virus infection, the culture media were collected for viral RNA quantitation and cytokine detection. Both H7N9 and H1N1pdm viruses replicated and induced a cytokine response differently for each donor in the normal human bronchial epithelial model. H7N9 replicated equivalently in epithelial cells harvested from the inferior turbinate and paranasal sinus, and those from the larynx and bronchus, at 72 h post-infection. Viral RNA quantity at 72 h was significantly higher in patients aged 21-64 years than in patients aged ≥ 65 years; however, no effects of sex, medical comorbidities, and obesity were noted. H7N9-infected cultured cells released multiple cytokines within 72 h. Levels of interleukin-1β, interleukin-6, interleukin-8, interferon-γ, and tumor necrosis factor-α were associated differently with patient-related characteristics (such as age, sex, obesity, and medical comorbidities). In the era of precision medicine, these findings illustrate the potential utility of this primary culture approach to predict a host's response to H7N9 infection or to future infection by newly emerging viral infections, and to dissect viral pathogenesis.
Collapse
Affiliation(s)
- Chung-Guei Huang
- Research Center for Emerging Viral Infections, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Graduate Institute of Biomedical Sciences, Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC
| | - Li-Ang Lee
- Department of Otorhinolaryngology - Head and Neck Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC.,Faculty of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC
| | - Yi-Cheng Wu
- Faculty of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Department of Surgery, Linkou Chang Gung Memorial Hospital, Chang Gung University, Taoyuan 33305, Taiwan, ROC
| | - Mei-Jen Hsiao
- Research Center for Emerging Viral Infections, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC
| | - Jim-Tong Horng
- Research Center for Emerging Viral Infections, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Graduate Institute of Biomedical Sciences, Department of Biochemistry and Molecular Biology, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC
| | - Rei-Lin Kuo
- Research Center for Emerging Viral Infections, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Graduate Institute of Biomedical Sciences, Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC
| | - Chih-Heng Huang
- Research Center for Emerging Viral Infections, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Institute of Preventive Medicine, National Defense Medical Center, Taipei 11490, Taiwan, ROC
| | - Ya-Chu Lin
- Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC
| | - Kuo-Chien Tsao
- Research Center for Emerging Viral Infections, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC
| | - Min-Chi Chen
- Faculty of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Department of Public Health and Biostatistics Consulting Center, Chang Gung University, Taoyuan 33302, Taiwan, ROC
| | - Tse-Ching Chen
- Faculty of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Department of Pathology, Linkou Chang Gung Memorial Hospital, Chang Gung University, Taoyuan 33305, Taiwan, ROC
| | - Shin-Ru Shih
- Research Center for Emerging Viral Infections, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Graduate Institute of Biomedical Sciences, Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC.,Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC
| |
Collapse
|
16
|
Kandasamy J, Olave N, Ballinger SW, Ambalavanan N. Vascular Endothelial Mitochondrial Function Predicts Death or Pulmonary Outcomes in Preterm Infants. Am J Respir Crit Care Med 2017; 196:1040-1049. [PMID: 28485984 DOI: 10.1164/rccm.201702-0353oc] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
RATIONALE Vascular endothelial mitochondrial dysfunction contributes to the pathogenesis of several oxidant stress-associated disorders. Oxidant stress is a major contributor to the pathogenesis of bronchopulmonary dysplasia (BPD), a chronic lung disease of prematurity that often leads to sequelae in adult survivors. OBJECTIVES This study was conducted to identify whether differences in mitochondrial bioenergetic function and oxidant generation in human umbilical vein endothelial cells (HUVECs) obtained from extremely preterm infants were associated with risk for BPD or death before 36 weeks postmenstrual age. METHODS HUVEC oxygen consumption and superoxide and hydrogen peroxide generation were measured in 69 infants. MEASUREMENTS AND MAIN RESULTS Compared with HUVECs from infants who survived without BPD, HUVECs obtained from infants who developed BPD or died had a lower maximal oxygen consumption rate (mean ± SEM, 107 ± 8 vs. 235 ± 22 pmol/min/30,000 cells; P < 0.001), produced more superoxide after exposure to hyperoxia (mean ± SEM, 89,807 ± 16,616 vs. 162,706 ± 25,321 MitoSOX Red fluorescence units; P < 0.05), and released more hydrogen peroxide into the supernatant after hyperoxia exposure (mean ± SEM, 1,879 ± 278 vs. 842 ± 119 resorufin arbitrary fluorescence units; P < 0.001). CONCLUSIONS Our results indicating that endothelial cells of premature infants who later develop BPD or die have impaired mitochondrial bioenergetic capacity and produce more oxidants at birth suggest that the vascular endothelial mitochondrial dysfunction seen at birth in these infants persists through their postnatal life and contributes to adverse pulmonary outcomes and increased early mortality.
