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Zhao M, Liu Y, Gao Y, Wang X, Zhou H, Zhang A. Insights into the functional role of grass carp IL-8 in head kidney leukocytes: pro-inflammatory effects and signalling mechanisms. JOURNAL OF FISH BIOLOGY 2022; 100:192-202. [PMID: 34716580 DOI: 10.1111/jfb.14934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/23/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
Interleukin-8 (IL-8) is a critical chemokine regulating immune cells' chemotaxis as well as their physiological or pathological activations. In fish cells, recombinant IL-8 proteins induced transcriptions of pro-inflammatory cytokines. Nonetheless, the exact mechanisms underlying the function of fish IL-8 as a pro-inflammatory cytokine are still unclear. In this paper, the authors first prepared recombinant grass carp IL-8 (rgcIL-8) using an Escherichia coli expression system, and later confirmed rgcIL-8 increased gene expression of il8, il1β and tumour necrosis factor alpha (tnfα) in grass carp head kidney leukocytes (HKLs). Using signalling pathway inhibitors, the authors showed that rgcIL-8 regulated transcriptions of pro-inflammatory cytokines via MAPK and/or NF-κB signalling pathways. They cloned gcIL-8-specific receptor CXCR1 and subsequently discovered that gcIL-8 could increase the activity of NF-κB and the transcription of IL-1β via CXCR1. Simultaneously, antibody neutralization assay showed that endogenous IL-8 is partially relevant to the self-regulation of IL-1β. Moreover, rgcIL-8 led to the expression of inducible nitric oxide synthase gene, causing an accumulation of nitric oxide in the culture medium of HKLs, suggesting the potential of gcIL-8 to mediate inflammatory response. This study not only enriched the function of IL-8 in teleost but also revealed it as a potential target for the inflammatory control in grass carp.
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Affiliation(s)
- Minghui Zhao
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Yazhen Liu
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Yajun Gao
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Xinyan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Hong Zhou
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Anying Zhang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
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2
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Interleukin-8 Dedifferentiates Primary Human Luminal Cells to Multipotent Stem Cells. Mol Cell Biol 2020; 40:MCB.00508-19. [PMID: 32015100 DOI: 10.1128/mcb.00508-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 01/02/2020] [Indexed: 11/20/2022] Open
Abstract
During aging, cellular plasticity and senescence play important roles in tissue regeneration and the pathogenesis of different diseases, including cancer. We have recently shown that senescent breast luminal cells can activate their adjacent stromal fibroblasts. In the present report, we present clear evidence that these senescence-related active fibroblasts can dedifferentiate proliferating primary human luminal cells to multipotent stem cells in an interleukin-8 (IL-8)-dependent manner. This was confirmed using recombinant IL-8, while the truncated protein was not active. This IL-8-related dedifferentiation of luminal cells was mediated through the STAT3-dependent downregulation of p16INK4A and the microRNA miR-141. Importantly, these in vitro-generated mammary stem cells exhibited high molecular and cellular similarities to human mammary stem cells. They have also shown a long-term mammary gland-reconstituting ability and the capacity to produce milk postdelivery. Thereby, these IL-8-generated mammary stem cells could be of great value for autologous cell therapy procedures and also for biomedical research as well as drug development.
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3
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Senescent Breast Luminal Cells Promote Carcinogenesis through Interleukin-8-Dependent Activation of Stromal Fibroblasts. Mol Cell Biol 2019; 39:MCB.00359-18. [PMID: 30397077 DOI: 10.1128/mcb.00359-18] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 10/21/2018] [Indexed: 01/06/2023] Open
Abstract
Aging and stress promote senescence, which has intrinsic tumor suppressor functions and extrinsic tumor promoting properties. Therefore, it is of utmost importance to delineate the effects of senescence inducers on the various types of cells that compose the different organs. We show here that primary normal breast luminal (NBL) cells are more sensitive than their corresponding stromal fibroblasts to proliferative as well as oxidative damage-induced senescence. Like fibroblasts, senescent NBL cells secreted elevated amounts of various cytokines, including interleukin-6 (IL-6) and IL-8, and expressed high levels of p16, p21, and p53, while lamin B1 was downregulated. When senescent, luminal cells activated stromal fibroblasts in an IL-8-dependent manner, through the activation of the STAT3 pathway. These myofibroblasts promoted the epithelial-to-mesenchymal transition and the stemness processes in breast cancer cells in a paracrine manner both in vitro and in a breast cancer animal model. These results show the role of senescent breast luminal cells in promoting the inflammatory/carcinogenic microenvironment through the activation of fibroblasts in an IL-8-dependent manner.
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4
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Cheng J, Li Y, Liu S, Jiang Y, Ma J, Wan L, Li Q, Pang T. CXCL8 derived from mesenchymal stromal cells supports survival and proliferation of acute myeloid leukemia cells through the PI3K/AKT pathway. FASEB J 2018; 33:4755-4764. [DOI: 10.1096/fj.201801931r] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jingying Cheng
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
| | - Ying Li
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
| | - Shiqi Liu
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
| | - Yajing Jiang
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
| | - Jiao Ma
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
| | - Li Wan
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
| | - Qinghua Li
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
| | - Tianxiang Pang
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical College Tianjin China
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Yu C, Liu Y, Qin Z. Metadherin contributes to epithelial-mesenchymal transition and paclitaxel resistance induced by acidic extracellular pH in nasopharyngeal carcinoma. Oncol Lett 2018; 15:3858-3863. [PMID: 29456735 DOI: 10.3892/ol.2018.7760] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Accepted: 11/16/2017] [Indexed: 12/14/2022] Open
Abstract
Paclitaxel resistance is a challenge to the treatment of nasopharyngeal carcinoma (NPC). An acidic extracellular pH (pHe), a hallmark of solid tumors, is demonstrated to decrease the efficacy of chemotherapy. However, the precise function of acidic pHe in mediating chemotherapy in NPC remains unknown. In the present study, acidic pHe significantly decreased the cytotoxicity of paclitaxel in NPC cells. In addition, epithelial-mesenchymal transition (EMT)-like changes were observed in NPC cells cultured at acidic pHe. Metadherin (MTDH), a novel oncogene, is expressed in multiple types of solid tumor, and is associated with several malignant cell characteristics, including malignant cell transformation, proliferation, angiogenesis, chemoresistance, invasion and metastasis. In the present study, MTDH expression was increased in NPC cells that had been cultured at an acidic pHe. Furthermore, the silencing of MTDH expression reversed EMT molecular marker expression and sensitized NPC cells to paclitaxel. Taken together, the results of the present study provide evidence to support an association between acidic pHe-induced paclitaxel resistance and MTDH-mediated EMT in NPC cells. Thus, targeting MTDH may provide a novel strategy for overcoming chemoresistance in NPC therapy.
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Affiliation(s)
- Changyun Yu
- Department of Otolaryngology Head and Neck Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450000, P.R. China
| | - Yong Liu
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Zhaobing Qin
- Department of Otolaryngology Head and Neck Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450000, P.R. China
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6
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Boccellino M, Quagliuolo L, Alaia C, Grimaldi A, Addeo R, Nicoletti GF, Kast RE, Caraglia M. The strange connection between epidermal growth factor receptor tyrosine kinase inhibitors and dapsone: from rash mitigation to the increase in anti-tumor activity. Curr Med Res Opin 2016; 32:1839-1848. [PMID: 27398628 DOI: 10.1080/03007995.2016.1211522] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The presence of an aberrantly activated epidermal growth factor receptor (EGFR) in many epithelial tumors, due to its overexpression, activating mutations, gene amplification and/or overexpression of receptor ligands, represent the fundamental basis underlying the use of EGFR tyrosine kinase inhibitors (EGFR-TKIs). Drugs inhibiting the EGFR have different mechanisms of action; while erlotinib and gefitinib inhibit the intracellular tyrosine kinase, monoclonal antibodies like cetuximab and panitumumab bind the extracellular domain of the EGFR both activating immunomediated anti-cancer effect and inhibiting receptor function. On the other hand, interleukin-8 has tumor promoting as well as neo-angiogenesis enhancing effects and several attempts have been made to inhibit its activity. One of these is based on the use of the old sulfone antibiotic dapsone that has demonstrated several interleukin-8 system inhibiting actions. Erlotinib typically gives a rash that has recently been proven to come out via up-regulated keratinocyte interleukin-8 synthesis with histological features reminiscent of typical neutrophilic dermatoses. In this review, we report experimental evidence that shows the use of dapsone to improve quality of life in erlotinib-treated patients by ameliorating rash as well as short-circuiting a growth-enhancing aspect of erlotinib based on increased interleukin-8 secretion.
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Affiliation(s)
- Mariarosaria Boccellino
- a Department of Biochemistry, Biophysics and General Pathology , Second University of Naples , Naples , Italy
| | - Lucio Quagliuolo
- a Department of Biochemistry, Biophysics and General Pathology , Second University of Naples , Naples , Italy
| | - Concetta Alaia
- a Department of Biochemistry, Biophysics and General Pathology , Second University of Naples , Naples , Italy
| | - Anna Grimaldi
- a Department of Biochemistry, Biophysics and General Pathology , Second University of Naples , Naples , Italy
| | - Raffaele Addeo
- b Oncology DH ASL Napoli 3 Nord, Frattamaggiore Hospital , Frattamaggiore , Naples , Italy
| | | | | | - Michele Caraglia
- a Department of Biochemistry, Biophysics and General Pathology , Second University of Naples , Naples , Italy
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7
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IL-8 as mediator in the microenvironment-leukaemia network in acute myeloid leukaemia. Sci Rep 2015; 5:18411. [PMID: 26674118 PMCID: PMC4682064 DOI: 10.1038/srep18411] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 11/17/2015] [Indexed: 12/17/2022] Open
Abstract
The bone marrow microenvironment is physiologically hypoxic with areas being as low as 1% O2, e.g. the stem cell niche. Acute myeloid leukaemia (AML) blasts misuse these bone marrow niches for protection by the local microenvironment, but also might create their own microenvironment. Here we identify IL-8 as a hypoxia-regulated cytokine in both AML cell lines and primary AML samples that is induced within 48 hours of severe hypoxia (1% O2). IL-8 lacked effects on AML cells but induced migration in mesenchymal stromal cells (MSC), an integral part of the bone marrow. Accordingly, MSC were significantly increased in AML bone marrow as compared to healthy bone marrow. Interestingly, mononuclear cells obtained from healthy bone marrow displayed both significantly lower endogenous and hypoxia-induced production of IL-8. IL-8 mRNA expression in AML blasts from 533 patients differed between genetic subgroups with significantly lower expression of IL-8 in acute promyelocytic leukaemia (APL), while in non APL-AML patients with FLT ITD had the highest IL-8 expression. In this subgroup, high IL-8 expression was also prognostically unfavourable. In conclusion, hypoxia as encountered in the bone marrow specifically increases IL-8 expression of AML, which in turn impacts niche formation. High IL-8 expression might be correlated with poor prognosis in certain AML subsets.
