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Anciuc-Crauciuc M, Cucerea MC, Tripon F, Crauciuc GA, Bănescu CV. Descriptive and Functional Genomics in Neonatal Respiratory Distress Syndrome: From Lung Development to Targeted Therapies. Int J Mol Sci 2024; 25:649. [PMID: 38203821 PMCID: PMC10780183 DOI: 10.3390/ijms25010649] [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: 11/13/2023] [Revised: 12/28/2023] [Accepted: 01/02/2024] [Indexed: 01/12/2024] Open
Abstract
In this up-to-date study, we first aimed to highlight the genetic and non-genetic factors associated with respiratory distress syndrome (RDS) while also focusing on the genomic aspect of this condition. Secondly, we discuss the treatment options and the progressing therapies based on RNAs or gene therapy. To fulfill this, our study commences with lung organogenesis, a highly orchestrated procedure guided by an intricate network of conserved signaling pathways that ultimately oversee the processes of patterning, growth, and differentiation. Then, our review focuses on the molecular mechanisms contributing to both normal and abnormal lung growth and development and underscores the connections between genetic and non-genetic factors linked to neonatal RDS, with a particular emphasis on the genomic aspects of this condition and their implications for treatment choices and the advancing therapeutic approaches centered around RNAs or gene therapy.
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Affiliation(s)
- Mădălina Anciuc-Crauciuc
- Genetics Department, George Emil Palade University of Medicine, Pharmacy, Science, and Technology, 540142 Târgu Mureș, Romania; (M.A.-C.); (C.V.B.)
- Neonatology Department, George Emil Palade University of Medicine, Pharmacy, Science, and Technology, 540142 Târgu Mureș, Romania;
| | - Manuela Camelia Cucerea
- Neonatology Department, George Emil Palade University of Medicine, Pharmacy, Science, and Technology, 540142 Târgu Mureș, Romania;
| | - Florin Tripon
- Genetics Department, George Emil Palade University of Medicine, Pharmacy, Science, and Technology, 540142 Târgu Mureș, Romania; (M.A.-C.); (C.V.B.)
| | - George-Andrei Crauciuc
- Genetics Laboratory, Center for Advanced Medical and Pharmaceutical Research, George Emil Palade University of Medicine, Pharmacy, Science, and Technology, 540139 Târgu Mureș, Romania;
| | - Claudia Violeta Bănescu
- Genetics Department, George Emil Palade University of Medicine, Pharmacy, Science, and Technology, 540142 Târgu Mureș, Romania; (M.A.-C.); (C.V.B.)
- Genetics Laboratory, Center for Advanced Medical and Pharmaceutical Research, George Emil Palade University of Medicine, Pharmacy, Science, and Technology, 540139 Târgu Mureș, Romania;
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Zhang X, Chen Q, Song H, Jiang W, Xie S, Huang J, Kang G. MicroRNA‑375 prevents TGF‑β‑dependent transdifferentiation of lung fibroblasts via the MAP2K6/P38 pathway. Mol Med Rep 2020; 22:1803-1810. [PMID: 32582987 PMCID: PMC7411355 DOI: 10.3892/mmr.2020.11261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 05/27/2020] [Indexed: 02/07/2023] Open
Abstract
Transdifferentiation of lung fibroblasts to myofibroblasts is a crucial pathophysiological process in pulmonary fibrosis. MicroRNA‑375 (miR‑375) was initially identified as a tumor‑suppressive factor, and its expression was negatively associated with the severity of lung cancer; however, its role and potential mechanism in myofibroblast transdifferentiation and pulmonary fibrosis remain unclear. In the present study, human lung fibroblasts were stimulated with transforming growth factor‑β (TGF‑β) to induce myofibroblast transdifferentiation. A mimic and inhibitor of miR‑375, and their negative controls, were used to overexpress or suppress miR‑375 in lung fibroblasts, respectively. The mRNA expression levels of fibrotic markers, and protein expression of α‑smooth muscle actin and periostin, were subsequently detected by reverse transcription‑quantitative PCR and western blotting, to assess myofibroblast transdifferentiation. miR‑375 was markedly upregulated in human lung fibroblasts after TGF‑β stimulation. The miR‑375 mimic alleviated, whereas the miR‑375 inhibitor aggravated TGF‑β‑dependent transdifferentiation of lung fibroblasts. Mechanistically, miR‑375 prevented myofibroblast transdifferentiation and collagen synthesis by blocking the P38 mitogen‑activated protein kinases (P38) pathway, and P38 suppression abrogated the deleterious effect of the miR‑375 inhibitor on myofibroblast transdifferentiation. Furthermore, the present study revealed that mitogen‑activated protein kinase kinase 6 was involved in P38 inactivation by miR‑375. In conclusion, miR‑375 was implicated in modulating TGF‑β‑dependent transdifferentiation of lung fibroblasts, and targeting miR‑375 expression may help to develop therapeutic approaches for treating pulmonary fibrosis.
