综述
非小细胞肺癌治疗年度进展2022
中华医学杂志, 2023,103(14) : 1074-1081. DOI: 10.3760/cma.j.cn112137-20221212-02628
摘要

本文回顾了国内外非小细胞肺癌(NSCLC)治疗领域在2022年度的临床进展。在NSCLC的新辅助治疗中,应用纳武利尤单抗联合化疗与单纯化疗相比,显著延长了可切除ⅠB~ⅢA期NSCLC患者的无事件生存期。同时奥希替尼在表皮生长因子受体(EGFR)敏感突变阳性(EGFRm)Ⅱ~ⅢB期的患者的新辅助治疗的客观缓解率(ORR)显著改善。在不可切除的NSCLC晚期患者中,三代间变性淋巴瘤激酶(ALK)抑制剂劳拉替尼及三代靶向EGFR的国产药物贝福替尼及阿美替尼可有效延长患者无进展生存期(PFS)。少见突变的靶向药物取得了一定的突破与进展。同时抗体偶联药物(ADC)进展迅速,目前靶向人表皮生长因子受体-2(HER-2)的 ADC药物的临床研究正在积极探索中。国内肿瘤新药研发日新月异,靶向治疗及免疫治疗在可切除的NSCLC的新辅助治疗,术后维持治疗中的更多适应证也在积极探究,并取得了相当的疗效和安全性。而对于一线使用免疫及靶向治疗后疾病进展的晚期NSCLC患者,后线治疗中仍需要新的组合和策略探索。

引用本文: 杨莹, 李子明, 朱可喻, 等.  非小细胞肺癌治疗年度进展2022 [J] . 中华医学杂志, 2023, 103(14) : 1074-1081. DOI: 10.3760/cma.j.cn112137-20221212-02628.
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肺癌是世界范围内肿瘤中最常见的死亡原因。肺腺癌(lung adenocarcinoma,LUAD)和肺鳞状细胞癌(lung squamous cell carcinoma,LUSC)是最常见的肺癌亚型,占比约85%。免疫治疗及靶向治疗的新模式改变了可切除非小细胞肺癌(non-small cell lung cancer,NSCLC)的治疗策略1。基于CheckMate 816(NCT02998528)研究结果,纳武利尤单抗+含铂双药化疗被美国食品药品监督管理局(Food and Drug Administration,FDA)批准用于可切除NSCLC的新辅助治疗。阿替利珠单抗也被批准用于细胞程序性死亡配体1(programmed cell death 1 ligand 1,PD-L1)阳性[肿瘤细胞(tumor cell,TC)≥1%]、经手术切除、以铂类为基础化疗之后的Ⅱ~ⅢA期NSCLC患者。在不可切除NSCLC中,靶向人表皮生长因子受体-2(human epidermal growthfactor receptor 2,HER-2)的抗体偶联药物(antibody-drug conjugates,ADC)等药物的出现更革新了肺癌的治疗模式。

一、可切除NSCLC的治疗进展

传统治疗中,放化疗在NSCLC的新辅助治疗中占据主要地位。目前免疫联合化疗、靶向治疗作为新辅助治疗的探索模式取得积极结果。

(一)新辅助治疗

1.新辅助免疫治疗联合放化疗:Ⅲ期临床研究CheckMate 816(NCT02998528)的最新数据在2022美国癌症研究协会(AACR)年会中公布:在可切除ⅠB~ⅢA期NSCLC患者的新辅助治疗中,应用纳武利尤单抗+化疗与单纯化疗相比,显著延长了患者的无事件生存期(31.6比20.8个月,OR=0.63,97.38%CI:0.43~0.91),并提高了病理完全缓解(pathologic complete response,pCR)率(24%比2%,99%CI:3.49%~55.75%,P<0.001),同时未降低手术可行性,目前两组均未达到中位总生存期(median overall survival,mOS)2。基于CheckMate 816的研究结果,纳武利尤单抗+含铂双药化疗2022年3月4日被美国FDA批准用于可切除NSCLC的新辅助治疗。

在可切除的ⅢA~ⅢB期NSCLC的新辅助治疗中(NADIM Ⅱ,NCT03838159),与单一化疗相比,纳武利尤单抗联合化疗可显著提高患者pCR率(36.8%比6.9%,OR=7.88,95%CI:1.70%~36.51%,P=0.007)3。另外一项单臂评估新辅助放化疗联合伊匹木单抗及纳武利尤单抗的Ⅱ期的INCREASE研究(NCT04013542),入组T3-4N0-2M0的NSCLC患者,pCR率达到63%(15/24),远超过传统同步放化疗的pCR率(30%),提示放化疗联合双免序贯手术的新辅助策略或可提高病理缓解,从而改善患者生存期4

