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DIFFERENTIAL GENE EXPRESSION OF MEDULLARY THYROID CARCINOMA REVEALS SPECIFIC MARKERS ASSOCIATED WITH GENETIC CONDITIONS.

ABSTRACT: Transcriptional analysis of 49 primary medullary thyroid carcinoma tumors. Comparisons MTCM918T vs MTC634 and MTCM918T vs MTCWT.

ORGANISM(S): Homo sapiens

PROVIDER: GSE32662 | GEO | 2013/11/26

SECONDARY ACCESSION(S): PRJNA147045

REPOSITORIES: GEO

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DIFFERENTIAL GENE EXPRESSION OF MEDULLARY THYROID CARCINOMA REVEALS SPECIFIC MARKERS ASSOCIATED WITH GENETIC CONDITIONS.

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

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Project description:This study aims to investigate the microRNA profile in human medullary carcinoma tissue by microarray analysis and RT-qPCR. Matched tumor and adjacent normal tissue were obtained from 24 patients and analysed using human microRNA Microarray Kit Agilent, Differentially expressed miRNAs were validated by RT-qPCR using 37 other tumors samples (validation set), Associations of microRNA expression with clinicopathological items were studied Matched tumor and adjacent normal frozen tissues were obtained from thyroid of 40 patients. Normal tissue (name with suffix S) and lesionnal tissue (name with suffix L) were hybridized on microarray.

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Project description:Medullary thyroid cancer is the neoplasm of the calcitonin-producing parafollicular cells of the thyroid gland. The hormone calcitonin acts to lower the blood calcium level, counteracting the effects of the parathyroid hormone; it can also serve as a biomarker for the presence or recurrence of medullary thyroid cancer. Surgery is the only curative treatment for this cancer. Targeted therapeutics vandetanib and cabozantinib are approved for the treatment of aggressive and metastatic tumors that are not amenable to surgery. The use of these multikinase inhibitors are supported by the observed overactivation of the RET oncoprotein in a large sub-population of medullary thyroid cancers; however, not all patients carry oncogenic alterations of this kinase. Hence, there is a need for molecular characterization of medullary tumors on the genomic scale with the aim of identifying targetable mutations. Here, we describe the genomic profiles of two medullary thyroid cancers and report the presence of a putative oncogenic BRAF fusion in one. Such alterations previously observed in other malignancies and known targets of available drugs, can benefit patients who currently have no therapy options.

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