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Lv S, Li Y, Li X, Zhu L, Zhu Y, Guo C, Li Y. Silica nanoparticles triggered epithelial ferroptosis via miR-21-5p/GCLM signaling to contribute to fibrogenesis in the lungs. Chem Biol Interact 2024; 399:111121. [PMID: 38944326 DOI: 10.1016/j.cbi.2024.111121] [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: 05/05/2024] [Revised: 06/24/2024] [Accepted: 06/27/2024] [Indexed: 07/01/2024]
Abstract
The toxicity of silica nanoparticles (SiNPs) to lung is known. We previously demonstrated that exposure to SiNPs promoted pulmonary impairments, but the precise pathogenesis remains elucidated. Ferroptosis has now been identified as a unique form of oxidative cell death, but whether it participated in SiNPs-induced lung injury remains unclear. In this work, we established a rat model with sub-chronic inhalation exposure of SiNPs via intratracheal instillation, and conducted histopathological examination, iron detection, and ferroptosis-related lipid peroxidation and protein assays. Moreover, we evaluated the effect of SiNPs on epithelial ferroptosis, possible mechanisms using in vitro-cultured human bronchial epithelial cells (16HBE), and also assessed the ensuing impact on fibroblast activation for fibrogenesis. Consequently, fibrotic lesions occurred in the rat lungs, concomitantly by enhanced lipid peroxidation, iron overload, and ferroptosis. Consistently, the in vitro data showed SiNPs triggered oxidative stress and caused the accumulation of lipid peroxides, resulting in ferroptosis. Importantly, the mechanistic investigation revealed miR-21-5p as a key player in the epithelial ferroptotic process induced by SiNPs via targeting GCLM for GSH depletion. Of note, ferrostatin-1 could greatly suppress ferroptosis and alleviate epithelial injury and ensuing fibroblast activation by SiNPs. In conclusion, our findings first revealed SiNPs triggered epithelial ferroptosis through miR-21-5p/GCLM signaling and thereby promoted fibroblast activation for fibrotic lesions, and highlighted the therapeutic potential of inhibiting ferroptosis against lung impairments upon SiNPs exposure.
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Affiliation(s)
- Songqing Lv
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China; Beijing Key Laboratory of Mental Disorders, National Clinical Research Center for Mental Disorders & National Center for Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, 100088, China
| | - Yan Li
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing, 100069, China
| | - Xueyan Li
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing, 100069, China
| | - Lingnan Zhu
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing, 100069, China
| | - Yurou Zhu
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
| | - Caixia Guo
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing, 100069, China.
| | - Yanbo Li
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China.
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2
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Rao T, Zhou Y, Chen C, Chen J, Zhang J, Lin W, Jia D. Recent progress in neonatal hyperoxic lung injury. Pediatr Pulmonol 2024. [PMID: 38742254 DOI: 10.1002/ppul.27062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/28/2024] [Accepted: 05/04/2024] [Indexed: 05/16/2024]
Abstract
With the progress in neonatal intensive care, there has been an increase in the survival rates of premature infants. However, this has also led to an increased incidence of neonatal hyperoxia lung injury and bronchopulmonary dysplasia (BPD), whose pathogenesis is believed to be influenced by various prenatal and postnatal factors, although the exact mechanisms remain unclear. Recent studies suggest that multiple mechanisms might be involved in neonatal hyperoxic lung injury and BPD, with sex also possibly playing an important role, and numerous drugs have been proposed and shown promise for improving the treatment outcomes of hyperoxic lung injury. Therefore, this paper aims to analyze and summarize sex differences in neonatal hyperoxic lung injury, potential pathogenesis and treatment progress to provide new ideas for basic and clinical research in this field.
