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2016 ; 15
(6
): 1134-43
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gab.com Text
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Resistance to Antiangiogenic Therapies by Metabolic Symbiosis in Renal Cell
Carcinoma PDX Models and Patients
#MMPMID27134180
Jiménez-Valerio G
; Martínez-Lozano M
; Bassani N
; Vidal A
; Ochoa-de-Olza M
; Suárez C
; García-Del-Muro X
; Carles J
; Viñals F
; Graupera M
; Indraccolo S
; Casanovas O
Cell Rep
2016[May]; 15
(6
): 1134-43
PMID27134180
show ga
Antiangiogenic drugs are used clinically for treatment of renal cell carcinoma
(RCC) as a standard first-line treatment. Nevertheless, these agents primarily
serve to stabilize disease, and resistance eventually develops concomitant with
progression. Here, we implicate metabolic symbiosis between tumor cells distal
and proximal to remaining vessels as a mechanism of resistance to antiangiogenic
therapies in patient-derived RCC orthoxenograft (PDX) models and in clinical
samples. This metabolic patterning is regulated by the mTOR pathway, and its
inhibition effectively blocks metabolic symbiosis in PDX models. Clinically,
patients treated with antiangiogenics consistently present with histologic
signatures of metabolic symbiosis that are exacerbated in resistant tumors.
Furthermore, the mTOR pathway is also associated in clinical samples, and its
inhibition eliminates symbiotic patterning in patient samples. Overall, these
data support a mechanism of resistance to antiangiogenics involving metabolic
compartmentalization of tumor cells that can be inhibited by mTOR-targeted drugs.
|*Drug Resistance, Neoplasm/drug effects
[MESH]
|*Xenograft Model Antitumor Assays
[MESH]
|Angiogenesis Inhibitors/pharmacology/*therapeutic use
[MESH]