Collapse
Affiliation(s)
| | | | - Scott W Ballinger
- 2 Department of Pathology, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Namasivayam Ambalavanan
- 1 Department of Pediatrics and.,2 Department of Pathology, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| |
Collapse
|
17
|
Johar D. Cytoskeletal remodeling and regulation of cell fate in the hypertensive neonatal pulmonary artery in response to stress. J Cell Physiol 2017; 233:2146-2161. [DOI: 10.1002/jcp.25950] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 04/11/2017] [Indexed: 01/07/2023]
Affiliation(s)
- Dina Johar
- Department of Physiology and Pathophysiology; Rady College of Medicine; Max Rady Faculty of Health Sciences; University of Manitoba; Winnipeg Manitoba Canada
| |
Collapse
|
18
|
Wong PF, Jamal J, Tong KL, Khor ES, Yeap CE, Jong HL, Lee ST, Mustafa MR, Abubakar S. Deregulation of hsa-miR-20b expression in TNF-α-induced premature senescence of human pulmonary microvascular endothelial cells. Microvasc Res 2017; 114:26-33. [PMID: 28595801 DOI: 10.1016/j.mvr.2017.06.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 06/01/2017] [Accepted: 06/03/2017] [Indexed: 10/19/2022]
Abstract
miRNAs are important regulators of cellular senescence yet the extent of their involvement remains to be investigated. We sought to identify miRNAs that are involved in cytokine-induced premature senescence (CIPS) in endothelial cells. CIPS was established in young human pulmonary microvascular endothelial cells (HMVEC-Ls) following treatment with a sublethal dose (20ng/ml) of tumor necrosis factor alpha (TNF-α) for 15days. In parallel, HMVEC-Ls were grown and routinely passaged until the onset of replicative senescence (RS). Differential expression analysis following miRNA microarray profiling revealed an overlapped of eight deregulated miRNAs in both the miRNA profiles of RS and TNF-α-induced premature senescence cells. Amongst the deregulated miRNAs were members of the miR 17-92 cluster which are known regulators of angiogenesis. The role of hsa-miR-20b in TNF-α-induced premature senescence, a paralog member of the miR 17-92 cluster, was further investigated. Biotin-labeled hsa-miR-20b captured the enriched transcripts of retinoblastoma-like 1 (RBL1), indicating that RBL1 is a target of hsa-miR-20b. Knockdown of hsa-miR-20b attenuated premature senescence in the TNF-α-treated HMVEC-Ls as evidenced by increased cell proliferation, increased RBL1 mRNA expression level but decreased protein expression of p16INK4a, a cellular senescence marker. These findings provide an early insight into the role of hsa-miR-20b in endothelial senescence.
