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Li JH, Wan HX, Wu LH, Fang F, Wang JX, Dong H, Xu F. Calcitonin gene‑related peptide alleviates hyperoxia‑induced human alveolar cell injury via the CGRPR/TRPV1/Ca2 + axis. Mol Med Rep 2024; 30:110. [PMID: 38695251 PMCID: PMC11082723 DOI: 10.3892/mmr.2024.13234] [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: 02/20/2024] [Accepted: 04/12/2024] [Indexed: 05/12/2024] Open
Abstract
Although exogenous calcitonin gene‑related peptide (CGRP) protects against hyperoxia‑induced lung injury (HILI), the underlying mechanisms remain unclear. The present study attempted to elucidate the molecular mechanism by which CGRP protects against hyperoxia‑induced alveolar cell injury. Human alveolar A549 cells were treated with 95% hyperoxia to establish a hyperoxic cell injury model. ELISA was performed to detect the CGRP secretion. Immunofluorescence, quantitative (q)PCR, and western blotting were used to detect the expression and localization of CGRP receptor (CGRPR) and transient receptor potential vanilloid 1 (TRPV1). Cell counting kit‑8 and flow cytometry were used to examine the proliferation and apoptosis of treated cells. Digital calcium imaging and patch clamp were used to analyze the changes in intracellular Ca2+ signaling and membrane currents induced by CGRP in A549 cells. The mRNA and protein expression levels of Cyclin D1, proliferating cell nuclear antigen (PCNA), Bcl‑2 and Bax were detected by qPCR and western blotting. The expression levels of CGRPR and TRPV1 in A549 cells were significantly downregulated by hyperoxic treatment, but there was no significant difference in CGRP release between cells cultured under normal air and hyperoxic conditions. CGRP promoted cell proliferation and inhibited apoptosis in hyperoxia, but selective inhibitors of CGRPR and TRPV1 channels could effectively attenuate these effects; TRPV1 knockdown also attenuated this effect. CGRP induced Ca2+ entry via the TRPV1 channels and enhanced the membrane non‑selective currents through TRPV1 channels. The CGRP‑induced increase in intracellular Ca2+ was reduced by inhibiting the phospholipase C (PLC)/protein kinase C (PKC) pathway. Moreover, PLC and PKC inhibitors attenuated the effects of CGRP in promoting cell proliferation and inhibiting apoptosis. In conclusion, exogenous CGRP acted by inversely regulating the function of TRPV1 channels in alveolar cells. Importantly, CGRP protected alveolar cells from hyperoxia‑induced injury via the CGRPR/TRPV1/Ca2+ axis, which may be a potential target for the prevention and treatment of the HILI.
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Affiliation(s)
- Jun-Hui Li
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing 400037, P.R. China
| | - Han-Xing Wan
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing 400037, P.R. China
| | - Li-Hong Wu
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing 400037, P.R. China
| | - Fang Fang
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing 400037, P.R. China
| | - Jian-Xin Wang
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao, Shandong 266073, P.R. China
| | - Hui Dong
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing 400037, P.R. China
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao, Shandong 266073, P.R. China
| | - Feng Xu
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing 400037, P.R. China
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Gu Z, Sun M, Liu J, Huang Q, Wang Y, Liao J, Shu T, Tao M, Mao G, Pei Z, Meng W, Zhang X, Wei Y, Zhang S, Li S, Xiao K, Lu Y, Xu Q. Endothelium-Derived Engineered Extracellular Vesicles Protect the Pulmonary Endothelial Barrier in Acute Lung Injury. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306156. [PMID: 38062916 PMCID: PMC10853733 DOI: 10.1002/advs.202306156] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/17/2023] [Indexed: 02/10/2024]
Abstract
Acute lung injury (ALI) is a severe respiratory disease with a high mortality rate. The integrity of the pulmonary endothelial barrier influences the development and prognosis of ALI. Therefore, it has become an important target for ALI treatment. Extracellular vesicles (EVs) are promising nanotherapeutic agents against ALI. Herein, endothelium-derived engineered extracellular vesicles (eEVs) that deliver microRNA-125b-5p (miRNA-125b) to lung tissues exerting a protective effect on endothelial barrier integrity are reported. eEVs that are modified with lung microvascular endothelial cell-targeting peptides (LET) exhibit a prolonged retention time in lung tissues and targeted lung microvascular endothelial cells in vivo and in vitro. To improve the efficacy of the EVs, miRNA-125b is loaded into EVs. Finally, LET-EVs-miRNA-125b is constructed. The results show that compared to the EVs, miRNA-125b, and EVs-miRNA-125b, LET-EVs-miRNA-125b exhibit the most significant treatment efficacy in ALI. Moreover, LET-EVs-miRNA-125b is found to have an important protective effect on endothelial barrier integrity by inhibiting cell apoptosis, promoting angiogenesis, and protecting intercellular junctions. Sequencing analysis reveals that LET-EVs-miRNA-125b downregulates early growth response-1 (EGR1) levels, which may be a potential mechanism of action. Taken together, these findings suggest that LET-EVs-miRNA-125b can treat ALI by protecting the endothelial barrier integrity.
