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饮食治疗对以蛋白尿为主的原发性肾小球疾病的疗效
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摘要
目的:评价饮食治疗对原发性肾小球疾病(CKD1-2期)的疗效及安全性
     方法:按照入选及排除标准选取于大连医科大学附属一院肾内科门诊及病房就诊的CKD1-2期的30例原发性肾小球疾病患者,随机分为2组:低蛋白饮食组(LPD group:18例,给予饮食蛋白摄入量0.7g/kg/d并服用a-酮酸片0.09g/kg/d);正常蛋白饮食组(NPD group:12例,饮食蛋白摄入量1.0g/kg/d)。随访12个月,动态观察血肌酐、eGFR.尿蛋白定量、血清白蛋白(Alb)、前白蛋白(PAB)、转铁蛋白(TRF)、胆固醇(TC)、甘油三脂(TG)、低密度脂蛋白(LDL)、体重指数(BMI)、上臂围、腰围等指标变化,随访结束后通过以上相关指标评价临床疗效(包括完全缓解、部分缓解及未缓解)以及营养状态。随访终点包括:治疗后达完全缓解;血肌酐值倍增或eGFR<30ml/min.1.73m-2;患者死亡。结果采用SPSS 16.0统计学软件进行统计分析,计量资料用均数±标准差(x±s)表示,计数资料采用χ2检验,计量资料采用t检验。
     结果:30例患者随访4-12个月不等(平均随访9个月)。随访结束时两组共有12例达到完全缓解(LPD组9例,NPD组3例),无其他终点事件发生。LPD组完全缓解率为50%,总缓解率89%;NPD组完全缓解率25%,总缓解率67%,两组之间比较无显著差异(p>0.05)。LPD组血肌酐水平在9个月(75.60±16.09μml/l)、12个月(72.84±15.21μml/l)时较基础值(89.27±11.18μmol/l)明显下降,与NPD组相比,有显著差异(p<0.05)。LPD组eGFR较治疗前明显上升,在9个月(94.51±25.43ml/min·1.73m-2)、12个月(101.55±23.65ml/min·1.73m-2)时升高显著,与NPD组相比有显著差异(p<0.05)。LPD组尿蛋白水平在3个月(3955.80±2521.23 mg/d)、6个月(2102.334±1050.34 mg/d)、9个月(1568.95±664.33mg/d)和12个月(985.63±717.65mg/d)时较基线值(5121.00±2486.09mg/d)均有明显下降(p<0.05),与NPD组比较6、9、12个月时,差异有统计学意义(p<0.05)。LPD组治疗后血清白蛋白水平明显上升,在6个月(38.54.4±6.93 g/l)、9个月(42.47±6.71 g/l)、12个月(43.55±7.36 g/l)时与NPD组比较,有显著差异(p<0.05);LPD组前白蛋白、转铁蛋白水平较治疗前呈轻度上升趋势,与NPD组相比,无显著差异(p>0.05)。LPD组胆固醇、甘油三脂、低密度脂蛋白水平较治疗前均有不同程度下降,在9、12个月时胆固醇和低密度脂蛋白下降明显,与NPD组比较有统计学差异(p<0.05);治疗前后两组患者BMI、上臂围、腰围均无明显变化。
     结论:低蛋白饮食联合酮酸治疗可显著减少原发性肾小球疾病的蛋白尿水平,改善肾脏功能,同时维持良好的营养状态。
Objects:To evaluate the efficacy and safety of dietary intervention in patients with primary glomerular diseases.
     Methods:Total 30 patients with dominant proteinuria caused by primary glomerular diseases (CKD1-2) were enrolled from Nephrology Department of the First Affiliated Hospital of Dalian Medical University between July 2008 and February 2010. They were randomly assigned to LPD group (dietary protein intake 0.7g/kg/day+ketoacids 0.09g/kg/d) or NPD group (dietary protein intake 1.Og/kg/day). Follow up for 12 months. Serum creatinine, eGFR, urinary protein excretion,serum albumin, prealbumin, transferrin, cholesterol, triglyceride, low-density lipoprotein cholesterol and anthropometric index (BMI, waistline, mid-arm circumference) were tested during the follow-up period. End points included doubling of the serum creatinine concentration, eGFR<30 ml/min·1.73m-2, death and complete remission. All analyses were carried out with SPSS 16.0 statistical software, the results are presented as mean±SD. Chi-square test and t-test were used respectively for numeration and measurement data. p<0.05 was considered statistically significant.
     Results:The mean follow-up was 9 months (range 4 to 12 months).Total 12 patients were complete remission (LPD 9 and NPD 3) without other end points. The entire remission rate were 89% in LPD and 67% in NPD, while complete remission rate were 50% and 25% respectively, with no significant difference between groups (p>0.05). Serum creatinine declined significantly from the 9th month in group LPD (75.60±16.09 at the 9th month,72.84±15.21 at the 12th month, p<0.05). A significant increase in eGFR was observed in LPD (p<0.05). Urinary protein excretion started to decline significantly from the 3th month (3955.80±2521.23 mg/d) in group LPD, and a statistically significant difference was found between groups (2102.33±1050.34mg/d at the 6th month,1568.95±664.33mg/d at the 9th month, 985.63±717.65mg/d at the 12th month,p<0.05). Serum albumin increased significantly from baseline in LPD (p<0.05), but not in NPD. Cholesterol and low-density lipoprotein cholesterol declined significantly form the 9th month, while it remained in NPD (p<0.05). No statistically significant difference was found between groups in prealbumin, transferrin and anthropometric index (BMI, waistline, mid-arm circumference) (p>0.05).
     Conclusion:Low protein diet with Keto acids have benefit effects on reducing proteinuria, improving renal function and maintaining nutritional status.
引文
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