国产药物在新辅助治疗领域的探索也取得积极进展。一项纳入ⅢA~ⅢB期 NSCLC 患者的回顾性研究提示,替雷利珠单抗联合含铂双药化疗作为新辅助治疗,可获得较高的主要病理缓解率(major pathologic response,MPR)、pCR率和可管理的安全性5;Ⅱ期单臂研究纳入ⅡB~ⅢB期的可切除NSCLC患者进行新辅助治疗,证实特瑞普利单抗联合含铂双药是一种有潜力的、可耐受的治疗方法6。这些研究结果显示以程序性细胞死亡受体-1(programmed death receptor-1,PD-1)/PD-L1 单抗为基础的新辅助治疗具有较好的应用前景,但尚需总生存数据的支持。

2.靶向治疗:在表皮生长因子受体(epidermal growth factor receptor,EGFR)敏感突变阳性的Ⅱ~ⅢB期(T3-4N2M0)LUAD患者中,Ⅱ期单臂NEOS研究(ChiCTR 1800016948)证实奥希替尼作为新辅助治疗的客观缓解率(objective response rate,ORR)达71.1%,疾病控制率(disease control rate,DCR)达到100%,R0切除率达94%,46%的患者病理缓解≥50%,安全性与既往奥希替尼研究结果一致7。目前在Ⅱ~ⅢB(N2)期EGFRm NSCLC的新辅助治疗中,比较奥希替尼单药或联合化疗与单独标准化疗的Ⅲ期临床研究NeoADAURA(NCT04351555)正在开展;未来奥希替尼有机会成为可切除EGFRm NSCLC患者的新辅助治疗选择8

(二)术后辅助治疗

1.免疫治疗:基于Ⅲ期Impower010的研究(NCT02486718)数据,FDA和中国国家药品监督管理局(National Medical Products Administration,NMPA)均批准了阿替利珠单抗用于PD-L1阳性(TC≥1%)、经手术切除、以铂类为基础化疗之后的Ⅱ~ⅢA期NSCLC患者术后辅助治疗的适应症9。2022年世界肺癌大会(WCLC)上更新的IMpower010研究数据表明,中位随访时间为45.3个月,在PD-L1 TC≥1%的Ⅱ~ⅢA期NSCLC患者中,与最佳支持治疗(best supportive care,BSC)相比,阿替利珠单抗辅助免疫治疗OS有潜在获益趋势(HR=0.71,95%CI:0.49~1.03);在PD-L1 TC≥50%人群中OS改善更为突出(HR=0.42,95%CI:0.23~0.78)10。2022年欧洲肿瘤内科学会年会(ESMO)公布了Ⅲ期临床研究PEARLS/KEYNOTE-091(NCT02504372)的最新数据:在ⅠB~ⅢA期NSCLC患者的术后辅助治疗中,帕博利珠单抗对比安慰剂组治疗总人群的无病生存期(disease free survival,DFS)为53.6比42.0 个月(HR=0.76,95%CI:0.63~0.91,P=0.001),PD-L1高表达组差异无统计意义11

2.靶向治疗:基于ADAURA研究(NCT02511106),奥希替尼已被NMPA获批用于ⅠB~ⅢA期EGFRm NSCLC完全切除术后的辅助治疗12。2022年ESMO更新的ADAURA研究数据显示:全体人群(ⅠB~ⅢA期NSCLC患者)中,与安慰剂组相比,奥希替尼组DFS的HR(95%CI)值为0.27(0.21~0.34);其中Ⅱ~ⅡA期的NSCLC患者中,与安慰剂组相比,奥希替尼组HR(95%CI)为0.23(0.18~0.30)13。中国人群的疗效和安全性与全球数据一致14

