Ubiquitin carboxyl-terminal hydrolase isozyme L1/UCHL1 suppresses epithelial–mesenchymal transition and is under-expressed in cadmium-transformed human bronchial epithelial cells

Cadmium (Cd), a highly toxic heavy metal, is widespreadly distributed in the environment. Chronic exposure to Cd is associated with the development of several diseases including cancers. Over the decade, many researches have been carried on various models to examine the acute effects of Cd; yet, lim...

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Veröffentlicht in:Cell biology and toxicology 2021-08, Vol.37 (4), p.497-513
Hauptverfasser: Wu, Dan-Dan, Xu, Yan-Ming, Chen, De-Ju, Liang, Zhan-Ling, Chen, Xu-Li, Hylkema, Machteld N., Rots, Marianne G., Li, Sheng-Qing, Lau, Andy T. Y.
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container_issue 4
container_start_page 497
container_title Cell biology and toxicology
container_volume 37
creator Wu, Dan-Dan
Xu, Yan-Ming
Chen, De-Ju
Liang, Zhan-Ling
Chen, Xu-Li
Hylkema, Machteld N.
Rots, Marianne G.
Li, Sheng-Qing
Lau, Andy T. Y.
description Cadmium (Cd), a highly toxic heavy metal, is widespreadly distributed in the environment. Chronic exposure to Cd is associated with the development of several diseases including cancers. Over the decade, many researches have been carried on various models to examine the acute effects of Cd; yet, limited knowledge is known about the long-term Cd exposure, especially in the human lung cells. Previously, we showed that chronic Cd-exposed human bronchial epithelial BEAS-2B cells exhibited transformed cell properties, such as anchorage-independent growth, augmented cell migration, and epithelial–mesenchymal transition (EMT). To study these Cd-transformed cells more comprehensively, here, we further characterized their subproteomes. Overall, a total of 63 differentially expressed proteins between Cd-transformed and passage-matched control cells among the five subcellular fractions (cytoplasmic, membrane, nuclear-soluble, chromatin-bound, and cytoskeletal) were identified by mass spectrometric analysis and database searching. Interestingly, we found that the thiol protease ubiquitin carboxyl-terminal hydrolase isozyme L1 (UCHL1) is one of the severely downregulated proteins in the Cd-transformed cells. Notably, the EMT phenotype of Cd-transformed cells can be suppressed by forced ectopic expression of UCHL1, suggesting UCHL1 as a crucial modulator in the maintenance of the proper differentiation status in lung epithelial cells. Since EMT is considered as a critical step during malignant cell transformation, finding novel cellular targets that can antagonize this transition may lead to more efficient strategies to inhibit cancer development. Our data report for the first time that UCHL1 may play a function in the suppression of EMT in Cd-transformed human lung epithelial cells, indicating that UCHL1 might be a new therapeutic target for chronic Cd-induced carcinogenesis. Graphical abstract
doi_str_mv 10.1007/s10565-020-09560-2
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Y.</creator><creatorcontrib>Wu, Dan-Dan ; Xu, Yan-Ming ; Chen, De-Ju ; Liang, Zhan-Ling ; Chen, Xu-Li ; Hylkema, Machteld N. ; Rots, Marianne G. ; Li, Sheng-Qing ; Lau, Andy T. Y.</creatorcontrib><description>Cadmium (Cd), a highly toxic heavy metal, is widespreadly distributed in the environment. Chronic exposure to Cd is associated with the development of several diseases including cancers. Over the decade, many researches have been carried on various models to examine the acute effects of Cd; yet, limited knowledge is known about the long-term Cd exposure, especially in the human lung cells. Previously, we showed that chronic Cd-exposed human bronchial epithelial BEAS-2B cells exhibited transformed cell properties, such as anchorage-independent growth, augmented cell migration, and epithelial–mesenchymal transition (EMT). To study these Cd-transformed cells more comprehensively, here, we further characterized their subproteomes. Overall, a total of 63 differentially expressed proteins between Cd-transformed and passage-matched control cells among the five subcellular fractions (cytoplasmic, membrane, nuclear-soluble, chromatin-bound, and cytoskeletal) were identified by mass spectrometric analysis and database searching. Interestingly, we found that the thiol protease ubiquitin carboxyl-terminal hydrolase isozyme L1 (UCHL1) is one of the severely downregulated proteins in the Cd-transformed cells. Notably, the EMT phenotype of Cd-transformed cells can be suppressed by forced ectopic expression of UCHL1, suggesting UCHL1 as a crucial modulator in the maintenance of the proper differentiation status in lung epithelial cells. Since EMT is considered as a critical step during malignant cell transformation, finding novel cellular targets that can antagonize this transition may lead to more efficient strategies to inhibit cancer development. Our data report for the first time that UCHL1 may play a function in the suppression of EMT in Cd-transformed human lung epithelial cells, indicating that UCHL1 might be a new therapeutic target for chronic Cd-induced carcinogenesis. Graphical abstract</description><identifier>ISSN: 0742-2091</identifier><identifier>EISSN: 