Collapse
Affiliation(s)
- Pooi-Fong Wong
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
| | - Juliana Jamal
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kind-Leng Tong
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Eng-Soon Khor
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Chia-Earn Yeap
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Hui-Lan Jong
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Sui-Ting Lee
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohd Rais Mustafa
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Sazaly Abubakar
- Department of Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| |
Collapse
|
19
|
Pandi-Perumal SR, BaHammam AS, Ojike NI, Akinseye OA, Kendzerska T, Buttoo K, Dhandapany PS, Brown GM, Cardinali DP. Melatonin and Human Cardiovascular Disease. J Cardiovasc Pharmacol Ther 2017; 22:122-132. [DOI: 10.1177/1074248416660622] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
The possible therapeutic role of melatonin in the pathophysiology of coronary artery disorder (CAD) is increasingly being recognized. In humans, exogenous melatonin has been shown to decrease nocturnal hypertension, improve systolic and diastolic blood pressure, reduce the pulsatility index in the internal carotid artery, decrease platelet aggregation, and reduce serum catecholamine levels. Low circulating levels of melatonin are reported in individuals with CAD, arterial hypertension, and congestive heart failure. This review assesses current literature on the cardiovascular effects of melatonin in humans. It can be concluded that melatonin deserves to be considered in clinical trials evaluating novel therapeutic interventions for cardiovascular disorders.
Collapse
Affiliation(s)
- Seithikurippu R. Pandi-Perumal
- Department of Medicine, College of Medicine, The University Sleep Disorders Center, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed S. BaHammam
- Department of Medicine, College of Medicine, The University Sleep Disorders Center, King Saud University, Riyadh, Saudi Arabia
| | - Nwakile I. Ojike
- Division of Health and Behavior, Department of Population Health, New York University Medical Center, Center for Healthful Behavior Change, New York, NY, USA
| | - Oluwaseun A. Akinseye
- Department of Internal Medicine, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York, NY, USA
- CUNY School of Public Health at Brooklyn College, New York, NY, USA
| | - Tetyana Kendzerska
- Institute for Clinical Evaluative Sciences, Sunnybrook Health Sciences Center, Toronto, Ontario, Canada
| | | | - Perundurai S. Dhandapany
- The Knight Cardiovascular Institute, Oregon Health and Science University, Portland, OR, USA
- Department of Medicine, Oregon Health and Science University, Portland, OR, USA
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Portland, OR, USA
- Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Biology and Regenerative Medicine (inStem), Bangalore, India
| | - Gregory M. Brown
- Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada
| | - Daniel P. Cardinali
- BIOMED-UCA-CONICET and Department of Teaching and Research, Faculty of Medical Sciences, Pontificia Universidad Católica Argentina, Buenos Aires, Argentina
| |
Collapse
|
20
|
|
21
|
Khemais-Benkhiat S, Idris-Khodja N, Ribeiro TP, Silva GC, Abbas M, Kheloufi M, Lee JO, Toti F, Auger C, Schini-Kerth VB. The Redox-sensitive Induction of the Local Angiotensin System Promotes Both Premature and Replicative Endothelial Senescence: Preventive Effect of a Standardized Crataegus Extract. J Gerontol A Biol Sci Med Sci 2015; 71:1581-1590. [PMID: 26672612 DOI: 10.1093/gerona/glv213] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 11/03/2015] [Indexed: 11/13/2022] Open
Abstract
Endothelial senescence, characterized by an irreversible cell cycle arrest, oxidative stress, and downregulation of endothelial nitric oxide synthase (eNOS), has been shown to promote endothelial dysfunction leading to the development of age-related vascular disorders. This study has assessed the possibility that the local angiotensin system promotes endothelial senescence in coronary artery endothelial cells and also the protective effect of the Crataegus extract WS1442, a quantified hawthorn extract. Serial passaging from P1 to P4 (replicative senescence) and treatment of P1 endothelial cells with the eNOS inhibitor L-NAME (premature senescence) promoted acquisition of markers of senescence, enhanced ROS formation, decreased eNOS expression, and upregulation of angiotensin-converting enzyme (ACE) and AT1 receptors. Increased SA-β-gal activity and the upregulation of ACE and AT1R in senescent cells were prevented by antioxidants, an ACE inhibitor, and by an AT1 receptor blocker. WS1442 prevented SA-β-gal activity, the downregulation of eNOS, and oxidative stress in P3 cells. These findings indicate that the impairment of eNOS-derived nitric oxide formation favors a pro-oxidant response triggering the local angiotensin system, which, in turn, promotes endothelial senescence. Such a sequence of events can be effectively inhibited by a standardized polyphenol-rich extract mainly by targeting the oxidative stress.
