Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from neonatal human foreskin keratinocytes (NHKs) with NFX1-123 endogenous expression, overexpression, or knocked down expression, with or without HPV16E6 co-expression

ABSTRACT: GSM1056261-GSM1056272: NFX1-123 has been shown to associate with a number of RNA processing proteins, such as cytoplasmic poly(A) binding proteins (PABPC), to affect mRNA stability and translational efficiency of target genes. The high-risk human papillomavirus type 16E6 (HPV 16E6) induces telomerase activity by activation of hTERT, the catalytic subunit of telomerase. NFX1-123 can bind to hTERT mRNA and increase its stability in HPV 16E6 expressing keratinocytes (16E6 NHKs). Little is known regarding what other transcripts, and downstream signaling pathways, may be dependent on NFX1-123. In order to determine additional cellular transcripts affected by HPV 16E6 and NFX1-123, we assessed global gene expression changes in cells in which NFX1-123 was overexpressed or knocked down by short hairpin RNAs (shRNA) when compared to an isogenic scramble control, in three independently derived 16E6 NHKs GSM1212499-GSM1212510: NFX1-123 has been shown to associate with a number of RNA processing proteins, such as cytoplasmic poly(A) binding proteins (PABPC), to affect mRNA stability and translational efficiency of target genes. The high-risk human papillomavirus type 16E6 (HPV 16E6) induces telomerase activity by activation of hTERT, the catalytic subunit of telomerase. NFX1-123 can bind to hTERT mRNA and increase its stability in HPV 16E6 expressing keratinocytes (16E6 NHKs). Little is known regarding what other transcripts, and downstream signaling pathways, may be dependent on NFX1-123. In order to determine additional cellular transcripts affected solely by NFX1-123, we assessed global gene expression changes in cells in which NFX1-123 was overexpressed or knocked down by short hairpin RNAs (shRNA) when compared to an isogenic scramble control, in three independently derived NHKs. GSM1056261-GSM1056272: Three independent 16E6 expressing NHK cell lines were expanded and transduced with: short hairpin RNA (sh1) that knocked down NFX1-123 by 20%, short hairpin RNA (sh3) that knocked down NFX1-123 by 80%; a non-targeting isogenic shRNA scramble control; or a NFX1-123 overexpression construct with a FLAG-tag (FNFX1-123WT) that increased its RNA expression on average 3.5-fold. In total, twelve samples were used for the microarray, derived from the three initial NHK cell lines. GSM1212499-GSM1212510: Three independent NHK cell lines were expanded and transduced with: short hairpin RNA (sh1) that knocked down NFX1-123 by 40%, short hairpin RNA (sh3) that knocked down NFX1-123 by 83%; a non-targeting isogenic shRNA scramble control; or a NFX1-123 overexpression construct with a FLAG-tag (FNFX1-123WT) that increased its RNA expression on average 14.0-fold. In total, twelve samples were used for the microarray, derived from the three initial NHK cell lines.

ORGANISM(S): Homo sapiens

SUBMITTER: Rachel Katzenellenbogen

PROVIDER: E-GEOD-43082 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Although high-risk human papillomavirus (HPV) infection plays a major role in the development of cervical cancer, additive oncogenic events are involved as well. One key event involves increased activity of telomerase resulting from a deregulated expression of its catalytic subunit hTERT. Our previous microcell-mediated chromosome transfer studies revealed that introduction of human chromosome 6 in the HPV16 immortalized keratinocyte cell line FK16A and in the HPV16 containing cervical cancer cell line SiHa induced growth arrest, resulting from a repression of hTERT mRNA expression and telomerase activity. Here, this model was used to analyze expression profiles associated with hTERT deregulation in HPV transformed cells. Microarray expression analysis of 12 FK16A/chromosome 6 hybrids, four of which were negative for endogenous hTERT and 8 of which were positive for endogenous hTERT, resulted in the identification of 164 differentially expressed genes. Differential expression of a selection of 5 genes was verified by real-time RT-PCR. Of these 164 genes, 32 were also differentially expressed in other HPV transformed cells with deregulated hTERT. For 2 of these genes, encoding AQP3 and MGP, altered expression in hTERT positive cervical carcinomas was confirmed by real-time RT-PCR and immunohistochemistry, respectively. In summary we identified 32 candidate biomarkers for deregulated hTERT mRNA expression which may enable the identification of cervical premalignant lesions that are at highest risk to progress to invasive cancer. Keywords: microarray expression analysis, hTERT, cervical cancer 12 previously established cell hybrids, all carrying the same genetic background were subjected to microarray expression analysis. These hybrids were generated by the introduction of chromosome 6 in the HPV16 immortalized cell line FK16A, which resulted in a suppression of hTERT expression and telomerase activity. 8 hybrids were endogenous hTERT positive and 8 hybrids were hTERT negative. Additionally primary keratinocytes (hTERT negative), parental cell line FK16A and cervical cancer cell line SiHa (both hTERT positive) were hybridized.

Dataset Information

Expression data from neonatal human foreskin keratinocytes (NHKs) with NFX1-123 endogenous expression, overexpression, or knocked down expression, with or without HPV16E6 co-expression

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