B細胞影響肉瘤患者的生存和免疫治療
作者:
小柯機器人發布時間:2020/1/16 16:57:13
2020年1月15日,法國國家健康與醫學研究院Wolf H. Fridman和美國德克薩斯大學MD安德森癌症中心Hussein A. Tawbi研究組在《自然》在線發表論文。他們發現在肉瘤中,B細胞與生存和免疫治療反應相關。
為了解釋肉瘤的臨床異質性,研究人員探究了軟組織肉瘤亞型中608種腫瘤的基因表達譜。研究人員根據腫瘤微環境的組成建立了基於免疫學的分類,並將其分為五種不同的表型:低免疫(A和B),高免疫(D和E)和高度血管化(C)組。對獨立驗證隊列的原位分析表明,E類的特徵是存在三級淋巴樣結構,該結構包含T細胞和濾泡樹突狀細胞,尤其是富含B細胞。即使在高或低CD8 + T細胞或細胞毒性的條件下,B細胞也是最強的影響預後的因素。一項2期臨床試驗表明,E組提高了對派姆單抗聯合PD1阻滯療法的應答率並且改善了生存率。總之,這項工作揭示了軟組織肉瘤患者的免疫亞型,並發現富含B細胞的三級淋巴結構在指導臨床決策和治療的潛力,這在其他疾病中也可能應用價值。
據介紹,軟組織肉瘤是癌症的異質性組,具有50多種組織學亞型。通常不同亞型患者的臨床表現是特異的,並且對諸如免疫檢查點封鎖等療法的反應也存在很大差異。
附:英文原文
Title: B cells are associated with survival and immunotherapy response in sarcoma
Author: Florent Petitprez, Aurlien de Reynis, Emily Z. Keung, Tom Wei-Wu Chen, Cheng-Ming Sun, Julien Calderaro, Yung-Ming Jeng, Li-Ping Hsiao, Laetitia Lacroix, Antoine Bougoin, Marco Moreira, Guillaume Lacroix, Ivo Natario, Julien Adam, Carlo Lucchesi, Yechan Laizet, Maud Toulmonde, Melissa A. Burgess, Vanessa Bolejack, Denise Reinke, Khalid M. Wani, Wei-Lien Wang, Alexander J. Lazar, Christina L. Roland, Jennifer A. Wargo, Antoine Italiano, Catherine Sauts-Fridman, Hussein A. Tawbi, Wolf H. Fridman
Issue&Volume: 2020-01-15
Abstract: Soft-tissue sarcomas represent a heterogeneous group of cancer, with more than 50 histological subtypes1,2. The clinical presentation of patients with different subtypes is often atypical, and responses to therapies such as immune checkpoint blockade vary widely3,4. To explain this clinical variability, here we study gene expression profiles in 608 tumours across subtypes of soft-tissue sarcoma. We establish an immune-based classification on the basis of the composition of the tumour microenvironment and identify five distinct phenotypes: immune-low (A and B), immune-high (D and E), and highly vascularized (C) groups. In situ analysis of an independent validation cohort shows that class E was characterized by the presence of tertiary lymphoid structures that contain T cells and follicular dendritic cells and are particularly rich in B cells. B cells are the strongest prognostic factor even in the context of high or low CD8+ T cells and cytotoxic contents. The class-E group demonstrated improved survival and a high response rate to PD1 blockade with pembrolizumab in a phase 2 clinical trial. Together, this work confirms the immune subtypes in patients with soft-tissue sarcoma, and unravels the potential of B-cell-rich tertiary lymphoid structures to guide clinical decision-making and treatments, which could have broader applications in other diseases.
DOI: 10.1038/s41586-019-1906-8
Source: https://www.nature.com/articles/s41586-019-1906-8