Microarray Profiling of Circular RNAs in Human Papillary Thyroid Carcinoma
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE93522 | GEO | 2017/02/23
SECONDARY ACCESSION(S): PRJNA360987
REPOSITORIES: GEO
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Project description:CircRNA deregulation could be a crucial event in thyroid carcinoma. To investigate circRNA signatures present in several papillary thyroid carcinoma (PTC) patients to complement our understanding of PTC pathogenesis. Using microarray technology, we screened the circRNA profiles in 3 pairs of PTC tumors and matching adjacent normal tissues. This study evaluated circRNAs expression profiles and their ability to serve as reliable biomarkers and new potential diagnostic and therapeutic targets for PTC
2021-07-07 | GSE173299 | GEO
Project description:The dysregulation of circular RNAs (circRNAs) has been implicated in the development and progression of papillary thyroid cancer (PTC). In this study, we analyzed the dysregulated circRNA profile using PTC tissues and matched adjacent normal tissues by RNA-seq.
2023-07-27 | GSE237841 | GEO
Project description:To evaluate the expression profiles of circular RNAs (circRNAs) in papillary thyroid cancer (PTC) and to find new PTC biomarkers. Objective: The goal of this study was to characterize the expression profiles of circular RNAs (circRNAs) in papillary thyroid carcinoma (PTC), analyze their biological function, and discover new biomarkers for PTC. Methods: From June 2019 to July 2020, 68 patients admitted to Qilu Hospital and confirmed with PTC were included in this study. PTC and paired healthy tissue samples were collected and analyzed. The circRNA expression profiles of 4 pairs of samples were determined using high-throughput sequencing. Differentially expressed circRNAs were discovered to be associated with multiple related microRNAs (miRNAs) and messenger RNAs using bioinformatics analysis (mRNAs). Results: 89 upregulated and 14 downregulated circRNAs were identified in PTC tissues using high-throughput sequencing (fold change ≥ 2; p < 0.05). Among the upregulated circRNAs, we identified 14 significantly regulated circRNAs that play an important role in the pathogenesis of thyroid cancer using the network map of circRNA–miRNA–mRNA interactions. Following that, we validated the expression levels of seven candidate circRNAs (hsa_circ_0031584, hsa_circ_0082002, hsa_circ_0000660, hsa_circ_0067938, hsa_circ_0002483, hsa_circ_0003692, and hsa_circ_0006509) and discovered that among the circRNAs that we verified to be significantly differentially expressed Conclusions: The findings imply that dysregulated circRNAs may play an important role in the pathogenesis of PTC. We also discovered 14 circRNAs that were significantly upregulated and could be used to diagnose and treat PTC.
2022-02-28 | GSE197443 | GEO
Project description:Purpose: Next-generation sequencing (NGS) has revolutionized systems-based analysis of Papillary Thyroid Cancer tissue sample and adjacent normal tissue. The goals of this study are to analysis the different circRNAs expression between Cancer tissue sample and adjacent normal tissue. Quantitative reverse transcription polymerase chain reaction (qRT–PCR) methods and to evaluate protocols for optimal high-throughput data analysis. We performed circRNA-seq in Papillary Thyroid Cancer tissue sample and adjacent normal tissue. We found that through the deep sequencing of four pairs PTC and adjacent nontumor tissues, we identified 16569 circRNAs, 720 circRNAs were differentials expressed, among them, 301 upregulated and 419 downregulated.
2021-03-29 | GSE171011 | GEO
Project description:Papillary thyroid cancer (PTC) is a common endocrine tumor with rapidly increasing incidence in recent years. Although the majority of PTC are relatively indolen and have a good prognosis, it still has a certain proportion of PTC which is highly aggressive with lymphatic metastasis, iodine resistance and easy to recur. Circular RNAs as an class of noncoding RNAs are linked to a variety of tumor processes including PTC. In the current study, a circRNA deep sequencing was performed to identify alterations in circRNA expression levels of PTC tissues. CircTIAM1 was then selected as its increased expression in PTC and associated with migration, apoptosis and proliferation of PTC in vivo and in vitro. Mechanistically, circTIAM1 acted as a sponge of miR-646 and functioned in PTC through targeting mir-646 and HNRNPA1. Fluorescence in situ hybridization (FISH) and luciferase reporter assays further confirmed these connerctions. Overall, our results reveal an important oncogenic role of circTIAM1 in PTC and provide a potentially effective therapeutic strategy for PTC progression.
2021-03-09 | GSE168449 | 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:Circular RNAs (circRNAs), formed by the atypical head-to-tail splicing of exons, have re-emerged as a potentially interesting RNA species given recent reports of a surprising diversity and abundance of circRNA in organisms ranging from worm to human. Here, using deep RNA sequencing, we profiled different RNA species in mouse and observed that circRNAs are significantly enriched in neural tissue, relative to other tissues. Using PacBio sequencing, we determined, for the first time, the circular structure of this population of circRNAs as well as their full-length sequences. We discovered that a disproportionate fraction of the brain circRNA population is derived from host genes that code for synaptic proteins. Moreover, based on the separate profiling of the RNAs localized in neuronal cell bodies and neuropil (enriched in axons and dendrites), we found that, on average, circular RNAs are more enriched in the neuropil than their host gene mRNA isoforms. Using high resolution in situ hybridization we, for the first time, directly visualized circRNA punctae in the dendrites of neurons. The host gene origin and location of the circRNA in neurons suggest the possibility that circRNAs might participate in the regulation of synaptic function and plasticity. Consistent with this idea, we observed via profiling at different developmental stages, that the abundance of many circular RNAs changes abruptly at a time corresponding to synaptogenesis. In addition, following a homeostatic downscaling of neuronal activity many circRNAs exhibit significant up or down-regulation. These data indicate that brain circRNAs are positioned to respond to and regulate synaptic function. Circular RNA profiling in 13 different samples in mice and four samples in rat, using Illumina sequencing
2015-02-25 | E-GEOD-61991 | biostudies-arrayexpress
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:We profiled the gene expression of 11 anaplastic thyroid carcinomas (ATC), 49 papillary thyroid carcinomas (PTC) and 45 normal thyroids (N)
2012-11-09 | GSE33630 | GEO