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Affiliation(s)
- Xinghua Zhang
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Qian Chen
- Department of Oncology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Hengya Song
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Wanli Jiang
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Songping Xie
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Jie Huang
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Ganjun Kang
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
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Li S, Sun Z, Chen T, Pan J, Shen Y, Chen X, Zhou X, Cheng R, Yang Y. The role of miR-431-5p in regulating pulmonary surfactant expression in vitro. Cell Mol Biol Lett 2019; 24:25. [PMID: 30988675 PMCID: PMC6446292 DOI: 10.1186/s11658-019-0150-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 03/20/2019] [Indexed: 12/19/2022] Open
Abstract
Background Pulmonary surfactant is the complex mixture of lipid and protein that covers the alveolar surface. Pulmonary surfactant deficiency is one of the main causes of neonatal respiratory distress. Recent studies showed that miRNA plays an important role in lung development, but research into miR-431 regulation of pulmonary surfactant are sparse. In this study, we explored the regulatory role of miR-431-5p in the expression of pulmonary surfactant and identified its potential target gene, Smad4. Methods The bioinformatics tool TargetScan was used to predict the targets of miR-431. The expression of miR-431-5p was achieved via transfection of miR-431-5p mimics, an miR-431-5p inhibitor and corresponding negative control. The level of miR-431-5p was determined using quantitative real-time PCR. The CCK8 assay was conducted to confirm cell growth 12 h after transfection with miR-431-5p mimics, inhibitor or NC. Smad4 and surfactant-associated proteins in A549 were analyzed using western blot and quantitative real-time PCR. Results Smad4 was validated as a target of miR-431 in A549 cells. Overexpression of miR-431 accelerated A549 proliferation and inhibited A549 apoptosis. The mRNA and protein levels for the surfactant proteins (SP-A, SP-B, SP-C and SP-D) were found to be differentially expressed in A549 cells over- or under-expressing miR-431-5p. Conclusion Our results show that miR-431-5p is critical for pulmonary surfactant expression and that its regulation is closely related to the TGF-β/Smad4 pathway. These results will help us to study the pathophysiological mechanism of lung developmental diseases.
