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Sun C, Pan Q, Du M, Zheng J, Bai M, Sun W. Decoding the roles of heat shock proteins in liver cancer. Cytokine Growth Factor Rev 2024; 75:81-92. [PMID: 38182465 DOI: 10.1016/j.cytogfr.2023.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 01/07/2024]
Abstract
Hepatocellular carcinoma (HCC) is one of the most common gastrointestinal malignancies, characterized by insidious onset and high propensity for metastasis and recurrence. Apart from surgical resection, there are no effective curative methods for HCC in recent years, due to resistance to radiotherapy and chemotherapy. Heat shock proteins (HSP) play a crucial role in maintaining cellular homeostasis and normal organism development as molecular chaperones for intracellular proteins. Both basic research and clinical data have shown that HSPs are crucial participants in the HCC microenvironment, as well as the occurrence, development, metastasis, and resistance to radiotherapy and chemotherapy in various malignancies, particularly liver cancer. This review aims to discuss the molecular mechanisms and potential clinical value of HSPs in HCC, which may provide new insights for HSP-based therapeutic interventions for HCC.
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Affiliation(s)
- Chen Sun
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Qi Pan
- Department of Hepatobiliary Surgery and Organ Transplantation, First Hospital of China Medical University, Shenyang 110004, China
| | - Mingyang Du
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Jiahe Zheng
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Ming Bai
- Second Department of Medical Oncology, the First Hospital of China Medical University, Shenyang 110001, China.
| | - Wei Sun
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China.
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Kumar N, Krishnani KK, Gupta SK, Singh NP. Effects of silver nanoparticles on stress biomarkers of Channa striatus: immuno-protective or toxic? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:14813-14826. [PMID: 29541984 DOI: 10.1007/s11356-018-1628-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 02/27/2018] [Indexed: 05/22/2023]
Abstract
Nanotechnology is a novel arena with promising applications in the field of medicine, industry, and agriculture including fisheries. Cross-disciplinary interactions and the application of this technology in biological systems have led to the innovation of novel nanoparticle antioxidants, which are the subject of our study. In context with above background, we designed an experiment on nano-silver to elucidate its role for mitigation of abiotic and biotic stress. Three diets were formulated viz. silver nanoparticles (Ag-NPs) incorporated at 0.5 and 1 mg/kg diet and control diet (Ag-NPs at 0 mg/kg). Fish were exposed to sublethal level of 1/25th of LC50 (4 ppm) of lead (Pb) and temperature at 34 °C. The effect of Ag-NPs on productive performance (weight gain %, feed conversion ratio, protein efficiency ratio, and specific growth rate), stress biomarkers (catalase, super oxide dismutase, glutathione-s-transferase, acetylcholine esterase, cortisol, heat shock protein), biochemical and immunological response (protein and carbohydrate metabolic enzymes, phagocytic activity, serum total protein and albumin: globulin ratio), histopathology alterations in the liver and gill as well as survival of Channa striatus, following challenge with pathogenic bacteria were evaluated. Dietary Ag-NPs at 0.5-mg supplementation improved growth performance, immunity, survival, and reduced stress biomarker such as HSP 70, cortisol, and blood glucose in various fish tissues. Exposure to Pb and high temperature and group fed with Ag-NPs (1 mg/kg diet) demonstrated remarkable changes in the histo-architect of liver such as pyknotic nuclei, pyknosis, leucocyte infiltration, hemorrhage and karyokinesis, blood vessels with nucleated, lipid vacuoles in the liver tissue. Histology of gill displayed hyperplasia, aneurism, blood congestion, severe telengiectiasis, epithelial lifting, curling of secondary lamella, hyperplasia of epithelial cell of secondary lamella in the group exposed to lead and high temperature and supplemented with Ag-NPs at 1 mg/kg diet. In addition to histopathology, feeding with Ag-NPs at 1 mg/kg diet deteriorated and altered all studied parameters including reduced growth performance. Results obtained in the present study suggest that supplementation of Ag-NPs at 0.5 mg/kg diet has a definitive role to play in the mitigation of abiotic and biotic stress in C. striatus.
