1
|
Multi-Omics Analysis of Lung Tissue Demonstrates Changes to Lipid Metabolism during Allergic Sensitization in Mice. Metabolites 2023; 13:metabo13030406. [PMID: 36984845 PMCID: PMC10054742 DOI: 10.3390/metabo13030406] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/24/2023] [Accepted: 03/02/2023] [Indexed: 03/12/2023] Open
Abstract
Allergy and asthma pathogenesis are associated with the dysregulation of metabolic pathways. To understand the effects of allergen sensitization on metabolic pathways, we conducted a multi-omics study using BALB/cJ mice sensitized to house dust mite (HDM) extract or saline. Lung tissue was used to perform untargeted metabolomics and transcriptomics while both lung tissue and plasma were used for targeted lipidomics. Following statistical comparisons, an integrated pathway analysis was conducted. Histopathological changes demonstrated an allergic response in HDM-sensitized mice. Untargeted metabolomics showed 391 lung tissue compounds were significantly different between HDM and control mice (adjusted p < 0.05); with most compounds mapping to glycerophospholipid and sphingolipid pathways. Several lung oxylipins, including 14-HDHA, 8-HETE, 15-HETE, 6-keto-PGF1α, and PGE2 were significantly elevated in HDM-sensitized mice (p < 0.05). Global gene expression analysis showed upregulated calcium channel, G protein–signaling, and mTORC1 signaling pathways. Genes related to oxylipin metabolism such as Cox, Cyp450s, and cPla2 trended upwards. Joint analysis of metabolomics and transcriptomics supported a role for glycerophospholipid and sphingolipid metabolism following HDM sensitization. Collectively, our multi-omics results linked decreased glycerophospholipid and sphingolipid compounds and increased oxylipins with allergic sensitization; concurrent upregulation of associated gene pathways supports a role for bioactive lipids in the pathogenesis of allergy and asthma.
Collapse
|
2
|
Two-stage 3-methylcholanthrene and butylated hydroxytoluene-induced lung carcinogenesis in mice. Methods Cell Biol 2020; 163:153-173. [PMID: 33785163 DOI: 10.1016/bs.mcb.2020.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Lung cancer is one of the deadliest types of cancer and as such requires disease models that are useful for identification of novel pathways for biomarkers as well as to test therapeutic agents. Adenocarcinoma (ADC), the most prevalent type of lung cancer, is a subtype of non-small cell lung carcinoma (NSCLC) and a disease driven mainly by smoking. However, it is also the most common subtype of lung cancer found in non-smokers with environmental exposures. Chemically driven models of lung cancer, also called primary models of lung cancer, are important because they do not overexpress or delete oncogenes or tumor suppressor genes, respectively, to increase oncogenesis. Instead these models test tumor development without forcing a specific pathway (i.e., Kras). The primary focus of this chapter is to discuss a well-established 2-stage mouse model of lung adenocarcinomas. The initiator (3-methylcholanthrene, MCA) does not elicit many, if any, tumors if not followed by exposure to the tumor promoter (butylated hydroxytoluene, BHT). In sensitive strains, such as A/J, FVB, and BALB, significantly greater numbers of tumors develop following the MCA/BHT protocol compared to MCA alone. BHT does not elicit tumors on its own; it is a non-genotoxic carcinogen and promoter. In these sensitive strains, promotion is also associated with inflammation characterized by infiltrating macrophages, lymphocytes, and neutrophils, and other inflammatory cell types in addition to increases in total protein content reflective of lung hyperpermeability. This 2-stage model is a useful tool to identify unique promotion specific events to then test in future intervention studies.
Collapse
|
3
|
Wang C, Zhang N, Gao L. Association between Chlamydia pneumoniae infection and lung cancer: a meta-analysis. Transl Cancer Res 2019; 8:2813-2819. [PMID: 35117038 PMCID: PMC8797589 DOI: 10.21037/tcr.2019.10.35] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/10/2019] [Indexed: 12/24/2022]
Abstract
Background The aim of this study is to explore the correlation between Chlamydia pneumoniae (C. pneumoniae) infection and lung carcinoma. Methods Databases of PubMed, Embase, Embase, Ovid, Wanfang and China National Knowledge Infrastructure (CNKI) database were investigated for eligible literatures from their establishments to February, 2019. Included studies were selected according to specific eligibility criteria. Statistical analysis was performed by RevMan 5.3 software. Results Thirteen studies with 2,553 lung carcinoma cases and 2,460 controls were eligible for meta-analysis. The pooled results indicated that the C. pneumoniae infection IgA significantly increased the risk of lung carcinoma (OR =3.19; 95% CI, 1.96-5.19; P<0.00001) by random effect model. And for serum IgG, the pooled OR was 2.02 (95% CI, 1.29-3.16; P<0.00001) by using the random effects model. The results indicated that the IgA positive rate was significantly higher in lung cancer patients than healthy controls. Conclusions This meta-analysis revealed that C. pneumoniae infection may be a potential risk factor for lung carcinoma. However, due to its significant heterogeneity in the included studies, the consequence should be understood with caution.