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Affiliation(s)
- Shujun Li
- 1Department of Pediatrics, Children's Hospital of Anhui Medical University, Hefei, China
| | - Zhongyi Sun
- 2Department of Pediatrics, The First Affliated Hospital of Nanjing Medical University, Nanjing, China
| | - Tao Chen
- 3Department of Cardiothoracic Surgery, The First Affliated Hospital of Anhui Medical University, Hefei, China
| | - Jingjing Pan
- 2Department of Pediatrics, The First Affliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yanqing Shen
- 4Department of Neonates, Children's Hospital of Nanjing Medical University, No 72, Guangzhou Road, Nanjing, 210008 China
| | - Xiaoqing Chen
- 2Department of Pediatrics, The First Affliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaoyu Zhou
- 4Department of Neonates, Children's Hospital of Nanjing Medical University, No 72, Guangzhou Road, Nanjing, 210008 China
| | - Rui Cheng
- 4Department of Neonates, Children's Hospital of Nanjing Medical University, No 72, Guangzhou Road, Nanjing, 210008 China
| | - Yang Yang
- 4Department of Neonates, Children's Hospital of Nanjing Medical University, No 72, Guangzhou Road, Nanjing, 210008 China
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Pei H, Hu W, Guo Z, Chen H, Ma J, Mao W, Li B, Wang A, Wan J, Zhang J, Nie J, Zhou G, Hei TK. Long Noncoding RNA CRYBG3 Blocks Cytokinesis by Directly Binding G-Actin. Cancer Res 2018; 78:4563-4572. [PMID: 29934435 PMCID: PMC6095725 DOI: 10.1158/0008-5472.can-18-0988] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 05/23/2018] [Accepted: 06/15/2018] [Indexed: 01/05/2023]
Abstract
The dynamic interchange between monomeric globular actin (G-actin) and polymeric filamentous actin filaments (F-actin) is fundamental and essential to many cellular processes, including cytokinesis and maintenance of genomic stability. Here, we report that the long noncoding RNA LNC CRYBG3 directly binds G-actin to inhibit its polymerization and formation of contractile rings, resulting in M-phase cell arrest. Knockdown of LNC CRYBG3 in tumor cells enhanced their malignant phenotypes. Nucleotide sequence 228-237 of the full-length LNC CRYBG3 and the ser14 domain of β-actin is essential for their interaction, and mutation of either of these sites abrogated binding of LNC CRYBG3 to G-actin. Binding of LNC CRYBG3 to G-actin blocked nuclear localization of MAL, which consequently kept serum response factor (SRF) away from the promoter region of several immediate early genes, including JUNB and Arp3, which are necessary for cellular proliferation, tumor growth, adhesion, movement, and metastasis. These findings reveal a novel lncRNA-actin-MAL-SRF pathway and highlight LNC CRYBG3 as a means to block cytokinesis and to treat cancer by targeting the actin cytoskeleton.Significance: Identification of the long noncoding RNA LNC CRYBG3 as a mediator of microfilament disorganization marks it as a novel therapeutic antitumor strategy. Cancer Res; 78(16); 4563-72. ©2018 AACR.
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Affiliation(s)
- Hailong Pei
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Wentao Hu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Ziyang Guo
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Huaiyuan Chen
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Ji Ma
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Weidong Mao
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Bingyan Li
- Medical College of Soochow University, Suzhou, China
| | - Aiqing Wang
- Medical College of Soochow University, Suzhou, China
| | - Jianmei Wan
- Medical College of Soochow University, Suzhou, China
| | - Jian Zhang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Jing Nie
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Guangming Zhou
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China.
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Tom K Hei
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China.
- Center for Radiological Research, College of Physician and Surgeons, Columbia University, New York, New York
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Zhang YH, Wu LZ, Liang HL, Yang Y, Qiu J, Kan Q, Zhu W, Ma CL, Zhou XY. Pulmonary surfactant synthesis in miRNA-26a-1/miRNA-26a-2 double knockout mice generated using the CRISPR/Cas9 system. Am J Transl Res 2017; 9:355-365. [PMID: 28337265 PMCID: PMC5340672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Accepted: 01/26/2017] [Indexed: 06/06/2023]
Abstract
Pulmonary surfactant (PS), which is synthesized by type II alveolar epithelial cells (AECIIs), maintains alveolar integrity by reducing surface tension. Many premature neonates who lack adequate PS are predisposed to developing respiratory distress syndrome (RDS), one of the leading causes of neonatal morbidity and mortality. PS synthesis is influenced and regulated by various factors, including microRNAs. Previous in vitro studies have shown that PS synthesis is regulated by miR-26a in fetal rat AECIIs. This study aimed to investigate the role of miR-26a in PS synthesis in vivo. To obtain a miR-26a-1/miR-26a-2 double knockout mouse model, we used the clustered regularly interspaced short palindromic repeat/CRISPR-associated protein 9 (CRISPR/Cas9) system, an important genome editing technology. Real-time PCR was performed to determine the miR-26a levels in various organs, as well as the mRNA levels of surfactant-associated proteins. Moreover, AECIIs and surfactant-associated proteins in lung tissues were analyzed by hematoxylin-eosin staining and immunohistochemistry. Homozygous offspring of miR-26a-1/miR-26a-2 double knockout mice generated using the CRISPR/Cas9 system were successfully obtained, and PS synthesis and the number of AECIIs were significantly increased in the miR-26a knockout mice. These results indicate that miR-26a plays an important role in PS synthesis in AECIIs.
