二肽基肽酶4抑制剂在控制2型糖尿病透析患者代谢指标中的作用

目的：研究3种不同二肽基肽酶4（DPP-4）抑制剂对终末期肾病合并2型糖尿病患者代谢参数的影响。方法：对200例应用DPP-4抑制剂（西格列汀、维格列汀或利格列汀）治疗2型糖尿病的终末期肾病患者进行前瞻性队列研究。DPP-4抑制剂治疗12周前后评估糖化血红蛋白（HbA1c）、空腹血糖和代谢指标的变化。结果：西格列汀、维格列汀、利格列汀治疗组HbA1c水平下降无显著性差异（分别为-0.74±1.57、-0.39±1.45和-0.08±1.40，P=0.076），空腹血糖及血脂变化亦无显著差异。在血液透析患者（n=115）中，3组间HbA1c水平变化无差异。相比之下，腹膜透析患者（n=85）用西格列汀治疗12周后，HbA1c比用维格列汀和利格列汀治疗12周降低得更多（分别为-1.58±0.95，-0.46±0.98，-0.04±1.22，P=0.001）。结论：在终末期肾病患者中使用不同DPP-4抑制剂的降糖作用差异无显著性。在腹膜透析患者中，西格列汀比其他DPP-4抑制剂可使HbA1c水平降低更多。     

Clinical analysis of peritoneal dialysis in the treatment of rapidly progressive glomerulonephritis

Objective To observe the clinical characteristics and prognosis of patients with rapidly progressive glomerulonephritis (RPGN) caused by lupus nephritis, antineutrophil cytoplasmic antibodies (ANCA)-associated vasculitis, or primary glomerulonephritis who were treated with peritoneal dialysis (PD) and then withdrew PD because of renal recovery. Methods Data of the above patients were retrospectively analyzed. The patients were diagnosed as RPGN and received PD therapy in Kidney Disease Center, the First Affiliated Hospital, College of Medicine, Zhejiang University from February 2009 to August 2018. The patients were divided into early withdrawal group (PD time≤183 days, n=24) and late withdrawal group (PD time＞183 day, n=24). The differences of clinical characteristics between the two groups were compared. The cumulative incidence of adverse events in both groups was analyzed using Kaplan-Meier curves. Cox proportional hazards model was used to analyze the risk factors influencing the prognosis of patients. Results Forty-eight RPGN patients were included. The median time of maintaining PD was 178(76, 378) days. Compared with the late withdrawal group, the patients in early withdrawal group had lower levels of urine volume, serum albumin and parathyroid hormone, and lower rates of gross hematuria and hypertension at the beginning of PD, and received higher rates of methylprednisolone impulse, combined immunosuppressive agents, and hemodialysis or continuous renal replacement therapy (all P＜0.05). At the time of PD withdrawal, the levels of serum creatinine, serum calcium, serum albumin and parathyroid hormone in the early withdrawal group were significantly lower than those in the late withdrawal group (all P＜0.05). The Kaplan-Meier curves showed that there was no significant difference in the cumulative survival of patients in both groups (log-rank test χ2=3.485, P=0.062). Cox regression analysis revealed serum creatinine≥209 μmol/L at the time of PD withdrawal was an independent risk factor for poor prognosis (HR=5.253，95%CI 1.757-15.702, P=0.003). Conclusions PD can be used for RPGN patients caused by lupus nephritis, ANCA-associated vasculitis and primary nephritis. Serum creatinine≥209 μmol/L at the time of PD withdrawal is an independent risk factor for poor prognosis.     

腹膜透析患者并发胸腹瘘5例分析

目的探讨腹膜透析患者并发胸腹瘘的临床表现、诊断方法及治疗与转归。方法对2011年1月—2014年12月收治的腹膜透析并发胸腹瘘患者5例的临床表现、诊断方法及治疗与转归进行分析。结果 5例患者均出现胸闷、气促;影像学检查提示中~大量右侧胸腔积液;胸水透明清亮,蛋白定性试验阴性,胸水蛋白定量<25g/L,葡萄糖>40 mmol/L,美蓝试验阳性,DPTA试验阳性。确诊后经抽取胸水、暂停持续非卧床腹膜透析,其中4例患者最终转为血液透析治疗,1例改为间歇性腹膜透析,瘘口愈合后再行维持性腹膜透析。结论胸腹瘘有胸腔负压消失的临床特点,用美蓝试验及核素扫描结合胸水生化成分分析诊断胸腹瘘敏感性高,不良反应少。出现胸腹瘘后患者大多转为维持性血液透析,较难再维持腹膜透析治疗。     

Different expression levels of exosomal miR-503 in peritoneal dialysis effluent from patients of different peritoneal transport characteristics and bioinformatics analysis

