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Expression data from cells located at the invasive front and in the tumor mass of mouse cervical squamous cell carcinomas

ABSTRACT: Expression data from cells located at the invasive front and in the tumor mass of mouse cervical squamous cell carcinomas

PROVIDER: PRJNA422838 | ENA |

REPOSITORIES: ENA

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Expression data from cells located at the invasive front and in the tumor mass of mouse cervical squamous cell carcinomas

Project description:Cells located at the invasive front and in the tumor mass of mouse cervical squamous cell carcinomas were isolated by laser microdissection from hematoxylin-stained HPV/E2 sections. 7 months old HPV/E2 mice treated with oestrogen develop invasive cervical squamous cell carcinomas. This model recapitulates human invasive cervical neoplasias. We used microarrays to compare the transcriptome of cells located at the invasive front versus cells located in the tumor mass of mouse squamous cell carcinomas.

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Project description:We have characterized the transcriptional program regulated by ETV5 at the invasive front of endometrial carcinomas, by comparing it with non-invasive areas of the same tumor samples. In total 12 samples; 6 superficial (non-invasive) tumor areas and the corresponding invasive tumor zones.

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Human pre-invasive and invasive cervical squamous cell carcinomas and normal cervical epithelia

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Chromosomal signatures of a subset of high-grade premalignant cervical lesions closely resemble invasive carcinomas

Project description:Cervical cancer develops from pre-cancerous high-grade cervical intraepithelial neoplasia (CIN) lesions harbouring a transforming infection with high-risk human papillomavirus (hrHPV), which is characterised by p16INK4a overexpression. Since it takes one or more decades for these pre-cancerous lesions to progress to invasive squamous cell carcinomas (SCCs), it is obvious that they are heterogeneous in terms of duration of existence and progression risk. We performed array-based comparative genomic hybridisation (array CGH) of 46 p16INK4a immuno-positive CIN2/3 lesions to determine whether this heterogeneity is reflected in their chromosomal profiles. Chromosomal profiles of CIN2/3 lesions were related to those of invasive cervical squamous cell carcinomas (SCCs) and promoter methylation of the CADM1 gene, a tumour suppressor gene known to be functionally involved in the tumorigenic phenotype of cervical cancer cells. Frequent alterations found in CIN2/3 lesions included gains located at chromosome 1, 3, 7 and 20 and losses located at 4, 11, 16, 17 and 19. Unsupervised hierarchical clustering identified two subsets of CIN2/3 lesions, chromosomal profiles of one of which closely resembled invasive SCCs. Gains of 1, 3q and 20 were characteristic for CIN2/3 lesions with chromosomal signatures resembling carcinomas. In addition, dense promoter methylation of the CADM1 gene was significantly more frequent in these CIN2/3 lesions (p=0.004). No chromosomal alterations were detected in one p16INK4a positive and five p16INK4a negative CIN1 lesions. These findings suggest that biomarkers associated with gains at chromosomes 1, 3q and 20 are potential hallmarks of advanced p16INK4a positive CIN2/3 lesions with a high short-term risk of progression.

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Transcription profiling of human pre-invasive and invasive cervical squamous cell carcinomas and normal cervical epithelia

Project description:10 normal squamous cervical epitheilia samples, 7 high grade squamous intraepithelial lesions, and 21 invasive squamous cell carcinomas of the cervix samples were obtained using laser capture miicrodissection. Two rounds of T7-based linear RNA amplification using the Arcturus RiboAmp kit were performed for each sample, and assayed using Affymetrix HG_U133A arrays. Experiment Overall Design: 10 normal squamous cervical epitheilia samples, 7 high grade squamous intraepithelial lesions, and 21 invasive squamous cell carcinomas of the cervix, each from different patients, were each assayed on single HG_U133A arrays. Three additional test samples were also assayed. Experiment Overall Design: The log-transformed probe-set values and the results of the statistical analysis for each probe-set, and the associated README file, are included as Supplementary files.

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Characterizing the invasive tumor front of aggressive uterine adenocarcinoma and leiomyosarcoma

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Project description:Coastal front Raw sequence reads

| PRJNA856774 | ENA