Article (Scientific journals)
Radiotherapy-activated cancer-associated fibroblasts promote tumor progression through paracrine IGF-1R activation.
Tommelein, Joke; De Vlieghere, Elly; Verset, Laurine et al.
2018In Cancer Research
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Keywords :
cancer; metabolomics
Abstract :
[en] Preoperative radiotherapy (RT) is a mainstay in the management of rectal cancer (RC), a tumor characterized by desmoplastic stroma containing cancer-associated fibroblasts (CAF). Although CAF are abundantly present, the effects of RT to CAF and its impact on cancer cells are unknown. We evaluated the damage responses of CAF to RT and investigated changes in colorectal cancer (CRC) cell growth, transcriptome, metabolome, and kinome in response to paracrine signals emerging from irradiated CAF. RT to CAF induced DNA damage, p53 activation, cell cycle arrest, and secretion of paracrine mediators including insulin-like growth factor-1 (IGF-1). Subsequently, RT-activated CAF promoted survival of CRC cells as well as a metabolic switch favoring glutamine consumption through IGF-1 receptor (IGF-1R) activation. RT followed by IGF-1R neutralization in orthotopic CRC models reduced the number of mice with organ metastases. Activation of the downstream IGF-1R mediator mTOR was significantly higher in matched (intrapatient) samples and in unmatched (interpatient) samples from RC patients after neoadjuvant chemoRT. Taken together, our data support the notion that paracrine IGF-1/IGF-1R signaling initiated by RT-activated CAF worsen CRC progression, establishing a preclinical rationale to target this activation loop to further improve clinical responses and patient survival.
Disciplines :
Oncology
Author, co-author :
Tommelein, Joke
De Vlieghere, Elly
Verset, Laurine
Melsens, Elodie
Leenders, Justine ;  Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Descamps, Benedicte
Debucquoy, Annelies
Vanhove, Christian
Pauwels, Patrick
Gespach, Christian P.
Vral, Anne
De Boeck, Astrid
Haustermans, Karin
De Tullio, Pascal ;  Université de Liège - ULiège > Département de pharmacie > Chimie pharmaceutique
Ceelen, Wim
Demetter, Pieter
Boterberg, Tom
Bracke, Marc
De Wever, Olivier
More authors (9 more) Less
Language :
English
Title :
Radiotherapy-activated cancer-associated fibroblasts promote tumor progression through paracrine IGF-1R activation.
Publication date :
2018
Journal title :
Cancer Research
ISSN :
0008-5472
eISSN :
1538-7445
Publisher :
American Association for Cancer Research, United States - Maryland
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c)2017, American Association for Cancer Research.
Available on ORBi :
since 06 February 2018

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