Collapse
Affiliation(s)
- Chunxi Wang
- Department of Respiration, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, Tianjin Institute of Hepatobiliary Disease, The Third Central Hospital of Tianjin, Tianjin 300170, China
| | - Naxin Zhang
- Department of Respiration, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, Tianjin Institute of Hepatobiliary Disease, The Third Central Hospital of Tianjin, Tianjin 300170, China
| | - Liang Gao
- Department of Respiration, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, Tianjin Institute of Hepatobiliary Disease, The Third Central Hospital of Tianjin, Tianjin 300170, China
| |
Collapse
|
4
|
Bauer AK, Umer M, Richardson VL, Cumpian AM, Harder AQ, Khosravi N, Azzegagh Z, Hara NM, Ehre C, Mohebnasab M, Caetano MS, Merrick DT, van Bokhoven A, Wistuba II, Kadara H, Dickey BF, Velmurugan K, Mann PR, Lu X, Barón AE, Evans CM, Moghaddam SJ. Requirement for MUC5AC in KRAS-dependent lung carcinogenesis. JCI Insight 2018; 3:120941. [PMID: 30089720 PMCID: PMC6129115 DOI: 10.1172/jci.insight.120941] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 06/29/2018] [Indexed: 12/25/2022] Open
Abstract
With more than 150,000 deaths per year in the US alone, lung cancer has the highest number of deaths for any cancer. These poor outcomes reflect a lack of treatment for the most common form of lung cancer, non-small cell lung carcinoma (NSCLC). Lung adenocarcinoma (ADC) is the most prevalent subtype of NSCLC, with the main oncogenic drivers being KRAS and epidermal growth factor receptor (EGFR). Whereas EGFR blockade has led to some success in lung ADC, effective KRAS inhibition is lacking. KRAS-mutant ADCs are characterized by high levels of gel-forming mucin expression, with the highest mucin levels corresponding to worse prognoses. Despite these well-recognized associations, little is known about roles for individual gel-forming mucins in ADC development causatively. We hypothesized that MUC5AC/Muc5ac, a mucin gene known to be commonly expressed in NSCLC, is crucial in KRAS/Kras-driven lung ADC. We found that MUC5AC was a significant determinant of poor prognosis, especially in patients with KRAS-mutant tumors. In addition, by using mice with lung ADC induced chemically with urethane or transgenically by mutant-Kras expression, we observed significantly reduced tumor development in animals lacking Muc5ac compared with controls. Collectively, these results provide strong support for MUC5AC as a potential therapeutic target for lung ADC, a disease with few effective treatments.
Collapse
Affiliation(s)
- Alison K. Bauer
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Misha Umer
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Vanessa L. Richardson
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado, Aurora, Colorado, USA
| | - Amber M. Cumpian
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Anna Q. Harder
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado, Aurora, Colorado, USA
| | - Nasim Khosravi
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Zoulikha Azzegagh
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Naoko M. Hara
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado, Aurora, Colorado, USA
| | - Camille Ehre
- Marsico Lung Institute/CF Center, Department of Pediatrics, University of North Carolina – Chapel Hill, Chapel Hill, North Carolina, USA
| | - Maedeh Mohebnasab
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Mauricio S. Caetano
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Daniel T. Merrick
- Department of Pathology, University of Colorado, Aurora, Colorado, USA
| | | | - Ignacio I. Wistuba
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Humam Kadara
- Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Burton F. Dickey
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Kalpana Velmurugan
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Patrick R. Mann
- Department of Pathology, University of Colorado, Aurora, Colorado, USA
| | - Xian Lu
- Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Anna E. Barón
- Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Christopher M. Evans
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado, Aurora, Colorado, USA
| | - Seyed Javad Moghaddam
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
- The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, Texas, USA
| |
Collapse
|
5
|
Bauer AK, Upham BL, Rondini EA, Tennis MA, Velmuragan K, Wiese D. Toll-like receptor expression in human non-small cell lung carcinoma: potential prognostic indicators of disease. Oncotarget 2017; 8:91860-91875. [PMID: 29190881 PMCID: PMC5696147 DOI: 10.18632/oncotarget.19463] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 06/02/2017] [Indexed: 12/13/2022] Open
Abstract
Introduction Lung cancer remains the highest cause of cancer mortality worldwide. Toll-like receptors (TLR) are innate immune receptors that have both pro- and anti-tumorigenic properties. Based on findings from epidemiological studies and in rodents, we hypothesized that elevated TLR expression would be a positive prognostic indicator of disease in non-small cell lung carcinoma patients. Results Higher mRNA expression of TLR1-3 and 5-8 were significantly associated with increased overall survival (OS) when analyzed individually or as a group in both non-small cell lung carcinoma (NSCLC) patients and in the adenocarcinoma (ADC) subtype. Significant co-expression of many TLR combinations in ADC patients were also observed via RNA sequencing. Immunostaining demonstrated TLR4 and 8 significantly correlated in tumor tissue, similar to RNA. Methods We used kmplot.com to perform a meta-analysis on mRNA expression of TLR1-10 to determine any significant associations with OS in NSCLC and the ADC subtype. cBioportal was also used simultaneously to assess co-expression in TLR1-10 in ADC patients via RNA sequencing and to identify any molecular alterations. Lastly, immunostaining for a subset of TLRs was conducted on ADC patients. Conclusions Expression of innate immune receptors TLR1-10 is associated with improved survival outcomes in NSCLC. Thus, further evaluation of their predictive capacity and therapeutic utility is warranted.
