Unknown,Transcriptomics,Genomics,Proteomics

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CD40-mediated amplification of local immunity by keratinocytes in impaired by HPV

ABSTRACT: The interaction between the transmembrane glycoprotein surface receptor CD40 expressed by skin keratinocytes (KCs) and its T cell-expressed ligand CD154 was suggested to exacerbate inflammatory skin diseases. However, the full spectrum of CD40-mediated effects by KCs underlying this observation is unknown. Therefore, changes in gene expression after CD40 ligation of KCs were studied by microarrays. CD40-mediated activation for 2 hours stimulated the expression of a coordinated network of immune-involved genes strongly interconnected by IL8 and TNF, while after 24 hours anti-proliferative and anti-apoptotic genes were upregulated. CD40 ligation stimulated the production of chemokines that attracted lymphocytes and myeloid cells from peripheral blood mononuclear cells (PBMCs). Thus, CD40-mediated activation of KCs resulted in a highly coordinated response of genes required for the local development and sustainment of adaptive immune responses. The importance of this process was confirmed by a study on the effects of human papilloma virus (HPV) infection to the KCâs response to CD40 ligation. HPV infection clearly attenuated the magnitude of the response to CD40 ligation and consequently the KCâs capacity to attract PBMCs. The fact that HPV attenuates CD40 signalling in KCs indicates the importance of the CD40-CD154 immune pathway in boosting cellular immunity within epithelia. Total RNA from eight 72 hours 50 IU/ml IFNgamma pre-stimulated primary undifferentiated keratinocyte cultures, four uninfected and four HPV-positive, that were either left unstimulated, or stimulated for 2 hours with IFNgamma and Control- or CD40L-expressing L-cells (mouse fibroblasts), or stimulated for 24 hours with IFNgamma and Control- or CD40L-expressing L-cells. The stimulated samples were generated in duplo. 72 samples were generated in total.

ORGANISM(S): Homo sapiens

SUBMITTER: Bart Tummers

PROVIDER: E-GEOD-54181 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Recurrent venous thromboembolism (VTE) occurs infrequently following a provoked event but occurs in up to 30% of individuals following an initial unprovoked event. We studied 134 patients with VTE separated into 3 groups: (1) âlow-riskâ patients had â¥1 provoked VTE; (2) âmoderate-riskâ patients had no more than 1 unprovoked VTE; (3) âhigh-riskâ patients had â¥2 unprovoked VTE. 44 individuals with no history of VTE were enrolled as healthy controls. Consented individuals were enrolled at 4 medical centers in the US. Total RNA from whole blood was isolated and hybridized to Illumina HT-12 V4 Beadchips to assay whole genome expression. Using class prediction analysis, we distinguished high-risk patients from healthy controls with good receiver operating curve characteristics (AUC=0.88). We also distinguished high-risk from low-risk individuals, moderate-risk individuals from healthy controls, and low-risk individuals from healthy controls with AUCâs of 0.72, 0.77 and 0.72, respectively. Using differential expression analysis, we identified genes relevant to coagulation, immune response and vascular biology, such as SELP and CD46, which were differentially expressed in at least two comparisons. Neither approach distinguished the moderate-risk patients from the high-risk or low-risk groups. Gene expression profiles may provide insights into biological mechanisms associated with patients at risk for recurrent VTE. Prospective studies are needed to validate these findings. This study includes a total of 218 samples/individuals (in 5 groups; APS, high-risk VTE, moderate-risk VTE, low-risk VTE and healthy-controls). Samples in which the percent of probes present was 15% or less (n=51) were excluded leaving 167 samples. The data for these 167 samples were normalized together. However, this record represents the 132 individual samples in the following groups; high-risk (n=40); moderate-risk (n=33); low-risk (n=34); and healthy controls (n=25). The 35 samples in APS group are represented in GSE48001.

Project description:Objective We have previously shown that expression of the CEACAM1 long isoform (CC1-L) in metastatic colorectal cancer (CRC) cells results in significant inhibition of liver metastasis via Chemokine (C-C motif) Ligand 2 (CCL2) and Signal Transducer and Activator of Transcription 3 (STAT3) signaling. Yet, despite recent advances in identifying molecules involved in the CC1-L inhibition of metastasis, much remains to be elucidated regarding the molecular mechanisms orchestrating this pathway. Design We performed an untargeted transcript profiling and a phosphokinase screen between CC1-L-expressing and non-expressing (CT) CRC cells. Identified targets were validated in vitro and in vivo for their involvement in signaling and invasion or metastasis. We validated our conclusions in CRC patient cohorts for time to metastasis development and long-term survival. Results Untargeted transcript profiling revealed high Decorin (Dcn) expression in CC1-L-expressing cells versus CT cells. Decorin was detected at the peri-endothelial layers of large blood vessels and in liver stellate cells. In metastatic lesions, it was expressed in pericyte-like cells covering capillary endothelium. Phosphokinase differential screening revealed reduced Ephrin type-A receptor 2 (EphA2) expression and activity in CC1-L- versus CT-expressing cells. Treatment of CT cells with recombinant Dcn led to decreased migration and invasion and decreased EphA2-mediated Erk and Akt signaling. CRC patients exhibiting high CC1 and DCN expression, in combination with low EPHA2 expression, benefit from longer 10-year survival than those with high EPHA2 expression. Conclusion CC1-L expression in poorly differentiated CRC inhibits liver metastasis through increased Decorin expression and EphA2-mediated signaling. Quadriplicate samples of each mouse colon cancer cell lines (control cells versus those expressing either short or long isoform of CEACAM1) have been used for RNA extraction

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CD40-mediated amplification of local immunity by keratinocytes in impaired by HPV

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