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Yaacobi-Artzi S, Kalo D, Roth Z. Effect of the aflatoxins B1 and M1 on bovine oocyte developmental competence and embryo morphokinetics. Reprod Toxicol 2023; 120:108437. [PMID: 37422138 DOI: 10.1016/j.reprotox.2023.108437] [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: 03/19/2023] [Revised: 06/21/2023] [Accepted: 07/04/2023] [Indexed: 07/10/2023]
Abstract
Aflatoxins are considered as reproductive toxins for mammalian species. Here, we studied the effect of aflatoxin B1 (AFB1) and its metabolite aflatoxin M1 (AFM1) on the development and morphokinetics of bovine embryos. Cumulus oocyte complexes (COCs) were matured with AFB1 (0.032, 0.32, 3.2, 32 µM) or AFM1 (0.015, 0.15, 1.5, 15, 60 nM), then fertilized and the putative zygotes were cultured in an incubator equipped with a time-lapse system. Exposing COCs to 32 µM AFB1 or 60 nM AFM1 reduced the cleavage rate, whereas exposing them to 3.2 or 32 µM AFB1 further reduced the blastocyst formation. A delay was recorded for the first and second cleavages in a dose-dependent manner for both AFB1- and AFM1-treated oocytes. A delay was recorded in the third cleavage in the AFM1-treated group. To explore potential mechanisms, subgroups of COCs were examined for nuclear and cytoplasmic maturation (n = 225; DAPI and FITC-PNA, respectively), and mitochondrial function was examined in a stage-dependent manner. COCs were examined for their oxygen consumption rates (n = 875; Seahorse XFp analyzer) at the end of maturation, MII-stage oocytes were examined for their mitochondrial membrane potential (n = 407; JC1), and putative zygotes were examined using a fluorescent time-lapse system (n = 279; IncuCyte). Exposing COCs to AFB1 (3.2 or 32 µM) impaired oocyte nuclear and cytoplasmic maturation and increased mitochondrial membrane potential in the putative zygotes. These alterations were associated with changes in the expression of mt-ND2 (32 µM AFB1) and STAT3 (all AFM1 concentrations) genes in the blastocyst stage, suggesting a carryover effect from the oocyte to the developing embryos.
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Affiliation(s)
- Shira Yaacobi-Artzi
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University, Rehovot 7610000, Israel
| | - Dorit Kalo
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University, Rehovot 7610000, Israel
| | - Zvi Roth
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University, Rehovot 7610000, Israel.
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2
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Qin L, Dong Z, Huang C, Liu H, Beebe J, Subramaniyan B, Hao Y, Liu Y, He Z, Liu JY, Zhang JT. Reversible promoter demethylation of PDGFD confers gemcitabine resistance through STAT3 activation and RRM1 upregulation. Cancer Lett 2023:216266. [PMID: 37321532 DOI: 10.1016/j.canlet.2023.216266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 05/19/2023] [Accepted: 06/06/2023] [Indexed: 06/17/2023]
Abstract
Drug resistance is a major problem in cancer treatment with traditional or targeted therapeutics. Gemcitabine is approved for several human cancers and the first line treatment for locally advanced or metastatic pancreatic ductal adenocarcinoma (PDAC). However, gemcitabine resistance frequently occurs and is a major problem in successful treatments of these cancers and the mechanism of gemcitabine resistance remains largely unknown. In this study, we identified 65 genes that had reversible methylation changes in their promoters in gemcitabine resistant PDAC cells using whole genome Reduced Representation Bisulfite Sequencing analyses. One of these genes, PDGFD, was further studied in detail for its reversible epigenetic regulation in expression and shown to contribute to gemcitabine resistance in vitro and in vivo via stimulating STAT3 signaling in both autocrine and paracrine manners to upregulate RRM1 expression. Analyses of TCGA datasets showed that PDGFD positively associates with poor outcome of PDAC patients. Together, we conclude that the reversible epigenetic upregulation plays an important role in gemcitabine resistance development and targeting PDGFD signaling alleviates gemcitabine resistance for PDAC treatment.
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Affiliation(s)
- Li Qin
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Zizheng Dong
- Department of Cell and Cancer Biology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Caoqinglong Huang
- Department of Cell and Cancer Biology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Hao Liu
- Affiliated Cancer Hospital, Guangzhou Medical University, Guangzhou, 510095, Guangdong, China
| | - Jenny Beebe
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Boopathi Subramaniyan
- Department of Cell and Cancer Biology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Yangyang Hao
- Department of Molecular and Medical Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Yunlong Liu
- Department of Molecular and Medical Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Zhimin He
- Affiliated Cancer Hospital, Guangzhou Medical University, Guangzhou, 510095, Guangdong, China
| | - Jing-Yuan Liu
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Jian-Ting Zhang
- Department of Cell and Cancer Biology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA.
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Targeting the Semaphorin3E-plexinD1 complex in allergic asthma. Pharmacol Ther 2023; 242:108351. [PMID: 36706796 DOI: 10.1016/j.pharmthera.2023.108351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 01/09/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023]
Abstract
Asthma is a heterogenous airway disease characterized by airway inflammation and remodeling. It affects more than 300 million people worldwide and poses a significant burden on society. Semaphorins, discovered initially as neural guidance molecules, are ubiquitously expressed in various organs and regulate multiple signaling pathways. Interestingly, Semaphorin3E is a critical molecule in lung pathophysiology through its role in both lung development and homeostasis. Semaphorin3E binds to plexinD1, mediating regulatory effects on cell migration, proliferation, and angiogenesis. Recent in vitro and in vivo studies have demonstrated that the Semaphorin3E-plexinD1 axis is implicated in asthma, impacting inflammatory and structural cells associated with airway inflammation, tissue remodeling, and airway hyperresponsiveness. This review details the Semaphorin3E-plexinD1 axis in various aspects of asthma and highlights future directions in research including its potential role as a therapeutic target in airway allergic diseases.
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Gong X, Zhu L, Liu J, Li C, Xu Z, Liu J, Zhang H. Exposure to traffic-related fine particulate matter 2.5 causes respiratory damage via peroxisome proliferator-activated receptor gamma-regulated inflammation. ENVIRONMENTAL TOXICOLOGY 2022; 37:2178-2188. [PMID: 35670047 DOI: 10.1002/tox.23584] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 01/25/2022] [Accepted: 02/19/2022] [Indexed: 06/15/2023]
Abstract
Exposure to particulate matter 2.5 (PM2.5) potentially triggers airway inflammation. Peroxisome proliferator-activated receptor gamma (PPARγ) has been reported to regulate inflammatory responses in diverse cell types. Therefore, this work investigated the mechanisms of PPARγ in regulating traffic-related PM2.5-induced airway inflammation. Using the diffusion flame burner soot generation, traffic-related PM2.5 was generated and adsorbed. BALB/c male mice and human bronchial epithelial cells (16-HBE) were exposed to PM2.5 alone or co-treatment with rosiglitazone (RSG), an agonist of PPARγ. To the end of exposure, bronchoalveolar lavage fluid (BALF), venous blood and arterial blood, trachea, bronchus and lung tissues were collected. The levels of IL-1β, IL-6, and IL-17 were detected by ELISA, and the cell types in BALF were counted. Hematoxylin-eosin (H&E) assay were used to analyze the pathological conditions of lung, bronchus, and pulmonary artery. Apoptosis was detected by TUNEL, and PPARγ expression in lung and bronchus was detected by immunohistochemical (IHC) staining. Western Blot was used to detect PPARγ, NF-kB, AP-1 and STAT3 expression in lung and bronchus. The viability was detected by MTT method. PM2.5 exposure caused pathological damage to the lung, bronchus and pulmonary artery tissue, which induced apoptosis of bronchial epithelial cells. PM2.5 exposure caused local inflammation of the whole body and airway. PPARγ expression increased after PM2.5 exposure. PM2.5 exposure regulated the downstream signaling pathways to affect the inflammatory response through PPARγ. Exposure to traffic-related PM2.5 caused respiratory damage via PPARγ-regulated inflammation.
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Affiliation(s)
- Xiaolei Gong
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Limin Zhu
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinlong Liu
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chunxiang Li
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhuoming Xu
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinfen Liu
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haibo Zhang
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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5
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Hassoun D, Rose L, Blanc FX, Magnan A, Loirand G, Sauzeau V. Bronchial smooth muscle cell in asthma: where does it fit? BMJ Open Respir Res 2022; 9:9/1/e001351. [PMID: 36109087 PMCID: PMC9478857 DOI: 10.1136/bmjresp-2022-001351] [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: 06/27/2022] [Accepted: 09/04/2022] [Indexed: 11/04/2022] Open
Abstract
Asthma is a frequent respiratory condition whose pathophysiology relies on altered interactions between bronchial epithelium, smooth muscle cells (SMC) and immune responses. Those leads to classical hallmarks of asthma: airway hyper-responsiveness, bronchial remodelling and chronic inflammation. Airway smooth muscle biology and pathophysiological implication in asthma are now better understood. Precise deciphering of intracellular signalling pathways regulating smooth muscle contraction highlighted the critical roles played by small GTPases of Rho superfamily. Beyond contractile considerations, active involvement of airway smooth muscle in bronchial remodelling mechanisms is now established. Not only cytokines and growth factors, such as fibroblats growth factor or transforming growth factor-β, but also extracellular matrix composition have been demonstrated as potent phenotype modifiers for airway SMC. Although basic science knowledge has grown significantly, little of it has translated into improvement in asthma clinical practice. Evaluation of airway smooth muscle function is still limited to its contractile activity. Moreover, it relies on tools, such as spirometry, that give only an overall assessment and not a specific one. Interesting technics such as forced oscillometry or specific imagery (CT and MRI) give new perspectives to evaluate other aspects of airway muscle such as bronchial remodelling. Finally, except for the refinement of conventional bronchodilators, no new drug therapy directly targeting airway smooth muscle proved its efficacy. Bronchial thermoplasty is an innovative and efficient therapeutic strategy but is only restricted to a small proportion of severe asthmatic patients. New diagnostic and therapeutic strategies specifically oriented toward airway smooth muscle are needed to improve global asthma care.
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Affiliation(s)
- Dorian Hassoun
- Nantes Université, CHU Nantes, CNRS, INSERM, l'institut du thorax, F-44000 Nantes, France
| | - Lindsay Rose
- Nantes Université, CNRS, INSERM, l'institut du thorax, F-44000 Nantes, Pays de la Loire, France
| | - François-Xavier Blanc
- Nantes Université, CHU Nantes, CNRS, INSERM, l'institut du thorax, F-44000 Nantes, France
| | - Antoine Magnan
- INRAe, UMR 0892, Hôpital Foch, Suresnes, France.,Université Versailles-Saint-Quentin-en-Yvelines Paris-Saclay, Versailles, France
| | - Gervaise Loirand
- Nantes Université, CNRS, INSERM, l'institut du thorax, F-44000 Nantes, Pays de la Loire, France
| | - Vincent Sauzeau
- Nantes Université, CNRS, INSERM, l'institut du thorax, F-44000 Nantes, Pays de la Loire, France
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Resveratrol exerts antiproliferative effects on high-glucose-cultured vascular smooth muscle cells via inhibition of STAT3 and upregulation of mitochondrial gene GRIM-19 which is responsible for STAT3 activation. Int J Diabetes Dev Ctries 2022. [DOI: 10.1007/s13410-021-00963-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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7
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Liu Y, Wei L, He C, Chen R, Meng L. Lipoxin A4 inhibits ovalbumin-induced airway inflammation and airway remodeling in a mouse model of asthma. Chem Biol Interact 2021; 349:109660. [PMID: 34537180 DOI: 10.1016/j.cbi.2021.109660] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 08/24/2021] [Accepted: 09/14/2021] [Indexed: 12/19/2022]
Abstract
Asthma is a chronic respiratory disease, which is characterized by airway inflammation, remodeling and airway hyperresponsiveness. Airway remodeling is caused by long-term inflammation of the airways. Lipoxin A4 (LXA4) is a natural eicosanoid with powerful anti-inflammatory properties, and has been shown to serve a critical role in orchestrating pulmonary inflammation and airway hyper-responsiveness in asthmatic mice. However, its effect on airway remodeling is unknown. Female BALB/c mice were used to establish a mouse model of asthma which were sensitized and challenged by ovalbumin (OVA). LXA4 was intranasally administrated prior to the challenge. The results of our study indicated that LXA4 suppressed the OVA-induced inflammatory cell infiltration and T helper type 2 (Th2) cytokines secretion in the mouse model of asthma. Characteristics of airway remodeling, such as thickening of the bronchial wall and smooth muscle, overdeposition of collagen, and overexpression of α-smooth muscle actin (α-SMA) and collagen-I were reversed by LXA4. Furthermore, LXA4 suppressed the aberrant activation of the signal transducer and activator of transcription 3 (STAT3) pathway in the lung tissues of asthmatic mice. In conclusion, these findings demonstrated that LXA4 alleviated allergic airway inflammation and remodeling in asthmatic mice, which may be related to the inhibition of STAT3 pathway.
