Genomics

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Identification of a microRNA expression signature for radiochemosensitivity of colorectal cancer cells, involving miRNAs-320a, -224, -132 and let7g


ABSTRACT: Purpose: Preoperative 5-fluorouracil (5-FU) based radiochemotherapy (RCT) represents the standard treatment for locally advanced rectal cancer. Both, tumor response and progression vary considerably. MicroRNAs represent master regulators of gene expression, and may therefore contribute to this heterogeneity. Results: Thirty-six miRNAs were identified to significantly correlate with sensitivity of CRC cell lines to RCT (q < 0.05). This list included miR320a as most significantly correlated as well as other miRNAs involved in the MAPK-, TGF- and Wnt-pathway. Importantly, transfection of selected miRNAs (let7g, miR-132, miR-224, miR-320a and miR-429) each induced a shift of sensitivity (p<0.00001). Moreover, high expression of miR-224 was associated with a poor prognosis in rectal cancer patients (p=0.043).

ORGANISM(S): Homo sapiens

PROVIDER: GSE40976 | GEO | 2013/09/01

SECONDARY ACCESSION(S): PRJNA175468

REPOSITORIES: GEO

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