紧张性结合症经常表现在选择性淋巴瘤的瘤微环境中:针对性治疗的含义
Diane Libert1, Shuchun Zhao1, Sheren Younes1
1Departments of Pathology.
The American journal of surgical pathology
|December 27, 2023
概括
研究T细胞免疫受体与Ig和ITIM域 (TIGIT) 在淋巴瘤中的表达,揭示了不同的特征. TIGIT阻塞可能提供新的治疗途径,特别是在慢性淋巴细胞白血病/小淋巴细胞淋巴瘤和形大细胞淋巴瘤中.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 血液学 血液学 血液学
背景情况:
- 目前针对PD-1/PD-L1和CTLA-4/B7轴的免疫检查点抑制剂在血液恶性瘤中显示出有限的疗效.
- 需要替代的点,如具有Ig和ITIM域的T细胞免疫受体 (TIGIT) /CD155,以增强持久的临床反应.
- 了解TIGIT表达对于评估其在淋巴瘤中的治疗潜力至关重要.
研究的目的:
- 调查TIGIT在各种淋巴瘤亚型中的表达特征.
- 通过在淋巴瘤和瘤微环境 (TME) 细胞中绘制其表达的地图来评估TIGIT阻塞的潜在疗效.
- 为了将TME TIGIT表达与患者生存结果相关联,并与PD-L1表达进行比较.
主要方法:
- 验证了TIGIT的免疫组织化学测定.
- 在661个淋巴瘤/白血病活检中评估了TIGIT表达,包括瘤和TME细胞.
- 利用多重免疫光学与正常的TME细胞子集相关,并分析了生存数据.
主要成果:
- 淋巴瘤细胞大多是TIGIT阴性,除了血管免疫细胞瘤 (91%的阳性) 和外围T细胞淋巴瘤 (47%的阳性).
- 在小B细胞淋巴瘤和形大细胞淋巴瘤中观察到高TME TIGIT表达.
- 患有TIGIT阴性TME细胞的慢性淋巴细胞白血病/小淋巴细胞淋巴瘤患者的整体存活时间明显较短 (P=0.04).
结论:
- 在淋巴瘤亚型中,TIGIT表达表现出不同的特征.
- 无塑性大细胞淋巴瘤和慢性淋巴细胞白血病/小淋巴细胞淋巴瘤显示高TME TIGIT表达,通常与PD-L1.1共同表达.
- 这些发现支持开发针对TIGIT的向疗法,单独或与PD1/PDL1抑制剂结合,用于淋巴瘤治疗.
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