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Affiliation(s)
- Zhengyan Gu
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
- Department of Pharmaceutical SciencesSchool of PharmacyNaval Medical UniversityShanghai200433P. R. China
| | - Mingxue Sun
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Jihao Liu
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Qi Huang
- School of Traditional Chinese Materia MedicaShenyang Pharmaceutical UniversityShenyang110006P. R. China
| | - Yunqin Wang
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Jun Liao
- Department of Pharmaceutical SciencesSchool of PharmacyNaval Medical UniversityShanghai200433P. R. China
- School of MedicineShanghai UniversityShanghai200444P. R. China
| | - Tingbin Shu
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Min Tao
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Guanchao Mao
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Zhipeng Pei
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Wenqi Meng
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Xinkang Zhang
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Youheng Wei
- State Key Laboratory of Genetic EngineeringInstitute of GeneticsFudan UniversityShanghai200433P. R. China
| | - Shanshan Zhang
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Songling Li
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
| | - Kai Xiao
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
- Marine Biomedical Science and Technology Innovation Platform of Lingang Special AreaShanghai200433P. R. China
| | - Ying Lu
- Department of Pharmaceutical SciencesSchool of PharmacyNaval Medical UniversityShanghai200433P. R. China
| | - Qingqiang Xu
- Lab of Toxicology and PharmacologyFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
- Basic Medical Center for Pulmonary DiseaseFaculty of Naval MedicineNaval Medical UniversityShanghai200433P. R. China
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Lan J, Chen X, Xu F, Tao F, Liu L, Cheng R, Li N, Pan Y. Self-assembled miR-134-5p inhibitor nanoparticles ameliorate experimental bronchopulmonary dysplasia (BPD) via suppressing ferroptosis. Mikrochim Acta 2023; 190:491. [PMID: 38030848 PMCID: PMC10687138 DOI: 10.1007/s00604-023-06069-3] [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] [Received: 07/21/2023] [Accepted: 10/22/2023] [Indexed: 12/01/2023]
Abstract
Bronchopulmonary dysplasia (BPD) is a chronic lung disease in premature infants with increased levels of reactive oxygen species (ROS) and ferroptosis. Herein, we designed a peptide-based nanoparticle to deliver therapeutic molecules to pulmonary, thereby ameliorating BPD. The BPD-induced damages of lung tissues were detected by H&E and immunohistochemistry staining. Inflammatory cytokines, Fe2+, and ROS levels were quantified by the indicated kits, respectively. The targeting relationship was verified by luciferase reporter assay and pull-down assay. Subsequently, self-assembled miR-134-5p inhibitor nanoparticles with pulmonary epithelial cell-targeting were synthesized. The characteristics were detected by transmission electron microscopy, luminescence imaging, and dynamic light scattering. A significant ferroptosis was observed in the BPD mice. The protein level of GPX4 was decreased significantly compared to the control group. Constantly, miR-134-5p showed positive regulation on ferroptosis by targeting GPX4. The designed nanoparticles were mainly accumulated in the lung region. Besides, it ameliorated experimental bronchopulmonary dysplasia via suppressing ferroptosis, in vivo and in vitro. Our findings provided a miR-134-5p/GPX4 axis in regulating ferroptosis of BPD and prompted the potential of applying the peptide-based nanoparticle to BPD treatment.
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Affiliation(s)
- Jiang Lan
- Shenzhen Longhua Maternity and Child Health Care Hospital, Shenzhen, 518000, China
- Hongqiao International Institute of Medicine, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, China
| | - Xu Chen
- Children's Hospital Affiliated to Nanjing Medical University (Nanjing Children's Hospital), Nanjing, 210008, China
| | - Fengdan Xu
- Dongguan Children's Hospital Affiliated to Guangdong Medical University, Dongguan, 523325, China
| | - Fangfei Tao
- Children's Hospital Affiliated to Nanjing Medical University (Nanjing Children's Hospital), Nanjing, 210008, China
| | - Liyuan Liu
- Shenzhen Longhua Maternity and Child Health Care Hospital, Shenzhen, 518000, China
| | - Rui Cheng
- Children's Hospital Affiliated to Nanjing Medical University (Nanjing Children's Hospital), Nanjing, 210008, China.
| | - Ning Li
- Dongguan Children's Hospital Affiliated to Guangdong Medical University, Dongguan, 523325, China.
| | - Ya Pan
- Shenzhen Longhua Maternity and Child Health Care Hospital, Shenzhen, 518000, China.
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Abstract
Bronchopulmonary dysplasia (BPD) in neonates is the most common pulmonary disease that causes neonatal mortality, has complex pathogenesis, and lacks effective treatment. It is associated with chronic obstructive pulmonary disease, pulmonary hypertension, and right ventricular hypertrophy. The occurrence and development of BPD involve various factors, of which premature birth is the most crucial reason for BPD. Under the premise of abnormal lung structure and functional product, newborns are susceptible to damage to oxides, free radicals, hypoxia, infections and so on. The most influential is oxidative stress, which induces cell death in different ways when the oxidative stress balance in the body is disrupted. Increasing evidence has shown that programmed cell death (PCD), including apoptosis, necrosis, autophagy, and ferroptosis, plays a significant role in the molecular and biological mechanisms of BPD and the further development of the disease. Understanding the mode of PCD and its signaling pathways can provide new therapeutic approaches and targets for the clinical treatment of BPD. This review elucidates the mechanism of BPD, focusing on the multiple types of PCD in BPD and their molecular mechanisms, which are mainly based on experimental results obtained in rodents.
