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Diao M, Tao Y, Liu Q, Huang L, Li H, Lin X. Rac1 promotes the lipopolysaccharide-induced inflammatory response and contraction-associated proteins (CAPs) expression in mouse uterine smooth muscle cells. Reprod Biol 2024; 24:100896. [PMID: 38833837 DOI: 10.1016/j.repbio.2024.100896] [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: 09/04/2023] [Revised: 05/11/2024] [Accepted: 05/15/2024] [Indexed: 06/06/2024]
Abstract
Activation of the maternal immune system leads to a downstream cascade of proinflammatory events that culminate in the activation of spontaneous uterine contractions, which is associated with preterm birth. Ras-related C3 botulinum toxin substrate 1 (Rac1) is a crucial protein related to cell contraction and inflammation. The main purpose of this study was to explore the role and function of Rac1's regulation of inflammation through in- vivo and in-vitro experiments. Rac1 inhibitor was used in animal model of preterm birth and cells isolated from the uterine tissues of pregnant mice on gestational day 16 were transfected with adenovirus to knockdown or overexpress Rac1 and treated with the Calcium-calmodulin-dependent protein kinase II (CaMKII) inhibitor KN93. The expression of Rac1, uterine contraction-associated proteins (CAPs) (COX-2 and Connexin43), and inflammatory cytokines, were assessed by Western blotting and RTPCR. LPS upregulated Rac1, COX-2 and Connexin43 expression in uterine smooth muscle cells (USMCs). The expression of inflammatory cytokines, COX-2, and Connexin43 was significantly decreased in shRac1-transfected cells compared with cells stimulated with LPS only. Rac1 overexpression led to an increase in the expression of inflammatory cytokines, COX-2, and Connexin43. Furthermore, after Rac1 overexpression, KN93 reduced the expression of uterine contraction-associated proteins and inflammatory cytokines. It is thought that the effect of Rac1 on inflammatory cytokine and contraction-associated protein expression in USMCs is mediated by CaMKII. Rac1 can modulate the expression of contraction-associated proteins and inflammatory cytokines through the CaMKII pathway. Rac1 could be an effective therapeutic target for improving the outcome of preterm birth.
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Affiliation(s)
- Min Diao
- Department of Anesthesiology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Yunkai Tao
- Department of Anesthesiology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Qian Liu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Lu Huang
- Department of Anesthesiology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Hao Li
- Department of Anesthesiology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Xuemei Lin
- Department of Anesthesiology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China.
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Chen L, Yuan X, He Y, Fan Z, Guan Y, Li Q, Chen Y, Bao L, Huang Y, Lai K. The Expression of Semaphorin3E in Vagal Ganglion and Lung Tissue Is Related to Airway Hyperresponsiveness in Murine Asthma Model. J Immunol Res 2023; 2023:6459234. [PMID: 38111650 PMCID: PMC10727799 DOI: 10.1155/2023/6459234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 10/26/2023] [Accepted: 11/08/2023] [Indexed: 12/20/2023] Open
Abstract
Objective Semaphorin3E (Sema3E) mediates reorganization of the actin cytoskeleton, and plays an important role in ensuring the specificity of synapse formation and angiogenesis. However, the role of Sema3E in allergic asthma (AS) and eosinophilic bronchitis (EB) is still elusive. This study aimed to investigate the relationship between Sema3E in vagal ganglion and lung tissue, airway reactivity, and eosinophilic inflammation. Methods The frequency of coughs and airway reactivity as well as the airway inflammation were observed in ovalbumin- (OVA-) induced AS and EB mouse models. The expression of Sema3E was examined in the vagal ganglion and lung tissues by immunofluorescence staining and western blotting analyses. In the Sema3E treatment protocol, exogenous Sema3E was administrated intranasally before challenge in AS model to study the effect of Sema3E on airway hyperresponsiveness, airway inflammation, mucus production, and collagen deposition. Results The similar higher frequency of coughs and airway eosinophilic inflammation could be seen in AS and EB groups compared with nasal saline (NS) and dexamethasone (DXM) groups. The absence of the airway hyperresponsiveness was observed in EB and DXM group, while AS group showed increase in airway reactivity to methacholine. The expression of Sema3E in vagal ganglion and lung tissue was remarkably decreased in AS and DXM group compared with EB group. Sema3E-treated asthma mice displayed ameliorated airway hyperresponsiveness, mucus production, and collagen deposition. Conclusion Sema3E in lungs and vagal ganglia is related to eosinophilic inflammation and has a protective effect on OVA-induced AHR in asthma.
