1
|
He F, Wang QF, Li L, Yu C, Liu CZ, Wei WC, Chen LP, Li HY. Melatonin Protects Against Hyperoxia-Induced Apoptosis in Alveolar Epithelial type II Cells by Activating the MT2/PI3K/AKT/ETS1 Signaling Pathway. Lung 2023; 201:225-234. [PMID: 36928143 DOI: 10.1007/s00408-023-00610-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/02/2023] [Indexed: 03/18/2023]
Abstract
PURPOSE Hyperoxia-induced apoptosis in alveolar epithelial type II cells (AECIIs) plays a critical role in the development of bronchopulmonary dysplasia (BPD). Melatonin has been shown to improve BPD. However, the protective effect of melatonin on hyperoxia-induced apoptosis in AECIIs and the precise mechanisms involved remain unclear. METHODS Human alveolar epithelial type II A549 cells were treated with hyperoxia as an in vitro model to investigate the antiapoptotic mechanism of melatonin. CCK-8 assays were performed to investigate the viability of A549 cells. Hoechst 33,258 staining was carried out to quantify apoptosis in A549 cells. The protein expression levels of E26 oncogene homolog 1 (ETS1), Bcl-2, Bax, Bim, Wnt, β-catenin, AKT and phosphorylated AKT were measured by western blotting. LY294002, SC79 and the downregulation of ETS1, melatonin receptor 1 (MT1) and MT2 with specific siRNAs were used to investigate the role of the PI3K/AKT pathway, ETS1, MT1 and MT2 in hyperoxia-induced apoptosis in A549 cells. RESULTS Melatonin prevented hyperoxia-induced apoptosis in A549 cells, and the upregulation of E26 oncogene homolog 1 (ETS1) contributed to the antiapoptotic effect of melatonin. Melatonin activated the PI3K/AKT axis, which led to ETS1 upregulation and inhibited apoptosis in hyperoxia-exposed A549 cells. Furthermore, melatonin-induced activation of the PI3K/AKT axis, upregulation of ETS1 and inhibition of apoptosis were reversed by melatonin receptor 2 (MT2) siRNA in hyperoxia-exposed A549 cells. CONCLUSION Melatonin prevents hyperoxia-induced apoptosis by activating the MT2/PI3K/AKT/ETS1 axis in alveolar epithelial cells.
Collapse
Affiliation(s)
- Fan He
- Department of Neonatology, Jiangxi Provincial Children's Hospital, No. 1666, DieziHu Road, Honggutan District, Nanchang, 330038, Jiangxi, China
| | - Qiao-Fang Wang
- Department of Neonatology, Jiangxi Provincial Children's Hospital, No. 1666, DieziHu Road, Honggutan District, Nanchang, 330038, Jiangxi, China
| | - Lin Li
- Department of Neonatology, Jiangxi Provincial Children's Hospital, No. 1666, DieziHu Road, Honggutan District, Nanchang, 330038, Jiangxi, China
| | - Cong Yu
- Department of Neonatology, Jiangxi Provincial Children's Hospital, No. 1666, DieziHu Road, Honggutan District, Nanchang, 330038, Jiangxi, China
| | - Chun-Zi Liu
- Department of Neonatology, Jiangxi Provincial Children's Hospital, No. 1666, DieziHu Road, Honggutan District, Nanchang, 330038, Jiangxi, China
| | - Wen-Chao Wei
- Department of Neonatology, Jiangxi Provincial Children's Hospital, No. 1666, DieziHu Road, Honggutan District, Nanchang, 330038, Jiangxi, China
| | - Li-Ping Chen
- Department of Neonatology, Jiangxi Provincial Children's Hospital, No. 1666, DieziHu Road, Honggutan District, Nanchang, 330038, Jiangxi, China.
| | - Huan-Yu Li
- Second Department of Respiratory Disease, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, No. 152, Aiguo Road, DongHu District, Nanchang, 330006, Jiangxi, China.