Collapse
Affiliation(s)
- Sonia Khemais-Benkhiat
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Noureddine Idris-Khodja
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Thais Porto Ribeiro
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Grazielle Caroline Silva
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Malak Abbas
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France.,EA 7293 Stress Vasculaire et Tissulaire en Transplantation, Faculté de Pharmacie, Université de Strasbourg. Illkirch, France
| | - Marouane Kheloufi
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Jung-Ok Lee
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Florence Toti
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Cyril Auger
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Valérie B Schini-Kerth
- UMR CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France.
| |
Collapse
|
22
|
Wu F, Szczepaniak WS, Shiva S, Liu H, Wang Y, Wang L, Wang Y, Kelley EE, Chen AF, Gladwin MT, McVerry BJ. Nox2-dependent glutathionylation of endothelial NOS leads to uncoupled superoxide production and endothelial barrier dysfunction in acute lung injury. Am J Physiol Lung Cell Mol Physiol 2014; 307:L987-97. [PMID: 25326583 DOI: 10.1152/ajplung.00063.2014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Microvascular barrier integrity is dependent on bioavailable nitric oxide (NO) produced locally by endothelial NO synthase (eNOS). Under conditions of limited substrate or cofactor availability or by enzymatic modification, eNOS may become uncoupled, producing superoxide in lieu of NO. This study was designed to investigate how eNOS-dependent superoxide production contributes to endothelial barrier dysfunction in inflammatory lung injury and its regulation. C57BL/6J mice were challenged with intratracheal LPS. Bronchoalveolar lavage fluid was analyzed for protein accumulation, and lung tissue homogenate was assayed for endothelial NOS content and function. Human lung microvascular endothelial cell (HLMVEC) monolayers were exposed to LPS in vitro, and barrier integrity and superoxide production were measured. Biopterin species were quantified, and coimmunoprecipitation (Co-IP) assays were performed to identify protein interactions with eNOS that putatively drive uncoupling. Mice exposed to LPS demonstrated eNOS-dependent increased alveolar permeability without evidence for altered canonical NO signaling. LPS-induced superoxide production and permeability in HLMVEC were inhibited by the NOS inhibitor nitro-l-arginine methyl ester, eNOS-targeted siRNA, the eNOS cofactor tetrahydrobiopterin, and superoxide dismutase. Co-IP indicated that LPS stimulated the association of eNOS with NADPH oxidase 2 (Nox2), which correlated with augmented eNOS S-glutathionylation both in vitro and in vivo. In vitro, Nox2-specific inhibition prevented LPS-induced eNOS modification and increases in both superoxide production and permeability. These data indicate that eNOS uncoupling contributes to superoxide production and barrier dysfunction in the lung microvasculature after exposure to LPS. Furthermore, the results implicate Nox2-mediated eNOS-S-glutathionylation as a mechanism underlying LPS-induced eNOS uncoupling in the lung microvasculature.
