title: Expression profiling of genes and proteins in HaCaT keratinocytes: proliferating versus differentiated state.
abstract: The knowledge of the mechanism of keratinocyte differentiation in culture is still uncompleted. The emergence of new technologies, such as cDNA microarrays or 2D electrophoresis followed by mass spectrometry analysis, has allowed the identification of genes and proteins expressed in biological processes in keratinocytes. Here, we report a genome wide analysis of proliferating versus differentiated human HaCaT keratinocytes. We found that genes and proteins which take part in the cell cycle control, carbohydrate metabolism, cell auto-immunity, adhesion and cytokine signal transduction pathways were regulated in differentiated HaCaT keratinocytes. In addition, we identified seven proteins and 33 transcripts that had not been previously described as differentially expressed in proliferating versus differentiated HaCaT cells. Furthermore, some of these transcripts or proteins were similarly regulated in human primary keratinocytes and in human epidermis. The present study opens new areas of investigation in the comprehension of keratinocyte differentiation.
authors.affiliation: Service de Génomique Fonctionnelle, CEA, Département de Radiobiologie et Radiopathologie, Evry, France.
authors.forename: Gilles
authors.initials: G
authors.lastname: Lemaître
authors.forename: Jérôme
authors.initials: J
authors.lastname: Lamartine
authors.forename: Amandine
authors.initials: A
authors.lastname: Pitaval
authors.forename: Pierre
authors.initials: P
authors.lastname: Vaigot
authors.forename: Jérôme
authors.initials: J
authors.lastname: Garin
authors.forename: Stephan
authors.initials: S
authors.lastname: Bouet
authors.forename: Cyrille
authors.initials: C
authors.lastname: Petat
authors.forename: Pascal
authors.initials: P
authors.lastname: Soularue
authors.forename: Xavier
authors.initials: X
authors.lastname: Gidrol
authors.forename: Michèle T
authors.initials: MT
authors.lastname: Martin
authors.forename: Gilles
authors.initials: G
authors.lastname: Waksman
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000502:physiology; D002454:Cell Differentiation / Q000502:physiology*; D002460:Cell Line; D049109:Cell Proliferation; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D006801:Humans; D015603:Keratinocytes / Q000166:cytology / Q000378:metabolism / Q000502:physiology*; D008969:Molecular Sequence Data; D020411:Oligonucleotide Array Sequence Analysis; D015398:Signal Transduction / Q000502:physiology