Cited by 155Drug Transport and Resistance MechanismsAngiogenesis and VEGF in CancerCancer Cells and Metastasis

Tumor Endothelial Cells Acquire Drug Resistance by MDR1 Up-Regulation via VEGF Signaling in Tumor Microenvironment

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Akiyama, Kosuke, Ohga, Noritaka, Hida, Yasuhiro, Kawamoto, Taisuke, Sadamoto, Yoshihiro, Ishikawa, Shuhei, Maishi, Nako, Akino, Tomoshige +5 more·2012·The American Journal of Pathology

Abstract

Tumor endothelial cells (TECs) are therapeutic targets in anti-angiogenic therapy. Contrary to the traditional assumption, TECs can be genetically abnormal and might also acquire drug resistance. In this study, mouse TECs and normal ECs were isolated to investigate the drug resistance of TECs and the mechanism by which it is acquired. TECs were more resistant to paclitaxel with the up-regulation of multidrug resistance (MDR) 1 mRNA, which encodes the P-glycoprotein, compared with normal ECs. Normal human microvascular ECs were cultured in tumor-conditioned medium (CM) and became more resistant to paclitaxel through MDR1 mRNA up-regulation and nuclear translocation of Y-box-binding protein 1, which is an MDR1 transcription factor. Vascular endothelial growth factor (VEGF) receptor 2 (VEGFR2) and Akt were activated in human microvascular ECs by tumor CM. We observed that tumor CM contained a significantly high level of VEGF. A VEGFR kinase inhibitor, Ki8751, and a phosphatidylinositol 3-kinase-Akt inhibitor, LY294002, blocked tumor CM-induced MDR1 up-regulation. MDR1 up-regulation, via the VEGF-VEGFR pathway in the tumor microenvironment, is one of the mechanisms of drug resistance acquired by TECs. We observed that VEGF secreted from tumors up-regulated MDR1 through the activation of VEGFR2 and Akt. This process is a novel mechanism of the acquisition of drug resistance by TECs in the tumor microenvironment.

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Crossref · 10.1016/j.ajpath.2011.11.029

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  • TECs contain stem cell-like populations and overexpress MDR1 and aldehyde dehydrogenase, becoming resistant to chemotherapeutics such as paclitaxel and 5-fluorouracil in vitro.

    “TECs contain stem cell-like populations and overexpress MDR1 and aldehyde dehydrogenase (ALDH) and become resistant to chemotherapeutics such as paclitaxel and 5-fluorouracil in vitro [43, 44].”

    From Tumor microenvironment complexity and therapeutic implications at a glance (2020) · cites this paper as [43]

    The section “TECs Are Resistant to Anticancer Drugs” reports higher MDR1 expression and greater paclitaxel resistance in TECs than in normal endothelial cells. The introductory passage reports 5-fluorouracil resistance in hepatocellular carcinoma endothelial cells, but this paper does not establish that the studied TECs resist 5-fluorouracil. The passages do not support the stem cell-like population or ALDH-overexpression claims. (LLM, conf=0.87)

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Research works printed but not linked: 1

  1. Akiyama et al AJP March 2012, Vol. 180, No. 3

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Authors
Akiyama, K., Ohga, N., Hida, Y., Kawamoto, T., Sadamoto, Y., Ishikawa, S., Maishi, N., Akino, T., Kondoh, M., Matsuda, A., Inoue, N., Shindoh, M., & Hida, K.
Affiliations
Hokkaido University (JP)
Corresponding author
Hida, Kyoko
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2012-03
Volume
180
Issue
3
Pages
1283-1293
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2164617822
Cited by
154
References
58
Citations by year
2026: 2 · 2025: 6 · 2024: 6 · 2023: 9 · 2022: 9 · 2021: 13 · 2020: 14 · 2019: 11 · 2018: 10 · 2017: 21 · 2016: 13 · 2015: 11 · 2014: 9 · 2013: 15 · 2012: 5
FWCI
6.32
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ministry of Education, Culture, Sports, Science and Technology (21659458, 20390506)
  • AIAA Foundation
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
Keywords
tumor endothelial cells, drug resistance, MDR1, P-glycoprotein, VEGF signaling, VEGFR2, Akt, tumor microenvironment, paclitaxel resistance, YB-1, tumor-conditioned medium, anti-angiogenic therapy, microvascular endothelial cells, phosphatidylinositol 3-kinase
MeSH terms
Antineoplastic Agents, Phytogenic, Humans, Neoplasms, Phenylurea Compounds, Quinolines, Transplantation, Heterologous, Signal Transduction, Up-Regulation, Paclitaxel, Drug Resistance, Neoplasm, ATP Binding Cassette Transporter, Subfamily B, Member 1, Vascular Endothelial Growth Factor Receptor-2, Vascular Endothelial Growth Factor A, Endothelial Cells, Cell Proliferation, Tubulin Modulators, Y-Box-Binding Protein 1, Tumor Microenvironment

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