Interplay Between Gemcitabine and Erlotinib Over Pancreatic Adenocarcinoma Cells.

Abstract:

OBJECTIVES:Pancreatic ductal adenocarcinoma remains as a chemoresistant disease with the poorest prognosis. Gemcitabine has been the standard treatment during the last decade. Erlotinib, a tyrosine kinase inhibitor, in combination with gemcitabine produces a small increase in survival. However, these results remain insufficient. The aim of this study was to investigate the molecular interplay in vitro between them regarding their effects over cytotoxicity, proliferation, apoptosis, and invasion. METHODS:Using the human pancreatic cancer cell lines Panc-1 and BxPC-3 in vitro, the effects of gemcitabine and erlotinib therapy on growth, proliferation, and invasion were tested by cytotoxicity, cell cycle, and Annexin V-Fluorescein Isothiocyanate analysis, reverse transcription polymerase chain reaction, protein expression, and Chip assays. RESULTS:Therapy decreased cell proliferation causing G0/G1 phase cell cycle arrest with induction of apoptosis in the Panc-1 cell line. This blockade was associated with increased p27 expression. Besides, treatments enhanced the nuclear factor-κB (NF-κB) pathway and the binding of NF-κB to the promoters of genes related to the proliferation and the evasion of apoptosis. CONCLUSIONS:Our data suggest that, although gemcitabine and erlotinib exert antiproliferative effects over pancreatic cancer cell lines, the gemcitabine-induced activation of NF-κB expression and its DNA-binding activities are important drawbacks of this treatment against pancreatic cancer.

journal_name

Pancreas

journal_title

Pancreas

authors

Torres C,Linares A,Alejandre MJ,Palomino-Morales RJ,Delgado JR,Perales S

doi

10.1097/MPA.0000000000000452

subject

Has Abstract

pub_date

2016-02-01 00:00:00

pages

269-80

issue

2

eissn

0885-3177

issn

1536-4828

journal_volume

45

pub_type

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