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Affiliation(s)
- Tian Rao
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yiyang Zhou
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Chizhang Chen
- Department of Clinical Medicine, Chinese Medicine Hospital of Pingyang, Wenzhou, Zhejiang, China
| | - Jiayi Chen
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jie Zhang
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Wei Lin
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Danyun Jia
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, Zhejiang, China
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Bailey-Downs LC, Sherlock LG, Crossley MN, Rivera Negron A, Pierce PT, Wang S, Zhong H, Carter C, Burge K, Eckert JV, Rogers LK, Vitiello PF, Tipple TE. Selenium Deficiency Exacerbates Hyperoxia-Induced Lung Injury in Newborn C3H/HeN Mice. Antioxidants (Basel) 2024; 13:391. [PMID: 38671839 PMCID: PMC11047402 DOI: 10.3390/antiox13040391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/09/2024] [Accepted: 03/13/2024] [Indexed: 04/28/2024] Open
Abstract
Extremely preterm infants are often treated with supraphysiological oxygen, which contributes to the development of bronchopulmonary dysplasia (BPD). These same infants exhibit compromised antioxidant capacities due in part to selenium (Se) deficiency. Se is essential for basal and inducible antioxidant responses. The present study utilized a perinatal Se deficiency (SeD) mouse model to identify the combined effects of newborn hyperoxia exposure and SeD on alveolarization and antioxidant responses, including the identification of affected developmental pathways. Se-sufficient (SeS) and SeD C3H/HeN breeding pairs were generated, and pups were exposed to room air or 85% O2 from birth to 14 d. Survival, antioxidant protein expression, and RNA seq analyses were performed. Greater than 40% mortality was observed in hyperoxia-exposed SeD pups. Surviving SeD pups had greater lung growth deficits than hyperoxia-exposed SeS pups. Gpx2 and 4 protein and Gpx activity were significantly decreased in SeD pups. Nrf2-regulated proteins, Nqo1 and Gclc were increased in SeD pups exposed to hyperoxia. RNA seq revealed significant decreases in the Wnt/β-catenin and Notch pathways. Se is a biologically relevant modulator of perinatal lung development and antioxidant responses, especially in the context of hyperoxia exposure. The RNA seq analyses suggest pathways essential for normal lung development are dysregulated by Se deficiency.
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Affiliation(s)
- Lora C. Bailey-Downs
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Laura G. Sherlock
- University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Michaela N. Crossley
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Aristides Rivera Negron
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Paul T. Pierce
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Shirley Wang
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Hua Zhong
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Cynthia Carter
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Kathryn Burge
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Jeffrey V. Eckert
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Lynette K. Rogers
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Peter F. Vitiello
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
| | - Trent E. Tipple
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (L.C.B.-D.); (S.W.); (H.Z.); (C.C.); (K.B.); (L.K.R.); (P.F.V.)
- Oklahoma Children’s Hospital OU Health, Oklahoma City, OK 73104, USA
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Haga M, Nagano N, Ozawa J, Tanaka K, Miyahara N, Fujimoto T, Ishii K, Namba F. The serum thioredoxin-1 levels are not associated with bronchopulmonary dysplasia and retinopathy of prematurity. Pediatr Res 2024:10.1038/s41390-024-03078-7. [PMID: 38365875 DOI: 10.1038/s41390-024-03078-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/30/2023] [Accepted: 01/21/2024] [Indexed: 02/18/2024]
Abstract
BACKGROUND We hypothesized that the serum TRX-1 in extremely preterm infants (EPIs) after birth was associated with the development of severe bronchopulmonary dysplasia (BPD) and retinopathy of prematurity (ROP). METHODS This single-centered retrospective study enrolled EPIs treated at our institution. Serum TRX-1 concentrations of the residual samples taken on admission, day 10-20 of life, and 36-40 weeks of postmenstrual age (PMA) were measured with an enzyme-linked immunosorbent assay. RESULTS The serum TRX-1 levels on admission were not different between the severe BPD (n = 46) and non-severe BPD groups (n = 67): [median (interquartile range) 147 (73.0-231) vs. 164 (80.5-248) ng/mL] (P = 0.57). These had no significant difference between the severe ROP (n = 47) and non-severe ROP groups (n = 66): [164 (71.3-237) vs. 150 (80.9-250) ng/mL] (P = 0.93). The TRX-1 levels at 10-20 days of life and 36-40 weeks of PMA also had no association with the development of severe BPD and ROP. CONCLUSION The serum TRX-1 levels after birth are not predictive of severe BPD and ROP. IMPACT Serum thioredoxin-1 levels in extremely preterm infants on the day of birth are lower than those in term or near-term infants hospitalized for transient tachypnea of the newborn. In extremely preterm infants, the serum thioredoxin-1 levels on the day of birth, at 10-20 days of life, and at postmenstrual age of 36-40 weeks were not associated with severe bronchopulmonary dysplasia and retinopathy of prematurity. The thioredoxin system is under development in extremely preterm infants; however, the serum thioredoxin-1 level is not predictive for severe bronchopulmonary dysplasia and retinopathy of prematurity.