二、不可切除的局部晚期NSCLC治疗进展

放化疗后巩固治疗一直是不可切除局部晚期NSCLC的研究热点,在不可切除的Ⅲ期肺癌患者中,同步放化疗(concurrent chemotherapy and radiotherapy,cCRT)后,与纳武利尤单抗单药治疗相比,纳武利尤单抗+伊匹木单抗治疗显著改善了患者的18个月无进展生存期(progression-free survival,PFS)率,但联合治疗导致肺炎和总体毒性的发生率更高15。对于不能耐受cCRT的患者,序贯放化疗(sequential chemoradiotherapy,sCRT)后使用度伐利尤单抗也是合理的治疗策略。Ⅱ期PACIFIC-6研究(NCT03693300)提出sCRT 后接受2年度伐利尤单抗巩固治疗安全性可控,中位PFS(mPFS)达到10.9(7.3~15.6)个月,12个月PFS率达到49.6%(39.5%~58.9%),在PD-L1高表达组具有更好的获益趋势16

但免疫疗法是否能使EGFRm的Ⅲ期NSCLC患者获益仍不清楚17。研究者在2022美国临床肿瘤学会(American Society of Clinical Oncology,ASCO)大会中分析了PACIFIC研究中35例EGFRm患者的结果,发现度伐利尤单抗与安慰剂组PFS及OS差异无统计学意义18。对于Ⅲ期EGFRm NSCLC患者中,cCRT后使用奥希替尼的新模式正在研究中19

在国产药物领域,Ⅲ期GEMSTONE-301研究(NCT03728556)纳入既往接受sCRT及cCRT的Ⅲ期不可手术的NSCLC患者,显示舒格利单抗(PD-L1抑制剂)对比安慰剂作为巩固治疗的PFS分别为10.5比6.2 个月(HR=0.65,95%CI:0.50~0.84),获益趋势与PACIFIC研究结果相似20。目前舒格利单抗在中国已经获批用于Ⅲ期不可切除NSCLC患者的治疗21

三、晚期肺癌的治疗进展
(一)靶向治疗

靶向治疗是肺癌治疗历史上的突破性进展,极大地改善了患者的预后。目前建议对所有新诊断的晚期LUAD患者进行EGFRm、间变性淋巴瘤激酶(anaplastic lymphoma kinase,ALK)和C-ros肉瘤致癌因子-受体酪氨酸激酶(ROS proto-oncogene 1,receptor tyrosine kinase,ROS1)重排以及鼠类肉瘤病毒癌基因同源物B1(v-raf murine sar-coma viral oncogene homolog B1,BRAF)V600E突变的分子检测22, 23。除此之外,还有越来越多的经批准的相关靶点的靶向治疗,包括Kirsten大鼠肉瘤病毒癌基因同源物(Kirsten rats arcomaviral oncogene homolog,KRAS)G12C突变、间质-上皮细胞转化因子(mesenchymal-epithelial transition factor,MET)外显子14跳跃突变、神经营养酪氨酸受体激酶(neurotrophin receptor kinase,NTRK)重排和转导重排基因(rearranged during transfection,RET)重排。

1.EGFRm患者的靶向治疗:EGFR 酪氨酸激酶抑制剂(tyrosine kinase inhibitor,TKI)为晚期EGFRm NSCLC患者的一线治疗选择。我国一项多中心随机对照的Ⅲ期研究结果显示,在EGFRm的ⅢB~Ⅳ期NSCLC患者的一线治疗中,三代EGFR TKI贝福替尼组对比埃克替尼(NCT03861156)的mPFS为22.1比13.8个月(HR=0.49,95%CI:0.36~0.68,P<0.001),表明贝福替尼可作为中国EGFRm的不可切除NSCLC患者的有效一线治疗选择24, 25。阿美替尼作为国产第三代EGFR TKI,其PFS在总研究人群以及各个亚组中均优于吉非替尼,可作为EGFRm、晚期NSCLC的一线治疗选择26。三代EGFR TKI国产伏美替尼组一线治疗EGFRm NSCLC的mPFS明显长于吉非替尼组(20.8比11.1个月,HR=0.44,95%CI:0.34~0.58,P<0.001)27,同时在脑转移患者中伏美替尼组的mPFS显著长于吉非替尼(20.8比9.8个月,HR=0.40,95%CI:0.23~0.71,P<0.001)28

