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Chen S, Zhu H, Lin L, Lu L, Chen L, Zeng L, Yue W, Kong X, Zhang H. Apelin-13 improves pulmonary epithelial barrier function in a mouse model of LPS-induced acute lung injury by inhibiting Chk1-mediated DNA damage. Biochem Pharmacol 2024; 226:116297. [PMID: 38801925 DOI: 10.1016/j.bcp.2024.116297] [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: 10/22/2023] [Revised: 04/10/2024] [Accepted: 05/15/2024] [Indexed: 05/29/2024]
Abstract
Apelin-13, a type of active peptide, can alleviate lipopolysaccharide (LPS)-induced acute lung injury (ALI). However, the specific mechanism is unclear. Cell cycle checkpoint kinase 1 (Chk1) plays an important role in DNA damage. Here, we investigated the regulatory effect of Apelin on Chk1 in ALI. Chk1-knockout and -overexpression mice were used to explore the role of Chk1 in LPS-induced ALI mice treated with or without Apelin-13. In addition, A549 cells were also treated with LPS to establish a cell model. Chk1 knockdown inhibited the destruction of alveolar structure, the damage of lung epithelial barrier function, and DNA damage in the ALI mouse model. Conversely, Chk1 overexpression had the opposite effect. Furthermore, Apelin-13 reduced Chk1 expression and DNA damage to improve the impaired lung epithelial barrier function in the ALI model. However, the high expression of Chk1 attenuated the protective effect of Apelin-13 on ALI. Notably, Apelin-13 promoted Chk1 degradation through autophagy to regulate DNA damage in LPS-treated A549 cells. In summary, Apelin-13 regulates the expression of Chk1 by promoting autophagy, thereby inhibiting epithelial DNA damage and repairing epithelial barrier function.
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Affiliation(s)
- Siyue Chen
- Department of Children's Respiration disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325000, Zhejiang, PR China; School of Basic Medical Sciences, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang 315302, PR China
| | - Huihui Zhu
- Department of Children's Respiration disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325000, Zhejiang, PR China
| | - Lidan Lin
- School of Basic Medical Sciences, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang 315302, PR China
| | - Liling Lu
- Children's Hospital, Zhejiang University School of Medicine, Zhejiang 310000, PR China
| | - Lin Chen
- Department of Children's Respiration disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325000, Zhejiang, PR China; School of Basic Medical Sciences, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang 315302, PR China
| | - Luyao Zeng
- Department of Children's Respiration disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325000, Zhejiang, PR China
| | - Wei Yue
- Department of Children's Respiration disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325000, Zhejiang, PR China
| | - Xiaoxia Kong
- School of Basic Medical Sciences, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang 315302, PR China.
| | - Hailin Zhang
- Department of Children's Respiration disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325000, Zhejiang, PR China.
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Fu H, Zhang T, Huang R, Yang Z, Liu C, Li M, Fang F, Xu F. Calcitonin gene-related peptide protects type II alveolar epithelial cells from hyperoxia-induced DNA damage and cell death. Exp Ther Med 2017; 13:1279-1284. [PMID: 28413467 PMCID: PMC5377287 DOI: 10.3892/etm.2017.4132] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 11/25/2016] [Indexed: 11/06/2022] Open
Abstract
Hyperoxia therapy for acute lung injury (ALI) may unexpectedly lead to reactive oxygen species (ROS) production and cause additional ALI. Calcitonin gene-related peptide (CGRP) is a 37 amino acid neuropeptide that regulates inflammasome activation. However, the role of CGRP in DNA damage during hyperoxia is unclear. Therefore, the aim of the present study was to investigate the effects of CGRP on DNA damage and the cell death of alveolar epithelial type II cells (AEC II) exposed to 60% oxygen. AEC II were isolated from 19–20 gestational day fetal rat lungs and were exposed to air or to 60% oxygen during treatment with CGRP or the specific CGRP receptor antagonist CGRP8–37. The cells were evaluated using immunofluorescence to examine surfactant protein-C and ROS levels were measured by probing with 2′,7′-dichlorofluorescin diacetate. The apoptosis rate and cell cycle of AEC II were analyzed by flow cytometry, and apoptosis was determined by western blotting analysis of activated caspase 3. The DNA damage was confirmed with immunofluorescence of H2AX via high-content analysis. The ROS levels, apoptotic cell number and the expression of γH2AX were markedly increased in the hyperoxia group compared with those in the air group. Concordantly, ROS levels, apoptotic cell number and the expression of γH2AX were significantly lower with a significant arrest of S and G2/M phases in the CGRP/O2 group than in the hyperoxia or CGRP8–37/O2 groups. CGRP was concluded to protect lung epithelium cells against hyperoxic insult, and upregulation of CGRP may be a possible novel therapeutic target to treat hyperoxic lung injury.
