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|Ref Type||Journal Article|
|Authors||Hellmann MD, Kim TW, Lee CB, Goh BC, Miller WH, Oh DY, Jamal R, Chee CE, Chow LQM, Gainor JF, Desai J, Solomon BJ, Das Thakur M, Pitcher B, Foster P, Hernandez G, Wongchenko MJ, Cha E, Bang YJ, Siu LL, Bendell J|
|Title||Phase Ib study of atezolizumab combined with cobimetinib in patients with solid tumors.|
|Journal||Annals of oncology : official journal of the European Society for Medical Oncology|
|Date||2019 07 01|
|Abstract Text||Preclinical evidence suggests that MEK inhibition promotes accumulation and survival of intratumoral tumor-specific T cells and can synergize with immune checkpoint inhibition. We investigated the safety and clinical activity of combining a MEK inhibitor, cobimetinib, and a programmed cell death 1 ligand 1 (PD-L1) inhibitor, atezolizumab, in patients with solid tumors.This phase I/Ib study treated PD-L1/PD-1-naive patients with solid tumors in a dose-escalation stage and then in multiple, indication-specific dose-expansion cohorts. In most patients, cobimetinib was dosed once daily orally for 21 days on, 7 days off. Atezolizumab was dosed at 800 mg intravenously every 2 weeks. The primary objectives were safety and tolerability. Secondary end points included objective response rate, progression-free survival, and overall survival.Between 27 December 2013 and 9 May 2016, 152 patients were enrolled. As of 4 September 2017, 150 patients received ≥1 dose of atezolizumab, including 14 in the dose-escalation cohorts and 136 in the dose-expansion cohorts. Patients had metastatic colorectal cancer (mCRC; n = 84), melanoma (n = 22), non-small-cell lung cancer (NSCLC; n = 28), and other solid tumors (n = 16). The most common all-grade treatment-related adverse events (AEs) were diarrhea (67%), rash (48%), and fatigue (40%), similar to those with single-agent cobimetinib and atezolizumab. One (<1%) treatment-related grade 5 AE occurred (sepsis). Forty-five (30%) and 23 patients (15%) had AEs that led to discontinuation of cobimetinib and atezolizumab, respectively. Confirmed responses were observed in 7 of 84 patients (8%) with mCRC (6 responders were microsatellite low/stable, 1 was microsatellite instable), 9 of 22 patients (41%) with melanoma, and 5 of 28 patients (18%) with NSCLC. Clinical activity was independent of KRAS/BRAF status across diseases.Atezolizumab plus cobimetinib had manageable safety and clinical activity irrespective of KRAS/BRAF status. Although potential synergistic activity was seen in mCRC, this was not confirmed in a subsequent phase III study.NCT01988896 (the investigators in the NCT01988896 study are listed in the supplementary Appendix, available at Annals of Oncology online).|
|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|
|Unknown unknown||lung non-small cell carcinoma||not applicable||Atezolizumab + Cobimetinib||Phase I||Actionable||In a Phase Ib trial, Tecentriq (atezolizumab) and Cotellic (cobimetinib) combination treatment demonstrated safety and preliminary clinical activity, resulted in a confirmed response in 18% (5/28) of patients with non-small cell lung cancer, regardless of KRAS/BRAF status (PMID: 30918950; NCT01988896).||30918950|
|Unknown unknown||melanoma||not applicable||Atezolizumab + Cobimetinib||Phase I||Actionable||In a Phase Ib trial, Tecentriq (atezolizumab) and Cotellic (cobimetinib) combination treatment demonstrated safety and preliminary clinical activity, resulted in a confirmed response in 41% (9/22) of patients with melanoma, regardless of KRAS/BRAF status (PMID: 30918950; NCT01988896).||30918950|
|Unknown unknown||colorectal cancer||no benefit||Atezolizumab + Cobimetinib||Phase I||Actionable||In a Phase Ib trial, Tecentriq (atezolizumab) and Cotellic (cobimetinib) combination treatment resulted in partial response in 7% (7/84) of patients with metastatic colorectal cancer, with a median duration of response of 14.8 months, a disease control rate of 31% (26/84), a median progression-free survival of 1.9 months, and a median overall survival of 10.0 months (PMID: 30918950; NCT01988896).||30918950|