Volume 17, Issue 1 pp. 76-89

Vincristine and bortezomib cause axon outgrowth and behavioral defects in larval zebrafish

Tahsin M. Khan

Tahsin M. Khan

Department of Biology, Williams College, Williamstown, MA, USA

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Nathan Benaich

Nathan Benaich

Department of Biology, Williams College, Williamstown, MA, USA

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Clare F. Malone

Clare F. Malone

Department of Biology, Williams College, Williamstown, MA, USA

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Rebecca L. Bernardos

Rebecca L. Bernardos

Department of Biology, Smith College, Northampton, MA, USA

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Amy R. Russell

Amy R. Russell

Department of Biology, Williams College, Williamstown, MA, USA

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Gerald B. Downes

Gerald B. Downes

Department of Biology, University of Massachusetts, Amherst, MA, USA

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Michael J. Barresi

Michael J. Barresi

Department of Biology, Smith College, Northampton, MA, USA

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Lara D. Hutson

Corresponding Author

Lara D. Hutson

Department of Biology, Williams College, Williamstown, MA, USA

Program in Neuroscience, Williams College, Williamstown, MA, USA

Lara D. Hutson, Department of Biological Sciences, 109 Cooke Hall, University at Buffalo, State University of New York, Buffalo, NY 14260, USA. Tel: +1 716-645-4958; Fax: +1 716-645-2975; E-mail: [email protected]Search for more papers by this author
First published: 28 March 2012
Citations: 13

Abstract

Peripheral neuropathy is a common side effect of a number of pharmaceutical compounds, including several chemotherapy drugs. Among these are vincristine sulfate, a mitotic inhibitor used to treat a variety of leukemias, lymphomas, and other cancers, and bortezomib, a 26S proteasome inhibitor used primarily to treat relapsed multiple myeloma and mantle cell lymphoma. To gain insight into the mechanisms by which these compounds act, we tested their effects in zebrafish. Vincristine or bortezomib given during late embryonic development caused significant defects at both behavioral and cellular levels. Intriguingly, the effects of the two drugs appear to be distinct. Vincristine causes uncoordinated swimming behavior, which is coupled with a reduction in the density of sensory innervation and overall size of motor axon arbors. Bortezomib, in contrast, increases the duration and amplitude of muscle contractions associated with escape swimming, which is coupled with a preferential reduction in fine processes and branches of sensory and motor axons. These results demonstrate that zebrafish is a convenient in vivo assay system for screening potential pharmaceutical compounds for neurotoxic side effects, and they provide an important step toward understanding how vincristine and bortezomib cause peripheral neuropathy.

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