BJH:接受莫加珠单抗治疗的成人 T 细胞白血病-淋巴瘤患者外周血单核细胞中免疫球蛋白 G 重链库的临床意义

2021-12-10 MedSci原创 MedSci原创

PBMC 中较低的 IgG B 细胞多样性,尤其是与较低百分比的 CD2 - CD19 + B 细胞一起,是一个独立的不利预后因素。

成人 T 细胞白血病 - 淋巴瘤 (ATL) 是由人类 T 细胞嗜淋巴细胞病毒 1 型 (HTLV-1) 引起的外周 T 细胞肿瘤。“在成人 T 细胞白血病 - 淋巴瘤 (ATL) 患者中监测含 mogamulizumab 治疗后的免疫反应”(MIMOGA) 是一项多中心前瞻性临床研究 (UMIN000008696)。在 MIMOGA 研究中,研究人员发现较低百分比的 CD2  CD19 +外周血单个核细胞 (PBMC) 中的 B 细胞是总体生存 (OS) 的重要不利预后因素。因此,他们随后通过高通量测序分析了 PBMC 中的免疫球蛋白 G (IgG) 重链库。

图1:肿瘤标志物预后研究报告建议 (REMARK) 图。该图详细说明了本研究中的患者是如何从 MIMOGA 研究中的患者中选择的。IgG,免疫球蛋白G;MIMOGA,监测成人 T 细胞白血病-淋巴瘤患者接受含莫加珠单抗治疗后的免疫反应;PBMC,外周血单个核细胞。

在参加 MIMOGA 研究的 101 名患者中,有 81 名有足够数量的 PBMC RNA 可用于库序列分析。与健康个体相比,ATL 患者的外周 IgG B 细胞具有有限的库。IgG 库的香农-韦弗多样性指数 (SWDI) 与患者 PBMC 中 B 细胞的比例呈显着正相关。

图2:外周血单核细胞 (PBMC) 中免疫球蛋白 G (IgG) 重链库的三维图形表示。的X轴(宽度)和ÿ -轴(深度)表示V和J基因,分别。所述ž -轴(高度)表示第V-J的组合的频率。频率的总和是 100%。成人 T 细胞白血病-淋巴瘤 (ATL) 患者 PBMC 中的 IgG 重链库,Shannon-Weaver 多样性指数 (SWDI) 最高 (SWDI = 10·13; A),大约第 30 (5· 73;B)、大约第 50 个 (5·25;C) 和大约第 70 个 (3·53;D) 个百分位数,按降序排列,以及最低百分位数 (1·02;E) 中的百分位数。

图3:成人 T 细胞白血病-淋巴瘤 (ATL) 患者的总生存期 (OS)。(A) 所有参加研究的 ATL 患者的 OS。(B) 免疫球蛋白 G (IgG) 重链库 (<5·38) 的香农-韦弗多样性指数 (SWDI) 较低的患者的 OS 往往比 SWDI 较高 (≥5·38) 的患者差;中位 OS 13·2 与 19·7 个月;P  = 0·122)。(C) 具有较低 SWDI 和较低百分比的淋巴细胞内CD2 - CD19 + B 细胞 (≤0·15%) 的患者的 OS 显着低于其他患者(中位 OS,7·2 与 18·8 个月) ; P  = 0·004)。

多变量分析确定了两个显着影响 OS 的变量:较高的血清可溶性白细胞介素 2 受体水平,以及较低的 IgG 库的 SWDI [风险比,2·124;95% 置信区间,1·114–4·049;n  = 44]。

该研究表明,PBMC 中较低的 IgG B 细胞多样性,尤其是与较低百分比的 CD2 - CD19 + B 细胞一起,是一个独立的不利预后因素。目前的观察结果强调了体液免疫反应对接受含 mogamulizumab 治疗的 ATL 患者临床结果的重要性。总的来说,有必要进一步研究增强 ATL 患者体液免疫反应的策略。

原始出处:

Nosaka K, Kusumoto S, Nakano N, Choi I, Yoshimitsu M, Imaizumi Y, Hidaka M, Sasaki H, Makiyama J, Ohtsuka E, Jo T, Ogata M, Ito A, Yonekura K, Tatetsu H, Kato T, Kawakita T, Suehiro Y, Ishitsuka K, Iida S, Matsutani T, Utsunomiya A, Ueda R, Ishida T. Clinical significance of the immunoglobulin G heavy-chain repertoire in peripheral blood mononuclear cells of adult T-cell leukaemia-lymphoma patients receiving mogamulizumab. Br J Haematol. 2021 Oct 10. doi: 10.1111/bjh.17895. Epub ahead of print. PMID: 34632569.

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