Collapse
Affiliation(s)
- Alison K Bauer
- Department of Environmental and Occupational Health, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Brad L Upham
- Department of Pediatrics and Human Development, Michigan State University, East Lansing, MI 48824, USA
| | - Elizabeth A Rondini
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI 48824, USA
| | - Meredith A Tennis
- Department of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Kalpana Velmuragan
- Department of Environmental and Occupational Health, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - David Wiese
- McLaren Regional Medical Center, Flint, MI, 48532, USA
| |
Collapse
|
6
|
Osgood RS, Upham BL, Bushel PR, Velmurugan K, Xiong KN, Bauer AK. Secondhand Smoke-Prevalent Polycyclic Aromatic Hydrocarbon Binary Mixture-Induced Specific Mitogenic and Pro-inflammatory Cell Signaling Events in Lung Epithelial Cells. Toxicol Sci 2017; 157:156-171. [PMID: 28329830 PMCID: PMC5808746 DOI: 10.1093/toxsci/kfx027] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Low molecular weight polycyclic aromatic hydrocarbons (LMW PAHs; < 206.3 g/mol) are prevalent and ubiquitous environmental contaminants, presenting a human health concern, and have not been as thoroughly studied as the high MW PAHs. LMW PAHs exert their pulmonary effects, in part, through P38-dependent and -independent mechanisms involving cell-cell communication and the production of pro-inflammatory mediators known to contribute to lung disease. Specifically, we determined the effects of two representative LMW PAHs, 1-methylanthracene (1-MeA) and fluoranthene (Flthn), individually and as a binary PAH mixture on the dysregulation of gap junctional intercellular communication (GJIC) and connexin 43 (Cx43), activation of mitogen activated protein kinases (MAPK), and induction of inflammatory mediators in a mouse non-tumorigenic alveolar type II cell line (C10). Both 1-MeA, Flthn, and the binary PAH mixture of 1-MeA and Flthn dysregulated GJIC in a dose and time-dependent manner, reduced Cx43 protein, and activated the following MAPKs: P38, ERK1/2, and JNK. Inhibition of P38 MAPK prevented PAH-induced dysregulation of GJIC, whereas inhibiting ERK and JNK did not prevent these PAHs from dysregulating GJIC indicating a P38-dependent mechanism. A toxicogenomic approach revealed significant P38-dependent and -independent pathways involved in inflammation, steroid synthesis, metabolism, and oxidative responses. Genes in these pathways were significantly altered by the binary PAH mixture when compared with 1-MeA and Flthn alone suggesting interactive effects. Exposure to the binary PAH mixture induced the production and release of cytokines and metalloproteinases from the C10 cells. Our findings with a binary mixture of PAHs suggest that combinations of LMW PAHs may elicit synergistic or additive inflammatory responses which warrant further investigation and confirmation.
Collapse
Affiliation(s)
- Ross S. Osgood
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045
| | - Brad L. Upham
- Department of Pediatrics and Human Development, Michigan State University, East Lansing, Michigan 48824
| | - Pierre R. Bushel
- Biostatistics & Computational Biology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709
| | - Kalpana Velmurugan
- Department of Environmental and Occupational Health, University of Colorado Anschutz Medical Center, Aurora, Colorado 80045
| | - Ka-Na Xiong
- Department of Environmental and Occupational Health, University of Colorado Anschutz Medical Center, Aurora, Colorado 80045
| | - Alison K. Bauer
- Department of Environmental and Occupational Health, University of Colorado Anschutz Medical Center, Aurora, Colorado 80045
| |
Collapse
|
7
|
Alexander CM, Xiong KN, Velmurugan K, Xiong J, Osgood RS, Bauer AK. Differential innate immune cell signatures and effects regulated by toll-like receptor 4 during murine lung tumor promotion. Exp Lung Res 2016; 42:154-73. [PMID: 27093379 PMCID: PMC5506691 DOI: 10.3109/01902148.2016.1164263] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Tumor promotion is an early and critical stage during lung adenocarcinoma (ADC). We previously demonstrated that Tlr4 mutant mice were more susceptible to butylated hydroxytoluene (BHT)-induced pulmonary inflammation and tumor promotion in comparison to Tlr4-sufficient mice. Our study objective was to elucidate the underlying differences in Tlr4 mutant mice in innate immune cell populations, their functional responses, and the influence of these cellular differences on ADC progenitor (type II) cells following BHT-treatment. BALB (Tlr4-sufficient) and C.C3-Tlr4(Lps-d)/J (BALB(Lpsd); Tlr4 mutant) mice were treated with BHT (promoter) followed by bronchoalveolar lavage (BAL) and flow cytometry processing on the lungs. ELISAs, Club cell enrichment, macrophage function, and RNA isolation were also performed. Bone marrow-derived macrophages (BMDM) co-cultured with a type II cell line were used for wound healing assays. Innate immune cells significantly increased in whole lung in BHT-treated BALB(Lpsd) mice compared to BALB mice. BHT-treated BALB(Lpsd) mice demonstrated enhanced macrophage functionality, increased epithelial wound closure via BMDMs, and increased Club cell number in BALB(Lpsd) mice, all compared to BALB BHT-treated mice. Cytokine/chemokine (Kc, Mcp1) and growth factor (Igf1) levels also significantly differed among the strains and within macrophages, gene expression, and cell surface markers collectively demonstrated a more plastic phenotype in BALB(Lpsd) mice. Therefore, these correlative studies suggest that distinct innate immune cell populations are associated with the differences observed in the Tlr4-mutant model. Future studies will investigate the macrophage origins and the utility of the pathways identified herein as indicators of immune system deficiencies and lung tumorigenesis.