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Affiliation(s)
- Yuanyuan Liu
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China
| | - Li Wei
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China
| | - Chao He
- Department of Gastrointestinal Surgery, Taian City Central Hospital, Taian, Shandong, China
| | - Ran Chen
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China
| | - Ling Meng
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China.
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8
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Pawlonka J, Rak B, Ambroziak U. The regulation of cyclin D promoters - review. Cancer Treat Res Commun 2021; 27:100338. [PMID: 33618151 DOI: 10.1016/j.ctarc.2021.100338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/06/2021] [Accepted: 02/15/2021] [Indexed: 11/25/2022]
Abstract
Cyclins are key regulators of cell cycle progression and survival. Particularly cyclins D (cyclin D1, D2, and D3) act in response to the mitogenic stimulation and are pivotal mediators between proliferative pathways and the nuclear cell cycle machinery. Dysregulation of cyclins expression results in impaired development, abnormal cell growth or tumorigenesis. In this review we summarize current knowledge about regulatory role of the cyclin D promoters, transcriptional factors: regulators, co-activators and adaptor proteins necessary to their activation. We focused on the intracellular signaling pathways vital to cell growth, differentiation and apoptosis including transcription factor families: activator protein 1 (AP1), nuclear factor (NFκB), signal transducer and activator of transcription (STAT), cAMP response element-binding protein (CREB) and Sp/NF-Y, with a special insight into the tissue specific cyclin representation.
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Affiliation(s)
- Jan Pawlonka
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw
| | - Beata Rak
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw; Department of Genomic Medicine, Medical University of Warsaw, Warsaw.
| | - Urszula Ambroziak
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw
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9
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Dilasser F, Rose L, Hassoun D, Klein M, Rousselle M, Brosseau C, Guignabert C, Taillé C, Dombret MC, Di Candia L, Heddebaut N, Bouchaud G, Pretolani M, Magnan A, Loirand G, Sauzeau V. Essential role of smooth muscle Rac1 in severe asthma-associated airway remodelling. Thorax 2021; 76:326-334. [PMID: 33542087 PMCID: PMC7982925 DOI: 10.1136/thoraxjnl-2020-216271] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/20/2020] [Accepted: 12/02/2020] [Indexed: 12/15/2022]
Abstract
Background Severe asthma is a chronic lung disease characterised by inflammation, airway hyperresponsiveness (AHR) and airway remodelling. The molecular mechanisms underlying uncontrolled airway smooth muscle cell (aSMC) proliferation involved in pulmonary remodelling are still largely unknown. Small G proteins of the Rho family (RhoA, Rac1 and Cdc42) are key regulators of smooth muscle functions and we recently demonstrated that Rac1 is activated in aSMC from allergic mice. The objective of this study was to assess the role of Rac1 in severe asthma-associated airway remodelling. Methods and results Immunofluorescence analysis in human bronchial biopsies revealed an increased Rac1 activity in aSMC from patients with severe asthma compared with control subjects. Inhibition of Rac1 by EHT1864 showed that Rac1 signalling controlled human aSMC proliferation induced by mitogenic stimuli through the signal transducer and activator of transcription 3 (STAT3) signalling pathway. In vivo, specific deletion of Rac1 in SMC or pharmacological inhibition of Rac1 by nebulisation of NSC23766 prevented AHR and aSMC hyperplasia in a mouse model of severe asthma. Moreover, the Rac1 inhibitor prevented goblet cell hyperplasia and epithelial cell hypertrophy whereas treatment with corticosteroids had less effect. Nebulisation of NSC23766 also decreased eosinophil accumulation in the bronchoalveolar lavage of asthmatic mice. Conclusion This study demonstrates that Rac1 is overactive in the airways of patients with severe asthma and is essential for aSMC proliferation. It also provides evidence that Rac1 is causally involved in AHR and airway remodelling. Rac1 may represent as an interesting target for treating both AHR and airway remodelling of patients with severe asthma.
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Affiliation(s)
| | | | | | | | | | - Carole Brosseau
- Centre de recherche en transplantation, Inserm 1064, Nantes, France
| | | | - Camille Taillé
- Service de Pneumologie et Centre de Référence des Maladies Pulmonaires Rares, Hôpital Bichat - Claude-Bernard, Paris, France
| | | | - Leonarda Di Candia
- Service de Pneumologie et Centre de Référence des Maladies Pulmonaires Rares, Hôpital Bichat - Claude-Bernard, Paris, France
| | | | | | | | - Antoine Magnan
- Institut du Thorax UMR1087 CNRS 6291, INSERM, Université de Nantes, CHU de Nantes, DHU2020, Nantes, France
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10
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Razavi ZS, Tajiknia V, Majidi S, Ghandali M, Mirzaei HR, Rahimian N, Hamblin MR, Mirzaei H. Gynecologic cancers and non-coding RNAs: Epigenetic regulators with emerging roles. Crit Rev Oncol Hematol 2020; 157:103192. [PMID: 33290823 DOI: 10.1016/j.critrevonc.2020.103192] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 12/24/2022] Open
Abstract
Gynecologic cancers involve the female genital organs, such as the vulva, vagina, cervix, endometrium, ovaries, and fallopian tubes. The occurrence and frequency of gynecologic cancer depends on personal lifestyle, history of exposure to viruses or carcinogens, genetics, body shape, and geographical habitat. For a long time, research into the molecular biology of cancer was broadly restricted to protein-coding genes. Recently it has been realized that non-coding RNAs (ncRNA), including long noncoding RNAs (LncRNAs), microRNAs, circular RNAs and piRNAs (PIWI-interacting RNAs), can all play a role in the regulation of cellular function within gynecological cancer. It is now known that ncRNAs are able to play dual roles, i.e. can exert both oncogenic or tumor suppressive functions in gynecological cancer. Moreover, several clinical trials are underway looking at the biomarker and therapeutic roles of ncRNAs. These efforts may provide a new horizon for the diagnosis and treatment of gynecological cancer. Herein, we summarize some of the ncRNAs that have been shown to be important in gynecological cancers.
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Affiliation(s)
| | - Vida Tajiknia
- Department of Surgery, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Shahab Majidi
- Student Research Committee, Fasa University of Medical Sciences, Fasa, Iran
| | - Maryam Ghandali
- School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Hamid Reza Mirzaei
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Neda Rahimian
- Endocrine Research Center, Institute of Endocrinology and Metabolism, Iran University of Medical Sciences (IUMS), Tehran, Iran.
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA, 02115, USA; Laser Research Centre, Faculty of Health Science, University of Johannesburg, Doornfontein, 2028, South Africa.
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
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Tang HX, Qin XP, Li J. Role of the signal transducer and activator of transcription 3 protein in the proliferation of vascular smooth muscle cells. Vascular 2020; 28:821-828. [PMID: 32486969 DOI: 10.1177/1708538120929504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Cardiovascular disease (CVD) remains the primary cause of morbidity and mortality worldwide. The abnormal proliferation of vascular smooth muscle cells (VSMCs) is a key event in the pathogenesis of CVD. The functional and phenotypic changes in vascular cells are mediated by complex signaling cascades that initiate and control genetic reprogramming. Many studies have demonstrated that signal transducer and activator of transcription 3 (STAT3) regulates a diverse array of functions relevant to atherosclerosis. METHODS In this review, we summarize the studies on the STAT3-mediated proliferation of VSMCs and subsequent CVDs such as hypertension, atherosclerosis, stroke, coronary artery disease, and myocardial infarction. Furthermore, we describe the general background of STAT3, its structure, function and regulation as well as the STAT3 signaling pathway. Finally, we highlight some potential issues and propose some solutions to these issues.Results and conclusions: STAT3 activation promotes the proliferation of VSMCs by regulating the transcription of genes. Studying the mechanism of VSMC proliferation induced by the STAT3 pathway is valuable for finding therapeutic targets for CVD.
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Affiliation(s)
- Hong-Xia Tang
- The First People's Hospital of Chenzhou, Institute of Pharmacy and Pharmacology, University of South China, Hunan, China
| | - Xu-Ping Qin
- The First People's Hospital of Chenzhou, Institute of Pharmacy and Pharmacology, University of South China, Hunan, China
| | - Jie Li
- The First People's Hospital of Chenzhou, Institute of Pharmacy and Pharmacology, University of South China, Hunan, China
- School of Pharmacy, Southern Medical University, Guangdong, China
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12
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Zhao L, Shi X, Wang N, Liu C, Wang J. YAP1, targeted by miR-375, enhanced the pro-angiogenesis of airway smooth muscle cells in asthma via STAT3 activation. Cell Cycle 2020; 19:1275-1284. [PMID: 32308108 DOI: 10.1080/15384101.2020.1746874] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
YAP1 was previously reported to regulate the development of multiple tumors, angiogenesis included. Angiogenesis was a specific process of remodeling in asthma. In a recent study, YAP1 was correlated with the progression of asthma. However, the role of YAP1 in airway smooth muscle cell and the asthmatic airway angiogenesis was unclear. In the present study, we used cytokine-stimulated airway smooth muscle cells as asthma cell model in vitro. The results showed a significant up-regulation of YAP1 in asthmatic airway smooth muscle tissue and cytokine-stimulated asthmatic cell model by Western blot. The experimental results of YAP1 loss-of-function combined with STAT3 inhibitor (WP1066) showed that YAP1 knockdown inhibited the expression of VEGF by deactivating STAT3 in cytokine-stimulated ASM cells, which hindered the pro-angiogenesis ability of ASM cells. Besides, by combining prediction and binding site mutation along with luciferase reporter gene experiments, we confirmed direct binding between miR-375 and YAP1. Based on that, the decreased expression level of miR-375 was found to be correlated with the pathogenesis of asthma. Finally, miR-375 was verified to participate in the YAP1-regulated pro-angiogenesis ability of ASM cells. To sum up, we provided the evidence that YAP1 directly binds to miR-375 and takes part in the regulation of the pro-angiogenic ability of ASM cells by activating STAT3 and VEGF signaling.
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Affiliation(s)
- Long Zhao
- Department of Respiratory and Asthma, Xi'an Children's Hospital , Xi'an, Shanxi, China
| | - Xiaolan Shi
- Department of Respiratory and Asthma, Xi'an Children's Hospital , Xi'an, Shanxi, China
| | - Ning Wang
- Department of Respiratory and Asthma, Xi'an Children's Hospital , Xi'an, Shanxi, China
| | - Cuicui Liu
- Department of Respiratory and Asthma, Xi'an Children's Hospital , Xi'an, Shanxi, China
| | - Jing Wang
- Department of Respiratory and Asthma, Xi'an Children's Hospital , Xi'an, Shanxi, China
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13
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Baarsma HA, Han B, Poppinga WJ, Driessen S, Elzinga CRS, Halayko AJ, Meurs H, Maarsingh H, Schmidt M. Disruption of AKAP-PKA Interaction Induces Hypercontractility With Concomitant Increase in Proliferation Markers in Human Airway Smooth Muscle. Front Cell Dev Biol 2020; 8:165. [PMID: 32328490 PMCID: PMC7160303 DOI: 10.3389/fcell.2020.00165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 02/28/2020] [Indexed: 01/11/2023] Open
Abstract
With the ability to switch between proliferative and contractile phenotype, airway smooth muscle (ASM) cells can contribute to the progression of airway diseases such as asthma and chronic obstructive pulmonary disease (COPD), in which airway obstruction is associated with ASM hypertrophy and hypercontractility. A-kinase anchoring proteins (AKAPs) have emerged as important regulatory molecules in various tissues, including ASM cells. AKAPs can anchor the regulatory subunits of protein kinase A (PKA), and guide cellular localization via various targeting domains. Here we investigated whether disruption of the AKAP-PKA interaction, by the cell permeable peptide stearated (st)-Ht31, alters human ASM proliferation and contractility. Treatment of human ASM with st-Ht31 enhanced the expression of protein markers associated with cell proliferation in both cultured cells and intact tissue, although this was not accompanied by an increase in cell viability or cell-cycle progression, suggesting that disruption of AKAP-PKA interaction on its own is not sufficient to drive ASM cell proliferation. Strikingly, st-Ht31 enhanced contractile force generation in human ASM tissue with concomitant upregulation of the contractile protein α-sm-actin. This upregulation of α-sm-actin was independent of mRNA stability, transcription or translation, but was dependent on proteasome function, as the proteasome inhibitor MG-132 prevented the st-Ht31 effect. Collectively, the AKAP-PKA interaction appears to regulate markers of the multi-functional capabilities of ASM, and this alter the physiological function, such as contractility, suggesting potential to contribute to the pathophysiology of airway diseases.
