淋巴瘤B细胞重塑骨髓层细胞成为细胞外基质产生癌症的关联纤维细胞
Elise Dessauge1, Baptiste Brauge2, Simon Léonard3
1INSERM U1236, RENNES, France.
Blood advances
|April 30, 2025
概括
毛囊性淋巴瘤 (FL) 通过改变细胞外基质 (ECM) 和重编程树皮细胞来重塑骨髓 (BM) 微环境. 淋巴瘤和树皮细胞之间的这种交叉关系可能会导致疾病的持续性和复发.
科学领域:
- 血液学 血液学 血液学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 骨髓 (BM) 的参与在B细胞淋巴瘤中很常见,就像毛囊性淋巴瘤 (FL),影响预后.
- 之前的研究表明,在体外扩展的FL BM中介质层细胞 (MSC) 中,形状发生变化.
- 直接的B型淋巴瘤细胞和树突的局部相互作用机制尚不清楚.
研究的目的:
- 为了研究骨髓 stromal 利基重塑在毛囊性淋巴瘤的机制.
- 为了确定淋巴瘤B细胞和骨髓 stromal 利基之间的直接相互作用.
主要方法:
- 在FL患者BM和小鼠淋巴瘤异种移植模型中分析细胞外矩阵 (ECM) 组成和组织.
- 单细胞RNA测序 (scRNAseq) 用于识别细胞群及其相互作用.
- 在处理后对FL BM样本进行动力分析.
主要成果:
- 在FL患者的BM和小鼠模型中观察到显著的ECM重塑.
- 鼠瘦素受体 (LepR) 的MSCs参与与恶性B细胞的双向交叉通话.
- 恶性B细胞诱导MSC重编程向肌纤维细胞癌相关纤维细胞 (CAF) 现型.
- 治疗后,ECM和TGFb放松调节仍然存在,这表明在疾病复发中发挥了作用.
结论:
- 淋巴瘤B细胞积极重塑骨髓 stromal 利基.
- 淋巴瘤和MSC之间的双向交叉声驱动着树皮细胞重编程.
- 持续的ECM和TGFb放松调节可能会导致卵泡淋巴瘤的持续性和复发.
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