Collapse
Affiliation(s)
- Carla-Maria Alexander
- a Department of Environmental and Occupational Health , Colorado School of Public Health , University of Colorado at Denver-Anschutz Medical Campus , Aurora , Colorado , USA
| | - Ka-Na Xiong
- a Department of Environmental and Occupational Health , Colorado School of Public Health , University of Colorado at Denver-Anschutz Medical Campus , Aurora , Colorado , USA
| | - Kalpana Velmurugan
- a Department of Environmental and Occupational Health , Colorado School of Public Health , University of Colorado at Denver-Anschutz Medical Campus , Aurora , Colorado , USA
| | - Julie Xiong
- a Department of Environmental and Occupational Health , Colorado School of Public Health , University of Colorado at Denver-Anschutz Medical Campus , Aurora , Colorado , USA
| | - Ross S Osgood
- b Department of Pharmaceutical Sciences , School of Pharmacy , University of Colorado Denver , Aurora , Colorado , USA
| | - Alison K Bauer
- a Department of Environmental and Occupational Health , Colorado School of Public Health , University of Colorado at Denver-Anschutz Medical Campus , Aurora , Colorado , USA
| |
Collapse
|
8
|
Bauer AK, Velmurugan K, Xiong KN, Alexander CM, Xiong J, Brooks R. Epiregulin is required for lung tumor promotion in a murine two-stage carcinogenesis model. Mol Carcinog 2016; 56:94-105. [PMID: 26894620 DOI: 10.1002/mc.22475] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/27/2016] [Accepted: 02/06/2016] [Indexed: 01/08/2023]
Abstract
Adenocarcinoma accounts for ∼40% of lung cancer, equating to ∼88 500 new patients in 2015, most of who will succumb to this disease, thus, the public health burden is evident. Unfortunately, few early biomarkers as well as effective therapies exist, hence the need for novel targets in lung cancer treatment. We previously identified epiregulin (Ereg), an EGF-like ligand, as a biomarker in several mouse lung cancer models. In the present investigation we used a primary two-stage initiation/promotion model to test our hypothesis that Ereg deficiency would reduce lung tumor promotion in mice. We used 3-methylcholanthrene (initiator) or oil vehicle followed by multiple weekly exposures to butylated hydroxytoluene (BHT; promoter) in mice lacking Ereg (Ereg-/- ) and wildtype controls (BALB/ByJ; Ereg+/+ ) and examined multiple time points and endpoints (bronchoalveolar lavage analysis, tumor analysis, mRNA expression, ELISA, wound assay) during tumor promotion. At the early time points (4 and 12 wk), we observed significantly reduced amounts of inflammation (macrophages, PMNs) in the Ereg-/- mice compared to controls (Ereg+/+ ). At 20 wk, tumor multiplicity was also significantly decreased in the Ereg-/- mice versus controls (Ereg+/+ ). IL10 expression, an anti-inflammatory mediator, and downstream signaling events (Stat3) were significantly increased in the Ereg-/- mice in response to BHT, supporting both reduced inflammation and tumorigenesis. Lastly, wound healing was significantly increased with recombinant Ereg in both human and mouse lung epithelial cell lines. These results indicate that Ereg has proliferative potential and may be utilized as an early cancer biomarker as well as a novel potential therapeutic target. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Alison K Bauer
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado
| | - Kalpana Velmurugan
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado
| | - Ka-Na Xiong
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado
| | - Carla-Maria Alexander
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado
| | - Julie Xiong
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado
| | - Rana Brooks
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado
| |
Collapse
|
9
|
Łagiedo M, Sikora J, Kaczmarek M. Damage-Associated Molecular Patterns in the Course of Lung Cancer - A Review. Scand J Immunol 2015; 82:95-101. [DOI: 10.1111/sji.12308] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 05/05/2015] [Indexed: 11/28/2022]
Affiliation(s)
- M. Łagiedo
- Department of Immunology; Chair of Clinical Immunology; University of Medical Sciences; Poznań Poland
| | - J. Sikora
- Department of Immunology; Chair of Clinical Immunology; University of Medical Sciences; Poznań Poland
| | - M. Kaczmarek
- Department of Immunology; Chair of Clinical Immunology; University of Medical Sciences; Poznań Poland
| |
Collapse
|
10
|
Zhong S, Yin H, Liao Y, Yao F, Li Q, Zhang J, Jiao H, Zhao Y, Xu D, Liu S, Song H, Gao Y, Liu J, Ma L, Pang Z, Yang R, Ding C, Sun B, Lin X, Ye X, Guo W, Han B, Zhou BP, Chin YE, Deng J. Lung Tumor Suppressor GPRC5A Binds EGFR and Restrains Its Effector Signaling. Cancer Res 2015; 75:1801-14. [PMID: 25744720 DOI: 10.1158/0008-5472.can-14-2005] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 01/11/2015] [Indexed: 11/16/2022]
Abstract
GPRC5A is a G-protein-coupled receptor expressed in lung tissue but repressed in most human lung cancers. Studies in Gprc5a(-/-) mice have established its role as a tumor-suppressor function in this setting, but the basis for its role has been obscure. Here, we report that GPRC5A functions as a negative modulator of EGFR signaling. Mouse tracheal epithelial cells (MTEC) from Gprc5a(-/-) mice exhibited a relative increase in EGFR and downstream STAT3 signaling, whereas GPRC5A expression inhibited EGFR and STAT3 signaling. GPRC5A physically interacted with EGFR through its transmembrane domain, which was required for its EGFR inhibitory activity. Gprc5a(-/-) MTEC were much more susceptible to EGFR inhibitors than wild-type MTEC, suggesting their dependence on EGFR signaling for proliferation and survival. Dysregulated EGFR and STAT3 were identified in the normal epithelia of small and terminal bronchioles as well as tumors of Gprc5a(-/-) mouse lungs. Moreover, in these lungs EGFR inhibitor treatment inhibited EGFR and STAT3 activation along with cell proliferation. Finally, overexpression of ectopic GPRC5A in human non-small cell lung carcinoma cells inhibited both EGF-induced and constitutively activated EGFR signaling. Taken together, our results show how GPRC5A deficiency leads to dysregulated EGFR and STAT3 signaling and lung tumorigenesis. Cancer Res; 75(9); 1801-14. ©2015 AACR.