Collapse
Affiliation(s)
- Feng Wu
- University of Pittsburgh School of Medicine Department of Medicine, Division of Pulmonary Allergy and Critical Care Medicine, Pittsburgh, Pennsylvania
| | - William S Szczepaniak
- University of Pittsburgh School of Medicine Department of Medicine, Division of Pulmonary Allergy and Critical Care Medicine, Pittsburgh, Pennsylvania
| | - Sruti Shiva
- University of Pittsburgh Vascular Medicine Institute, Pittsburgh, Pennsylvania; University of Pittsburgh School of Medicine Department of Pharmacology, Pittsburgh, Pennsylvania
| | - Huanbo Liu
- University of Pittsburgh School of Medicine Department of Surgery, Pittsburgh, Pennsylvania
| | - Yinna Wang
- University of Pittsburgh Vascular Medicine Institute, Pittsburgh, Pennsylvania
| | - Ling Wang
- University of Pittsburgh Vascular Medicine Institute, Pittsburgh, Pennsylvania
| | - Ying Wang
- University of Pittsburgh School of Medicine Department of Medicine, Division of Pulmonary Allergy and Critical Care Medicine, Pittsburgh, Pennsylvania
| | - Eric E Kelley
- University of Pittsburgh Vascular Medicine Institute, Pittsburgh, Pennsylvania; University of Pittsburgh School of Medicine Department of Anesthesiology, Pittsburgh, Pennsylvania
| | - Alex F Chen
- University of Pittsburgh Vascular Medicine Institute, Pittsburgh, Pennsylvania; University of Pittsburgh School of Medicine Department of Surgery, Pittsburgh, Pennsylvania
| | - Mark T Gladwin
- University of Pittsburgh School of Medicine Department of Medicine, Division of Pulmonary Allergy and Critical Care Medicine, Pittsburgh, Pennsylvania; University of Pittsburgh Vascular Medicine Institute, Pittsburgh, Pennsylvania
| | - Bryan J McVerry
- University of Pittsburgh School of Medicine Department of Medicine, Division of Pulmonary Allergy and Critical Care Medicine, Pittsburgh, Pennsylvania; University of Pittsburgh Vascular Medicine Institute, Pittsburgh, Pennsylvania;
| |
Collapse
|
23
|
Li M, Liu W, Yuan T, Bai R, Liu GH, Zhang W, Qu J. DNA methylome: Unveiling your biological age. Protein Cell 2014; 4:723-5. [PMID: 24104390 DOI: 10.1007/s13238-013-3913-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Hannum and colleagues performed DNA methylation sequencing to examine the relationship between DNA methylome and aging rate. Notably, they succeeded in building a quantitative and reproducible model based on the epigenetic bio-markers to predict aging rate with high accuracy. This progress enlightens us in many aspects particularly in applying this novel set of bio-markers on studying the mechanism of aging rate using adult tissue-specific stem cells, building up a potential quantitative model to explore the mechanism for other epigenetic factors like non-coding RNA, and understanding the principle and mechanism of 3D chromatin structure in epigenetic modulation.
Collapse
Affiliation(s)
- Ming Li
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | | | | | | | | | | | | |
Collapse
|
24
|
Rogers SC, Zhang X, Azhar G, Luo S, Wei JY. Exposure to high or low glucose levels accelerates the appearance of markers of endothelial cell senescence and induces dysregulation of nitric oxide synthase. J Gerontol A Biol Sci Med Sci 2013; 68:1469-81. [PMID: 23585419 DOI: 10.1093/gerona/glt033] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
To test the hypothesis that aging impairs endothelial cell response to glucose stress, we utilized a human umbilical vein endothelial cell in vitro model in which clinically relevant concentrations of normal (5.5 mM), high (25 mM), and low (1.5mM) glucose were tested. With advancing population doubling, exposure to normal glucose gradually decreased endothelial nitric oxide synthase expression and activity, resulting in slow, progressive development of markers of cell senescence (by population doubling level [PDL] 44). High or low glucose treatment accelerated the appearance of markers of senescence (by ~PDL 35) along with declines in endothelial nitric oxide synthase expression and activity. Human umbilical vein endothelial cells exposed to alternating low and high glucose gave even more rapid acceleration in the appearance of markers of senescence (by ~PDL 18) and reduction in endothelial nitric oxide synthase levels. Thus, exposure to low and high glucose induces earlier appearance of markers of endothelial cell senescence and dysregulation of the nitric oxide synthase gene and protein expression and function. These findings will help to elucidate endothelial dysfunction associated with glucose intolerance and improve future therapy for diabetic seniors.