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Sun YF, Ma L, Li JH, Yang Y, Gong XH, Cai C. Involvement of miR-495 overexpression in the pathogenesis of bronchopulmonary dysplasia in preterm infants via the targeting of NEDD4L-ENaC pathway. ANNALS OF TRANSLATIONAL MEDICINE 2023; 11:4. [PMID: 36760249 PMCID: PMC9906200 DOI: 10.21037/atm-22-3293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 11/07/2022] [Indexed: 12/24/2022]
Abstract
Background Bronchopulmonary dysplasia (BPD) is a severe pulmonary complication causing morbidity and mortality in preterm infants. A key histopathological feature of BPD is late lung growth retardation, in which the process of alveolarization is hindered and the mechanism of which is unclear. Emerging evidence indicates that microRNAs (miRNAs) promote the development of BPD via the inhibition of their target genes. MiR-495 has been reported to be involved in various lung diseases. However, the physiological function of miR-495 in BPD has not yet been fully understood. Methods Differentially expressed miRNAs in peripheral blood of patients with BPD were compared with those of normal controls. A dual-luciferase reporter assay was performed to identify the target genes of miR-495. A BPD neonatal rat model was established by injecting lipopolysaccharide (LPS) in the amniotic sac of pregnant rats. The morphology of the lungs was observed using hematoxylin and eosin (HE) staining. The expression of miR-495, neural precursor cell expressed developmentally down-regulated 4-like (NEDD4L), and epithelial Na+ channel (ENaC) was tested using quantitative reverse transcription-polymerase chain reaction (qRT-PCR), Western blot analysis, and immunofluorescent (IF) staining. Results The expression of miR-495 was significantly increased in the peripheral blood samples of premature infants with BPD and verified using qRT-PCR. NEDD4L was proven to be the target gene of miR-495. Additionally, miR-495 expression was also increased in the lungs of rat pups with BPD at postnatal day (P) 3 compared with the control group. qRT-PCR and Western blot results showed that NEDD4L expression was decreased while ENaC expression was increased at the transcriptional and translational levels. IF staining results showed that NEDD4L level was decreased while ENaC level was increased in the LPS-induced BPD rat model, which was consistent with abnormal changes in alveolar structure. Conclusions The aberrant overexpression of miR-495 may contribute to the development of BPD by targeting NEDD4L-ENaC pathway, implying an imbalance in lung fluid clearance.
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Affiliation(s)
- Yi-Fan Sun
- Department of Neonatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Li Ma
- Department of Neonatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jian-Hui Li
- Department of Neonatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuan Yang
- Department of Neonatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiao-Hui Gong
- Department of Neonatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Cheng Cai
- Department of Neonatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Non-coding RNAs in ferroptotic cancer cell death pathway: meet the new masters. Hum Cell 2022; 35:972-994. [PMID: 35415781 DOI: 10.1007/s13577-022-00699-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 04/01/2022] [Indexed: 02/08/2023]
Abstract
Despite the recent advances in cancer therapy, cancer chemoresistance looms large along with radioresistance, a major challenge in dire need of thorough and minute investigation. Not long ago, cancer cells were reported to have proven refractory to the ferroptotic cell death, a newly discovered form of regulated cell death (RCD), conspicuous enough to draw attention from scholars in terms of targeting ferroptosis as a prospective therapeutic strategy. However, our knowledge concerning the underlying molecular mechanisms through which cancer cells gain immunity against ferroptosis is still in its infancy. Of late, the implication of non-coding RNAs (ncRNAs), including circular RNAs (circRNAs), microRNAs (miRNAs), and long non-coding RNAs (lncRNAs) in ferroptosis has been disclosed. Nevertheless, precisely explaining the molecular mechanisms behind the contribution of ncRNAs to cancer radio/chemotherapy resistance remains a challenge, requiring further clarification. In this review, we have presented the latest available information on the ways and means of regulating ferroptosis by ncRNAs. Moreover, we have provided important insights about targeting ncRNAs implicated in ferroptosis with the hope of opening up new horizons for overcoming cancer treatment modalities. Though a long path awaits until we make this ambitious dream come true, recent progress in gene therapy, including gene-editing technology will aid us to be optimistic that ncRNAs-based ferroptosis targeting would soon be on stream as a novel therapeutic strategy for treating cancer.