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Affiliation(s)
- Mitsuhiro Haga
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan.
| | - Nobuhiko Nagano
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - Junichi Ozawa
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Kosuke Tanaka
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Naoyuki Miyahara
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Takeshi Fujimoto
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Kuniya Ishii
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Fumihiko Namba
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
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Lu N, Wei J, Gong X, Tang X, Zhang X, Xiang W, Liu S, Luo C, Wang X. Preventive Effect of Arctium lappa Polysaccharides on Acute Lung Injury through Anti-Inflammatory and Antioxidant Activities. Nutrients 2023; 15:4946. [PMID: 38068804 PMCID: PMC10708090 DOI: 10.3390/nu15234946] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/15/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
The objective of this study was to investigate the preventive effects of polysaccharides extracted from the roots of Arctium lappa (ALP) against acute lung injury (ALI) models induced by lipopolysaccharide (LPS). The polysaccharides were extracted and characterized, and their anti-inflammatory and antioxidant capacities were assessed. The findings demonstrated that ALP could mitigate the infiltration of inflammatory cells and reduce alveolar collapse in LPS-induced ALI in mice. The expression levels of the pro-inflammatory factor TNF-α decreased, while the anti-inflammatory factor IL-10 increased. Furthermore, the administration of ALP improved the activities of lung antioxidant enzymes, including SOD, GSH, and CAT, and lowered MDA levels. These results suggest that ALP exhibits a preventive effect on ALI and has potential as an alternative treatment for lung injury.
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Affiliation(s)
- Naiyan Lu
- Department of Pulmonary and Critical Care Medicine, Jiangnan University Medical Center, Jiangnan University, Wuxi 214126, China; (N.L.); (X.G.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214126, China; (J.W.); (X.T.); (X.Z.)
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214126, China
| | - Jiayi Wei
- School of Food Science and Technology, Jiangnan University, Wuxi 214126, China; (J.W.); (X.T.); (X.Z.)
| | - Xuelei Gong
- Department of Pulmonary and Critical Care Medicine, Jiangnan University Medical Center, Jiangnan University, Wuxi 214126, China; (N.L.); (X.G.)
| | - Xue Tang
- School of Food Science and Technology, Jiangnan University, Wuxi 214126, China; (J.W.); (X.T.); (X.Z.)
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214126, China
| | - Xuan Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi 214126, China; (J.W.); (X.T.); (X.Z.)
| | - Wen Xiang
- School of Medicine, Nankai University, Tianjin 300350, China;
| | - Samuel Liu
- Shenzhen Buddy Technology Development Co., Ltd., Shenzhen 518000, China; (S.L.); (C.L.)
| | - Cherry Luo
- Shenzhen Buddy Technology Development Co., Ltd., Shenzhen 518000, China; (S.L.); (C.L.)
| | - Xun Wang
- Department of Pulmonary and Critical Care Medicine, Jiangnan University Medical Center, Jiangnan University, Wuxi 214126, China; (N.L.); (X.G.)
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Sherlock LG, McCarthy WC, Grayck MR, Solar M, Hernandez A, Zheng L, Delaney C, Tipple TE, Wright CJ, Nozik ES. Neonatal Selenium Deficiency Decreases Selenoproteins in the Lung and Impairs Pulmonary Alveolar Development. Antioxidants (Basel) 2022; 11:2417. [PMID: 36552625 PMCID: PMC9774937 DOI: 10.3390/antiox11122417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/16/2022] [Accepted: 11/22/2022] [Indexed: 12/13/2022] Open
Abstract
Decreased selenium (Se) levels during childhood and infancy are associated with worse respiratory health. Se is biologically active after incorporation into Se-containing antioxidant enzymes (AOE) and proteins. It is unknown how decreased maternal Se during pregnancy and lactation impacts neonatal pulmonary selenoproteins, growth, and lung development. Using a model of neonatal Se deficiency that limits Se intake to the dam during pregnancy and lactation, we evaluated which neonatal pulmonary selenoproteins are decreased in both the saccular (postnatal day 0, P0) and early alveolar (postnatal day 7, P7) stages of lung development. We found that Se deficient (SeD) pups weigh less and exhibit impaired alveolar development compared to Se sufficient (SeS) pups at P7. The activity levels of glutathione peroxidase (GPx) and thioredoxin reductase (Txnrd) were decreased at P0 and P7 in SeD lungs compared to SeS lungs. Protein content of GPx1, GPx3 and Txnrd1 were decreased in SeD lungs at P0 and P7, whereas Txnrd2 content was unaltered compared to SeS controls. The expression of NRF-2 dependent genes and several non-Se containing AOE were similar between SeS and SeD lungs. SeD lungs exhibited a decrease in selenoprotein N, an endoplasmic reticulum protein implicated in alveolar development, at both time points. We conclude that exposure to Se deficiency during pregnancy and lactation impairs weight gain and lung growth in offspring. Our data identify multiple selenoproteins in the neonatal lung that are vulnerable to decreased Se intake, which may impact oxidative stress and cell signaling under physiologic conditions as well as after oxidative stressors.
