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dc.contributor.authorParkinson, Eric K
dc.date.accessioned2010-12-03T12:54:10Z
dc.date.available2010-12-03T12:54:10Z
dc.date.issued1985-10
dc.identifier.citationDefective responses of transformed keratinocytes to terminal differentiation stimuli. Their role in epidermal tumour promotion by phorbol esters and by deep skin wounding. 1985, 52 (4):479-93 Br J Canceren
dc.identifier.issn0007-0920
dc.identifier.pmid2415144
dc.identifier.urihttp://hdl.handle.net/10541/117110
dc.description.abstractEpidermal tumourigenesis can be achieved in rodents by the application of a single subthreshold dose of a carcinogen (initiation) followed by repeated applications of a tumour promoter such as 12-0-tetradecanoyl phorbol, 13-acetate (TPA). TPA induces terminal differentiation in the majority of epidermal keratinocytes in vitro. However, transformed keratinocytes respond weakly to this terminal differentiation signal, and it is suggested that this property allows initiated cells and their progeny to obtain a selective advantage over their normal counterparts during promotion of papilloma formation by TPA. New data are reviewed which suggest that a putative wound hormone TGF-beta has similar differential effects on normal and transformed epithelial cells to those of TPA. It is proposed that the release of TGF-beta from platelets following deep skin wounding may be an explanation as to why wounding is a promoting stimulus but milder forms of epidermal injury are not. Weakly promoting hyperplasiogenic agents are also discussed within the context of a selection theory of tumour promotion.
dc.language.isoenen
dc.subjectCancerous Cell Transformationen
dc.subjectSkin Canceren
dc.subject.meshAnimals
dc.subject.meshCarcinogens
dc.subject.meshCell Differentiation
dc.subject.meshCell Transformation, Neoplastic
dc.subject.meshEpidermis
dc.subject.meshKeratins
dc.subject.meshMice
dc.subject.meshMitosis
dc.subject.meshOncogenes
dc.subject.meshPapilloma
dc.subject.meshPeptides
dc.subject.meshPhenotype
dc.subject.meshPhorbols
dc.subject.meshProtein Kinase C
dc.subject.meshSkin
dc.subject.meshSkin Neoplasms
dc.subject.meshTetradecanoylphorbol Acetate
dc.subject.meshTransforming Growth Factors
dc.titleDefective responses of transformed keratinocytes to terminal differentiation stimuli. Their role in epidermal tumour promotion by phorbol esters and by deep skin wounding.en
dc.typeArticleen
dc.contributor.departmentDepartment of Epithelial Kinetics, Paterson Laboratories, Christie Hospital and Holt Radium Institute, Wilslow Road, Manchester M20 9BX, UK.en
dc.identifier.journalBritish Journal of Canceren
html.description.abstractEpidermal tumourigenesis can be achieved in rodents by the application of a single subthreshold dose of a carcinogen (initiation) followed by repeated applications of a tumour promoter such as 12-0-tetradecanoyl phorbol, 13-acetate (TPA). TPA induces terminal differentiation in the majority of epidermal keratinocytes in vitro. However, transformed keratinocytes respond weakly to this terminal differentiation signal, and it is suggested that this property allows initiated cells and their progeny to obtain a selective advantage over their normal counterparts during promotion of papilloma formation by TPA. New data are reviewed which suggest that a putative wound hormone TGF-beta has similar differential effects on normal and transformed epithelial cells to those of TPA. It is proposed that the release of TGF-beta from platelets following deep skin wounding may be an explanation as to why wounding is a promoting stimulus but milder forms of epidermal injury are not. Weakly promoting hyperplasiogenic agents are also discussed within the context of a selection theory of tumour promotion.


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