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The proteasome: a novel target for anticancer therapy

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Abstract

The proteasome is an ubiquituous enzyme complex that plays a critical role in the degradation of many proteins involved in cell cycle regulation, apoptosis and angiogenesis. Since these pathways are fundamental for cell survival and proliferation, particularly in cancer cells, the inhibition of proteasome is an attractive potential anticancer therapy. Bortezomib (Velcade, formerly PS-341) is an extremely potent and selective proteasome inhibitor that shows strong activity inin vitro andin vivo laboratory studies against many solid and hematologic tumor types. Moreover, bortezomib, mainly by inhibition of the NF-κB pathway, has a chemosensitizing effect when administered together with other antitumoral drugs. Clinical phase I trials, showed good tolerance of bortezomib at doses that achieved a desired degree of proteasome inhibition. Phase II studies showed high response rates in refractory multiple myeloma patients, which led to the accelerated approval of bortezomib by the Food and Drug Administration (FDA) and the European Medicines Agency (EMEA) for this indication. A phase III trial comparing bortezomib to dexamethasone in refractory/relapsed multiple myeloma patients had to be halted due to a survival advantage in the bortezomib arm. Additional studies are focusing in the potential benefit of bortezomib in newly diagnosed multiple myeloma patients. In other solid and hematological malignancies, phase II studies with bortezomib alone or in combination are ongoing with encouraging results, particularly in lung cancer and lymphoma.

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Authors and Affiliations

  1. Medical Oncology Department & Experimental Cancer Therapeutics Unit (URTEC), Hospital del Mar, Passeig Maritim, 25-29, 08005, Barcelona, Spain

    Clara Montagut, Ana Rovira & Joan Albanell

Authors
  1. Clara Montagut
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  2. Ana Rovira
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  3. Joan Albanell
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Corresponding author

Correspondence to Joan Albanell.

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Supported by an unrestricted educational grant from Pfizer.

This work was supported in part by Spanish Science and Technology Ministry (MCYT) SAF 2003/08181.

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Montagut, C., Rovira, A. & Albanell, J. The proteasome: a novel target for anticancer therapy. Clin Transl Oncol 8, 313–317 (2006). https://doi.org/10.1007/s12094-006-0176-8

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