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BMC Nephrol:原发性干燥综合征患者肾脏组织中C4d沉积的临床意义

2020-03-02 不详 网络

在患有原发性干燥综合征(pSS)的肾功能不全的患者中,评估肾脏C4d的表达,C4d是经典/甘露糖结合凝集素(MBL)通路的补体成分。我们回顾性分析了39例患有肾功能不全的pSS患者的临床和病理数据。使用免疫组织化学法在石蜡包埋的活检组织中检查了C4d。当> 75%的肾小球整体染色时,定义为肾小球C4d阳性。肾小管间质C4d(TI-C4d)的半定量评分为0(不存在),1(斑点或薄弱),2(斑片

在患有原发性干燥综合征(pSS)的肾功能不全的患者中,评估肾脏C4d的表达,C4d是经典/甘露糖结合凝集素(MBL)通路的补体成分。

我们回顾性分析了39例患有肾功能不全的pSS患者的临床和病理数据。使用免疫组织化学法在石蜡包埋的活检组织中检查了C4d。当> 75%的肾小球整体染色时,定义为肾小球C4d阳性。肾小管间质C4d(TI-C4d)的半定量评分为0(不存在),1(斑点或薄弱),2(斑片)和3(扩散)。TI-C4d分数≥≥2被认为是TI-C4d阳性,包括在TI-C4d +组中,反之亦然。周围毛细血管(PTC)C4d的得分为0(不存在),1(0%至10%,极小),2(10%〜50%,点)和3(> 50%,弥散)。

结果显示,在所有8例与pSS相关的膜性肾病(MN)的患者中均观察到肾小球C4d沉积,而没有明显的C1q沉积。5例肾小球膜增生性肾小球肾炎患者中有2例和2例IgA肾病患者中有1例肾小球膜C4d沉积。16例患者(6例肾小球显性和10例肾小管间质性显性)的TI-C4d评分≥≥2。TI-C4d +组的患者在进行肾脏活检时表现出更高的血清肌酐水平(TI-C4d + 132.5 [89.7,165.5] vs. TI-C4d-83.0 [70.7,102.0]μmol/ L,P1 = 0.008)。在12例患者中观察到PTC C4d,在4例患者中分别观察到最小,局部和弥漫性染色。

总之,补体激活的MBL通路可能与pSS相关的MN有关。肾小管间质C4d可能是pSS相关性肾功能不全患者严重肾损伤的病理标志。

原始出处:

Wenli Xia, Bixia Gao, et al., Clinical significance of C4d deposition in renal tissues from patients with primary Sjögren’s syndrome—a preliminary study. BMC Nephrol. 2019; 20: 189. doi: 10.1186/s12882-019-1341-y

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