Unknown,Transcriptomics,Genomics,Proteomics

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Transcriptional profiling of CD8 cells laser captured from skin biopsies at dermal-epidermal junction and at deeper dermal area near blood vessel during the healed phase of mucocutaneous HSV-2 reactivation

ABSTRACT: We aim to get a comprehensive analysis on gene expression of CD8a+ T-cells during the post healed phases of HSV-2 reactivation at different anatomic location (CD8a+ cells at dermal-epidermal junction versus CD8a+ cells in deeper dermal area near blood vessel). Our hypothesis is that JC_CD8 cells may function as a resident effector-like T-cells while BV_CD8 cells may be infiltrating cells from circulation. CD8 cells were immunofluorescently stained and laser captured from genital skin biopsies at dermal-epidermal junction at 2 and 8 weeks post healed (JC_2wks_CD8 and JC_8wks_CD8) and at deeper dermal area near blood vessel (BV_2wks_CD8 and BV_8wks_CD8); total RNA were purified from captured cells and cDNA were amplified from the total RNA using NuGEN pico kits

ORGANISM(S): Homo sapiens

SUBMITTER: Tao Peng

PROVIDER: E-GEOD-44975 | 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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Transcriptional profiling of CD8 cells laser captured from skin biopsies at dermal-epidermal junction and at deeper dermal area near blood vessel during the healed phase of mucocutaneous HSV-2 reactivation

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