--本文经《美国外科病理学杂志》授权发布,其他媒体转载或引用须经《美国外科病理学杂志》同意,否则追究法律责任。
慢性淋巴细胞白血病/小淋巴细胞淋巴瘤(chronic lymphocytic leukemia/small lymphocytic lymphoma,CLL/SLL)是一种低度恶性的B细胞肿瘤,约有2%~9%的患者会进展为侵袭性淋巴瘤,其中最常见的是弥漫大B细胞淋巴瘤Richter转化(diffuse large B-cell lymphoma richter transformation,DLBCL-RT)。程序性死亡蛋白-1(programmed death-1,PD-1)信号途径在肿瘤宿主免疫逃逸中起关键作用,阻断该信号途径已成为一种有效的抗肿瘤免疫疗法。PD-1及其配体PD-L1的表达在抗PD肿瘤免疫治疗中具有重要的预测价值;然而,其在CLL/SLL和DLBCL-RT中的表达尚无详尽报道。我们对39例 CLL/SLL、15例DLBCL-RT和26例其他DLBCL病例中通过免疫组化法检测了PD-1和PD-L1的表达水平。在CLL/SLL病例中,肿瘤性B细胞PD-1表达较弱,且局限表达于增殖中心(proliferation centers,PCs)内的前淋巴细胞/副免疫母细胞中,并使各种大小不等的PC凸显出来。而在DLBCL-RT中,肿瘤性B细胞PD-1表达非常常见并且强度增加,但这种情况在其他DLBCL中很少见(12/15vs.1/26;P<0.0001)。在DLBCL-RT中,肿瘤性B细胞PD-1免疫组化阳性率和定义于分子层面的CLL/SLL克隆关联性之间显示很强的相关性(一致性为90%)。在罕见的DLBCL-RT和其他DLBCL病例中,肿瘤性B细胞中可检测到PD-L1的表达(1/15vs.1/26;P>0.05),同时,也可在背景组织细胞和树突细胞中检测到PD-L1表达。DLBCL-RT患者的总生存率显著低于其他类型的DLBCL患者(中位数,16.9vs.106.1个月;P=0.002)。本研究结果提示,从CLL/SLLPC中的前淋巴细胞/副免疫母细胞到DLBCL-RT中的肿瘤性B细胞具有一定的生物学连续性。DLBCL-RT中特征性的PD-1表达使其成为确定CLL/SLL克隆相关性的潜在替代标记物,这一发现可能对预后和治疗具有重要意义。
Am J Surg Pathol 2018;42:843-854
美国外科病理学杂志中文版2019年第一期摘要NO.3
邹子归 翻译 郭凌川 审校
The American Journal of Surgical Pathology中文版声明:
©2018 Wolters Kluwer Health
©2018 Wolters Kluwer Health
The material is published by Wolters Kluwer Health with the permission of American Journal of Surgical Pathology.No part of this publication may be reproduced in any form,stored in a retrieval system or transmitted in any form,by any means,without prior written permission from Wolters Kluwer Health.Opinions expressed by the authors and advertisers are not necessarily those of the American Journal of Surgical Pathology, its affiliates,or of the Publisher.The American Journal of Surgical Pathology,its affiliates,and the Publisher disclaim any liability to any party for the accuracy,completeness,efficacy,or availability of the material contained in this publication (including drug dosages) or for any damages arising out of the use or non-use of any of the material contained in this publication.
Although advertising material is expected to conform to ethical (medical) standards,inclusion in this publication does not constitute a guarantee or endorsement of the quality or value of such product or of the claims made of it by its manufacturer.