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Liu JX, Ma DY, Zhi XY, Wang MW, Zhao JY, Qin Y. MiR-125b attenuates retinal pigment epithelium oxidative damage via targeting Nrf2/HIF-1α signal pathway. Exp Cell Res 2022; 410:112955. [PMID: 34875217 DOI: 10.1016/j.yexcr.2021.112955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/26/2021] [Accepted: 12/01/2021] [Indexed: 01/17/2023]
Abstract
The retinal pigment epithelium cells (RPE) are sensitive to oxidative stimuli due to long-term exposure to various environmental stimuli. Thus, the oxidative injury of RPE cells caused by the imbalance of redox homeostasis is one of the main pathogenic factors of age-related macular degeneration (AMD). But the sophisticated mechanisms linking AMD to oxidative stress are not fully elucidated. Activation of Nrf2 signal pathway can protect RPE cells from oxidative damage. The present study investigated the regulating mechanism of miR-125b in Nrf2 cascade and evaluated its antioxidant capacity. The in vitro studies indicated that overexpression of miR-125b substantially inhibited Keap1 expression, enhanced Nrf2 expression and induced Nrf2 nuclear translocation. Importantly, functional studies demonstrated that forced expression of miR-125b could significantly elevate cell proliferation and superoxide dismutase (SOD) levels while reduce reactive oxygen species (ROS) overproduction and malondialdehyde (MDA) formation. Further studies showed that miR-125b had no effect when Nrf2 was silenced in ARPE-19 cells. Additionally, the results identified that Nrf2 silence induced ROS accumulation enhances HIF-1α protein expression, while miR-125b could offset this effect via promoting HIF-1α protein degradation. Subsequent in vivo studies demonstrated that sodium iodate induced outer retina thinner was reversed with exogenous supplementation of miR-125b, which was cancelled in Nrf2 knockout mice. In conclusion, this study illustrated that miR-125b can protect RPE from oxidative damage via targeting Nrf2/HIF-1α signal pathway and potentially may serve as a therapeutic agent of AMD.
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Affiliation(s)
- Jin-Xia Liu
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang City, Liaoning Province, 110005, PR China
| | - Dong-Yue Ma
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang City, Liaoning Province, 110005, PR China
| | - Xin-Yu Zhi
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang City, Liaoning Province, 110005, PR China
| | - Ming-Wu Wang
- Department of Ophthalmology and Vision Science, University of Arizona College of Medicine, Tucson, AZ 85710, USA; NeuVision Medical Institute, Tucson, AZ 85718, USA
| | - Jiang-Yue Zhao
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang City, Liaoning Province, 110005, PR China
| | - Yu Qin
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang City, Liaoning Province, 110005, PR China.
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Protective effect of adrenomedullin on hyperoxia-induced lung injury. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2021; 23:1282-1288. [PMID: 34911614 PMCID: PMC8690717 DOI: 10.7499/j.issn.1008-8830.2109005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES To study the role of adrenomedullin (ADM) in hyperoxia-induced lung injury by examining the effect of ADM on the expression of calcitonin receptor-like receptor (CRLR), receptor activity-modifying protein 2 (RAMP2), extracellular signal-regulated kinase (ERK), and protein kinase B (PKB) in human pulmonary microvascular endothelial cells (HPMECs) under different experimental conditions. METHODS HPMECs were randomly divided into an air group and a hyperoxia group (n=3 each).The HPMECs in the hyperoxia group were cultured in an atmosphere of 92% O2 (3 L/minute) +5% CO2. RT-qPCR and Western blot were used to measure the mRNA and protein expression levels of ADM, CRLR, RAMP2, ERK1/2, and PKB. Other HPMECs were divided into a non-interference group and an interference group (n=3 each), and the mRNA and protein expression levels of ADM, ERK1/2, and PKB were measured after the HPMECs in the interference group were transfected with ADM siRNA. RESULTS Compared with the air group, the hyperoxia group had significant increases in the mRNA and protein expression levels of ADM, CRLR, RAMP2, ERK1/2, and PKB (P<0.05). Compared with the non-interference group, the interference group had significant reductions in the mRNA and protein expression levels of ADM, ERK1/2, and PKB (P<0.05). CONCLUSIONS ERK1/2 and PKB may be the downstream targets of the ADM signaling pathway. ADM mediates the ERK/PKB signaling pathway by regulating CRLR/RAMP2 and participates in the protection of hyperoxia-induced lung injury.