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Affiliation(s)
- Neeraj Kumar
- ICAR-National Institute of Abiotic Stress Management, Baramati, Pune, 413 115, India.
| | | | - Sanjay Kumar Gupta
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, 834 010, India
| | - Narendra Pratap Singh
- ICAR-National Institute of Abiotic Stress Management, Baramati, Pune, 413 115, India
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Abstract
Heat shock protein 70 (Hsp70) is the most ubiquitous stress-inducible chaperone. It accumulates in the cells in response to a wide variety of physiological and environmental insults including anticancer chemotherapy, thus allowing the cell to survive to lethal conditions. Intracellular Hsp70 is viewed as a cytoprotective protein. Indeed, this protein can inhibit key effectors of the apoptotic and autophagy machineries. In cancer cells, the expression of Hsp70 is abnormally high, and Hsp70 may participate in oncogenesis and in resistance to chemotherapy. In rodent models, Hsp70 overexpression increases tumor growth and metastatic potential. Depletion or inhibition of Hsp70 frequently reduces the size of the tumors and can even cause their complete involution. However, HSP70 is also found in the extra-cellular space where it may signal via membrane receptors or endosomes to alter gene transcription and cellular function. Overall, Hsp70 extracellular function is believed to be immnunogenic and the term chaperokine to define the extracellular chaperones such as Hsp70 has been advanced. In this chapter the knowledge to date, as well as some emerging paradigms about the intra- and extra-cellular functions of Hsp70, are presented. The strategies targeting Hsp70 that are being developed in cancer therapy will also be discussed.
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Affiliation(s)
- Christophe Boudesco
- Univ. Bourgogne Franche-Comté, LNC UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- Equipe Labellisée par la Ligue Nationale Contre le Cancer, INSERM, LNC UMR1231, Dijon, France
- LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | - Sebastien Cause
- Univ. Bourgogne Franche-Comté, LNC UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- Equipe Labellisée par la Ligue Nationale Contre le Cancer, INSERM, LNC UMR1231, Dijon, France
- LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | - Gaëtan Jego
- Univ. Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.
- INSERM, LNC UMR1231, Dijon, France.
- Equipe Labellisée par la Ligue Nationale Contre le Cancer, INSERM, LNC UMR1231, Dijon, France.
- LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France.
| | - Carmen Garrido
- Univ. Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.
- INSERM, LNC UMR1231, Dijon, France.
- Equipe Labellisée par la Ligue Nationale Contre le Cancer, INSERM, LNC UMR1231, Dijon, France.
- LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France.
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Kumar S, Stokes J, Singh UP, Scissum Gunn K, Acharya A, Manne U, Mishra M. Targeting Hsp70: A possible therapy for cancer. Cancer Lett 2016; 374:156-166. [PMID: 26898980 PMCID: PMC5553548 DOI: 10.1016/j.canlet.2016.01.056] [Citation(s) in RCA: 162] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 01/28/2016] [Accepted: 01/31/2016] [Indexed: 01/13/2023]
Abstract
In all organisms, heat-shock proteins (HSPs) provide an ancient defense system. These proteins act as molecular chaperones by assisting proper folding and refolding of misfolded proteins and aid in the elimination of old and damaged cells. HSPs include Hsp100, Hsp90, Hsp70, Hsp40, and small HSPs. Through its substrate-binding domains, Hsp70 interacts with wide spectrum of molecules, ranging from unfolded to natively folded and aggregated proteins, and provides cytoprotective role against various cellular stresses. Under pathophysiological conditions, the high expression of Hsp70 allows cells to survive with lethal injuries. Increased Hsp70, by interacting at several points on apoptotic signaling pathways, leads to inhibition of apoptosis. Elevated expression of Hsp70 in cancer cells may be responsible for tumorigenesis and for tumor progression by providing resistance to chemotherapy. In contrast, inhibition or knockdown of Hsp70 reduces the size of tumors and can cause their complete regression. Moreover, extracellular Hsp70 acts as an immunogen that participates in cross presentation of MHC-I molecules. The goals of this review are to examine the roles of Hsp70 in cancer and to present strategies targeting Hsp70 in the development of cancer therapeutics.
