Does afatinib plus bevacizumab combination therapy induce positive conversion of T790M in previously-negative patients?

Does afatinib plus bevacizumab combination therapy induce positive conversion of T790M in previously-negative patients? Oncotarget. 2018 Oct 05;9(78):34765-34771 Authors: Hata A, Katakami N, Kaji R, Yokoyama T, Kaneda T, Tamiya M, Inoue T, Kimura H, Yano Y, Tamura D, Morita S, Negoro S, HANSHIN Oncology Group Abstract Third-generation epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitors (TKIs) are markedly effective for T790M-positive patients. To confer their clinical benefit to more patients, a novel therapy to induce positive conversion in T790M-negative patients may be possible. We retrospectively reviewed medical records of patients who had received rebiopsy after completion of ABC-study: a prospective phase II study of Afatinib plus Bevacizumab Combination (ABC)-therapy after acquired resistance to EGFR-TKI. Between October 2014 and September 2016, 32 eligible patients were enrolled in ABC-study at our institutes. Eighteen patients were T790M-negative and 14 were T790M-positive before ABC-therapy. Rebiopsy was performed on 13 T790M-negative and 5 T790M-positive patients after progression of ABC-therapy. In 8 (62%) of 13 T790M-negative patients, T790M status changed from negative to positive after ABC-therapy. Seven of these 8 patients underwent osimertinib therapy. The response rate and median time to treatment failure were 86% and 12.2 months, respectively. There were no adverse events ≥grade 3, nor any treatme...
Source: Oncotarget - Category: Cancer & Oncology Tags: Oncotarget Source Type: research