NCIt definition : A purine-based heat shock protein 90 (Hsp90) inhibitor with potential antineoplastic
activity. Zelavespib specifically inhibits active Hsp90, thereby inhibiting its chaperone
function and promoting the proteasomal degradation of oncogenic signaling proteins
involved in tumor cell proliferation and survival. This may result in the inhibition
of cellular proliferation in susceptible tumor cell populations. Hsp90, a molecular
chaperone protein, is upregulated in a variety of tumor cell types.;