Collapse
Affiliation(s)
- Shuangshuang Zhong
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Huijing Yin
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yueling Liao
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Feng Yao
- Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Qi Li
- Department of Oncology, Shanghai First People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jie Zhang
- Translation Medicine Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Huike Jiao
- Insitute of Health Science, Shanghai Institute of Biological Science, Chinese Academy of Science, Shanghai, China
| | - Yongxu Zhao
- Insitute of Health Science, Shanghai Institute of Biological Science, Chinese Academy of Science, Shanghai, China
| | - Dongliang Xu
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuli Liu
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hongyong Song
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yong Gao
- Department of Oncology, Shanghai East Hospital, Tongji University, Shanghai, China
| | - Jingyi Liu
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Lina Ma
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhi Pang
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ruixu Yang
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chengyi Ding
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Beibei Sun
- Translation Medicine Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaofeng Lin
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaofeng Ye
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenzheng Guo
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Baohui Han
- Translation Medicine Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Binhua P Zhou
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky College of Medicine, Lexington, Kentucky.
| | - Y Eugene Chin
- Translation Medicine Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China. Insitute of Health Science, Shanghai Institute of Biological Science, Chinese Academy of Science, Shanghai, China.
| | - Jiong Deng
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Translation Medicine Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China.
| |
Collapse
|
11
|
Li D, Jin Y, Sun Y, Lei J, Liu C. Knockdown of toll-like receptor 4 inhibits human NSCLC cancer cell growth and inflammatory cytokine secretion in vitro and in vivo. Int J Oncol 2014; 45:813-21. [PMID: 24889928 DOI: 10.3892/ijo.2014.2479] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 05/14/2014] [Indexed: 11/06/2022] Open
Abstract
Toll-like receptor 4 (TLR4)-mediated signaling has been implicated in tumor cell invasion, survival and metastasis in several types of cancers. However, the expression of TLR4 in patients with non-small cell lung cancer (NSCLC) and its biological function in the development and progression of NSCLC have not been elucidated to date. Here, we sought to characterize the expression of TLR4 in patients with NSCLC and to investigate the biological roles of TLR4 in lung metastasis, cell invasion and survival. In this study, we found that TLR4 expression was elevated in most patients with NSCLC, and its expression levels correlated with key pathological characteristics, including tumor differentiation, stage and metastasis. Our data also showed that downregulation of TLR4 expression using an RNA silencing approach in A549 tumor cells significantly suppressed cell proliferation, cell migration and cell invasion, and induced tumor apoptosis in vitro, and suppressed tumor growth in vivo. In addition, we also found that downregulation of TLR4 expression significantly decreased cell TNF-α and IL-6 levels. Furthermore, we found that knockdown of TLR4 was able to significantly suppress constitutive phosphorylation of Akt and PI3K, which may contribute to the inhibition of tumor growth. These data suggest that TLR4 plays an important role in tumorigenic properties of human NSCLC, and that RNA interference-directed targeting of TLR4 could be used as a potential anticancer therapeutic target in NSCLC.
Collapse
Affiliation(s)
- Dan Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Jilin University, Changchun, Jilin, P.R. China
| | - Yingli Jin
- Department of Pharmacology, College of Basic Medical Science, Jilin University, Changchun, Jilin, P.R. China
| | - Ying Sun
- Department of Respiratory Medicine, The First Affiliated Hospital of Jilin University, Changchun, Jilin, P.R. China
| | - Jing Lei
- Department of Respiratory Medicine, The First Affiliated Hospital of Jilin University, Changchun, Jilin, P.R. China
| | - Chaoying Liu
- Department of Respiratory Medicine, The First Affiliated Hospital of Jilin University, Changchun, Jilin, P.R. China
| |
Collapse
|
12
|
Yang LS, Wu WS, Zhang F, Jiang Y, Fan Y, Fang HX, Long J. Role of toll-like receptors in lung cancer. J Recept Signal Transduct Res 2014; 34:342-4. [PMID: 24641697 DOI: 10.3109/10799893.2014.903418] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Lung cancer is a leading cause of death world-wide and the long-term survival rate for patients with lung cancer is one of the lowest for any cancer. Toll-like receptors (TLRs), evolutionarily conserved innate, are expressed in a wide variety of tissues and cell types, and they play key role in the innate immune system. TLRs have been found to be expressed by some kinds of tumor cells. However, what is the biological function of TLRs on tumor cells and whether human lung cancer cells can express TLRs remain to be fully understood. This review was performed to sum up the role of TLRs in lung cancer.
Collapse
Affiliation(s)
- Liu-Shan Yang
- Department of Cardio-Thoracic Surgery, The Affiliated Ruikang Hospital of Guangxi University of traditional Chinese Medicine , NanNing , China
| | | | | | | | | | | | | |
Collapse
|
13
|
Mai CW, Kang YB, Pichika MR. Should a Toll-like receptor 4 (TLR-4) agonist or antagonist be designed to treat cancer? TLR-4: its expression and effects in the ten most common cancers. Onco Targets Ther 2013; 6:1573-87. [PMID: 24235843 PMCID: PMC3821792 DOI: 10.2147/ott.s50838] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Toll-like receptor 4 (TLR-4) is well known for its host innate immunity. Despite the fact that TLR-4 activation confers antitumor responses; emerging evidence suggests that TLR-4 is associated with tumor development and progression. It is now clear that overactivation of TLR-4, through various immune mediators, may cause immune response dysfunction, resulting in tumorigenesis. Different cancers could have different extents of TLR-4 involvement during tumorigenesis or tumor progression. In this review, we focus on infection- and inflammation-related TLR-4 activation in noncancer and cancer cells, as well as on the current evidence about the role of TLR-4 in ten of the most common cancers, viz, head and neck cancer, lung cancer, gastrointestinal cancer, liver cancer, pancreatic cancer, skin cancer, breast cancer, ovarian cancer, cervical cancer, and prostate cancer.
