该研究自2019年8月7日至2020年3月18日共入组20例既往接受过至少二线多药化疗高危型化疗耐药或复发的妊娠滋养细胞肿瘤患者,其中19例为绒毛膜癌,1例为胎盘部位滋养细胞肿瘤患者。采用卡瑞利珠单抗(200 mg,每2周一次)联合阿帕替尼(250 mg,每日一次)治疗,直至肿瘤进展或不可耐受毒性。主要终点为根据血清人绒毛膜促性腺激素(hCG)水平评估的客观缓解率(ORR)。研究显示,ORR为55% (95% CI 32%–77%),10例(50%;95% CI 27%–73%)患者达到完全缓解,1例(5%)为部分缓解。中位随访时间为18.5个月(IQR 14.6–20.9),中位无进展生存期(PFS)为9.5个月。中位总生存期(OS)未达到,12个月OS率为90%。

妊娠滋养细胞肿瘤是由胎盘滋养细胞异常增殖引起的,包括绒毛膜癌、胎盘部位滋养细胞肿瘤和上皮样滋养细胞瘤3。国际妇产科联盟(FIGO)于2000年审定并通过的预后评分标准将妊娠滋养细胞肿瘤患者分为低危型(FIGO评分<7)和高危型(FIGO评分≥7)4。低危型妊娠滋养细胞肿瘤患者多采用单药化疗,高危型患者多采用多药化疗方案3、5。尽管超过90%的高危型患者可通过初次治疗(如EMA/CO[依托泊苷、甲氨蝶呤和放线菌素D/环磷酰胺和长春新碱]、EMA/EP[依托泊苷、甲氨蝶呤和放线菌素D/依托泊苷和顺铂]和FAEV [氟脲苷、放线菌素D、依托泊苷和长春新碱]3、5、6)获得完全缓解,但仍有约5%的高危型患者发展为化疗耐药或多次复发并因疾病进展死亡6-8。对于高危型化疗耐药或复发的妊娠滋养细胞肿瘤患者急需探索新的治疗方法,特别是对那些经过多线化疗失败可能面临无药可用的患者。免疫治疗的应用或许能为此类患者带来新的希望!
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资料参考:恒瑞官微





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