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Du X, Yang Y, Yang M, Yuan L, Wang L, Wu M, Zhou K, Li W, Xiang Y, Qu X, Liu H, Qin X, Liu C. ITGB4 deficiency induces mucus hypersecretion by upregulating MUC5AC in RSV-infected airway epithelial cells. Int J Biol Sci 2022; 18:349-359. [PMID: 34975337 PMCID: PMC8692133 DOI: 10.7150/ijbs.66215] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 10/20/2021] [Indexed: 12/13/2022] Open
Abstract
Respiratory syncytial virus (RSV) infection is the main cause of bronchiolitis in children. Excessive mucus secretion is one of the primary symbols in RSV related lower respiratory tract infections (RSV-related LRTI), which is closely associated with the occurrence and development of asthma in later life. Integrin β4 (ITGB4) is down-regulated in the airway epithelial cells (AECs) of asthma patients which plays a critical role in the pathogenesis of asthma. However, whether ITGB4 is involved in the pathological processes of RSV infection remains unclear. In this study, we found that decreased expression of ITGB4 was negatively correlated with the level of MUC5AC in childhood AECs following RSV infection. Moreover, ITGB4 deficiency led to mucus hypersecretion and MUC5AC overexpression in the small airway of RSV-infected mice. MUC5AC expression was upregulated by ITGB4 in HBE cells through EGFR, ERK and c-Jun pathways. EGFR inhibitors treatment inhibited mucus hypersecretion and MUC5AC overexpression in ITGB4-deficient mice after RSV infection. Together, these results demonstrated that epithelial ITGB4 deficiency induces mucus hypersecretion by upregulating the expression of MUC5AC through EGFR/ERK/c-Jun pathway, which further associated with RSV-related LRTI.
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Affiliation(s)
- Xizi Du
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Yu Yang
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Ming Yang
- Centre for Asthma and Respiratory Disease, School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, University of Newcastle and Hunter Medical Research Institute, Callaghan, New South Wales, Australia
| | - Lin Yuan
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Leyuan Wang
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Mengping Wu
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Kai Zhou
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Wenkai Li
- Department of Pediatrics, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China
| | - Yang Xiang
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Xiangping Qu
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Huijun Liu
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Xiaoqun Qin
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China
| | - Chi Liu
- Department of Physiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China.,Research Center of China-Africa Infectious Diseases, Xiangya School of Medicine Central South University, Changsha, Hunan, China
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Milici A, Sanchez A, Talavera K. Silica Nanoparticles Inhibit Responses to ATP in Human Airway Epithelial 16HBE Cells. Int J Mol Sci 2021; 22:10173. [PMID: 34576336 PMCID: PMC8467126 DOI: 10.3390/ijms221810173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 09/16/2021] [Indexed: 11/16/2022] Open
Abstract
Because of their low cost and easy production, silica nanoparticles (SiNPs) are widely used in multiple manufacturing applications as anti-caking, densifying and hydrophobic agents. However, this has increased the exposure levels of the general population and has raised concerns about the toxicity of this nanomaterial. SiNPs affect the function of the airway epithelium, but the biochemical pathways targeted by these particles remain largely unknown. Here we investigated the effects of SiNPs on the responses of 16HBE14o- cultured human bronchial epithelial (16HBE) cells to the damage-associated molecular pattern ATP, using fluorometric measurements of intracellular Ca2+ concentration. Upon stimulation with extracellular ATP, these cells displayed a concentration-dependent increase in intracellular Ca2+, which was mediated by release from intracellular stores. SiNPs inhibited the Ca2+ responses to ATP within minutes of application and at low micromolar concentrations, which are significantly faster and more potent than those previously reported for the induction of cellular toxicity and pro-inflammatory responses. SiNPs-induced inhibition is independent from the increase in intracellular Ca2+ they produce, is largely irreversible and occurs via a non-competitive mechanism. These findings suggest that SiNPs reduce the ability of airway epithelial cells to mount ATP-dependent protective responses.
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Affiliation(s)
| | | | - Karel Talavera
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, VIB Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium; (A.M.); (A.S.)
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Advances in TRP channel drug discovery: from target validation to clinical studies. Nat Rev Drug Discov 2021; 21:41-59. [PMID: 34526696 PMCID: PMC8442523 DOI: 10.1038/s41573-021-00268-4] [Citation(s) in RCA: 193] [Impact Index Per Article: 64.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2021] [Indexed: 12/20/2022]
Abstract
Transient receptor potential (TRP) channels are multifunctional signalling molecules with many roles in sensory perception and cellular physiology. Therefore, it is not surprising that TRP channels have been implicated in numerous diseases, including hereditary disorders caused by defects in genes encoding TRP channels (TRP channelopathies). Most TRP channels are located at the cell surface, which makes them generally accessible drug targets. Early drug discovery efforts to target TRP channels focused on pain, but as our knowledge of TRP channels and their role in health and disease has grown, these efforts have expanded into new clinical indications, ranging from respiratory disorders through neurological and psychiatric diseases to diabetes and cancer. In this Review, we discuss recent findings in TRP channel structural biology that can affect both drug development and clinical indications. We also discuss the clinical promise of novel TRP channel modulators, aimed at both established and emerging targets. Last, we address the challenges that these compounds may face in clinical practice, including the need for carefully targeted approaches to minimize potential side-effects due to the multifunctional roles of TRP channels.