Objective To compare the expression level of exosomal miR-503 in peritoneal dialysis effluent (PDE) from patients of different peritoneal transport characteristics, predict the target genes of miR-503 and provide bioinformatic data for researches of peritoneal transport characteristics. Methods Twenty-four stable peritoneal dialysis (PD) patients were selected and divided into high transport group (H group, n=12) and low transport group (L group, n=12) according to the results of peritoneal equilibration tests (PET). The 500 ml PDE that was left on the patient's abdomen overnight was collected and concentrated using ultrafiltration cell. Exosomes in PDE were resuspended in phosphate buffered saline (PBS) after ultracentrifugation and the characteristics of PDE exosomes were identified by transmission electron microscope (TEM), nanoparticle tracking analysis (NTA), Western blotting and fluorescent staining. MicroRNAs were extracted from PDE exosomes. The expression levels of PDE exosomal miR-503 in the two groups were detected by quantitative real-time PCR. Then the relations between the relative quantity of PDE exosomal miR-503 and PET values or 24 h ultrafiltration volume (UF) were analyzed. Targetscan and miRDB databases were used to predict the target genes of miR-503. Gene ontology (GO) functional enrichment and Kyoto encyclopedia of genes and genomes (KEGG) signaling pathway analysis were relied on DAVID (https://david.ncifcrf.gov/). Results The exosomes in PDE showed a round and cup-shaped morphology under TEM, and the diameters were approximately 100 nm measured by NTA. The specific biomarkers of exosomes, CD63, CD81 and heat shock protein -70 (HSP-70) were all detected by Western blotting. The internalization and uptake of the exosomes was observed after fluorescent staining. The relative expression level of PDE exosomal miR-503 in H group was found to be significantly higher than that in L group (P=0.002), and the relative quantity of PDE exosomal miR-503 was significantly positively correlated with PET values (r=0.547, P=0.006), but not 24 h UF (r=-0.297, P=0.159). There were 156 target genes of miR-503 in total that could be predicted by two different databases at the same time. GO analysis of these 156 target genes was mainly focused on kinase binding, regulation of protein modification and catabolic process as well as regulation of epithelial cell proliferation. KEGG enriched many tumor associated or classical signaling pathways, including transforming growth factor-β (TGF-β) signaling pathway and vascular endothelial growth factor (VEGF) signaling pathway. The prediction showed that vascular endothelial growth factor A (VEGFA) was a direct target gene of miR-503 and it was also related to many proteins involved in fibrosis mechanism. Conclusions The expression level of PDE exosomal miR-503 is significantly higher in H group, and positively correlates with PET values, which may regulate the angiogenesis of peritoneal vessels by targeting VEGFA.     

间歇性腹膜透析治疗尿毒症脑病的疗效观察

目的 探讨间歇性腹膜透析对长期维持腹膜透析患者尿毒症脑病的治疗效果。方法 选择2013年1月-2018年12月本院肾内科长期维持腹膜透析出现尿毒症脑病患者46 例,并随机分为持续性不卧床腹膜透析(Continuous ambulatory peritoneal dialysis,CAPD)组及间歇性腹膜透析(Intermittent peritoneal dialysis,IPD)组,在治疗前及治疗7 d后分别采血进行血肌酐(Scr)、尿素氮(BUN)、甲状旁腺激素(iPTH)、白细胞介素6(IL-6)、β2微球蛋白(β2-MG)、超敏C反应蛋白(CRP)水平的检测,采用阳性与阴性症状量表评分表(PAN - SS)评价患者的疗效。结果 CAPD组治疗后血BUN、Scr、iPTH、IL-6、β2-MG、CRP水平与治疗前比较无明显变化(P>0.05); IPD组治疗后血BUN、Scr水平与治疗前比较无明显变化(P>0.05),而iPTH、IL-6、β2-MG、CRP水平较治疗前明显下降(P<0.05); 治疗后IPD组iPTH、IL-6、β2-MG、CRP水平与CAPD组比较有明显差异(P<0.05); PAN-SS显示,IPD组与CAPD组阳性症状、阴性症状、一般精神症状等方面均有明显差异(P<0.05); CAPD组无效8例,好转12例,显著进步4例,基本痊愈2例; IPD组无效2例,好转14例,显著进步5例,基本痊愈5例。结论 规律腹膜透析患者出现尿毒症脑病时应用间歇性腹膜透析治疗效果优于持续不卧床腹膜透析     

Peritonitis esclerosante encapsulante: hallazgos en imágenes de una entidad poco frecuente

ObjectivesTo describe the most characteristic imaging findings for sclerosing encapsulating peritonitis, with an emphasis on the computed tomography findings.ConclusionThe incidence of sclerosing encapsulating peritonitis is low. The pathophysiology of this condition is unclear. Two types are recognized: idiopathic and secondary; the secondary type is generally a complication of peritoneal dialysis. Its nonspecific clinical presentation and the absence of blood markers mean that sclerosing encapsulating peritonitis is usually diagnosed late. Thus, it is important to know the imaging signs; these include thickening and calcification of the peritoneum and dilation of bowel loops with thickening and calcification of bowel walls, whether in isolation or in association with loculated ascites. Although ultrasonography allows the complexity of the collections to be evaluated, computed tomography is the most useful technique for the general assessment of the signs mentioned above.