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Affiliation(s)
- Laura G. Sherlock
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - William C. McCarthy
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Maya R. Grayck
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Mack Solar
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Andres Hernandez
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Lijun Zheng
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Cassidy Delaney
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Trent E. Tipple
- Department of Pediatrics, University of Oklahoma College of Medicine, Oklahoma City, OK 73104, USA
| | - Clyde J. Wright
- Perinatal Research Center, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Eva S. Nozik
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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7
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Yang X, Jiang S, Deng X, Luo Z, Chen A, Yu R. Effects of Antioxidants in Human Milk on Bronchopulmonary Dysplasia Prevention and Treatment: A Review. Front Nutr 2022; 9:924036. [PMID: 35923207 PMCID: PMC9340220 DOI: 10.3389/fnut.2022.924036] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/21/2022] [Indexed: 12/20/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a severe chronic lung illness that affects neonates, particularly premature infants. It has far-reaching consequences for infant health and their families due to intractable short- and long-term repercussions. Premature infant survival and long-term quality of life are severely harmed by BPD, which is characterized by alveolarization arrest and hypoplasia of pulmonary microvascular cells. BPD can be caused by various factors, with oxidative stress (OS) being the most common. Premature infants frequently require breathing support, which results in a hyperoxic environment in the developing lung and obstructs lung growth. OS can damage the lungs of infants by inducing cell death, inhibiting alveolarization, inducing inflammation, and impairing pulmonary angiogenesis. Therefore, antioxidant therapy for BPD relieves OS and lung injury in preterm newborns. Many antioxidants have been found in human milk, including superoxide dismutase, glutathione peroxidase, glutathione, vitamins, melatonin, short-chain fatty acids, and phytochemicals. Human milk oligosaccharides, milk fat globule membrane, and lactoferrin, all unique to human milk, also have antioxidant properties. Hence, human milk may help prevent OS injury and improve BPD prognosis in premature infants. In this review, we explored the role of OS in the pathophysiology of BPD and related signaling pathways. Furthermore, we examined antioxidants in human milk and how they could play a role in BPD to understand whether human milk could prevent and treat BPD.
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Affiliation(s)
- Xianpeng Yang
- Department of Neonatology, Wuxi Maternity and Child Health Care Hospital, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Shanyu Jiang
- Department of Neonatology, Wuxi Maternity and Child Health Care Hospital, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Xianhui Deng
- Department of Neonatology, Wuxi Maternity and Child Health Care Hospital, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Zichen Luo
- Department of Neonatology, Wuxi Maternity and Child Health Care Hospital, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Ailing Chen
- Translational Medicine Laboratory, Research Institute for Reproductive Health and Genetic Diseases, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
- *Correspondence: Ailing Chen
| | - Renqiang Yu
- Department of Neonatology, Wuxi Maternity and Child Health Care Hospital, Wuxi School of Medicine, Jiangnan University, Wuxi, China
- Renqiang Yu
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8
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Carpenter EL, Wyant MB, Indra A, Ito S, Wakamatsu K, Merrill GF, Moos PJ, Cassidy PB, Leachman SA, Ganguli-Indra G, Indra AK. Thioredoxin Reductase 1 Modulates Pigmentation and Photobiology of Murine Melanocytes in vivo. J Invest Dermatol 2022; 142:1903-1911.e5. [PMID: 35031135 PMCID: PMC10771865 DOI: 10.1016/j.jid.2021.11.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/06/2021] [Accepted: 11/19/2021] [Indexed: 12/20/2022]
Abstract
Pigment-producing melanocytes overcome frequent oxidative stress in their physiological role of protecting the skin against the deleterious effects of solar UV irradiation. This is accomplished by the activity of several endogenous antioxidant systems, including the thioredoxin antioxidant system, in which thioredoxin reductase 1 (TR1) plays an important part. To determine whether TR1 contributes to the redox regulation of melanocyte homeostasis, we have generated a selective melanocytic Txnrd1-knockout mouse model (Txnrd1mel‒/‒), which exhibits a depigmentation phenotype consisting of variable amelanotic ventral spotting and reduced pigmentation on the extremities (tail tip, ears, and paws). The antioxidant role of TR1 was further probed in the presence of acute neonatal UVB irradiation, which stimulates melanocyte activation and introduces a spike in oxidative stress in the skin microenvironment. Interestingly, we observed a significant reduction in overall melanocyte count and proliferation in the absence of TR1. Furthermore, melanocytes exhibited an elevated level of UV-induced DNA damage in the form of 8-oxo-2'-deoxyguanosine after acute UVB treatment. We also saw an engagement of compensatory antioxidant mechanisms through increased nuclear localization of transcription factor NRF2. Altogether, these data indicate that melanocytic TR1 positively regulates melanocyte homeostasis and pigmentation during development and protects against UVB-induced DNA damage and oxidative stress.