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Milici A, Talavera K. TRP Channels as Cellular Targets of Particulate Matter. Int J Mol Sci 2021; 22:2783. [PMID: 33803491 PMCID: PMC7967245 DOI: 10.3390/ijms22052783] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/02/2021] [Accepted: 03/05/2021] [Indexed: 02/07/2023] Open
Abstract
Particulate matter (PM) is constituted by particles with sizes in the nanometer to micrometer scales. PM can be generated from natural sources such as sandstorms and wildfires, and from human activities, including combustion of fuels, manufacturing and construction or specially engineered for applications in biotechnology, food industry, cosmetics, electronics, etc. Due to their small size PM can penetrate biological tissues, interact with cellular components and induce noxious effects such as disruptions of the cytoskeleton and membranes and the generation of reactive oxygen species. Here, we provide an overview on the actions of PM on transient receptor potential (TRP) proteins, a superfamily of cation-permeable channels with crucial roles in cell signaling. Their expression in epithelial cells and sensory innervation and their high sensitivity to chemical, thermal and mechanical stimuli makes TRP channels prime targets in the major entry routes of noxious PM, which may result in respiratory, metabolic and cardiovascular disorders. On the other hand, the interactions between TRP channel and engineered nanoparticles may be used for targeted drug delivery. We emphasize in that much further research is required to fully characterize the mechanisms underlying PM-TRP channel interactions and their relevance for PM toxicology and biomedical applications.
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Affiliation(s)
| | - Karel Talavera
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB Center for Brain & Disease Research, 3000 Leuven, Belgium;
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Kim SS, Kim CH, Kim JW, Kung HC, Park TW, Shin YS, Kim JD, Ryu S, Kim WJ, Choi YH, Song KS. Airborne particulate matter increases MUC5AC expression by downregulating Claudin-1 expression in human airway cells. BMB Rep 2018; 50:516-521. [PMID: 28946937 PMCID: PMC5683821 DOI: 10.5483/bmbrep.2017.50.10.100] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Indexed: 12/15/2022] Open
Abstract
CLB2.0, a constituent of PM, induces secretion of multiple cytokines and chemokines that regulate airway inflammation. Specifically, IL-6 upregulates CLB2.0-induced MUC5AC and MUC1 expression. Interestingly, of the tight junction proteins examined, claudin-1 expression was inhibited by CLB2.0. While the overexpression of claudin-1 decreased CLB2.0-induced MUC5AC expression, it increased the expression of the anti-inflammatory mucin, MUC1. CLB2.0-induced IL-6 secretion was mediated by ROS. The ROS scavenger N-acetylcysteine inhibited CLB2.0-induced IL-6 secretion, thereby decreasing the CLB2.0-induced MUC5AC expression, whereas CLB2.0-induced MUC1 expression increased. CLB2.0 activated the ERK1/2 MAPK via a ROS-dependent pathway. ERK1/2 downregulated the claudin-1 and MUC1 expressions, whereas it dramatically increased CLB2.0-induced MUC5AC expression. These findings suggest that CLB2.0-induced ERK1/2 activation acts as a switch for regulating inflammatory conditions though a ROS-dependent pathway. Our data also suggest that secreted IL-6 regulates CLB2.0-induced MUC5AC and MUC1 expression via ROS-mediated downregulation of claudin-1 expression to maintain mucus homeostasis in the airway.