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Affiliation(s)
- Liyan Chen
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
- Shenzhen Hyzen Hospital, Shenzhen 518000, Guangdong, China
| | - Xiaohui Yuan
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
| | - Yaowei He
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
- Guangdong Second Provincial General Hospital, Guangzhou 510317, Guangdong, China
| | - Zichuan Fan
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
| | - Ya Guan
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
| | - Qiuying Li
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
| | - Yaying Chen
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
| | - Lianglan Bao
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
| | - Yidan Huang
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
- The Affiliated Dongguan Houjie Hospital of Guangdong Medical University, Dongguan 523945, Guangdong, China
| | - Kefang Lai
- The First Affiliated Hospital of Guangzhou Medical University, National Center of Respiratory Medicine, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou 510120, Guangdong, China
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Yang G, Li J, Liu Y, Wu G, Mo L, Xu Z, Liao Y, Huang Q, Yang P. Targeting the RhoA-GEF-H1 pathway of mast cells attenuates experimental airway allergy. Arch Biochem Biophys 2023; 741:109597. [PMID: 37054768 DOI: 10.1016/j.abb.2023.109597] [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: 01/29/2023] [Revised: 04/02/2023] [Accepted: 04/04/2023] [Indexed: 04/15/2023]
Abstract
Mast cells are the major effector cells in allergic diseases. RhoA and its downstream pathway is associated with the pathogenesis of airway allergy. The objective of this study is to test a hypothesis that modulating the RhoA-GEF-H1 axis in mast cells can attenuate airway allergy. An airway allergic disorder (AAD) mouse model was employed. Mast cells were isolated from AAD mouse airway tissues to be analyzed by RNA sequencing. We observed that mast cells isolated from the respiratory tract of AAD mice were resistant to apoptosis. Mast cell mediator levels in nasal lavage fluid were correlated with apoptosis resistance in AAD mice. Activation of RhoA in AAD mast cells was related to resistance to apoptosis. Mast cells isolated from the airway tissues in AAD mouse exhibited strong RhoA-GEF-H1 expression. The RhoA-GEF-H1 axis was associated with the lower FasL expression in AAD mast cells. Activation of the RhoA-GEF-H1 axis promoted the production of mediators in mast cells. Inhibition of GEF-H1 facilitated the SIT-induced mast cell apoptosis and enhanced the therapeutic efficacy of AAD. In conclusion, RhoA-GEF-H1 activities are associated with resistance to apoptosis in mast cells isolated from sites of allergic lesions. The state of apoptosis resistance in mast cells is associated with the state of AAD disease. Inhibition of GEF-H1 restores the sensitivity of mast cells to apoptosis inducers, and alleviates experimental AAD in mice.
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Affiliation(s)
- Gui Yang
- Department of Otolaryngology and Allergy, Longgang Central Hospital, Shenzhen, China
| | - Jianxiang Li
- Department of General Practice Medicine, Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Yu Liu
- Department of Otolaryngology, Jinjiang Municipal Hospital, Jinjiang, China
| | - Gaohui Wu
- Department of Otolaryngology, Jinjiang Municipal Hospital, Jinjiang, China
| | - Lihua Mo
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen, China; Institute of Allergy & Immunology of Shenzhen University, State Key Laboratory of Respiratory Disease Allergy Division at Shenzhen University, Shenzhen, China
| | - Ziyi Xu
- Vanke Meisha Academy, Shenzhen, China
| | - Yun Liao
- Department of Otolaryngology and Allergy, Longgang Central Hospital, Shenzhen, China
| | - Qinmiao Huang
- Department of General Practice Medicine, Third Affiliated Hospital of Shenzhen University, Shenzhen, China.
| | - Pingchang Yang
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen, China; Institute of Allergy & Immunology of Shenzhen University, State Key Laboratory of Respiratory Disease Allergy Division at Shenzhen University, Shenzhen, China.
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Miki H, Kiosses WB, Manresa MC, Gupta RK, Sethi GS, Herro R, Da Silva Antunes R, Dutta P, Miller M, Fung K, Chawla A, Dobaczewska K, Ay F, Broide DH, Tumanov AV, Croft M. Lymphotoxin beta receptor signaling directly controls airway smooth muscle deregulation and asthmatic lung dysfunction. J Allergy Clin Immunol 2023; 151:976-990.e5. [PMID: 36473503 PMCID: PMC10081945 DOI: 10.1016/j.jaci.2022.11.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 10/25/2022] [Accepted: 11/18/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Dysregulation of airway smooth muscle cells (ASM) is central to the severity of asthma. Which molecules dominantly control ASM in asthma is unclear. High levels of the cytokine LIGHT (aka TNFSF14) have been linked to asthma severity and lower baseline predicted FEV1 percentage, implying that signals through its receptors might directly control ASM dysfunction. OBJECTIVE Our study sought to determine whether signaling via lymphotoxin beta receptor (LTβR) or herpesvirus entry mediator from LIGHT dominantly drives ASM hyperreactivity induced by allergen. METHODS Conditional knockout mice deficient for LTβR or herpesvirus entry mediator in smooth muscle cells were used to determine their role in ASM deregulation and airway hyperresponsiveness (AHR) in vivo. Human ASM were used to study signals induced by LTβR. RESULTS LTβR was strongly expressed in ASM from normal and asthmatic subjects compared to several other receptors implicated in smooth muscle deregulation. Correspondingly, conditional deletion of LTβR only in smooth muscle cells in smMHCCreLTβRfl/fl mice minimized changes in their numbers and mass as well as AHR induced by house dust mite allergen in a model of severe asthma. Intratracheal LIGHT administration independently induced ASM hypertrophy and AHR in vivo dependent on direct LTβR signals to ASM. LIGHT promoted contractility, hypertrophy, and hyperplasia of human ASM in vitro. Distinguishing LTβR from the receptors for IL-13, TNF, and IL-17, which have also been implicated in smooth muscle dysregulation, LIGHT promoted NF-κB-inducing kinase-dependent noncanonical nuclear factor kappa-light-chain enhancer of activated B cells in ASM in vitro, leading to sustained accumulation of F-actin, phosphorylation of myosin light chain kinase, and contractile activity. CONCLUSIONS LTβR signals directly and dominantly drive airway smooth muscle hyperresponsiveness relevant for pathogenesis of airway remodeling in severe asthma.