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8
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Kast RE. Erlotinib augmentation with dapsone for rash mitigation and increased anti-cancer effectiveness. SPRINGERPLUS 2015; 4:638. [PMID: 26543772 PMCID: PMC4628020 DOI: 10.1186/s40064-015-1441-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 10/14/2015] [Indexed: 01/10/2023]
Abstract
BACKGROUND The epidermal growth factor receptor tyrosine kinase inhibitor erlotinib has failed in many ways to be as potent in the anti-cancer role as pre-clinical studies would have suggested. This paper traces some aspects of this failure to a compensatory erlotinib-mediated increase in interleukin-8. Many other-but not all- cancer chemotherapeutic cytotoxic drugs also provoke a compensatory increase in a malignant clone's interleukin-8 synthesis. Untreated glioblastoma and other cancer cells themselves natively synthesize interleukin-8. Interleukin-8 has tumor growth promoting, mobility and metastasis formation enhancing, effects as well as pro-angiogenesis effects. FINDINGS The old sulfone antibiotic dapsone- one of the very first antibiotics in clinical use- has demonstrated several interleukin-8 system inhibiting actions. Review of these indicates dapsone has potential to augment erlotinib effectiveness. Erlotinib typically gives a rash that has recently been proven to come about via an erlotinib triggered up-regulated keratinocyte interleukin-8 synthesis. The erlotinib rash shares histological features reminiscent of typical neutrophilic dermatoses. Dapsone has an established therapeutic role in current treatment of other neutrophilic dermatoses. CONCLUSION Thus, dapsone has potential to both improve the quality of life in erlotinib treated patients by amelioration of rash as well as to short-circuit a growth-enhancing aspect of erlotinib when used in the anti-cancer role.
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Affiliation(s)
- R E Kast
- IIAIGC Study Center, 22 Church Street, Burlington, VT 05401 USA
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9
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Visciano C, Liotti F, Prevete N, Cali' G, Franco R, Collina F, de Paulis A, Marone G, Santoro M, Melillo RM. Mast cells induce epithelial-to-mesenchymal transition and stem cell features in human thyroid cancer cells through an IL-8-Akt-Slug pathway. Oncogene 2015; 34:5175-86. [PMID: 25619830 DOI: 10.1038/onc.2014.441] [Citation(s) in RCA: 165] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 11/21/2014] [Accepted: 12/16/2014] [Indexed: 12/18/2022]
Abstract
There is increasing evidence that mast cells (MCs) and their mediators are involved in the remodeling of the tumor microenvironment and promote tumor growth, angiogenesis and metastasis. We have found that an increased density of MCs in thyroid cancer (TC) correlates with enhanced invasiveness. However, the MC-derived factors responsible for this activity and the mechanisms by which they enhance TC invasiveness remain unidentified. Here, we report that MCs, when activated by TC cells, produce soluble factors that induce epithelial-to-mesenchymal transition (EMT) and stemness features of TC cells. We identified CXCL8/interleukin (IL)-8 as the main mediator contained in activated MC conditioned media (CM) capable of inducing both EMT and stemness of TC cells. Mechanistically, MC CM or exogenous IL-8 stimulated Akt phosphorylation and Slug expression in TC cells. The inhibition of the Akt pathway or depletion of the Slug transcription factor by RNA interference, reverted EMT and stemness responses. TC cells stably transfected with exogenous IL-8 underwent EMT, displayed increased stemness and enhanced tumorigenicity with respect to control cells. The analysis of TC surgical specimens by immunohistochemical analysis demonstrated a positive correlation between MC density (Tryptase(+) cells) and stemness features (OCT4 staining). Taken together, our data identify an MC-dependent IL-8-Akt-Slug pathway that sustains EMT/stemness of TC cells. The blockade of this circuit might be exploited for the therapy of advanced TC.
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Affiliation(s)
- C Visciano
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche/Istituto di Endocrinologia ed Oncologia Sperimentale del CNR 'G. Salvatore', University of Naples Federico II, Naples, Italy
| | - F Liotti
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche/Istituto di Endocrinologia ed Oncologia Sperimentale del CNR 'G. Salvatore', University of Naples Federico II, Naples, Italy
| | - N Prevete
- Dipartimento di Scienze Mediche Traslazionali/Centro Interdipartimentale di Ricerca in Scienze Immunologiche di Base e Cliniche, University of Naples Federico II, Naples, Italy
| | - G Cali'
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche/Istituto di Endocrinologia ed Oncologia Sperimentale del CNR 'G. Salvatore', University of Naples Federico II, Naples, Italy
| | - R Franco
- Struttura Complessa di Anatomia Patologica, Istituto Nazionale Tumori, Fondazione G. Pascale, Naples, Italy
| | - F Collina
- Struttura Complessa di Anatomia Patologica, Istituto Nazionale Tumori, Fondazione G. Pascale, Naples, Italy
| | - A de Paulis
- Dipartimento di Scienze Mediche Traslazionali/Centro Interdipartimentale di Ricerca in Scienze Immunologiche di Base e Cliniche, University of Naples Federico II, Naples, Italy
| | - G Marone
- Dipartimento di Scienze Mediche Traslazionali/Centro Interdipartimentale di Ricerca in Scienze Immunologiche di Base e Cliniche, University of Naples Federico II, Naples, Italy
| | - M Santoro
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche/Istituto di Endocrinologia ed Oncologia Sperimentale del CNR 'G. Salvatore', University of Naples Federico II, Naples, Italy
| | - R M Melillo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche/Istituto di Endocrinologia ed Oncologia Sperimentale del CNR 'G. Salvatore', University of Naples Federico II, Naples, Italy
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10
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Stockmann C, Schadendorf D, Klose R, Helfrich I. The impact of the immune system on tumor: angiogenesis and vascular remodeling. Front Oncol 2014; 4:69. [PMID: 24782982 PMCID: PMC3986554 DOI: 10.3389/fonc.2014.00069] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 03/20/2014] [Indexed: 12/20/2022] Open
Abstract
Angiogenesis, the formation of new blood vessels, as well as inflammation with massive infiltration of leukocytes are hallmarks of various tumor entities. Various epidemiological, clinical, and experimental studies have not only demonstrated a link between chronic inflammation and cancer onset but also shown that immune cells from the bone marrow such as tumor-infiltrating macrophages significantly influence tumor progression. Tumor angiogenesis is critical for tumor development as tumors have to establish a blood supply in order to progress. Although tumor cells were first believed to fuel tumor angiogenesis, numerous studies have shown that the tumor microenvironment and infiltrating immune cell subsets are important for regulating the process of tumor angiogenesis. These infiltrates involve the adaptive immune system including several types of lymphocytes as well as cells of the innate immunity such as macrophages, neutrophils, eosinophils, mast cells, dendritic cells, and natural killer cells. Besides their known immune function, these cells are now recognized for their crucial role in regulating the formation and the remodeling of blood vessels in the tumor. In this review, we will discuss for each cell type the mechanisms that regulate the vascular phenotype and its impact on tumor growth and metastasis.
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Affiliation(s)
- Christian Stockmann
- UMR 970, Paris Cardiovascular Research Center, Institut National de la Santé et de la Recherche Médicale (INSERM) , Paris , France
| | - Dirk Schadendorf
- Skin Cancer Unit, Dermatology Department, Medical Faculty, University Duisburg-Essen , Essen , Germany
| | - Ralph Klose
- UMR 970, Paris Cardiovascular Research Center, Institut National de la Santé et de la Recherche Médicale (INSERM) , Paris , France
| | - Iris Helfrich
- Skin Cancer Unit, Dermatology Department, Medical Faculty, University Duisburg-Essen , Essen , Germany
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11
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Yunusova T, Akhtar M, Poltoratsky V. Analysis of LPS-induced, NFκB-dependent interleukin-8 transcription in kidney embryonic cell line expressing TLR4 using luciferase assay. Methods Mol Biol 2014; 1172:305-14. [PMID: 24908317 DOI: 10.1007/978-1-4939-0928-5_28] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Gene expression is orchestrated by a complex network of signal transduction pathways that typically originate on cell surface receptors and culminate in DNA-binding transcription factors, which translocate to the nucleus and bind cis-regulatory elements in promoter regions of genes, thereby inducing de novo synthesis of the nascent RNA transcripts and their splicing. Gene expression arrays monitor abundance of the matured, spliced cDNA, which undergoes additional posttranscriptional modifications that greatly affect the half-life of the cDNA. Thus, the relative abundance of cDNA is not necessarily commensurable with the activity of promoters of the corresponding genes. In contrast, reporter gene assays provide valuable insight into the regulation of gene expression at the level of transcription and allow for discerning the contribution of individual transcription factors into changes in gene expression. Here, we describe a robust reporter gene assay method that is useful for exploration of transcription regulatory network, which regulates gene expression in response to inflammation. The method is exemplified by using the promoter region of the prototypic pro-inflammatory chemokine interleukin-8 (IL-8, CXCL8), which plays an important role in immune response as well as carcinogenesis. Using the luciferase reporter gene assay, we analyze the activation status of the IL-8 promoter in lipopolysaccharide (LPS)-stimulated human embryonic kidney cells.
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Affiliation(s)
- Tamara Yunusova
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, 8000 Utopia Parkway, Queens, NY, 11439, USA
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12
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Patel NR, Pattni BS, Abouzeid AH, Torchilin VP. Nanopreparations to overcome multidrug resistance in cancer. Adv Drug Deliv Rev 2013; 65:1748-62. [PMID: 23973912 DOI: 10.1016/j.addr.2013.08.004] [Citation(s) in RCA: 247] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 08/02/2013] [Indexed: 01/08/2023]
Abstract
Multidrug resistance is the most widely exploited phenomenon by which cancer eludes chemotherapy. Broad variety of factors, ranging from the cellular ones, such as over-expression of efflux transporters, defective apoptotic machineries, and altered molecular targets, to the physiological factors such as higher interstitial fluid pressure, low extracellular pH, and formation of irregular tumor vasculature are responsible for multidrug resistance. A combination of various undesirable factors associated with biological surroundings together with poor solubility and instability of many potential therapeutic small & large molecules within the biological systems and systemic toxicity of chemotherapeutic agents has necessitated the need for nano-preparations to optimize drug delivery. The physiology of solid tumors presents numerous challenges for successful therapy. However, it also offers unique opportunities for the use of nanotechnology. Nanoparticles, up to 400 nm in size, have shown great promise for carrying, protecting and delivering potential therapeutic molecules with diverse physiological properties. In this review, various factors responsible for the MDR and the use of nanotechnology to overcome the MDR, the use of spheroid culture as well as the current technique of producing microtumor tissues in vitro are discussed in detail.