因EGFRm患者一线使用TKI耐药后治疗选择有限。许多临床研究正在探索耐药后的联合治疗模式。在EGFR TKI治疗失败的、EGFRm的非鳞局部晚期或转移性的NSCLC人群中,ORIENT-31是全球首个显示联合抗血管生成+免疫检查点抑制剂(immune checkpointInhibitors,ICI)+化疗,能够显著延长患者PFS的前瞻性、双盲Ⅲ期临床研究。2022年ESMO公布了第二次期中分析结果显示,信迪利单抗注射液联合贝伐珠单抗类似物联合化疗组(试验组A)、信迪利单抗注射液联合化疗组(试验组B)和化疗组(对照组C)的mPFS分别为7.2、5.5和4.3个月;B组较C组PFS差异有统计学意义(HR=0.723,95%CI:0.552~0.948,P=0.018 1)29, 30。在既往使用过奥希替尼和含铂化疗进展的晚期NSCLC患者中,ⅠB~Ⅱ期的CHRYSALIS-2研究(NCT04077463)评价了埃万妥单抗联合拉泽替尼的疗效,50例可评估疗效的A组患者的ORR为36%(95%CI:23%~51%),且安全性可控31

2.EGFR少见突变患者的靶向治疗:EGFR 20号外显子插入突变(EGFR Exon20 insertion mutation,EGFR Exon20ins)因其独特的蛋白结构,缺乏有效的靶向药物。埃万妥单抗和莫博替尼在2021年先后被FDA批准用于含铂化疗失败后的EGFR Exon20ins突变NSCLC患者。此外,Ⅰ/ⅡA期临床研究探究CLN-081(TAS6417)在既往接受含铂化疗的EGFR ex20ins突变NSCLC复发或转移患者中的疗效,100 mg,每日2次剂量组的39例患者中,已确认的部分缓解(PR)率为41%,mPFS为12个月[95%CI:5个月~不可评估(NC)],在总体研究人群(n=73)中,确认PR率为38.4%,中位缓解持续时间(mDOR)为10个月[95%CI:6个月~NC],mPFS为10(95%CI:6~12)个月32。国产药物舒沃替尼的Ⅱ期WU-KONG6研究中,纳入经治的NSCLC EGFR Exon20ins患者,ORR为59.8%(58/97),脑转移患者ORR为48.5%(16/33)33

3.ALK重排患者的靶向治疗:ALK TKI是晚期ALK重排NSCLC患者的一线治疗选择,包括:一代药物克唑替尼;二代药物阿来替尼、赛瑞替尼、布加替尼,国产药物恩沙替尼;三代药物劳拉替尼34

Ⅲ期随机CROWN(NCT03052608)研究纳入初治的ALK阳性晚期NSCLC患者,结果显示使用劳拉替尼比克唑替尼治疗患者的PFS更长,并且具有更强的颅内抗肿瘤活性35。2022年我国的一项Ⅱ期临床研究(NCT03909971)纳入了既往接受ALK TKI治疗的NSCLC人群,劳拉替尼也展示了良好的整体疗效及颅内活性,队列1患者仅接受过克唑替尼治疗;队列2接受过非克唑替尼的其他靶向药物治疗。队列1及队列2的ORR分别为70.1%(95%CI:57.7%~80.7%,P<0.001,主要终点)、47.6%(95%CI:32.0%~63.6%,P<0.001,次要终点)。在脑转移的患者中,队列1(n=36)中80.6%(95%CI:64.0%~91.8%)患者和队列2(n=21)中47.6%(95%CI:25.7%~70.2%)患者达到颅内缓解36

4.ROS1突变的靶向治疗:在Ⅰ/Ⅱ期TRIDENT-1试验中,新一代ROS1和原肌球蛋白相关激酶(tropomyosin-related kinase,TRK)抑制剂瑞波替尼在ROS1重排的晚期NSCLC的初治和经治患者中均表现出持久的临床活性及颅内疗效。分为4个队列:队列1为初治的ROS1阳性患者队列;队列2为接受过1种铂类化疗和1种ROS1 抑制剂治疗的队列;队列3为接受2种ROS1 抑制剂未接受化疗治疗的队列;队列4 为接受1种ROS1 抑制剂但未接受化疗治疗的队列。队列1的ORR为78.9%(95%CI:67.6%~87.7%),12个月DOR率为86.1%(95%CI:76%~96%)。在经治的患者中,包括ROS1 G2032R耐药突变患者中,也观察到了瑞波替尼的临床疗效,ORR为58.5%(95%CI:32.9%~81.6%)。基于该临床试验的中国数据,瑞波替尼被NMPA授予突破性治疗指定,包括:未接受TKI治疗的ROS1阳性NSCLC,既往仅接受过1种ROS1 TKI治疗的患者,既往接受过1种ROS1 TKI治疗及1种化疗的患者37

