肝脏中PD-1表达的增加与PD-1-抗体诱导的肝毒性有关
Miro Saarela1, Essi Parviainen1,2, Ana Lleo3,4
1Department of Oncology and Hematology, Oulu University Hospital, Oulu, Finland.
BMC immunology
|January 23, 2025
概括
从检查点抑制剂中消失的胆管综合征 (VBDS) 涉及肝脏免疫细胞的增加,而不是直接的药物毒性. 这种免疫反应不同于其他肝脏疾病,如NASH和PBC.
科学领域:
- 免疫学 免疫学 免疫学
- 肝病学 肝病学是一种肝病学.
- 在瘤学瘤学.
背景情况:
- 消亡胆道综合征 (VBDS) 是一种严重的药物诱导的肝损伤,其特征是慢性胆固醇和胆道损失.
- 在检查点抑制剂 (ICI) 治疗后观察到VBDS.
- 了解ICI诱导的肝损伤背后的免疫机制至关重要.
研究的目的:
- 为了比较ICI治疗后VBDS或肝毒性患者肝活检中的免疫细胞透物.
- 研究在ICI诱导的肝损伤中PD-1和PD-L1的表达.
- 评估 pembrolizumab 对肝脏内胆道上皮细胞的直接作用.
主要方法:
- 对肝脏活检进行分析,以检测CD3+,CD4+,CD8+,CD20+,CD57+,PD-1+和PD-L1+淋巴细胞透物.
- 对ICI治疗患者 (VBDS或肝毒性) 与对照组 (正常肝脏,NASH,PBC和ICI治疗没有不良事件) 的比较.
- 在体外研究pembrolizumab对人类初级肝内胆道上皮细胞 (HIBEpiC) 的作用.
主要成果:
- 与正常肝脏和其他组相比,ICI治疗的患者显示CD3 +,PD-L1 +,CD4 +和CD8 +透率显著更高.
- 在患有严重肝脏不良事件的患者中,PD-1+透率显著增加.
- 与正常肝脏,NASH和PBC组相比,ICI治疗的患者中CD57+透率明显升高.
- 在体外,尽管PD-L1表达,但 pembrolizumab 没有影响 HIBEpiC 的活力.
结论:
- 检查点抑制剂诱导的VBDS不是由于药物的直接细胞毒性引起的.
- 在ICI诱导的肝损伤中,免疫反应与其他胆固醇性肝病不同.
- 在非癌性肝组织中PD-1,PD-L1和CD57+细胞的上调可能与ICI诱导的肝毒性有关.
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