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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Gene expression changes by 2,4-dinitrochlorobenzene in human bulge-derived keratinocytes

ABSTRACT: In the epidermis, keratinocytes are involved in physical and first-line immune protection of the host. In this work, we analyzed molecular responses after the addition of contact sensitizers, 2,4-dinitrochlorobenzene (DNCB) using cultured human keratinocytes from the bulge region of a plucked hair follicle (bulge-derived keratinocytes; BDKs) in comparison with neonatal human epidermal keratinocytes NHEK and human monocytic leukemia THP-1. The changes in gene expression by the treatment of DNCB in BDKs were different from those in THP-1. Many genes orchestrating keratinocyte differentiation, which interact TGF-Î² and BMP signaling pathway, were significantly up-regulated in response to DNCB. Keywords: Comparison analysis of gene expression changes by the treatment of DNCB three cell strains composed of four samples; two BDKs established from different donors, NHEK, and THP-1. One replicate per array.

ORGANISM(S): Homo sapiens

SUBMITTER: Tomoko Hashimoto-Tamaoki

PROVIDER: E-GEOD-14838 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Profiling of genes expressed in cultured human keratinocytes established from the bulge region of hair follicles.

Project description:We established a culture method of human keratinocytes from the bulge region of a plucked hair follicle, that contains multipotent epithelial stem cells with high proliferative potential. Using our method, keratinocyte cultures were successfully obtained from all subjects without invasive skin biopsies. We compared the gene expression profiles between the cultured keratinocytes derived from human hair-follicle-bulge (bulgeM-bM-^@M-^Sderived keratinocytes; BDKs) and neonatal human epidermal keratinocytes (NHEKs), and between BDKs from donors with atopic dermatitis and non-atopic controls using microarray analysis. Keywords: expressin profiling Two cell cultures, BDK vs. NHEK cells. 18 BDKs; derived from eighteen healthy volunteers , 6 NHEKs; purchased from Kurabo (Osaka, Japan). One replicate per array.

2013-02-05 | E-GEOD-13709 | biostudies-arrayexpress

Gene expression changes by 2,4-dinitrochlorobenzene in human bulge-derived keratinocytes

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Genome-wide analysis of keratinocyte gene expression during their course of differentiation in presence or absence of JNK1,2-deficient or wildtype immortalized mouse embryonic fibroblasts (MEFs)

Project description:Analysis of keratinocyte differentiation in presence or absence of fibroblast-derived JNK-dependent soluble factors in vitro. The hypothesis tested in the present study was that JNK-dependent fibroblast-derived soluble factors promote an efficient keratinocyte differentiation. Results provide important information about reduced expression of a subset of differentiation associated genes in keratinocytes in the absence of JNK-dependent fibroblast-derived soluble factors. In vitro transwell co-culture experiments were performed using jnk1-/-jnk2-/- or wildtype immortalized mouse embryonic fibroblasts (MEFs) and differentiating primary normal human epidermal keratinocytes (NHEK) over a time course of 6 days. Total RNA was obtained from NHEK prior to cultivation with MEFs (day 0) and every second day (days 2, 4, and 6) during co-culture. MEFs have been described previously in Sabapathy et al. (2004) Mol Cell 15:713-25.

2013-11-26 | E-GEOD-48613 | biostudies-arrayexpress

Interleukin-4 and interleukin-13 cytokines effect on epidermal keratinocytes

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Genome-wide binding of WDR5 and GRHL3

Project description:The antagonistic actions of Polycomb and Trithorax are responsible for proper cell fate determination in mammalian tissues. In the epidermis, a self-renewing epithelium, previous work has shown that release from Polycomb repression only partially explains differentiation gene activation. We now show that Trithorax is also a key regulator of epidermal differentiation, not only through activation of genes repressed by Polycomb in progenitor cells, but also through activation of genes independent of regulation by Polycomb. The differentiation associated transcription factor GRHL3/GET1 recruits the ubiquitously expressed Trithorax complex to a subset of differentiation genes. Examination of WDR5 and GRHL3 binding in human differentited primary keratinocytes (NHEK). High calcium medium was added to NHEK cells at 50% confluency to induce differentiation. Cells were collected for ChIP 24 hours after addition of high calcium medium. ChIP with Wdr5 and Grhl3 antibodies, and an input control were sequenced.

2012-11-10 | E-GEOD-42180 | biostudies-arrayexpress

Expression and ChIP-seq analysis LPS stimulated THP-1 cells

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2012-03-07 | E-GEOD-32325 | biostudies-arrayexpress

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Project description:Resveratrol is a natural product that has gained tremendous interest due to multiple reported health-beneficial effects. However, the underlying mechanisms of action of this compound remained largely controversial. Here, we demonstrate that major biological effects of resveratrol might be attributed to its bicarbonate-induced production of phenolic radicals and reactive oxygen species (ROS) such as superoxide and hydrogen peroxide under physiologically relevant conditions. These products derived from low hormetic micromolar concentrations of resveratrol led to gene expression reprogramming, which was mainly controlled by the redox-sensitive transcription factor nuclear factor (erythroid-derived 2) like 2 (Nrf2), whereas too high concentrations of resveratrol became detrimental for cells. Gentle but significant activation of Nrf2-controlled gene expression resulted in a metabolic switch and reduced cellular redox environment. Thereby cells could be preconditioned against stress, for example to protect primary keratinocytes of the human epidermis from oxidative stress that was induced by metabolization of ethanol. Hormetic shifting of cells by chemical triggers such as resveratrol towards a more reductive state might represent a powerful conceptual framework to improve cellular fitness at low nontoxic concentrations. Total RNA obtained from cultured primary neonatal normal human epidermal keratinocytes (NHEK) subjected to 16 hours treatment with 50 ÂµM resveratrol (trans-3,5,4â-trihydroxystilbene, RSV) compared to vehicle-treated control NHEKs.

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