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Affiliation(s)
- Sanjay Kumar
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA
| | - James Stokes
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA
| | - Udai P Singh
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29208, USA
| | - Karyn Scissum Gunn
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA
| | - Arbind Acharya
- Centre of Advance Study in Zoology, Faculty of Science, Banaras Hindu University, Varanasi 221 005, India
| | - Upender Manne
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Manoj Mishra
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA.
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Sun Y, Zhou Q. Uptake and translocation of benzo[a]pyrene (B[a]P) in two ornamental plants and dissipation in soil. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 124:74-81. [PMID: 26476328 DOI: 10.1016/j.ecoenv.2015.09.037] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 09/21/2015] [Accepted: 09/22/2015] [Indexed: 06/05/2023]
Abstract
Pot experiments were conducted to evaluate the phytoremediation of B[a]P contaminated soil using two ornamental plants (Tagetes patula and Mirabilis jalapa). The results showed that the dry biomass of two plants was increased at low B[a]P contaminated soil and then inhibited with increasing B[a]P concentrations. It exhibited a significantly positive linear relationship between B[a]P absorption in roots, stems, leaves and shoots of the tested plants and the concentration of B[a]P in soils (P<0.01). Meanwhile, the contents of B[a]P in different tissues of the plants increased with growing time. After planting T. patula and M. jalapa, plant-promoted biodegradation of B[a]P was account for 79.5-99.8% and 71.1-99.9%, respectively, whereas the amount of B[a]P dissipation enhancement was only 0.2-20.5% and 0.1-28.9%, respectively. Moreover, low bioaccumulation factor (BF) and translocation factor (TF) values indicated that T. patula and M. jalapa took up B[a]P from contaminated soil and transferred them to the aerial parts with low efficiency. The B[a]P removal rates in rhizosphere soils at different growing stages of T. patula and M. jalapa were 2.7-26.8% and 0.4%-33.9%, respectively, higher than those of non-rhizopshere soils. Therefore, the presence of T. patula and M. jalapa roots was effective in promoting the phytoremediation of B[a]P contaminated soils.
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Affiliation(s)
- Yuebing Sun
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environment Pollution Institute, Ministry of Agriculture, Tianjin 300191, China; Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Qixing Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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6
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Environmental carcinogens and mutational pathways in atherosclerosis. Int J Hyg Environ Health 2015; 218:293-312. [DOI: 10.1016/j.ijheh.2015.01.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 01/26/2015] [Accepted: 01/29/2015] [Indexed: 02/07/2023]
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7
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Jiang Y, Shan S, Gan T, Zhang X, Lu X, Hu H, Wu Y, Sheng J, Yang J. Effects of cisplatin on the contractile function of thoracic aorta of Sprague-Dawley rats. Biomed Rep 2014; 2:893-897. [PMID: 25279165 DOI: 10.3892/br.2014.349] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 07/10/2014] [Indexed: 02/07/2023] Open
Abstract
DNA-damaging agents have been reported to be associated with cardiovascular complications, however, the underlying mechanisms remain to be clarified. In the present study, the possible vascular effects of cisplatin was assessed by measuring its effects on the contractile function of thoracic aortic rings dissected from Sprague-Dawley (SD) rats. Contraction of the aortic ring was induced by 60 mM KCl or 10-6 M phenylephrine (PE) in an ex vivo perfusion system. Cisplatin (200 μM) counteracted KCl- and PE-induced contraction by 57.6 and 91.8%, respectively, in endothelium-intact aortic rings. Similar results were obtained in endothelium-denuded aortas. Electromicroscopy analysis revealed severe damage to blood vessel walls in vivo by cisplatin. In addition, cisplatin significantly inhibited adenosine triphosphate (ATP)-induced intracellular Ca2+ concentration ([Ca2+]i) increases in human umbilical vein endothelial cells (HUVECs). These results suggested that the DNA-damaging agent cisplatin can affect the contractile function of thoracic aortas. In addition, in accordance with its DNA-damaging properties, the cardiovascular toxicity of cisplatin may be the result of its direct cytotoxicity.