Collapse
Affiliation(s)
- Steven C Rogers
- Reynolds Institute on Aging, University of Arkansas for Medical Sciences, 629 Jack Stephens Drive, Little Rock, AR 72205.
| | | | | | | | | |
Collapse
|
25
|
Tucsek Z, Gautam T, Sonntag WE, Toth P, Saito H, Salomao R, Szabo C, Csiszar A, Ungvari Z. Aging exacerbates microvascular endothelial damage induced by circulating factors present in the serum of septic patients. J Gerontol A Biol Sci Med Sci 2012. [PMID: 23183901 DOI: 10.1093/gerona/gls232] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The elderly patients show a significantly elevated mortality rate during sepsis than younger patients, due to their higher propensity to microvascular dysfunction and consequential multiorgan failure. We tested whether aging renders vascular endothelial cells more susceptible to damage induced by inflammatory factors present in the circulation during sepsis. Primary microvascular endothelial cells derived from young (3 months) and aged (24 months) Fischer 344 × Brown Norway rats were treated with sera obtained from sepsis patients and healthy controls. Oxidative stress (MitoSox fluorescence), death receptor activation (caspase 8 activity), and apoptotic cell death (caspase 3 activity) induced by treatment with septic sera were exacerbated in aged endothelial cells as compared with responses obtained in young cells. Induction of heme oxygenase-1 and thrombomodulin in response to treatment with septic sera was impaired in aged endothelial cells. Treatment with septic sera elicited greater increases in tumor necrosis factor-α expression in aged endothelial cells, as compared with young cells, whereas induction of inducible nitric oxide synthase, intercellular adhesion molecule-1, and vascular cell adhesion molecule did not differ between the two groups. Collectively, aging increases sensitivity of microvascular endothelial cells (MVECs) to oxidative stress and cellular damage induced by inflammatory factors present in the circulation during septicemia. We hypothesize that these responses may contribute to the increased vulnerability of elderly patients to multiorgan failure associated with sepsis.
Collapse
Affiliation(s)
- Zsuzsanna Tucsek
- Department of Geriatric Medicine, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Perspectives on translational and therapeutic aspects of SIRT1 in inflammaging and senescence. Biochem Pharmacol 2012; 84:1332-9. [PMID: 22796566 DOI: 10.1016/j.bcp.2012.06.031] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 06/28/2012] [Accepted: 06/29/2012] [Indexed: 02/08/2023]
Abstract
Sirtuin1 (SIRT1), a type III protein deacetylase, is considered as a novel anti-aging protein involved in regulation of cellular senescence/aging and inflammation. SIRT1 level and activity are decreased during lung inflammaging caused by oxidative stress. The mechanism of SIRT1-mediated protection against inflammaging is associated with the regulation of inflammation, premature senescence, telomere attrition, senescence associated secretory phenotype, and DNA damage response. A variety of dietary polyphenols and pharmacological activators are shown to regulate SIRT1 so as to intervene the progression of type 2 diabetes, cancer, cardiovascular diseases, and chronic obstructive pulmonary disease associated with inflammaging. However, recent studies have shown the non-specific regulation of SIRT1 by the aforementioned pharmacological activators and polyphenols. In this perspective, we have briefly discussed the role of SIRT1 in regulation of cellular senescence and its associated secretory phenotype, DNA damage response, particularly in lung inflammaging and during the development of chronic obstructive pulmonary diseases. We have also discussed the potential directions for future translational therapeutic avenues for SIRT1 in modulating lung inflammaging associated with senescence in chronic lung diseases associated with increased oxidative stress.
Collapse
|
27
|
Huidobro C, Fernandez AF, Fraga MF. Aging epigenetics: causes and consequences. Mol Aspects Med 2012; 34:765-81. [PMID: 22771540 DOI: 10.1016/j.mam.2012.06.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 06/27/2012] [Indexed: 12/26/2022]
Abstract
Growth and development of higher organisms are regulated by the orchestrated change of epigenetic marks over time. In addition, there is also an epigenetic variation without any apparent role in development that is thought to be the result of the stochastic accumulation of epigenetic errors. The process depends on genetic and environmental factors and, when it takes place in adult stem cells, it could play an important role in aging, although the underlying molecular mechanisms are still largely unknown.
Collapse
Affiliation(s)
- Covadonga Huidobro
- Cancer Epigenetics Laboratory, Instituto Universitario de Oncología del Principado de Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | | | | |
Collapse
|
28
|
|