h-R3联合放疗治疗局部晚期鼻咽癌的Ⅱ期临床研究

背景与目的:目前临床应用的抗表皮生长因子受体(epidermal growth factor receptor,EGFR)的单克隆抗体易产生人抗鼠抗体反应,影响治疗效果.本研究评估人源化的抗EGFR单克隆抗体h-R3联合放疗对局部晚期鼻咽癌的近、远期疗效及毒性反应.方法:将免疫组化证实有EGFR中、强度表达的Ⅲ～Ⅳb期(UICC 1997)鼻咽癌初诊患者随机分为单纯放疗组(单放组)和放疗联合h-R3组(联合组),两组的放疗剂量和技术基本相同,联合组在放疗期间每周一次静脉滴注h-R3 100 mg.用WHO标准评价两组的近期疗效,用Kaplan-Meier法估计两组的生存率.结果:本研究共纳入35例,单放组和联合组分别为17例和18例,其中联合组有1例于治疗中途退组.联合组于治疗结束时、治疗后5周及治疗后17周时的总CR率分别为72.2%、83.3%和83.3%,而单放组分别为35.3%、41.2%和47.1%(P＜0.05).中位随访时间31.9个月(4.2～40.7个月),单放组的3年局部区域控制率、无远处转移生存率分别为和总生存率93.8%、100%和88.2%,联合组分别为100%、88.2%和94.4%,两组间的差异无统计学意义(P＞0.05).联合组除1例出现Ⅱ级呕吐外,均无任何药物不良反应发生,两组的急性放射反应差异也无统计学意义(P＞0.05).结论:h-R3是一种安全性良好的药物,有助于增强局部晚期鼻咽癌的放射灭瘤效应,但对远期疗效似乎无明显影响.

Phase II clinical trial of h-R3 combined radiotherapy for locoregionally advanced nasopharyngeal carcinoma

BACKGROUND & OBJECTIVE: Anti-epidermal growth factor receptor (EGFR) monoclonal antibodies are easily to produce human anti-murine antibody response at present clinical use. This may influence therapeutic effect. This study was to evaluate the short-term and long-term efficacy and toxicity of the humanized anti-EGFR monoclonal antibody h-R3 in combination with radiotherapy for locoregionally advanced nasopharyngeal carcinoma (NPC). METHODS: Patients with newly diagnosed stage III-IVb (UICC 1997) NPC, who had moderate or strong EGFR expression, were randomized into radiotherapy alone group or radiotherapy combined h-R3 group. Similar dosage and technique of radiotherapy was administered in both groups. The combination group received weekly intravenous infusion of 100 mg h-R3 during radiotherapy. The short-term efficacy was evaluated according to WHO criteria. The survival was analyzed by Kaplan-Meier method. RESULTS: A total of 35 patients were enrolled, 17 in radiotherapy alone group and 18 in combination group. During treatment, only 1 patient withdrew from the combination group. The overall complete remission (CR) rates at the end of treatment, 5 and 17 weeks after treatment were significantly higher in combination group than in radiotherapy alone group (72.2% vs. 35.3%, 83.3% vs. 41.2%, and 83.3% vs. 47.1%, P<0.05). Median follow-up time was 31.9 months (range, 4.2-40.7 months). No significant differences in 3-year locoregional control, distant metastasis-free survival and overall survival rates between the 2 groups were found. Except for 1 patient suffered from grade 2 vomiting, no patient developed other adverse events in combination group. No significant differences in radiotherapy-related adverse events between the 2 groups were observed. CONCLUSIONS: h-R3 is a safe drug which may enhance the response of advanced NPC patients to radiotherapy. However, h-R3 seems not to significantly affect the long-term outcomes.