Genome-wide expression screening discloses long noncoding RNAs involved in thyroid carcinogenesis
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE83520 | GEO | 2016/08/03
SECONDARY ACCESSION(S): PRJNA326252
REPOSITORIES: GEO
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Project description:Context: Long non-coding RNAs (lncRNAs) regulate pathological processes, yet their potential roles in papillary thyroid carcinoma (PTC) are poorly understood. Objective: To profile transcriptionally dysregulated lncRNAs in PTC and identify lncRNAs associated with clinicopathological characteristics. We performed RNA sequencing of 12 paired PTC tumors and matched noncancerous tissues and correlated the expression of lncRNAs with clinical parameters.
2016-08-03 | E-GEOD-83520 | biostudies-arrayexpress
Project description:Long noncoding RNAs (lncRNAs) have been proved to play important roles in cancer biology. To understand their expression profile and potential functions in papillary thyroid carcinoma (PTC), we investigated the lncRNA and mRNA expression in PTC and paired adjacent noncancerous thyroid tissues using microarray analysis.
2015-07-16 | GSE66783 | GEO
Project description:Papillary thyroid carcinoma (PTC) is the most common type of thyroid cancer. Histologically normal appearing tissue adjacent to the tumor (NAT) from PTC patients is commonly used as a control in thyroid cancer studies, but the molecular characteristics of NAT tissue are not well characterized. The aim of this study was to characterize the global gene expression profile of NAT and compare it with those of normal and tumor thyroid tissues. We performed RNA sequencing of three categories of thyroid tissue samples including NAT, normal thyroid (N), and PTC tumor (T). Transcriptome analysis shows that NAT presents a unique gene expression profile, which was not associated with sex and the presence of lymphocytic thyroiditis. Among the differentially expressed genes (DEGs) of NAT vs N, 247 coding genes and 6 noncoding genes have been reported as cancer genes, being involved in cell proliferation, apoptosis, and tumorigenesis. In addition, dysregulated expression of ribosomal and small RNAs was identified in NAT. IPA analyses revealed that “Cellular Response to Therapeutics, Cardiovascular Disease, Organismal Injury and Abnormalities, Cancer, and Cellular Movement” appeared as major dysregulated pathways in the NAT tissues. This study provides a comprehensive study of the PTC transcriptome, which provides improved insight into the complexity of gene expression changes during PTC tumorigenesis.
2021-01-29 | GSE165724 | GEO
Project description:Thyroid gland is among the most sensitive organs to ionizing radiation. Whether low-dose radiation-induced papillary thyroid cancer (PTC) differs from sporadic PTC is yet unknown. We used microarrays to identify gene signature of radiation-induced papillary thyroid carcinomas
2015-12-31 | GSE35570 | GEO
Project description:We profiled the gene expression of 11 anaplastic thyroid carcinomas (ATC), 49 papillary thyroid carcinomas (PTC) and 45 normal thyroids (N) We hibridized a series of anaplastic thyroid carcinomas (ATC) and papillary thyroid carcinomas (PTC) onto Affymetrix U133 Plus 2.0 arrays. ATCs were obtained from different hospitals in France and Belgium. Paired RNA samples of PTCs and non-tumoral thyroid tissues were obtained from Ukraine via the Chernobyl Tissue Bank (www.chernobyltissuebank.com). Diagnoses were confirmed by the members of the International Pathology Panel of the Chernobyl Tissue Bank.
2012-11-09 | E-GEOD-33630 | biostudies-arrayexpress
Project description:Anaplastic thyroid carcinoma (ATC) is a rare but deadly thyroid cancer. In contrast, papillary thyroid carcinoma (PTC) is common and highly curable. Minimally invasive biomarkers are needed to distinguish ATC and PTC. Here, by small RNA-seq we show the differential expression levels of several miRNAs, which include miR-34a and miR-210 in ATC compared to PTC cell lines.