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Affiliation(s)
- Haruka Miki
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif
| | | | - Mario C Manresa
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif
| | - Rinkesh K Gupta
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif
| | - Gurupreet S Sethi
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif
| | - Rana Herro
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif
| | | | - Paramita Dutta
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif
| | - Marina Miller
- Department of Medicine, University of California-San Diego, San Diego, Calif
| | - Kai Fung
- Bioinformatics Core, La Jolla Institute for Immunology, La Jolla, Calif
| | - Ashu Chawla
- Bioinformatics Core, La Jolla Institute for Immunology, La Jolla, Calif
| | | | - Ferhat Ay
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif
| | - David H Broide
- Department of Medicine, University of California-San Diego, San Diego, Calif
| | - Alexei V Tumanov
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center, San Antonio, Tex
| | - Michael Croft
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, Calif; Department of Medicine, University of California-San Diego, San Diego, Calif.
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Shouib R, Eitzen G. Cdc42 regulates cytokine expression and trafficking in bronchial epithelial cells. Front Immunol 2022; 13:1069499. [PMID: 36618374 PMCID: PMC9816864 DOI: 10.3389/fimmu.2022.1069499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/30/2022] [Indexed: 12/25/2022] Open
Abstract
Airway epithelial cells can respond to incoming pathogens, allergens and stimulants through the secretion of cytokines and chemokines. These pro-inflammatory mediators activate inflammatory signaling cascades that allow a robust immune response to be mounted. However, uncontrolled production and release of cytokines and chemokines can result in chronic inflammation and appears to be an underlying mechanism for the pathogenesis of pulmonary disorders such as asthma and COPD. The Rho GTPase, Cdc42, is an important signaling molecule that we hypothesize can regulate cytokine production and release from epithelial cells. We treated BEAS-2B lung epithelial cells with a set of stimulants to activate inflammatory pathways and cytokine release. The production, trafficking and secretion of cytokines were assessed when Cdc42 was pharmacologically inhibited with ML141 drug or silenced with lentiviral-mediated shRNA knockdown. We found that Cdc42 inhibition with ML141 differentially affected gene expression of a subset of cytokines; transcription of IL-6 and IL-8 were increased while MCP-1 was decreased. However, Cdc42 inhibition or depletion disrupted IL-8 trafficking and reduced its secretion even though transcription was increased. Cytokines transiting through the Golgi were particularly affected by Cdc42 disruption. Our results define a role for Cdc42 in the regulation of cytokine production and release in airway epithelial cells. This underscores the role of Cdc42 in coupling receptor activation to downstream gene expression and also as a regulator of cytokine secretory pathways.
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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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MicroRNA-98-5p Inhibits IL-13-Induced Proliferation and Migration of Human Airway Smooth Muscle Cells by Targeting RAC1. Inflammation 2022; 45:1548-1558. [PMID: 35304668 DOI: 10.1007/s10753-022-01640-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 01/24/2022] [Accepted: 01/28/2022] [Indexed: 11/05/2022]
Abstract
The dysfunction of airway smooth muscle cells (ASMCs) is one of the key factors in the pathogenesis of asthma. How miR-98-5p works in asthma has not been completely elucidated. This work focused on how miR-98-5p functions in the proliferation and migration of human ASMCs treated with interleukin-13 (IL-13). MiR-98-5p expression in plasma of asthmatic patients and IL-13-stimulated ASMCs was probed by quantitative real-time polymerase chain reaction (qRT-PCR). RAS-relevant C3 botulinum toxin substrate 1 (RAC1) protein expression in ASMCs was assessed by Western blot. The growth of ASMCs was measured by cell counting kit-8 (CCK-8) assay and 5-ethynyl-2'-deoxyuridine (EdU) assay. The migration of ASMCs was examined by Transwell assay. Besides, the apoptosis of ASMCs was analyzed by flow cytometry. The targeting relationship between miR-98-5p and RAC1 3'-UTR was verified by a dual-luciferase reporter gene assay. MiR-98-5p expression was reduced in patients' plasma and IL-13-stimulated ASMCs, and RAC1 expression was upregulated in ASMCs treated with IL-13. MiR-98-5p overexpression inhibited IL-13-induced proliferation and migration of ASMCs while promoting the apoptosis. The opposite result was observed after inhibiting miR-98-5p expression. Besides, RAC1 was identified as a direct downstream target of miR-98-5p in ASMCs. The restoration of RAC1 expression counteracted the impacts of miR-98-5p overexpression on IL-13-stimulated proliferation, migration, and apoptosis of ASMCs. MiR-98-5p inhibits IL-13-induced proliferation and migration and accelerates the apoptosis of ASMCs by downregulating RAC1 expression.
