Therapy Detail

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Therapy Name Palbociclib + Trametinib
Synonyms
Therapy Description

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Drug Name Trade Name Synonyms Drug Classes Drug Description
Palbociclib Ibrance PD0332991 CDK4/6 Inhibitor 9 Ibrance (palbociclib) is a selective inhibitor of cyclin-dependent kinase 4 (CDK4) and 6 (CDK6) (PMID: 19874578). Ibrance (palbociclib) is approved in combination with an aromatase inhibitor in postmenopausal patients with ER-positive, ERBB2 (HER2)-negative metastatic breast cancer, and in combination with Faslodex (fulvestrant) in patients with ER-positive, ERBB2 (HER2)-negative metastatic breast cancer (FDA.gov).
Trametinib Mekinist GSK1120212 MEK inhibitor (Pan) 22 MEK1 Inhibitor 20 MEK2 Inhibitor 18 Mekinist (trametinib) inhibits MEK 1 and 2, which potentially leads to reduced tumor cell proliferation (PMID: 27956260). Mekinist (trametinib) is FDA approved for melanoma patients harboring BRAF V600E or BRAF V600K mutations, and in combination with Tafinlar (dabrafinib) for BRAF V600E/K-mutant melanoma, BRAF V600E- mutant non-small cell lung cancer, and BRAF V600E-mutant anaplastic thyroid cancer (FDA.gov).

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
CDKN2A loss NRAS Q61K melanoma sensitive Palbociclib + Trametinib Preclinical - Cell line xenograft Actionable In a preclinical study, the combination of Ibrance (palbociclib) and Mekinist (trametinib) induced tumor regression in a mouse melanoma model expressing NRAS Q61K and harboring CDKN2A loss (PMID: 22983396). 22983396
BRAF wild-type melanoma decreased response Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, a BRAF wild-type melanoma cell line demonstrated minimal sensitivity when treated with the combination of Ibrance (palbociclib) and Mekinist (trametinib) in culture (PMID: 27488531). 27488531
NRAS Q61K NRAS mut melanoma predicted - resistant Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, NRAS-mutant melanoma cells expressing NRAS Q61K demonstrated resistance to the combination treatment of Mekinist (trametinib) and Ibrance (palbociclib) in culture (PMID: 30819666). 30819666
BRAF mutant melanoma sensitive Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, a melanoma cell line harboring a BRAF mutation demonstrated greater sensitivity to the combination treatment of Mekinist (trametinib) and Ibrance (palbociclib) in culture when compared to either agent alone (PMID: 27488531). 27488531
BRAF mut RB1 loss melanoma decreased response Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, a melanoma cell line with a BRAF mutation and loss of RB1 demonstrated minimal sensitivity when treated with the combination of Ibrance (palbociclib) and Mekinist (trametinib) in culture (PMID: 27488531). 27488531
NRAS wild-type melanoma decreased response Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, an NRAS wild-type melanoma cell line demonstrated minimal sensitivity when treated with the combination of Ibrance (palbociclib) and Mekinist (trametinib) in culture (PMID: 27488531). 27488531
NRAS Q61L NRAS mut melanoma predicted - resistant Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, NRAS-mutant melanoma cells expressing NRAS Q61L demonstrated resistance to the combination treatment with Mekinist (trametinib) and Ibrance (palbociclib) in culture (PMID: 30819666). 30819666
AKT1 pos NRAS mut melanoma predicted - resistant Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, two of four NRAS-mutant melanoma cell lines expressing AKT1 were resistant to the combination treatment of Ibrance (palbociclib) and Mekinist (trametinib) in culture (PMID: 30819666). 30819666
NRAS mutant melanoma predicted - sensitive Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, melanoma cell lines harboring an NRAS mutation were sensitive to the combination therapy of Ibrance (palbociclib) and Mekinist (trametinib) in culture, demonstrating reduced cell viability, colony formation, and pathway activity, and increased cell cycle arrest (PMID: 30819666). 30819666
NRAS mut PIK3CA E545K melanoma predicted - resistant Palbociclib + Trametinib Preclinical - Cell culture Actionable In a preclinical study, four of four NRAS-mutant melanoma cell lines expressing PIK3CA E545K were resistant to the combination treatment of Ibrance (palbociclib) and Mekinist (trametinib) in culture (PMID: 30819666). 30819666

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Clinical Trial Phase Therapies Title Recruitment Status
NCT02065063 Phase I Palbociclib + Trametinib A Study to Investigate the Safety, Pharmacokinetics, Pharmacodynamics, and Anti-Cancer Activity of Trametinib in Combination With Palbociclib in Subjects With Solid Tumors Completed


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