单臂Ⅱ期临床研究中(NCT03972189)纳入初治的ROS1阳性的NSCLC患者,其中我国自主研发的优克替尼组的ORR为78.4%(95%CI:69.6%~85.6%),PFS为15.6(95%CI:10.2~27.0)个月38,显示出良好的疗效及安全性。NVL-520(美国Nuvalent公司研发)的临床前研究显示其对多种ROS1融合以及突变显示出高活性;目前,NVL-520针对晚期ROS1阳性NSCLC和其他实体瘤患者的Ⅰ/Ⅱ期ARROS-1研究(NCT05118789)正在进行中39

5.MET突变的靶向治疗:目前FDA已批准卡马替尼和特泊替尼用于一线和后线治疗局部晚期或转移性MET 14跳跃突变(METex14+)的NSCLC患者40, 41。赛沃替尼是我国自主研发的MET抑制剂,已被NMPA批准用于METex14+NSCLC的后线治疗。一项Ⅱ期临床研究纳入初治或经治的METex14+NSCLC患者(NCT02897479),2022年WCLC的最新数据进一步证实了赛沃替尼对METex14+NSCLC患者的疗效以及可接受的安全性;mOS为12.5个月(95%CI:10.5~21.4);18个月OS率为42.1%;24个月OS率为31.5%42

此外,研究人员在CHRYSALIS研究(NCT02609776)的MET-2队列中,发现埃万妥单抗在晚期METex14+NSCLC中表现出抗肿瘤活性43。在Ⅱ期GLORY研究的局部晚期或转移性METex14+的患者中,谷美替尼的ORR为60.9%(95%CI:48.4%~72.4%),PFS为7.6个月(95%CI:4.2~NC)44

6.KRAS抑制剂:靶向NSCLC中的KRAS突变是目前靶向治疗的难点和热点,目前KRAS突变的LUAD患者的一线治疗为免疫治疗或免疫治疗联合化疗。二线治疗中,基于Ⅰ/Ⅱ期 CodeBreaK100(NCT03600883)全球研究结果,索托拉西布(AMG-510)已获 FDA 批准,用于KRAS p.G12C 突变的局部晚期或转移性NSCLC患者的二线治疗。2年长期随访中ORR为40.7%(95%CI:33.2%~48.4%),OS为12.5个月(95%CI:10.0~17.8)45。Ⅲ期CodeBreaK 200研究(NCT04303780)纳入经治的KRAS突变NSCLC患者,AMG-510组与多西他赛组的PFS 为5.6 比 4.5个月(HR=0.66,95%CI:0.51~0.86,P=0.002),OS差异无统计学意义46。KRYSTAL-1的Ⅰ期和Ⅱ期试验中,48例患者(42.9%)达到经确认的客观缓解,mPFS为6.5个月(95%CI:4.7~8.4个月),mOS 12.6个月(95%CI:9.2~19.2个月)。据此阿达格拉西布(MRTX849)获得FDA的突破性治疗指定:用于既往接受过铂类化疗或者ICI治疗的KRAS G12C突变的晚期NSCLC患者 47。国产KRAS G12C口服抑制剂D-1553的Ⅰ期临床研究,纳入KRAS G12C突变的晚期或转移性NSCLC患者,其中ORR为37.8%,DCR为91.8%,mPFS为7.6个月(95%CI:5.4个月~NC),并在脑转移患者中观察到一定的疗效48

7.NTRK抑制剂:NTRK重排包括NTRK1、NTRK2和NTRK3的融合49。多激酶TRK抑制剂恩曲替尼和特异性TRK抑制剂拉罗替尼均已在NTRK重排的肿瘤患者中获得FDA的批准。在Ⅰ/Ⅱ期TRIDENT-1研究的最新数据更新中(NCT03093116),瑞波替尼在NTRK突变的初治和经治晚期实体瘤患者中显示出临床效果,初始患者和经治患者的ORR分别为54%(95%CI:36.6%~71.2%)和43.2%(95%CI:28.3%~59.0%)50。2022年ASCO发布了恩曲替尼治疗局部晚期/转移性NTRK融合阳性(NTRK-fp)实体瘤患者的疗效和安全性数据,3项Ⅰ/Ⅱ期试验[ALKA-372-001(EudraCT 2012-000148-88);STARTRK-1(NCT02097810);STARTRK-2(NCT02568267)]的综合分析结果显示,ORR为61.3%(n=92/150,95%CI:53.1%~69.2%),mDOR、PFS和OS分别为20.0个月(95%CI:13.2~31.1个月)、13.8个月(95%CI:10.1~20.0个月)和37.1个月(95%CI:27.2个月~NC)51。由于NTRK重排罕见,尽管具有较好的持久性结果,但NTRK重排患者的治疗仍然是一个巨大的挑战,需要进一步的探索。

