Gene profile of human medullary thyroid cancer
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE196264 | GEO | 2022/04/27
REPOSITORIES: GEO
Similar Datasets
Project description:To identify a microRNA profile of human medullary thyroid cancer (MTC), we performed a miRNA microarray analysis exploiting 8 primary tumours and 9 paired neck nodes metastases in comparison with 3 non-neoplastic thyroid tissues.
2018-03-01 | GSE97070 | GEO
Project description:Medullary thyroid cancer (MTC) accounts for less than 5% of all thyroid cancers, and it is a rare neuroendocrine tumor which derives from calcitonin-secreting thyroid C cells.Given the underlying mechanism involved in MTC remain unclear, the development and the specific pathways of MTC require further investigation.here we employed the application of TMT6plex-based LC-MS/MS to identify and analyze the novel differentially-expressed proteins(DEPs) from MTC patients, To our best knowledge, it is the first study to comprehensively investigate the molecular mechanisms of MTC by proteomics technology from Chinese MTC patients’ tissues, and these DEPs identified in our study will provide a better understanding of the underlying pathophysiology of MTC, as well as may provide potential therapeutic targets for patients with MTC.
2020-05-26 | PXD005898 | Pride
Project description:Transcriptional analysis of 49 primary medullary thyroid carcinoma tumors. Comparisons MTCM918T vs MTC634 and MTCM918T vs MTCWT. 49 (52 hybridized tumors with 3 replicates) primary Medullary Thyroid Carcinoma (MTC) cases were hybridized onto a cDNA microarray in order to identify the unique markers for specific genetic classes of MTC.
2013-11-26 | E-GEOD-32662 | biostudies-arrayexpress
Project description:The global microRNA (miRNA) profiling expression was assessed in a large series of both sporadic and hereditary forms of medullary thyroid carcinomas (MTC), and to evaluate the biological function of major found altered miRNAs. For this purpose we investigated miRNA differential expression in tumoral vs adjacent non tumoral tissues from 62 MTC patients, and showed a specific overexpression of miR-375, -129-3p, -376c, -335, -96, -10a, -7, -429 and an underexpression of miR-451 in tumoral tissues. Since miR-375 was the most up-regulated miRNA, we thus decided to identify its targets by combining a transcriptomic signature of cells transfected either with premiR- or antagomiR-375 and an in silico analysis joining TT-cells mRNA specific signature from Cancer Cell Line Encyclopedia GEO dataset and miRNA prediction algorithms. Using this restrictive approach, we focused on miR-375 target SEC23A and validated a decreased expression of SEC23A by Western blotting and by immunohistochemistry in tumoral vs non tumoral adjacent thyroid epithelium. Furthermore, we observed that overexpression of miR-375 was associated with decreased proliferation and increased vandetanib response in vitro. Overall, our results showed an overexpression of miR-375 in MTC in association with a decrease of miR-375-potential targets including SEC23A. Additionnally, we postulate thatmiR-375 overexpression should be evaluated in MTC patients treated with the tyrosine kinase inhibitor, vandetanib.
2016-05-22 | GSE67742 | GEO
Project description:The aim of the study was to identify major gene expression changes associated to sunitinib response in a human medullary thyroid carcinoma (MTC)ﾠmodel.ﾠWe developed an in vitro kinetic microarray study. The humanﾠﾠMTC cell line, the TT cells, were treated with 250 nM sunitinib or vehicle during 1, 3 and 6 days. Total mRNA from sunitinib treated cells were compared to placebo treated ones for each time point.
2011-02-26 | E-TABM-929 | biostudies-arrayexpress
Project description:Medullary thyroid carcinoma (MTC) accounts for 1-2% of thyroid malignancies. It is a disease of few genetic drivers, and the etiology specifically associated with each mutation remains unknown. Here, we investigated the role of aberrant DNA methylation in the MTC development. We performed genome-wide DNA methylation profiling assessing >27,000 CpGs in the largest MTC series reported to date, comprising 48 molecularly characterized tumors. We observed significant differences between the methylation patterns among the samples bearing the RETM918T, RETC634 mutation and “wild-type” (WT) tumors, but not those RAS-related. In detail, the RETM918T –related tumors had a larger number of hypomethylation events when compared to RETC634 – positive and WT ones. Moreover, through the integration of methylation with mRNA and miRNA expression data of the same tumors, we identified genes whose expression is negatively correlated with the methylation status of their promoters. For PLCB2, DKK4, MMP20 as well as miR-10a, -30a and -200c, the impact of promoter methylation levels on expression of these genes in MZ-CRC-1 and TT cell lines was assessed. Finally, the aberrant methylation validation of three of the genes in an independent set of 25 MTCs by bisulfite pyrosequencing suggests their role as MTC methylation markers.