Collapse
Affiliation(s)
- Chun Wai Mai
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
| | - Yew Beng Kang
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
| | - Mallikarjuna Rao Pichika
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
- Correspondence: Mallikarjuna Rao Pichika, Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Kuala Lumpur, Malaysia, Tel +60 32 731 7208, Fax +60 38 656 7229, Email
| |
Collapse
|
14
|
Deng X, Nanduri B, Tan W, Cheng B, Fan R, Pruett SB. Sodium methyldithiocarbamate exerts broad inhibition of cellular signaling and expression of effector molecules of inflammation. Toxicol Sci 2013; 136:430-42. [PMID: 24056979 DOI: 10.1093/toxsci/kft196] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Sodium methyldithiocarbamate (SMD) is one of the most abundantly used conventional pesticides in the United States. At dosages relevant to occupational exposure, it causes major effects on the immune system in mice, including a decreased resistance to sepsis. This lab has identified some of the mechanisms of action of this compound and some of the immunological parameters affected, but the global effects have not previously been assessed. The purpose of the present study was to conduct transcriptomic analysis of the effects of SMD on lipopolysaccharide-induced expression of mediators important in innate immunity and inflammation. The results revealed broad effects on expression of transcription factors in both branches of Toll-like receptor 4 (TLR4) signaling (MyD88 and TRIF). However, TLR3 and interferon signaling pathways were decreased to a greater extent, and assessment of the effects of SMD on polyinosinic polycytidylic acid-induced cytokine and chemokine production revealed that these responses mediated by TLR3 were indeed sensitive to the effects of SMD, with inhibition occurring at lower dosages than required to inhibit responses to other immunological stimuli tested in our previous studies. In the downstream signaling pathways of these TLRs, functional analysis also revealed that NF-κB activation was inhibited by SMD, as indicated by gene expression analysis and a reporter construct in mice. A previously unreported effect on luteinizing hormone and follicle-stimulating hormone pathways was also observed.
Collapse
Affiliation(s)
- Xiaomin Deng
- * Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762
| | | | | | | | | | | |
Collapse
|
15
|
Friedenson B. Mutations in components of antiviral or microbial defense as a basis for breast cancer. Funct Integr Genomics 2013; 13:411-24. [PMID: 24057274 DOI: 10.1007/s10142-013-0336-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/04/2013] [Accepted: 09/10/2013] [Indexed: 12/19/2022]
Abstract
In-depth functional analyses of thousands of breast cancer gene mutations reveals vastly different sets of mutated genes in each of 21 different breast cancer genomes. Despite differences in which genes are mutated, innate immunity pathways and metabolic reactions supporting them are always damaged. These functions depend on many different genes. Mutations may be rare individually but each set of mutations affects some aspect of pathogen recognition and defense, especially those involving viruses. Some mutations cause a dysregulated immune response, which can also increase cancer risks. The frequency of an individual mutation may be less important than its effect on function. This work demonstrates that acquired immune deficiencies and immune dysregulation in cancer can occur because of mutations. Abnormal immune responses represent a hidden variable in breast cancer-viral association studies. Compensating for these abnormalities may open many new opportunities for cancer prevention and therapy.
Collapse
Affiliation(s)
- Bernard Friedenson
- Department of Biochemistry and Molecular Genetics, College of Medicine, University of Illinois Chicago, Chicago, USA,
| |
Collapse
|
16
|
Mori T, Okamoto K, Tanaka Y, Teye K, Umata T, Ohneda K, Tokuyama K, Okabe M, Tsuneoka M. Ablation of Mina53 in mice reduces allergic response in the airways. Cell Struct Funct 2013; 38:155-67. [PMID: 23748603 DOI: 10.1247/csf.13006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The mina53 (myc-induced nuclear antigen with a 53 kDa molecular mass; also known as mina) was identified as a direct transcriptional target of the oncoprotein Myc and encodes a conserved protein in vertebrates. While Mina53 is known to be associated with tumorigenesis, it is not clear what role Mina53 plays in non-neoplastic tissues. To directly address the roles of Mina53 in non-neoplastic tissues, we created mina53-deficient mice. Both male and female mina53-deficient mice reached adulthood and were fertile, suggesting that Mina53 is dispensable for the basic developmental processes. Since we found that Mina53 was expressed in cells responsible for immune responses, we investigated whether Mina53 was involved in immune responses. When mice were exposed intranasally to house dust mites as an allergen, the airway tract showed hyperresponsiveness to methacholine in wild-type mice but not in mina53-deficient mice. The mina53-deficient mice also showed a significantly reduced migration of immune cells, including eosinophils, into bronchoalveolar lavage fluid compared with wild-type mice. The levels of Th2 cytokines, IL-4 and IL-5, produced in response to house dust mites were lower in the mina53-deficient mice than in wild-type mice. The level of IFN-γ in bronchoalveolar lavage fluid was significantly decreased by exposure to house dust mites in wild-type mice but not in the mina53-deficient mice. These results suggest that Mina53 plays a role in the allergic response to inhaled allergens, possibly through controlling IL-4 production.