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Affiliation(s)
- Evan L Carpenter
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, USA
| | - Mark B Wyant
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, USA
| | - Aaryan Indra
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, USA; Corvallis High School, Corvallis, Oregon, USA
| | - Shosuke Ito
- Institute for Melanin Chemistry, Fujita Health University, Toyoake, Aichi, Japan
| | - Kazumasa Wakamatsu
- Institute for Melanin Chemistry, Fujita Health University, Toyoake, Aichi, Japan
| | - Gary F Merrill
- Department of Biochemistry and Biophysics, College of Science, Oregon State University, Corvallis, Oregon, USA
| | - Philip J Moos
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, Utah, USA
| | - Pamela B Cassidy
- Department of Dermatology, Oregon Health & Science University, Portland, Oregon, USA; OHSU Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Sancy A Leachman
- Department of Dermatology, Oregon Health & Science University, Portland, Oregon, USA; OHSU Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Gitali Ganguli-Indra
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, USA; OHSU Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Arup K Indra
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, USA; Department of Biochemistry and Biophysics, College of Science, Oregon State University, Corvallis, Oregon, USA; Department of Dermatology, Oregon Health & Science University, Portland, Oregon, USA; OHSU Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA; Linus Pauling Institute, Oregon State University, Corvallis, Oregon, USA.
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9
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Kraus AC, De Miguel C. Hyperoxia and Acute Kidney Injury: A Tale of Oxygen and the Kidney. Semin Nephrol 2022; 42:151282. [PMID: 36404211 PMCID: PMC9825666 DOI: 10.1016/j.semnephrol.2022.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although oxygen supplementation is beneficial to support life in the clinic, excessive oxygen therapy also has been linked to damage to organs such as the lung or the eye. However, there is a lack of understanding of whether high oxygen therapy directly affects the kidney, leading to acute kidney injury, and what molecular mechanisms may be involved in this process. In this review, we revise our current understanding of the mechanisms by which hyperoxia leads to organ damage and highlight possible areas of investigation for the scientific community interested in novel mechanisms of kidney disease. Overall, we found a significant need for both animal and clinical studies evaluating the role of hyperoxia in inducing kidney damage. Thus, we urge the research community to further investigate oxygen therapy and its impact on kidney health with the goal of optimizing oxygen therapy guidelines and improving patient care.
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Affiliation(s)
- Abigayle C Kraus
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - Carmen De Miguel
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL.
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Auranofin-Mediated NRF2 Induction Attenuates Interleukin 1 Beta Expression in Alveolar Macrophages. Antioxidants (Basel) 2021; 10:antiox10050632. [PMID: 33919055 PMCID: PMC8143169 DOI: 10.3390/antiox10050632] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/01/2021] [Accepted: 04/12/2021] [Indexed: 01/11/2023] Open
Abstract
Background: Alveolar macrophages (AMs) are resident inflammatory cells in the lung that serve as early sentinels of infection or injury. We have identified thioredoxin reductase 1 inhibition by gold compounds increases activation of nuclear factor erythroid 2-related factor 2 (NRF2)-dependent pathways to attenuate inflammatory responses. The present studies utilized murine alveolar macrophages (MH-S) to test the hypothesis that the gold compound, auranofin (AFN), decreases interleukin (IL)-1β expression through NRF2-mediated interactions with nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathway genes and/or increases in glutathione synthesis. Methods: MH-S cells were treated with AFN and lipopolysaccharide (LPS) and analyzed at 6 and 24 h. The Il1b promoter was analyzed by chromatin immunoprecipitation for direct interaction with NRF2. Results: Expression of IL-1β, p-IκBα, p-p65 NF-kB, and NOD-, LRR-, and pyrin domain-containing protein 3 were elevated by LPS exposure, but only IL-1β expression was suppressed by AFN treatment. Both AFN and LPS treatments increased cellular glutathione levels, but attenuation of glutathione synthesis by buthionine sulfoximine (BSO) did not alter expression of Il-1β. Analysis revealed direct NRF2 binding to the Il1b promoter which was enhanced by AFN and inhibited the transcriptional activity of DNA polymerase II. Conclusions: Our data demonstrate that AFN-induced NRF2 activation directly suppresses IL-1β synthesis independent of NFκB and glutathione-mediated antioxidant mechanisms. NRF2 binding to the promoter region of IL1β directly inhibits transcription of the IL1β gene. Collectively, our research suggests that gold compounds elicit NRF2-dependent pulmonary protection by suppressing macrophage-mediated inflammation.