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13
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Kato Y, Ozawa S, Miyamoto C, Maehata Y, Suzuki A, Maeda T, Baba Y. Acidic extracellular microenvironment and cancer. Cancer Cell Int 2013; 13:89. [PMID: 24004445 PMCID: PMC3849184 DOI: 10.1186/1475-2867-13-89] [Citation(s) in RCA: 864] [Impact Index Per Article: 78.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 08/29/2013] [Indexed: 12/18/2022] Open
Abstract
Acidic extracellular pH is a major feature of tumor tissue, extracellular acidification being primarily considered to be due to lactate secretion from anaerobic glycolysis. Clinicopathological evidence shows that transporters and pumps contribute to H+ secretion, such as the Na+/H+ exchanger, the H+-lactate co-transporter, monocarboxylate transporters, and the proton pump (H+-ATPase); these may also be associated with tumor metastasis. An acidic extracellular pH not only activates secreted lysosomal enzymes that have an optimal pH in the acidic range, but induces the expression of certain genes of pro-metastatic factors through an intracellular signaling cascade that is different from hypoxia. In addition to lactate, CO2 from the pentose phosphate pathway is an alternative source of acidity, showing that hypoxia and extracellular acidity are, while being independent from each other, deeply associated with the cellular microenvironment. In this article, the importance of an acidic extracellular pH as a microenvironmental factor participating in tumor progression is reviewed.
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Affiliation(s)
- Yasumasa Kato
- Department of Oral Function and Molecular Biology, Ohu University School of Dentistry, 963-8611, Koriyama, Japan.
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14
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Rationale and Means to Target Pro-Inflammatory Interleukin-8 (CXCL8) Signaling in Cancer. Pharmaceuticals (Basel) 2013; 6:929-59. [PMID: 24276377 PMCID: PMC3817732 DOI: 10.3390/ph6080929] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 07/03/2013] [Accepted: 07/29/2013] [Indexed: 12/13/2022] Open
Abstract
It is well established that chronic inflammation underpins the development of a number of human cancers, with pro-inflammatory signaling within the tumor microenvironment contributing to tumor progression and metastasis. CXCL8 is an ELR+ pro-inflammatory CXC-chemokine which mediates its effects via signaling through two G protein-coupled receptors, CXCR1 and CXCR2. Elevated CXCL8-CXCR1/2 signaling within the tumor microenvironment of numerous cancers is known to enhance tumor progression via activation of signaling pathways promoting proliferation, angiogenesis, migration, invasion and cell survival. This review provides an overview of established roles of CXCL8-CXCR1/2 signaling in cancer and subsequently, discusses the possible strategies of targeting CXCL8-CXCR1/2 signaling in cancer, covering indirect strategies (e.g., anti-inflammatories, NFκB inhibitors) and direct CXCL8 or CXCR1/2 inhibition (e.g., neutralizing antibodies, small molecule receptor antagonists, pepducin inhibitors and siRNA strategies). Reports of pre-clinical cancer studies and clinical trials using CXCL8-CXCR1/2-targeting strategies for the treatment of inflammatory diseases will be discussed. The future translational opportunities for use of such agents in oncology will be discussed, with emphasis on exploitation in stratified populations.
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15
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Bølling AK, Totlandsdal AI, Sallsten G, Braun A, Westerholm R, Bergvall C, Boman J, Dahlman HJ, Sehlstedt M, Cassee F, Sandstrom T, Schwarze PE, Herseth JI. Wood smoke particles from different combustion phases induce similar pro-inflammatory effects in a co-culture of monocyte and pneumocyte cell lines. Part Fibre Toxicol 2012; 9:45. [PMID: 23176191 PMCID: PMC3544657 DOI: 10.1186/1743-8977-9-45] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2012] [Accepted: 11/02/2012] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Exposure to particulate matter (PM) has been linked to several adverse cardiopulmonary effects, probably via biological mechanisms involving inflammation. The pro-inflammatory potential of PM depends on the particles' physical and chemical characteristics, which again depend on the emitting source. Wood combustion is a major source of ambient air pollution in Northern countries during the winter season. The overall aim of this study was therefore to investigate cellular responses to wood smoke particles (WSPs) collected from different phases of the combustion cycle, and from combustion at different temperatures. RESULTS WSPs from different phases of the combustion cycle induced very similar effects on pro-inflammatory mediator release, cytotoxicity and cell number, whereas WSPs from medium-temperature combustion were more cytotoxic than WSPs from high-temperature incomplete combustion. Furthermore, comparisons of effects induced by native WSPs with the corresponding organic extracts and washed particles revealed that the organic fraction was the most important determinant for the WSP-induced effects. However, the responses induced by the organic fraction could generally not be linked to the content of the measured polycyclic aromatic hydrocarbons (PAHs), suggesting that also other organic compounds were involved. CONCLUSION The toxicity of WSPs seems to a large extent to be determined by stove type and combustion conditions, rather than the phase of the combustion cycle. Notably, this toxicity seems to strongly depend on the organic fraction, and it is probably associated with organic components other than the commonly measured unsubstituted PAHs.
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Affiliation(s)
| | | | - Gerd Sallsten
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, Gothenburg, Sweden
| | - Artur Braun
- Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Roger Westerholm
- Department of Analytical Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, 106 91, Sweden
| | - Christoffer Bergvall
- Department of Analytical Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, 106 91, Sweden
| | - Johan Boman
- Department of Chemistry, University of Gothenburg, Gothenburg, Sweden
| | - Hans Jørgen Dahlman
- Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo, Norway
| | - Maria Sehlstedt
- Department of Respiratory Medicine and Allergy, University of Umeå, Umeå, Sweden
| | - Flemming Cassee
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Thomas Sandstrom
- Department of Respiratory Medicine and Allergy, University of Umeå, Umeå, Sweden
| | - Per E Schwarze
- Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo, Norway
| | - Jan Inge Herseth
- Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
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Bølling AK, Totlandsdal AI, Sallsten G, Braun A, Westerholm R, Bergvall C, Boman J, Dahlman HJ, Sehlstedt M, Cassee F, Sandstrom T, Schwarze PE, Herseth JI. Wood smoke particles from different combustion phases induce similar pro-inflammatory effects in a co-culture of monocyte and pneumocyte cell lines. Part Fibre Toxicol 2012. [PMID: 23176191 DOI: 10.1186/1743-8977-9-45/figures/4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023] Open
Abstract
BACKGROUND Exposure to particulate matter (PM) has been linked to several adverse cardiopulmonary effects, probably via biological mechanisms involving inflammation. The pro-inflammatory potential of PM depends on the particles' physical and chemical characteristics, which again depend on the emitting source. Wood combustion is a major source of ambient air pollution in Northern countries during the winter season. The overall aim of this study was therefore to investigate cellular responses to wood smoke particles (WSPs) collected from different phases of the combustion cycle, and from combustion at different temperatures. RESULTS WSPs from different phases of the combustion cycle induced very similar effects on pro-inflammatory mediator release, cytotoxicity and cell number, whereas WSPs from medium-temperature combustion were more cytotoxic than WSPs from high-temperature incomplete combustion. Furthermore, comparisons of effects induced by native WSPs with the corresponding organic extracts and washed particles revealed that the organic fraction was the most important determinant for the WSP-induced effects. However, the responses induced by the organic fraction could generally not be linked to the content of the measured polycyclic aromatic hydrocarbons (PAHs), suggesting that also other organic compounds were involved. CONCLUSION The toxicity of WSPs seems to a large extent to be determined by stove type and combustion conditions, rather than the phase of the combustion cycle. Notably, this toxicity seems to strongly depend on the organic fraction, and it is probably associated with organic components other than the commonly measured unsubstituted PAHs.
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17
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Toward an integrative analysis of the tumor microenvironment in ovarian epithelial carcinoma. CANCER MICROENVIRONMENT 2011; 5:173-83. [PMID: 22109660 DOI: 10.1007/s12307-011-0092-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Accepted: 11/10/2011] [Indexed: 12/11/2022]
Abstract
Ovarian epithelial carcinomas are heterogeneous malignancies exhibiting great diversity in histological phenotypes as well as genetic and epigenetic aberrations. A general early event in tumorigenesis is regional dissemination into the peritoneal cavity. Initial spread to the peritoneum is made possible by cooperative signaling between a wide array of molecules constituting the tissue microenvironment in the coelomic epithelium. Changes in the activity of key microenvironmental components not constitutively expressed in normal tissue, including several disclosed adhesion molecules, growth factors, proteases, and G-protein coupled receptors (GPCRs), coordinate the transition. Remodeling of the extracellular matrix (ECM) and subsequent cell surface interactions enable transformation by promoting chromosomal instability (CIN) and stimulating several common signal transduction cascades to prepare the tissue for harboring and facilitating growth, angiogenesis and metastasis of the developing tumor.
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Smit N, Musson R, Romijn F, van Rossum H, van Pelt J. Effects of Ultraviolet A-1 Radiation on Calcineurin Activity and Cytokine Production in (Skin) Cell Cultures. Photochem Photobiol 2010; 86:360-6. [DOI: 10.1111/j.1751-1097.2009.00650.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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19
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Wysoczynski M, Shin DM, Kucia M, Ratajczak MZ. Selective upregulation of interleukin-8 by human rhabdomyosarcomas in response to hypoxia: therapeutic implications. Int J Cancer 2010; 126:371-81. [PMID: 19588509 PMCID: PMC4021846 DOI: 10.1002/ijc.24732] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Rhabdomyosarcoma (RMS) is the most common soft-tissue sarcoma of adolescence and childhood. Because RMS tumors are highly vascularized, we sought to determine which factors secreted by RMS cells are crucial in stimulating angiogenesis in response to hypoxia. To address this issue, we evaluated expression of several proangiogenic factors [interleukin (IL)-8, vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF)-2, stromal-derived factor (SDF)-1, hepatocyte growth factor (HGF) and leukemia inhibitory factor (LIF)] in 8 human RMS cell lines in both normal steady-state and hypoxic conditions. We found by real-time quantitative polymerase chain reaction (RQ-PCR) and confirmed by enzyme-linked immunosorbent assay (ELISA) that from all the factors evaluated, IL-8, whose expression is very low in normoxia, had been very highly expressed and secreted by RMS cells lines during hypoxic conditions ( approximately 40-170 times). Interestingly, this upregulation was not affected by knocking down hypoxia-inducible factor (HIF)-1alpha, but was inhibited by mitogen-activated protein kinase (MAPK)p42/44 and phosphatidylinositaol 3-kinase (PI3K)/AKT pathway inhibitors. This suggests that IL-8 expression is regulated in an activating protein (AP)-1- and nuclear factor (NF)-kappaB-dependent manner. Furthermore, we found that conditioned media (CM) harvested from RMS cells exposed to hypoxia activated and stimulated chemotactic responses in human umbilical vein endothelial cells (HUVECs) and that IL-8 was responsible for hypoxia-related effects. Finally, by employing shRNA, the expression of IL-8 in human RH-30 cells was downregulated. We noticed that such RMS cells, if injected into skeletal muscles of immunodeficient mice, have a reduced ability for tumor formation. We conclude that IL-8 is a pivotal proangiogenic factor released by human RMS cells in hypoxic conditions and that the targeting of IL-8 may prove to be a novel and efficient strategy for inhibiting RMS growth.