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Affiliation(s)
- Ying Jiang
- The First Affiliated Hospital, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China ; Suzhou Biological Technology Co., Ltd., of Centre Testing International Corporation, Kunshan, Jiangsu 215300, P.R. China
| | - Shigang Shan
- The First Affiliated Hospital, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China ; Department of Toxicology, Hangzhou Normal University School of Public Health, Hangzhou, Zhejiang 310036, P.R. China
| | - Tieer Gan
- The First Affiliated Hospital, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Xiaoyun Zhang
- The First Affiliated Hospital, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Xianghong Lu
- Department of Pharmacy, Lishui People's Hospital, Lishui, Zhejiang 323000, P.R. China
| | - Hu Hu
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, P.R. China
| | - Yihua Wu
- The First Affiliated Hospital, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Jianzhong Sheng
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, P.R. China
| | - Jun Yang
- The First Affiliated Hospital, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China ; Department of Toxicology, Hangzhou Normal University School of Public Health, Hangzhou, Zhejiang 310036, P.R. China
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Xin L, Wang J, Wu Y, Guo S, Tong J. Increased oxidative stress and activated heat shock proteins in human cell lines by silver nanoparticles. Hum Exp Toxicol 2014; 34:315-23. [PMID: 24980441 DOI: 10.1177/0960327114538988] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Due to widely commercial applications of silver nanoparticles (Ag NPs), toxicity assessment of this NP is of great importance. This study aimed to investigate the oxidative stress and heat shock response of Ag NPs at different doses to A549 and HepG2 cells. After treatment with different concentrations of Ag NPs for 24 h, oxidative damage indicated by malondialdehyde (MDA), 8-epi-PGF2α, and 8-hydroxy-2'-deoxyguanosine (8-oxo-dG) concentrations and protein levels of heat shock protein A1A (HSPA1A) and heme oxygenase 1 (HO-1) were determined. Ag NPs induced dose-dependent increases in MDA, 8-epi-PGF2α, and 8-oxo-dG concentrations in both A549 and HepG2 cells. Stress-inducible HSPA1A and HO-1 were also significantly upregulated in a dose-dependent manner. A higher level of HSPA1A and HO-1 activation by Ag NPs occurred in HepG2 cells than that in A549 cells. Compared with that of HSPA1A, Ag NPs induced a stronger increase in protein level of HO-1 in both cell lines. Significant positive correlations between protein levels of HSPA1A and HO-1 and oxidative damage were also observed. In conclusion, Ag NPs could induce oxidative stress in human cell lines. In addition to the products of oxidative stress such as MDA and 8-oxo-dG, HSPs can be used as potential biomarkers in nanotoxicity assessment, especially HO-1.
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Affiliation(s)
- L Xin
- School of Public Health, Medical College of Soochow University, Suzhou, China
| | - J Wang
- KunShan Health Inspection Station, Jiangsu, China
| | - Y Wu
- School of Public Health, Medical College of Soochow University, Suzhou, China
| | - S Guo
- School of Public Health, Medical College of Soochow University, Suzhou, China
| | - J Tong
- School of Public Health, Medical College of Soochow University, Suzhou, China
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Metallothionein mRNA induction is correlated with the decrease of DNA strand breaks in cadmium exposed zebra mussels. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2014; 766:10-5. [DOI: 10.1016/j.mrgentox.2014.03.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/17/2014] [Accepted: 03/19/2014] [Indexed: 11/17/2022]
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Mayati A, Le Ferrec E, Lagadic-Gossmann D, Fardel O. Aryl hydrocarbon receptor-independent up-regulation of intracellular calcium concentration by environmental polycyclic aromatic hydrocarbons in human endothelial HMEC-1 cells. ENVIRONMENTAL TOXICOLOGY 2012; 27:556-62. [PMID: 21452393 DOI: 10.1002/tox.20675] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) such as benzo(a)pyrene (B(a)P) constitute a major family of widely-distributed environmental toxic contaminants, known as potent ligands of the aryl hydrocarbon receptor (AhR). B(a)P has been recently shown to trigger an early and transient increase of intracellular calcium concentration ([Ca(2+)](i)), involved in AhR-related up-regulation of target genes by B(a)P. This study was designed to determine whether AhR may play a role in [Ca(2+)](i) induction provoked by B(a)P. We demonstrated that, in addition to B(a)P, various PAHs, including pyrene and benzo(e)pyrene, known to not or only very poorly interact with AhR, similarly up-regulated [Ca(2+)](i) in human endothelial HMEC-1 cells. Moreover, α-naphthoflavone, a flavonoïd antagonist of AhR, was also able to induce [Ca(2+)](i). Knocking-down AhR expression in HMEC-1 cells through transfection of siRNAs, was finally demonstrated to not prevent B(a)P-mediated induction of [Ca(2+)](i), whereas it efficiently counteracted B(a)P-mediated induction of the referent AhR target gene cytochrome P-450 1B1. Taken together, these data demonstrate that environmental PAHs trigger [Ca(2+)](i) induction in an AhR-independent manner.
