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Transcriptome and microRNA array analyses reveal a stimulatory effect of the phytochemical shikonin on epithelial–mesenchymal transition (EMT) in mouse skin

ABSTRACT: This SuperSeries is composed of the following subset Series: GSE32694: Transcriptome and microRNA array analyses reveal a stimulatory effect of the phytochemical shikonin on epithelial–mesenchymal transition (EMT) in mouse skin [gene expression profile] GSE32695: Transcriptome and microRNA array analyses reveal a stimulatory effect of the phytochemical shikonin on epithelial–mesenchymal transition (EMT) in mouse skin [microRNA expression profile] Refer to individual Series

ORGANISM(S): Mus musculus

SUBMITTER: Ning-Sun Yang

PROVIDER: E-GEOD-32696 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Transcriptome and microRNA array analyses reveal a stimulatory effect of the phytochemical shikonin on epithelial–mesenchymal transition (EMT) in mouse skin [gene expression profile]

Project description:We investigate and define here the in vivo biological effects of shikonin, at the transcriptome and microRNA levels, in mouse skin tissues. Through cross-examination between total RNA transcripts and microRNA data sets, we predicted that shikonin treatment may affect the epithelial–mesenchymal transition (EMT) process and the expression of related microRNAs, including 200a, 200b, 200c, 141, 205 and 429 microRNAs, in test skin tissue. Indeed, further in vivo tests on mouse abdominal skin tissue confirmed the stimulatory effect of shikonin on regulatory molecules of the EMT process in epidermal tissue. In addition, RT-PCR analyses confirmed the downregulating effects of shikonin on the expression of microRNA 205 and members of the microRNA 200 family, which are known to be involved in the EMT process. Gene expression of two RNA targets of the microRNA 200 family in EMT regulation, namely Sip1 (Zeb2) and Tcf8 (Zeb1), were consistently upregulated by shikonin treatment. We demonstrate here that shikonin can confer a potent stimulatory effect on the EMT process and suppress the associated-microRNAs expression in vivo in skin tissues. In order to systematically evaluate the effects of shikonin on mouse skin tissues, we next compared the gene expression profiles in shikonin-treated and acetone-treated skin tissues at different time points. Total RNA samples were collected at indicated time points for transcriptome and microRNA array analyses.

2011-12-31 | E-GEOD-32694 | biostudies-arrayexpress

Transcriptome and microRNA array analyses reveal a stimulatory effect of the phytochemical shikonin on epithelial–mesenchymal transition (EMT) in mouse skin [microRNA expression profile]

2011-12-31 | E-GEOD-32695 | biostudies-arrayexpress

Vav proteins orchestrate a keratinocyte auto/paracrine program critical for skin tumorigenesis.

Project description:Cutaneous squamous tumors rely on autocrine/paracrine loops for proper fitness. Targeting this Achilles’ heel is therefore considered a potential avenue for patient treatment. However, the mechanisms that engage and sustain such programs during tumor ontogeny are poorly understood. Here, we show that two Rho/Rac activators, the exchange factors Vav2 and Vav3, control the expression of an epithelial autocrine/paracrine program that regulates keratinocyte survival and proliferation as well as the creation of an inflammatory microenvironment. Vav proteins are also critically involved in some of the subsequent autocrine signaling loops activated in keratinocytes. The genetic inactivation of both Vav proteins reduces tumor multiplicity without hampering skin homeostasis, thus suggesting that pan-specific Vav therapies may be useful in skin tumor prevention and treatment. The dorsal skin of WT and DKO mice (Vav2-/-;Vav3-/-) were treated with either one or four applications of phorbol ester 12-O-tetradecanoylphorbol-13 acetate (TPA) (6.8 nmol in 200 μl acetone) two days after shaving. As control, we applied 200 μl of acetone. Animals were euthanized 24 hours after treatment.

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Expression profile of shikonin resistant K562 cell line

Project description:After over 25cycle and 18month's induction of shikonin, K562 cell show maginal resistance to shikonin but great change in gene expression We use microarray to detect the global gene expression change of shikonin resistant cell K562 cell was treated by 4uM shikonin for 4hours, then allowed to die and grow back in fresh medium. Once recovered, cells were immidiatly subjected to another treatment.

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Network Analysis of Skin Tumor Progression Identifies a Rewired Genetic Architecture Affecting Inflammation and Tumor Susceptibility (papillomas)

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2010-12-22 | E-GEOD-21263 | biostudies-arrayexpress

Transcription profiling by array of mouse back skin of wild type and Range knockout animals after aceton treatment.

Project description:In order to identify critical changes in the genetic network of Rage signaling induced by TPA throughout a 48 h kinetic, global gene expression analysis was performed. Total RNA from untreated, 24h acetone- and 6, 12, 24, 48 h TPA-treated wt and Rage KO back skin was prepared (n=3 independent animal experiments) and hybridized on 4x44K whole mouse genome oligonucleotide microarrays.

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Inflammation and tumor susceptibility in skin cancer

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2010-12-22 | E-GEOD-21264 | biostudies-arrayexpress

Transcriptome and microRNA array analyses reveal a stimulatory effect of the phytochemical shikonin on epithelial–mesenchymal transition (EMT) in mouse skin [gene expression profile]

2011-12-31 | GSE32694 | GEO