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Hassoun D, Loirand G, Sauzeau V. Un nouvel acteur physiopathologique dans l’asthme sévère : la GTPase Rac. Rev Mal Respir 2022; 39:100-103. [DOI: 10.1016/j.rmr.2022.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 01/05/2022] [Indexed: 10/19/2022]
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Messelodi D, Giuliani C, Cipriani F, Armuzzi S, di Palmo E, Garagnani P, Bertelli L, Astolfi A, Luiselli D, Ricci G, Pession A. C5 and SRGAP3 Polymorphisms Are Linked to Paediatric Allergic Asthma in the Italian Population. Genes (Basel) 2022; 13:genes13020214. [PMID: 35205259 PMCID: PMC8871526 DOI: 10.3390/genes13020214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 02/01/2023] Open
Abstract
Asthma is a complex and heterogeneous disease, caused by the interaction between genetic and environmental factors with a predominant allergic background in children. The role of specific genes in asthmatic bronchial reactivity is still not clear, probably because of the many common pathways shared with other allergic disorders. This study is focused on 11 SNPs possibly related to asthma that were previously identified in a GWAS study. The genetic variability of these SNPs has been analysed in a population of 773 Italian healthy controls, and the presence of an association between the polymorphisms and the asthma onset was evaluated performing genotyping analysis on 108 children affected with asthma compared with the controls. Moreover, a pool of 171 patients with only allergic rhinoconjunctivitis has been included in the case–control analysis. The comparison of allele frequencies in asthmatic patients versus healthy controls identified two SNPs—rs1162394 (p = 0.019) and rs25681 (p = 0.044)—associated with the asthmatic condition, which were not differentially distributed in the rhinoconjunctivitis group. The rs25681 SNP, together with three other SNPs, also resulted in not being homogenously distributed in the Italian population. The significantly higher frequency of the rs25681 and rs1162394 SNPs (located, respectively, in the C5 and SRGAP3 genes) in the asthmatic population suggests an involvement of these genes in the asthmatic context, playing a role in increasing the inflammatory condition that may influence asthma onset and clinical course.
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Affiliation(s)
- Daria Messelodi
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy;
| | - Cristina Giuliani
- Laboratory of Molecular Anthropology, Centre for Genome Biology, Department of Biological, Geological and Environmental Sciences, University of Bologna, 40126 Bologna, Italy;
| | - Francesca Cipriani
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (F.C.); (E.d.P.); (L.B.); (A.P.)
| | - Silvia Armuzzi
- Institute of Hematology “Seràgnoli”, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (P.G.); (A.A.)
| | - Emanuela di Palmo
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (F.C.); (E.d.P.); (L.B.); (A.P.)
| | - Paolo Garagnani
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (P.G.); (A.A.)
| | - Luca Bertelli
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (F.C.); (E.d.P.); (L.B.); (A.P.)
| | - Annalisa Astolfi
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (P.G.); (A.A.)
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy
| | - Donata Luiselli
- Laboratory of Ancient DNA (aDNALab), Department of Cultural Heritage (DBC), Ravenna Campus, University of Bologna, 40126 Bologna, Italy;
| | - Giampaolo Ricci
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy;
- Correspondence:
| | - Andrea Pession
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (F.C.); (E.d.P.); (L.B.); (A.P.)
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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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11
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Maltas J, Reed H, Porter A, Malliri A. Mechanisms and consequences of dysregulation of the Tiam family of Rac activators in disease. Biochem Soc Trans 2020; 48:2703-2719. [PMID: 33200195 DOI: 10.1042/bst20200481] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/16/2020] [Accepted: 10/16/2020] [Indexed: 12/14/2022]
Abstract
The Tiam family proteins - Tiam1 and Tiam2/STEF - are Rac1-specific Guanine Nucleotide Exchange Factors (GEFs) with important functions in epithelial, neuronal, immune and other cell types. Tiam GEFs regulate cellular migration, proliferation and survival, mainly through activating and directing Rac1 signalling. Dysregulation of the Tiam GEFs is significantly associated with human diseases including cancer, immunological and neurological disorders. Uncovering the mechanisms and consequences of dysregulation is therefore imperative to improving the diagnosis and treatment of diseases. Here we compare and contrast the subcellular localisation and function of Tiam1 and Tiam2/STEF, and review the evidence for their dysregulation in disease.