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Affiliation(s)
- Marcin Wysoczynski
- James Graham Brown Cancer Center, University of Louisville, Louisville, USA
| | - Dong-Myung Shin
- James Graham Brown Cancer Center, University of Louisville, Louisville, USA
| | - Magda Kucia
- James Graham Brown Cancer Center, University of Louisville, Louisville, USA
| | - Mariusz Z. Ratajczak
- James Graham Brown Cancer Center, University of Louisville, Louisville, USA
- Department of Physiopathology Pomeranian Medical University, Szczecina, Poland
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20
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Herseth JI, Refsnes M, Låg M, Schwarze PE. Role of IL-1β and COX2 in silica-induced IL-6 release and loss of pneumocytes in co-cultures. Toxicol In Vitro 2009; 23:1342-53. [DOI: 10.1016/j.tiv.2009.06.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Revised: 06/18/2009] [Accepted: 06/30/2009] [Indexed: 01/02/2023]
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21
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Tsai CY, Lee TS, Kou YR, Wu YL. Glucosamine inhibits IL-1β-mediated IL-8 production in prostate cancer cells by MAPK attenuation. J Cell Biochem 2009; 108:489-98. [DOI: 10.1002/jcb.22278] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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22
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Herseth JI, Volden V, Schwarze PE, Låg M, Refsnes M. IL-1beta differently involved in IL-8 and FGF-2 release in crystalline silica-treated lung cell co-cultures. Part Fibre Toxicol 2008; 5:16. [PMID: 19014534 PMCID: PMC2588635 DOI: 10.1186/1743-8977-5-16] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Accepted: 11/13/2008] [Indexed: 12/16/2022] Open
Abstract
Background Inhalation of crystalline silica particles is in humans associated with inflammation and development of fibrosis. The aim of the present study was to investigate the effect of crystalline silica on the release of the fibrosis- and angiogenesis-related mediator FGF-2 and the pro-inflammatory mediator IL-8, and how IL-1β and TNF-α were involved in this release from various mono- and co-cultures of monocytes, pneumocytes and endothelial cells. Results Silica exposure induced an increase of IL-8 release from monocytes and from pneumocytes alone, and the FGF-2 level in the medium increased upon silica exposure of pneumocytes. Both the responses were enhanced in non-contact co-cultures with endothelial cells. The FGF-2 release seemed to increase with the silica-induced decrease in the number of pneumocytes. The release of IL-8 and FGF-2 was partially suppressed in cultures with pneumocytes in contact with monocytes compared to non-contact cultures. Treatment with anti-TNF-α and the IL-1 receptor antagonist revealed that release of IL-1β, and not TNF-α, from monocytes dominated the regulation of IL-8 release in co-cultures. For release of FGF-2, IL-1ra was without effect. However, exogenous IL-1β reduced the FGF-2 levels, strongly elevated the FGF-2-binding protein PTX3, and prevented the reduction in the number of pneumocytes induced by silica. Conclusion IL-1β seems to be differently involved in the silica-induced release of IL-8 and FGF-2 in different lung cell cultures. Whereas the silica-induced IL-8 release is regulated via an IL-1-receptor-mediated mechanism, IL-1β is suggested only indirectly to affect the silica-induced FGF-2 release by counteracting pneumocyte loss. Furthermore, the enhanced IL-8 and FGF-2 responses in co-cultures involving endothelial cells show the importance of the interaction between different cell types and may suggest that both these mediators are important in angiogenic or fibrogenic processes.
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Affiliation(s)
- Jan I Herseth
- Department for Air Pollution and Noise, Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo, Norway.
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Kocbach A, Herseth JI, Låg M, Refsnes M, Schwarze PE. Particles from wood smoke and traffic induce differential pro-inflammatory response patterns in co-cultures. Toxicol Appl Pharmacol 2008; 232:317-26. [DOI: 10.1016/j.taap.2008.07.002] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2008] [Revised: 06/27/2008] [Accepted: 07/04/2008] [Indexed: 12/15/2022]
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24
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Bischoff DS, Zhu JH, Makhijani NS, Yamaguchi DT. Acidic pH stimulates the production of the angiogenic CXC chemokine, CXCL8 (interleukin-8), in human adult mesenchymal stem cells via the extracellular signal-regulated kinase, p38 mitogen-activated protein kinase, and NF-kappaB pathways. J Cell Biochem 2008; 104:1378-92. [PMID: 18275043 DOI: 10.1002/jcb.21714] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Blood vessel injury results in limited oxygen tension and diffusion leading to hypoxia, increased anaerobic metabolism, and elevated production of acidic metabolites that cannot be easily removed due to the reduced blood flow. Therefore, an acidic extracellular pH occurs in the local microenvironment of disrupted bone. The potential role of acidic pH and glu-leu-arg (ELR(+)) CXC chemokines in early events in bone repair was studied in human mesenchymal stem cells (hMSCs) treated with medium of decreasing pH (7.4, 7.0, 6.7, and 6.4). The cells showed a reciprocal increase in CXCL8 (interleukin-8, IL-8) mRNA levels as extracellular pH decreased. At pH 6.4, CXCL8 mRNA was induced >60x in comparison to levels at pH 7.4. hMSCs treated with osteogenic medium (OGM) also showed an increase in CXCL8 mRNA with decreasing pH; although, at a lower level than that seen in cells grown in non-OGM. CXCL8 protein was secreted into the medium at all pHs with maximal induction at pH 6.7. Inhibition of the G-protein-coupled receptor alpha, G(alphai), suppressed CXCL8 levels in response to acidic pH; whereas phospholipase C inhibition had no effect on CXCL8. The use of specific mitogen-activated protein kinase (MAPK) signal transduction inhibitors indicated that the pH-dependent increase in CXCL8 mRNA is due to activation of ERK and p38 pathways. The JNK pathway was not involved. NF-kappaB inhibition resulted in a decrease in CXCL8 levels in hMSCs grown in non-OGM. However, OGM-differentiated hMSCs showed an increase in CXCL8 levels when treated with the NF-kappaB inhibitor PDTC, a pyrrolidine derivative of dithiocarbamate.
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Affiliation(s)
- David S Bischoff
- Research Service, VA Greater Los Angeles Healthcare System, Los Angeles, CA 90073, USA
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Murdoch C, Muthana M, Coffelt SB, Lewis CE. The role of myeloid cells in the promotion of tumour angiogenesis. Nat Rev Cancer 2008; 8:618-31. [PMID: 18633355 DOI: 10.1038/nrc2444] [Citation(s) in RCA: 1199] [Impact Index Per Article: 74.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The use of various transgenic mouse models and analysis of human tumour biopsies has shown that bone marrow-derived myeloid cells, such as macrophages, neutrophils, eosinophils, mast cells and dendritic cells, have an important role in regulating the formation and maintenance of blood vessels in tumours. In this Review the evidence for each of these cell types driving tumour angiogenesis is outlined, along with the mechanisms regulating their recruitment and activation by the tumour microenvironment. We also discuss the therapeutic implications of recent findings that specific myeloid cell populations modulate the responses of tumours to agents such as chemotherapy and some anti-angiogenic therapies.
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Affiliation(s)
- Craig Murdoch
- Department of Oral and Maxillofacial Surgery, School of Clinical Dentistry, Beech Hill Road, University of Sheffield, Sheffield, UK
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26
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Abstract
Metastasis is a final stage of tumor progression. Breast and prostate cancer cells preferentially metastasize to bone, wherein they cause incurable osteolytic and osteoblastic lesions. The bone matrix is rich in factors, such as transforming growth factor-beta and insulin-like growth factors, which are released into the tumor microenvironment by osteolysis. These factors stimulate the growth of tumor cells and alter their phenotype, thus promoting a vicious cycle of metastasis and bone pathology. Physical factors within the bone microenvironment, including low oxygen levels, acidic pH, and high extracellular calcium concentrations, may also enhance tumor growth. These elements of the microenvironment are potential targets for chemotherapeutic intervention to halt tumor growth and suppress bone metastasis.
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Affiliation(s)
- Lauren A Kingsley
- University of Virginia Department of Medicine, Division of Endocrinology, Charlottesville, Virginia, USA
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27
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Amura CR, Brodsky KS, Gitomer B, McFann K, Lazennec G, Nichols MT, Jani A, Schrier RW, Doctor RB. CXCR2 agonists in ADPKD liver cyst fluids promote cell proliferation. Am J Physiol Cell Physiol 2008; 294:C786-96. [PMID: 18199703 DOI: 10.1152/ajpcell.00457.2007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is a highly prevalent genetic disease that results in cyst formation in kidney and liver. Cytokines and growth factors secreted by the cyst-lining epithelia are positioned to initiate autocrine/paracrine signaling and promote cyst growth. Comparative analyses of human kidney and liver cyst fluids revealed disparate cytokine/growth factor profiles. CXCR2 agonists, including IL-8, epithelial neutrophil-activating peptide (ENA-78), growth-related oncogene-alpha (GRO-alpha), are potent proliferative agents that were found at high levels in liver but not kidney cyst fluids. Liver cysts are lined by epithelial cells derived from the intrahepatic bile duct (i.e., cholangiocytes). In polarized pkd2(WS25/-) mouse liver cyst epithelial monolayers, CXCR2 agonists were released both apically and basally, indicating that they may act both on the endothelial and epithelial cells within or lining the cyst wall. IL-8 and human liver cyst fluid induced cell proliferation of HMEC-1 cells, a human microvascular endothelial cell line, and Mz-ChA1 cells, a human cholangiocyte cell model. IL-8 expression can be regulated by specific stresses. Hypoxia and mechanical stretch, two likely stressors acting on the liver cyst epithelia, significantly increased IL-8 secretion and promoter activity. AP-1, c/EBP, and NF-kappaB were required but not sufficient to drive the stress-induced increase in IL-8 transcription. An upstream element between -272 and -1,481 bp allowed for the stress-induced increase in IL-8 transcription. These studies support the hypothesis that CXCR2 signaling promotes ADPKD liver cyst growth.
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Affiliation(s)
- Claudia R Amura
- Division of Gastroenterology, Department of Medicine, University of Colorado Health Sciences Center, Box B-146, Denver, CO 80262, USA
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28
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Abstract
Inflammatory cell infiltration of tumors contributes either positively or negatively to tumor invasion, growth, metastasis, and patient outcomes, creating a Dr. Jekyll or Mr. Hyde conundrum when examining mechanisms of action. This is due to tumor heterogeneity and the diversity of the inflammatory cell phenotypes that infiltrate primary and metastatic lesions. Tumor infiltration by macrophages is generally associated with neoangiogenesis and negative outcomes, whereas dendritic cell (DC) infiltration is typically associated with a positive clinical outcome in association with their ability to present tumor antigens (Ags) and induce Ag-specific T cell responses. Myeloid-derived suppressor cells (MDSCs) also infiltrate tumors, inhibiting immune responses and facilitating tumor growth and metastasis. In contrast, T cell infiltration of tumors provides a positive prognostic surrogate, although subset analyses suggest that not all infiltrating T cells predict a positive outcome. In general, infiltration by CD8(+) T cells predicts a positive outcome, while CD4(+) cells predict a negative outcome. Therefore, the analysis of cellular phenotypes and potentially spatial distribution of infiltrating cells are critical for an accurate assessment of outcome. Similarly, cellular infiltration of metastatic foci is also a critical parameter for inducing therapeutic responses, as well as establishing tumor dormancy. Current strategies for cellular, gene, and molecular therapies are focused on the manipulation of infiltrating cellular populations. Within this review, we discuss the role of tumor infiltrating, myeloid-monocytic cells, and T lymphocytes, as well as their potential for tumor control, immunosuppression, and facilitation of metastasis.