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Chen J, Chen Y, Du X, Liu G, Fei X, Peng JR, Zhang X, Xiao F, Wang X, Yang X, Feng Z. Integrative Studies of Human Cord Blood Derived Mononuclear Cells and Umbilical Cord Derived Mesenchyme Stem Cells in Ameliorating Bronchopulmonary Dysplasia. Front Cell Dev Biol 2021; 9:679866. [PMID: 34858969 PMCID: PMC8631197 DOI: 10.3389/fcell.2021.679866] [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: 03/12/2021] [Accepted: 08/30/2021] [Indexed: 11/13/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a common pulmonary complication observed in preterm infants that is composed of multifactorial pathogenesis. Current strategies, albeit successful in moderately reducing morbidity and mortality of BPD, failed to draw overall satisfactory conclusion. Here, using a typical mouse model mimicking hallmarks of BPD, we revealed that both cord blood-derived mononuclear cells (CB-MNCs) and umbilical cord-derived mesenchymal stem cells (UC-MSCs) are efficient in alleviating BPD. Notably, infusion of CB-MNCs has more prominent effects in preventing alveolar simplification and pulmonary vessel loss, restoring pulmonary respiratory functions and balancing inflammatory responses. To further elucidate the underlying mechanisms within the divergent therapeutic effects of UC-MSC and CB-MNC, we systematically investigated the long noncoding RNA (lncRNA)-microRNA (miRNA)-messenger RNA (mRNA) and circular RNA (circRNA)-miRNA-mRNA networks by whole-transcriptome sequencing. Importantly, pathway analysis integrating Gene Ontology (GO)/Kyoto Encyclopedia of Genes and Genomes (KEGG)/gene set enrichment analysis (GSEA) method indicates that the competing endogenous RNA (ceRNA) network is mainly related to the regulation of GTPase activity (GO: 0043087), extracellular signal-regulated kinase 1 (ERK1) and ERK2 signal cascade (GO: 0070371), chromosome regulation (GO: 0007059), and cell cycle control (GO: 0044770). Through rigorous selection of the lncRNA/circRNA-based ceRNA network, we demonstrated that the hub genes reside in UC-MSC- and CB-MNC-infused networks directed to the function of cell adhesion, motor transportation (Cdk13, Lrrn2), immune homeostasis balance, and autophagy (Homer3, Prkcd) relatively. Our studies illustrate the first comprehensive mRNA-miRNA-lncRNA and mRNA-miRNA-circRNA networks in stem cell-infused BPD model, which will be valuable in identifying reliable biomarkers or therapeutic targets for BPD pathogenesis and shed new light in the priming and conditioning of UC-MSCs or CB-MNCs in the treatment of neonatal lung injury.
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Affiliation(s)
- Jia Chen
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Department of Neonatology, Senior Department of Pediatrics, The Seventh Medical Center of PLA General Hospital, Beijing, China.,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing, China.,Beijing Key Laboratory of Pediatric Organ Failure, Beijing, China
| | - Yuhan Chen
- Department of Neonatology, Senior Department of Pediatrics, The Seventh Medical Center of PLA General Hospital, Beijing, China.,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing, China.,Beijing Key Laboratory of Pediatric Organ Failure, Beijing, China
| | - Xue Du
- Department of Neonatology, Senior Department of Pediatrics, The Seventh Medical Center of PLA General Hospital, Beijing, China.,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing, China.,Beijing Key Laboratory of Pediatric Organ Failure, Beijing, China.,The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Guojun Liu
- Shandong Qilu Stem Cell Engineering Co., Ltd., Jinan, China
| | - Xiaowei Fei
- The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Jian Ru Peng
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Department of Neonatology, Senior Department of Pediatrics, The Seventh Medical Center of PLA General Hospital, Beijing, China.,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing, China.,Beijing Key Laboratory of Pediatric Organ Failure, Beijing, China
| | - Xing Zhang
- Department of Neonatology, Senior Department of Pediatrics, The Seventh Medical Center of PLA General Hospital, Beijing, China.,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing, China.,Beijing Key Laboratory of Pediatric Organ Failure, Beijing, China
| | - Fengjun Xiao
- Department of Experimental Hematology and Biochemistry, Beijing Institute of Radiation Medicine, Beijing, China
| | - Xue Wang
- Experimental Research Center, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xiao Yang
- Department of Neonatology, Senior Department of Pediatrics, The Seventh Medical Center of PLA General Hospital, Beijing, China.,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing, China.,Beijing Key Laboratory of Pediatric Organ Failure, Beijing, China
| | - Zhichun Feng
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Department of Neonatology, Senior Department of Pediatrics, The Seventh Medical Center of PLA General Hospital, Beijing, China.,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing, China.,Beijing Key Laboratory of Pediatric Organ Failure, Beijing, China.,The First Affiliated Hospital of Dalian Medical University, Dalian, China
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Ristescu AI, Tiron CE, Tiron A, Grigoras I. Exploring Hyperoxia Effects in Cancer-From Perioperative Clinical Data to Potential Molecular Mechanisms. Biomedicines 2021; 9:biomedicines9091213. [PMID: 34572400 PMCID: PMC8470547 DOI: 10.3390/biomedicines9091213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/06/2021] [Accepted: 09/10/2021] [Indexed: 12/15/2022] Open
Abstract
Increased inspiratory oxygen concentration is constantly used during the perioperative period of cancer patients to prevent the potential development of hypoxemia and to provide an adequate oxygen transport to the organs, tissues and cells. Although the primary tumours are surgically removed, the effects of perioperative hyperoxia exposure on distal micro-metastases and on circulating cancer cells can potentially play a role in cancer progression or recurrence. In clinical trials, hyperoxia seems to increase the rate of postoperative complications and, by delaying postoperative recovery, it can alter the return to intended oncological treatment. The effects of supplemental oxygen on the long-term mortality of surgical cancer patients offer, at this point, conflicting results. In experimental studies, hyperoxia effects on cancer biology were explored following multiple pathways. In cancer cell cultures and animal models, hyperoxia increases the production of reactive oxygen species (ROS) and increases the oxidative stress. These can be followed by the induction of the expression of Brain-derived neurotrophic factor (BDNF) and other molecules involved in angiogenesis and by the promotion of various degrees of epithelial mesenchymal transition (EMT).
