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|Ref Type||Journal Article|
|Title||Molecular pathways: CDK4 inhibitors for cancer therapy.|
|Journal||Clinical cancer research : an official journal of the American Association for|
|Date||2014 Jul 1|
|Abstract Text||Unrestrained growth is the hallmark of cancer, and disrupted cell-cycle regulation is, therefore, common. CDK4 is the key regulator of the G1-S transition. In complex with cyclin D, CDK4 phosphorylates retinoblastoma protein (Rb) and drives cell-cycle progression, a process inhibited by p16. The p16-CDK4-cyclin D-Rb is aberrant in the majority of cancers and is, thus, a logical target for anticancer therapy. Previous attempts to block CDK4 with nonselective cyclin-dependent kinase (CDK) inhibitors led to toxicity and little efficacy. However, the recent development of selective CDK4 inhibitors launched the first successful efforts to target the pathway for cancer therapy. Three oral selective CDK4 inhibitors have entered clinical trials: palbociclib (PD0332991), LEE011, and LY2835219. CDK4 inhibitors have in vitro activity against a broad range of cancers and in patients have shown antitumor activity in breast cancer, lymphoma, sarcoma, and other tumors. Major efforts are under way to develop biomarkers of response, understand potential mechanisms of resistance, and develop rational combinations of CDK4 inhibitors with chemotherapy and other targeted drugs.|
|Molecular Profile||Treatment Approach|
|Gene Name||Source||Synonyms||Protein Domains||Gene Description||Gene Role|
|Therapy Name||Drugs||Efficacy Evidence||Clinical Trials|
|Drug Name||Trade Name||Synonyms||Drug Classes||Drug Description|
|Gene||Variant||Impact||Protein Effect||Variant Description||Associated with drug Resistance|
|Molecular Profile||Indication/Tumor Type||Response Type||Therapy Name||Approval Status||Evidence Type||Efficacy Evidence||References|
|RB1 positive||Advanced Solid Tumor||predicted - sensitive||Ribociclib||Phase I||Actionable||In a Phase I clinical trial, Kisqali (ribociclib) demonstrated safety and preliminary efficacy in patients with RB1-positive solid tumors and lymphomas, resulting in partial responses in 2.3% (3/132) of patients and stable disease in 32.6% (41/132) of patients, including 8 patients demonstrating stable disease for greater than 6 months (PMID: 27542767, PMID: 24795392).||detail... 24795392 27542767|