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Affiliation(s)
- James E Talmadge
- Laboratory of Transplantation Immunology, Department of Pathology and Microbiology, University of Nebraska Medical Center, 987660 Nebraska Medical Center, Omaha, NE 68198-7660, USA.
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Laver T, Nozell SE, Benveniste EN. IFN-β-Mediated Inhibition of IL-8 Expression Requires the ISGF3 Components Stat1, Stat2, and IRF-9. J Interferon Cytokine Res 2008; 28:13-23. [DOI: 10.1089/jir.2007.0062] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Travis Laver
- Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL 35294-0005
| | - Susan E. Nozell
- Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL 35294-0005
| | - Etty N. Benveniste
- Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL 35294-0005
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30
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Han LY, Landen CN, Trevino JG, Halder J, Lin YG, Kamat AA, Kim TJ, Merritt WM, Coleman RL, Gershenson DM, Shakespeare WC, Wang Y, Sundaramoorth R, Metcalf CA, Dalgarno DC, Sawyer TK, Gallick GE, Sood AK. Antiangiogenic and antitumor effects of SRC inhibition in ovarian carcinoma. Cancer Res 2007; 66:8633-9. [PMID: 16951177 PMCID: PMC3202609 DOI: 10.1158/0008-5472.can-06-1410] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Src, a nonreceptor tyrosine kinase, is a key mediator for multiple signaling pathways that regulate critical cellular functions and is often aberrantly activated in a number of solid tumors, including ovarian carcinoma. The purpose of this study was to determine the role of activated Src inhibition on tumor growth in an orthotopic murine model of ovarian carcinoma. In vitro studies on HeyA8 and SKOV3ip1 cell lines revealed that Src inhibition by the Src-selective inhibitor, AP23846, occurred within 1 hour and responded in a dose-dependent manner. Furthermore, Src inhibition enhanced the cytotoxicity of docetaxel in both chemosensitive and chemoresistant ovarian cancer cell lines, HeyA8 and HeyA8-MDR, respectively. In vivo, Src inhibition by AP23994, an orally bioavailable analogue of AP23846, significantly decreased tumor burden in HeyA8 (P = 0.02), SKOV3ip1 (P = 0.01), as well as HeyA8-MDR (P < 0.03) relative to the untreated controls. However, the greatest effect on tumor reduction was observed in combination therapy with docetaxel (P < 0.001, P = 0.002, and P = 0.01, for the above models, respectively). Proliferating cell nuclear antigen staining showed that Src inhibition alone (P = 0.02) and in combination with docetaxel (P = 0.007) significantly reduced tumor proliferation. In addition, Src inhibition alone and in combination with docetaxel significantly down-regulated tumoral production of vascular endothelial growth factor and interleukin 8, whereas combination therapy decreased the microvessel density (P = 0.02) and significantly affected vascular permeability (P < 0.05). In summary, Src inhibition with AP23994 has potent antiangiogenic effects and significantly reduces tumor burden in preclinical ovarian cancer models. Thus, Src inhibition may be an attractive therapeutic approach for patients with ovarian carcinoma.
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Affiliation(s)
- Liz Y. Han
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Charles N. Landen
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Jose G. Trevino
- Department of Cancer Biology, University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Jyotsnabaran Halder
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Yvonne G. Lin
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Aparna A. Kamat
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Tae-Jin Kim
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
- Department of Gynecologic Oncology at Cheil General Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - William M. Merritt
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Robert L. Coleman
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - David M. Gershenson
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | | | - Yihan Wang
- ARIAD Pharmaceuticals, Cambridge, Massachusetts
| | | | | | | | | | - Gary E. Gallick
- Department of Cancer Biology, University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Anil K. Sood
- Department of Gynecologic Oncology University of Texas M.D. Anderson Cancer Center, Houston, Texas
- Department of Cancer Biology, University of Texas M.D. Anderson Cancer Center, Houston, Texas
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Rubie C, Frick VO, Pfeil S, Wagner M, Kollmar O, Kopp B, Graber S, Rau BM, Schilling MK. Correlation of IL-8 with induction, progression and metastatic potential of colorectal cancer. World J Gastroenterol 2007; 13:4996-5002. [PMID: 17854143 PMCID: PMC4434624 DOI: 10.3748/wjg.v13.i37.4996] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression profile of IL-8 in inflammatory and malignant colorectal diseases to evaluate its potential role in the regulation of colorectal cancer (CRC) and the development of colorectal liver metastases (CRLM).
METHODS: IL-8 expression was assessed by quantitative real-time PCR (Q-RT-PCR) and the enzyme-linked immunosorbent assay (ELISA) in resected specimens from patients with ulcerative colitis (UC, n = 6) colorectal adenomas (CRA, n = 8), different stages of colorectal cancer (n = 48) as well as synchronous and metachronous CRLM along with their corresponding primary colorectal tumors (n = 16).
RESULTS: IL-8 mRNA and protein expression was significantly up-regulated in all pathological colorectal entities investigated compared with the corresponding neighboring tissues. However, in the CRC specimens IL-8 revealed a significantly more pronounced overexpression in relation to the CRA and UC tissues with an average 30-fold IL-8 protein up-regulation in the CRC specimens in comparison to the CRA tissues. Moreover, IL-8 expression revealed a close correlation with tumor grading. Most interestingly, IL-8 up-regulation was most enhanced in synchronous and metachronous CRLM, if compared with the corresponding primary CRC tissues. Herein, an up to 80-fold IL-8 overexpression in individual metachronous metastases compared to normal tumor neighbor tissues was found.
CONCLUSION: Our results strongly suggest an association between IL-8 expression, induction and progression of colorectal carcinoma and the development of colorectal liver metastases.
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Affiliation(s)
- Claudia Rubie
- Labor fur Allgemein-, Viszeral-, GefaSS- und Kinderchirurgie, Universitatsklinikum des Saarlandes, Chirurgische Klinik, Gebaude 57, Homburg 66421, Germany.
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32
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Kato Y, Ozawa S, Tsukuda M, Kubota E, Miyazaki K, St-Pierre Y, Hata RI. Acidic extracellular pH increases calcium influx-triggered phospholipase D activity along with acidic sphingomyelinase activation to induce matrix metalloproteinase-9 expression in mouse metastatic melanoma. FEBS J 2007; 274:3171-83. [PMID: 17540003 DOI: 10.1111/j.1742-4658.2007.05848.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Acidic extracellular pH is a common feature of tumor tissues. We have reported that culturing cells at acidic pH (5.4-6.5) induced matrix metalloproteinase-9 expression through phospholipase D, extracellular signal regulated kinase 1/2 and p38 mitogen-activated protein kinases and nuclear factor-kappaB. Here, we show that acidic extracellular pH signaling involves both pathways of phospholipase D triggered by Ca2+ influx and acidic sphingomyelinase in mouse B16 melanoma cells. We found that BAPTA-AM [1,2-bis(2-aminophenoxy)-ethane-N,N,N',N'-tetraacetic acid tetrakis (acetoxymethyl) ester], a chelator of intracellular free calcium, and the voltage dependent Ca2+ channel blockers, mibefradil (for T-type) and nimodipine (for L-type), dose-dependently inhibited acidic extracellular pH-induced matrix metalloproteinase-9 expression. Intracellular free calcium concentration ([Ca2+]i) was transiently elevated by acidic extracellular pH, and this [Ca2+]i elevation was repressed by EGTA and the voltage dependent Ca2+ channel blockers but not by phospholipase C inhibitor, suggesting that acidic extracellular pH increased [Ca2+]i through voltage dependent Ca2+ channel. In contrast, SR33557, an L-type voltage dependent Ca2+ channel blocker and acidic sphingomyelinase inhibitor, attenuated matrix metalloproteinase-9 induction but did not affect calcium influx. We found that acidic sphingomyelinase activity was induced by acidic extracellular pH and that the specific acidic sphingomyelinase inhibitors (perhexiline and desipramine) and siRNA targeting aSMase/smpd1 could inhibit acidic extracellular pH-induced matrix metalloproteinase-9 expression. BAPTA-AM reduced acidic extracellular pH-induced phospholipase D but not acidic sphingomyelinase acitivity. The acidic sphingomyelinase inhibitors did not affect the phosphorylation of extracellular signal regulated kinase 1/2 and p38, but they suppressed nuclear factor-kappaB activity. These data suggest that the calcium influx-triggered phospholipase D and acidic sphingomyelinase pathways of acidic extracellular pH induced matrix metalloproteinase-9 expression, at least in part, through nuclear factor-kappaB activation.
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Affiliation(s)
- Yasumasa Kato
- Department of Biochemistry and Molecular Biology, Kanagawa Dental College, Yokosuka, Japan.
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Maxwell PJ, Gallagher R, Seaton A, Wilson C, Scullin P, Pettigrew J, Stratford IJ, Williams KJ, Johnston PG, Waugh DJJ. HIF-1 and NF-κB-mediated upregulation of CXCR1 and CXCR2 expression promotes cell survival in hypoxic prostate cancer cells. Oncogene 2007; 26:7333-45. [PMID: 17533374 DOI: 10.1038/sj.onc.1210536] [Citation(s) in RCA: 158] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hypoxic cancer cells are resistant to treatment, leading to the selection of cells with a more malignant phenotype. The expression of interleukin-8 (IL-8) plays an important role in the tumorigenesis and metastasis of solid tumors including prostate cancer. Recently, we detected elevated expression of IL-8 and IL-8 receptors in human prostate cancer tissue. The objective of the current study was to determine whether hypoxia increases IL-8 and IL-8 receptor expression in prostate cancer cells and whether this contributes to a survival advantage in hypoxic cells. IL-8, CXCR1 and CXCR2 messenger RNA (mRNA) expression in PC3 cells was upregulated in response to hypoxia in a time-dependent manner. Elevated IL-8 secretion following hypoxia was detected by enzyme-linked immunosorbent assay, while immunoblotting confirmed elevated receptor expression. Attenuation of hypoxia-inducible factor (HIF-1) and nuclear factor-kappaB (NF-kappaB) transcriptional activity using small interfering RNA (siRNA), a HIF-1 dominant-negative and pharmacological inhibitors, abrogated hypoxia-induced transcription of CXCR1 and CXCR2 in PC3 cells. Furthermore, chromatin-IP analysis demonstrated binding of HIF-1 and NF-kappaB to CXCR1. Finally, inhibition of IL-8 signaling potentiated etoposide-induced cell death in hypoxic PC3 cells. These results suggest that IL-8 signaling confers a survival advantage to hypoxic prostate cancer cells, and therefore, strategies to inhibit IL-8 signaling may sensitize hypoxic tumor cells to conventional treatments.
