PD-1/PD-L1抑制剂在晚期尿路上皮癌中的研究进展

摘 要：含顺铂方案的化疗是晚期尿路上皮癌的一线治疗方式,不耐受顺铂化疗的及一线标准化疗后发生疾病进展的患者可选择的有效治疗有限,平均生存期约5~10个月。程序性死亡受体1（programmed death 1,PD-1）/程序性死亡配体1（programmed death ligand 1,PD-L1）抑制剂在大型临床试验中显示出持久的抗肿瘤效应和可耐受的安全性,为改善晚期尿路上皮癌患者预后带来了希望。PD-1抑制剂Pembrolizumab是第一个获得美国食品药品管理局（Food and Drug Administration,FDA）批准的治疗晚期尿路上皮癌的一线免疫治疗药物。2种PD-1抑制剂Pembrolizumab和Nivolumab,3种PD-L1抑制剂Atezolizumab、Durvalumab和Avelumab,先后获得美国FDA批准作为含铂方案化疗进展的晚期尿路上皮癌患者的二线治疗药物。全文就PD-1/PD-L1抑制剂在晚期尿路上皮癌中的研究进展作一综述。     

双免疫联合治疗在晚期非小细胞肺癌中的一线应用

近年来,程序性死亡受体1(programmed death protein-1,PD-1)/程序性死亡配体1(programmed death-ligand 1,PD-L1)抑制剂单药、PD-1抑制剂联合化疗日益广泛地用于非小细胞肺癌(non-small cell lung cancer,NSCLC)的一线治疗,但PD...     

晚期非小细胞肺癌PD-1/PD-L1单抗治疗临床转化现状

随着对肿瘤免疫逃逸机制研究的不断深入,通过阻断程序性死亡因子1（programmed cell death 1,PD-1）及其配体l （PD-1 ligand,PD-L1）构成的 PD-1/PD-L1 通路,证实了 PD-1/PD-L1 抑制剂在晚期非小细胞肺癌（non small cell lung cancer, NSCLC）患者生存的相关性,以及PD-L1作为疗效预测标志物的价值。在NSCLC的局部晚期维持治疗、二线治疗及部分一线治 疗的临床试验中,PD-1/PD-L1抑制剂治疗均获得了较好的治疗效果;PD-1/PD-L1抑制剂联合放化疗、联合细胞因子与其他免疫 抑制剂及联合细胞外调节蛋白激酶(extracel lular regulated protein kinase,ERK)通路靶向治疗也有一定获益。本文就PD-1/PD-L1 抑制剂用于NSCLC治疗现状及其影响因素作一综述。     

PD-1/PD-L1治疗非小细胞肺癌的研究进展

程序性死亡受体-1（programmed cell death-1,PD-1）/程序性死亡配体-1（programmed cell death-ligand 1,PD-L1）信号通路与肿瘤免疫逃逸密切相关,针对PD-1/PD-L1通路的免疫检查点抑制剂为非小细胞肺癌（non-small cell lung cancer,NSCLC）患者提供了一种新的治疗选择,并且显示出良好的疗效和安全性。本文对PD-1/PD-L1抑制剂治疗NSCLC的临床研究进展进行综述。      

程序性死亡受体1及其配体1抑制剂在晚期非小细胞肺癌免疫治疗中的研究进展

非小细胞肺癌(NSCLC)是肺癌最常见的病理类型。近年来, 免疫治疗迅速发展, 免疫检查点抑制剂特别是程序性死亡受体1(PD-1)/程序性死亡受体配体1(PD-L1)抑制剂已经在NSCLC的治疗中取得突破性进展, 打破了传统放、化疗有效率低、靶向治疗耐药广泛的格局, 为患者带来生存获益。文章针对PD-1/PD-L1抑制剂在晚期NSCLC中的临床研究进展进行综述。     

PD-1/PD-L1在肿瘤免疫逃逸中的作用机制及其临床应用

程序性死亡受体-1 (programmed death receptor-1,PD-1)是T细胞上主要存在的一种抑制性受体,与程序性死亡受体配体-1 (programmed death receptor ligand-1,PD-L1)相互作用,可抑制T细胞增殖、活化.在正常机体中,PD-1/PD-L1信号通路对维持机体的免疫耐受具有重要作用;而在肿瘤发生时,PD-1/PD-L1信号通路能抑制T细胞的免疫反应而促进肿瘤免疫逃逸的发生.本文从PD-1/PD-L1的发现及其结构、信号通路的作用机制、PD-1/PD-L1抗体在肿瘤免疫治疗中的应用等方面进行综述.     