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11
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Shi Y, Yang W, Tang X, Yan Q, Cai X, Wu F. Keshan Disease: A Potentially Fatal Endemic Cardiomyopathy in Remote Mountains of China. Front Pediatr 2021; 9:576916. [PMID: 33768083 PMCID: PMC7985175 DOI: 10.3389/fped.2021.576916] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 01/25/2021] [Indexed: 12/16/2022] Open
Abstract
Keshan disease (KD) as an endemic, highly lethal cardiomyopathy, first reported in northeast China's Keshan County in 1935. The clinical manifestations of patients with KD include primarily congestive heart failure, acute heart failure, and cardiac arrhythmia. Even though some possible etiologies, such as viral infection, fungal infection, microelement deficiency, and malnutrition, have been reported, the exact causes of KD remain poorly known. The endemic areas where KD is found are remote and rural, and many are poor and mountainous places where people are the most socioeconomically disadvantaged in terms of housing, income, education, transportation, and utilization of health services. To date, KD is a huge burden to and severely restricts the economic development of the local residents and health systems of the endemic areas. Although efforts have been made by the government to control, treat, and interrupt disease transmission, the cure for or complete eradication of KD still requires global attention. For this reason, in this review, we systematically describe the etiological hypothesis, clinical manifestations, incidence characteristics, and treatment of KD, to facilitate the better understanding of and draw more attention to this non-representative cardiovascular disease, with the aim of accelerating its elimination.
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Affiliation(s)
- Ying Shi
- Department of Central Laboratory, Shenzhen Hospital, Beijing University of Chinese Medicine, Shenzhen, China
| | - Wei Yang
- Department of Physical Examination, Shenzhen Hospital, Beijing University of Chinese Medicine, Shenzhen, China
| | - Xianwen Tang
- Department of Cardiovascular Medicine, Shenzhen Hospital, Beijing University of Chinese Medicine, Shenzhen, China
| | - Quanhao Yan
- Department of Cardiovascular Medicine, Shenzhen Hospital, Beijing University of Chinese Medicine, Shenzhen, China
| | - Xiaojing Cai
- Department of Cardiovascular Medicine, Shenzhen Hospital, Beijing University of Chinese Medicine, Shenzhen, China
| | - Fenfang Wu
- Department of Central Laboratory, Shenzhen Hospital, Beijing University of Chinese Medicine, Shenzhen, China
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12
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Auranofin Attenuates Non-Alcoholic Fatty Liver Disease by Suppressing Lipid Accumulation and NLRP3 Inflammasome-Mediated Hepatic Inflammation In Vivo and In Vitro. Antioxidants (Basel) 2020; 9:antiox9111040. [PMID: 33114221 PMCID: PMC7690872 DOI: 10.3390/antiox9111040] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 02/06/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) causes liver dysfunction and is associated with obesity and type 2 diabetes. Chronic inflammation is associated not only with the development of NAFLD, but also with hepatic diseases, including steatohepatitis, cirrhosis, and hepatocellular carcinoma. Auranofin is a treatment for rheumatoid arthritis and has recently been reported to have potential effects against a variety of diseases, including inflammation, cancer, and viral infection. In this study, auranofin may be considered as a new treatment for the management of metabolic syndrome, as well as in the treatment of NAFLD through immunomodulation. To determine the effect of auranofin on NAFLD, C57BL/6 mice were randomly grouped, fed a regular diet or a high fat diet (HFD), and injected with normal saline or auranofin for 8 weeks. Auranofin significantly decreased the body weight, epididymal fat weight, serum aspartate aminotransferase (AST), and glucose, as well as the serum triglyceride, cholesterol, and low-density lipoprotein cholesterol levels as compared to the HFD group. We also observed that hepatic steatosis was increased in the HFD group and was suppressed by auranofin treatment. In addition, auranofin suppressed the expressions of interleukin (IL)-1β, IL-18, caspase-1, and the NOD-like receptor family pyrin domain containing 3 (NLRP3) in the liver tissue. Furthermore, the expression of NADPH oxidase 4 and peroxisome proliferator-activated receptor γ (PPARγ), which are a major source of oxidative stress and a regulator of adipogenesis, respectively, were also decreased by auranofin. In addition, primary mouse hepatocytes were incubated with lipopolysaccharide (LPS) and palmitic acid (PA) to induce lipid accumulation and hepatic inflammation for an in vitro model. Auranofin could significantly inhibit LPS- and PA-induced inflammatory activity including nitric oxide and NLRP3 inflammasome-mediated cytokines. The results of this study demonstrate that auranofin treatment inhibits the characteristics of NAFLD through the inhibition of NLRP3 inflammasome. Therefore, auranofin may have potential as a candidate for improving NAFLD symptoms.
