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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Proc+Natl+Acad+Sci+U+S+A
2017 ; 114
(45
): E9635-E9644
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Off-tumor targets compromise antiangiogenic drug sensitivity by inducing kidney
erythropoietin production
#MMPMID29078273
Nakamura M
; Zhang Y
; Yang Y
; Sonmez C
; Zheng W
; Huang G
; Seki T
; Iwamoto H
; Ding B
; Yin L
; Foukakis T
; Hatschek T
; Li X
; Hosaka K
; Li J
; Yu G
; Wang X
; Liu Y
; Cao Y
Proc Natl Acad Sci U S A
2017[Nov]; 114
(45
): E9635-E9644
PMID29078273
show ga
Anti-VEGF drugs are commonly used for treatment of a variety of cancers in human
patients, and they often develop resistance. The mechanisms underlying anti-VEGF
resistance in human cancer patients are largely unknown. Here, we show that in
mouse tumor models and in human cancer patients, the anti-VEGF drug-induced
kidney hypoxia augments circulating levels of erythropoietin (EPO).
Gain-of-function studies show that EPO protects tumor vessels from anti-VEGF
treatment and compromises its antitumor effects. Loss of function by blocking EPO
function using a pharmacological approach markedly increases antitumor activity
of anti-VEGF drugs through inhibition of tumor angiogenesis. Similarly, genetic
loss-of-function data shows that deletion of EpoR in nonerythroid cells
significantly increases antiangiogenic and antitumor effects of anti-VEGF
therapy. Finally, in a relatively large cohort study, we show that treatment of
human colorectal cancer patients with bevacizumab augments circulating EPO
levels. These findings uncover a mechanism of desensitizing antiangiogenic and
anticancer effects by kidney-produced EPO. Our work presents conceptual advances
of our understanding of mechanisms underlying antiangiogenic drug resistance.