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Mayati A, Levoin N, Paris H, N'Diaye M, Courtois A, Uriac P, Lagadic-Gossmann D, Fardel O, Le Ferrec E. Induction of intracellular calcium concentration by environmental benzo(a)pyrene involves a β2-adrenergic receptor/adenylyl cyclase/Epac-1/inositol 1,4,5-trisphosphate pathway in endothelial cells. J Biol Chem 2011; 287:4041-52. [PMID: 22167199 DOI: 10.1074/jbc.m111.319970] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) such as benzo(a)pyrene (B(a)P) are widely distributed environmental contaminants, known as potent ligands of the aryl hydrocarbon receptor (AhR). These chemicals trigger an early and transient increase of intracellular calcium concentration ([Ca(2+)](i)), required for AhR-related effects of PAHs. The mechanisms involved in this calcium mobilization were investigated in the present study. We demonstrated that B(a)P-mediated [Ca(2+)](i) induction was prevented in endothelial HMEC-1 cells by counteracting β2-adrenoreceptor (β2ADR) activity using pharmacological antagonists, anti-β2ADR antibodies, or siRNA-mediated knockdown of β2ADR expression; by contrast, it was strongly potentiated by β2ADR overexpression in human kidney HEK293 cells. B(a)P was shown, moreover, to directly bind to β2ADR, as assessed by in vitro binding assays and molecular modeling. Pharmacological inhibition and/or siRNA-mediated silencing of various signaling actors acting downstream of β2ADR in a sequential manner, such as G protein, adenylyl cyclase, Epac-1 protein, and inositol 1,4,5-trisphosphate (IP(3))/IP(3) receptor, were next demonstrated to prevent B(a)P-induced calcium signal. Inhibition or knockdown of these signaling elements, as well as the use of chemical β-blockers, were finally shown to counteract B(a)P-mediated induction of cytochrome P-450 1B1, a prototypical AhR target gene. Taken together, our results show that B(a)P binds directly to β2ADR and consequently utilizes β2ADR machinery to mobilize [Ca(2+)](i), through activation of a G protein/adenylyl cyclase/cAMP/Epac-1/IP(3) pathway. This β2ADR-dependent signaling pathway activated by PAHs may likely be crucial for PAH-mediated up-regulation of AhR target genes, thus suggesting a contribution of β2ADR to the health-threatening effects of these environmental pollutants.
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Affiliation(s)
- Abdullah Mayati
- INSERM U1085/IRSET, IFR140, Université de Rennes 1, 2 Avenue du Pr. L. Bernard, Rennes 35043, France
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Effects of single-wall carbon nanotubes in human cells of the oral cavity: Geno-cytotoxic risk. Toxicol In Vitro 2011; 25:1811-9. [DOI: 10.1016/j.tiv.2011.09.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 09/14/2011] [Accepted: 09/19/2011] [Indexed: 12/13/2022]
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Abstract
Heat shock protein 70 (Hsp70) is a powerful chaperone whose expression is induced in response to a wide variety of physiological and environmental insults, including anticancer chemotherapy, thus allowing the cell to survive to lethal conditions. Hsp70 cytoprotective properties may be explained by its anti-apoptotic function. Indeed, this protein can inhibit key effectors of the apoptotic machinery at the pre- and postmitochondrial level. In cancer cells, the expression of Hsp70 is abnormally high, and Hsp70 may participate in oncogenesis and in resistance to chemotherapy. In rodent models, Hsp70 overexpression increases tumor growth and metastatic potential. Depletion or inhibition of Hsp70 frequently reduces the size of the tumors and even can cause their complete involution. But Hsp70 can also be found in the extracellular medium. Its role is then immunogenic and the term chaperokine to define the extracellular chaperones has been advanced. Hsp70 tumorigenic functions as well as the strategies that are being developed in cancer therapy in order to inhibit Hsp70 are commented in this chapter.
