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Zhou H, Lu T, Guo Q, Chen Y, Chen M, Chen Y, Lin Y, Chen C, Ma L, Xu Y, Lin S, Pan J. Effects of oral maintenance chemotherapy and predictive value of circulating EBV DNA in metastatic nasopharyngeal carcinoma. Cancer Med 2020; 9:2732-2741. [PMID: 32090498 PMCID: PMC7163084 DOI: 10.1002/cam4.2926] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/07/2020] [Accepted: 02/02/2020] [Indexed: 12/15/2022] Open
Abstract
Background/Objectives Oral maintenance chemotherapy can effectively prolong overall survival (OS) in many types of metastatic cancer, but its role in metastatic nasopharyngeal carcinoma (mNPC) is unclear. In this study, the efficacy of oral maintenance chemotherapy in mNPC and the effectiveness of circulating tumor EBV‐DNA for screening patients were evaluated. Methods Between June 2016 and December 2017, 141 patients with mNPC who received platinum‐based systemic chemotherapy were included (median follow‐up time, 21 months). Patients were classified into two groups according to the administration of oral maintenance chemotherapy. Plasma samples were collected before, during, and after treatment for the measurement of circulating EBV DNA. Results The 2‐year OS was higher for patients who received maintenance chemotherapy than for patients without maintenance chemotherapy (78.9% vs 62.7%, P = .016). Patients with undetectable posttreatment EBV‐DNA after 4‐6 cycles of systemic chemotherapy (n = 73) had a higher 2‐year OS than that of patients with detectable EBV‐DNA (n = 68) (82.16% vs 51.45%, P = .001). For patients with undetectable posttreatment EBV‐DNA, OS was better for those with maintenance chemotherapy than for those without (86.7% vs 73%, P = .027). For patients with detectable posttreatment EBV‐DNA, maintenance chemotherapy did not improve outcomes (49.5% vs 55.4%, P = .824). The most common acute events were hematological toxicity, and all were tolerable and curable. Conclusions Oral maintenance chemotherapy with S1 or capecitabine can improve OS in mNPC. Posttreatment EBV‐DNA was not only an independent prognosis factor for mNPC but also can screen out beneficiaries of maintenance chemotherapy.
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Affiliation(s)
- Han Zhou
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Tianzhu Lu
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China.,Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou, China
| | - Qiaojuan Guo
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China.,Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou, China
| | - Yan Chen
- Laboratory of Biochemistry and Molecular Biology Research, Fujian Cancer Hospital, Fuzhou, China.,Department of Clinical Laboratory, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Mengwei Chen
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Yansong Chen
- Laboratory of Biochemistry and Molecular Biology Research, Fujian Cancer Hospital, Fuzhou, China.,Department of Clinical Laboratory, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Yingying Lin
- Laboratory of Biochemistry and Molecular Biology Research, Fujian Cancer Hospital, Fuzhou, China.,Department of Clinical Laboratory, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Chuanben Chen
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Liqin Ma
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Yun Xu
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Shaojun Lin
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China.,Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou, China
| | - Jianji Pan
- Department of Radiation Oncology, Fujian Cancer Hospital &, Fujian Medical University Cancer Hospital, Fuzhou, China.,Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou, China
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