(二)免疫治疗

1.免疫联合化疗:免疫治疗±化疗成为目前驱动基因阴性NSCLC的标准一线治疗。2022年ESMO大会上发布的Ⅲ期KEYNOTE-189(NCT02578680)及KEYNOTE-407(NCT02775435)5年更新数据进一步支持该联合治疗模式。在KEYNOTE-189研究(初治的EGFR/ALK阴性的转移性非鳞NSCLC)中,帕博丽珠单抗+化疗对比化疗,mOS为22.0 比10.6个月(HR=0.60,95%CI:0.50~0.72),5年OS率为19.4% 比 11.3% 52。在KEYNOTE-407研究(初治的EGFR/ALK阴性的转移性LUSC)中,帕博丽珠单抗+化疗对比化疗,mOS为17.2比 11.6个月(HR=0.71,95%CI:0.59~0.85),5年OS率为18.4%比9.7% 53

2022年FDA的荟萃分析显示:对于肿瘤细胞PD-L1阳性比例分数(tumor proportion score,TPS)≥50%的NSCLC患者,化疗联合ICI(n=455)和仅ICI治疗(n=1 298)组的mOS分别为25.0和20.9个月(HR=0.82,95%CI:0.62~1.08);mPFS分别为9.6个月和7.1个月(HR=0.69,95%CI:0.55~0.87);ORR(61%比43%,OR=1.2,95%CI:1.1~1.3);与单药ICI相比,≥75接受化疗联合ICI治疗对比单药ICI的患者获益差异无统计学意义54

在Ⅲ期POSEIDON研究中(NCT03164616),与单独化疗相比,一线度伐利尤单抗+化疗显著改善了晚期NSCLC患者的PFS,OS具有积极改善趋势但差异无统计学意义;与化疗相比,一线替西木单抗+度伐利尤单抗+化疗显示PFS和OS差异有统计学意义和有临床意义的改善;丝苏氨酸激酶(serine-threonine kinase 11,STK11)突变、Kelch 样环氧氯丙烷相关蛋白 1(Kelch like ECH associated protein 1,KEAP1)突变 和KRAS突变亚组患者ORR分别为45.2%、45.5%、55.0%;显示三联方案在一线治疗难治性NSCLC中是有潜力的55。ⅠB/Ⅱ期的临床试验数据提示,MEDI5752(PD-1/CTLA-4 双特异性单抗)联合化疗在一线晚期非鳞状 NSCLC 患者中显示出更好的抗肿瘤活性,反应持续时间增加了1倍,在随机队列中,mPFS 和 mOS 优于帕博丽珠单抗联合化疗;MEDI5752在肿瘤PD-L1 TPS<1%的患者中的临床获益与之前的数据一致56

2.单药免疫治疗:对于PS评分较差(≥2)或70岁以上有并发症不适合含铂双药治疗的患者,Ⅲ期的IPSOS研究(NCT0391786)评估了一线阿替利珠单抗对比单药化疗(长春瑞滨或吉西他滨)治疗局部晚期/转移性NSCLC的治疗效果,OS分别为10.3 比 9.2个月(HR=0.78,95%CI:0.63~0.97,P=0.028),无论PD-L1表达与否,单独免疫治疗相较于化疗在这部分患者中有OS获益且治疗相关不良事件发生率更低57

