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Oxaliplatin-induced neurotoxicity is dependent on the organic cation transporter OCT2.


ABSTRACT: Oxaliplatin is an integral component of colorectal cancer therapy, but its clinical use is associated with a dose-limiting peripheral neurotoxicity. We found that the organic cation transporter 2 (OCT2) is expressed on dorsal root ganglia cells within the nervous system where oxaliplatin is known to accumulate. Cellular uptake of oxaliplatin was increased by 16- to 35-fold in cells overexpressing mouse Oct2 or human OCT2, and this process was associated with increased DNA platination and oxaliplatin-induced cytotoxicity. Furthermore, genetic or pharmacologic knockout of Oct2 protected mice from hypersensitivity to cold or mechanical-induced allodynia, which are established tests to assess acute oxaliplatin-induced neurotoxicity. These findings provide a rationale for the development of targeted approaches to mitigate this debilitating toxicity.

SUBMITTER: Sprowl JA 

PROVIDER: S-EPMC3704038 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature

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Oxaliplatin-induced neurotoxicity is dependent on the organic cation transporter OCT2.

Sprowl Jason A JA   Ciarimboli Giuliano G   Lancaster Cynthia S CS   Giovinazzo Hugh H   Gibson Alice A AA   Du Guoqing G   Janke Laura J LJ   Cavaletti Guido G   Shields Anthony F AF   Sparreboom Alex A  

Proceedings of the National Academy of Sciences of the United States of America 20130617 27


Oxaliplatin is an integral component of colorectal cancer therapy, but its clinical use is associated with a dose-limiting peripheral neurotoxicity. We found that the organic cation transporter 2 (OCT2) is expressed on dorsal root ganglia cells within the nervous system where oxaliplatin is known to accumulate. Cellular uptake of oxaliplatin was increased by 16- to 35-fold in cells overexpressing mouse Oct2 or human OCT2, and this process was associated with increased DNA platination and oxalipl  ...[more]

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