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Affiliation(s)
- Hoeke A Baarsma
- Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Bing Han
- Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Wilfred J Poppinga
- Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Saskia Driessen
- Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands
| | - Carolina R S Elzinga
- Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands
| | - Andrew J Halayko
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB, Canada
| | - Herman Meurs
- Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Harm Maarsingh
- Department of Pharmaceutical Sciences, Lloyd L. Gregory School of Pharmacy, Palm Beach Atlantic University, West Palm Beach, FL, United States
| | - Martina Schmidt
- Department of Molecular Pharmacology, University of Groningen, Groningen, Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
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14
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Yap HM, Israf DA, Harith HH, Tham CL, Sulaiman MR. Crosstalk Between Signaling Pathways Involved in the Regulation of Airway Smooth Muscle Cell Hyperplasia. Front Pharmacol 2019; 10:1148. [PMID: 31649532 PMCID: PMC6794426 DOI: 10.3389/fphar.2019.01148] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 09/06/2019] [Indexed: 12/14/2022] Open
Abstract
Increased ASM mass, primarily due to ASM hyperplasia, has been recognized as a hallmark of airway remodeling in asthma. Increased ASM mass is the major contributor to the airway narrowing, thus worsening the bronchoconstriction in response to stimuli. Inflammatory mediators and growth factors released during inflammation induce increased ASM mass surrounding airway wall via increased ASM proliferation, diminished ASM apoptosis and increased ASM migration. Several major pathways, such as MAPKs, PI3K/AKT, JAK2/STAT3 and Rho kinase, have been reported to regulate these cellular activities in ASM and were reported to be interrelated at certain points. This article aims to provide an overview of the signaling pathways/molecules involved in ASM hyperplasia as well as the mapping of the interplay/crosstalk between these major pathways in mediating ASM hyperplasia. A more comprehensive understanding of the complexity of cellular signaling in ASM cells will enable more specific and safer drug development in the control of asthma.
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Affiliation(s)
- Hui Min Yap
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Daud Ahmad Israf
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Hanis Hazeera Harith
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Chau Ling Tham
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Mohd Roslan Sulaiman
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
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15
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Xiang DN, Feng YF, Wang J, Zhang X, Shen JJ, Zou R, Yuan YZ. Platelet-derived growth factor-BB promotes proliferation and migration of retinal microvascular pericytes by up-regulating the expression of C-X-C chemokine receptor types 4. Exp Ther Med 2019; 18:4022-4030. [PMID: 31611940 PMCID: PMC6781788 DOI: 10.3892/etm.2019.8016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 08/16/2019] [Indexed: 12/16/2022] Open
Abstract
Stromal cell-derived growth factor (SDF)-1α acts as a ligand to C-X-C chemokine receptors 4 (CXCR4) and 7 (CXCR7), which are involved in the formation of choroidal neovascularization. Previous studies have demonstrated crosstalk between the platelet-derived growth factor (PDGF)-BB/PDGF receptor (PDGFR)-β and SDF-1α/CXCR4 axes during tumor neovascularization by increasing the recruitment of pericytes. However, the effects of interactions between these two signaling pathways in retinal microvascular pericytes remain poorly understood. Western blotting and reverse transcription-quantitative PCR were used to measure CXCR4 and CXCR7 expression in PDGF-BB-treated pericytes, whilst Cell Counting Kit-8 and Transwell migration assays were used to investigate cell viability and migration following PDGF-BB pretreatment on SDF-1α-treated pericytes. Exogenous PDGF-BB enhanced CXCR4 and CXCR7 expression through PDGFR-β in a dose- and time-dependent manners. In addition, PDGF-BB increased cell viability and migration in SDF-1α-treated pericytes, which were inhibited by AMD3100 and niclosamide, inhibitors for CXCR4 and STAT3 respectively. Crosstalk between PDGF-BB/PDGFR-β and SDF-1α/CXCR4/CXCR7 were involved in the JAK2/STAT3 signaling pathway. PDGF-BB treatment enhanced CXCR4, CXCR7 and PDGFR-βexpression, which may be associated with the phosphorylation of STAT3. siRNA-PDGFR-β transfection reduced CXCR4 and CXCR7 expression in pericytes. Therefore, PDGF-BB directly targets PDGFR-β and serves an important role in regulating CXCR4 and CXCR7 expression, ultimately affecting viability and migration in SDF-1α-treated pericytes. Therefore, targeting CXCR4/CXCR7 may serve as a potential therapeutic strategy for fundus diseases.
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Affiliation(s)
- Dan-Ni Xiang
- Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P.R. China
| | - Yi-Fan Feng
- Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P.R. China
| | - Jing Wang
- Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P.R. China
| | - Xi Zhang
- Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P.R. China
| | - Jing-Jing Shen
- Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P.R. China
| | - Rong Zou
- Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P.R. China
| | - Yuan-Zhi Yuan
- Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P.R. China
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16
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Kalo D, Vitorino Carvalho A, Archilla C, Duranthon V, Moroldo M, Levin Y, Kupervaser M, Smith Y, Roth Z. Mono(2-ethylhexyl) phthalate (MEHP) induces transcriptomic alterations in oocytes and their derived blastocysts. Toxicology 2019; 421:59-73. [DOI: 10.1016/j.tox.2019.04.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/27/2019] [Accepted: 04/29/2019] [Indexed: 12/16/2022]
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17
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Chen Y, Qiao L, Zhang Z, Hu G, Zhang J, Li H. Let-7a inhibits proliferation and promotes apoptosis of human asthmatic airway smooth muscle cells. Exp Ther Med 2019; 17:3327-3334. [PMID: 30988708 PMCID: PMC6447815 DOI: 10.3892/etm.2019.7363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 12/13/2018] [Indexed: 12/18/2022] Open
Abstract
The present study aimed to examine the changes of let-7a expression in asthmatic airway smooth muscle cells (ASMCs) and to analyze its effect on the proliferation and apoptosis of ASMCs, as well as the potential mechanism of action. Let-7a expression levels in ASMCs from asthmatic and non-asthmatic subjects were detected using reverse transcription-quantitative polymerase chain reaction (RT-qPCR) analysis. Furthermore, let-7a mimics were transfected in vitro into ASMCs isolated from asthmatic patients, and the effect of let-7a on ASMC proliferation was examined using a Cell Counting Kit-8. In addition, the influence of let-7a on ASMC apoptosis was detected using flow cytometry and a caspase-3/7 activity assay. Target genes of let-7a were predicted using bioinformatics software, and the direct regulatory effect of let-7a on the potential target gene signal transducer and activator of transcription 3 (STAT3) was verified through a dual-luciferase reporter gene assay combined with RT-qPCR and western blot analysis. The results demonstrated that let-7a expression was significantly lower in ASMCs of asthmatic subjects compared with that in ASMCs of normal subjects. Furthermore, upregulation of let-7a expression in asthmatic ASMCs markedly inhibited cell proliferation and promoted cell apoptosis. The results of the dual-luciferase reporter gene assay indicated that let-7a selectively binds with the 3′-untranslated region of the STAT3 mRNA. In addition, let-7a mimics evidently reduced the mRNA and protein expression levels of STAT3 in asthmatic ASMCs. In conclusion, the present study demonstrates that let-7a expression is downregulated in ASMCs from asthmatic patients. Furthermore, let-7a suppresses the proliferation and promotes apoptosis of human asthmatic ASMCs, which may, at least partially, be associated with the downregulation of STAT3 expression.
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Affiliation(s)
- Yan Chen
- Department of Critical Care Medicine, Shengli Oilfield Center Hospital, Dongying, Shandong 257000, P.R. China
| | - Lujun Qiao
- Department of Critical Care Medicine, Shengli Oilfield Center Hospital, Dongying, Shandong 257000, P.R. China
| | - Zewen Zhang
- Department of Respiratory Disease, Qianfoshan Hospital, Shandong University, Jinan, Shandong 250014, P.R. China
| | - Guoxin Hu
- Department of Critical Care Medicine, Shengli Oilfield Center Hospital, Dongying, Shandong 257000, P.R. China
| | - Jian Zhang
- Department of Critical Care Medicine, Shengli Oilfield Center Hospital, Dongying, Shandong 257000, P.R. China
| | - Hongjia Li
- Department of Respiratory Disease, Qianfoshan Hospital, Shandong University, Jinan, Shandong 250014, P.R. China
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18
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Zhao X, Cheng Z, Wang J. Long Noncoding RNA FEZF1-AS1 Promotes Proliferation and Inhibits Apoptosis in Ovarian Cancer by Activation of JAK-STAT3 Pathway. Med Sci Monit 2018; 24:8088-8095. [PMID: 30416194 PMCID: PMC6243867 DOI: 10.12659/msm.911194] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Long noncoding RNAs (lncRNAs) have been acknowledged as important regulators in human cancers, including ovarian cancer. Several reports identified lncRNA FEZF1-AS1 as an oncogene in gastric cancer, colorectal carcinoma, and non-small cell lung cancer (NSCLC). However, the function of FEZF1-AS1 in ovarian cancer remains largely unknown. This study was aimed to investigate the role of FEZF1-AS1 in ovarian cancer. MATERIAL AND METHODS FEZF1-AS1 expression levels in pairs of ovarian cancer tissues and adjacent normal tissues were measured by quantitative real-time polymerase chain reaction (qRT-PCR). Kaplan-Meier curve analysis was used to determine the correlation between FEZF1-AS1 expression and prognosis in ovarian cancer patients. The effects of FEZF1-AS1 knockdown on ovarian cancer cell proliferation, cell-cycle, and apoptosis were analyzed by Cell Counting Kit-8 (CCK8) and Fluorescence activated Cell Sorting (FACS) assays. Western blot was utilized to assess the effect of FEZF1-AS1 on the activation of JAK-STAT3 pathway. RESULTS FEZF1-AS1 was overexpressed in ovarian cancer tissues compared to adjacent normal tissues. Consistently, FEZF1-AS1 expression was also upregulated in ovarian cancer cell lines compared with normal cell line. Furthermore, higher expression of FEZF1-AS1 in ovarian cancer patients contributed to poorer prognosis. FEZF1-AS1 knockdown significantly suppressed the proliferation and promoted apoptosis in ovarian cancer cells. In mechanism, FEZF1-AS1 regulated activation of JAK-STAT3 signaling pathway by modulating STAT3 phosphorylation. Knockdown of FEZF1-AS1 significantly impaired the phosphorylation of STAT3. CONCLUSIONS Our study demonstrated that FEZF1-AS1 exerted an oncogenic role in ovarian cancer via modulating JAK-STAT3 pathway.
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Affiliation(s)
- Xia Zhao
- Department of Obstetrics and Gynecology, The People's Hospital of Zhangqiu District, Jinan, Shandong, China (mainland)
| | - Zhaofang Cheng
- Department of Obstetrics and Gynecology, The People's Hospital of Zhangqiu District, Jinan, Shandong, China (mainland)
| | - Jian Wang
- Department of Obstetrics and Gynaecology, Zaozhuang Municipal Hospital, Zaozhuang, Shandong, China (mainland)
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19
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The geranyl acetophenone tHGA attenuates human bronchial smooth muscle proliferation via inhibition of AKT phosphorylation. Sci Rep 2018; 8:16640. [PMID: 30413753 PMCID: PMC6226528 DOI: 10.1038/s41598-018-34847-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 10/17/2018] [Indexed: 12/27/2022] Open
Abstract
Increased airway smooth muscle (ASM) mass is a prominent hallmark of airway remodeling in asthma. Inhaled corticosteroids and long-acting beta2-agonists remain the mainstay of asthma therapy, however are not curative and ineffective in attenuating airway remodeling. The geranyl acetophenone 2,4,6-trihydroxy-3-geranyl acetophenone (tHGA), an in-house synthetic non-steroidal compound, attenuates airway hyperresponsiveness and remodeling in murine models of asthma. The effect of tHGA upon human ASM proliferation, migration and survival in response to growth factors was assessed and its molecular target was determined. Following serum starvation and induction with growth factors, proliferation and migration of human bronchial smooth muscle cells (hBSMCs) treated with tHGA were significantly inhibited without any significant effects upon cell survival. tHGA caused arrest of hBSMC proliferation at the G1 phase of the cell cycle with downregulation of cell cycle proteins, cyclin D1 and diminished degradation of cyclin-dependent kinase inhibitor (CKI), p27Kip1. The inhibitory effect of tHGA was demonstrated to be related to its direct inhibition of AKT phosphorylation, as well as inhibition of JNK and STAT3 signal transduction. Our findings highlight the anti-remodeling potential of this drug lead in chronic airway disease.
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20
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Huang Y, Xie Y, Jiang H, Abel PW, Panettieri RA, Casale TB, Tu Y. Upregulated P-Rex1 exacerbates human airway smooth muscle hyperplasia in asthma. J Allergy Clin Immunol 2018; 143:778-781.e5. [PMID: 30312708 DOI: 10.1016/j.jaci.2018.09.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 09/06/2018] [Accepted: 09/28/2018] [Indexed: 02/08/2023]
Affiliation(s)
- Yapei Huang
- Department of Pharmacology, Creighton University School of Medicine, Omaha, Neb
| | - Yan Xie
- Department of Pharmacology, Creighton University School of Medicine, Omaha, Neb
| | - Haihong Jiang
- Department of Pharmacology, Creighton University School of Medicine, Omaha, Neb
| | - Peter W Abel
- Department of Pharmacology, Creighton University School of Medicine, Omaha, Neb
| | - Reynold A Panettieri
- Rutgers Institute for Translational Medicine and Science, Rutgers Biomedical and Health Sciences, Rutgers University, New Brunswick, NJ
| | - Thomas B Casale
- Department of Internal Medicine, University of South Florida School of Medicine, Tampa, Fla.
| | - Yaping Tu
- Department of Pharmacology, Creighton University School of Medicine, Omaha, Neb.