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Affiliation(s)
- Ying-Hui Zhang
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Li-Zhi Wu
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Hong-Lu Liang
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Yang Yang
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Jie Qiu
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Qing Kan
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Wen Zhu
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Cheng-Ling Ma
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
| | - Xiao-Yu Zhou
- Department of Neonatology, Children's Hospital of Nanjing Medical University Nanjing 210008, Jiangsu, China
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Yu HR, Li SC, Tseng WN, Tain YL, Chen CC, Sheen JM, Tiao MM, Kuo HC, Huang CC, Hsieh KS, Huang LT. Early and late effects of prenatal corticosteroid treatment on the microRNA profiles of lung tissue in rats. Exp Ther Med 2016; 11:753-762. [PMID: 26997989 PMCID: PMC4774352 DOI: 10.3892/etm.2016.2992] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 11/25/2015] [Indexed: 12/15/2022] Open
Abstract
Glucocorticoids have been administered to mothers at risk of premature delivery to induce maturation of preterm fetal lungs and prevent the development of respiratory distress syndrome. Micro (mi)RNAs serve various crucial functions in cell proliferation, differentiation and organ development; however, few studies have demonstrated an association between miRNAs and lung development. The aim of the present study was to investigate alterations in the miRNA profiles of rat lung tissue following prenatal glucocorticoid therapy for fetal lung development. The differences in miRNA expression profiles were compared between postnatal days 7 (D7) and 120 (D120) rat lung tissues, followed by validation using reverse transcription-quantitative polymerase chain reaction. The miRNA profiles of rat lung tissues following prenatal dexamethasone (DEX) therapy were also investigated. miRNAs with 2-fold changes were selected for further analysis. At D120, 6 upregulated and 6 downregulated miRNAs were detected, compared with D7. Among these differentially expressed miRNAs, miR-101-3p and miR-99b-5p were associated with the lowest and highest expressions of miRNA at D7, respectively. A limited impact on the miRNA profiles of rat lung tissues was observed following prenatal DEX treatment, which may help to further clarify the mechanisms underlying normal lung development. However, the results of the present study cannot entirely elucidate the effects of prenatal DEX treatment on the lung development of premature infants, and further studies investigating the impact of prenatal corticosteroids on fetal lung miRNA profiles are required.
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Affiliation(s)
- Hong-Ren Yu
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Sung-Chou Li
- Genomics and Proteomics Core Laboratory, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Wan-Ning Tseng
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - You-Lin Tain
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Chih-Cheng Chen
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Jiunn-Ming Sheen
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Mao-Meng Tiao
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Ho-Chang Kuo
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Chao-Cheng Huang
- Department of Pathology and Medical Research, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Kai-Sheng Hsieh
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
| | - Li-Tung Huang
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan, R.O.C
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Wang L, Song G, Liu M, Chen B, Chen Y, Shen Y, Zhu J, Zhou X. MicroRNA-375 overexpression influences P19 cell proliferation, apoptosis and differentiation through the Notch signaling pathway. Int J Mol Med 2015; 37:47-55. [PMID: 26531318 PMCID: PMC4687438 DOI: 10.3892/ijmm.2015.2399] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 09/30/2015] [Indexed: 12/20/2022] Open
Abstract
Our previous study reported that microRNA-375 (miR-375) is significantly upregulated in ventricular septal myocardial tissues from 22‑week‑old fetuses with ventricular septal defect as compared with normal controls. In the present study, the specific effects of miR‑375 on P19 cell differentiation into cardiomyocyte‑like cells were investigated. Stable P19 cell lines overexpressing miR‑375 or containing empty vector were established, which could be efficiently induced into cardiomyocyte‑like cells in the presence of dimethyl sulfoxide in vitro. miR‑375 overexpression was verified using reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR). Cell proliferation was determined according to total cell counts; cell cycle distribution and apoptosis levels were examined using flow cytometry. Apoptosis‑related morphological changes were observed using Hoechst staining and fluorescence microscopy. During P19 cell differentiation, the cardiomyogenesis‑related mRNAs (cardiac troponin T, GATA binding protein 4, myocyte‑specific enhancer factor 2C) and mRNAs involved in the Notch signaling pathway (Notch2, Delta‑like 1 and hes family bHLH transcription factor 1) were detected at days 0, 4, 6 and 10. Their differential expression was examined using RT‑qPCR; the apoptosis‑related genes BAX and Bcl‑2 were also detected using this method. The corresponding proteins were evaluated by western blotting. Compared with the control group, miR‑375 overexpression inhibited proliferation but promoted apoptosis in P19 cells, and the associated mRNAs and proteins were decreased during differentiation. miR‑375 has an important role in cardiomyocyte differentiation, and can disrupt this process via the Notch signaling pathway. The present findings contribute to the understanding of the mechanisms of congenital heart disease and facilitate the development of new gene therapies.