PD-1/PD-L1抑制剂在尿路上皮癌治疗中的研究进展

近年来,随着人们对肿瘤免疫生物学认识的不断深入,针对免疫检查点抑制的系统免疫疗法在尿路上皮癌领域得到了广泛的探索和临床应用。程序性细胞死亡受体1(programmed death 1,PD-1)及其配体(programmed death ligand 1,PD-L1)是机体免疫活性的重要负性调节因子,可防止正常组织和自身免疫功能的破坏。迄今为止,美国食品和药物管理局(Food and Drug Administration,FDA)已批准了可阻断PD-1(Pembrolizumab和Nivolumab)或PD-L1(Atezolizumab、Durvalumab和Avelumab)的五种免疫检查点抑制剂,根据在相关临床试验中观察到的持久的治疗反应和可控的安全性,用于局部晚期或转移性尿路上皮癌的一线或二线治疗。本文就PD-1/PD-L1抑制剂在尿路上皮癌中的研究进展作一综述。     

免疫检查点抑制剂一线治疗晚期NSCLC的现状与展望

随着程序性凋亡因子1受体(programmed death-1,PD-1)及其配体(PD-L1)抑制剂单药治疗在晚期非小细胞肺癌(non-small cell lung cancer,NSCLC)的二线和一线治疗中相继取得突破性进展,晚期NSCLC的诊治策略正在逐渐发生演变和优化.免疫联合治疗扩大受益人群、提高疗效,目前已经在一线治疗领域取得初步结果,有多项Ⅲ期随机对照研究正在进行中.本文将对免疫检查点抑制剂在晚期NSCLC一线治疗中的现状和前景进行综述.     

PD-1/PD-L1抑制剂在晚期肝细胞肝癌治疗中的研究进展

晚期原发性肝细胞肝癌(hepatocellular carcinoma,HCC)的系统治疗主要包括靶向治疗、化疗以及免疫治疗。近3年,程序性死亡受体-1(programmed death receptor-1,PD-1)/程序性死亡受体-1配体(programmed death receptor-1 ligand,PD-L1)抑制剂在晚期HCC治疗中取得突破性进展。纳武单抗(nivolumab)和帕博利珠单抗(pembrolizumab)先后被美国食品药品管理局(FDA)批准用于HCC二线治疗。多个PD-1/PD-L1抑制剂联合系统治疗的Ⅰ、Ⅱ期临床研究初步显示出较好的疗效和安全性。阿特珠单抗(atezolizumab)联合贝伐单抗一线治疗成为首个在Ⅲ期临床研究中证实优于现有标准治疗索拉非尼的全新疗法。本文就近年PD-1/PD-L1抑制剂在晚期HCC治疗中的研究进展进行概述。     

晚期胃癌免疫检查点抑制剂治疗的临床研究进展

[摘要] 晚期胃癌治疗方法有限,预后较差。2017 年,针对程序性死亡蛋白-1（programmed cell death protein-1, PD-1）和程序性死亡配体-1（programmed death ligand-1, PD-L1）的免疫检查点抑制剂获批用于晚期胃癌治疗,提示胃癌免疫治疗时代已经到来。然而,相对于肺癌,免疫检查点抑制剂尚未获批用于胃癌一、二线治疗。目前,大量胃癌免疫治疗临床试验正在进行中,其模式还在进一步优化,包括免疫联合化疗、免疫检查点抑制剂联合其他免疫治疗及新型免疫检查点抑制剂的应用等,同时寻找合适的肿瘤标志物,筛选优势人群用于胃癌精准免疫治疗。本文着重讨论晚期胃癌免疫检查点抑制剂治疗的临床研究最新进展。     

Combination Strategies on the Basis of Immune Checkpoint Inhibitors in Non–Small-Cell Lung Cancer: Where Do We Stand?