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21
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Shi S, Jin L, Zhang S, Li H, Zhang B, Sun M. MicroRNA-590-5p represses proliferation of human fetal airway smooth muscle cells by targeting signal transducer and activator of transcription 3. Arch Med Sci 2018; 14:1093-1101. [PMID: 30154893 PMCID: PMC6111361 DOI: 10.5114/aoms.2018.74538] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 02/07/2018] [Indexed: 01/18/2023] Open
Abstract
INTRODUCTION Pediatric asthma has remained a health threat to children in recent years. The abnormal proliferation of airway smooth muscle (ASM) cells contributes to airway remodeling during development of asthma. MicroRNAs (miRNAs) are critical regulators of ASM cell proliferation during airway remodeling. miR-590-5p has been reported to regulate cell proliferation in various cell types. However, it remains unclear whether miR-590-5p regulates ASM cell proliferation. In this study, we aimed to investigate the potential role of miR-590-5p in regulating fetal ASM cell proliferation in vitro stimulated by platelet-derived growth factor (PDGF). MATERIAL AND METHODS miRNA, mRNA, and protein expression was detected by real-time quantitative polymerase chain reaction and western blot. Cell proliferation was detected by CCK-8 and BrdU assays. The target of miR-590-5p was confirmed by dual-luciferase reporter assay. RESULTS MiR-590-5p expression was significantly down-regulated in fetal ASM cells stimulated with PDGF (p < 0.05). Overexpression of miR-590-5p inhibited cell proliferation (p < 0.05), whereas the suppression of miR-590-5p promoted cell proliferation of fetal ASM cells stimulated with PDGF (p < 0.05). Signal transducer and activator of transcription 3 (STAT3) was identified as a target gene of miR-590-5p. In addition, miR-590-5p negatively regulated STAT3 expression (p < 0.05). Moreover, miR-590-5p also modulated downstream genes of STAT3 including cyclin D3 and p27 (p < 0.05). The restoration of STAT3 significantly reversed the inhibitory effect of miR-590-5p on fetal ASM cell proliferation. CONCLUSIONS MiR-590-5p inhibits proliferation of fetal ASM cells by down-regulating STAT3, thereby suggesting a novel therapeutic target for the treatment of pediatric asthma.
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Affiliation(s)
- Shan Shi
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Lianhua Jin
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Sai Zhang
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Haibo Li
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Bo Zhang
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Meihua Sun
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, China
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22
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Hastie AT, Steele C, Dunaway CW, Moore WC, Rector BM, Ampleford E, Li H, Denlinger LC, Jarjour N, Meyers DA, Bleecker ER. Complex association patterns for inflammatory mediators in induced sputum from subjects with asthma. Clin Exp Allergy 2018. [PMID: 29520864 DOI: 10.1111/cea.13129] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND The release of various inflammatory mediators into the bronchial lumen is thought to reflect both the type and degree of airway inflammation, eosinophilic Th2, and Th9, or neutrophilic Th1, and Th17, in patients with asthma. AIMS We investigated whether cytokines and chemokines differed in sputum from subjects with more severe compared with milder asthma and whether unbiased factor analysis of cytokine and chemokine groupings indicates specific inflammatory pathways. METHODS Cell-free supernatants from induced sputum were obtained from subjects with a broad range of asthma severity (n = 158) and assessed using Milliplex® Cytokines/Chemokine kits I, II and III, measuring 75 individual proteins. Each cytokine, chemokine or growth factor concentration was examined for differences between asthma severity groups, for association with leucocyte counts, and by factor analysis. RESULTS Severe asthma subjects had 9 increased and 4 decreased proteins compared to mild asthma subjects and fewer differences compared to moderate asthma. Twenty-six mediators were significantly associated with an increasing single leucocyte type: 16 with neutrophils (3 interleukins [IL], 3 CC chemokines, 4 CXC chemokines, 4 growth factors, TNF-α and CX3CL1/Fractalkine); 5 with lymphocytes (IL-7, IL-16, IL-23, IFN-α2 and CCL4/MIP1β); IL-15 and CCL15/MIP1δ with macrophages; IL-5 with eosinophils; and IL-4 and TNFSF10/TRAIL with airway epithelial cells. Factor analysis grouped 43 cytokines, chemokines and growth factors which had no missing data onto the first 10 factors, containing mixes of Th1, Th2, Th9 and Th17 inflammatory and anti-inflammatory proteins. CONCLUSIONS Sputum cytokines, chemokines and growth factors were increased in severe asthma, primarily with increased neutrophils. Factor analysis identified complex inflammatory protein interactions, suggesting airway inflammation in asthma is characterized by overlapping immune pathways. Thus, focus on a single specific inflammatory mediator or pathway may limit understanding the complexity of inflammation underlying airway changes in asthma and selection of appropriate therapy.
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Affiliation(s)
- A T Hastie
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy and Immunology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - C Steele
- Lung Immunology of Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - C W Dunaway
- Lung Immunology of Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - W C Moore
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy and Immunology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - B M Rector
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy and Immunology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - E Ampleford
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy and Immunology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - H Li
- University of Arizona College of Medicine, Tucson, AZ, USA
| | - L C Denlinger
- Department of Medicine, University of Wisconsin, Madison, WI, USA
| | - N Jarjour
- Department of Medicine, University of Wisconsin, Madison, WI, USA
| | - D A Meyers
- University of Arizona College of Medicine, Tucson, AZ, USA
| | - E R Bleecker
- University of Arizona College of Medicine, Tucson, AZ, USA
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Casticin inhibits PDGF-induced proliferation and migration of airway smooth muscle cells. Eur J Pharmacol 2018; 830:39-46. [PMID: 29665364 DOI: 10.1016/j.ejphar.2018.04.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/13/2018] [Accepted: 04/13/2018] [Indexed: 01/04/2023]
Abstract
Casticin (3', 5-dihydroxy-3, 4', 6, 7-tetramethoxyflavone), one of the main components from Vitex rotundifolia L., was reported to possess several pharmacological properties, including anti-inflammatory, hepatoprotective, anticancer, anti-asthma activities. However, the effects of casticin on airway smooth muscle cells (ASMCs) proliferation and migration have not been explored. This study aimed to evaluate the effects of casticin on the proliferation and migration of ASMCs, and study the possible molecular mechanism. Our results demonstrated that casticin significantly suppressed the proliferation and migration of ASMCs exposed to platelet-derived growth factor (PDGF), as well as reversed the PDGF-induced inhibition of the expression of contractile phenotype markers in ASMCs. In addition, casticin also inhibited PDGF-induced the expression of type I collagen and fibronectin in ASMCs induced by PDGF. Furthermore, casticin significantly prevented the activation of ERK1/2 and NF-κB pathways in PDGF-stimulated ASMCs. Taken together, these data demonstrated that casticin inhibits PDGF-induced human ASMC proliferation and migration through suppressing the activation of ERK1/2 and NF-κB signaling pathways.
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Hypoxia and Local Inflammation in Pulmonary Artery Structure and Function. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 967:325-334. [PMID: 29047096 DOI: 10.1007/978-3-319-63245-2_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Hypoxia is recognized as a contributor to pulmonary vascular diseases such as pulmonary hypertension. Hypoxia-induced inflammatory changes can enhance structural and functional changes in pulmonary artery (PA) in the context of PH. Accordingly, understanding how hypoxia and inflammation are linked in the context of pulmonary artery structure and function could be relevant towards development of novel therapies for PH. In this regard, factors such as thymic stromal lymphopoietin (TSLP), an inflammatory cytokine, and brain-derived neurotrophic factor (BDNF), a neurotrophin, have been found critical for nonvascular systems such as airway and asthma. While TSLP canonically affects the immune system, in nonvascular systems, noncanonical effects such as altered [Ca2+]i and cell proliferation have been noted: aspects also relevant to the PA, where there is currently little to no data. Similarly, better known in the nervous system, there is increasing evidence that BDNF is locally produced by structural cells of the airway and can contribute to asthma pathophysiology. In this chapter, we summarize the potential relevance of factors such as TSLP and BDNF to the PA and in the context of hypoxia influences towards development of PH. We focus on cell sources and targets such as PA endothelial cells (PAECs) and smooth muscle cells (PASMCs), and the effects of TSLP or BDNF on intracellular Ca2+ responses to vasoconstrictor agonist, cell proliferation, and potential signaling cascades involved.
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25
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MicroRNA-20b-5p inhibits platelet-derived growth factor-induced proliferation of human fetal airway smooth muscle cells by targeting signal transducer and activator of transcription 3. Biomed Pharmacother 2018; 102:34-40. [PMID: 29549727 DOI: 10.1016/j.biopha.2018.03.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/28/2018] [Accepted: 03/05/2018] [Indexed: 02/08/2023] Open
Abstract
Pediatric asthma is still a health threat to the pediatric population in recent years. The airway remodeling induced by abnormal airway smooth muscle (ASM) cell proliferation is an important cause of asthma. MicroRNAs (miRNAs) are important regulators of ASM cell proliferation. Numerous studies have reported that miR-20b-5p is a critical regulator for cell proliferation. However, whether miR-20b-5p is involved in regulating ASM cell proliferation remains unknown. In this study, we aimed to investigate the potential role of miR-20b-5p in regulating the proliferation of fetal ASM cell induced by platelet-derived growth factor (PDGF). Here, we showed that miR-20b-5p was significantly decreased in fetal ASM cells treated with PDGF. Biological experiments showed that the overexpression of miR-20b-5p inhibited the proliferation while miR-20b-5p inhibition markedly promoted the proliferation of fetal ASM cells. Bioinformatics analysis and luciferase reporter assay showed that miR-20b-5p directly targeted the 3'-UTR of signal transducer and activator of transcription 3 (STAT3). Further data showed that miR-20b-5p negatively regulated the expression of STAT3 in fetal ASM cells. Moreover, miR-20b-5p regulates the transcriptional activity of STAT3 in fetal ASM cells. Overexpression of STAT3 reversed the inhibitory effect of miR-20b-5p overexpression on fetal ASM cell proliferation while the knockdown of STAT3 abrogated the promoted effect of miR-20b-5p inhibition on fetal ASM cell proliferation. Overall, our results show that miR-20b-5p impedes PDGF-induced proliferation of fetal ASM cells through targeting STAT3. Our study suggests that miR-20b-5p may play an important role in airway remodeling during asthma and suggests that miR-20b-5p may serve as a potential therapeutic target for pediatric asthma.
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Human airway smooth muscle cell proliferation from asthmatics is negatively regulated by semaphorin3A. Oncotarget 2018; 7:80238-80251. [PMID: 27791986 PMCID: PMC5348316 DOI: 10.18632/oncotarget.12884] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Accepted: 10/06/2016] [Indexed: 12/11/2022] Open
Abstract
Airway smooth muscle (ASM) hyperplasia is a key feature of airway remodeling in development of lung diseases such as asthma. Anomalous proliferation of ASM cells directly contributes to ASM hyperplasia. However, the molecular mechanisms controlling ASM cell proliferation are not completely understood. Semaphorins are versatile regulators of various cellular processes including cell growth and proliferation. The role of semaphorins in ASM cell proliferation has remained to be addressed. Here, we report that semaphorin 3A (Sema3A) receptor, neuropilin 1 (Nrp1), is expressed on human ASM cells (HASMC) isolated from healthy and asthmatic donors and treatment of these cells with exogenous Sema3A inhibits growth factor-induced proliferation. Sema3A inhibitory effect on HASMC proliferation is associated with decreased tyrosine phosphorylation of PDGFR, downregulation of Rac1 activation, STAT3 and GSK-3β phosphorylation. Bronchial sections from severe asthmatics displayed immunoreactivity of Nrp1, suggestive of functional contribution of Sema3A-Nrp1 axis in airway remodeling. Together, our data suggest Sema3A-Nrp1 signaling as a novel regulatory pathway of ASM hyperplasia.