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Affiliation(s)
- Anca Irina Ristescu
- Department of Anaesthesia and Intensive Care, School of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (A.I.R.); (I.G.)
- Department of Anaesthesia and Intensive Care, Regional Institute of Oncology, 700483 Iasi, Romania
| | - Crina Elena Tiron
- TRANSCEND Research Centre, Regional Institute of Oncology, 700483 Iasi, Romania;
| | - Adrian Tiron
- TRANSCEND Research Centre, Regional Institute of Oncology, 700483 Iasi, Romania;
- Correspondence:
| | - Ioana Grigoras
- Department of Anaesthesia and Intensive Care, School of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (A.I.R.); (I.G.)
- Department of Anaesthesia and Intensive Care, Regional Institute of Oncology, 700483 Iasi, Romania
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11
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Oji-Mmuo CN, Siddaiah R, Montes DT, Pham MA, Spear D, Donnelly A, Fuentes N, Imamura-Kawasawa Y, Howrylak JA, Thomas NJ, Silveyra P. Tracheal aspirate transcriptomic and miRNA signatures of extreme premature birth with bronchopulmonary dysplasia. J Perinatol 2021; 41:551-561. [PMID: 33177681 DOI: 10.1038/s41372-020-00868-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 10/06/2020] [Accepted: 10/28/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Extreme preterm infants are a growing population in neonatal intensive care units who carry a high mortality and morbidity. Multiple factors play a role in preterm birth, resulting in major impact on organogenesis leading to complications including bronchopulmonary dysplasia (BPD). The goal of this study was to identify biomarker signatures associated with prematurity and BPD. STUDY DESIGN We analyzed miRNA and mRNA profiles in tracheal aspirates (TAs) from 55 infants receiving invasive mechanical ventilation. Twenty-eight infants were extremely preterm and diagnosed with BPD, and 27 were term babies receiving invasive mechanical ventilation for elective procedures. RESULT We found 22 miRNAs and 33 genes differentially expressed (FDR < 0.05) in TAs of extreme preterm infants with BPD vs. term babies without BPD. Pathway analysis showed associations with inflammatory response, cellular growth/proliferation, and tissue development. CONCLUSIONS Specific mRNA-miRNA signatures in TAs may serve as biomarkers for BPD pathogenesis, a consequence of extreme prematurity.
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Affiliation(s)
| | - Roopa Siddaiah
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA, USA
| | - Deborah T Montes
- Biobehavioral Laboratory, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Melody A Pham
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA, USA
| | - Debra Spear
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA, USA
| | - Ann Donnelly
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA, USA
| | - Nathalie Fuentes
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA, USA
| | - Yuka Imamura-Kawasawa
- Institute for Personalized Medicine, Departments of Biochemistry and Molecular Biology and Pharmacology, Penn State College of Medicine, Hershey, PA, USA
| | - Judie A Howrylak
- Division of Pulmonary and Critical Care Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Neal J Thomas
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA, USA
| | - Patricia Silveyra
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA, USA. .,Biobehavioral Laboratory, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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12
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Zhang M, Zhang X, Chu X, Cheng L, Cai C. Long non-coding RNA MALAT1 plays a protective role in bronchopulmonary dysplasia via the inhibition of apoptosis and interaction with the Keap1/Nrf2 signal pathway. Transl Pediatr 2021; 10:265-275. [PMID: 33708512 PMCID: PMC7944181 DOI: 10.21037/tp-20-200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Bronchopulmonary dysplasia (BPD) is a common respiratory disease in premature infants and is characterized by alveolar and pulmonary vascular dysplasia. Long-term oxygen exposure can cause BPD in preterm infants. Numerous studies have shown that long non-coding ribonucleic acid (lncRNA) is involved in the process of biological metabolism; however, its role in the development of BPD is unclear. Apoptosis-induced factor (AIF) is a key component involved in apoptosis. The Kelch-like ECH-associated protein 1/nuclear factor erythroid-2-related factor 2 (Keap1/Nrf2) signaling pathway is a body-derived antioxidant signaling pathway. METHODS In this study, the relative expression of metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), AIF, Keap1, and Nrf2 was detected by real-time polymerase chain reaction (PCR). Also, the apoptosis of A549 cells was detected by flow cytometry. RESULTS The results showed that, compared to the control group, the expression of MALAT1 increased significantly, and AIF decreased substantially in BPD premature infants. In the A549 hyperoxic lung injury model, compared with the air group, the expression of MALAT1 in the hyperoxia group decreased markedly, while the expression of Keap1 and Nrf2 increased considerably. Furthermore, compared with the control plasmid transfection air group (NC group), the expression of Keap1 and Nrf2 increased significantly in the small interfering RNA (siRNA) group. CONCLUSIONS These results indicate that MALAT1 can play a protective role in BPD via the reduction of apoptosis and anti-oxidation, offering clinicians a new way to prevent and treat BPD.