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13
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Staples S, Wall SB, Li R, Tipple TE. Selenium-independent antioxidant and anti-inflammatory effects of thioredoxin reductase inhibition in alveolar macrophages. Life Sci 2020; 259:118285. [PMID: 32798556 DOI: 10.1016/j.lfs.2020.118285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 08/08/2020] [Accepted: 08/11/2020] [Indexed: 01/10/2023]
Abstract
AIMS Interleukin-1β (IL-1β) contributes to the development of bronchopulmonary dysplasia (BPD). Thioredoxin reductase-1 (Txnrd1) inhibition activates nuclear factor erythroid 2-related factor 2 (Nrf2)-dependent responses. Txnrd1 activity is selenium (Se) dependent and Se deficiency is common in prematurity. Auranofin (AFN), a Txnrd1 inhibitor, decreases IL-1β levels and increases Nrf2 activation in lipopolysaccharide (LPS) treated alveolar macrophages. In lung epithelia, AFN-induced Nrf2 activation is Se dependent. We tested the hypothesis that the effects of Txnrd1 inhibition in alveolar macrophages are Se dependent. MAIN METHODS To establish Se sufficient (Se+) and deficient (Se-) conditions, alveolar (MH-S) macrophages were cultured in 2.5% fetal bovine serum (FBS) ± 25 nM Na2SeO3. Se- (2.5% FBS) and Se+ (2.5% FBS + 25 nM Na2SeO3) cells were cultured in the presence or absence of 0.05 μg/mL LPS and/or 0.5 μM AFN. Nrf2 activation was determined by measuring NADPH quinone oxidoreductase-1 (Nqo1) and glutathione levels. IL-1β mRNA (Il1b) and protein levels were measured using qRT-PCR and ELISA. Data were analyzed by ANOVA followed by Tukey's post-hoc. KEY FINDINGS We detected an independent effect of AFN, but not LPS, on Nqo1 expression and GSH levels in Se+ and Se- cells. LPS significantly increased Il1b and IL-1β levels in both groups. AFN-mediated attenuation of this effect was not impacted by Se status. SIGNIFICANCE The beneficial effects of Txnrd1 inhibition in alveolar macrophages are Se-independent and therefore unlikely to be diminished by clinical Se deficiency.
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Affiliation(s)
- Sara Staples
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stephanie B Wall
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rui Li
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Trent E Tipple
- Center for Pregnancy and Newborn Research, Section of Neonatal-Perinatal Medicine, Department of Pediatrics, University of Oklahoma College of Medicine, Oklahoma City, OK, USA.
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14
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Zhao X, Shi Y, Zhang D, Tong X, Sun Y, Xue X, Fu J. Autophagy inducer activates Nrf2-ARE pathway to attenuate aberrant alveolarization in neonatal rats with bronchopulmonary dysplasia. Life Sci 2020; 252:117662. [DOI: 10.1016/j.lfs.2020.117662] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/28/2020] [Accepted: 04/10/2020] [Indexed: 01/18/2023]
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15
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Dunigan-Russell K, Lin V, Silverberg M, Wall SB, Li R, Gotham J, Nicola T, Sridharan A, Snowball J, Delaney C, Li Q, Tipple TE. Aurothioglucose enhances proangiogenic pathway activation in lungs from room air and hyperoxia-exposed newborn mice. Am J Physiol Lung Cell Mol Physiol 2020; 318:L1165-L1171. [PMID: 32292070 DOI: 10.1152/ajplung.00086.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD), a long-term respiratory morbidity of prematurity, is characterized by attenuated alveolar and vascular development. Supplemental oxygen and immature antioxidant defenses contribute to BPD development. Our group identified thioredoxin reductase-1 (TXNRD1) as a therapeutic target to prevent BPD. The present studies evaluated the impact of the TXNRD1 inhibitor aurothioglucose (ATG) on pulmonary responses and gene expression in newborn C57BL/6 pups treated with saline or ATG (25 mg/kg ip) within 12 h of birth and exposed to room air (21% O2) or hyperoxia (>95% O2) for 72 h. Purified RNA from lung tissues was sequenced, and differential expression was evaluated. Hyperoxic exposure altered ~2,000 genes, including pathways involved in glutathione metabolism, intrinsic apoptosis signaling, and cell cycle regulation. The isolated effect of ATG treatment was limited primarily to genes that regulate angiogenesis and vascularization. In separate studies, pups were treated as described above and returned to room air until 14 days. Vascular density analyses were performed, and ANOVA indicated an independent effect of hyperoxia on vascular density and alveolar architecture at 14 days. Consistent with RNA-seq analyses, ATG significantly increased vascular density in room air, but not in hyperoxia-exposed pups. These findings provide insights into the mechanisms by which TXNRD1 inhibitors may enhance lung development.