The era of immune checkpoint inhibitors, especially programmed death-1 (PD-1)/programmed death ligand-1 (PD-L1) antibodies in the treatment of advanced non–small-cell lung cancer (NSCLC) is coming. Because of the lack of the definite biomarkers to select the optimal responders, only approximately 20% of patients with advanced NSCLC would respond to single checkpoint inhibitors-based immunotherapy. Moreover, primary or acquired resistance to conventional therapies is inevitable in most cases. Thus, combinations are pushed to move forward to be an alternative strategy and surely, it would be a future direction. Combination approaches on the basis of PD-1/PD-L1 inhibitors are currently designed to re-energize the immune system with complementary/synergetic mechanisms and could achieve durable antineoplastic effects in NSCLC. Herein, we highlight the potential combinations on the basis of PD-1/PD-L1 inhibitors in NSCLC, with other immunotherapies, chemotherapy, radiotherapy, and targeted therapy in this current review.     

PD-1/PD-L1抑制剂在膀胱癌新辅助治疗中的应用进展

膀胱癌是一种泌尿系统常见的肿瘤,单纯根治切除手术治疗的患者面临较高复发和转移风险,5年生存率为60~80%。在减少复发、转移和延长生存期的探索中,指南推荐以顺铂为基础的化疗作为标准新辅助治疗。但部分患者无法耐受化疗或对化疗不敏感,新辅助治疗应用率较低,未广泛开展。程序性死亡因子1(PD-1)和程序性死亡因子配体1(PD-L1)是重要的免疫检验点共抑制分子,通过抑制T细胞的激活和增殖通路参与肿瘤的免疫逃逸。近年来一批PD-1/PD-L1抑制剂被批准用于局晚期膀胱癌的一线、二线治疗,疗效及安全性得到证实,因此一些最新的研究探索将PD-1/PD-L1抑制剂运用于新辅助治疗。本文主要对近年来相关研究进行了回顾与总结,探讨PD-1/PD-L1抑制剂在膀胱癌新辅助治疗应用的前景和可能发展的方向。     

Comparative Efficacy of Second- and Subsequent-line Treatments for Metastatic NSCLC: A Fractional Polynomials Network Meta-analysis of Cancer Immunotherapies

BackgroundExtended onset of treatment effect and longer-term survival with anti–programmed death-ligand 1 (PD-L1)/programmed cell death protein 1 (PD-1) immunotherapies, atezolizumab, nivolumab, and pembrolizumab, have changed the landscape of second- or subsequent-line (2L+) treatments for adults with non–small-cell lung cancer (NSCLC). This systematic literature review included phase I to IV randomized, controlled trials of 2L+ NSCLC therapies from MEDLINE, Embase, and secondary sources.Materials and MethodsStudies of treatments approved in the European Union or United States had to be in English with ≥ 10 patients per arm. A fractional polynomials network meta-analysis (NMA) was conducted because traditional NMA of hazard ratios does not account for delayed onset of clinical effect or long-term survival observed in PD-L1/PD-1 inhibitor trials. Adjusted analyses accounted for treatment switching in the atezolizumab OAK trial. Expected survival time reflected area under the curve over the time horizon. Expected overall survival (OS) was ranked by median ranking with 95% credible intervals and by surface under the cumulative ranking curve. Of 25,115 screened records, 28 studies were included in the quantitative analyses of OS and progression-free survival.ResultsPD-L1/PD-1 inhibitors had comparable expected 5-year OS; all performed better than other treatment options. In unadjusted analyses, surface under the cumulative ranking curve ranked nivolumab first (87.9%), followed by atezolizumab (85.8%) and pembrolizumab (82.8%). Analyses adjusted for patients switching from docetaxel to immunotherapy ranked atezolizumab first (89.6%), followed by nivolumab (86.5%) and pembrolizumab (81.9%).ConclusionThis NMA applied an appropriate approach for indirect comparisons, including cancer immunotherapies, and supported robustness of PD-L1/PD-1 immunotherapies for 2L+ treatment of NSCLC.     