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Affiliation(s)
- Joe Maltas
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
| | - Hannah Reed
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
| | - Andrew Porter
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
| | - Angeliki Malliri
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
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12
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Rac1 silencing, NSC23766 and EHT1864 reduce growth and actin organization of bladder smooth muscle cells. Life Sci 2020; 261:118468. [PMID: 32961232 DOI: 10.1016/j.lfs.2020.118468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/07/2020] [Accepted: 09/15/2020] [Indexed: 12/16/2022]
Abstract
AIMS RacGTPase-mediated proliferation and smooth muscle contraction in the lower urinary tract has been recently suggested and may offer putative targets for treamtment of lower urinary tract symptoms. However, RacGTPase function for proliferation of detrusor smooth muscle cells is unknown and the specificity of Rac inhibitors has been questioned. Here, we examined effects of Rac1 knockdown and of the Rac inhibitors NSC23766 and EHT1864 in human bladder smooth muscle cells (hBSMCs). MAIN METHODS Rac1 expression was silenced by shRNA expression. Effects of silencing and Rac inhibitors were assessed by CCK-8 assay, EdU staining, RT-PCR, colony formation assay, flow cytometry, and phalloidin staining. KEY FINDINGS Silencing of Rac1 expression reduced the viability (up to 83% compared to scramble shRNA) and proliferation (virtually completely in proliferation assay), increased apoptosis (124%) and the number of dead cells (51%), and caused breakdown of actin organization (56% reduction of polymerized actin compared to scramble shRNA). Effects on proliferation, viability, and actin organization were mimicked by NSC23766 and EHT1864, while both compounds showed divergent effects on cell death (32-fold increase of dead cells by EHT1864, but not NSC23766). Effects of NSC23766 and EHT1864 on viability of hBSMCs were not altered by Rac1 knockdown. SIGNIFICANCE Rac1 promotes proliferation, viability, and cytoskeletal organization, and suppresses apoptosis in bladder smooth muscle cells, which may be relevant in overactive bladder or diabetes-related bladder dysfunction. NSC23766 and EHT1864 mimick these effects, but may act Rac1-independently, by shared and divergent effects.
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13
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Baker MJ, Cooke M, Kreider-Letterman G, Garcia-Mata R, Janmey PA, Kazanietz MG. Evaluation of active Rac1 levels in cancer cells: A case of misleading conclusions from immunofluorescence analysis. J Biol Chem 2020; 295:13698-13710. [PMID: 32817335 DOI: 10.1074/jbc.ra120.013919] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 07/23/2020] [Indexed: 12/16/2022] Open
Abstract
A large number of aggressive cancer cell lines display elevated levels of activated Rac1, a small GTPase widely implicated in cytoskeleton reorganization, cell motility, and metastatic dissemination. A commonly accepted methodological approach for detecting Rac1 activation in cancer cells involves the use of a conformation-sensitive antibody that detects the active (GTP-bound) Rac1 without interacting with the GDP-bound inactive form. This antibody has been extensively used in fixed cell immunofluorescence and immunohistochemistry. Taking advantage of prostate and pancreatic cancer cell models known to have high basal Rac1-GTP levels, here we have established that this antibody does not recognize Rac1 but rather detects the intermediate filament protein vimentin. Indeed, Rac1-null PC3 prostate cancer cells or cancer models with low levels of Rac1 activation still show a high signal with the anti-Rac1-GTP antibody, which is lost upon silencing of vimentin expression. Moreover, this antibody was unable to detect activated Rac1 in membrane ruffles induced by epidermal growth factor stimulation. These results have profound implications for the study of this key GTPase in cancer, particularly because a large number of cancer cell lines with characteristic mesenchymal features show simultaneous up-regulation of vimentin and high basal Rac1-GTP levels when measured biochemically. This misleading correlation can lead to assumptions about the validity of this antibody and inaccurate conclusions that may affect the development of appropriate therapeutic approaches for targeting the Rac1 pathway.
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Affiliation(s)
- Martin J Baker
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - Mariana Cooke
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Medicine, Einstein Medical Center Philadelphia, Philadelphia, Pennsylvania, USA
| | | | | | - Paul A Janmey
- Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Marcelo G Kazanietz
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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14
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Li B, Wang R, Wang Y, Stief CG, Hennenberg M. Regulation of smooth muscle contraction by monomeric non-RhoA GTPases. Br J Pharmacol 2020; 177:3865-3877. [PMID: 32579705 PMCID: PMC7429483 DOI: 10.1111/bph.15172] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/05/2020] [Accepted: 06/09/2020] [Indexed: 12/13/2022] Open
Abstract
Smooth muscle contraction in the cardiovascular system, airways, prostate and lower urinary tract is involved in the pathophysiology of many diseases, including cardiovascular and obstructive lung disease plus lower urinary tract symptoms, which are associated with high prevalence of morbidity and mortality. This prominent clinical role of smooth muscle tone has led to the molecular mechanisms involved being subjected to extensive research. In general smooth muscle contraction is promoted by three major signalling pathways, including the monomeric GTPase RhoA pathway. However, emerging evidence suggests that monomeric GTPases other than RhoA may be involved in signal transduction in smooth muscle contraction, including Rac GTPases, cell division control protein 42 homologue, adenosine ribosylation factor 6, Ras, Rap1b and Rab GTPases. Here, we review these emerging functions of non-RhoA GTPases in smooth muscle contraction, which has now become increasingly more evident and constitutes an emerging and innovative research area of high clinical relevance.