| |
Collapse
|
2
|
MicroRNAs: Important Regulatory Molecules in Acute Lung Injury/Acute Respiratory Distress Syndrome. Int J Mol Sci 2022; 23:ijms23105545. [PMID: 35628354 PMCID: PMC9142048 DOI: 10.3390/ijms23105545] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/07/2022] [Accepted: 05/13/2022] [Indexed: 02/06/2023] Open
Abstract
Acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) is an overactivated inflammatory response caused by direct or indirect injuries that destroy lung parenchymal cells and dramatically reduce lung function. Although some research progress has been made in recent years, the pathogenesis of ALI/ARDS remains unclear due to its heterogeneity and etiology. MicroRNAs (miRNAs), a type of small noncoding RNA, play a vital role in various diseases. In ALI/ARDS, miRNAs can regulate inflammatory and immune responses by targeting specific molecules. Regulation of miRNA expression can reduce damage and promote the recovery of ALI/ARDS. Consequently, miRNAs are considered as potential diagnostic indicators and therapeutic targets of ALI/ARDS. Given that inflammation plays an important role in the pathogenesis of ALI/ARDS, we review the miRNAs involved in the inflammatory process of ALI/ARDS to provide new ideas for the pathogenesis, clinical diagnosis, and treatment of ALI/ARDS.
Collapse
|
3
|
Yang K, Dong W. SIRT1-Related Signaling Pathways and Their Association With Bronchopulmonary Dysplasia. Front Med (Lausanne) 2021; 8:595634. [PMID: 33693011 PMCID: PMC7937618 DOI: 10.3389/fmed.2021.595634] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 02/03/2021] [Indexed: 12/28/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a chronic and debilitating disease that can exert serious and overwhelming effects on the physical and mental health of premature infants, predominantly due to intractable short- and long-term complications. Oxidative stress is one of the most predominant causes of BPD. Hyperoxia activates a cascade of hazardous events, including mitochondrial dysfunction, uncontrolled inflammation, reduced autophagy, increased apoptosis, and the induction of fibrosis. These events may involve, to varying degrees, alterations in SIRT1 and its associated targets. In the present review, we describe SIRT1-related signaling pathways and their association with BPD. Our intention is to provide new insights into the molecular mechanisms that regulate BPD and identify potential therapeutic targets for this debilitating condition.
Collapse
Affiliation(s)
- Kun Yang
- Department of Newborn Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Wenbin Dong
- Department of Newborn Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| |
Collapse
|
4
|
Nrf2/Keap1/ARE Signaling Mediated an Antioxidative Protection of Human Placental Mesenchymal Stem Cells of Fetal Origin in Alveolar Epithelial Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:2654910. [PMID: 31217836 PMCID: PMC6537011 DOI: 10.1155/2019/2654910] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 04/09/2019] [Accepted: 04/24/2019] [Indexed: 12/19/2022]
Abstract
The oxidative stresses are a major insult in pulmonary injury such as acute lung injury (ALI) and acute respiratory distress syndrome (ARDS), two clinical manifestations of acute respiratory failure with substantially high morbidity and mortality. Mesenchymal stem cells (MSCs) hold a promise in treatments of many human diseases, mainly owing to their capacities of immunoregulation and antioxidative activity. The strong immunoregulatory role of human placental MSCs of fetal origin (hfPMSCs) has been previously demonstrated; their antioxidant activity, however, has yet been interrogated. In this report, we examined the antioxidative activity of hfPMSCs by accessing the ability to scavenge oxidants and radicals and to protect alveolar epithelial cells from