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CD19 靶向免疫治疗中复发性 CD19(-) B-ALL 的临床病理特征:对复发的生物学见解及 LILRB1 作为 CD19(-) B 淋巴母细胞的新型 B 细胞标志物

英文原题:Clinicopathologic features of relapsed CD19(-) B-ALL in CD19-targeted immunotherapy: Biological insights into relapse and LILRB1 as a novel B-cell marker for CD19(-) B lymphoblasts.

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Clinicopathologic features of relapsed CD19(-) B-ALL in CD19-targeted immunotherapy: Biological insights into relapse and LILRB1 as a novel B-cell marker for CD19(-) B lymphoblasts.

PubMed 2024/01/04(内容时间) Int J Lab Hematol Q3 · IF 2.2(JCR 2025)

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研究概要

LILRB1 可作为新型 B 细胞标志物,用于识别 CD19(-) B 淋巴母细胞。CD19(-) B-ALL 的出现似乎与复杂的细胞遗传学进化相关。在抗 CD19 免疫压力下 CD19(-) B-ALL 复发的机制仍有待通过全面的分子研究加以探索。

研究思路结论见上方概要

复发的CD19(-) B-ALL在抗CD19免疫治疗(Kymriah [CART-19]和blinatumomab)后的机制正在积极研究中。我们的研究旨在评估LILRB1作为一种新型B细胞标志物,用于检测CD19(-) B淋巴母细胞,并分析此类疾病的临床病理/遗传学特征,为复发提供生物学见解。

对6例复发性CD19(-) B-ALL患者(3男/3女,中位年龄14岁)进行了细胞遗传学/遗传学特征和免疫表型分析。

CD19(-) B-ALL 在抗 CD19 治疗后间隔 5.8 个月出现。六名患者中有五名出现 B 细胞发育不全,表明复发时 CAR-T 或 blinatumomab 持续存在效应。重要的是,LILRB1 在 CD19(-) 和 CD19(+) B 淋巴母细胞上表达不一,在 CD34(+) 淋巴母细胞上强表达,在 CD34(-) 淋巴母细胞上弱/部分表达。六名具有配对 B-ALL 样本(抗 CD19 治疗前后)的患者中有三名携带复杂且不同的细胞遗传学异常,要么完全不同,要么共享一部分细胞遗传学异常。

展开英文摘要原文

Six patients (3 males/3 females, median age of 14 years) with relapsed CD19(-) B-ALL were analyzed for cytogenetic/genetic profile and immunophenotype.

CD19(-) B-ALL emerged after an interval of 5.8 months following anti-CD19 therapy. Five of six patients had B-cell aplasia, indicative of a persistent effect of CART or blinatumomab at relapse. Importantly, LILRB1 was variably expressed on CD19(-) and CD19(+) B lymphoblasts, strong on CD34(+) lymphoblasts and dim/partial on CD34(-) lymphoblasts. Three of six patients with paired B-ALL samples (pre- and post-anti-CD19 therapy) carried complex and different cytogenetic abnormalities, either as completely different or sharing a subset of cytogenetic abnormalities.

LILRB1 can be used as a novel B-cell marker to identify CD19(-) B lymphoblasts. The emergence of CD19(-) B-ALL appears to be associated with complex cytogenetic evolutions. The mechanism of CD19(-) B-ALL relapse under anti-CD19 immune pressure remains to be explored by comprehensive molecular studies.

论文信息

作者
Chen D、Fuda F、Rosado F、Saumell S、John S、Chen M、Koduru P、Chen W
单位
Department of Pathology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.United States
期刊
International journal of laboratory hematology2024 Jun
原文标识
PubMed 38177979 · DOI 10.1111/ijlh.14226