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14
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Yang X, Zheng J, Bai Y, Tian F, Yuan J, Sun J, Liang H, Guo L, Tan H, Chen W, Tanguay RM, Wu T. Using lymphocyte and plasma Hsp70 as biomarkers for assessing coke oven exposure among steel workers. ENVIRONMENTAL HEALTH PERSPECTIVES 2007; 115:1573-7. [PMID: 18007987 PMCID: PMC2072854 DOI: 10.1289/ehp.10104] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2007] [Accepted: 08/24/2007] [Indexed: 05/14/2023]
Abstract
BACKGROUND Hsp70, an early-response protein induced when organisms are confronted with simple or complicated environmental stresses, can act as either a cellular protector or a danger signal. OBJECTIVES The goal of this study was to evaluate levels of lymphocyte and/or plasma Hsp70 as biomarkers for assessing exposure response to complex coke oven emissions (COEs). METHODS We recruited 101 coke oven workers and determined levels of polycyclic aromatic hydrocarbon (PAH) exposure, urinary 1-hydroxypyrene (1-OHP), genotoxic damage by comet assay and micronuclei test, and other markers of damage, including plasma malondialdehyde (MDA) and lactate dehydrogenase (LDH). These were compared to levels of lymphocyte (intra-cellular) and plasma (extracellular) Hsp70 using Western blots and enzyme-linked immunosorbent assays (ELISA), respectively. RESULTS We observed a COEs-related dose-dependent increase in levels of DNA damage, micronuclei rate, MDA concentration, and LDH activity. Lymphocyte Hsp70 levels increased in the intermediate-exposure group (1.39 +/- 0.88) but decreased in the high-exposure group (1.10 +/- 0.55), compared with the low-exposure group. In contrast, plasma Hsp70 levels progressively increased as the dose of exposure increased. Negative correlations were seen between lymphocyte Hsp70 levels and olive tail moment and LDH activity in the intermediate- and high-exposure groups. However, we observed positive correlations between plasma Hsp70 levels and LDH activity in the low and intermediate groups. CONCLUSIONS In workers exposed to COEs, high lymphocyte Hsp70 levels may provide protection and high plasma Hsp70 levels may serve as a danger marker. Larger validation studies are needed to establish the utility of Hsp70 as a response marker.
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Affiliation(s)
- Xiaobo Yang
- Department of Environmental and Occupational Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinping Zheng
- Department of Environmental and Occupational Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Toxicology, Shanxi Medical University, Taiyuan, China
| | - Yun Bai
- Department of Environmental and Occupational Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fengjie Tian
- Department of Toxicology, Shanxi Medical University, Taiyuan, China
| | - Jing Yuan
- Department of Environmental and Occupational Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianya Sun
- Center for Disease Control and Prevention, Taiyuan Steel and Iron Limited Co., Taiyuan, China
| | - Huashan Liang
- Center for Disease Control and Prevention, Taiyuan Steel and Iron Limited Co., Taiyuan, China
| | - Liang Guo
- Center for Disease Control and Prevention, Taiyuan Steel and Iron Limited Co., Taiyuan, China
| | - Hao Tan
- Department of Environmental and Occupational Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Weihong Chen
- Department of Environmental and Occupational Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Robert M. Tanguay
- Laboratory of Cellular and Developmental Genetics, Department of Medicine, Faculty of Medicine, and CREFSIP (Centre de Recherche sur la Fonction, la Structure et l'Ingénierie des Protéines), Université Laval, Québec, Canada
| | - Tangchun Wu
- Department of Environmental and Occupational Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Address correspondence to T. Wu, Department of Environmental and Occupational Health, 2nd Building, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Rd., Wuhan, Hubei 430030, P. R. China. Telephone: 86 27 83692347. Fax: 86 27 83692560. E-mail:
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