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PR-924 is a novel prototypic immunoproteasome inhibitor bearing markedly enhanced specificity for the β5i immunoproteasome subunit, compared to the classical proteasome inhibitor bortezomib. Here, we assessed the growth inhibitory potential of PR-924 in three human hematologic malignancy cell lines (CCRF-CEM, THP1, and 8226) and their bortezomib-resistant sublines. Parental cells displayed equal sensitivity...
The proteasome inhibitor bortezomib, registered for Multiple Myeloma treatment, is currently explored for activity in solid tumors including non-small cell lung cancer (NSCLC). Here we studied the proteasome-based mechanisms underlying intrinsic and acquired bortezomib resistance in NSCLC cells. Various NSCLC cell lines displayed differential intrinsic sensitivities to bortezomib. High basal chymotrypsin-...
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