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E-GEOD-64912

ABSTRACT: RNA-Sequencing of human papillary thyroid carcinomas

OTHER RELATED OMICS DATASETS IN: PRJNA272493

PROVIDER: E-GEOD-64912 | ExpressionAtlas | 2025-01-24

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-64912-analysis-methods.tsv	Tabular
	E-GEOD-64912-analytics.tsv	Tabular
	E-GEOD-64912-analytics.tsv.undecorated	Tabular
	E-GEOD-64912-analytics.tsv.undecorated.unrounded	Tabular
	E-GEOD-64912-analytics.tsv.unrounded	Tabular

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Project description:RNA-Sequencing of human papillary thyroid carcinomas

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Project description:Experiment a) Establishment of expression profiles in conventional papillary thyroid carcinomas (PTCs) with a BRAF mutation vs. PTCs without a BRAF mutation and using normal thyroid (TN) specimens as reference. Experiment b) Establishment of expression profiles in follicular adenomas (FAs) of the thyroid and follicular variant of papillary thyroid carcinomas (FVPTCs).

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PIAS2b dsRNAi repression kills by mitotic catastrophe anaplastic thyroid and non-thyroid carcinomas, but not normal thyroid or differentiated carcinomas

Project description:The E3 SUMO ligase PIAS2 is expressed at high levels in differentiated papillary thyroid carcinomas but at low levels in anaplastic thyroid carcinomas (ATC), an undifferentiated cancer with very high mortality. Double-stranded RNA–directed RNA interference (dsRNAi) targeting the PIAS2 isoform beta (PIAS2b) inhibits growth of ATC cell lines and patient primary cultures in vitro and orthotopic patient-derived xenografts (oPDX) in vivo, but not of thyroid cell lines or non-anaplastic primary thyroid cultures (differentiated carcinoma, benign lesions, or normal). PIAS2b-dsRNAi also has an anti-cancer effect on other anaplastic human cancers (pancreas, lung, and gastric). Mechanistically, PIAS2b is required for proper mitotic spindle and centrosome assembly, and it is a dosage-sensitive protein in ATC. Strikingly, PIAS2b-dsRNAi induces mitotic catastrophe at prophase. High-throughput proteomics revealed the proteasome (PSMC5) and spindle cytoskeleton as direct targets of PIAS2b SUMOylation at mitotic initiation. PIAS2b-dsRNAi is a promising therapy for ATC and other aggressive anaplastic cancers.

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