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Affiliation(s)
- Sang-Su Kim
- Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan 49267, Korea
| | - Cheol Hong Kim
- Department of Pediatrics, Sungkyunkwan University Samsung Changwon Hospital, Changwon 51353, Korea
| | - Ji Wook Kim
- Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan 49267, Korea
| | - Hsi Chiang Kung
- Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan 49267, Korea
| | - Tae Woo Park
- Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan 49267, Korea
| | - Yu Som Shin
- Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan 49267, Korea
| | - Ju Deok Kim
- Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan 49267, Korea
| | - Siejeong Ryu
- Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan 49267, Korea
| | - Wang-Joon Kim
- Department of Physiology, Kosin University College of Medicine, Busan 49267, Korea
| | - Yung Hyun Choi
- Department of Biochemistry, College of Korean Medicine, Don-Eui University, Busan 47227, Korea
| | - Kyoung Seob Song
- Department of Physiology, Kosin University College of Medicine, Busan 49267; Institute of Medicine, Kosin University College of Medicine, Busan 49267, Korea
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Chen ZH, Wu YF, Wang PL, Wu YP, Li ZY, Zhao Y, Zhou JS, Zhu C, Cao C, Mao YY, Xu F, Wang BB, Cormier SA, Ying SM, Li W, Shen HH. Autophagy is essential for ultrafine particle-induced inflammation and mucus hyperproduction in airway epithelium. Autophagy 2016; 12:297-311. [PMID: 26671423 DOI: 10.1080/15548627.2015.1124224] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Environmental ultrafine particulate matter (PM) is capable of inducing airway injury, while the detailed molecular mechanisms remain largely unclear. Here, we demonstrate pivotal roles of autophagy in regulation of inflammation and mucus hyperproduction induced by PM containing environmentally persistent free radicals in human bronchial epithelial (HBE) cells and in mouse airways. PM was endocytosed by HBE cells and simultaneously triggered autophagosomes, which then engulfed the invading particles to form amphisomes and subsequent autolysosomes. Genetic blockage of autophagy markedly reduced PM-induced expression of inflammatory cytokines, e.g. IL8 and IL6, and MUC5AC in HBE cells. Mice with impaired autophagy due to knockdown of autophagy-related gene Becn1 or Lc3b displayed significantly reduced airway inflammation and mucus hyperproduction in response to PM exposure in vivo. Interference of the autophagic flux by lysosomal inhibition resulted in accumulated autophagosomes/amphisomes, and intriguingly, this process significantly aggravated the IL8 production through NFKB1, and markedly attenuated MUC5AC expression via activator protein 1. These data indicate that autophagy is required for PM-induced airway epithelial injury, and that inhibition of autophagy exerts therapeutic benefits for PM-induced airway inflammation and mucus hyperproduction, although they are differentially orchestrated by the autophagic flux.
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Affiliation(s)
- Zhi-Hua Chen
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Yin-Fang Wu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Ping-Li Wang
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Yan-Ping Wu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Zhou-Yang Li
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Yun Zhao
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Jie-Sen Zhou
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Chen Zhu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Chao Cao
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Yuan-Yuan Mao
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Feng Xu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Bei-Bei Wang
- b Core Facilities, Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Stephania A Cormier
- c Department of Pediatrics , University of Tennessee Health Science Center, Children's Foundation Research Institute , Memphis , TN , USA
| | - Song-Min Ying
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Wen Li
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang
| | - Hua-Hao Shen
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital Zhejiang University School of Medicine , Hangzhou , Zhejiang.,d State Key Lab of Respiratory Disease, National Clinical Research Center for Respiratory Disease , Guangzhou , China
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Zhao L, Zhang X, Kuang H, Wu J, Guo Y, Ma L. Effect of TRPV1 channel on the proliferation and apoptosis in asthmatic rat airway smooth muscle cells. Exp Lung Res 2013; 39:283-94. [PMID: 23919305 DOI: 10.3109/01902148.2013.813610] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND Hyperplasia of airway smooth muscle cells (ASMC) is a major contributor to airway remodeling in asthma. Transient receptor potential vanilloid 1 (TRPV1) is an important channel to mediate Ca(2+) influx. This study explores the expression of TRPV1 channel and its effect on the proliferation and apoptosis in rat ASMC, in order to find a new target to treat airway remodeling in asthma. METHODS Rats were sensitized and challenged with ovalbumin to replicate asthmatic models. Proliferating cell nuclear antigen (PCNA) was detected by immunohistochemistry. Reverse transcriptase-polymerase chain reaction, immunocytochemistry, and Western blot were used to detect the mRNA and protein expression of TRPV1 channel. Intracellular calcium ([Ca(2+)]i) was detected using confocal fluorescence Ca(2+) imaging. [(3)H] thymidine incorporation and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay were used to observe the DNA synthesis and proliferation. TUNEL assay was used to detect the apoptosis of ASMC. RESULTS (1) The expression of PCNA was significantly increased in intact asthmatic rat ASMC. (2) The expression of TRPV1 channel was significantly increased in asthmatic rat ASMC. (3) [Ca(2+)]i in ASMC of the asthmatic group was significantly increased. After treatment with TRPV1 agonist capsaicin (CAP), [Ca(2+)]i was further increased, whereas [Ca(2+)]i was decreased after administration of TRPV1 antagonist capsazepine (CPZ) in ASMC of the asthmatic group. (4) The DNA synthesis and absorbance of MTT were significantly increased, while apoptosis was significantly decreased in asthmatic ASMC. CAP further enhanced proliferation and decreased apoptosis. CPZ significantly inhibited the effect of CAP in asthmatic ASMC. CONCLUSION TRPV1 channel was involved in the regulation of proliferation and apoptosis in asthmatic ASMC.
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Affiliation(s)
- Limin Zhao
- Department of Respiratory and Critical Care Medicine, Zhengzhou University People's Hospital, Zhengzhou, Henan, China
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