2016-12-31 | GSE72728 | GEO
Project description:Medullary thyroid carcinoma (MTC) accounts for 1-2% of thyroid malignancies. It is a disease of few genetic drivers, and the etiology specifically associated with each mutation remains unknown. Here, we investigated the role of aberrant DNA methylation in the MTC development. We performed genome-wide DNA methylation profiling assessing >27,000 CpGs in the largest MTC series reported to date, comprising 48 molecularly characterized tumors. We observed significant differences between the methylation patterns among the samples bearing the RETM918T, RETC634 mutation and “wild-type” (WT) tumors, but not those RAS-related. In detail, the RETM918T –related tumors had a larger number of hypomethylation events when compared to RETC634 – positive and WT ones. Moreover, through the integration of methylation with mRNA and miRNA expression data of the same tumors, we identified genes whose expression is negatively correlated with the methylation status of their promoters. For PLCB2, DKK4, MMP20 as well as miR-10a, -30a and -200c, the impact of promoter methylation levels on expression of these genes in MZ-CRC-1 and TT cell lines was assessed. Finally, the aberrant methylation validation of three of the genes in an independent set of 25 MTCs by bisulfite pyrosequencing suggests their role as MTC methylation markers.
2016-12-31 | GSE72729 | GEO
Project description:Metastatic medullary thyroid cancer (MTC) is a currently incurable disease. FDA approved therapies that target RET, a commonly mutated receptor tyrosine kinase in MTC, and other receptor tyrosine kinases, do not result in complete responses and acquired resistance is universal due to “gatekeeper” mutation in Ret or overactivation of alternative signaling pathways. Based on data from human MTCs and a number of murine models, the CDK/RB cell cycle pathway is a potential alternative target for MTC. The objective of this study was to determine if CDKs represent therapeutic targets for MTC and to define mechanisms of activity. We demonstrate that targeting the CDK/RB pathway with Palbociclib (CDK4/6 inhibitor) is not cytotoxic to MTC cells but that Dinaciclib (CDK1/2/5/9 inhibitor) remarkably reduced cell viability and proliferation at low doses in two MTC cell lines accompanied by loss of CDK9 and RET protein and mRNA levels. In human tumors, CDK9 protein was highly expressed and array CGH demonstrated copy number gain in 11/30 analyzed tumors. RNA sequencing demonstrated that RNA polymerase II-dependent transcription was markedly reduced by Dinaciclib, consistent with transcriptional mode of action. Subsequent studies using the CDK7 inhibitor, THZ1, demonstrated high potency vs. the MTC cell lines and marked loss of RET mRNA and protein. In silico analysis, and CHIP-Sequencing using H3K27Ac antibody confirmed that RET is associated with a super-enhancer in RET-mutated MTC cells. In summary, this study reveals a novel mechanism of RET transcription regulation that represents a potentially translatable finding for new therapeutic approaches for RET-mutated MTC.
2018-12-25 | GSE114068 | GEO
Project description:Metastatic medullary thyroid cancer (MTC) is a currently incurable disease. FDA approved therapies that target RET, a commonly mutated receptor tyrosine kinase in MTC, and other receptor tyrosine kinases, do not result in complete responses and acquired resistance is universal due to “gatekeeper” mutation in Ret or overactivation of alternative signaling pathways. Based on data from human MTCs and a number of murine models, the CDK/RB cell cycle pathway is a potential alternative target for MTC. The objective of this study was to determine if CDKs represent therapeutic targets for MTC and to define mechanisms of activity. We demonstrate that targeting the CDK/RB pathway with Palbociclib (CDK4/6 inhibitor) is not cytotoxic to MTC cells but that Dinaciclib (CDK1/2/5/9 inhibitor) remarkably reduced cell viability and proliferation at low doses in two MTC cell lines accompanied by loss of CDK9 and RET protein and mRNA levels. In human tumors, CDK9 protein was highly expressed and array CGH demonstrated copy number gain in 11/30 analyzed tumors. RNA sequencing demonstrated that RNA polymerase II-dependent transcription was markedly reduced by Dinaciclib, consistent with transcriptional mode of action. Subsequent studies using the CDK7 inhibitor, THZ1, demonstrated high potency vs. the MTC cell lines and marked loss of RET mRNA and protein. In silico analysis, and CHIP-Sequencing using H3K27Ac antibody confirmed that RET is associated with a super-enhancer in RET-mutated MTC cells. In summary, this study reveals a novel mechanism of RET transcription regulation that represents a potentially translatable finding for new therapeutic approaches for RET-mutated MTC.
2018-12-25 | GSE114069 | GEO
Project description:Sequence data from two medullary thyroid carcinoma patients: WGS datasets generated from tumors and matched normal tissues and RNA-Seq from tumors are included.
| EGAD00001001618 | EGA