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Affiliation(s)
- Min Zhang
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyue Zhang
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyun Chu
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Lihua Cheng
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Cheng Cai
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
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13
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Ji L, Liu Z, Dong C, Wu D, Yang S, Wu L. LncRNA CASC2 targets CAV1 by competitively binding with microRNA-194-5p to inhibit neonatal lung injury. Exp Mol Pathol 2020; 118:104575. [PMID: 33212124 DOI: 10.1016/j.yexmp.2020.104575] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 10/08/2020] [Accepted: 11/11/2020] [Indexed: 10/23/2022]
Abstract
Long non-coding RNAs (lncRNAs) are vital regulators of different biological processes during bronchopulmonary dysplasia (BPD). This study was conducted to probe the biological roles of lncRNA CASC2 in the pathogenesis of BPD and neonatal lung injury. Firstly, a hyperoxia-induced mouse model with BPD was established. LncRNAs with differential expression in lung tissues of normal and BPD mice were analyzed by microarray. An adenovirus vector overexpressing CASC2 was constructed and its functions on BPD symptoms in model mice were analyzed. Gain- and loss-of function studies of CASC2 were performed in a bronchial epithelial cell line BEAS-2B to determine its role in cell apoptosis and proliferation under normoxic and hyperoxic conditions. The downstream mechanical molecules of lncRNA CASC2 were predicted on bioinformatics systems and confirmed by luciferase assays. The functional interactions among lncRNA CASC2, miR-194-5p, and CAV1 in BPD were determined by rescue experiments. Consequently, lncRNA CASC2 was found to be poorly expressed in BPD mice. Besides, overexpressed CASC2 was found to relieve the symptoms of BPD in neonatal mice and suppress apoptosis as well as promote proliferation in hyperoxia-induced BEAS-2B cells. Importantly, CASC2 was found to regulate CAV1 expression by competitively binding to miR-194-5p and downregulate the activity of the TGF-β1 signaling pathway, thereby suppressing lung injury. Either miR-194-5p upregulation or CAV1 downregulation blocked the roles of CASC2. To sum up, this study evidenced that CASC2 alleviates hyperoxia-induced lung injury in mouse and cell models with the involvement of a miR-194-5p-CAV1 crosstalk and the TGF-β1 inactivation.
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Affiliation(s)
- Lili Ji
- Department of Paediatrics, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing 100043, PR China
| | - Zunjie Liu
- Department of Neonatology, Beijing Obsterics and Gynecology Hospital, Capital Medical University, Beijing 100026, PR China
| | - Chengya Dong
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, PR China
| | - Dongping Wu
- Department of Neonatology, Yiwu Central Hospital, Yiwu 322000, Zhejiang, PR China
| | - Shimei Yang
- Department of Pediatrics, Yiwu Maternity and Children Hospital, Yiwu 322000, Zhejiang, PR China
| | - Limei Wu
- Department of Pediatrics, Yiwu Maternity and Children Hospital, Yiwu 322000, Zhejiang, PR China.
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14
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Wang Y, Zhang L, Wu Y, Zhu R, Wang Y, Cao Y, Long W, Ji C, Wang H, You L. Peptidome analysis of umbilical cord mesenchymal stem cell (hUC-MSC) conditioned medium from preterm and term infants. Stem Cell Res Ther 2020; 11:414. [PMID: 32967723 PMCID: PMC7510303 DOI: 10.1186/s13287-020-01931-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/29/2020] [Accepted: 09/09/2020] [Indexed: 12/18/2022] Open
Abstract
Background The therapeutic role of mesenchymal stem cells (MSCs) has been widely confirmed in several animal models of premature infant diseases. Micromolecule peptides have shown promise for the treatment of premature infant diseases. However, the potential role of peptides secreted from MSCs has not been studied. The purpose of this study is to help to broaden the knowledge of the hUC-MSC secretome at the peptide level through peptidomic profile analysis. Methods We used tandem mass tag (TMT) labeling technology followed by tandem mass spectrometry to compare the peptidomic profile of preterm and term umbilical cord MSC (hUC-MSC) conditioned medium (CM). Gene Ontology (GO) enrichment analysis and ingenuity pathway analysis (IPA) were conducted to explore the differentially expressed peptides by predicting the functions of their precursor proteins. To evaluate the effect of candidate peptides on human lung epithelial cells stimulated by hydrogen peroxide (H2O2), quantitative real-time PCR (qRT-PCR), western blot analysis, and enzyme-linked immunosorbent assay (ELISA) were, respectively, adopted to detect inflammatory cytokines (TNF-α, IL-1β, and IL-6) expression levels at the mRNA and protein levels. Results A total of 131 peptides derived from 106 precursor proteins were differentially expressed in the preterm hUC-MSC CM compared with the term group, comprising 37 upregulated peptides and 94 downregulated peptides. Bioinformatics analysis showed that these differentially expressed peptides may be associated with developmental disorders, inflammatory response, and organismal injury. We also found that peptides 7118TGAKIKLVGT7127 derived from MUC19 and 508AAAAGPANVH517 derived from SIX5 reduced the expression levels of TNF-α, IL-1β, and IL-6 in H2O2-treated human lung epithelial cells. Conclusions In summary, this study provides further secretomics information on hUC-MSCs and provides a series of peptides that might have antiinflammatory effects on pulmonary epithelial cells and contribute to the prevention and treatment of respiratory diseases in premature infants.