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Affiliation(s)
- Lihua Wang
- Department of Neonatology, Nanjing Children's Hospital, Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Guixian Song
- Department of Cardiology, Taizhou People's Hospital, Taizhou, Jiangsu 225300, P.R. China
| | - Ming Liu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Bin Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yumei Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yahui Shen
- Department of Children Health Care, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Jingai Zhu
- Department of Children Health Care, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Xiaoyu Zhou
- Department of Neonatology, Nanjing Children's Hospital, Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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Zhang H, Guo Y, Mishra A, Gou D, Chintagari NR, Liu L. MicroRNA-206 regulates surfactant secretion by targeting VAMP-2. FEBS Lett 2014; 589:172-6. [PMID: 25481410 DOI: 10.1016/j.febslet.2014.11.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 11/13/2014] [Accepted: 11/24/2014] [Indexed: 12/12/2022]
Abstract
Lung surfactant secretion is a highly regulated process. Our previous studies have shown that VAMP-2 is essential for surfactant secretion. In the present study we investigated the role of miR-206 in surfactant secretion through VAMP-2. VAMP-2 was confirmed to be a target of miR-206 by 3'-untranslational region (3'-UTR) luciferase assay. Mutations in the predicated miR-206 binding sites reduced the binding of miR-206 to the 3'-UTR of VAMP-2. miR-206 decreased the expression of VAMP-2 protein and decreased the lung surfactant secretion in alveolar type II cells. In conclusion, miR-206 regulates lung surfactant secretion by limiting the availability of VAMP-2 protein.
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Affiliation(s)
- Honghao Zhang
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, OK 73034, United States
| | - Yujie Guo
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, OK 73034, United States; Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK 73034, United States
| | - Amarjit Mishra
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, OK 73034, United States
| | - Deming Gou
- Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Narendranath Reddy Chintagari
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, OK 73034, United States
| | - Lin Liu
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, OK 73034, United States; Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK 73034, United States.
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Wang Y, Huang C, Reddy Chintagari N, Bhaskaran M, Weng T, Guo Y, Xiao X, Liu L. miR-375 regulates rat alveolar epithelial cell trans-differentiation by inhibiting Wnt/β-catenin pathway. Nucleic Acids Res 2013; 41:3833-44. [PMID: 23396279 PMCID: PMC3616718 DOI: 10.1093/nar/gks1460] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Alveolar epithelial cell (AEC) trans-differentiation is a process where type II alveolar epithelial cells (AEC II) trans-differentiate into type I alveolar epithelial cells (AEC I) during lung recovery after various injuries, in which AEC I are damaged. This process is critical for lung tissue repair. MicroRNAs are a group of small RNAs that regulate gene expression at the post-transcriptional level. They have the potential to regulate almost every aspect of cell physiology. However, whether AEC trans-differentiation is regulated by microRNAs is completely unknown. In this study, we found that miR-375 was downregulated during AEC trans-differentiation. The overexpression of miR-375 with an adenoviral vector inhibited alveolar epithelial trans-differentiation as indicated by an increase in the AEC II marker, surfactant protein C, and decreases in the AEC I markers, T1α and advanced glycosylation end product-specific receptor. miR-375 also inhibited the Wnt/β-catenin pathway. The constitutively activation of Wnt/β-catenin signaling with a stabilized form of β-catenin blocked the miR-375 effects. Frizzled 8 was identified as a target of miR-375. In summary, our results demonstrate that miR-375 regulates AEC trans-differentiation through the Wnt/β-catenin pathway. This discovery may provide new targets for therapeutic intervention to benefit lung recovery from injuries.
