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Bortezomib (B)

National Cancer Institute (NCI) · FDA-approved active Small molecule

Bortezomib inhibits the 26S proteasome, preventing the degradation of proteins that regulate cell cycle and apoptosis, leading to cancer cell death.

Bortezomib inhibits the 26S proteasome, preventing the degradation of proteins that regulate cell cycle and apoptosis, leading to cancer cell death. Used for Multiple myeloma (newly diagnosed and relapsed/refractory), Mantle cell lymphoma, Light chain myeloma.

At a glance

Generic nameBortezomib (B)
Also known asVelcade
SponsorNational Cancer Institute (NCI)
Drug classProteasome inhibitor
Target26S proteasome
ModalitySmall molecule
Therapeutic areaOncology
PhaseFDA-approved

Mechanism of action

Bortezomib is a reversible proteasome inhibitor that blocks the degradation of ubiquitinated proteins, causing accumulation of pro-apoptotic factors and cell cycle inhibitors. This leads to G2/M phase arrest and triggers apoptosis in cancer cells, particularly in multiple myeloma and mantle cell lymphoma. The drug is especially effective in hematologic malignancies where proteasome inhibition disrupts the balance of survival and death signals.

Approved indications

Common side effects

Key clinical trials

Primary sources

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SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results

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