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Affiliation(s)
- Katelyn Dunigan-Russell
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Vivian Lin
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Mary Silverberg
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Stephanie B Wall
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Rui Li
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - John Gotham
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Teodora Nicola
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Anusha Sridharan
- Division of Neonatology, Perinatal and Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - John Snowball
- Division of Neonatology, Perinatal and Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Cassidy Delaney
- Section of Neonatology, Department of Pediatrics, University of Colorado Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Qian Li
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama.,Division of Neonatology, Perinatal and Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Trent E Tipple
- Section of Neonatal-Perinatal Medicine, Department of Pediatrics, University of Oklahoma, Oklahoma City, Oklahoma
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16
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Lignelli E, Palumbo F, Myti D, Morty RE. Recent advances in our understanding of the mechanisms of lung alveolarization and bronchopulmonary dysplasia. Am J Physiol Lung Cell Mol Physiol 2019; 317:L832-L887. [PMID: 31596603 DOI: 10.1152/ajplung.00369.2019] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is the most common cause of morbidity and mortality in preterm infants. A key histopathological feature of BPD is stunted late lung development, where the process of alveolarization-the generation of alveolar gas exchange units-is impeded, through mechanisms that remain largely unclear. As such, there is interest in the clarification both of the pathomechanisms at play in affected lungs, and the mechanisms of de novo alveoli generation in healthy, developing lungs. A better understanding of normal and pathological alveolarization might reveal opportunities for improved medical management of affected infants. Furthermore, disturbances to the alveolar architecture are a key histopathological feature of several adult chronic lung diseases, including emphysema and fibrosis, and it is envisaged that knowledge about the mechanisms of alveologenesis might facilitate regeneration of healthy lung parenchyma in affected patients. To this end, recent efforts have interrogated clinical data, developed new-and refined existing-in vivo and in vitro models of BPD, have applied new microscopic and radiographic approaches, and have developed advanced cell-culture approaches, including organoid generation. Advances have also been made in the development of other methodologies, including single-cell analysis, metabolomics, lipidomics, and proteomics, as well as the generation and use of complex mouse genetics tools. The objective of this review is to present advances made in our understanding of the mechanisms of lung alveolarization and BPD over the period 1 January 2017-30 June 2019, a period that spans the 50th anniversary of the original clinical description of BPD in preterm infants.
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Affiliation(s)
- Ettore Lignelli
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, member of the German Center for Lung Research, Giessen, Germany
| | - Francesco Palumbo
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, member of the German Center for Lung Research, Giessen, Germany
| | - Despoina Myti
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, member of the German Center for Lung Research, Giessen, Germany
| | - Rory E Morty
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, member of the German Center for Lung Research, Giessen, Germany
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17
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Chu XY, Cai C, Zhang XY, Zhou HL, Sun JF, Weng BW. [Effect of hyperoxic exposure on the expression of heme oxygenase-1 and glutamate-L-cysteine ligase catalytic subunit in lung tissue of preterm rats]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2019; 21:594-600. [PMID: 31208516 PMCID: PMC7389583 DOI: 10.7499/j.issn.1008-8830.2019.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
OBJECTIVE To study the effect of hyperoxic exposure on the dynamic expression of heme oxygenase-1 (HO-1) and glutamate-L-cysteine ligase catalytic subunit (GCLC) in the lung tissue of preterm neonatal rats. METHODS Cesarean section was performed for rats on day 21 of gestation to obtain 80 preterm rats, which were randomly divided into air group and hyperoxia group after one day of feeding. The rats in the air group were housed in room air under atmospheric pressure, and those in the hyperoxia group were placed in an atmospheric oxygen tank (oxygen concentration 85%-95%) in the same room. Eight rats each were selected from each group on days 1, 4, 7, 10, and 14, and lung tissue samples were collected. Hematoxylin and eosin staining was used to observe the pathological changes of lung tissue at different time points after air or hyperoxic exposure. Western blot and RT-qPCR were used to measure the protein and mRNA expression of HO-1 and GCLC in the lung tissue of preterm rats at different time points after air or hyperoxic exposure. RESULTS Compared with the air group, the hyperoxia group had a significant reduction in the body weight (P<0.05). Compared with the air group, the hyperoxia group had structural disorder, widening of alveolar septa, a reduction in the number of alveoli, and simplification of the alveoli on the pathological section of lung tissue. Compared with the air group, the hyperoxia group had significantly lower relative mRNA expression of HO-1 in the lung tissue on day 7 and significantly higher expression on days 10 and 14 (P<0.05). Compared with the air group, the hyperoxia group had significantly lower mRNA expression of GCLC in the lung tissue on days 1, 4, and 7 and significantly higher expression on day 10 (P<0.05). Compared with the air group, the hyperoxia group had significantly higher protein expression of HO-1 in the lung tissue on all days, and the protein expression of GCLC had same results as HO-1, except on day 1 (P<0.05). CONCLUSIONS Hyperoxia exposure may lead to growth retardation and lung developmental retardation in preterm rats. Changes in the protein and mRNA expression of HO-1 and GCLC in the lung tissue of preterm rats may be associated with the pathogenesis of hyperoxia-induced lung injury in preterm rats.
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Affiliation(s)
- Xiao-Yun Chu
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, China.
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