程序性死亡蛋白1及其配体在结直肠癌中的临床研究现状

程序性死亡蛋白-1(Programmed cell death protein-1,PD-1)通过与程序性死亡蛋白配体-1(Programmed cell death protein ligand-1,PD-L1)相互作用进而发挥负向调节机体免疫反应机制,促使肿瘤细胞发生免疫逃逸。以PD-1/PD-L1为靶点的免疫治疗已成为肿瘤治疗的新模式。目前,手术和放化疗仍然是结直肠癌的主要治疗手段,但生存率没有明显的改善。研究显示PD-1/PD-L1抑制剂单药治疗或与放化疗和手术联合治疗在结直肠癌中取得了可观的效果,且相关的临床试验正在进行。本文阐述了PD-1/PD-L1信号通路相关的分子生物学机制及PD-L1的表达与结直肠癌放化疗和预后的关系,并介绍了PD-1/PD-L1抑制剂在结直肠癌中的临床研究进展。     

The Significance of the PD-L1 Expression in Non–Small-Cell Lung Cancer: Trenchant Double Swords as Predictive and Prognostic Markers

Lung cancer is the leading cause of death due to cancer worldwide. Surgery, chemotherapy, and radiotherapy have been the standard treatment for lung cancer, and targeted molecular therapy has greatly improved the clinical course of patients with non–small-cell lung cancer (NSCLC) harboring driver mutations, such as in epidermal growth factor receptor and anaplastic lymphoma kinase genes. Despite advances in such therapies, the prognosis of patients with NSCLC without driver oncogene mutations remains poor. Immunotherapy targeting programmed cell death-1 (PD-1) and programmed cell death-ligand 1 (PD-L1) has recently been shown to improve the survival in advanced NSCLC. The PD-L1 expression on the surface of tumor cells has emerged as a potential biomarker for predicting responses to immunotherapy and prognosis after surgery in NSCLC. However, the utility of PD-L1 expression as a predictive and prognostic biomarker remains controversial because of the existence of various PD-L1 antibodies, scoring systems, and positivity cutoffs. In this review, we summarize the data from representative clinical trials of PD-1/PD-L1 immune checkpoint inhibitors in NSCLC and previous reports on the association between PD-L1 expression and clinical outcomes in patients with NSCLC. Furthermore, we discuss the future perspectives of immunotherapy and immune checkpoint factors.     

PD-1/PD-L1免疫检查点抑制剂在多形性胶质母细胞瘤中的研究进展

多形性胶质母细胞瘤(Glioblastoma multiforme, GBM)是目前最常见的原发性恶性脑肿瘤之一。GBM具有高侵袭性、高复发率和低生存率等特点,预后较差。程序性细胞死亡受体1(Programmed cell death receptor 1,PD-1)/程序性细胞死亡配体1(Programmed cell death ligand 1,PD-L1)作为主要的免疫检查点(Immune checkpoint, IC),形成免疫通路,可触发免疫反应的负性调控,增强脑组织中GBM细胞的侵袭性。在GBM的治疗研究中,免疫检查点抑制剂(Immune checkpoint inhibitor, ICI)也受到了相当大的关注。ICI通过抑制负性免疫调节途径来激活抗肿瘤反应,为GBM提供了新的治疗途径。目前已有多项临床研究集中在标准治疗(替莫唑胺、放疗)、靶向治疗和其他免疫治疗的联合应用方面。本综述阐述了PD-1/PD-L1通路,概述了PD-1/PD-L1 ICI单药、新辅助治疗以及联合化疗、放疗、靶向治疗、激素等多种方式治疗GBM的研究进展。     