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Zhu C, Zhang L, Liu Z, Li C, Bai Y. TWEAK/Fn14 interaction induces proliferation and migration in human airway smooth muscle cells via activating the NF-κB pathway. J Cell Biochem 2018; 119:3528-3536. [PMID: 29143982 DOI: 10.1002/jcb.26525] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 11/13/2017] [Indexed: 12/11/2022]
Abstract
Asthma, an increasingly common chronic disease among children, are characterized by airway remodeling, which is partly attributed to the proliferation and migration of airway smooth muscle cell (ASMC). The purpose of the present study was to investigate potential roles and mechanisms of the tumor necrosis factor-like weak inducer of apoptosis (TWEAK)/fibroblast growth factor-inducible molecule 14 (Fn14) axis on cell proliferation and migration in HASMCs. Compared to HASMCs from non-asthmatic patients, those from asthmatic patients showed elevated expression levels of both Fn14 and TWEAK. Additionally, similar to the response triggered by platelet-derived growth factor-BB, stimulation with recombinant TWEAK strongly induced cell proliferation and migration in HASMCs. However, depletion of Fn14 remarkably abrogated the enhancement of TWEAK on the cell proliferation and migration of HASMCs. Furthermore, treatment with TWEAK led to the activation of NF-κB. This effect was eliminated by silencing Fn14, indicating that TWEAK-induced NF-κB signaling was mediated via Fn14. Moreover, the TWEAK/Fn14 interaction promoted cell proliferation and migration. These effects were blocked by NF-κB inhibitor SN50, which suggest that the TWEAK/Fn14 signaling system partially depends on NF-κB activity. Collectively, we demonstrated that the TWEAK/Fn14 axis accelerated HASMC cell proliferation and migration by activating the NF-κB pathway, thereby exacerbating airway remodeling in asthma. Altogether, these findings indicate a novel role for the TWEAK/Fn14/NF-κB pathway as a potent option for limiting airway remodeling in asthma.
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Affiliation(s)
- Cuimin Zhu
- Department of Pediatrics, Cangzhou Central Hospital, Cangzhou, Hebei, PR China
| | - Leguo Zhang
- Department of Internal Neurology, Cangzhou Central Hospital, Cangzhou, Hebei, PR China
| | - Zhiming Liu
- Department of Pediatrics, Cangzhou Central Hospital, Cangzhou, Hebei, PR China
| | - Chen Li
- Department of Pediatrics, Cangzhou Central Hospital, Cangzhou, Hebei, PR China
| | - Yajie Bai
- Department of Pediatrics, Cangzhou Central Hospital, Cangzhou, Hebei, PR China
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Ji Y, Yang X, Su H. Overexpression of microRNA-375 impedes platelet-derived growth factor-induced proliferation and migration of human fetal airway smooth muscle cells by targeting Janus kinase 2. Biomed Pharmacother 2017; 98:69-75. [PMID: 29245068 DOI: 10.1016/j.biopha.2017.12.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/20/2017] [Accepted: 12/04/2017] [Indexed: 12/21/2022] Open
Abstract
The abnormal proliferation and migration of airway smooth muscle (ASM) cells play a critical role in airway remodeling during the development of asthma. MicroRNAs (miRNAs) have emerged as critical regulators of ASM cell proliferation and migration in airway remodeling. In this study, we aimed to investigate the potential role of miR-375 in the regulation of platelet-derived growth factor (PDGF)-induced fetal ASM cell proliferation and migration. Our results showed that miR-375 expression was significantly decreased in fetal ASM cells that were treated with PDGF. Functional data showed that overexpression of miR-375 inhibited the proliferation and migration of fetal ASM cells, whereas inhibition of miR-375 enhanced the proliferation and migration of fetal ASM cells. The results of bioinformatics analysis and a dual-luciferase reporter assay showed that miR-375 binds directly to the 3'-untranslated region of Janus kinase 2 (JAK2). Further data confirmed that miR-375 negatively regulates the expression of JAK2 in fetal ASM cells. Moreover, miR-375 also impeded the PDGF-induced activation of signal transducer and activator of transcription 3 (STAT3) in fetal ASM cells. However, restoration of JAK2 expression partially reversed the inhibitory effect of miR-375 on fetal ASM cell proliferation and migration. Overall, our results demonstrate that miR-375 inhibits fetal ASM cell proliferation and migration by targeting JAK2/STAT3 signaling. Our study provides a potential therapeutic target for the development of novel treatment strategies for pediatric asthma.
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Affiliation(s)
- Yamei Ji
- Department of Paediatrics, Yulin Xingyuan Hospital, Yulin, Shaanxi 719000, China
| | - Xin Yang
- Second Department of Paediatric Internal Medicine, Yulin Children's Hospital, Yulin, Shaanxi 719000, China
| | - Huixia Su
- Second Department of Paediatric Internal Medicine, Yulin Children's Hospital, Yulin, Shaanxi 719000, China.
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Taher M, Ebrahimi Daryani N, Hedayat M, Eslamian M, Farhadi E, Mahmoudi M, Shirzad S, Nouri Taromlou MK, Chaharmahali M, Nicknam MH, Bashashati M, Rezaei N. Association analysis of RAC1 single nucleotide polymorphisms with ulcerative colitis. Clin Res Hepatol Gastroenterol 2017; 41:487-489. [PMID: 28412192 DOI: 10.1016/j.clinre.2017.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 03/03/2017] [Indexed: 02/04/2023]
Affiliation(s)
- Mohammad Taher
- Department of gastroenterology and hepatology, Tehran university of medical sciences, Tehran, Iran
| | - Nasser Ebrahimi Daryani
- Department of gastroenterology and hepatology, Tehran university of medical sciences, Tehran, Iran
| | - Mona Hedayat
- Division of immunology, Boston children's hospital, Harvard medical school, Boston, MA, USA; Network of immunity in infection, malignancy and autoimmunity (NIIMA), universal scientific education and research network (USERN), Boston, MA, USA
| | - Mohammad Eslamian
- Department of gastroenterology and hepatology, Tehran university of medical sciences, Tehran, Iran
| | - Elham Farhadi
- Hematology department, school of allied medical science, Iran university of medical sciences, Tehran, Iran
| | - Mahdi Mahmoudi
- Rheumatology research center, Tehran university of medical sciences, Tehran, Iran
| | - Samira Shirzad
- Tehran heart center, Tehran university of medical sciences, Tehran, Iran
| | | | - Meghedi Chaharmahali
- Gasterointestinal and digestive research center, Tehran university of medical sciences, Tehran, Iran
| | - Mohammad Hossein Nicknam
- Department of immunology, school of medicine, Tehran university of medical sciences, Tehran, Iran; Molecular immunology research center, Tehran university of medical sciences, Tehran, Iran
| | - Mohammad Bashashati
- Network of immunity in infection, malignancy and autoimmunity (NIIMA), universal scientific education and research network (USERN), El Paso, TX, USA
| | - Nima Rezaei
- Department of immunology, school of medicine, Tehran university of medical sciences, Tehran, Iran; Research center for immunodeficiencies, children's medical center, Tehran university of medical sciences, Tehran, Iran; Network of immunity in infection, malignancy and autoimmunity (NIIMA), universal scientific education and research network (USERN), Tehran, Iran.
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Xu YD, Wang Y, Yin LM, Peng LL, Park GH, Yang YQ. S100A8 inhibits PDGF-induced proliferation of airway smooth muscle cells dependent on the receptor for advanced glycation end-products. Biol Res 2017. [PMID: 28637501 PMCID: PMC5479006 DOI: 10.1186/s40659-017-0128-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Background Airway remodeling is a key feature of asthma, characterized by increased proliferation of airway smooth muscle cells (ASMCs). S100A8 is a calcium-binding protein with a potential to regulate cell proliferation. Here, the effect of exogenous S100A8 protein on the proliferation of ASMCs induced by platelet-derived growth factor (PDGF) and the underlying molecular mechanism was investigated. Methods Rat ASMCs were cultured with or without a neutralizing antibody to the receptor for advanced glycation end-products (RAGE), a potential receptor for S100A8 protein. Purified recombinant rat S100A8 protein was then added into the cultured cells, and the proliferation of ASMCs induced by PDGF was detected by colorimetric-based WST-8 assay and ampedance-based xCELLigence proliferation assay. The expression levels of RAGE in ASMCs were analyzed using western blotting assay. Results Results showed that exogenous S100A8 inhibited the PDGF-induced proliferation of rat ASMCs in a dose-dependent manner with the maximal effect at 1 μg/ml in vitro. Furthermore, when ASMCs was pre-treated with anti-RAGE neutralizing antibody, the inhibitory effect of S100A8 on PDGF-induced proliferation was significantly suppressed. In addition, neither the treatment with S100A8 or PDGF alone nor the pre-treatment with rS100A8 followed by PDGF stimulation affected the expression levels of RAGE. Conclusions Our study demonstrated that S100A8 inhibits PDGF-induced ASMCs proliferation in a manner dependent on membrane receptor RAGE.
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Affiliation(s)
- Yu-Dong Xu
- Laboratory of Molecular Biology, Shanghai Research Institute of Acupuncture and Meridian, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 650 South Wanping Road, Shanghai, 200030, China
| | - Yu Wang
- Laboratory of Molecular Biology, Shanghai Research Institute of Acupuncture and Meridian, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 650 South Wanping Road, Shanghai, 200030, China
| | - Lei-Miao Yin
- Laboratory of Molecular Biology, Shanghai Research Institute of Acupuncture and Meridian, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 650 South Wanping Road, Shanghai, 200030, China
| | - Ling-Ling Peng
- Laboratory of Molecular Biology, Shanghai Research Institute of Acupuncture and Meridian, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 650 South Wanping Road, Shanghai, 200030, China
| | - Gyoung-Hee Park
- Laboratory of Molecular Biology, Shanghai Research Institute of Acupuncture and Meridian, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 650 South Wanping Road, Shanghai, 200030, China
| | - Yong-Qing Yang
- Laboratory of Molecular Biology, Shanghai Research Institute of Acupuncture and Meridian, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 650 South Wanping Road, Shanghai, 200030, China.
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Barnes PJ. Kinases as Novel Therapeutic Targets in Asthma and Chronic Obstructive Pulmonary Disease. Pharmacol Rev 2017; 68:788-815. [PMID: 27363440 DOI: 10.1124/pr.116.012518] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Multiple kinases play a critical role in orchestrating the chronic inflammation and structural changes in the respiratory tract of patients with asthma and chronic obstructive pulmonary disease (COPD). Kinases activate signaling pathways that lead to contraction of airway smooth muscle and release of inflammatory mediators (such as cytokines, chemokines, growth factors) as well as cell migration, activation, and proliferation. For this reason there has been great interest in the development of kinase inhibitors as anti-inflammatory therapies, particular where corticosteroids are less effective, as in severe asthma and COPD. However, it has proven difficult to develop selective kinase inhibitors that are both effective and safe after oral administration and this has led to a search for inhaled kinase inhibitors, which would reduce systemic exposure. Although many kinases have been implicated in inflammation and remodeling of airway disease, very few classes of drug have reached the stage of clinical studies in these diseases. The most promising drugs are p38 MAP kinases, isoenzyme-selective PI3-kinases, Janus-activated kinases, and Syk-kinases, and inhaled formulations of these drugs are now in development. There has also been interest in developing inhibitors that block more than one kinase, because these drugs may be more effective and with less risk of losing efficacy with time. No kinase inhibitors are yet on the market for the treatment of airway diseases, but as kinase inhibitors are improved from other therapeutic areas there is hope that these drugs may eventually prove useful in treating refractory asthma and COPD.
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Affiliation(s)
- Peter J Barnes
- National Heart and Lung Institute, Imperial College, London, United Kingdom
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Lv J, Sun B, Mai Z, Jiang M, Du J. STAT3 potentiates the ability of airway smooth muscle cells to promote angiogenesis by regulating VEGF signalling. Exp Physiol 2017; 102:598-606. [PMID: 28295786 DOI: 10.1113/ep086136] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 03/03/2017] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? Airway angiogenesis occurs in asthma, and airway smooth muscle (ASM) cells have been reported to be capable of promoting airway angiogenesis. What is the potential mechanism by which ASM cells harvested from patients with asthma are capable of promoting airway angiogenesis? What is the main finding and its importance? Endogenous STAT3 mediated the pro-angiogenic ability of ASM cells by directly activating VEGF signalling. These findings contribute to the understanding of airway angiogenesis in pathology and could represent a possible therapeutic target for asthma. Airway angiogenesis indicates the specific vascular structure remodelling that occurs in asthma. Airway smooth muscle (ASM) cells have been reported to be capable of promoting airway angiogenesis; however, the potential mechanism is not yet fully defined. Herein, we investigated the role of signal transducer and activator of transcription 3 (STAT3) in the progress of airway angiogenesis. Western blot analysis showed that STAT3 activation was aberrantly upregulated in ASM tissues of patients with asthma and ASM cells that were exposed to cytokines to imitate the airway conditions in patients with asthma. Compared with the control group, both the inhibition of STAT3 activation and the silencing of endogenous STAT3 in ASM cells significantly reduced the proliferation, migration and tube-forming ability of human lung microvascular endothelial cells induced by the conditioned medium (CM) of ASM cells. The increased proliferation and migration of human aortic vascular smooth muscle cells were also repressed by inhibition of STAT3 in ASM cells. Besides, the increased activity of VEGF signalling was observed in ASM cells and the CM by RT-PCR and Western blotting assay, whereas this increased activity was reduced by STAT3 silencing. Further studies indicated that STAT3 regulated VEGF activation by directly interacting with the binding site on the 5' region of the VEGF gene. The increase in STAT3-induced pro-angiogenic activity of ASM cells was significantly decreased by administration of VEGF neutralizing antibody. In conclusion, we provided evidence that endogenous STAT3 mediates the pro-angiogenic ability of ASM cells by directly activating VEGF signalling, which could represent a possible therapeutic target for asthma.
