Abstract:
:Chemotherapy failure is the major cause of recurrence and poor prognosis in colorectal cancer (CRC) patients. The role of the differentially expressed lncRNAs in 5-Fluorouracil chemoresistance has not fully explained. Here, we observed lncRNA H19 was associated with the 5-Fu resistance in CRC. Quantitative analysis indicated that H19 was significantly increased in recurrent CRC patient samples. Kaplan-Meier survival analysis indicated that high H19 expression in CRC tissues was significantly associated with poor recurrent free survival. Our functional studies demonstrated that H19 promoted colorectal cells 5-Fu resistance. Mechanistically, H19 triggered autophagy via SIRT1 to induce cancer chemoresistance. Furthermore, bioinformatics analysis showed that miR-194-5p could directly bind to H19, suggesting H19 might work as a ceRNA to sponge miR-194-5p, which was confirmed by Dual-luciferase reporter assay and Immunoprecipitation assay. Extensively, our study also showed that SIRT1 is the novel direct target of miR-194-5p in CRC cells. Taken together, our study suggests that H19 mediates 5-Fu resistance in CRC via SIRT1 mediated autophagy. Our finding provides a novel mechanistic role of H19 in CRC chemoresistance, suggesting that H19 may function as a marker for prediction of chemotherapeutic response to 5-Fu.
journal_name
Cell Death Disjournal_title
Cell death & diseaseauthors
Wang M,Han D,Yuan Z,Hu H,Zhao Z,Yang R,Jin Y,Zou C,Chen Y,Wang G,Gao X,Wang Xdoi
10.1038/s41419-018-1187-4subject
Has Abstractpub_date
2018-11-19 00:00:00pages
1149issue
12issn
2041-4889pii
10.1038/s41419-018-1187-4journal_volume
9pub_type
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