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ALDH1A3 affects colon cancer in vitro proliferation and invasion depending on CXCR4 status
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ALDH1A3 affects colon cancer in vitro proliferation and invasion depending on CXCR4 status
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Journal Article
ALDH1A3 affects colon cancer in vitro proliferation and invasion depending on CXCR4 status
2018
Overview
Background:Aldehyde dehydrogenase (ALDH) has been widely used as a marker of cancer stem cells (CSCs). However, the ALDH family includes 19 members, and the most relevant isoforms and their biological functions in cancer biology are still controversial.Methods:We examined ALDH enzyme activity and the mRNA expression of 19 ALDH members in 58 human cell lines. The biological effect and mechanism of knocking down ALDH1A3 with siRNA and shRNA in cell lines were explored. Finally, the relationship between ALDH1A3 and CXCR4 was analysed in a large panel of cell lines.Results:ALDH1A3 is the key isoform that contributed to Aldefluor positivity in cell lines. Knocking down ALDH1A3 in different cancer cells conferred opposite phenotypes due to differential effects on CXCR4 expression. There was a significant negative correlation between ALDH1A3 and CXCR4 in 58 human cell lines.Conclusions:ALDH1A3 was the main contributor to Aldefluor positivity in human cell lines, and its contrasting effects might arise from differences in CXCR4 expression.
Publisher
Nature Publishing Group
Subject