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MESH Headings
- Cell Survival
- Chromatin Immunoprecipitation
- Enzyme-Linked Immunosorbent Assay
- Flow Cytometry
- Humans
- Hypoxia
- Hypoxia-Inducible Factor 1, alpha Subunit/antagonists & inhibitors
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Immunoblotting
- Immunoprecipitation
- Interleukin-8/metabolism
- Male
- NF-kappa B/antagonists & inhibitors
- NF-kappa B/genetics
- NF-kappa B/metabolism
- Prostatic Neoplasms/metabolism
- Prostatic Neoplasms/pathology
- Receptors, Interleukin-8A/antagonists & inhibitors
- Receptors, Interleukin-8A/genetics
- Receptors, Interleukin-8A/metabolism
- Receptors, Interleukin-8B/antagonists & inhibitors
- Receptors, Interleukin-8B/genetics
- Receptors, Interleukin-8B/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Signal Transduction
- Transcription, Genetic
- Up-Regulation
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Affiliation(s)
- P J Maxwell
- Centre for Cancer Research and Cell Biology, Queens University Belfast, Belfast, Northern Ireland
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Nozell S, Laver T, Patel K, Benveniste EN. Mechanism of IFN-beta-mediated inhibition of IL-8 gene expression in astroglioma cells. THE JOURNAL OF IMMUNOLOGY 2006; 177:822-30. [PMID: 16818736 DOI: 10.4049/jimmunol.177.2.822] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
IL-8 is a chemokine that recruits migrating neutrophils and leukocytes to areas of inflammation. In noninflamed tissue, IL-8 expression is low but can be rapidly induced by proinflammatory cytokines. Typically, inflammation and transient IL-8 expression are beneficial. However, some diseases are characterized by excessive inflammation and high levels of IL-8. Previous studies have shown that IFN-beta can inhibit the expression of IL-8, although the mechanism is unknown. Using chromatin immunoprecipitation assays, we define the IL-8 transcriptional program in the absence or presence of inducing stimuli and/or inhibition by IFN-beta. In the absence of stimuli, the IL-8 promoter is acetylated but negatively regulated by corepressor proteins. Upon PMA stimulation, the levels of these corepressors are reduced and the promoter is rapidly bound and activated by transcription factors, including NF-kappaB p65, C/EBPbeta, and c-Fos. In addition, RNA polymerase II is recruited to the IL-8 promoter to initiate transcription. However, in the presence of both PMA and IFN-beta, there are diminished levels of histone acetylation, reduced levels of transcription factors such as NF-kappaB p65 and RNA polymerase II, and an increased presence of corepressor proteins such as histone deacetylases 1 and 3 and silencing mediator of retinoic acid and thyroid hormone receptors. IFN-gamma-inducible protein-10 and MCP-1 genes, also regulated by NF-kappaB, are unaffected by IFN-beta, and IFN-beta does not prevent the activation, nuclear migration, or binding of NF-kappaB p65 to the kappaB element of the IFN-gamma-inducible protein-10 promoter. As such, these data show that the inhibitory effects of IFN-beta are specific to the IL-8 promoter.
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Affiliation(s)
- Susan Nozell
- Department of Cell Biology, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, USA.
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Trevino JG, Gray MJ, Nawrocki ST, Summy JM, Lesslie DP, Evans DB, Sawyer TK, Shakespeare WC, Watowich SS, Chiao PJ, McConkey DJ, Gallick GE. Src activation of Stat3 is an independent requirement from NF-kappaB activation for constitutive IL-8 expression in human pancreatic adenocarcinoma cells. Angiogenesis 2006; 9:101-10. [PMID: 16871430 DOI: 10.1007/s10456-006-9038-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2006] [Accepted: 06/14/2006] [Indexed: 11/28/2022]
Abstract
Human pancreatic tumors often overexpress the angiogenesis-promoting factor Interleukin 8 (IL-8), in part due to overexpression of NF-kappaB, a frequent occurrence in pancreatic adenocarcinoma. In this study, we demonstrate that reducing c-Src kinase activity, through either pharmacologic inhibition or small interfering RNA-targeted reduction of Src expression, significantly decreased IL-8 expression (P < 0.05) without affecting NF-kappaB-mediated transcription, but by decreasing phosphorylation of STAT3. To ascertain whether Src-mediated expression of IL-8 was dependent on STAT3, we used stable clones expressing a dominant-negative isoform of STAT3 that inhibits endogenous STAT3 phosphorylation and subsequent DNA binding and STAT3-mediated gene expression or a constitutively activated isoform of STAT3. IL-8 expression was significantly lower in clones expressing the dominant-negative isoform and significantly increased in clones expressing the activated isoform (P < 0.05 for both). Pharmacologic inhibition of NF-kappaB activity significantly reduced basal IL-8 expression and tumor necrosis factor-induced IL-8 expression (P < 0.05 for both), yet NF-kappaB activity was not dependent on Src. We therefore suggest that Src activation, through phosphorylation of STAT3, and NF-kappaB are all required for expression of IL-8 a critical angiogenic-promoting factor in pancreatic adenocarcinomas.
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Affiliation(s)
- Jose G Trevino
- Department of Cancer Biology, Unit 179, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
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Eum SY, Rha GB, Hennig B, Toborek M. c-Src is the primary signaling mediator of polychlorinated biphenyl-induced interleukin-8 expression in a human microvascular endothelial cell line. Toxicol Sci 2006; 92:311-20. [PMID: 16611624 DOI: 10.1093/toxsci/kfj194] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Interleukin-8/CXCL8 (IL-8) is a prominent factor that modulates endothelial cell proliferation, migration, and angiogenesis. Therefore, the present study focused on the regulatory mechanisms of IL-8 expression induced by environmental pollutants such as polychlorinated biphenyls (PCBs). Treatment of human microvascular endothelial cells (HMECs) with specific PCB congener, 2,2',4,6,6'-pentachlorobiphenyl (PCB 104), dose dependently increased levels of IL-8 mRNA and secreted protein. IL-8-neutralizing antibody inhibited migration of endothelial cells stimulated by conditioned media derived from PCB 104-treated HMECs. Site-directed mutagenesis of the IL-8 promoter- and DNA-binding assays revealed that activator protein 1 (AP-1) and nuclear factor kappaB (NF-kappaB) sites are required for PCB 104-induced IL-8 transcription. Most importantly, pharmacological inhibition of Src kinase activity or overexpression of dominant-negative c-src in HMECs resulted in a significant decrease in IL-8 expression and promoter activity. In contrast, ectopic expression of activated c-Src markedly increased promoter activity of IL-8. These stimulatory effects of dominant-positive c-src were abrogated by mutagenesis of AP-1- and NF-kappaB-binding sites in the IL-8 promoter.
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Affiliation(s)
- Sung Yong Eum
- Molecular Neuroscience and Vascular Biology Laboratory, Department of Surgery and College of Agriculture, University of Kentucky, 900 South Limestone, Lexington, KY 40536, USA
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Lokshin AE, Winans M, Landsittel D, Marrangoni AM, Velikokhatnaya L, Modugno F, Nolen BM, Gorelik E. Circulating IL-8 and anti-IL-8 autoantibody in patients with ovarian cancer. Gynecol Oncol 2006; 102:244-51. [PMID: 16434085 DOI: 10.1016/j.ygyno.2005.12.011] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Revised: 11/15/2005] [Accepted: 12/06/2005] [Indexed: 01/24/2023]
Abstract
OBJECTIVES In an ongoing effort to identify diagnostic ovarian cancer biomarkers, SEREX (serological analysis of recombinant cDNA expression libraries) technique was employed resulting in detection of 20 known genes, nine ESTs and one novel sequence. Interleukin-8 (IL-8) was one of ovarian cancer-associated antigens identified by SEREX screening. The objective of this study was, therefore, to evaluate the potential importance of circulating anti-IL-8 antibody as ovarian cancer biomarker. METHODS We developed and optimized a new immunofluorescent bead-based assay for detection of anti-IL-8 antibody in blood serum. Circulating IL-8 and anti-IL-8 IgG concentrations were measured in blood sera from 44 patients with early stage (I-II) ovarian cancer, 50 patients with late stage (III-IV) ovarian cancer, 37 patients with benign pelvic masses, and 80 healthy women using the bead-based assay. RESULTS Our data indicate that serum contains IL-8 cytokine, anti-IL-8 antibody, and IL-8:anti-IL-8 complexes. We found that concentrations of IL-8 and anti-IL-8 antibody were elevated in sera of patients with ovarian cancer as compared with healthy controls. Logistic regression analysis of circulating concentrations of anti-IL-8 IgG in patients with stages I-II ovarian cancer versus healthy controls allowed for prediction of early ovarian cancer with 98% specificity, 65.5% sensitivity, 80.3% of patients correctly classified. Combining IL-8 and anti-IL-8 IgG with CA 125 resulted in increased classification power as compared to individual markers analyzed separately. CONCLUSION Thus, IL-8 and anti-IL-8 autoantibody might potentially serve as additional biomarkers for ovarian cancer.
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Affiliation(s)
- Anna E Lokshin
- University of Pittsburgh Cancer Institute, Hillman Cancer Center, University of Pittsburgh, 5117 Centre Avenue, Pittsburgh, PA 15213, USA.
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Atanackovic D, Pollok K, Faltz C, Boeters I, Jung R, Nierhaus A, Braumann KM, Hossfeld DK, Hegewisch-Becker S. Patients with solid tumors treated with high-temperature whole body hyperthermia show a redistribution of naive/memory T-cell subtypes. Am J Physiol Regul Integr Comp Physiol 2005; 290:R585-94. [PMID: 16254130 DOI: 10.1152/ajpregu.00014.2005] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An activation of the immune system might contribute to the therapeutic effect of whole body hyperthermia (WBH) in cancer patients. We explored immune and endocrine responses in patients undergoing high-temperature WBH. Identical parameters were investigated in a separate group of healthy volunteers undergoing physical exercise to rule out effects of sympathetic activation. Lymphocyte subpopulations, lymphocytic expression of a range of adhesion molecules, and serum concentrations of a variety of hormones and cytokines were assessed in cancer patients undergoing high-temperature (60 min at 41.0-41.8 degrees C) WBH (n = 25) and in a separate group of healthy volunteers (n = 10) performing strenuous physical exercise. WBH induced an increase in human growth hormone (hGH), ACTH, and cortisol as well as in TNF-alpha, IL-6, IL-8, and IL-12R. We observed an increase in natural killer (NK) cells and CD56+ NK T cells shortly after initiation of WBH. In contrast, we found a decrease in T cells expressing L-selectin (CD62L) or alpha4beta7 integrin adhesion molecules mediating homing to lymphatic tissues. Accordingly, we observed a decrease in CD45RA+CCR7+ naive and CD45RA-CCR7+ central memory T cells. Numbers of CD45RA-CCR7- memory effector and CD45RA+CCR7 terminally differentiated T cells, on the other hand, remained unchanged. No comparable changes were observed in the group of healthy volunteers. In conclusion, patients with solid tumors treated with WBH show an increase in NK and NK T cells. In a later phase, plasma concentrations of IL-8, hGH, and cortisol increase, correlated with an influx of neutrophils into the peripheral blood. The alterations in T-cell populations suggest that WBH may induce naive and central-memory T cells to enter lymphatic tissue to await antigen exposure and effector T cells to migrate into peripheral tissues to exert their effector function. Although the exercise group may not be an appropriate control to proof the effect of WBH, these changes were not seen in the healthy volunteers performing physical exercise.
