腫瘤MHC I類限制性抗原與腸球菌噬菌體之間的交叉反應
作者:
小柯機器人發布時間:2020/8/21 18:40:48
法國古斯塔夫·魯西癌症園區(GRCC)Laurence Zitvogel和Guido Kroemer研究組合作取得最新進展。他們發現腫瘤主要的組織相容性複合物(MHC)I類限制性抗原能夠與腸球菌噬菌體進行交叉反應。相關論文於2020年8月21日發表於《科學》。
他們在噬菌體腸球菌基因組中的噬菌體尾長捲尺蛋白(TMP)中鑑定了MHC I類結合表位。用環磷醯胺或抗PD-1抗體進行免疫治療後,攜帶該噬菌體的平腸埃希氏菌感染的小鼠,產生了TMP特異性H-2Kb限制的CD8 + T淋巴細胞應答。經改造可表達TMP表位的細菌菌株改善了小鼠的免疫治療。在腎癌和肺癌患者中,糞便中腸球菌的存在以及腫瘤TMP交叉反應抗原的表達與PD-1阻斷療法的長期獲益相關。在黑色素瘤患者中,檢測到識別與微生物肽交叉反應的天然加工的癌症抗原T細胞克隆。
研究人員表示,腸道菌群能夠誘導與腫瘤相關抗原交叉反應的共生特異性記憶T細胞。
附:英文原文
Title: Cross-reactivity between tumor MHC class I–restricted antigens and an enterococcal bacteriophage
Author: Aurélie Fluckiger, Romain Daillère, Mohamed Sassi, Barbara Susanne Sixt, Peng Liu, Friedemann Loos, Corentin Richard, Catherine Rabu, Maryam Tidjani Alou, Anne-Galle Goubet, Fabien Lemaitre, Gladys Ferrere, Lisa Derosa, Connie P. M. Duong, Meriem Messaoudene, Andréanne Gagné, Philippe Joubert, Luisa De Sordi, Laurent Debarbieux, Sylvain Simon, Clara-Maria Scarlata, Maha Ayyoub, Belinda Palermo, Francesco Facciolo, Romain Boidot, Richard Wheeler, Ivo Gomperts Boneca, Zsofia Sztupinszki, Krisztian Papp, Istvan Csabai, Edoardo Pasolli, Nicola Segata, Carlos Lopez-Otin, Zoltan Szallasi, Fabrice Andre, Valerio Iebba, Valentin Quiniou, David Klatzmann, Jacques Boukhalil
Issue&Volume: 2020/08/21
Abstract: Intestinal microbiota have been proposed to induce commensal-specific memory T cells that cross-react with tumor-associated antigens. We identified major histocompatibility complex (MHC) class I–binding epitopes in the tail length tape measure protein (TMP) of a prophage found in the genome of the bacteriophage Enterococcus hirae. Mice bearing E. hirae harboring this prophage mounted a TMP-specific H-2Kb–restricted CD8+ T lymphocyte response upon immunotherapy with cyclophosphamide or anti–PD-1 antibodies. Administration of bacterial strains engineered to express the TMP epitope improved immunotherapy in mice. In renal and lung cancer patients, the presence of the enterococcal prophage in stools and expression of a TMP–cross-reactive antigen by tumors correlated with long-term benefit of PD-1 blockade therapy. In melanoma patients, T cell clones recognizing naturally processed cancer antigens that are cross-reactive with microbial peptides were detected.
DOI: 10.1126/science.aax0701
Source: https://science.sciencemag.org/content/369/6506/936
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037