antioxidative injury using both a cell coculture model and a conditioned culture medium (CM) of hfPMSCs. Results showed a comparable antioxidative capacity of the CM with 100 μM of vitamin C (VC) in terms of the total antioxidant capacity (T-AOC), scavenging abilities of free radicals DPPH, hydroxyl radical (·OH), and superoxide anion radical (O2−), as well as activities of antioxidant enzymes of SOD and GSH-PX. Importantly, both of the CM alone and cocultures of hfPMSCs displayed a protection of A549 alveolar epithelial cells from oxidative injury of 600 μM hydrogen peroxide (H2O2) exposure, as determined in monolayer and transwell coculture models, respectively. Mechanistically, hfPMSCs and their CM could significantly reduce the apoptotic cell fraction of alveolar epithelial A549 cells exposed to H2O2, accompanied with an increased expression of antiapoptotic proteins Bcl-2, Mcl-1, Nrf-2, and HO-1 and decreased proapoptotic proteins Bax, caspase 3, and Keap1, in comparison with naïve controls. Furthermore, hfPMSCs-CM (passage 3) collected from cultures exposed an inhibition of the Nrf2/Keap1/ARE signaling pathway which led to a significant reduction in caspase 3 expression in A549 cells, although the addition of Nrf2 inhibitor ML385 had no effect on the antioxidative activity of hfPMSCs-CM. These data clearly suggested that hfPMSCs protected the H2O2-induced cell oxidative injury at least in part by regulating the Nrf2-Keap1-ARE signaling-mediated cell apoptosis. Our study thus provided a new insight into the antioxidative mechanism and novel functions of hfPMSCs as antioxidants in disease treatments, which is warranted for further investigations.
Collapse
|
5
|
Bai YX, Fang F, Jiang JL, Xu F. Extrinsic Calcitonin Gene-Related Peptide Inhibits Hyperoxia-Induced Alveolar Epithelial Type II Cells Apoptosis, Oxidative Stress, and Reactive Oxygen Species (ROS) Production by Enhancing Notch 1 and Homocysteine-Induced Endoplasmic Reticulum Protein (HERP) Expression. Med Sci Monit 2017; 23:5774-5782. [PMID: 29206808 PMCID: PMC5728081 DOI: 10.12659/msm.904549] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background Lung alveolar epithelial type II cells (AEC II) are the most important stem cells in lung tissues, which are critical for wound repair of bronchopulmonary dysplasia (BPD). This study investigated the effects of calcitonin gene-related peptide (CGRP) on AEC II cells exposed to hyperoxia. Material/Methods Neonatal rat AEC II cells were isolated and identified by detecting surfactant protein C (SP-C). Three small interfering RNAs targeting Notch 1 were synthesized and transfected into AEC II. A hyperoxia-exposed AEC II cell injury model was established and was divided into 8 groups. MDA levels and SOD activity were examined using lipid peroxidation assay kits. Apoptosis and reactive oxygen species (ROS) production were evaluated using flow cytometry. Notch 1 mRNA expression was examined using RT-PCR. Homocysteine-induced endoplasmic reticulum protein (HERP) was examined using Western blot analysis. Results CGRP treatment significantly enhanced MDA levels and decreased SOD activity compared to hyperoxia-treated AEC II cells (P<0.05). CGRP treatment significantly inhibited hyperoxia-induced AEC II cell apoptosis, and significantly suppressed hyperoxia-induced ROS production compared to hyperoxia-treated AEC II cells (P<0.05) either undergoing γ secretase inhibitor or Notch RNA interference. CGRP significantly triggered Notch 1 mRNA expression and significantly enhanced HERP expression compared to hyperoxia-treated AEC II cells (P<0.05) either undergoing γ secretase inhibitor or Notch RNA interference. Conclusions In AEC II cells, extrinsic peptide CGRP suppressed hyperoxia-induced apoptosis, oxidative stress, and ROS production, which may be triggered by Notch 1 and HERP signaling pathway.
