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The human papillomavirus type 8 (HPV8) is associated with skin cancer development. The goal of this study was to investigate the effects of HPV8 oncoproteins on cellular gene expression and the identification of key regulators. We performed affymetrix microarray analyses to identify differentially expressed genes and common sequence motifs and identified Sp1/3 binding sites as being crucial. In transient transfection assays, we confirmed that HPV8-E7 stimulates the activity of Sp1/3 promoters. Interestingly, the HPV8-E7 mutant, which cannot trigger keratinocyte invasion was unable to activate fibronectin gene expression. In skin models or HPV8 positive skin cancers we found a peculiar deposition of fibronectin in the dermal compartment, and a correlation of Sp3 and fibronectin in the nucleus of HPV8-positive keratinocytes. Taken together, we identified that HPV8-E7 exerts control over cellular gene expression through Sp1/3 binding motifs, which may contribute to HPV8-mediated keratinocyte transformation and subsequent fibronectin-dependent invasion.
This article was published in the following journal.
Human papillomavirus 8 (HPV8) is associated with the development of squamous cell carcinomas (SCC) of the skin. HPV-infected keratinocytes are able to over-ride normal checkpoint control mechanisms an...
Studies have indicated that sympathetic activity enhances GLUT4 expression (Slc2a4 gene) by activating beta-adrenergic receptors. This could be mediated by a direct enhancer effect of cyclic AMP-respo...
Intron gigantism, where genes contain megabase-sized introns, is observed across species, yet little is known about its purpose or regulation. Here we identify a unique gene expression program utilize...
The oncogenic Kaposi's sarcoma-associated herpesvirus (KSHV) has two distinct life cycles with lifelong latent/non-productive and a sporadic lytic-reactivating/productive phases in the infected immune...
ID-1 gene codes for a helix-loop-helix (HLH) protein that inhibits the DNA binding and transcriptional activation function of these proteins.
To Test Effect of Soy Supplementation on Cellular Markers in Normal and Cancerous Breast Tissue using a Randomized Placebo Controlled Study. Objectives: - To determine (by immun...
AR is a steroid hormone receptor that regulates various genes' expression and affects cellular proliferation and differentiation. Androgens interact with AR, exert their paracrine action o...
Background: Exercise represents an important challenge for the homeostasis of the entire body that occurs on a cellular and systemic level in which micronutrients play an important role in...
This project investigates the effect of ACE-inhibition on cellular metabolism by gene expression profiling of human muscle tissue, obtained by biopsy prior to and after ramipril intake. ...
The purpose of this study is to analyze the gene expression patterns associated with various microenvironmental stresses in tumors to understand their roles in tumor progression and treatm...
The expression of a gene in an abnormal place, or at an abnormal time in an organism. Ectopic Gene Expression is often induced artificially by genetic techniques.
A form of gene interaction whereby the expression of one gene interferes with or masks the expression of a different gene or genes. Genes whose expression interferes with or masks the effects of other genes are said to be epistatic to the effected genes. Genes whose expression is affected (blocked or masked) are hypostatic to the interfering genes.
Cis-acting regulatory sequences in the HIV long terminal repeat (LTR) which play a major role in induction or augmentation of HIV gene expression in response to environmental stimuli such as mitogens, phorbol esters, or other viruses. The HIV enhancer is the binding site for many cellular transcription factors including the nuclear factor NF-kappa B.
Proteins encoded by homeobox genes (GENES, HOMEOBOX) that exhibit structural similarity to certain prokaryotic and eukaryotic DNA-binding proteins. Homeodomain proteins are involved in the control of gene expression during morphogenesis and development (GENE EXPRESSION REGULATION, DEVELOPMENTAL).
Cellular DNA-binding proteins encoded by the c-myc genes. They are normally involved in nucleic acid metabolism and in mediating the cellular response to growth factors. Elevated and deregulated (constitutive) expression of c-myc proteins can cause tumorigenesis.
The process of gene expression is used by eukaryotes, prokaryotes, and viruses to generate the macromolecular machinery for life. Steps in the gene expression process may be modulated, including the transcription, RNA splicing, translation, and post-tran...
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