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Tumor endothelial cells with high aldehyde dehydrogenase activity show drug resistance

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Title: Tumor endothelial cells with high aldehyde dehydrogenase activity show drug resistance
Authors: Hida, Kyoko Browse this author →KAKEN DB
Maishi, Nako Browse this author →KAKEN DB
Akiyama, Kosuke Browse this author →KAKEN DB
Ohmura-Kakutani, Hitomi Browse this author
Torii, Chisaho Browse this author
Ohga, Noritaka Browse this author →KAKEN DB
Osawa, Takahiro Browse this author
Kikuchi, Hiroshi Browse this author
Morimoto, Hirofumi Browse this author
Morimoto, Masahiro Browse this author
Shindoh, Masanobu Browse this author →KAKEN DB
Shinohara, Nobuo Browse this author →KAKEN DB
Hida, Yasuhiro Browse this author →KAKEN DB
Keywords: Aldehyde dehydrogenase (ALDH)
endothelial cell
Issue Date: Nov-2017
Publisher: John Wiley & Sons
Journal Title: Cancer science
Volume: 108
Issue: 11
Start Page: 2195
End Page: 2203
Publisher DOI: 10.1111/cas.13388
Abstract: Tumor blood vessels play an important role in tumor progression and metastasis. We previously reported that tumor endothelial cells (TEC) exhibit several altered phenotypes compared with normal endothelial cells (NEC). For example, TEC have chromosomal abnormalities and are resistant to several anticancer drugs. Furthermore, TEC contain stem cell-like populations with high aldehyde dehydrogenase (ALDH) activity (ALDHhigh TEC). ALDHhigh TEC have proangiogenic properties compared with ALDHlow TEC. However, the association between ALDHhigh TEC and drug resistance remains unclear. In the present study, we found that ALDH mRNA expression and activity were higher in both human and mouse TEC than in NEC. Human NEC:human microvascular endothelial cells (HMVEC) were treated with tumor-conditioned medium (tumor CM). The ALDHhigh population increased along with upregulation of stem-related genes such as multidrug resistance 1, CD90, ALP, and Oct-4. Tumor CM also induced sphere-forming ability in HMVEC. Platelet-derived growth factor (PDGF)-A in tumor CM was shown to induce ALDH expression in HMVEC. Finally, ALDHhigh TEC were resistant to fluorouracil (5-FU) in vitro and in vivo. ALDHhigh TEC showed a higher grade of aneuploidy compared with that in ALDHlow TEC. These results suggested that tumor-secreting factor increases ALDHhigh TEC populations that are resistant to 5-FU. Therefore, ALDHhigh TEC in tumor blood vessels might be an important target to overcome or prevent drug resistance.
Type: article
Appears in Collections:遺伝子病制御研究所 (Institute for Genetic Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 樋田 京子

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