2017
DOI: 10.18632/oncotarget.16828
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Curcumin enhances the effects of irinotecan on colorectal cancer cells through the generation of reactive oxygen species and activation of the endoplasmic reticulum stress pathway

Abstract: Although initially effective against metastatic colorectal cancer (CRC), irinotecan-based chemotherapy leads to resistance and adverse toxicity. Curcumin is well known for its anti-cancer effects in many cancers, including CRC. Here, we describe reactive oxygen species (ROS) generation and endoplasmic reticulum (ER) stress as important mechanisms by which curcumin enhances irinotecan's effects on CRC cells. CRC cell lines were treated with curcumin and/or irinotecan for 24 h, and then evaluated using cell prol… Show more

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Cited by 76 publications
(51 citation statements)
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“…In this study, we also studied the effect of curcumin on intracellular calcium levels and the results showed a significant decrease in the intracellular concentration of Ca 2+ in HepG2 cells of control groups which were elevated after administration of curcumin in a time-dependent manner. These results were in accordance with the results of [41] that suggested that curcumin-induced apoptosis and cell cycle arrest in colorectal cancer cells by increasing intracellular calcium levels. Calcium overload has been shown to play a critical role in the mechanism of initiation and regulation of cell apoptosis.…”
Section: Discussionsupporting
confidence: 93%
“…In this study, we also studied the effect of curcumin on intracellular calcium levels and the results showed a significant decrease in the intracellular concentration of Ca 2+ in HepG2 cells of control groups which were elevated after administration of curcumin in a time-dependent manner. These results were in accordance with the results of [41] that suggested that curcumin-induced apoptosis and cell cycle arrest in colorectal cancer cells by increasing intracellular calcium levels. Calcium overload has been shown to play a critical role in the mechanism of initiation and regulation of cell apoptosis.…”
Section: Discussionsupporting
confidence: 93%
“…In addition, Huang et al reported that curcumin could increase the impacts of irinotecan on CRC cells by effect on cell viability and apoptosis, which is similar to our results [21].…”
Section: Cytotoxic Effects Of Dox In Combination With Curcumin On Hctsupporting
confidence: 92%
“…As shown by R. Sharma and T. Smith, the ATP content was significantly increased, while glucose (18F-FDG) incorporation was decreased in colorectal cancer cells treated with irinotecan for 72 h (28). In work by Huang et al irinotecan treatment increased ROS generation in two human colorectal cancer cell lines, and this promoted apoptosis and reduced cell viability (29). Irinotecan elevated fatty acid oxidation (FAO) capacity in mouse tissues (liver and muscle) after treatment (30), and this effect was considered to be a common response to the increased energy demands when under genotoxic stress (because FAO provides reducing equivalents-NADH, FADH 2 , for efficient ATP generation via mitochondrial OXPHOS).…”
Section: Discussionmentioning
confidence: 89%