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Autophagy in 5-Fluorouracil Therapy in Gastrointestinal Cancer: Trends and Challenges.

Abstract：

OBJECTIVE:5-Fluorouracil (5-FU)-based combination therapies are standard treatments for gastrointestinal cancer, where the modulation of autophagy is becoming increasingly important in offering effective treatment for patients in clinical practice. This review focuses on the role of autophagy in 5-FU-induced tumor suppression and cancer therapy in the digestive system. DATA SOURCES:All articles published in English from 1996 to date those assess the synergistic effect of autophagy and 5-FU in gastrointestinal cancer therapy were identified through a systematic online search by use of PubMed. The search terms were "autophagy" and "5-FU" and ("colorectal cancer" or "hepatocellular carcinoma" or "pancreatic adenocarcinoma" or "esophageal cancer" or "gallbladder carcinoma" or "gastric cancer"). STUDY SELECTION:Critical reviews on relevant aspects and original articles reporting in vitro and/or in vivo results regarding the efficiency of autophagy and 5-FU in gastrointestinal cancer therapy were reviewed, analyzed, and summarized. The exclusion criteria for the articles were as follows: (1) new materials (e.g., nanomaterial)-induced autophagy; (2) clinical and experimental studies on diagnostic and/or prognostic biomarkers in digestive system cancers; and (3) immunogenic cell death for anticancer chemotherapy. RESULTS:Most cell and animal experiments showed inhibition of autophagy by either pharmacological approaches or via genetic silencing of autophagy regulatory gene, resulting in a promotion of 5-FU-induced cancer cells death. Meanwhile, autophagy also plays a pro-death role and may mediate cell death in certain cancer cells where apoptosis is defective or difficult to induce. The dual role of autophagy complicates the use of autophagy inhibitor or inducer in cancer chemotherapy and generates inconsistency to an extent in clinic trials. CONCLUSION:Autophagy might be a therapeutic target that sensitizes the 5-FU treatment in gastrointestinal cancer.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Tang JC,Feng YL,Liang X,Cai XJ

doi

10.4103/0366-6999.176069

subject

Has Abstract

pub_date

2016-02-20 00:00:00

pages

456-63

issue

eissn

0366-6999

issn

2542-5641

pii

ChinMedJ_2016_129_4_456_176069

journal_volume

129

pub_type

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Autophagy in 5-Fluorouracil Therapy in Gastrointestinal Cancer: Trends and Challenges.