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Affiliation(s)
- Bingsheng Li
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Ruixiao Wang
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Yiming Wang
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Christian G Stief
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Martin Hennenberg
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
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15
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Li B, Yu Q, Wang R, Gratzke C, Wang X, Spek A, Herlemann A, Tamalunas A, Strittmatter F, Waidelich R, Stief CG, Hennenberg M. Inhibition of Female and Male Human Detrusor Smooth Muscle Contraction by the Rac Inhibitors EHT1864 and NSC23766. Front Pharmacol 2020; 11:409. [PMID: 32317972 PMCID: PMC7154109 DOI: 10.3389/fphar.2020.00409] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/18/2020] [Indexed: 12/14/2022] Open
Abstract
Introduction Lower urinary tract symptoms (LUTS) due to overactive bladder (OAB) are caused by spontaneous detrusor contractions. Medical treatment with muscarinic receptor antagonists or β3-adrenoceptor agonists aims to inhibit detrusor contractions, but overall results are unsatisfactory. Consequently, improved understanding of bladder smooth muscle contraction and identification of novel compounds for its inhibition are needed to develop alternative options. A role of the GTPase Rac1 for smooth muscle contraction has been reported from the prostate, but is unknown in the human detrusor. Here, we examined effects of the Rac inhibitors NSC23766, which may also antagonize muscarinic receptors, and EHT1864 on contraction of human detrusor tissues. Methods Female and male human detrusor tissues were obtained from radical cystectomy. Effects of NSC23766 (100 µM) and EHT1864 (100 µM) on detrusor contractions were studied in an organ bath. Results Electric field stimulation induced frequency-dependent contractions of detrusor tissues, which were inhibited by NSC23766 and EHT1864. Carbachol induced concentration-dependent contractions. Concentration response curves for carbachol were shifted to the right by NSC23766, reflected by increased EC50 values, but unchanged Emax values. EHT1864 reduced carbachol-induced contractions, resulting in reduced Emax values for carbachol. The thromboxane analog U46619 induced concentration-dependent contractions, which remained unchanged by NSC23766, but were reduced by EHT1864. Conclusions NSC23766 and EHT1864 inhibit female and male human detrusor contractions. NSC23766, but not EHT1864 competitively antagonizes muscarinic receptors. In addition to neurogenic and cholinergic contractions, EHT1864 inhibits thromboxane A2-induced detrusor contractions. The latter may be promising, as the origin of spontaneous detrusor contractions in OAB is noncholinergic. In vivo, both compounds may improve OAB-related LUTS.
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Affiliation(s)
- Bingsheng Li
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Qingfeng Yu
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Ruixiao Wang
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Christian Gratzke
- Department of Urology, University Hospital, LMU Munich, Munich, Germany.,Department of Urology, University of Freiburg, Freiburg, Germany
| | - Xiaolong Wang
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Annabel Spek
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Annika Herlemann
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | | | | | | | - Christian G Stief
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Martin Hennenberg
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
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16
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Yu Q, Gratzke C, Wang R, Li B, Kuppermann P, Herlemann A, Tamalunas A, Wang Y, Rutz B, Ciotkowska A, Wang X, Strittmatter F, Waidelich R, Stief CG, Hennenberg M. A NAV2729-sensitive mechanism promotes adrenergic smooth muscle contraction and growth of stromal cells in the human prostate. J Biol Chem 2019; 294:12231-12249. [PMID: 31243101 DOI: 10.1074/jbc.ra119.007958] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 06/19/2019] [Indexed: 12/25/2022] Open
Abstract
Voiding symptoms in benign prostatic hyperplasia (BPH) are driven by prostate smooth muscle contraction and prostate growth. Smooth muscle contraction in the prostate and other organs critically depends on activation of the small monomeric GTPase RhoA and probably Rac1. A role of another GTPase, ADP-ribosylation factor 6 (ARF6), for smooth muscle contraction has been recently suggested by indirect evidence but remains to be proven for any organ. Here, we report effects of NAV2729, an inhibitor with assumed specificity for ARF6, in human prostate tissues and cultured prostate stromal cells (WPMY-1). NAV2729 (5 μm) inhibited neurogenic and α1-adrenergic contractions of human prostate tissues. Contractions induced by endothelin-1, by the thromboxane A2 agonist U46619, or by high molar KCl were not inhibited. Correlation analyses suggested up-regulation of prostatic ARF6 expression with increasing degree of BPH, as ARF6 expression increased with the content of prostate-specific antigen (PSA) of prostate tissues. NAV2729 inhibited ARF6 activity but not other GTPases (ARF1, RhoA, Rac1) in prostate tissues and in WPMY-1 cells. Proliferation of WPMY-1 cells was inhibited concentration-dependently by NAV2726, as reflected by decreased viability, 5-ethynyl-2'-deoxyuridine (EdU) assay, colony formation assay, and expression of Ki-67. Silencing of ARF6 expression mimicked effects of NAV2729 on viability and in the EdU assay. Effects of NAV2729 on viability and proliferation were attenuated in cells with silenced ARF6 expression. Our findings suggest that a NAV2729-sensitive mechanism promotes adrenergic contraction and stromal cell growth in the human prostate, which is probably ARF6-mediated. Similar actions in other organs and urodynamic effects of NAV2729 appear possible.
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Affiliation(s)
- Qingfeng Yu
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany; Department of Urology and Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Christian Gratzke
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany; Department of Urology, University of Freiburg, Freiburg 79106, Germany
| | - Ruixiao Wang
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Bingsheng Li
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Paul Kuppermann
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Annika Herlemann
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Alexander Tamalunas
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Yiming Wang
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Beata Rutz
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Anna Ciotkowska
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Xiaolong Wang
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Frank Strittmatter
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Raphaela Waidelich
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Christian G Stief
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Martin Hennenberg
- Department of Urology, University Hospital, LMU Munich, 81377 Munich, Germany.