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Affiliation(s)
- Jing Lv
- Department of Respiration Medicine, Cangzhou Central Hospital, Cangzhou, 061001, China
| | - Baohua Sun
- Department of Respiration Medicine, Cangzhou Central Hospital, Cangzhou, 061001, China
| | - Zhitao Mai
- Department of Respiration Medicine, Cangzhou Central Hospital, Cangzhou, 061001, China
| | - Mingming Jiang
- Department of Respiration Medicine, Cangzhou Central Hospital, Cangzhou, 061001, China
| | - Junfeng Du
- Department of Respiration Medicine, Cangzhou Central Hospital, Cangzhou, 061001, China
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Sun Q, Liu L, Wang H, Mandal J, Khan P, Hostettler KE, Stolz D, Tamm M, Molino A, Lardinois D, Lu S, Roth M. Constitutive high expression of protein arginine methyltransferase 1 in asthmatic airway smooth muscle cells is caused by reduced microRNA-19a expression and leads to enhanced remodeling. J Allergy Clin Immunol 2017; 140:510-524.e3. [PMID: 28081849 DOI: 10.1016/j.jaci.2016.11.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 08/30/2016] [Accepted: 11/02/2016] [Indexed: 01/28/2023]
Abstract
BACKGROUND In asthma remodeling airway smooth muscle cells (ASMCs) contribute to airway wall thickness through increased proliferation, migration, and extracellular matrix deposition. Previously, we described that protein arginine methyltransferase 1 (PRMT1) participates in airway remodeling in pulmonary inflammation in E3 rats. OBJECTIVE We sought to define the asthma-specific regulatory mechanism of PRMT1 in human ASMCs. METHODS ASMCs from healthy subjects and asthmatic patients were activated with platelet-derived growth factor (PDGF)-BB. PRMT1 was localized by means of immunohistochemistry in human lung tissue sections and by means of immunofluorescence in isolated ASMCs. PRMT1 activity was suppressed by the pan-PRMT inhibitor AMI-1, signal transducer and activator of transcription 1 (STAT1) was suppressed by small interfering RNA, and extracellular signal-regulated kinase (ERK) 1/2 mitogen-activated protein kinase (MAPK) was suppressed by PD98059. MicroRNAs (miRs) were assessed by using real-time quantitative PCR and regulated by miR mimics or inhibitors. RESULTS PRMT1 expression was significantly increased in lung tissue sections and in isolated ASMCs of patients with severe asthma. PDGF-BB significantly increased PRMT1 expression through ERK1/2 MAPK and STAT1 signaling in control ASMCs, whereas in ASMCs from asthmatic patients, these proteins were constitutively expressed. ASMCs from asthmatic patients had reduced miR-19a expression, causing upregulation of ERK1/2 MAPK, STAT1, and PRMT1. Inhibition of PRMT1 abrogated collagen type I and fibronectin deposition, cell proliferation, and migration of ASMCs from asthmatic patients. CONCLUSIONS PRMT1 is a central regulator of tissue remodeling in ASMCs from asthmatic patients through the pathway: PDGF-BB-miR-19a-ERK1/2 MAPK and STAT1. Low miR-19a expression in ASMCs from asthmatic patients is the key event that results in constitutive increased PRMT1 expression and remodeling. Therefore PRMT1 is an attractive target to limit airway wall remodeling in asthmatic patients.
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Affiliation(s)
- Qingzhu Sun
- Department of Biochemistry and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases (Ministry of Education), Xi'an Jiaotong University Health Science Center, Xi'an, China; Pneumology and Pulmonary Cell Research, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
| | - Li Liu
- Department of Biochemistry and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases (Ministry of Education), Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Hui Wang
- Stem Cells and Hematopoiesis, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
| | - Jyotshna Mandal
- Pneumology and Pulmonary Cell Research, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
| | - Petra Khan
- Pneumology and Pulmonary Cell Research, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
| | - Katrin E Hostettler
- Pneumology and Pulmonary Cell Research, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
| | - Daiana Stolz
- Pneumology and Pulmonary Cell Research, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
| | - Michael Tamm
- Pneumology and Pulmonary Cell Research, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
| | - Antonio Molino
- Department of Respiratory Diseases, University of Naples, Federico II, Naples, Italy
| | - Didier Lardinois
- Department of Thoracic Surgery, University Hospital Basel, Basel, Switzerland
| | - Shemin Lu
- Department of Biochemistry and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases (Ministry of Education), Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Michael Roth
- Pneumology and Pulmonary Cell Research, Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland.
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Novatt H, Theisen TC, Massie T, Massie T, Simonyan V, Voskanian-Kordi A, Renn LA, Rabin RL. Distinct Patterns of Expression of Transcription Factors in Response to Interferonβ and Interferonλ1. J Interferon Cytokine Res 2016; 36:589-598. [PMID: 27447339 DOI: 10.1089/jir.2016.0031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
After viral infection, type I and III interferons (IFNs) are coexpressed by respiratory epithelial cells (RECs) and activate the ISGF3 transcription factor (TF) complex to induce expression of a cell-specific set of interferon-stimulated genes (ISGs). Type I and III IFNs share a canonical signaling pathway, suggesting that they are redundant. Animal and in vitro models, however, have shown that they are not redundant. Because TFs dictate cellular phenotype and function, we hypothesized that focusing on TF-ISG will reveal critical combinatorial and nonredundant functions of type I or III IFN. We treated BEAS-2B human RECs with increasing doses of IFNβ or IFNλ1 and measured expression of TF-ISG. ISGs were expressed in a dose-dependent manner with a nonlinear jump at intermediate doses. At subsaturating combinations of IFNβ and IFNλ1, many ISGs were expressed in a pattern that we modeled with a cubic equation that mathematically defines this threshold effect. Uniquely, IFNβ alone induced early and transient IRF1 transcript and protein expression, while IFNλ1 alone induced IRF1 protein expression at low levels that were sustained through 24 h. In combination, saturating doses of these 2 IFNs together enhanced and sustained IRF1 expression. We conclude that the cubic model quantitates combinatorial effects of IFNβ and IFNλ1 and that IRF1 may mediate nonredundancy of type I or III IFN in RECs.
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Affiliation(s)
- Hilary Novatt
- 1 Center for Biologics Evaluation and Research , US Food and Drug Administration, Silver Spring, Maryland
| | - Terence C Theisen
- 1 Center for Biologics Evaluation and Research , US Food and Drug Administration, Silver Spring, Maryland
| | - Tammy Massie
- 1 Center for Biologics Evaluation and Research , US Food and Drug Administration, Silver Spring, Maryland
| | - Tristan Massie
- 2 Drugs Evaluation and Research, USFDA, Silver Spring, Maryland
| | - Vahan Simonyan
- 1 Center for Biologics Evaluation and Research , US Food and Drug Administration, Silver Spring, Maryland
| | - Alin Voskanian-Kordi
- 1 Center for Biologics Evaluation and Research , US Food and Drug Administration, Silver Spring, Maryland
| | - Lynnsey A Renn
- 1 Center for Biologics Evaluation and Research , US Food and Drug Administration, Silver Spring, Maryland
| | - Ronald L Rabin
- 1 Center for Biologics Evaluation and Research , US Food and Drug Administration, Silver Spring, Maryland
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Activated Rac1 regulates the degradation of IκBα and the nuclear translocation of STAT3-NFκB complexes in starved cancer cells. Exp Mol Med 2016; 48:e231. [PMID: 27151455 PMCID: PMC4910147 DOI: 10.1038/emm.2016.17] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 12/23/2015] [Accepted: 12/29/2015] [Indexed: 12/21/2022] Open
Abstract
In several human tumors, signal transducer and activator of transcription 3 (STAT3) and nuclear factor κB (NFκB) are activated and interact; how these STAT3–NFκB complexes are transported to the nucleus is not fully understood. In this study, we found that Rac1 was activated in starved cancer cells and that activated Rac1 coexisted with STAT3 and NFκB. Rac1 knockdown and overexpression of the dominant-negative mutant Rac1N19 inhibited the degradation of IκBα, an inhibitor of NFκB. MG132, an inhibitor of the ubiquitin proteasome pathway, increased the amount of non-phosphorylated IκBα, but not serine-phosphorylated IκBα, indicating that IκBα degradation by Rac1 in starved cancer cells is independent of IκBα serine phosphorylation by IKK. Rac1 knockdown also inhibited the nuclear translocation of STAT3–NFκB complexes, indicating that this translocation requires activated Rac1. We also demonstrated that the mutant STAT3 Y705F could form complexes with NFκB, and these unphosphorylated STAT3–NFκB complexes translocated into the nucleus and upregulated the activity of NFκB in starved cancer cells, suggesting that phosphorylation of STAT3 is not essential for its translocation. To our knowledge, this is the first study demonstrating the crucial role of Rac1 in the function of STAT3–NFκB complexes in starved cancer cells and implies that targeting Rac1 may have future therapeutic significance in cancer therapy.
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Chen CY, Liu SH, Chen CY, Chen PC, Chen CP. Human placenta-derived multipotent mesenchymal stromal cells involved in placental angiogenesis via the PDGF-BB and STAT3 pathways. Biol Reprod 2015; 93:103. [PMID: 26353894 DOI: 10.1095/biolreprod.115.131250] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 09/08/2015] [Indexed: 12/23/2022] Open
Abstract
We studied the smooth muscle cell differentiation capability of human placental multipotent mesenchymal stromal cells (hPMSCs) and identified how endothelial cells recruit hPMSCs participating in vessel formation. hPMSCs from term placentas were induced to differentiate into smooth muscle cells under induction conditions and different matrix substrates. We assessed endothelial cells from umbilical veins for platelet-derived growth factor (PDGF)-BB expression and to induce hPMSC PDGFR-beta and STAT3 activation. Endothelial cells were co-cultured with hPMSCs for in vitro angiogenesis. Cell differentiation ability was then further assessed by mouse placenta transplantation assay. hPMSCs can differentiate into smooth muscle cells; collagen type I and IV or laminin support this differentiation. Endothelial cells expressed significant levels of PDGF-BB and activated STAT3 transcriptional activity in hPMSCs. Endothelial cell-conditioned medium induced hPMSC migration, which was inhibited by STAT3 small interfering RNA transfection or by pretreatement with PDGFR-beta-blocking antibody but not by PDGFR-alpha-blocking antibody or isotype immunoglobulin G (IgG; P < 0.001). hPMSCs can incorporate into endothelial cells with tube formation and promote endothelial cells, forming capillary-like networks than endothelial cells alone (tube lengths: 12 024.1 ± 960.1 vs. 9404.2 ± 584.7 pixels; P < 0.001). Capillary-like networks were significantly reduced by hPMSCs pretreated with PDGFR-beta-blocking antibody but not by PDGFR-alpha-blocking antibody or isotype IgG (P < 0.001). Transplantation of hPMSCs into mouse placentas revealed incorporation of the hPMSCs into vessel walls, which expressed alpha-smooth muscle actin, calponin, and smooth muscle myosin (heavy chain) in vivo. In conclusion, endothelial cell-hPMSC interactions occur during vessel development of placenta. Placental endothelial cell-derived PDGF-BB recruits hPMSCs involved in vascular development via PDGFR-beta/STAT3 activation.
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Affiliation(s)
- Cheng-Yi Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Shu-Hsiang Liu
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chia-Yu Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Pei-Chun Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chie-Pein Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan Division of High Risk Pregnancy, Mackay Memorial Hospital, Taipei, Taiwan
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Zhang G, Zhao L, Wang Y, Shao J, Cui J, Lou Y, Geng M, Zhang N, Chen YH, Liu S. TIPE2 protein prevents injury-induced restenosis in mice. Biochim Biophys Acta Mol Basis Dis 2015; 1852:1574-84. [DOI: 10.1016/j.bbadis.2015.04.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 11/25/2022]
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Yang K, Lu W, Jia J, Zhang J, Zhao M, Wang S, Jiang H, Xu L, Wang J. Noggin inhibits hypoxia-induced proliferation by targeting store-operated calcium entry and transient receptor potential cation channels. Am J Physiol Cell Physiol 2015; 308:C869-78. [PMID: 25740156 PMCID: PMC4451349 DOI: 10.1152/ajpcell.00349.2014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 02/20/2015] [Indexed: 02/08/2023]
Abstract
Abnormally elevated bone morphogenetic protein 4 (BMP4) expression and mediated signaling play a critical role in the pathogenesis of chronic hypoxia-induced pulmonary hypertension (CHPH). In this study, we investigated the expression level and functional significance of four reported naturally occurring BMP4 antagonists, noggin, follistatin, gremlin1, and matrix gla protein (MGP), in the lung and distal pulmonary arterial smooth muscle cell (PASMC). A 21-day chronic hypoxic (10% O2) exposure rat model was utilized, which has been previously shown to successfully establish experimental CHPH. Among the four antagonists, noggin, but not the other three, was selectively downregulated by hypoxic exposure in both the lung tissue and PASMC, in correlation with markedly elevated BMP4 expression, suggesting that the loss of noggin might account for the hypoxia-triggered BMP4 signaling transduction. Then, by using treatment of extrogenous recombinant noggin protein, we further found that noggin significantly normalized 1) BMP4-induced phosphorylation of cellular p38 and ERK1/2; 2) BMP4-induced phosphorylation of cellular JAK2 and STAT3; 3) hypoxia-induced PASMC proliferation; 4) hypoxia-induced store-operated calcium entry (SOCE), and 5) hypoxia-increased expression of transient receptor potential cation channels (TRPC1 and TRPC6) in PASMC. In combination, these data strongly indicated that the hypoxia-suppressed noggin accounts, at least partially, for hypoxia-induced excessive PASMC proliferation, while restoration of noggin may be an effective way to inhibit cell proliferation by suppressing SOCE and TRPC expression.