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Affiliation(s)
- Yang Wang
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, OK 74078, USA
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Mascaux C, Feser WJ, Lewis MT, Barón AE, Coldren CD, Merrick DT, Kennedy TC, Eckelberger JI, Rozeboom LM, Franklin WA, Minna JD, Bunn PA, Miller YE, Keith RL, Hirsch FR. Endobronchial miRNAs as biomarkers in lung cancer chemoprevention. Cancer Prev Res (Phila) 2013; 6:100-8. [PMID: 23268837 PMCID: PMC4159305 DOI: 10.1158/1940-6207.capr-12-0382] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Lung cancers express lower levels of prostacyclin than normal lung tissues. Prostacyclin prevents lung cancer in a variety of mouse models. A randomized phase II trial comparing oral iloprost (a prostacyclin analog) with placebo in high-risk subjects showed improvement in bronchial histology in former, but not current, smokers. This placebo-controlled study offered the opportunity for investigation of other potential intermediate endpoint and predictive biomarkers to incorporate into chemoprevention trials. Matched bronchial biopsies were obtained at baseline and at 6-month follow-up from 125 high-risk individuals who completed the trial: 31/29 and 37/28 current/former smokers in the iloprost and placebo arm, respectively. We analyzed the expression of 14 selected miRNAs by Real Time PCR in 496 biopsies. The expression of seven miRNAs was significantly correlated with histology at baseline. The expression of miR-34c was inversely correlated with histology at baseline (P < 0.0001) and with change in histology at follow-up (P = 0.0003), independent of treatment or smoking status. Several miRNAs were also found to be differentially expressed in current smokers as compared with former smokers. In current smokers, miR-375 was upregulated at baseline (P < 0.0001) and downregulated after treatment with iloprost (P = 0.0023). No miRNA at baseline reliably predicted a response to iloprost. No biomarker predictive of response to iloprost was found. MiR-34c was inversely correlated with baseline histology and with histology changes. Mir-34c changes at follow-up could be used as a quantitative biomarker that parallels histologic response in formalin-fixed bronchial biopsies in future lung cancer chemoprevention studies.
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Affiliation(s)
- Celine Mascaux
- Department of Medicine, Division of Medical Oncology, Colorado School of Public Health, Aurora, 80045, USA.
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Agassandian M, Mallampalli RK. Surfactant phospholipid metabolism. Biochim Biophys Acta Mol Cell Biol Lipids 2012; 1831:612-25. [PMID: 23026158 DOI: 10.1016/j.bbalip.2012.09.010] [Citation(s) in RCA: 153] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 09/07/2012] [Accepted: 09/16/2012] [Indexed: 12/16/2022]
Abstract
Pulmonary surfactant is essential for life and is composed of a complex lipoprotein-like mixture that lines the inner surface of the lung to prevent alveolar collapse at the end of expiration. The molecular composition of surfactant depends on highly integrated and regulated processes involving its biosynthesis, remodeling, degradation, and intracellular trafficking. Despite its multicomponent composition, the study of surfactant phospholipid metabolism has focused on two predominant components, disaturated phosphatidylcholine that confers surface-tension lowering activities, and phosphatidylglycerol, recently implicated in innate immune defense. Future studies providing a better understanding of the molecular control and physiological relevance of minor surfactant lipid components are needed. This article is part of a Special Issue entitled Phospholipids and Phospholipid Metabolism.
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Affiliation(s)
- Marianna Agassandian
- Department of Medicine, Acute Lung Injury Center of Excellence, the University of Pittsburgh, Pittsburgh, PA 15213, USA
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