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Affiliation(s)
- Djordje Atanackovic
- Department of Oncology/Hematology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
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Trevino JG, Summy JM, Gray MJ, Nilsson MB, Lesslie DP, Baker CH, Gallick GE. Expression and activity of SRC regulate interleukin-8 expression in pancreatic adenocarcinoma cells: implications for angiogenesis. Cancer Res 2005; 65:7214-22. [PMID: 16103072 DOI: 10.1158/0008-5472.can-04-3858] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Interleukin-8 (IL-8) is an angiogenic factor that promotes growth of pancreatic tumors. The purpose of this study was to determine if c-Src, a protein tyrosine kinase frequently overexpressed in pancreatic cancer, regulated IL-8 expression and to elucidate the Src-mediated signaling pathways that contribute to angiogenesis in pancreatic adenocarcinoma cells. In a panel of pancreatic cancer cell lines, expression of total and activated Src correlated with IL-8 production. Furthermore, ectopic expression of activated Src in PANC-1 cells with low endogenous Src activity significantly increased IL-8 production (P < 0.005). In contrast, pharmacologic inhibition of endogenous c-Src kinase activity or small interfering RNA-mediated "knockdown" of c-Src expression in L3.6pl cells with high Src expression and activity caused significant decreases in IL-8 production (P < 0.005). Inhibition of c-Src activity resulted in decreased phosphorylation of Akt, p38, and extracellular signal-regulated kinase (Erk)-1/2. Significant (P < 0.005) dose-dependent decreases were observed in IL-8 expression by inhibiting Src-dependent signaling molecules Erk-1/2 and p38 but not phosphatidylinositol 3-kinase. To assess the relevance of Src inhibition to angiogenesis, in vivo gelfoam assays were done. Robust infiltration of vessels was observed in gelfoam saturated with conditioned medium from pancreatic carcinoma cells. This angiogenesis was nearly abrogated in gelfoams saturated with conditioned medium from cells treated with the Src family kinase inhibitor, PP2 (P < 0.001). Thus, c-Src regulates critical "downstream" signaling pathways that contribute to expression of IL-8 in human pancreatic tumor cells, suggesting c-Src may be a target for therapeutic intervention in pancreatic adenocarcinoma.
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Affiliation(s)
- Jose G Trevino
- Department of Cancer Biology and Surgical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030, USA
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Pae HO, Oh GS, Choi BM, Kim YM, Chung HT. A molecular cascade showing nitric oxide-heme oxygenase-1-vascular endothelial growth factor-interleukin-8 sequence in human endothelial cells. Endocrinology 2005; 146:2229-38. [PMID: 15661856 DOI: 10.1210/en.2004-1431] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Heme oxygenase (HO)-1 has been shown to be an important biological target of nitric oxide (NO). NO can induce HO-1 expression and IL-8 production, particularly, in endothelial cells. Interestingly, HO-1 tends to induce the production of vascular endothelial growth factor (VEGF) that is involved in endothelial IL-8 syntheses. Whether HO-1 expression by NO may provide a link with IL-8 or VEGF synthesis was investigated in human umbilical vein endothelial cells (HUVECs). The NO donor S-nitroso-N-acetyl-penicillamine (SNAP) dose-dependently increased IL-8 and VEGF productions and HO-1 expression in HUVECs. Transfection with either HO-1 small interfering RNA or HO-1 antisense oligodeoxynucleotide abrogated the ability of SNAP to induce HO-1 expression and IL-8 and VEGF productions. Both pharmacological induction and gene transfer of HO-1 directly induced IL-8 and VEGF productions. Anti-VEGF neutralizing antibody blocked SNAP-mediated IL-8 production and VEGF itself induced IL-8 production, whereas anti-IL-8 neutralizing antibody had no effect on VEGF production in SNAP-treated HUVECs. Neither anti-VEGF nor anti-IL-8 antibodies influenced SNAP-induced HO-1 expression. Moreover, neither VEGF nor IL-8 showed an additive effect on SNAP-induced HO-1 expression. HO-1 transfection had no significant effect on productions of other CXC chemokines, such as growth-related oncogen-alpha and epithelial neutrophil activation peptide-78. Taken together, these results provide a molecular cascade showing NO-HO-1-VEGF-IL-8 sequence in human endothelial cells.
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Affiliation(s)
- Hyun-Ock Pae
- Department of Microbiology and Immunology, Wonkwang University School of Medicine, Shinyoung-Dong, Iksan-Shi, Chonbug 570-749, Republic of Korea
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Nyhlén K, Gautam C, Andersson R, Srinivas U. Modulation of cytokine-induced production of IL-8 in vitro by interferons and glucocorticosteroids. Inflammation 2005; 28:77-88. [PMID: 15379213 DOI: 10.1023/b:ifla.0000033023.76110.51] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Interleukin-8 (IL-8) has been implicated in the pathogenesis of inflammation and cancer. Intracellular levels of cytokine-induced IL-8 in human umbilical vein endothelial cells (HUVEC) were modulated using interferons and steroids to further elucidate their mechanism. Basal and cytokine-induced production of IL-8 was studied using a novel ELISA application, flow cytometry, and RT-PCR. The intracellular amount of IL-8 increased after 6-h stimulation with TNF-alpha (30%) or IL-1beta (55%) which was doubled when Golgi transport was disrupted using monensin. IFN-gamma decreased the intracellular amount of IL-8 by 60% in both unstimulated and TNF-alpha-stimulated cells, but only when secretion was blocked using monensin. Dexamethasone inhibited the TNF-alpha-induced production by 33%, but had no effect in unstimulated cells. Our study indicated that both, dexamethasone and IFN inhibit TNF-alpha-induced upregulation of IL-8 at the mRNA level. It could be speculated that they inhibit IL-8 production by affecting different gene regulatory mechanisms.
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Affiliation(s)
- Kristina Nyhlén
- Division of Pharmacology, Department of Medicine and Care, Faculty of Health Science, Linköping, Sweden.
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Nishikawa T, Ramesh R, Munshi A, Chada S, Meyn RE. Adenovirus-mediated mda-7 (IL24) gene therapy suppresses angiogenesis and sensitizes NSCLC xenograft tumors to radiation. Mol Ther 2005; 9:818-28. [PMID: 15194048 DOI: 10.1016/j.ymthe.2004.03.014] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2003] [Accepted: 03/15/2004] [Indexed: 12/11/2022] Open
Abstract
Melanoma differentiation-associated gene-7 (mda-7), recently classified as interleukin-24 (approved gene symbol IL24), is thought to be a tumor suppressor gene based on the loss of its expression in many different types of cancer. Gene therapy by adenovirus-mediated mda-7 (Ad-mda7) gene transfer has been shown to inhibit the growth of several different tumor cell lines, in vitro and in vivo. We previously demonstrated that Ad-mda7 radiosensitized non-small-cell lung cancer (NSCLC) cell lines by enhancing an apoptosis pathway through the activation of JNK and c-Jun. In the present study, we investigated the efficacy of intratumoral administration of Ad-mda7 combined with ionizing radiation for treating A549 xenograft tumors in nude mice. Substantial and long-lasting inhibition of tumor growth was evident following the combined treatment. Histological examination revealed marked reduction of angiogenic factors (bFGF, VEGF) and microvessel density and enhanced apoptosis in the tumors treated with the combination therapy compared to those treated with Ad-mda7 alone or radiation alone. To confirm the radiosensitizing effect of secreted MDA-7 protein, we performed clonogenic survival assays using human umbilical vein endothelial cells (HUVECs), A549 cells, and normal human lung fibroblasts, CCD16 cells, pretreated with the conditioned medium from 293 cells that had been stably transfected with mda-7 or a control vector. The results showed that MDA-7 protein sensitized HUVECs to ionizing radiation but not A549 cells or CCD16 cells. Our results suggest that Ad-mda7 in combination with radiation enhances apoptosis in the tumors and that secreted MDA-7 protein inhibits angiogenesis by sensitizing endothelial cells to ionizing radiation without affecting other normal cells. We conclude that the combination of mda-7 gene therapy and radiotherapy may be a feasible and effective strategy for treatment of NSCLC.
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Affiliation(s)
- Takashi Nishikawa
- Department of Experimental Radiation Oncology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
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Valacchi G, Pagnin E, Phung A, Nardini M, Schock BC, Cross CE, van der Vliet A. Inhibition of NFkappaB activation and IL-8 expression in human bronchial epithelial cells by acrolein. Antioxid Redox Signal 2005; 7:25-31. [PMID: 15650393 DOI: 10.1089/ars.2005.7.25] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Lipid oxidation and environmental pollutants are major sources of alpha,beta-unsaturated aldehydes such as acrolein and 4-hydroxynonenal. Acrolein (2-propenal), a major product of organic combustion such as tobacco smoke, represents the most reactive alpha,beta-unsaturated aldehyde, with high reactivity toward nucleophilic targets such as sulfhydryl groups. To investigate how acrolein affects respiratory tract cell activation, we exposed either primary (NHBE) or immortalized human bronchial epithelial cells (HBE1) to 0-25 microM acrolein, and determined effects on basal and tumor necrosis factor-alpha (TNFalpha)-induced production of the chemokine interleukin (IL)-8. Cell exposure to acrolein dose-dependently suppressed IL-8 mRNA levels in HBE1 cells (26, 40, and 79% at 5, 10, and 25 microM acrolein concentrations, respectively) and resulted in corresponding decreases in IL-8 production. Studies of nuclear factor-kappaB (NFkappaB) activation, an essential event in IL-8 production, showed decreased TNFalpha-induced NFkappaB activation by acrolein, illustrated by inhibition of nuclear translocation of NFkappaB and reduced IkappaBalpha degradation. Immunochemical analysis of IkappaB kinase (IKK), a redox-sensitive regulator of NFkappaB activation, indicated direct modification of the IKK beta-subunit by acrolein, suggesting that acrolein may act directly on IKK. In summary, our results demonstrate that acrolein can suppress inflammatory processes in the airways by inhibiting epithelial IL-8 production through direct or indirect inhibitory effects on NFkappaB activation.