程序性死亡分子1免疫治疗在B细胞淋巴瘤中的研究进展

免疫检查点阻滞剂抗程序性死亡分子1（PD-1）／PD-1配体（PD-L1）抗体类药物的研发是目前肿瘤治疗领域的研究热点。越来越多的临床试验证实抗PD-1／PD—L1抗体在各类肿瘤的治疗中具有良好的疗效和安全性。研究已证实该类药物在实体瘤中具有显著疗效,其在淋巴瘤治疗中的独特机制也逐渐被发现,文章就PD-1在B细胞淋巴瘤中的最新研究进展进行介绍。     

The evolving role of PD-L1 testing in patients with metastatic urothelial carcinoma

Immune checkpoint inhibitors targeting the programmed cell death 1 (PD-1)/programmed cell death ligand 1 (PD-L1) pathway improve clinical outcomes in patients with locally advanced/metastatic urothelial carcinoma (UC). PD-L1 complementary or companion diagnostic assays are now available for anti–PD-1 and anti–PD-L1 antibodies and these assays enable testing at diagnosis. The role of PD-L1 testing in UC is, however, the subject of much discussion within the medical community, particularly in light of recent restrictions on recruitment of PD-L1–low patients in clinical trials of atezolizumab and pembrolizumab as first-line therapy, and the European Medicines Agency and US Food and Drug Administration limiting use of these agents as first-line therapy in cisplatin-ineligible patients to those with high PD-L1 expression. We explore the evolving evidence for PD-L1 expression testing in UC and the role of PD-L1 expression in both tumor cells and tumor-infiltrating immune cells. We review clinical data on the prognostic and predictive value of PD-L1 expression in response to anti–PD-1/PD-L1 agents as first- and second-line therapy, considering issues such as the differences among complementary diagnostic assays in terms of the type of cells scored, antibodies used, and cutoff values. We consider how PD-L1 testing fits into decision-making and the potential of emerging biomarkers in UC. We conclude that, based on the scientific rationale for its use and evidence from clinical trials, PD-L1 testing provides enriched information on the patients most likely to benefit from immune checkpoint blockade and should be routinely offered to patients with metastatic UC.     

Association Between Clinical Tumor Burden and Efficacy of Immune Checkpoint Inhibitor Monotherapy for Advanced Non–Small-Cell Lung Cancer

BackgroundProgrammed cell death 1 (PD-1) inhibitors have become a standard treatment, albeit not completely effective, for patients with advanced non–small-cell lung cancer (NSCLC). Previous studies of advanced melanoma have revealed that the tumor burden predicted the response to PD-1 inhibitors, although this relationship has remained unclear for NSCLC.Patients and MethodsThe present single-center retrospective study evaluated 163 patients with advanced NSCLC who had received PD-1/programmed cell death ligand 1 (PD-L1) inhibitor monotherapy from December 2015 to December 2018. The clinical tumor burden was estimated using the baseline sum of the target lesions’ longest diameters (BSLDs), measured according to the Response Evaluation Criteria for Solid Tumors, and the baseline number of metastatic lesions (BNMLs).ResultsThe optimal cutoff values for predicting progression-free survival (PFS) were 5 for the BNMLs and 76 mm for the BSLDs, using the minimum P value method. The low-BNML group included 73 patients (44.8%). The median PFS was 12.2 months in the low-BNML group and 2.8 months in the high-BNML group (hazard ratio, 0.51; P = .0005). The low-BSLD group included 92 patients (56.4%). The median PFS was 9.6 months in the low-BSLD group and 3.4 months in the high-BSLD group (hazard ratio, 0.52; P = .0006). Multivariable analysis revealed that low-BSLD, low-BNML, nonsquamous histologic type and a PD-L1 tumor proportion score of ≥ 50% were independently associated with prolonged PFS.ConclusionsPD-L1 expression and the clinical tumor burden can predict the efficacy of PD-1/PD-L1 inhibitor monotherapy for NSCLC.