Collapse
Affiliation(s)
- Tetsuya Mori
- Laboratory of Allergy and Immunology, Faculty of Pharmacy, Takasaki University of Health and Welfare, Takasaki, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Polycyclic aromatic hydrocarbon-induced signaling events relevant to inflammation and tumorigenesis in lung cells are dependent on molecular structure. PLoS One 2013; 8:e65150. [PMID: 23755184 PMCID: PMC3670909 DOI: 10.1371/journal.pone.0065150] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 04/23/2013] [Indexed: 12/12/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental and occupational toxicants, which are a major human health concern in the U.S. and abroad. Previous research has focused on the genotoxic events caused by high molecular weight PAHs, but not on non-genotoxic events elicited by low molecular weight PAHs. We used an isomeric pair of low molecular weight PAHs, namely 1-Methylanthracene (1-MeA) and 2-Methylanthracene (2-MeA), in which only 1-MeA possessed a bay-like region, and hypothesized that 1-MeA, but not 2-MeA, would affect non-genotoxic endpoints relevant to tumor promotion in murine C10 lung cells, a non-tumorigenic type II alveolar pneumocyte and progenitor cell type of lung adenocarcinoma. The non-genotoxic endpoints assessed were dysregulation of gap junction intercellular communication function and changes in the major pulmonary connexin protein, connexin 43, using fluorescent redistribution and immunoblots, activation of mitogen activated protein kinases (MAPK) using phosphospecific MAPK antibodies for immunoblots, and induction of inflammatory genes using quantitative RT-PCR. 2-MeA had no effect on any of the endpoints, but 1-MeA dysregulated gap junctional communication in a dose and time dependent manner, reduced connexin 43 protein expression, and altered membrane localization. 1-MeA also activated ERK1/2 and p38 MAP kinases. Inflammatory genes, such as cyclooxygenase 2, and chemokine ligand 2 (macrophage chemoattractant 2), were also upregulated in response to 1-MeA only. These results indicate a possible structure-activity relationship of these low molecular weight PAHs relevant to non-genotoxic endpoints of the promoting aspects of cancer. Therefore, our novel findings may improve the ability to predict outcomes for future studies with additional toxicants and mixtures, identify novel targets for biomarkers and chemotherapeutics, and have possible implications for future risk assessment for these PAHs.
Collapse
|
18
|
Exacerbated airway toxicity of environmental oxidant ozone in mice deficient in Nrf2. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:254069. [PMID: 23766849 PMCID: PMC3665255 DOI: 10.1155/2013/254069] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 03/29/2013] [Indexed: 12/20/2022]
Abstract
Ozone (O3) is a strong oxidant in air pollution that has harmful effects on airways and exacerbates respiratory disorders. The transcription factor Nrf2 protects airways from oxidative stress through antioxidant response element-bearing defense gene induction. The present study was designed to determine the role of Nrf2 in airway toxicity caused by inhaled O3 in mice. For this purpose, Nrf2-deficient (Nrf2(-/-)) and wild-type (Nrf2(+/+)) mice received acute and subacute exposures to O3. Lung injury was determined by bronchoalveolar lavage and histopathologic analyses. Oxidation markers and mucus hypersecretion were determined by ELISA, and Nrf2 and its downstream effectors were determined by RT-PCR and/or Western blotting. Acute and sub-acute O3 exposures heightened pulmonary inflammation, edema, and cell death more severely in Nrf2(-/-) mice than in Nrf2(+/+) mice. O3 caused bronchiolar and terminal bronchiolar proliferation in both genotypes of mice, while the intensity of compensatory epithelial proliferation, bronchial mucous cell hyperplasia, and mucus hypersecretion was greater in Nrf2(-/-) mice than in Nrf2(+/+) mice. Relative to Nrf2(+/+), O3 augmented lung protein and lipid oxidation more highly in Nrf2(-/-) mice. Results suggest that Nrf2 deficiency exacerbates oxidative stress and airway injury caused by the environmental pollutant O3.
Collapse
|
19
|
Hill T, Osgood RS, Velmurugan K, Alexander CM, Upham BL, Bauer AK. Bronchoalveolar Lavage Fluid Utilized Ex Vivo to Validate In Vivo Findings: Inhibition of Gap Junction Activity in Lung Tumor Promotion is Toll-Like Receptor 4-Dependent. ACTA ACUST UNITED AC 2013; 5. [PMID: 25035812 PMCID: PMC4098145 DOI: 10.4172/2155-9929.1000160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
TLR4 protects against lung tumor promotion and pulmonary inflammation in mice. Connexin 43 (Cx43), a gap junction gene, was increased in Tlr4 wildtype compared to Tlr4-mutant mice in response to promotion, which suggests gap junctional intercellular communication (GJIC) may be compromised. We hypothesized that the early tumor microenvironment, represented by Bronchoalveolar Lavage Fluid (BALF) from Butylated hydroxytoluene (BHT; promoter)-treated mice, would produce TLR4-dependent changes in pulmonary epithelium, including dysregulation of GJIC in the Tlr4-mutant (BALBLps-d) compared to the Tlr4-sufficient (BALB; wildtype) mice. BHT (4 weekly doses) was injected ip followed by BALF collection at 24 h. BALF total protein and total macrophages were significantly elevated in BHT-treated BALBLps-d over BALB mice, similar to previous findings. BALF was then utilized in an ex vivo manner to treat C10 cells, a murine alveolar type II cell line, followed by the scrape-load dye transfer assay (GJIC), Cx43 immunostaining, and quantitative RT-PCR (Mcp-1, monocyte chemotactic protein 1). GJIC was markedly reduced in C10 cells treated with BHT-treated BALBLps-d BALF for 4 and 24 h compared to BALB and control BALF from the respective mice (p < 0.05). Mcp-1, a chemokine, was also significantly increased in the BHT-treated BALBLps-d BALF compared to the BALB mice, and Cx43 protein expression in the cell membrane altered. These novel findings suggest signaling from the BALF milieu is involved in GJIC dysregulation associated with promotion and links gap junctions to pulmonary TLR4 protection in a novel ex vivo model that could assist in future potential tumor promoter screening.
