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The relationship between tyrosine kinase inhibitor therapy and overall survival in patients with non-small cell lung cancer carrying EGFR mutations

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Chinese Journal of Cancer 2013年第3期32卷 136-140页

作者： Hidekazu Suzuki Tomonori Hirashima Norio Okamoto tadahiro yamadori Motohiro Tamiya Naoko Morishita Takayuki Shiroyama Tomoyuki Otsuka Kanako Kitai Ichiro Kawase Department of Thoracic Malignancy Osaka Prefectural Medical Center for Respiratory and Allergic Diseases 3-7-1 Habikino Habikino-shiOsaka 583-8588 Japan.

For patients with epidermal growth factor receptor (EGFR) mutation-positive lung cancer, the relationship between the dose or duration of treatment with tyrosine kinase inhibitor (TKI) and overall survival remains unclear. Here, we analyzed clinical data of 39 patients who were diagnosed with EGFR mutation-positive non-small cell lung cancer and treated with TKI, but subsequently died. Several parameters were measured in this study: overall survival; first, second, and overall TKI therapy durations; first TKI intensity (actual dose/normal dose); and TKI rate (overall TKI therapy duration/overall survival). The response rate to TKI therapy was 50% , and the median survival was 553 days. After TKI therapy failed, 38.5% patients were re-challenged with TKI. We observed a moderate relationship [r = 0.534, 95% confidential interval (CI) = 0.263 to 0.727, P < 0.001] between overall TKI therapy duration and overall survival. However, we found no relationship between overall survival and first TKI intensity (r = 0.073, 95% CI = -0.380 to 0.247, P = 0.657) or TKI rate (r = 0.0345, 95% CI = -0.284 to 0.346, P = 0.835). Nonsmall cell lung cancer patients with mutation-positive tumors remained on TKI therapy for, on average, 33% of the overall survival time. These findings suggest that patients with EGFR mutation-positive tumors should not stick to using TKIs.

关键词：酪氨酸激酶抑制剂非小细胞肺癌治疗剂量肿瘤患者 EGFR 生存期突变表皮生长因子受体

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