实用医学杂志 ›› 2025, Vol. 41 ›› Issue (6): 790-799.doi: 10.3969/j.issn.1006-5725.2025.06.003

• 基础研究 • 上一篇    

周细胞脱失与神经精神性狼疮血瘀证目征和血脑屏障功能障碍的相关性

李建斌,吴锐()   

  1. 南昌大学第一附属医院风湿免疫科 (江西 南昌 330006 )
  • 收稿日期:2024-10-16 出版日期:2025-03-25 发布日期:2025-03-31
  • 通讯作者: 吴锐 E-mail:ndyfy00400@ncu.edu.cn
  • 基金资助:
    国家自然科学基金项目(82260898)

Correlation study on pericyte depletion, eye⁃signs in blood stasis syndrome, and blood⁃brain barrier dysfunction in neuropsychiatric systemic lupus erythematosus

Jianbin LI,Rui. WU()   

  1. Department of Rheumatology and Immunology,the First Affiliated Hospital of Nanchang University,Nanchang 330006,Jiangxi,China
  • Received:2024-10-16 Online:2025-03-25 Published:2025-03-31
  • Contact: Rui. WU E-mail:ndyfy00400@ncu.edu.cn

摘要:

目的 探讨周细胞脱失在神经精神性狼疮(NPSLE)中的病理作用及其分子机制,并评估PDGFR-β信号通路作为NPSLE治疗的新靶点。 方法 使用8周龄雌性MRL/lpr小鼠构建NPSLE模型,筛选出表现行为异常的小鼠。通过调节PDGFR-β信号通路,使用激动剂促进周细胞增殖,或使用抑制剂抑制周细胞凋亡,评估其对血脑屏障功能、血瘀证目征、脑组织神经元及紧密连接蛋白的影响。采用伊文思蓝法(EB染色)、HE染色、尼氏染色及免疫荧光染色,分析紧密连接蛋白(Cadherin、ZO-1)、内皮细胞标记(CD31)及周细胞标记(NG2)的表达。 结果 NPSLE组小鼠表现显著的焦虑、抑郁及认知障碍。PDGFR-β抑制组小鼠血瘀证目征评分显著升高(P < 0.01),血脑屏障通透性明显增加(P < 0.001),神经元数量显著减少,紧密连接蛋白表达下降,周细胞脱失加重。相比之下,PDGFR-β激动组小鼠血瘀证目征评分显著降低(P < 0.01),周细胞脱失显著改善,紧密连接蛋白表达增加,神经元损伤减轻,血脑屏障功能恢复(P < 0.001)。免疫荧光染色进一步证实,PDGFR-β激动组在周细胞保护方面有显著改善。 结论 周细胞脱失与血脑屏障通透性增加及血瘀证目征的加重密切相关,PDGFR-β信号通路的调控可能为NPSLE治疗提供新的靶点。

关键词: 周细胞, 神经精神性狼疮, 血瘀证目征, 血脑屏障

Abstract:

Objective This study aims to investigate the pathological role and molecular mechanisms of pericyte depletion in neuropsychiatric lupus (NPSLE) and to assess the potential of the PDGFR-β signaling pathway as a novel therapeutic target for NPSLE. Methods NPSLE models were established using 8-week-old female MRL/lpr mice, from which those exhibiting abnormal behaviors were selected for further analysis. The PDGFR-β signaling pathway was modulated using an agonist to promote pericyte proliferation or an inhibitor to suppress pericyte apoptosis. The effects of these treatments on blood-brain barrier (BBB) integrity, eye-signs in blood stasis syndrome, neuronal integrity, and tight junction protein expression were evaluated. Evans blue staining, H&E staining, Nissl staining, and immunofluorescence staining were employed to assess the expression of tight junction proteins (Cadherin, ZO-1), endothelial cell markers (CD31), and pericyte markers (NG2). Results Mice in the NPSLE group exhibited significant anxiety, depression, and cognitive impairment. In the PDGFR-β inhibition group, eye-signs in blood stasis syndrome scores were significantly elevated (P < 0.01), BBB permeability was markedly increased (P < 0.001), neuronal numbers were significantly reduced, tight junction protein expression was diminished, and pericyte depletion was aggravated. Conversely, the PDGFR-β agonist group showed a significant reduction in eye-signs in blood stasis syndrome scores (P < 0.01), improved pericyte survival, enhanced expression of tight junction proteins, reduced neuronal damage, and restoration of BBB function (P < 0.001). Immunofluorescence staining further confirmed that PDGFR-β activation significantly protected pericytes. Conclusions Pericyte depletion is closely associated with increased BBB permeability and exacerbation of eye-signs in blood stasis syndrome. Modulation of the PDGFR-β signaling pathway may provide a promising therapeutic strategy for NPSLE.

Key words: pericytes, neuropsychiatric systemic lupus erythematosus, eye-signs in blood stasis syndrome, blood-brain barrier

中图分类号: