NECTIN-4 increased the 5-FU resistance in colon cancer cells by inducing the PI3K-AKT cascade.

Abstract:

PURPOSE:5-Fluorouracil is the most commonly used drug for the treatment of colon cancer, yet clinical resistance to this drug is frequently observed in patients making this drug ineffective. Thus, identification of gene responsible for 5-FU resistance is of utmost importance. METHODS:Cellular cytotoxicity and expressions of different protein markers in colon cancer cells were measured by MTT assay and Western blotting, respectively. Cell cycle regulation, migration and colony formation ability were measured by FACS, wound-healing assay and clonogenic assay, respectively. RESULTS:Increased NECTIN-4 expression was observed in 5-FU-resistant (5-FU-R) and 5-FU-exposed HCT-116 cells. A significant increase in the cell proliferation, migration, colony formation, and resistant to 5-FU were noted in 5-FU-R cells, but reverse was observed after silencing of NECTIN-4. Apoptosis caused by 5-FU in 5-FU-R cells after NECTIN-4 knockdown indicates that NECTIN-4 is responsible for 5-FU resistance. Cell survival proteins were upregulated in 5-FU-R and NECTIN-4-over-expressed cells and downregulated in NECTIN-4 knockdown or LY294002-pretreated 5-FU-R cells. Drug combination of BCNU + Resveratrol decreased the cell survival and NECTIN-4 expressions in 5-FU-R cells and NECTIN-4-over-expressed cells. CONCLUSIONS:Our data suggest that NECTIN-4 is responsible for 5-FU resistance and BCNU + Resveratrol combination can be used to increase the 5-FU sensitivity.

authors

Das D,Satapathy SR,Siddharth S,Nayak A,Kundu CN

doi

10.1007/s00280-015-2794-8

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

471-9

issue

3

eissn

0344-5704

issn

1432-0843

journal_volume

76

pub_type

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