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Affiliation(s)
- Yu Wang
- Department of Neonatology, Changzhou Maternity and Child Health Care Hospital of Nanjing Medical University, Changzhou, 213000, China.,Nanjing Maternity and Child Health Care Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Lin Zhang
- Department of Neonatology, Changzhou Maternity and Child Health Care Hospital of Nanjing Medical University, Changzhou, 213000, China
| | - Yun Wu
- Department of Ultrasound, Nanjing Maternity and Child Health Care Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Rongping Zhu
- Department of Neonatology, Changzhou Maternity and Child Health Care Hospital of Nanjing Medical University, Changzhou, 213000, China
| | - Yan Wang
- Nanjing Maternity and Child Health Care Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Yan Cao
- Nanjing Maternity and Child Health Care Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Wei Long
- Department of Obstetrics, Nanjing Maternity and Child Health Care Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Chenbo Ji
- Nanjing Maternity and Child Health Care Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Huaiyan Wang
- Department of Neonatology, Changzhou Maternity and Child Health Care Hospital of Nanjing Medical University, Changzhou, 213000, China.
| | - Lianghui You
- Nanjing Maternity and Child Health Care Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China.
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15
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Chen JH, Feng DD, Chen YF, Yang CX, Juan CX, Cao Q, Chen X, Liu S, Zhou GP. Long non-coding RNA MALAT1 targeting STING transcription promotes bronchopulmonary dysplasia through regulation of CREB. J Cell Mol Med 2020; 24:10478-10492. [PMID: 32812343 PMCID: PMC7521324 DOI: 10.1111/jcmm.15661] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/22/2020] [Accepted: 07/02/2020] [Indexed: 12/22/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a severe complication of preterm infants characterized by increased alveolarization and inflammation. Premature exposure to hyperoxia is believed to be a key contributor to the pathogenesis of BPD. No effective preventive or therapeutic agents have been created. Stimulator of interferon gene (STING) is associated with inflammation and apoptosis in various lung diseases. Long non-coding RNA MALAT1 has been reported to be involved in BPD. However, how MALAT1 regulates STING expression remains unknown. In this study, we assessed that STING and MALAT1 were up-regulated in the lung tissue from BPD neonates, hyperoxia-based rat models and lung epithelial cell lines. Then, using the flow cytometry and cell proliferation assay, we found that down-regulating of STING or MALAT1 inhibited the apoptosis and promoted the proliferation of hyperoxia-treated cells. Subsequently, qRT-PCR, Western blotting and dual-luciferase reporter assays showed that suppressing MALAT1 decreased the expression and promoter activity of STING. Moreover, transcription factor CREB showed its regulatory role in the transcription of STING via a chromatin immunoprecipitation. In conclusion, MALAT1 interacts with CREB to regulate STING transcription in BPD neonates. STING, CREB and MALAT1 may be promising therapeutic targets in the prevention and treatment of BPD.
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Affiliation(s)
- Jia-He Chen
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Dan-Dan Feng
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yu-Fei Chen
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Cai-Xia Yang
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chen-Xia Juan
- Child Mental Health Research Center, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, China
| | - Qian Cao
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xi Chen
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Shuang Liu
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Guo-Ping Zhou
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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16
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Zhang X, Chu X, Gong X, Zhou H, Cai C. The expression of miR-125b in Nrf2-silenced A549 cells exposed to hyperoxia and its relationship with apoptosis. J Cell Mol Med 2019; 24:965-972. [PMID: 31713992 PMCID: PMC6933325 DOI: 10.1111/jcmm.14808] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/24/2019] [Accepted: 10/19/2019] [Indexed: 01/09/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a chronic lung disease that affects the quality of life of infants. At present, premature exposure to hyperoxia for extended periods of time is believed to affect the development of lung tissue and vascularity, resulting in BPD. The oxidative stress caused by hyperoxia exposure is an important risk factor for BPD in premature infants. Nuclear factor E2‐related factor 2 (Nrf2) is an important regulator of antioxidant mechanisms. As a microRNA, microRNA‐125b (miR‐125b) plays an important role in cell proliferation, differentiation and apoptosis. Although the Nrf2/ARE pathway has been extensively studied, little is known about the regulatory role of microRNAs in Nrf2 expression. In this study, the expression levels of Nrf2 and miR‐125b in the lung tissues of premature Sprague Dawley (SD) rats and A549 cells exposed to hyperoxia were detected by quantitative real‐time polymerase chain reaction (qRT‐PCR), and the apoptosis of A549 cells was detected by flow cytometry. The results showed that Nrf2 and miRNA‐125b in the lung tissues of premature rats increased significantly upon exposure to hyperoxia and played a protective role. Nrf2 was suppressed by small interfering RNA (siRNA) in A549 cells, miR‐125b was similarly inhibited, and apoptosis was significantly increased. These results suggest that miR‐125b helps protect against BPD as a downstream target of Nrf2.
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Affiliation(s)
- Xiaoyue Zhang
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyun Chu
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaohui Gong
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Huilin Zhou
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Cheng Cai
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
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