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- W4361947013 abstract "<div>AbstractPurpose:<p>Cyclin and MAPK/MEK-related gene alterations are implicated in cell-cycle progression and cancer growth. Yet, monotherapy to target the cyclin (CDK4/6) or the MEK pathway has often yielded disappointing results. Because coalterations in cyclin and MEK pathway genes frequently cooccur, we hypothesized that resistance to CDK4/6 or MEK inhibitor monotherapy might be mediated via activation of oncogenic codrivers, and that combination therapy might be useful.</p>Experimental Design:<p>Herein, we describe 9 patients with advanced malignancies harboring concomitant <i>CDKN2A</i> and/or <i>CDKN2B</i> alterations (upregulate CDK4/6) along with <i>KRAS</i> or <i>BRAF</i> alterations (activate the MEK pathway) who were treated with palbociclib (CDK4/6 inhibitor) and trametinib (MEK inhibitor) combination-based regimens.</p>Results:<p>Two patients (with pancreatic cancer) achieved a partial remission (PR) and, overall, 5 patients (56%) had clinical benefit (stable disease ≥ 6 months/PR) with progression-free survival of approximately 7, 9, 9, 11, and 17.5+ months. Interestingly, 1 of these patients whose cancer (gastrointestinal stromal tumor) had progressed on MEK targeting regimen, did well for about 1 year after palbociclib was added.</p>Conclusions:<p>These observations suggest that cotargeting cyclin and MEK signaling can be successful when tumors bear genomic coalterations that activate both of these pathways. Further prospective studies using this matching precision strategy to overcome resistance are warranted.</p><p><i>See related commentary by Groisberg and Subbiah, p. 2672</i></p></div>" @default.
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- W4361947013 date "2023-03-31" @default.
- W4361947013 modified "2023-09-25" @default.
- W4361947013 title "Data from Concomitant MEK and Cyclin Gene Alterations: Implications for Response to Targeted Therapeutics" @default.
- W4361947013 doi "https://doi.org/10.1158/1078-0432.c.6529977" @default.
- W4361947013 hasPublicationYear "2023" @default.
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