Journal
PHARMACOLOGICAL RESEARCH
Volume 93, Issue -, Pages 36-42Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phrs.2014.12.006
Keywords
Breast cancer; Transient receptor potential channel 5 (TrpC5); Vascular endothelial growth factor (VEGF); Hypoxia-inducible factor (HIF); Long-term drug treatment
Categories
Funding
- Major Research Plan of the National Natural Science Foundation of China [91439131]
- Natural Science Foundation for Distinguished Young Scholars of Jiangsu Province [BK20140004]
- Program for New Century Excellent Talents in University of The Ministry of Education of China [NCET-12-0880]
- Fundamental Research Funds for the Central Universities [JUSRP51311A]
- National High Technology Research and Development Program (863 Program) of China [SQ2015AA0201349]
- China National Natural Science Foundation [81100185, 81273437, 31200126]
- NSFC-RGC joint grant [81361168001]
- RGC-NSFC joint grant [N_CUHK439/13]
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Chemotherapy targeting anti-angiogenesis in tumors may have insufficient efficacy, but little is known about the underlying mechanisms. Here, we showed that the Ca2+-permeable channel, TrpC5, is highly expressed in human breast cancer after long-term chemotherapy drug-treatment. It mediates downstream hypoxia-inducible factor 1 alpha accumulation in the nucleus, and then activates the transcription of vascular endothelial growth factor which promotes tumor angiogenesis, leading to a poor chemotherapeutic outcome. We verified this mechanism at both the cellular and xenograft levels. Moreover, in samples from patients, high TrpC5 expression was correlated with enhanced tumor vasculature after chemotherapy. Taken together, our research demonstrated the essential role of TrpC5 in tumor angiogenesis when facing the challenge of chemotherapy and presents a new potential target for overcoming the high vasculature of human breast cancer after chemotherapy. (C) 2015 Elsevier Ltd. All rights reserved.
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