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Affiliation(s)
- Kai Yang
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; and
| | - Wenju Lu
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jing Jia
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jie Zhang
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Mingming Zhao
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, Maryland
| | - Sabrina Wang
- Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; and
| | - Haiyang Jiang
- Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; and
| | - Lei Xu
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; and
| | - Jian Wang
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; and
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Wang Y, Kunit T, Ciotkowska A, Rutz B, Schreiber A, Strittmatter F, Waidelich R, Liu C, Stief CG, Gratzke C, Hennenberg M. Inhibition of prostate smooth muscle contraction and prostate stromal cell growth by the inhibitors of Rac, NSC23766 and EHT1864. Br J Pharmacol 2015; 172:2905-17. [PMID: 25631101 PMCID: PMC4439884 DOI: 10.1111/bph.13099] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 01/19/2015] [Accepted: 01/20/2015] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND AND PURPOSE Medical therapy of lower urinary tract symptoms (LUTS) suggestive of benign prostatic hyperplasia (BPH) targets smooth muscle contraction in the prostate, or prostate growth. However, current therapeutic options are insufficient. Here, we investigated the role of Rac in the control of smooth muscle tone in human prostates and growth of prostate stromal cells. EXPERIMENTAL APPROACH Experiments were performed using human prostate tissues from radical prostatectomy and cultured stromal cells (WPMY-1). Expression of Rac was examined by Western blot and fluorescence staining. Effects of Rac inhibitors (NSC23766 and EHT1864) on contractility were assessed in the organ bath. The effects of Rac inhibitors were assessed by pull-down, cytotoxicity using a cell counting kit, cytoskeletal organization by phalloidin staining and cell growth using an 5-ethynyl-2'-deoxyuridine assay. KEY RESULTS Expression of Rac1-3 was observed in prostate samples from each patient. Immunoreactivity for Rac1-3 was observed in the stroma, where it colocalized with the smooth muscle marker, calponin. NSC23766 and EHT1864 significantly reduced contractions of prostate strips induced by noradrenaline, phenylephrine or electrical field stimulation. NSC23766 and EHT1864 inhibited Rac activity in WPMY-1 cells. Survival of WPMY-1 cells ranged between 64 and 81% after incubation with NSC23766 (50 or 100 μM) or EHT1864 (25 μM) for 24 h. NSC23766 and EHT1864 induced cytoskeletal disorganization in WPMY-1 cells. Both inhibitors impaired the growth of WPMY-1 cells. CONCLUSIONS AND IMPLICATIONS Rac may be a link connecting the control of prostate smooth muscle tone with proliferation of smooth muscle cells. Improvements in LUTS suggestive of BPH by Rac inhibitors appears possible.
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Affiliation(s)
- Y Wang
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
- Department of Urology, Zhujiang Hospital, Southern Medical UniversityGuangzhou, China
| | - T Kunit
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
- University Hospital for Urology and AndrologySalzburg, Austria
| | - A Ciotkowska
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
| | - B Rutz
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
| | - A Schreiber
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
| | - F Strittmatter
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
| | - R Waidelich
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
| | - C Liu
- Department of Urology, Zhujiang Hospital, Southern Medical UniversityGuangzhou, China
| | - C G Stief
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
| | - C Gratzke
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
| | - M Hennenberg
- Department of Urology, Ludwig Maximilian UniversityMunich, Germany
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Park S, Kim JK, Oh CJ, Choi SH, Jeon JH, Lee IK. Scoparone interferes with STAT3-induced proliferation of vascular smooth muscle cells. Exp Mol Med 2015; 47:e145. [PMID: 25744297 PMCID: PMC4351406 DOI: 10.1038/emm.2014.113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 10/29/2014] [Accepted: 11/06/2014] [Indexed: 01/15/2023] Open
Abstract
Scoparone, which is a major constituent of Artemisia capillaries, has been identified as an anticoagulant, hypolipidemic, vasorelaxant, anti-oxidant and anti-inflammatory drug, and it is used for the traditional treatment of neonatal jaundice. Therefore, we hypothesized that scoparone could suppress the proliferation of VSMCs by interfering with STAT3 signaling. We found that the proliferation of these cells was significantly attenuated by scoparone in a dose-dependent manner. Scoparone markedly reduced the serum-stimulated accumulation of cells in the S phase and concomitantly increased the proportion of cells in the G0/G1 phase, which was consistent with the reduced expression of cyclin D1, phosphorylated Rb and survivin in the VSMCs. Cell adhesion markers, such as MCP-1 and ICAM-1, were significantly reduced by scoparone. Interestingly, this compound attenuated the increase in cyclin D promoter activity by inhibiting the activities of both the WT and active forms of STAT3. Similarly, the expression of a cell proliferation marker induced by PDGF was decreased by scoparone with no change in the phosphorylation of JAK2 or Src. On the basis of the immunofluorescence staining results, STAT3 proteins phosphorylated by PDGF were predominantly localized to the nucleus and were markedly reduced in the scoparone-treated cells. In summary, scoparone blocks the accumulation of STAT3 transported from the cytosol to the nucleus, leading to the suppression of VSMC proliferation through G1 phase arrest and the inhibition of Rb phosphorylation. This activity occurs independent of the form of STAT3 and upstream of kinases, such as Jak and Src, which are correlated with abnormal vascular remodeling due to the presence of an excess of growth factors following vascular injury. These data provide convincing evidence that scoparone may be a new preventative agent for the treatment of cardiovascular diseases.
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Affiliation(s)
- Sungmi Park
- Leading-edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jeong-Kook Kim
- BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Chang Joo Oh
- BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Seung Hee Choi
- Department of Biomedical Science, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Han Jeon
- Departments of Internal Medicine, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - In-Kyu Lee
- 1] Leading-edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea [2] BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea [3] Department of Biomedical Science, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea [4] Departments of Internal Medicine, Kyungpook National University School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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Liu L, Zhang J, Zhu Y, Xiao X, Peng X, Yang G, Zang J, Liu S, Li T. Beneficial effects of platelet-derived growth factor on hemorrhagic shock in rats and the underlying mechanisms. Am J Physiol Heart Circ Physiol 2014; 307:H1277-87. [PMID: 25172895 DOI: 10.1152/ajpheart.00006.2014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Studies have shown that local application of platelet-derived growth factor (PDGF) can be used for the treatment of acute and chronic wounds. We investigated if systemic application of PDGF has a protective effect on acute hemorrhagic shock in rats in the present study. Using hemorrhagic shock rats and isolated superior mesenteric arteries, the effects of PDGF-BB on hemodynamics, animal survival, and vascular reactivity as well as the roles of the gap junction proteins connexin (Cx)40 and Cx43, PKC, and Rho kinase were observed. PDGF-BB (1–15 μg/kg iv) significantly improved the hemodynamics and blood perfusion to vital organs (liver and kidney) as well as vascular reactivity and improved the animal survival in hemorrhagic shock rats. PDGF recovering shock-induced vascular hyporeactivity depended on the integrity of the endothelium and myoendothelial gap junction. Cx43 antisense oligodeoxynucleotide abolished these improving effects of PDGF, whereas Cx40 oligodeoxynucleotide did not. Further study indicated that PDGF increased the activity of Rho kinase and PKC as well as vascular Ca2+ sensitivity, whereas it did not interfere with the intracellular Ca2+ concentration in hypoxia-treated vascular smooth muscle cells. In conclusion, systemic application of PDGF-BB may exert beneficial effects on hemorrhagic shock, which are closely related to the improvement of vascular reactivity and hemodynamics. The improvement of PDGF-BB in vascular reactivity is vascular endothelium and myoendothelial gap junction dependent. Cx43, Rho kinase, and PKC play very important role in this process. These findings suggest that PDGF may be a potential measure to treat acute clinical critical diseases such as severe trauma, shock, and sepsis.
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MESH Headings
- Angiogenesis Inducing Agents/pharmacology
- Angiogenesis Inducing Agents/therapeutic use
- Animals
- Becaplermin
- Calcium Signaling
- Connexin 43/genetics
- Connexin 43/metabolism
- Connexins/genetics
- Connexins/metabolism
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Gap Junctions/drug effects
- Gap Junctions/metabolism
- Gap Junctions/physiology
- Hemodynamics/drug effects
- Liver Circulation
- Mesenteric Artery, Superior/cytology
- Mesenteric Artery, Superior/metabolism
- Mesenteric Artery, Superior/physiopathology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Protein Kinase C/metabolism
- Proto-Oncogene Proteins c-sis/pharmacology
- Proto-Oncogene Proteins c-sis/therapeutic use
- Rats
- Rats, Wistar
- Renal Circulation
- Shock, Hemorrhagic/drug therapy
- Shock, Hemorrhagic/metabolism
- Shock, Hemorrhagic/physiopathology
- rho-Associated Kinases/metabolism
- Gap Junction alpha-5 Protein
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Death-associated protein kinase 3 mediates vascular structural remodelling via stimulating smooth muscle cell proliferation and migration. Clin Sci (Lond) 2014; 127:539-48. [PMID: 24814693 DOI: 10.1042/cs20130591] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Death-associated protein kinase 3 (DAPK3) also known as zipper-interacting kinase is a serine/threonine kinase that mainly regulates cell death and smooth muscle contraction. We have previously found that protein expression of DAPK3 increases in the mesenteric artery from spontaneously hypertensive rats (SHRs) and that DAPK3 mediates the development of hypertension in SHRs partly through promoting reactive oxygen species-dependent vascular inflammation. However, it remains to be clarified how DAPK3 controls smooth muscle cell (SMC) proliferation and migration, which are also important processes for hypertension development. We, therefore, sought to investigate whether DAPK3 affects SMC proliferation and migration. siRNA against DAPK3 significantly inhibited platelet-derived growth factor (PDGF)-BB-induced SMC proliferation and migration as determined by bromodeoxyuridine (BrdU) incorporation and a cell counting assay as well as a Boyden chamber assay respectively. DAPK3 siRNA or a pharmacological inhibitor of DAPK3 inhibited PDGF-BB-induced lamellipodia formation as determined by rhodamine-phalloidin staining. DAPK3 siRNA or the DAPK inhibitor significantly reduced PDGF-BB-induced activation of p38 and heat-shock protein 27 (HSP27) as determined by Western blotting. In ex vivo studies, PDGF-BB-induced SMC out-growth was significantly inhibited by the DAPK inhibitor. In vivo, the DAPK inhibitor significantly prevented carotid neointimal hyperplasia in a mouse ligation model. The present results, for the first time, revealed that DAPK3 mediates PDGF-BB-induced SMC proliferation and migration through activation of p38/HSP27 signals, which may lead to vascular structural remodelling including neointimal hyperplasia. The present study suggests DAPK3 as a novel pharmaceutical target for the prevention of hypertensive cardiovascular diseases.
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Integration of proteomic and transcriptomic profiles identifies a novel PDGF-MYC network in human smooth muscle cells. Cell Commun Signal 2014; 12:44. [PMID: 25080971 PMCID: PMC4422302 DOI: 10.1186/s12964-014-0044-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 06/23/2014] [Indexed: 12/12/2022] Open
Abstract
Background Platelet-derived growth factor-BB (PDGF-BB) has been implicated in the proliferation, migration and synthetic activities of smooth muscle cells that characterize physiologic and pathologic tissue remodeling in hollow organs. However, neither the molecular basis of PDGFR-regulated signaling webs, nor the extent to which specific components within these networks could be exploited for therapeutic benefit has been fully elucidated. Results Expression profiling and quantitative proteomics analysis of PDGF-treated primary human bladder smooth muscle cells identified 1,695 genes and 241 proteins as differentially expressed versus non-treated cells. Analysis of gene expression data revealed MYC, JUN, EGR1, MYB, RUNX1, as the transcription factors most significantly networked with up-regulated genes. Forty targets were significantly altered at both the mRNA and protein levels. Proliferation, migration and angiogenesis were the biological processes most significantly associated with this signature, and MYC was the most highly networked master regulator. Alterations in master regulators and gene targets were validated in PDGF-stimulated smooth muscle cells in vitro and in a model of bladder injury in vivo. Pharmacologic inhibition of MYC and JUN confirmed their role in SMC proliferation and migration. Network analysis identified the diaphanous-related formin 3 as a novel PDGF target regulated by MYC and JUN, which was necessary for PDGF-stimulated lamellipodium formation. Conclusions These findings provide the first systems-level analysis of the PDGF-regulated transcriptome and proteome in normal smooth muscle cells. The analyses revealed an extensive cohort of PDGF-dependent biological processes and connected key transcriptional effectors to their regulation, significantly expanding current knowledge of PDGF-stimulated signaling cascades. These observations also implicate MYC as a novel target for pharmacological intervention in fibroproliferative expansion of smooth muscle, and potentially in cancers in which PDGFR-dependent signaling or MYC activation promote tumor progression.