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Affiliation(s)
- Giuseppe Valacchi
- Division of Pulmonary and Critical Care Medicine, UC Davis, Davis, CA 95616, USA
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Agarwal A, Das K, Lerner N, Sathe S, Cicek M, Casey G, Sizemore N. The AKT/IκB kinase pathway promotes angiogenic/metastatic gene expression in colorectal cancer by activating nuclear factor-κB and β-catenin. Oncogene 2004; 24:1021-31. [PMID: 15592509 DOI: 10.1038/sj.onc.1208296] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Our laboratory has delineated that the phosphatidylinositol 3' kinase (PI3K)/AKT/I kappa B kinase (IKK) pathway positively regulates NF kappa B and beta-catenin, both important transcriptional regulators in colorectal cancer (CRC). Therefore, we investigated the effect of inhibiting the PI3K/AKT/IKK alpha pathway in regulating the inappropriate constitutive activation of NF kappa B and beta-catenin in CRC cell lines. SW480 and RKO CRC cell lines demonstrate constitutive activation of AKT as well as both NF kappa B- and beta-catenin-dependent transcription. The constitutive activation of NF kappa B- and beta-catenin-dependent transcription is inhibited by transiently transfecting either kinase dead (KD) IKK alpha, which blocks IKK alpha kinase activity, KD AKT, which blocks AKT activity, or wildtype (WT) PTEN, which inhibits PI3K and AKT activity. The ability of KD IKK alpha, KD AKT or WT PTEN to decrease beta-catenin-dependent transcription is independent of their effects on NF kappa B. Inducible expression of either KD IKK alpha or WT PTEN strongly inhibits both the constitutive NF kappa B- and beta-catenin-dependent promoter and endogenous gene activation. Targeted array-based gene expression analysis of this inducible system reveals that many of the genes downregulated upon inhibition of this pathway are involved in tumor angiogenesis and metastasis. The activation of this pathway and the expression of the three most repressed genes was further analysed in samples of CRC. These results indicate a role of this pathway in controlling gene expression important in tumor progression and metastasis.
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Affiliation(s)
- Anju Agarwal
- Department of Cancer Biology, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA
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Lowrie AG, Salter DM, Ross JA. Latent effects of fibronectin, alpha5beta1 integrin, alphaVbeta5 integrin and the cytoskeleton regulate pancreatic carcinoma cell IL-8 secretion. Br J Cancer 2004; 91:1327-34. [PMID: 15354211 PMCID: PMC2409896 DOI: 10.1038/sj.bjc.6602132] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Interactions between tumour cells and the microenvironment are increasingly recognised to have an influence on cancer progression. In pancreatic carcinoma, a highly desmoplastic stroma with abnormal extracellular matrix (ECM) protein and interleukin-8 (IL-8) expression is seen. To investigate whether the ECM may further contribute to abnormalities in the microenvironment by influencing IL-8 secretion, we cultured the Mia PaCa2 pancreatic carcinoma cell line on fibronectin. This resulted in a dose-dependent increase in IL-8 secretion, which was RGD dependent and accompanied by cell spreading and proliferation. The role of spreading was assessed by disruption of the cytoskeleton with cytochalasin D, resulting in a large increase in IL-8 secretion, which was reduced from 31- to 24-fold by fibronectin. This remarkable response was associated with inhibition of spreading and proliferation and represents a novel cytoskeletal function. To investigate whether it could be accounted for by the loss of integrin-mediated signalling, the expressed α5β1, αVβ5 and α3β1 integrins were inhibited. α5β1 inhibition prevented spreading and proliferation but produced a much smaller rise in IL-8 secretion than cytochalasin D. αVβ5 inhibition alone had only minor effects but when inhibited in combination with α5β1 completely abolished the response to fibronectin. These results reveal latent stimulatory effects of the αVβ5 integrin on IL-8 secretion and suggest that integrin crosstalk may limit the induction of IL-8 secretion by fibronectin. However, the magnitude of IL-8 secretion induced by cytochalasin cannot be accounted for by integrin signalling and may reflect the influence of another signalling pathway or a novel, intrinsic cytoskeletal function.
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Affiliation(s)
- A G Lowrie
- Tissue Injury and Repair Group, 6th Floor, Centre for Inflammation Research, University of Edinburgh Medical School, Teviot Place, Edinburgh EH8 9AG, UK
| | - D M Salter
- Department of Pathology, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, UK
| | - J A Ross
- Tissue Injury and Repair Group, 6th Floor, Centre for Inflammation Research, University of Edinburgh Medical School, Teviot Place, Edinburgh EH8 9AG, UK
- Tissue Injury and Repair Group, 6th Floor, Centre for Inflammation Research, University of Edinburgh Medical School, Teviot Place, Edinburgh EH8 9AG, UK. E-mail:
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Chelouche-Lev D, Miller CP, Tellez C, Ruiz M, Bar-Eli M, Price JE. Different signalling pathways regulate VEGF and IL-8 expression in breast cancer: implications for therapy. Eur J Cancer 2004; 40:2509-18. [PMID: 15519527 DOI: 10.1016/j.ejca.2004.05.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2004] [Accepted: 05/27/2004] [Indexed: 12/31/2022]
Abstract
Elevated expression of pro-angiogenic cytokines is associated with aggressive tumour growth and decreased survival of patients with breast cancer. In general, the breast cancer cell lines with high vascular endothelial growth factor (VEGF) expression also express high levels of interleukin-8 (IL-8). The consequence of inhibiting mitogen-activated protein kinase (MAPK) and phosphatidylinositol-3-kinase (PI3K), both implicated in regulation of these cytokines, was examined in four cell lines. Treatment with the mitogen-activated protein kinase/extracellular signal-related kinase (MEK) inhibitor U0126 reduced expression of VEGF and IL-8 in MDA-MB-231 cells, partially inhibited expression in MDA-MB-468 and Hs578T cells, with minimal effects in GI101A cells. Treatment with LY294002 reduced cytokine expression in GI101A and MDA-MB-468 cells, with partial reduction in Hs578T and less effect in MDA-MB-231 cells. Thus, IL-8 and VEGF were regulated by different signalling pathways in different cell lines; this suggests that inhibition of the dominantly active pathway can downregulate both angiogenic cytokines. Recognising which signalling pathway is active may identify targets for anti-angiogenic therapy of breast cancer.
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Affiliation(s)
- Dina Chelouche-Lev
- Department of Cancer Biology, University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Box 173, Houston, TX 77030, USA
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Murdoch C, Giannoudis A, Lewis CE. Mechanisms regulating the recruitment of macrophages into hypoxic areas of tumors and other ischemic tissues. Blood 2004; 104:2224-34. [PMID: 15231578 DOI: 10.1182/blood-2004-03-1109] [Citation(s) in RCA: 654] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The mechanisms responsible for recruiting monocytes from the bloodstream into solid tumors are now well characterized. However, recent evidence has shown that these cells then differentiate into macrophages and accumulate in large numbers in avascular and necrotic areas where they are exposed to hypoxia. This parallels their tendency to congregate in ischemic areas of other diseased tissues such as atherosclerotic plaques and arthritic joints. In tumors, macrophages appear to undergo marked phenotypic changes when exposed to hypoxia and to switch on their expression of a number of mitogenic and proangiogenic cytokines and enzymes. This then promotes tumor growth, angiogenesis, and metastasis. Here, we compare the various mechanisms responsible for monocyte recruitment into tumors with those regulating the accumulation of macrophages in hypoxic/necrotic areas. Because the latter are best characterized in human tumors, we focus mainly on these but also discuss their relevance to macrophage migration in ischemic areas of other diseased tissues. Finally, we discuss the relevance of these mechanisms to the development of novel cancer therapies, both in providing targets to reduce the proangiogenic contribution made by hypoxic macrophages in tumors and in developing the use of macrophages to deliver therapeutic gene constructs to hypoxic areas of diseased tissues.
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Affiliation(s)
- Craig Murdoch
- Tumor Targeting Group, Academic Unit of Pathology, Division of Genomic Medicine, University of Sheffield Medical School, Beech Hill Rd, Sheffield S10 2RX, United Kingdom
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Marjon PL, Bobrovnikova-Marjon EV, Abcouwer SF. Expression of the pro-angiogenic factors vascular endothelial growth factor and interleukin-8/CXCL8 by human breast carcinomas is responsive to nutrient deprivation and endoplasmic reticulum stress. Mol Cancer 2004; 3:4. [PMID: 14738568 PMCID: PMC343294 DOI: 10.1186/1476-4598-3-4] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2003] [Accepted: 01/22/2004] [Indexed: 04/26/2023] Open
Abstract
Background The expression of pro-angiogenic cytokines, such as vascular endothelial growth factor (VEGF) and interleukin-8/CXCL8 (IL-8), plays an important role in tumor growth and metastasis. Low oxygen tension within poorly-vascularized tumors is thought to be the prime stimulus causing the secretion of VEGF. The expression of IL-8 by solid tumors is thought to be primarily due to intrinsic influences, such as constitutive activation of nuclear factor kappa B (NF-κB). However, VEGF expression is responsive to glucose deprivation, suggesting that low concentrations of nutrients other than oxygen may play a role in triggering the pro-angiogenic phenotype. Glucose deprivation causes endoplasmic reticulum (ER) stress and alters gene expression through the unfolded protein response (UPR) signaling pathway. A branch of the UPR, known as the ER overload response (EOR), can cause NF-κB activation. Thus, we hypothesized that treatments that cause ER stress and deprivation of other nutrients, such as amino acids, would trigger the expression of angiogenic cytokines by breast cancer cell lines. Results We found that glutamine deprivation and treatment with a chemical inducer of ER stress (tunicamycin) caused a marked induction of the secretion of both VEGF and IL-8 protein by a human breast adenocarcinoma cell line (TSE cells). Glutamine deprivation, glucose deprivation and several chemical inducers of ER stress increased VEGF and IL-8 mRNA expression in TSE and other breast cancer cell lines cultured under both normoxic and hypoxic conditions, though hypoxia generally diminished the effects of glucose deprivation. Of all amino acids tested, ambient glutamine availability had the largest effect on VEGF and IL-8 mRNA expression. The induction of VEGF mRNA expression, but not IL-8, was sustained and closely corresponded with the upregulated expression of the ER stress-responsive genes glucose-regulated protein 78 (GRP78) and growth arrest and DNA damage inducible gene 153 (GADD153). Conclusion These results suggest that nutrient deprivation within the solid tumor microenvironment might contribute to the activation of a pro-angiogenic phenotype. The angiogenic switch may act to increase blood supply in response to nutrient deprivation as well as hypoxia.
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Affiliation(s)
- Philip L Marjon
- University of New Mexico, School of Medicine, Department of Biochemistry and Molecular Biology, Albuquerque, NM, 87131, USA
| | | | - Steve F Abcouwer
- University of New Mexico, School of Medicine, Department of Biochemistry and Molecular Biology, Albuquerque, NM, 87131, USA
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