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Affiliation(s)
- Hongmin Fu
- Department of Pediatric Internal Medicine, Children's Hospital, Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Tiesong Zhang
- Department of Pediatric Internal Medicine, Children's Hospital, Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Rongwei Huang
- Department of Pediatric Internal Medicine, Children's Hospital, Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Zhen Yang
- Department of Pediatric Internal Medicine, Children's Hospital, Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Chunming Liu
- Department of Pediatric Internal Medicine, Children's Hospital, Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Ming Li
- Department of Pediatric Internal Medicine, Children's Hospital, Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Fang Fang
- Pediatric Intensive Care Unit, Children's Hospital, Chongqing Medical University, Chongqing 400014, P.R. China
| | - Feng Xu
- Pediatric Intensive Care Unit, Children's Hospital, Chongqing Medical University, Chongqing 400014, P.R. China
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Abstract
Oxygen is the basic molecule which supports life and it truly is "god's gift to life." Despite its immense importance, research on "oxygen biology" has never received the light of the day and has been limited to physiological and biochemical studies. It seems that in modern day biology, oxygen research is summarized in one word "hypoxia." Scientists have focused on hypoxia-induced transcriptomics and molecular-cellular alterations exclusively in disease models. Interestingly, the potential of oxygen to control the basic principles of biology like homeostatic maintenance, transcription, replication, and protein folding among many others, at the molecular level, has been completely ignored. Here, we present a perspective on the crucial role played by oxygen in regulation of basic biological phenomena. Our conclusion highlights the importance of establishing novel research areas like oxygen biology, as there is great potential in this field for basic science discoveries and clinical benefits to the society.
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Meiners S, Ballweg K. Proteostasis in pediatric pulmonary pathology. Mol Cell Pediatr 2014; 1:11. [PMID: 26567105 PMCID: PMC4530569 DOI: 10.1186/s40348-014-0011-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 11/19/2014] [Indexed: 02/07/2023] Open
Abstract
Protein homeostasis describes the tight supervision of protein synthesis, correct protein maturation and folding, as well as the timely disposal of unwanted and damaged proteins by the ubiquitin-proteasome pathway or the lysosome-autophagy route. The cellular processes involved in preservation of protein homeostasis are collectively called proteostasis. Dysregulation of proteostasis is an emerging common pathomechanism for chronic lung diseases in the adult and aged patient. There is also rising evidence that impairment of protein homeostasis contributes to early sporadic disease onset in pediatric lung diseases beyond the well-known hereditary proteostasis disorders such as cystic fibrosis and alpha-1 antitrypsin (AAT) deficiency. Identifying the pathways that contribute to impaired proteostasis will provide new avenues for therapeutic interference with the pathogenesis of chronic lung diseases in the young and adult. Here, we introduce the concept of proteostasis and summarize available evidence on dysregulation of proteostasis pathways in pediatric and adult chronic lung diseases.
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Affiliation(s)
- Silke Meiners
- Comprehensive Pneumology Center (CPC), Member of the German Center for Lung Research (DZL), University Hospital, Ludwig-Maximilians-Universität, Asklepios Klinik Gauting und Helmholtz Zentrum München, Max-Lebsche-Platz 31, 81377, Munich, Germany.
| | - Korbinian Ballweg
- Comprehensive Pneumology Center (CPC), Member of the German Center for Lung Research (DZL), University Hospital, Ludwig-Maximilians-Universität, Asklepios Klinik Gauting und Helmholtz Zentrum München, Max-Lebsche-Platz 31, 81377, Munich, Germany.
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O'Reilly M, Thébaud B. Animal models of bronchopulmonary dysplasia. The term rat models. Am J Physiol Lung Cell Mol Physiol 2014; 307:L948-58. [PMID: 25305248 DOI: 10.1152/ajplung.00160.2014] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD) is the chronic lung disease of prematurity that affects very preterm infants. Although advances in perinatal care have enabled the survival of infants born as early as 23-24 wk of gestation, the challenge of promoting lung growth while protecting the ever more immature lung from injury is now bigger. Consequently, BPD remains one of the most common complications of extreme prematurity and still lacks specific treatments. Progress in our understanding of BPD and the potential of developing therapeutic strategies have arisen from large (baboons, sheep, and pigs) and small (rabbits, rats, and mice) animal models. This review focuses specifically on the use of the rat to model BPD and summarizes how the model is used in various research studies and the advantages and limitations of this particular model, and it highlights recent therapeutic advances in BPD by using this rat model.