1573-6822</identifier><identifier>DOI: 10.1007/s10565-020-09560-2</identifier><identifier>PMID: 33040242</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Acute effects ; Biochemistry ; Biology ; Biomedical and Life Sciences ; Cadmium ; Cadmium - toxicity ; Cancer ; Carcinogenesis ; Carcinogens ; Cell adhesion &amp; migration ; Cell Biology ; Cell differentiation ; Cell migration ; Cell Movement ; Chromatin ; Chronic exposure ; Cytoplasmic membranes ; Cytoskeleton ; Database searching ; DNA methylation ; Ectopic expression ; Epithelial Cells ; Epithelial-Mesenchymal Transition ; Epithelium ; Exposure ; Gene expression ; Heavy metals ; Humans ; Hydrolase ; Life Sciences ; Lungs ; Mesenchyme ; Original Article ; Pharmacology/Toxicology ; Phenotypes ; Proteins ; Proteomics ; Reagents ; Spectrometry ; Therapeutic targets ; Tobacco ; Transformed cells ; Ubiquitin ; Ubiquitin Thiolesterase - genetics</subject><ispartof>Cell biology and toxicology, 2021-08, Vol.37 (4), p.497-513</ispartof><rights>Springer Nature B.V. 2020</rights><rights>2020. 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Y.</creatorcontrib><title>Ubiquitin carboxyl-terminal hydrolase isozyme L1/UCHL1 suppresses epithelial–mesenchymal transition and is under-expressed in cadmium-transformed human bronchial epithelial cells</title><title>Cell biology and toxicology</title><addtitle>Cell Biol Toxicol</addtitle><addtitle>Cell Biol Toxicol</addtitle><description>Cadmium (Cd), a highly toxic heavy metal, is widespreadly distributed in the environment. Chronic exposure to Cd is associated with the development of several diseases including cancers. Over the decade, many researches have been carried on various models to examine the acute effects of Cd; yet, limited knowledge is known about the long-term Cd exposure, especially in the human lung cells. Previously, we showed that chronic Cd-exposed human bronchial epithelial BEAS-2B cells exhibited transformed cell properties, such as anchorage-independent growth, augmented cell migration, and epithelial–mesenchymal transition (EMT). To study these Cd-transformed cells more comprehensively, here, we further characterized their subproteomes. Overall, a total of 63 differentially expressed proteins between Cd-transformed and passage-matched control cells among the five subcellular fractions (cytoplasmic, membrane, nuclear-soluble, chromatin-bound, and cytoskeletal) were identified by mass spectrometric analysis and database searching. Interestingly, we found that the thiol protease ubiquitin carboxyl-terminal hydrolase isozyme L1 (UCHL1) is one of the severely downregulated proteins in the Cd-transformed cells. Notably, the EMT phenotype of Cd-transformed cells can be suppressed by forced ectopic expression of UCHL1, suggesting UCHL1 as a crucial modulator in the maintenance of the proper differentiation status in lung epithelial cells. Since EMT is considered as a critical step during malignant cell transformation, finding novel cellular targets that can antagonize this transition may lead to more efficient strategies to inhibit cancer development. Our data report for the first time that UCHL1 may play a function in the suppression of EMT in Cd-transformed human lung epithelial cells, indicating that UCHL1 might be a new therapeutic target for chronic Cd-induced carcinogenesis. 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Previously, we showed that chronic Cd-exposed human bronchial epithelial BEAS-2B cells exhibited transformed cell properties, such as anchorage-independent growth, augmented cell migration, and epithelial–mesenchymal transition (EMT). To study these Cd-transformed cells more comprehensively, here, we further characterized their subproteomes. Overall, a total of 63 differentially expressed proteins between Cd-transformed and passage-matched control cells among the five subcellular fractions (cytoplasmic, membrane, nuclear-soluble, chromatin-bound, and cytoskeletal) were identified by mass spectrometric analysis and database searching. Interestingly, we found that the thiol protease ubiquitin carboxyl-terminal hydrolase isozyme L1 (UCHL1) is one of the severely downregulated proteins in the Cd-transformed cells. 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ispartof Cell biology and toxicology, 2021-08, Vol.37 (4), p.497-513
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subjects Acute effects
Biochemistry
Biology
Biomedical and Life Sciences
Cadmium
Cadmium - toxicity
Cancer
Carcinogenesis
Carcinogens
Cell adhesion & migration
Cell Biology
Cell differentiation
Cell migration
Cell Movement
Chromatin
Chronic exposure
Cytoplasmic membranes
Cytoskeleton
Database searching
DNA methylation
Ectopic expression
Epithelial Cells
Epithelial-Mesenchymal Transition
Epithelium
Exposure
Gene expression
Heavy metals
Humans
Hydrolase
Life Sciences
Lungs
Mesenchyme
Original Article
Pharmacology/Toxicology
Phenotypes
Proteins
Proteomics
Reagents
Spectrometry
Therapeutic targets
Tobacco
Transformed cells
Ubiquitin
Ubiquitin Thiolesterase - genetics
title Ubiquitin carboxyl-terminal hydrolase isozyme L1/UCHL1 suppresses epithelial–mesenchymal transition and is under-expressed in cadmium-transformed human bronchial epithelial cells
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