Collapse
Affiliation(s)
- Thomas Hill
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Ross S Osgood
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Kalpana Velmurugan
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Carla-Maria Alexander
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Brad L Upham
- Department of Pediatrics and Human Development, Michigan State University, Lansing, USA
| | - Alison K Bauer
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado, USA
| |
Collapse
|
20
|
Cho HY, van Houten B, Wang X, Miller-DeGraff L, Fostel J, Gladwell W, Perrow L, Panduri V, Kobzik L, Yamamoto M, Bell DA, Kleeberger SR. Targeted deletion of nrf2 impairs lung development and oxidant injury in neonatal mice. Antioxid Redox Signal 2012; 17:1066-82. [PMID: 22400915 PMCID: PMC3423869 DOI: 10.1089/ars.2011.4288] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
AIMS Nrf2 is an essential transcription factor for protection against oxidant disorders. However, its role in organ development and neonatal disease has received little attention. Therapeutically administered oxygen has been considered to contribute to bronchopulmonary dysplasia (BPD) in prematurity. The current study was performed to determine Nrf2-mediated molecular events during saccular-to-alveolar lung maturation, and the role of Nrf2 in the pathogenesis of hyperoxic lung injury using newborn Nrf2-deficient (Nrf2(-/-)) and wild-type (Nrf2(+/+)) mice. RESULTS Pulmonary basal expression of cell cycle, redox balance, and lipid/carbohydrate metabolism genes was lower while lymphocyte immunity genes were more highly expressed in Nrf2(-/-) neonates than in Nrf2(+/+) neonates. Hyperoxia-induced phenotypes, including mortality, arrest of saccular-to-alveolar transition, and lung edema, and inflammation accompanying DNA damage and tissue oxidation were significantly more severe in Nrf2(-/-) neonates than in Nrf2(+/+) neonates. During lung injury pathogenesis, Nrf2 orchestrated expression of lung genes involved in organ injury and morphology, cellular growth/proliferation, vasculature development, immune response, and cell-cell interaction. Bioinformatic identification of Nrf2 binding motifs and augmented hyperoxia-induced inflammation in genetically deficient neonates supported Gpx2 and Marco as Nrf2 effectors. INNOVATION This investigation used lung transcriptomics and gene targeted mice to identify novel molecular events during saccular-to-alveolar stage transition and to elucidate Nrf2 downstream mechanisms in protection from hyperoxia-induced injury in neonate mouse lungs. CONCLUSION Nrf2 deficiency augmented lung injury and arrest of alveolarization caused by hyperoxia during the newborn period. Results suggest a therapeutic potential of specific Nrf2 activators for oxidative stress-associated neonatal disorders including BPD.
Collapse
Affiliation(s)
- Hye-Youn Cho
- Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Anti-inflammatory changes of gene expression by Artemisia iwayomogi in the LPS-stimulated human gingival fibroblast: Microarray analysis. Arch Pharm Res 2012; 35:549-63. [DOI: 10.1007/s12272-012-0319-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 08/23/2011] [Accepted: 08/24/2011] [Indexed: 11/27/2022]
|
22
|
Targeted deletion of Nrf2 reduces urethane-induced lung tumor development in mice. PLoS One 2011; 6:e26590. [PMID: 22039513 PMCID: PMC3198791 DOI: 10.1371/journal.pone.0026590] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Accepted: 09/29/2011] [Indexed: 12/22/2022] Open
Abstract
Nrf2 is a key transcription factor that regulates cellular redox and defense responses. However, permanent Nrf2 activation in human lung carcinomas promotes pulmonary malignancy and chemoresistance. We tested the hypothesis that Nrf2 has cell survival properties and lack of Nrf2 suppresses chemically-induced pulmonary neoplasia by treating Nrf2+/+ and Nrf2-/- mice with urethane. Airway inflammation and injury were assessed by bronchoalveolar lavage analyses and histopathology, and lung tumors were analyzed by gross and histologic analysis. We used transcriptomics to assess Nrf2-dependent changes in pulmonary gene transcripts at multiple stages of neoplasia. Lung hyperpermeability, cell death and apoptosis, and inflammatory cell infiltration were significantly higher in Nrf2-/- mice compared to Nrf2+/+ mice 9 and 11 wk after urethane. Significantly fewer lung adenomas were found in Nrf2-/- mice than in Nrf2+/+ mice at 12 and 22 wk. Nrf2 modulated expression of genes involved cell-cell signaling, glutathione metabolism and oxidative stress response, and immune responses during early stage neoplasia. In lung tumors, Nrf2-altered genes had roles in transcriptional regulation of cell cycle and proliferation, carcinogenesis, organismal injury and abnormalities, xenobiotic metabolism, and cell-cell signaling genes. Collectively, Nrf2 deficiency decreased susceptibility to urethane-induced lung tumorigenesis in mice. Cell survival properties of Nrf2 were supported, at least in part, by reduced early death of initiated cells and heightened advantage for tumor cell expansion in Nrf2+/+ mice relative to Nrf2-/- mice. Our results were consistent with the concept that Nrf2 over-activation is an adaptive response of cancer conferring resistance to anti-cancer drugs and promoting malignancy.
Collapse
|
23
|
Rohrbeck A, Salinas G, Maaser K, Linge J, Salovaara S, Corvi R, Borlak J. Toxicogenomics Applied to In Vitro Carcinogenicity Testing with Balb/c 3T3 Cells Revealed a Gene Signature Predictive of Chemical Carcinogens. Toxicol Sci 2010; 118:31-41. [DOI: 10.1093/toxsci/kfq246] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
|