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Affiliation(s)
- Megan O'Reilly
- Department of Pediatrics and Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada; and
| | - Bernard Thébaud
- Ottawa Hospital Research Institute, Sprott Center for Stem Cell Research, Regenerative Medicine Program and Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
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Mohamed BA, Barakat AZ, Held T, Elkenani M, Mühlfeld C, Männer J, Adham IM. Respiratory Distress and Early Neonatal Lethality inHspa4l/Hspa4Double-Mutant Mice. Am J Respir Cell Mol Biol 2014; 50:817-24. [DOI: 10.1165/rcmb.2013-0132oc] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Ryu AR, Lee MY. Proteomic profiling of differentially expressed proteins after exposure to asbestos. BIOCHIP JOURNAL 2013. [DOI: 10.1007/s13206-013-7304-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Tolle LB, Standiford TJ. Danger-associated molecular patterns (DAMPs) in acute lung injury. J Pathol 2013; 229:145-56. [PMID: 23097158 DOI: 10.1002/path.4124] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 10/02/2012] [Accepted: 10/03/2012] [Indexed: 12/22/2022]
Abstract
Danger-associated molecular patterns (DAMPs) are host-derived molecules that can function to regulate the activation of pathogen recognition receptors (PRRs). These molecules play a critical role in modulating the lung injury response. DAMPs originate from multiple sources, including injured and dying cells, the extracellular matrix, or exist as immunomodulatory proteins within the airspace and interstitium. DAMPs can function as either toll-like receptor (TLR) agonists or antagonists, and can modulate both TLR and nod-like receptor (NLR) signalling cascades. Collectively, this diverse group of molecules may represent important therapeutic targets in the prevention and/or treatment of acute lung injury (ALI) and its more severe form, acute respiratory distress syndrome (ARDS).
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Affiliation(s)
- Leslie B Tolle
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, MI, USA
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Korfei M, Schmitt S, Ruppert C, Henneke I, Markart P, Loeh B, Mahavadi P, Wygrecka M, Klepetko W, Fink L, Bonniaud P, Preissner KT, Lochnit G, Schaefer L, Seeger W, Guenther A. Comparative proteomic analysis of lung tissue from patients with idiopathic pulmonary fibrosis (IPF) and lung transplant donor lungs. J Proteome Res 2011; 10:2185-205. [PMID: 21319792 DOI: 10.1021/pr1009355] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive and fatal disease for which no effective therapy exists to date. To identify the molecular mechanisms underlying IPF, we performed comparative proteome analysis of lung tissue from patients with sporadic IPF (n = 14) and human donor lungs (controls, n = 10) using two-dimensional gel electrophoresis and MALDI-TOF-MS. Eighty-nine differentially expressed proteins were identified, from which 51 were up-regulated and 38 down-regulated in IPF. Increased expression of markers for the unfolded protein response (UPR), heat-shock proteins, and DNA damage stress markers indicated a chronic cell stress-response in IPF lungs. By means of immunohistochemistry, induction of UPR markers was encountered in type-II alveolar epithelial cells of IPF but not of control lungs. In contrast, up-regulation of heat-shock protein 27 (Hsp27) was exclusively observed in proliferating bronchiolar basal cells and associated with aberrant re-epithelialization at the bronchiolo-alveolar junctions. Among the down-regulated proteins in IPF were antioxidants, members of the annexin family, and structural epithelial proteins. In summary, our results indicate that IPF is characterized by epithelial cell injury, apoptosis, and aberrant epithelial proliferation.
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Affiliation(s)
- Martina Korfei
- University of Giessen Lung Center, Department of Internal Medicine II, Klinikstrasse 36, Justus-Liebig-University Giessen, Germany
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Kim M, Park SW, Kim M, Chen SWC, Gerthoffer WT, D'Agati VD, Lee HT. Selective renal overexpression of human heat shock protein 27 reduces renal ischemia-reperfusion injury in mice. Am J Physiol Renal Physiol 2010; 299:F347-58. [PMID: 20484296 DOI: 10.1152/ajprenal.00194.2010] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
We have previously shown that exogenous and endogenous A(1) adenosine receptor (A(1)AR) activation protected against renal ischemia-reperfusion (IR) injury in mice by induction and phosphorylation of heat shock protein 27 (HSP27). With global overexpression of HSP27 in mice, however, there was a paradoxical increase in systemic inflammation with increased renal injury after an ischemic insult due to increased NK1.1 cytotoxicity. In this study, we hypothesized that selective renal expression of HSP27 in mice would improve renal function and reduce injury after IR. Mice were subjected to renal IR injury 2 days after intrarenal injection of saline or a lentiviral construct encoding enhanced green fluorescent protein (EGFP) or human HSP27 coexpressing EGFP (EGFP-huHSP27). Mice with kidney-specific reconstitution of huHSP27 had significantly lower plasma creatinine, renal necrosis, apoptosis, and inflammation as demonstrated by decreased proinflammatory cytokine mRNA induction and neutrophil infiltration. In addition, there was better preservation of the proximal tubule epithelial filamentous (F)-actin cytoskeleton in the huHSP27-reconstituted groups than in the control groups. Furthermore, huHSP27 overexpression led to increased colocalization with F-actin in renal proximal tubules. Taken together, these findings have important clinical implications, as they imply that kidney-specific expression of HSP27 through lentiviral delivery is a viable therapeutic option in attenuating the effects of renal IR.
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Affiliation(s)
- Minjae Kim
- Departments of Anesthesiology, College of Physicians and Surgeons of Columbia University, New York, New York 10032-3784, USA
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