Navigation auf zora.uzh.ch

Search ZORA

ZORA (Zurich Open Repository and Archive)

Concentration-dependent effects of dutasteride on prostate-specific membrane antigen (PSMA) expression and uptake of $^{177}$Lu-PSMA-617 in LNCaP cells

Kranzbühler, Benedikt; Salemi, Souzan; Umbricht, Christoph A; Deberle, Luisa M; Müller, Cristina; Burger, Irene A; Hermanns, Thomas; Sulser, Tullio; Eberli, Daniel (2019). Concentration-dependent effects of dutasteride on prostate-specific membrane antigen (PSMA) expression and uptake of $^{177}$Lu-PSMA-617 in LNCaP cells. The Prostate, 79(12):1450-1456.

Abstract

BACKGROUND: Prostate-specific membrane antigen (PSMA)-based imaging and therapy are increasingly used in the management of prostate cancer. However, low PSMA surface expression in certain patients is a limitation for PSMA-based technologies. We have previously shown that high doses of dutasteride, a 5α-reductase inhibitor generally used for the treatment of benign prostatic enlargement, increase the PSMA expression in vitro. We now further analyzed the concentration- and time-dependent effects of dutasteride in LNCaP cells.
METHODS: Androgen receptor (AR) expressing prostate cancer cells (LNCaP) were treated for 7 to 14 days with vehicle control (0.1% dimethyl sulfoxide) or different concentrations of dutasteride (0.25 , 0.5 , 1 , and 5  μM). In addition to cell proliferation, PSMA surface expression was assessed using flow cytometry (FACS) and immunocytochemistry. Total PSMA and AR expression was analyzed by capillary western immunoassay (WES). In addition, tumor cell uptake and internalization assays of $^{177}$Lu-PSMA-617 were performed.
RESULTS: Dutasteride treatment resulted in a significant upregulation of PSMA surface expression compared to vehicle control after 7 days in all tested concentrations. After 14 days a further, concentration-dependent increase of PSMA surface expression was detectable. Total PSMA protein expression significantly increased after treatment of cells with high concentrations of dutasteride using 5  μM for 7 or 14 days. However, when lower concentrations were used total PSMA expression was not significantly altered compared to vehicle control. Further testing revealed a dose-dependent increase in uptake and internalization of $^{177Lu}$-PSMA-617 after 7 and 14 days. Though, a significantly increased uptake was only observed using a 5  μM dutasteride concentration for 7 days as well as 1  and 5  μM for 14 days.
CONCLUSION: Our investigations revealed a concentration- and time-dependent effect of dutasteride on PSMA expression and uptake of $^{177Lu}$-PSMA-617 in LNCaP cells. A short-term treatment of patients with high doses of dutasteride might increase the detection rate of PSMA-based imaging and increase the effect of $^{177Lu}$-PSMA-617 therapy via upregulation of PSMA expression.

Additional indexing

Other titles:Concentration-dependent effects of dutasteride on prostate-specific membrane antigen (PSMA) expression and uptake of Lu-PSMA-617 in LNCaP cells
Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Urological Clinic
04 Faculty of Medicine > University Hospital Zurich > Clinic for Nuclear Medicine
Dewey Decimal Classification:610 Medicine & health
Scopus Subject Areas:Health Sciences > Oncology
Health Sciences > Urology
Language:English
Date:1 September 2019
Deposited On:19 Jul 2019 11:57
Last Modified:21 Oct 2024 01:40
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:0270-4137
OA Status:Closed
Publisher DOI:https://doi.org/10.1002/pros.23868
PubMed ID:31233227
Related Items:

Metadata Export

Statistics

Citations

Dimensions.ai Metrics
5 citations in Web of Science®
5 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

0 downloads since deposited on 19 Jul 2019
0 downloads since 12 months

Authors, Affiliations, Collaborations

Similar Publications