免疫治疗耐药后的治疗模式是目前临床面临的主要困境之一。一项临床研究探究了完成35个周期(约2年)帕博利珠单抗治疗后疾病进展的患者重启免疫治疗可否带来获益,该分析汇总了KEYNOTE-024、KEYNOTE-042、KEYNOTE-589中接受帕博利珠单抗治疗组(队列1),以及KEYNOTE-189、KEYNOTE-407中接受帕博利珠单抗联合化疗组(队列2)的数据,发现2年帕博利珠单抗治疗后停药后进展,再次接受帕博利珠单抗治疗的安全性可控,队列1和队列2的6个月PFS率分别为59.6%(95%CI:45.0%~71.5%)和58.3%(95%CI:27.0%~80.1%);队列1和队列2的OS率分别为85.4%(95%CI:72.9%~92.4%)和86.3%(95%CI:55.0%~96.4%)58。另外有研究表明ICI治疗失败后,将PD-1 转换为 PD-L1,可能对 NSCLC 有益,mPFS 优于单药化疗,反之亦然;对于治疗选择有限的晚期NSCLC患者,应考虑使用第2次ICI59。我国数据证实对于免疫耐药的有寡转移病史的再次寡进展患者,局部消融治疗是最佳选择,而免疫维持治疗适用有多转移病史的再次寡进展患者60

3.双免治疗:2022年ASCO大会中公布了Ⅲ期CheckMate 227研究(NCT02477826)的5年生存结果,晚期的EGFR/ALK阴性的NSCLC患者中,PD-L1 TPS≥1%的患者观察到纳武利尤单抗+伊匹木单抗组与化疗组相比具有长期OS获益(HR=0.77,95%CI:0.66~0.91)。PD-L1 TPS<1%的患者中,纳武利尤单抗+伊匹木单抗组与化疗组相比,OS获益也持续存在(HR=0.65,95%CI:0.52~0.81)。证实纳武利尤单抗+伊匹木单抗组与化疗组相比存在临床获益61

Ⅲ期的NEPTUNE(NCT02542293)中国队列研究纳入转移性NSCLC初治患者,一线度伐利尤单抗联合替西木单抗与化疗相比,表现出改善OS的趋势62。Ⅱ期SQUINT研究(NCT03823625)结果表明,对于晚期LUSC患者,纳武利尤单抗+伊匹木单抗与化疗+纳武利尤单抗疗效差异无统计学意义63

(三)ADC治疗

ADC由一种细胞毒性药物(称为“有效载荷”)与单克隆抗体结合组成,靶向癌细胞上特异性表达的抗原。目前HER-2 ADC、HER-3 ADC及人滋养细胞表面抗原2(trophoblast cell surface antigen 2,TROP-2)ADC的临床研究正在积极探索中。

基于多中心、随机、双盲、剂量优化的Ⅱ期DESTINY-Lung02研究(NCT04644237)中,对于经治的NSCLC患者,HER2-ADC药物Enhertu(DS-8201)被证实达到58%的ORR(95%CI:43%~71%),mDOR为8.7个月(95%CI:7.1个月~NA)64。2022年8月12日,Enhertu获美国FDA加速批准,用于治疗携带HER-2阳性的不可切除或转移性经治NSCLC患者。

晚期EGFRm NSCLC患者在EGFR TKI和铂类化疗进展后,治疗选择有限。HER-3过表达被认为是EGFR TKI的耐药机制之一65。Patritumab Deruxtecan(U3-1402)是靶向HER-3的ADC药物,Ⅰ期临床试验结果显示EGFR TKI耐药或含铂化疗后进展的患者使用U3-1402,ORR 为39%(95%CI:26.0%~52.4%),mPFS为8.2个月(95%CI:4.4~8.3)66

Dato-DXd是一种靶向TROP-2的新型ADC。Ⅱ期TROPION-Lung02研究(NCT04526691)评估Dato-DXd与帕博利珠单抗±铂类化疗方案治疗初治或经治,且无可靶向基因驱动的晚期或转移性NSCLC患者的安全性和疗效,目前在一线治疗中显示出令人鼓舞的抗肿瘤活性67

靶向治疗及免疫治疗的出现是NSCLC治疗史上的突破性进展,有效改善了晚期不可切除NSCLC患者一线治疗的PFS及ORR。国内肿瘤新药研发与国外的差距正在进一步地缩小,同时靶向治疗及免疫治疗在可切除的NSCLC的新辅助治疗,术后维持治疗中的适应证也在积极探究,并取得了相当的疗效和安全性。而一线免疫及靶向治疗进展后的晚期NSCLC患者,后线治疗中需要新的组合和策略。

引用本文:

杨莹, 李子明, 朱可喻, 等. 非小细胞肺癌治疗年度进展2022[J]. 中华医学杂志, 2023, 103(14): 1074-1081. DOI: 10.3760/cma.j.cn112137-20221212-02628.

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