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Ref Type | Journal Article | ||||||||||||
PMID | (28551618) | ||||||||||||
Authors | Gong J, Chen Y, Yang L, Pillai R, Shirasawa S, Fakih M | ||||||||||||
Title | MEK162 Enhances Antitumor Activity of 5-Fluorouracil and Trifluridine in KRAS-mutated Human Colorectal Cancer Cell Lines. | ||||||||||||
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Abstract Text | Preclinical evidence demonstrates that mitogen-activated protein kinase kinase (MEK)/extracellular signal-regulated kinase (ERK) pathway inhibition increases sensitivity to 5-fluorouracil (5-FU) in colorectal cancer (CRC) cell lines and xenografts. Here, we aimed to investigate how CRC cell sensitivity to this combination is correlated to Kirsten rat sarcoma (KRAS) and proto-oncogene B-rapidly accelerated fibrosarcoma (BRAF) mutation, that are common in CRC and often lead to resistance to chemotherapy.Wild-type and mutant KRAS/BRAF human CRC cell lines were treated with escalating doses of 5-FU or trifluridine with MEK162 (MEK1/2 inhibitor) for 72 h. Cell viability was assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and synergism expressed by the combination index was calculated using CalcuSyn.Evidence of synergistic antitumor activity was observed for the majority of human CRC cell lines treated with MEK162 plus 5-FU (4/6) or trifluridine (7/9). Synergism was greater in KRAS- or BRAF-mutant cell lines compared to wild-type KRAS/BRAF CRC cell lines.The combination of MEK inhibition and trifluridine is worthwhile advancing in clinical development, particularly for treatment-refractory KRAS- or BRAF-mutated metastatic CRC. |
Molecular Profile | Treatment Approach |
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Therapy Name | Drugs | Efficacy Evidence | Clinical Trials |
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Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
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BRAF V600E | colorectal cancer | sensitive | Binimetinib + Trifluridine-tipiracil hydrochloride | Preclinical - Cell culture | Actionable | In a preclinical study, the addition of Mektovi (binimetinib) enhanced the efficacy of Lonsurf (trifluridine/tipiracil hydrochloride) treatment and synergistically inhibited proliferation in colorectal cancer cells harboring BRAF V600E in culture (PMID: 28551618). | 28551618 |