Association Between SLC16A5 Genetic Variation and Cisplatin-Induced Ototoxic Effects in Adult Patients With Testicular Cancer.

Drögemöller, Britt I; Monzon, Jose G; Bhavsar, Amit P; Borrie, Adrienne E; Brooks, Beth; Wright, Galen E B; Liu, Geoffrey; Renouf, Daniel J; Kollmannsberger, Christian K; Bedard, Philippe L; Aminkeng, Folefac; Amstutz, Ursula; Hildebrand, Claudette A; Gunaretnam, Erandika P; Critchley, Carol; Chen, Zhuo; Brunham, Liam R; Hayden, Michael R; Ross, Colin J D; Gelmon, Karen A; ... (2017). Association Between SLC16A5 Genetic Variation and Cisplatin-Induced Ototoxic Effects in Adult Patients With Testicular Cancer. JAMA oncology, 3(11), pp. 1558-1562. American Medical Association 10.1001/jamaoncol.2017.0502

[img] Text
jamaoncology_Drgemller_2017_br_170006.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (281kB) | Request a copy

Importance Cisplatin-induced ototoxic effects are an important complication that affects testicular cancer survivors as a consequence of treatment. The identification of genetic variants associated with this adverse drug reaction will further our mechanistic understanding of its development and potentially lead to strategies to prevent ototoxic effects. Objective To identify the genetic variants associated with cisplatin-induced ototoxic effects in adult testicular cancer patients. Design, Setting, and Participants This retrospective study was performed by the Canadian Pharmacogenomics Network for Drug Safety using patients recruited from 5 adult oncology treatment centers across Canada. Male patients who were 17 years or older, diagnosed with germ cell testicular cancer, and previously treated with cisplatin-based chemotherapy were recruited from July 2009 to April 2013 using active surveillance methodology. Cisplatin-induced ototoxic effects were independently diagnosed by 2 audiologists. Patients were genotyped for 7907 variants using a custom pharmacogenomic array. Logistic regression was used to identify genetic variants that were significantly associated with ototoxic effects. The validity of these findings was confirmed through independent replication and cell-based functional assays. Exposures Cisplatin-based chemotherapy. Main Outcomes and Measures Cisplatin-induced ototoxic effects. Results After exclusions, 188 patients (median [interquartile range] age, 31 [24-39] years) were enrolled in this study to form the discovery and replication cohorts. Association and fine-mapping analyses identified a protein-coding variant, rs4788863 in SLC16A5, that was associated with protection against cisplatin-induced ototoxic effects in 2 independent cohorts (combined cohort: odds ratio, 0.06; 95% CI, 0.02-0.22; P = 2.17 × 10-7). Functional validation of this transporter gene revealed that in vitro SLC16A5-silencing altered cellular responses to cisplatin treatment, supporting a role for SLC16A5 in the development of cisplatin-induced ototoxic effects. These results were further supported by the literature, which provided confirmatory evidence for the role that SLC16A5 plays in hearing. Conclusions and Relevance This study has identified a novel association between protein-coding variation in SLC16A5 and cisplatin-induced ototoxic effects. These findings have provided insight into the molecular mechanisms of this adverse drug reaction in adult patients with germ cell testicular cancer. Given that previous studies have shown that cimetidine, an SLC16A5-inhibitor, prevents murine cisplatin-induced ototoxic effects, the findings from this study have important implications for otoprotectant strategies in humans.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Institute of Clinical Chemistry

UniBE Contributor:

Amstutz, Ursula

Subjects:

600 Technology > 610 Medicine & health

ISSN:

2374-2437

Publisher:

American Medical Association

Language:

English

Submitter:

Ursula Amstutz

Date Deposited:

13 Mar 2018 16:22

Last Modified:

13 Mar 2018 16:22

Publisher DOI:

10.1001/jamaoncol.2017.0502

PubMed ID:

28448657

BORIS DOI:

10.7892/boris.108840

URI:

https://boris.unibe.ch/id/eprint/108840

Actions (login required)

Edit item Edit item
Provide Feedback