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Glosson NL, Bruns HA, Kaplan MH. Wheezing and itching: The requirement for STAT proteins in allergic inflammation. JAKSTAT 2014; 1:3-12. [PMID: 24058746 PMCID: PMC3670132 DOI: 10.4161/jkst.19086] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Accepted: 12/16/2011] [Indexed: 12/16/2022] Open
Abstract
The development of allergic inflammation requires the orchestration of gene expression from the inflamed tissue and from the infiltrating immune cells. Since many of the cytokines that promote allergic inflammation signal through hematopoietin family receptors, the Signal Transducer and Activator of Transcription (STAT) family have obligate roles in pro-allergic cytokine-induced gene regulation in multiple cell types. In this review, we summarize work defining the contribution of each of the STAT family members to the development of allergic inflammation, using data from mouse models of allergic inflammation, studies on patient samples and correlations with single nucleotide polymorphisms in STAT genes.
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Affiliation(s)
- Nicole L Glosson
- Department of Pediatrics; Herman B. Wells Center for Pediatric Research; Department of Microbiology and Immunology; Indiana University School of Medicine; Indianapolis, IN USA
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Thymic stromal lymphopoietin induces migration in human airway smooth muscle cells. Sci Rep 2014; 3:2301. [PMID: 23892442 PMCID: PMC3725475 DOI: 10.1038/srep02301] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 07/10/2013] [Indexed: 02/06/2023] Open
Abstract
Airway remodeling due to increased airway smooth muscle (ASM) mass, likely due to enhanced migration and proliferation, has been shown to be highly associated with decline in lung function in asthma. Thymic stromal lymphopoietin (TSLP) is an IL-7-like, pro-allergic cytokine that has been shown to be necessary and sufficient for the development of allergic asthma. Human ASM (HASM) cells express TSLP receptor (TSLPR), the activation of which leads to enhanced release of proinflammatory mediators such as IL-6, CCL11/eotaxin-1, and CXCL8/IL-8. We show here that TSLP induces HASM cell migration through STAT3 activation since lentiviral-shRNA inhibition of STAT3 abrogated the TSLP-induced cell migration. Moreover, TSLP induced multiple cytoskeleton changes in HASM cells such as actin polymerization, cell polarization, and activation of small GTPase Rac1. Collectively, our data suggest a pro-migratory function of TSLP in ASM remodeling and provides better rationale for targeting TSLP/TSLPR pathway for therapeutic approaches in allergic asthma.
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Abstract
Airway remodeling comprises the structural changes of airway walls, induced by repeated injury and repair processes. It is characterized by the changes of tissue, cellular, and molecular composition, affecting airway smooth muscle, epithelium, blood vessels, and extracellular matrix. It occurs in patients with chronic inflammatory airway diseases such as asthma, COPD, bronchiectasis, and cystic fibrosis. Airway remodeling is arguably one of the most intractable problems in these diseases, leading to irreversible loss of lung function. Current therapeutics can ameliorate inflammation, but there is no available therapy proven to prevent or reverse airway remodeling, although reversibility of airway remodeling is suggested by studies in animal models of disease. Airway remodeling is often considered the result of longstanding airway inflammation, but it may be present to an equivalent degree in the airways of children with asthma, raising the necessity for early and specific therapeutic interventions. In this review, we consider the factors that may contribute to airway remodeling and discuss the current and potential therapeutic interventions.
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Affiliation(s)
- Nobuaki Hirota
- Meakins-Christie Laboratories, Department of Medicine, McGill University, Montreal, QC, Canada
| | - James G Martin
- Meakins-Christie Laboratories, Department of Medicine, McGill University, Montreal, QC, Canada.
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Prakash YS. Airway smooth muscle in airway reactivity and remodeling: what have we learned? Am J Physiol Lung Cell Mol Physiol 2013; 305:L912-33. [PMID: 24142517 PMCID: PMC3882535 DOI: 10.1152/ajplung.00259.2013] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 10/12/2013] [Indexed: 12/12/2022] Open
Abstract
It is now established that airway smooth muscle (ASM) has roles in determining airway structure and function, well beyond that as the major contractile element. Indeed, changes in ASM function are central to the manifestation of allergic, inflammatory, and fibrotic airway diseases in both children and adults, as well as to airway responses to local and environmental exposures. Emerging evidence points to novel signaling mechanisms within ASM cells of different species that serve to control diverse features, including 1) [Ca(2+)]i contractility and relaxation, 2) cell proliferation and apoptosis, 3) production and modulation of extracellular components, and 4) release of pro- vs. anti-inflammatory mediators and factors that regulate immunity as well as the function of other airway cell types, such as epithelium, fibroblasts, and nerves. These diverse effects of ASM "activity" result in modulation of bronchoconstriction vs. bronchodilation relevant to airway hyperresponsiveness, airway thickening, and fibrosis that influence compliance. This perspective highlights recent discoveries that reveal the central role of ASM in this regard and helps set the stage for future research toward understanding the pathways regulating ASM and, in turn, the influence of ASM on airway structure and function. Such exploration is key to development of novel therapeutic strategies that influence the pathophysiology of diseases such as asthma, chronic obstructive pulmonary disease, and pulmonary fibrosis.
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Affiliation(s)
- Y S Prakash
- Dept. of Anesthesiology, Mayo Clinic, 4-184 W Jos SMH, 200 First St. SW, Rochester, MN 55905.
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Redhu NS, Shan L, Al-Subait D, Ashdown HL, Movassagh H, Lamkhioued B, Gounni AS. IgE induces proliferation in human airway smooth muscle cells: role of MAPK and STAT3 pathways. Allergy Asthma Clin Immunol 2013; 9:41. [PMID: 24499258 PMCID: PMC3842672 DOI: 10.1186/1710-1492-9-41] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 10/01/2013] [Indexed: 12/27/2022] Open
Abstract
Airway remodeling is not specifically targeted by current asthma medications, partly owing to the lack of understanding of remodeling mechanisms, altogether posing great challenges in asthma treatment. Increased airway smooth muscle (ASM) mass due to hyperplasia/hypertrophy contributes significantly to overall airway remodeling and correlates with decline in lung function. Recent evidence suggests that IgE sensitization can enhance the survival and mediator release in inflammatory cells. Human ASM (HASM) cells express both low affinity (FcεRII/CD23) and high affinity IgE Fc receptors (FcεRI), and IgE can modulate the contractile and synthetic function of HASM cells. IgE was recently shown to induce HASM cell proliferation but the detailed mechanisms remain unknown. We report here that IgE sensitization induces HASM cell proliferation, as measured by 3H-thymidine, EdU incorporation, and manual cell counting. As an upstream signature component of FcεRI signaling, inhibition of spleen tyrosine kinase (Syk) abrogated the IgE-induced HASM proliferation. Further analysis of IgE-induced signaling depicted an IgE-mediated activation of Erk 1/2, p38, JNK MAPK, and Akt kinases. Lastly, lentiviral-shRNA-mediated STAT3 silencing completely abolished the IgE-mediated HASM cell proliferation. Collectively, our data provide mechanisms of a novel function of IgE which may contribute, at least in part, to airway remodeling observed in allergic asthma by directly inducing HASM cell proliferation.
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Affiliation(s)
| | | | | | | | | | | | - Abdelilah S Gounni
- Department of Immunology, Faculty of Medicine, University of Manitoba, 419 Apotex Centre- 750 McDermot Ave, Winnipeg, MB R3E 0T5, Canada.
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Movassagh H, Shan L, Halayko AJ, Roth M, Tamm M, Chakir J, Gounni AS. Neuronal chemorepellent Semaphorin 3E inhibits human airway smooth muscle cell proliferation and migration. J Allergy Clin Immunol 2013; 133:560-7. [PMID: 23932461 DOI: 10.1016/j.jaci.2013.06.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 05/11/2013] [Accepted: 06/11/2013] [Indexed: 01/15/2023]
Abstract
BACKGROUND Chronic airway diseases, including asthma, are characterized by increased airway smooth muscle (ASM) mass that is due in part to growth factor-mediated ASM cell proliferation and migration. However, the molecular mechanisms underlying these effects are not completely understood. Semaphorin 3E (Sema3E) has emerged as an essential mediator involved in cell migration, proliferation, and angiogenesis, although its role in ASM cell function is not investigated. OBJECTIVES We sought to determine the expression of Sema3E receptor, plexinD1, in human ASM cells (HASMCs); effect of Sema3E on basal and platelet-derived growth factor (PDGF)-induced proliferation and migration; and underlying signaling pathways. METHODS Expression of plexinD1 in HASMCs was studied with RT-PCR, immunostaining, and flow cytometry. The effect of Sema3E on HASMC proliferation and migration was evaluated by 5-ethynyl-2'-deoxyuridine (EdU) incorporation, cell count, and Boyden chamber assay. Sema3E-mediated intracellular signaling was investigated with fluorescent microscopy, flow cytometry, Rac1 activation, and Western blot analysis. RESULTS HASMCs from healthy persons expressed plexinD1 more than HASMCs from asthmatic patients. Sema3E increased plexinD1 expression in HASMCs from asthmatic patients. Recombinant Sema3E inhibited PDGF-mediated HASMC proliferation and migration, which was associated with F-actin depolymerization, suppression of PDGF-induced Rac1 guanosine triphosphatase activity, and Akt and extracellular signal-regulated kinase 1 and 2 phosphorylation. Bronchial biopsies from patients with mild asthma displayed immunoreactivity of plexinD1, suggesting the potential in vivo role of Sema3E-PlexinD1 axis in HASMC function. CONCLUSION This study provides the first evidence that Sema3E receptor is expressed and plays functional roles in HASMCs. Our data suggest a regulatory role of Sema3E in PDGF-mediated proliferation and migration, leading to downregulation of ASM remodeling.
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Affiliation(s)
- Hesam Movassagh
- Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Lianyu Shan
- Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Andrew J Halayko
- Department of Physiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Michael Roth
- University Hospital Basel, University of Basel, Basel, Switzerland
| | - Michael Tamm
- University Hospital Basel, University of Basel, Basel, Switzerland
| | - Jamila Chakir
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie du Quebec, Université Laval, Quebec City, Quebec, Canada
| | - Abdelilah S Gounni
- Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada.
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Effects of luteinizing hormone and androgen on the development of rat progenitor Leydig cells in vitro and in vivo. Asian J Androl 2013; 15:685-91. [PMID: 23792342 DOI: 10.1038/aja.2013.55] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 02/16/2013] [Accepted: 04/08/2013] [Indexed: 11/09/2022] Open
Abstract
Progenitor Leydig cells are derived from stem cells. The proliferation and differentiation of progenitor Leydig cells significantly contributes to Leydig cell number during puberty. However, the regulation of these processes remains unclear. The objective of the present study was to determine whether luteinizing hormone (LH) or androgen contributes to the proliferation and differentiation of progenitor Leydig cells. Fourteen-day-old male Sprague-Dawley rats were treated for 7 days with NalGlu, which is a gonadotropin-releasing hormone antagonist, to reduce the secretion of LH in the pituitary and thus, androgen in the testis. Rats were co-administered with LH or 7α-methyl-nortestosterone (MENT), which is an androgen resistant to metabolism by 5α-reductase 1 in progenitor Leydig cells, and the subsequent effects of LH or androgen were measured. (3)H-Thymidine was also intravenously injected into rats to study thymidine incorporation in progenitor Leydig cells. Progenitor Leydig cells were examined. NalGlu administration reduced progenitor Leydig cell proliferation by 83%. In addition, LH or MENT treatment restored Leydig cell proliferative capacity to 73% or 50% of control, respectively. The messenger RNA levels of proliferation-related genes were measured using real-time PCR. The expression levels of Igf1, Lifr, Pdgfra, Bcl2, Ccnd3 and Pcna were upregulated by MENT, and those of Pdgfra, Ccnd3 and Pcna were upregulated by LH. Both LH and MENT stimulated the differentiation of progenitor Leydig cells in vitro. We concluded that both LH and MENT were involved in regulating the development of progenitor Leydig cells.
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