1
|
Tóth V, Somlai B, Hatvani Z, Szakonyi J, Gaudi I, Kárpáti S. Melanoma Screening in a Hungarian Nuclear Power Plant. Pathol Oncol Res 2012; 19:323-8. [DOI: 10.1007/s12253-012-9587-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 11/07/2012] [Indexed: 10/27/2022]
|
2
|
Zhu N, Lalla R, Eves P, Brown TLH, King A, Kemp EH, Haycock JW, MacNeil S. Melanoma cell migration is upregulated by tumour necrosis factor-alpha and suppressed by alpha-melanocyte-stimulating hormone. Br J Cancer 2004; 90:1457-63. [PMID: 15054471 PMCID: PMC2409669 DOI: 10.1038/sj.bjc.6601698] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
We reported recently that the inflammatory cytokine tumour necrosis factor α (TNF-α) can upregulate integrin expression, cell attachment and invasion of cells through fibronectin in a human melanoma cell line (HBL). Furthermore, the actions of TNF-α were suppressed by the addition of an anti-inflammatory peptide α-melanocyte-stimulating hormone (α-MSH). In the current study, we extend this work investigating to what extent TNF-α might stimulate melanoma invasion by promoting cell migration and whether α-MSH is also inhibitory. Two human melanoma cell lines were examined in vitro (HBL and C8161) using a scratch migration assay. Analysis using either time-lapse video microscopy or imaging software analysis of migrating ‘fronts’ of cells revealed that C8161 cells migrated more rapidly than HBL cells. However, when cells were stimulated with TNF-α both cell types responded with a significant increase in migration distance over a 16–26 h incubation time. α-Melanocyte-stimulating hormone had an inhibitory effect on TNF-α-stimulated migration for HBL cells, completely blocking migration at 10−9 M. In contrast, C8161 cells did not respond to α-MSH (as these cells have a loss-of-function melanocortin-1 receptor). However, stable transfection of C8161 cells with the wild-type melanocortin-1 receptor produced cells whose migration was significantly inhibited by α-MSH. In addition, the use of a neutralising antibody to the β1-integrin subunit significantly reduced migration in both cell types. This data therefore supports an inflammatory environment promoting melanoma cell migration, and in addition shows that α-MSH can inhibit inflammatory stimulated migration. The data also support a fundamental role of the β1-integrin receptor in melanoma cell migration.
Collapse
Affiliation(s)
- N Zhu
- Section of Human Metabolism, Division of Clinical Sciences (North), Northern General Hospital, Sheffield S5 7AU, UK
- Department of Reconstructive Burns and Plastic Surgery, Northern General Hospital Trust, Sheffield S5 7AU, UK
| | - R Lalla
- Section of Human Metabolism, Division of Clinical Sciences (North), Northern General Hospital, Sheffield S5 7AU, UK
- Department of Reconstructive Burns and Plastic Surgery, Northern General Hospital Trust, Sheffield S5 7AU, UK
| | - P Eves
- Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S5 7AU, UK
| | - T L H Brown
- Department of Reconstructive Burns and Plastic Surgery, Northern General Hospital Trust, Sheffield S5 7AU, UK
| | - A King
- Cardiovascular Research Group, Division of Clinical Sciences (North), Northern General Hospital, Sheffield S5 7AU, UK
| | - E H Kemp
- Section of Human Metabolism, Division of Clinical Sciences (North), Northern General Hospital, Sheffield S5 7AU, UK
| | - J W Haycock
- Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S5 7AU, UK
- Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S5 7AU, UK. E-mail:
| | - S MacNeil
- Section of Human Metabolism, Division of Clinical Sciences (North), Northern General Hospital, Sheffield S5 7AU, UK
- Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S5 7AU, UK
| |
Collapse
|
3
|
Zhu N, Eves PC, Katerinaki E, Szabo M, Morandini R, Ghanem G, Lorigan P, MacNeil S, Haycock JW. Melanoma cell attachment, invasion, and integrin expression is upregulated by tumor necrosis factor alpha and suppressed by alpha melanocyte stimulating hormone. J Invest Dermatol 2002; 119:1165-71. [PMID: 12445207 DOI: 10.1046/j.1523-1747.2002.19516.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have previously shown alpha-melanocyte stimulating hormone to protect melanocytes and melanoma cells from the proinflammatory actions of tumor necrosis factor-alpha. The aim of the study was to extend this work to look into the influence of tumor necrosis factor-alpha on melanoma cell attachment, invasion, and integrin expression and ask to what extent alpha-melanocyte stimulating hormone might protect cells from tumor necrosis factor-alpha stimulation of increased integrin expression. HBL human melanoma cells were studied under resting and stressed conditions using tumor necrosis factor-alpha as a proinflammatory cytokine. Functional information on the actions of tumor necrosis factor-alpha on melanoma cells was obtained by examining the strength of attachment of melanoma cells to substrates and the ability of melanoma cells to invade through fibronectin. alpha3, alpha4, and beta1 integrin expression was detected by Western immunoblotting and the ability of alpha-melanocyte stimulating hormone to oppose the actions of tumor necrosis factor-alpha was studied on HBL cell attachment, invasion, and integrin subunit expression. Our results show that tumor necrosis factor-alpha increases the number of melanoma cells attaching to collagen (types I and IV) and tissue culture polystyrene, increases ability to invade through fibronectin, and upregulates the expression of alpha3 (28%), alpha4 (90%), and beta1 (65%) integrin subunit expression. In contrast, alpha-melanocyte stimulating hormone reduced cell attachment, invasion, and integrin expression and opposed the stimulatory effects of tumor necrosis factor-alpha. In conclusion this study provides further evidence of alpha-melanocyte stimulating hormone acting to "protect" melanoma cells from proinflammatory cytokine action. Our data support a hypothesis that an inflammatory environment would promote melanoma invasion and that the anti-invasive actions of alpha-melanocyte stimulating hormone are consistent with its working in an anti-inflammatory capacity.
Collapse
Affiliation(s)
- Ningwen Zhu
- Department of Engineering Materials, Sir Robert Hadfield Building, Sheffield, UK
| | | | | | | | | | | | | | | | | |
Collapse
|