Article (Scientific journals)
Sprouty2 loss-induced IL6 drives castration-resistant prostate cancer through scavenger receptor B1.
Patel, Rachana; Fleming, Janis; Mui, Ernest et al.
2018In EMBO Molecular Medicine, 10 (4)
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Sprouty2 Loss-Induced IL6 Drives Castration-Resistant Prostate Cancer Through Scavenger Receptor B1.pdf
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Keywords :
Animals; Humans; Interleukin-6/metabolism; Intracellular Signaling Peptides and Proteins/genetics/metabolism; Male; Membrane Proteins/genetics/metabolism; Mice, Nude; Phenylenediamines/therapeutic use; Prostatic Neoplasms, Castration-Resistant/drug therapy/metabolism; Protein-Serine-Threonine Kinases; Real-Time Polymerase Chain Reaction; Receptor, ErbB-2/genetics/metabolism; Receptors, Scavenger/metabolism; Scavenger Receptors, Class B/antagonists & inhibitors; Signal Transduction/drug effects/physiology; Sulfonamides/therapeutic use; androgen receptor; cholesterol; interleukin 6; prostate cancer; scavenger receptor B1
Abstract :
[en] Metastatic castration-resistant prostate cancer (mCRPC) is a lethal form of treatment-resistant prostate cancer and poses significant therapeutic challenges. Deregulated receptor tyrosine kinase (RTK) signalling mediated by loss of tumour suppressor Sprouty2 (SPRY2) is associated with treatment resistance. Using pre-clinical human and murine mCRPC models, we show that SPRY2 deficiency leads to an androgen self-sufficient form of CRPC Mechanistically, HER2-IL6 signalling axis enhances the expression of androgen biosynthetic enzyme HSD3B1 and increases SRB1-mediated cholesterol uptake in SPRY2-deficient tumours. Systemically, IL6 elevated the levels of circulating cholesterol by inducing host adipose lipolysis and hepatic cholesterol biosynthesis. SPRY2-deficient CRPC is dependent on cholesterol bioavailability and SRB1-mediated tumoral cholesterol uptake for androgen biosynthesis. Importantly, treatment with ITX5061, a clinically safe SRB1 antagonist, decreased treatment resistance. Our results indicate that cholesterol transport blockade may be effective against SPRY2-deficient CRPC.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Patel, Rachana
Fleming, Janis
Mui, Ernest
Loveridge, Carolyn
Repiscak, Peter
Blomme, Arnaud  ;  Université de Liège - ULiège > Stem Cells-Cancer Signaling
Harle, Victoria
Salji, Mark
Ahmad, Imran
Teo, Katy
Hamdy, Freddie C.
Hedley, Ann
van den Broek, Niels
Mackay, Gillian
Edwards, Joanne
Sansom, Owen J.
Leung, Hing Y.
More authors (7 more) Less
Language :
English
Title :
Sprouty2 loss-induced IL6 drives castration-resistant prostate cancer through scavenger receptor B1.
Publication date :
2018
Journal title :
EMBO Molecular Medicine
ISSN :
1757-4676
eISSN :
1757-4684
Publisher :
Wiley-Blackwell, United Kingdom
Volume :
10
Issue :
4
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
© 2018 The Authors. Published under the terms of the CC BY 4.0 license.
Available on ORBi :
since 09 June 2020

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