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17
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Klein M, Magnan A, Bouchaud G. [Allergen-derived peptide: A promising approach in asthma]. Rev Mal Respir 2019; 36:442-446. [PMID: 31006580 DOI: 10.1016/j.rmr.2019.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 03/01/2019] [Indexed: 10/27/2022]
Abstract
Severe asthma required high dose of corticosteroids combined with biotherapies to control more or less asthma symptoms and lead to the decrease of patients' quality of life on long term. Recent studies show that hypoallergenic peptides derived from allergen can prevent airway hyperresponsiveness, decrease Th2 response and also allergen-specific IgE in mouse models of allergic asthma. Even if some peptides mechanisms remain unknown, their fast efficacy with low doses of allergens make peptide immunotherapy a new promising approach in allergic asthma.
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Affiliation(s)
- M Klein
- Inserm UMR 1087/CNRS UMR6291, IRS, institut du thorax, université de Nantes, 8, quai Moncousu, BP 70721, 44007 Nantes cedex 1, France
| | - A Magnan
- Inserm UMR 1087/CNRS UMR6291, IRS, institut du thorax, université de Nantes, 8, quai Moncousu, BP 70721, 44007 Nantes cedex 1, France; Service de pneumologie, institut du thorax, CHU de Nantes, 44000 Nantes, France
| | - G Bouchaud
- Inra, UR 1268 BIA, 44316 Nantes, France.
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18
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Klein M, Dijoux E, Dilasser F, Hassoun D, Moui A, Loirand G, Colas L, Magnan A, Sauzeau V, Bouchaud G. [New protagonists in asthma pathophysiology]. Presse Med 2019; 48:255-261. [PMID: 30857807 DOI: 10.1016/j.lpm.2019.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 12/14/2018] [Accepted: 01/31/2019] [Indexed: 12/21/2022] Open
Abstract
Asthma is often associated with a Th2-type immune response with well-known cellular and molecular actors such as eosinophils, Th2 lymphocytes and associated cytokines such as interleukin-5 or IL-4. Nevertheless, some of the asthmatic patients show clinical manifestations and characteristics that do not correspond to the current pattern of the pathophysiology of asthma. Thus, recently new cellular and molecular actors in the development of asthma have been demonstrated in animal models and in humans. Among these are components of the innate immune system such as type 2 innate lymphoid cells or adaptive immune system such as Th9 lymphocytes. At the cellular level, the role of small G proteins in asthma is also highlighted as well as the role of major cytokines like IL-17 or those derived from the epithelium. A better knowledge of the physiopathology of asthma and the taking into account of these new actors allows the identification of new therapeutic targets for different endotypes of patients.
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Affiliation(s)
- Martin Klein
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France
| | - Eléonore Dijoux
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France
| | - Florian Dilasser
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France
| | - Dorian Hassoun
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France; L'institut du thorax, CHU de Nantes, service de pneumologie, 44000 Nantes, France
| | - Antoine Moui
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France; L'institut du thorax, CHU de Nantes, service de pneumologie, 44000 Nantes, France
| | - Gervaise Loirand
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France
| | - Luc Colas
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France; L'institut du thorax, CHU de Nantes, service de pneumologie, 44000 Nantes, France
| | - Antoine Magnan
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France; L'institut du thorax, CHU de Nantes, service de pneumologie, 44000 Nantes, France
| | - Vincent Sauzeau
- L'institut du thorax, Inserm, CNRS, université de Nantes, 44000 Nantes, France
| | - Grégory Bouchaud
- INRA, UR1268 BIA, rue de la Géraudière, BP 71627, 44316 Nantes, France.
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19
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Neonatal Streptococcus pneumoniae Pneumonia Induces an Aberrant Airway Smooth Muscle Phenotype and AHR in Mice Model. BIOMED RESEARCH INTERNATIONAL 2019; 2019:1948519. [PMID: 30723734 PMCID: PMC6339730 DOI: 10.1155/2019/1948519] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/12/2018] [Accepted: 12/23/2018] [Indexed: 12/21/2022]
Abstract
Our previous study showed that neonatal S. pneumoniae infection aggravated airway inflammation and airway hyperresponsiveness (AHR) in an OVA-induced allergic asthma model. As airway smooth muscle (ASM) plays a pivotal role in AHR development, we aim to investigate the effects of neonatal S. pneumoniae pneumonia on ASM structure and AHR development. Non-lethal neonatal pneumonia was established by intranasally infecting 1-week-old BALB/C mice with the S. pneumoniae strain D39. Five weeks after infection, the lungs were collected to assess the levels of α-SMA and the contractile proteins of ASM. Our results indicate that neonatal S. pneumoniae pneumonia significantly increased adulthood lung α-SMA and SMMHC proteins production and aggravated airway inflammatory cells infiltration and cytokines release. In addition, the neonatal S. pneumoniae pneumonia group had significantly higher Penh values compared to the uninfected controls. These data suggest that neonatal S. pneumoniae pneumonia promoted an aberrant ASM phenotype and AHR development in mice model.
