A&R: B细胞耗竭通过抑制系统性硬化症小鼠模型中的促纤维化巨噬细胞分化来抑制纤维化

2021-12-09 MedSci原创 MedSci原创

这项研究是为了探索B细胞耗竭对系统性硬化症 (SSc) 纤维化的影响及其作用机制。

      目的:系统性硬化症 (SSc) 是一种自身免疫性疾病,主要由3种病理表现组成:纤维化、血管病变和自身免疫异常。这项研究是为了探索B细胞耗竭对SSc纤维化的影响及其作用机制。

      方法用抗CD20抗体治疗博来霉素诱导的SSc (BLM-SSc)小鼠,并对皮肤和肺纤维化进行组织病理学评估。T细胞和巨噬细胞与B细胞共培养,并通过流式细胞术评估B细胞对其分化的影响。研究者还共培养了SSc患者的B细胞和单核细胞,并分析了B细胞诱导纤维化和促纤维化巨噬细胞之间的相关性。

     结果:B细胞耗竭抑制了BLM-SSc小鼠的纤维化。来自BLM-SSc小鼠的B细胞在共培养中增加了产生促炎细胞因子的T细胞。BLM-SSc小鼠中,BLM治疗前的B细胞耗竭(耗竭前)比BLM治疗后的B细胞耗竭(耗竭后)对纤维化的抑制作用更强(P < 0.01)。然而,耗竭后组的促炎T细胞频率低于耗竭前组。这种差异表明B细胞耗竭对纤维化的影响不能用其对T细胞分化的影响来解释。另一方面,与消耗后组相比,消耗前组的促纤维化巨噬细胞显著减少(P < 0.05)。此外,来自BLM-SSc小鼠的B细胞增加了共培养中的促纤维化巨噬细胞分化(P < 0.05SSc患者中,B细胞诱导的促纤维化巨噬细胞程度与纤维化的严重程度相关(P < 0.0005)。

     结论这些发现表明B细胞耗竭通过抑制BLM-SSc小鼠的促纤维化巨噬细胞分化来抑制组织纤维化,为SScB细胞耗竭治疗提供了新的理论基础。

出处

Numajiri, H., Kuzumi, A., Fukasawa, T., et al. (2021), B Cell Depletion Inhibits Fibrosis via Suppression of Profibrotic Macrophage Differentiation in a Mouse Model of Systemic Sclerosis. Arthritis Rheumatol, 73: 2086-2095. https://doi.org/10.1002/art.41798

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    2021-12-09 1244c0ebm28暂无昵称

    好好玩

    0

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系统性硬化症 (SSc) 是一种自身免疫性疾病,其特征是皮肤和内脏器官的血管损伤和纤维化。明显或亚临床的心肺受累在 SSc 中很常见。

ARD:单细胞转录组分析可识别系统性硬化症中的皮肤特异性T细胞反应

尽管T细胞与系统性硬化症(SSc)的发病机制有关,但缺乏对进行性SSc患者受影响皮肤中T细胞介导的免疫反应的综合研究。该研究对SSc皮肤活检进行基于液滴的单细胞转录组分析。