Collapse
Affiliation(s)
- Yu-Xin Bai
- Department of Critical Care, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China (mainland).,Chongqing Key Laboratory of Pediatrics, Chongqing, China (mainland)
| | - Fang Fang
- Department of Critical Care, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China (mainland).,Chongqing Key Laboratory of Pediatrics, Chongqing, China (mainland)
| | - Jia-Ling Jiang
- Department of Pediatrics, Inner Mongolia People's Hospital, Hohhot, Inner Mongolia, China (mainland)
| | - Feng Xu
- Department of Critical Care, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China (mainland).,Chongqing Key Laboratory of Pediatrics, Chongqing, China (mainland)
| |
Collapse
|
6
|
Jin X, Xu Z, Cao J, Yan R, Xu R, Ran R, Ma Y, Cai W, Fan R, Zhang Y, Zhou X, Li Y. HO-1/EBP interaction alleviates cholesterol-induced hypoxia through the activation of the AKT and Nrf2/mTOR pathways and inhibition of carbohydrate metabolism in cardiomyocytes. Int J Mol Med 2017; 39:1409-1420. [PMID: 28487965 PMCID: PMC5428940 DOI: 10.3892/ijmm.2017.2979] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 05/03/2017] [Indexed: 02/06/2023] Open
Abstract
Heme oxygenase-1 (HO-1) is an inducible and cytoprotective enzyme that provides a defense against oxidant damage. The present study screened 137 HO-1/interacting proteins using a profound co-immunoprecipitation (Co-IP) coupled with proteomics, and profiled the global HO-1 interactome network, including oxidative phosphorylation, endoplasmic reticulum and transport vesicle functions. Among these molecules, we observed that a novel interactor, emopamil-binding protein (EBP), is closely related to the cholesterol metabolism process. This study demonstrated that cholesterol promotes excessive oxidative stress and alters the energy metabolism in cardiomyocytes, further triggering numerous cardiovascular diseases. We observed that cholesterol caused the overexpression of EBP and HO-1 by the activation of AKT and Nrf2/mTOR pathways. In addition, HO-1 and EBP performed a myocardial protective function. The overexpression of HO-1 alleviated the cholesterol-induced excessive oxidative stress status by inhibition of the carbohydrate metabolism. Notably, we also confirmed that the loss of partial HO-1 activity aggravated the oxidative damage and cardiac systolic function induced by a high-fat diet in HO-1 heterozygous (HO-1+/−) mice. These findings indicate that the HO-1/EBP interaction plays a protective role in alleviating the dysfunction of oxidative stress and cardiac systolic function induced by cholesterol stimulation.
Collapse
Affiliation(s)
- Xiaohan Jin
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, P.R. China
| | - Zhongwei Xu
- Central Laboratory, Logistics University of the Chinese People's Armed Police Force, Tianjin 300309, P.R. China
| | - Jin Cao
- Department of Basic Medicine, Logistics University of the Chinese People's Armed Police Force, Tianjin 300309, P.R. China
| | - Rui Yan
- Central Laboratory, Logistics University of the Chinese People's Armed Police Force, Tianjin 300309, P.R. China
| | - Ruicheng Xu
- Department of Basic Medicine, Logistics University of the Chinese People's Armed Police Force, Tianjin 300309, P.R. China
| | - Ruiqiong Ran
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, P.R. China
| | - Yongqiang Ma
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, P.R. China
| | - Wei Cai
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, P.R. China
| | - Rong Fan
- Central Laboratory, Logistics University of the Chinese People's Armed Police Force, Tianjin 300309, P.R. China
| | - Yan Zhang
- Central Laboratory, Logistics University of the Chinese People's Armed Police Force, Tianjin 300309, P.R. China
| | - Xin Zhou
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, P.R. China
| | - Yuming Li
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, P.R. China
| |
Collapse
|
7
|
Sclareol ameliorate lipopolysaccharide-induced acute lung injury through inhibition of MAPK and induction of HO-1 signaling. Int Immunopharmacol 2017; 44:16-25. [DOI: 10.1016/j.intimp.2016.12.026] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 12/20/2016] [Accepted: 12/21/2016] [Indexed: 11/23/2022]
|