2022-07-22 | GSE207677 | GEO
Project description:Well-differentiated tumours (WDT) of the thyroid gland can be difficult to diagnose. Focal nuclear clearing can be suggestive of a papillary thyroid carcinoma (PTC), while questionable vascular or capsular penetration may raise the possibility of diagnosis of a follicular thyroid carcinoma (FTC). The recently proposed term “thyroid tumours of uncertain malignant potential” (TT-UMP) defines cases showing inconclusive morphological evidence of malignancy. We use microRNA (miRNA) expression profiling to analyze 42 well differentiated thyroid tumours including 7 follicular tumours of uncertain malignant potential (FT-UMP), 6 well differentiated tumours of uncertain malignant potential (WDT-UMP), 7 follicular thyroid adenomas (FTA), 5 follicular variant of papillary thyroid carcinoma (FV-PTC) 6 follicular thyroid carcinoma (FTC), and 11 conventional papillary thyroid carcinoma (C-PTC) with 6 C-PTC mutated for BRAFV600E (C-PTC-mut) and 5 not mutated: wild type (C-PTC-wt). Comparison of these 13 tumours of uncertain malignant potential (7 FT-UMP and 6 WDT-UMP) with those obtained from 16 PTC (11 C-PTC and 5 FV-PTC), 6 FTC and 7 FTA is performed in order to clarify the relationships between TT-UMP and the morphologically well characterized categories of thyroid tumours (i.e. C-PTC, FV-PTC, FTC and FTA). In first, each pathological sample (“L” for Lesional tissue) is compared with its matched control (“S” for Safe tissue) for the 42 patients (84 miRNA microarray slides). This control was taken from the same patient at a large distance from the tumour. Secondly, the perilesional tissue from the same patients but 2 (1 PTC and 1 adenoma, without enough RNA left) is compared to normal thyroid tissue (safe tissue reference) obtained from a patient who underwent total thyroidectomy for a laryngeal carcinoma that partially invaded the thyroid gland, to search for microRNA signatures of perilesional tissues (80 miRNA microarray slides).Experiments is performed with a miRNA microarray, referenced in GEO under the accession number GPL4717 (http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GPL4717). 42 Patients: 7 FT-UMP, 6 WDT-UMP, 7 FTA (+1 duplicate sample), 5 FV-PTC, 6 FTC (+ 2 duplicate samples), and 11 C-PTC. 44 dye-swap pairs and 1 with no dye swap pair for a total of 89 samples.
2011-08-21 | E-GEOD-15740 | biostudies-arrayexpress
Project description:Papillary thyroid carcinoma (PTC) is the most common malignant phenotype of thyroid cancer, with a rapidly increasing number of new cases globally. Multifocality is a common phenomenon in patients with PTC. The tumor microenvironment (TME) plays a pivotal role in cancer progression in papillary thyroid carcinoma (PTC), yet the composition and phenotype of cells within TME in bilateral PTCs are poorly understood.
2022-04-13 | GSE191288 | GEO
Project description:Mice with thyroid-specific expression of oncogenic BRAF (Tg-Braf) develop papillary thyroid cancers (PTC) that are locally invasive and have well-defined foci of poorly differentiated thyroid carcinoma (PDTC). To investigate the PTC-PDTC progression, we performed a microarray analysis using RNA from paired samples of PDTC and PTC collected from the same animals by laser capture microdissection. Analysis of 8 paired samples revealed a profound deregulation of genes involved in cell adhesion and intracellular junctions, with changes consistent with an epithelial-mesenchymal transition (EMT). This was confirmed by IHC, as vimentin expression was increased and E-cadherin lost in PDTC compared to adjacent PTC. Moreover, PDTC stained positively for phospho-Smad2, suggesting a role for transforming growth factor-beta (TGFbeta) in mediating this process. Accordingly, TGFbeta induced EMT in primary cultures of thyroid cells from Tg-Braf mice, whereas wild-type thyroid cells retained their epithelial features. TGFbeta-induced Smad2 phosphorylation, transcriptional activity and induction of EMT required MAPK pathway activation in Tg-Braf thyrocytes. Hence, tumor initiation by oncogenic BRAF renders thyroid cells susceptible to TGFbeta-induced EMT, through a MAPK-dependent process. Comparing the transcription profiles of 8 pairs of murine poorly differentiated thyroid cancer and papillary thyroid cancer collected from the same animals by laser capture microdissection. Co-hybridizations were done in triplicate with a single dye flip.
2011-03-22 | E-GEOD-27668 | biostudies-arrayexpress
Project description:Long noncoding RNAs (lncRNAs) have been shown to play a significant role in cancer biology. The aim of this study was to determine roles of lncRNAs in differences of clinical features related to the of papillary thyroid carcinoma (PTC) patients with or without Hashimoto's thyroiditis (HT). In the present study, we detected the differentially expressed lncRNAs in tumor tissues of PTC with or without HT by lncRNA microarrays. qRT-PCR, cell viability assay, cell cycle analysis and bioinformatics tools were used to verify and analyze the data. We found that 1031 lncRNAs and 1338 mRNAs were abnormally expressed in 10 tissue samples of PTC complicated with HT compared to pure PTC. Gene Ontology and pathway analyses of the mRNAs suggested that several biological processes and pathways, especially immune system processes, were promoted in PTC complicated with HT. Twenty lncRNAs were verified in 31 PTC complicated with HT and 64 pure PTC specimens using qRT-PCR, and the results were consistent with the microarrays data. Specifically, ENST00000452578, a down-regulated lncRNA in PTC complicated with HT, was negatively correlated with tumor size. Cell viability assay revealed that ENST00000452578 could inhibit cell proliferation. Co-expression analysis revealed that PPM1H, an mRNA regulated by ENST00000452578, may play an important role in cell cycle arrest. Our results indicate that lncRNAs and mRNAs plays an important role in the different clinical characteristics of PTC patients with or without HT, which might provide new insight from the perspective of RNA into the understanding of the cancers.
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