PMID- 27409420 OWN - NLM STAT- MEDLINE DCOM- 20180122 LR - 20220311 IS - 1949-2553 (Electronic) IS - 1949-2553 (Linking) VI - 7 IP - 31 DP - 2016 Aug 2 TI - Efficacy of trastuzumab beyond progression in HER2 positive advanced gastric cancer: a multicenter prospective observational cohort study. PG - 50656-50665 LID - 10.18632/oncotarget.10456 [doi] AB - INTRODUCTION: Trastuzumab plus chemotherapy is the standard first-line regimen in HER2 positive advanced gastric cancer (AGC), but lack of data in post-progression treatment. So, it is worth evaluating the efficacy of continuing trastuzumab after failure of the first-line trastuzumab based treatment. METHODS: 59 patients were enrolled from Zhongshan Hospital Fudan University, Sun Yat-sen University Cancer Center and Peking University Cancer Hospital between September 2012 and Oct 2015. Patients were divided into two groups according to the second line regimens: with or without trastuzumab. The primary endpoint was progression free survival of second line therapy (PFS2). Secondary end points included overall survival (OS), response rate, and adverse events (AEs). RESULTS: Baseline factors were well balanced between two groups. 32 patients treated with trastuzumab plus second line chemotherapy (group A) and 27 patients received chemotherapy alone (group B). The median follow-up time was 7.60 months (range 1.50-32.50). Longer median PFS2 was observed in group A than in group B (3.1 vs 2.0 months, P=0.008). There was no significant differences of median OS2 calculating from the second line therapy (10.5 vs 6.5 months, P=0.172) between two groups. Response rate was 9.3% in group A compared with 3.7% in group B (P=0.617). AEs were similar in two groups including cardiac safety. Subgroup analysis showed that factors of male, age<65, good performance status, HER2 immunohistochemical (IHC) 2+ and poor response to first line indicated superior PFS2 in patients continuing trastuzumab to those treated with chemotherapy alone. CONCLUSION: Continuing treatment of trastuzumab beyond first line therapy progression showed effective and safe in AGC. FAU - Li, Qian AU - Li Q AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Jiang, Huiqin AU - Jiang H AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Li, Hong AU - Li H AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Xu, Ruihua AU - Xu R AD - Department of Medical Oncology, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China, Guangzhou, China. FAU - Shen, Lin AU - Shen L AD - Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China. FAU - Yu, Yiyi AU - Yu Y AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Wang, Yan AU - Wang Y AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Cui, Yuehong AU - Cui Y AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Li, Wei AU - Li W AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Yu, Shan AU - Yu S AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Liu, Tianshu AU - Liu T AD - Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China. LA - eng PT - Journal Article PT - Multicenter Study PT - Observational Study PL - United States TA - Oncotarget JT - Oncotarget JID - 101532965 RN - 0 (Antineoplastic Agents) RN - EC 2.7.10.1 (ERBB2 protein, human) RN - EC 2.7.10.1 (Receptor, ErbB-2) RN - P188ANX8CK (Trastuzumab) SB - IM MH - Aged MH - Antineoplastic Agents/administration & dosage MH - Antineoplastic Combined Chemotherapy Protocols/*therapeutic use MH - Disease Progression MH - Disease-Free Survival MH - Female MH - Follow-Up Studies MH - Humans MH - Kaplan-Meier Estimate MH - Male MH - Middle Aged MH - Prognosis MH - Prospective Studies MH - Receptor, ErbB-2/*metabolism MH - Stomach Neoplasms/*drug therapy/metabolism MH - Trastuzumab/*administration & dosage MH - Treatment Outcome PMC - PMC5226611 OTO - NOTNLM OT - HER2 OT - advanced gastric cancer OT - trastuzumab OT - treatment beyond progression COIS- All authors declared that they have no conflicts of interest to this work. EDAT- 2016/07/14 06:00 MHDA- 2018/01/23 06:00 PMCR- 2016/08/02 CRDT- 2016/07/14 06:00 PHST- 2016/03/18 00:00 [received] PHST- 2016/04/28 00:00 [accepted] PHST- 2016/07/14 06:00 [pubmed] PHST- 2018/01/23 06:00 [medline] PHST- 2016/07/14 06:00 [entrez] PHST- 2016/08/02 00:00 [pmc-release] AID - 10456 [pii] AID - 10.18632/oncotarget.10456 [doi] PST - ppublish SO - Oncotarget. 2016 Aug 2;7(31):50656-50665. doi: 10.18632/oncotarget.10456.