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20
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Yang JQ, Kalim KW, Li Y, Duan X, Nguyen P, Khurana Hershey GK, Kroner J, Ruff B, Zhang L, Salomonis N, Rochman M, Wen T, Zheng Y, Guo F. Rational targeting Cdc42 restrains Th2 cell differentiation and prevents allergic airway inflammation. Clin Exp Allergy 2018; 49:92-107. [PMID: 30307073 DOI: 10.1111/cea.13293] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/26/2018] [Accepted: 07/25/2018] [Indexed: 12/24/2022]
Abstract
BACKGROUND Asthma is an allergic airway inflammation-driven disease that affects more than 300 million people world-wide. Targeted therapies for asthma are largely lacking. Although asthma symptoms can be prevented from worsening, asthma development cannot be prevented. Cdc42 GTPase has been shown to regulate actin cytoskeleton, cell proliferation and survival. OBJECTIVES To investigate the role and targeting of Cdc42 in Th2 cell differentiation and Th2-mediated allergic airway inflammation. METHODS Post-thymic Cdc42-deficient mice were generated by crossing Cdc42flox/flox mice with dLckicre transgenic mice in which Cre expression is driven by distal Lck promoter. Effects of post-thymic Cdc42 deletion and pharmacological targeting Cdc42 on Th2 cell differentiation were evaluated in vitro under Th2-polarized culture conditions. Effects of post-thymic Cdc42 deletion and pharmacological targeting Cdc42 on allergic airway inflammation were evaluated in ovalbumin- and/or house dust mite-induced mouse models of asthma. RESULTS Post-thymic deletion of Cdc42 led to reduced peripheral CD8+ T cells and attenuated Th2 cell differentiation, with no effect on closely related Th1, Th17 and induced regulatory T (iTreg) cells. Post-thymic Cdc42 deficiency ameliorated allergic airway inflammation. The selective inhibition of Th2 cell differentiation by post-thymic deletion of Cdc42 was recapitulated by pharmacological targeting of Cdc42 with CASIN, a Cdc42 activity-specific chemical inhibitor. CASIN also alleviated allergic airway inflammation. CASIN-treated Cdc42-deficient mice showed comparable allergic airway inflammation to vehicle-treated Cdc42-deficient mice, indicative of negligible off-target effect of CASIN. CASIN had no effect on established allergic airway inflammation. CONCLUSION AND CLINICAL RELEVANCE Cdc42 is required for Th2 cell differentiation and allergic airway inflammation, and rational targeting Cdc42 may serve as a preventive but not therapeutic approach for asthma control.
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Affiliation(s)
- Jun-Qi Yang
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, Cincinnati, Ohio.,Key Laboratory of National Health Commission on Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasitic and Vector Control, Jiangsu Institute of Parasitic Diseases and Public Health Research Center, Jiangnan University, Wuxi, Jiangsu, China
| | - Khalid W Kalim
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Yuan Li
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Xin Duan
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Phuong Nguyen
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, Cincinnati, Ohio
| | | | - John Kroner
- Division of Asthma Research, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Brandy Ruff
- Division of Asthma Research, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Li Zhang
- Department of Environmental Health, University of Cincinnati, Cincinnati, Ohio
| | - Nathan Salomonis
- Division of Biomedical Informatics, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Mark Rochman
- Division of Allergy and Immunology, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Ting Wen
- Division of Allergy and Immunology, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Yi Zheng
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, Cincinnati, Ohio
| | - Fukun Guo
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, Cincinnati, Ohio
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21
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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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22
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Grayson MH, Feldman S, Prince BT, Patel PJ, Matsui EC, Apter AJ. Advances in asthma in 2017: Mechanisms, biologics, and genetics. J Allergy Clin Immunol 2018; 142:1423-1436. [PMID: 30213625 DOI: 10.1016/j.jaci.2018.08.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/22/2018] [Accepted: 08/31/2018] [Indexed: 02/07/2023]
Abstract
This review summarizes some of the most significant advances in asthma research over the past year. We first focus on novel discoveries in the mechanism of asthma development and exacerbation. This is followed by a discussion of potential new biomarkers, including the use of radiographic markers of disease. Several new biologics have become available to the clinician in the past year, and we summarize these advances and how they can influence the clinical delivery of asthma care. After this, important findings in the genetics of asthma and heterogeneity in phenotypes of the disease are explored, as is the role the environment plays in shaping the development and exacerbation of asthma. Finally, we conclude with a discussion of advances in health literacy and how they will affect asthma care.
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Affiliation(s)
- Mitchell H Grayson
- Division of Allergy and Immunology, Department of Pediatrics, Nationwide Children's Hospital, Ohio State University College of Medicine, Columbus, Ohio.
| | - Scott Feldman
- Section of Allergy and Immunology, Division of Pulmonary Allergy Critical Care Medicine, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pa
| | - Benjamin T Prince
- Division of Allergy and Immunology, Department of Pediatrics, Nationwide Children's Hospital, Ohio State University College of Medicine, Columbus, Ohio
| | - Priya J Patel
- Section of Allergy and Immunology, Division of Pulmonary Allergy Critical Care Medicine, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pa
| | - Elizabeth C Matsui
- Department of Population Health, Dell Medical School, University of Texas-Austin, Austin, Tex
| | - Andrea J Apter
- Section of Allergy and Immunology, Division of Pulmonary Allergy Critical Care Medicine, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pa
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