Unknown,Transcriptomics,Genomics,Proteomics

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Effects of FGF2 and cell culture surface on the transcriptome of adult human dermal fibroblasts

ABSTRACT: The current study set to determine the effects of Fibroblast Growth Factor 2 and cell culture surface (tissue culture plastic and glass) on the transcriptome of adult human dermal fibroblasts. Transcriptional profiles of adult human dermal fibroblasts grown in four experimental conditions (glass, glass and addition of FGF2, plastic, plastic and addition of FGF2) were compared. Comparison of the transcriptomes will allow to identify significantly differentially expressed genes due to FGF2 and surface treatment, which in turn will allow for identification of the pathways affected by these factors in the human adult fibroblasts. Transcriptome analysis of adult human dermal fibroblasts grown on tissue culture plastic and glass, with and without 4ng/ml FGF2, was performed in two biological replicates and two technical replicates for each treatment condition.

ORGANISM(S): Homo sapiens

SUBMITTER: Tanja Dominko

PROVIDER: E-GEOD-48967 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Hair follicle formation depends on reciprocal epidermal-dermal interactions and occurs during skin development, but not in adult life. This suggests that the properties of dermal fibroblasts change during postnatal development. To examine this, we used a PdgfraEGFP mouse line to isolate GFP-positive fibroblasts from neonatal skin, adult telogen and anagen skin and adult skin in which ectopic hair follicles had been induced (EF skin) by transgenic epidermal activation of beta-catenin. We also isolated epidermal cells from each mouse. The gene expression profile of EF epidermis was most similar to that of anagen epidermis, consistent with activation of beta-catenin signalling. In contrast, adult dermis with ectopic hair follicles more closely resembled neonatal dermis than adult telogen or anagen dermis. In particular, genes associated with mitosis were upregulated and extracellular matrix-associated genes were downregulated in neonatal and EF fibroblasts. We confirmed that sustained epidermal beta-catenin activation stimulated fibroblasts to proliferate to reach the high cell density of neonatal skin. In addition, the extracellular matrix was comprehensively remodelled, with mature collagen being replaced by collagen subtypes normally present only in developing skin. The changes in proliferation and extracellular matrix composition originated from a specific subpopulation of fibroblasts located beneath the sebaceous gland. Our results show that adult dermis is an unexpectedly plastic tissue that can be reprogrammed to acquire the molecular, cellular and structural characteristics of neonatal dermis in response to cues from the overlying epidermis. We have isolated the following populations of cells from mouse back skin by flow cytometry: 1A) GFP+ WT neonatal dermal fibroblasts, 1B) ItgA6+ WT neonatal epidermal keratinocytes, 2A) GFP+ WT telogen dermal fibroblasts, 2B) ItgA6+ WT telogen epidermal keratinocytes, 3A) GFP+ D2 transient activation (anagen) dermal fibroblasts, 3B) ItgA6+ D2 transient activation (anagen) epidermal keratinocytes, 4A) GFP+ D2 sustained activation (ectopic follicles) dermal fibroblasts, 4B) ItgA6+ D2 sustained activation (ectopic follicles) epidermal keratinocytes

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Effects of FGF2 and cell culture surface on the transcriptome of adult human dermal fibroblasts

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