Objective To investigate whether glomerular density （GD） could be an independent prognostic factor for patients of IgA nephropathy with estimated glomerular filtration rate （eGFR） of 30 to 60 ml/min per 1.73 m2, or for patients with time-average proteinuria 〈 0.5 g/d. Methods A total of 173 patients with biopsy-confirmed IgA nephropathy diagnosed from January 2000 to December 2010 were included. All of these patients were followed up for more than 5 years. The endpoint was a 〉 30% of decline in eGFR from baseline after 5-year follow-up. The optimal cut-off value of GD was calculated by ROC curve. Kaplan-Meier method and Cox regression analysis was used for survival analysis. Results A 30% of decline in eGFR occurred in 14.5% of all patients. The optimal diagnostic cut-off value of GD was 1.99/mm2 （AUC = 0.90, sensitivity = 84.0%, specificity = 81.8%） determined by ROC curve. The low GD group （GD 〈 1.99 per mm2） experienced a significant increase in renal endpoint for patients with eGFR of 30 to 60 ml/min per 1.73 m2 （six patients in lower GD group, while one patient in the other group）. For patients with time-average proteinuria 〈 0.5 g/d, the lower GD group showed a higher eGFR decline from baseline （4.5±16.7 ml/min per 1.73 m2 vs. –8.1±21.4 ml/min per 1.73 m2, P = 0.038）; two patients in this group reached the endpoint, while no patients in the higher GD group did. Conclusion GD could be an independent prognostic factor for patients of IgA nephropathy with eGFR at 30 to 60 ml/min per 1.73 m2 of body surface, particularly for those with time-averaged amount of urine protein less than 0.5 g per day.
目的观察抗磷脂抗体相关性肾病(APLN)慢性肾组织病理损伤患者有别于狼疮性肾炎的临床特征。方法回顾性分析北京协和医院2000年后196例狼疮性肾炎患者的临床特点及预后。分为对照组:APL阴性且无APLN肾组织病理损伤(119例);研究组:合并APLN慢性肾组织病理损伤狼疮性肾炎患者(39例)。另38例为APL阴性合并APLN慢性损伤样病变患者。结果研究组与对照组患者的血压为138±29/85±19 vs 96±17 mmHg,肾活检时血肌酐为99±39 vs 91±42μmol/L,估算的肾小球滤过率(eGFR)为72.7±30.0 vs 87.8±24.0 mL/min.1.73 m2。随诊2年时血肌酐为93±26 vs 80±18μmol/L。研究组的血压(包括收缩压、平均动脉压)较对照组更高、eGFR更低。两因素重复测量方差分析表明,随诊2年后研究组患者的血肌酐改善程度明显差于对照组(P<0.05)。结论合并APLN慢性损伤的狼疮性肾炎患者的血压更高,eGFR更低,肾脏预后较差。
