Bulk RNA-seq profiling of human head and neck squamous cell carcinoma (HNSCC) with primary tumors and metastatic lymph nodes
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1208459 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR31940868_1.fastq.gz | Fastqsanger.gz | |||
| SRR31940868_2.fastq.gz | Fastqsanger.gz | |||
| SRR31940869_1.fastq.gz | Fastqsanger.gz | |||
| SRR31940869_2.fastq.gz | Fastqsanger.gz | |||
| SRR31940870_1.fastq.gz | Fastqsanger.gz |
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Project description:A classifier was build on 82 training samples to differentiate between lymph node negative (N0) and lymph node metastasis (N+) head and neck squamous-cell carcinomas (HNSCC). The 102 predictor genes that resulted from this classifier where then validated against a independent validation set.
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Project description:Distant metastasis is a major factor associated with poor prognosis in head and neck squamous cell carcinoma (HNSCC), but little is known of its molecular mechanisms. New markers that predict clinical outcome, in particular the ability of primary tumors to develop metastatic tumors, are urgently needed. Here, we identified neurotensin, highly expressed in HNSCCs in comparison with normal tissues, as an invasion-promoting factor in HNSCC by using microarray analysis of clinical samples. Indeed, neurotensin overexpression associated with lymph node metastasis of neck, and tumors exhibiting neurotensin overexpression had a poor distant metastasis-free survival rate. In HNSCC cells which expressed neurotensin receptor 1 (NTSR1), neurotensin promoted cellular invasion, migration, and induction of matrix metalloproteinases transcripts. Disruption of NTSR1 signaling by silencing RNA caused the reversion of the invasion of HNSCC cells. By further microarray analysis using neurotensin-treated cells, neurotensin caused increased expression of genes implicated in tumor progression and metastasis including cell growth, migration, invasion, adhesion, angiogenesis, and apoptosis. Our findings have revealed a critical role of neurotensin/NTSR1 for invasion and migration in the metastatic process of HNSCC. This study raises the possibility that neurotensin/NTSR1 could be used as a possible predictive marker and a molecular therapeutic target in the antimetastatic strategies of HNSCC. Keywords: Identification of a novel therapeutic target for head and neck squamous cell carcinomas A total of 21 primary HNSCC samples were obtained from patients who underwent tumor resection at Chiba University Hospital (Chiba, Japan). 21 samples of normal-appearing mucosa at the margin of the surgical resection several centimeters from the tumor were also collected and designated histologically normal mucosa. 21 HNSCCs and paired normal tissues were used for microarray experiment. The clinicopathological grade was classified according to the criteria of the Japan Society for Head and Neck Cancer. The Ethics Committee of Chiba University approved our study, and informed consent was obtained from all patients for use of their tissue samples and clinical data. Tissue samples were immediately snap frozen in liquid nitrogen and stored at -80°C until use.
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Project description:The involvement of microRNAs (miRNAs) in cancer and their potential as biomarkers of diagnosis, prognosis and response to therapy is becoming increasingly appreciated. The etiology of head and neck squamous cell carcinoma (HNSCC) is predominantly associated with the synergistic effects of tobacco and alcohol use, as well as Human Papilloma Virus (HPV) infection, which embodies a distinct clinical and biological phenotype. We sought to examine whether the profile of miRNAs in HNSCC varies based on HPV status, and to identify specific miRNAs altered in head and neck carcinogenesis. Total RNA was isolated from 16 HNSCC fresh frozen primary tumors, 5 fresh frozen non-diseased head and neck epithelial tissues, and 2 HNSCC cell lines. The miRNA profile of 662 individual miRNAs in these tissues was examined by microarray. 18 miRNAs are significantly altered in their expression between normal tissues and HNSCC tumors and 5 miRNAs are identified as significantly differentially expressed between HPV-positive (HPV+) and HPV-negative (HPV-) tumors. A striking difference in expression pattern of miRNA was also observed between primary tissues and cell lines. These data suggest that the pattern of miRNA expression may be reflective of disease etiology, and may be useful in the realm of diagnostic biomarkers defining broadly responsive prevention and treatment strategies for HNSCC. These data also suggest that cultured tumor cell lines may be inappropriate for novel miRNA biomarker identification. Keywords: miRNA; Disease-state analysis Expression of 662 individual miRNA was assessed in16 HNSCC fresh frozen primary tumors, 5 fresh frozen non-diseased head and neck epithelial tissues, and 2 HNSCC cell lines were arrayed
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