目的:比较镜检法和尿液分析仪检测白细胞的差异。 方法: 用两种方法测定900例尿液标本中的白细胞,并对其结果进行比较分析。结果:两种方法检测结果有明显差异(Plt;005),以镜检法为标准,尿液分析仪检测白细胞假阳性率为169%,假阴性率为158%。结论: 检测尿液白细胞时镜检法和尿液分析仪尽量结合应用,以减少假阴性率和假阳性率,保证检验结果的准确性。
目的 对尿液特征组分与糖尿病早期肾损害的关系进行了初步探索。 方法 对2011年12月－2012年5月间28例2型糖尿病组、33例2型糖尿病肾病组及26例健康对照组尿液中尿蛋白含量和几种常见非蛋白氮物质，包括肌酸、尿囊素、肌酐、尿酸和假尿嘧啶核苷的浓度进行测定，采用多种归一化方法对数据进行对比分析，并通过t检验减少高效液相色谱测定的变量信息，保留P＜0.05的检出峰进行主成分分析，获得分类结果。 结果 采用体积归一化方法，发现健康对照组尿液中肌酸、尿囊素和尿酸的含量与2型糖尿病组和糖尿病肾病组相比，差异均有统计学意义（P＜0.05），2型糖尿病组尿液中尿蛋白的浓度与糖尿病肾病组相比，差异有统计学意义（P＜0.05）。 结论 通过肌酸、尿囊素、尿酸和尿蛋白的联合测定为肾脏损伤程度的监测及疗效观察提供依据，为2型糖尿病患者肾功能损坏的早期预防与诊断进行初步判断提供了新的方法。
目的：测定妊娠期肝内胆汁淤积症(ICP)患者血清及尿液的胆汁酸水平，探讨ICP时母体胆汁酸转运的变化及意义。方法：ICP患者(ICP组)及正常妊娠(对照组)各20例。血清及尿液总胆汁酸测定采用速率法。结果：(1)ICP组与对照组相比，血清及尿液中总胆汁酸水平均明显升高，差异有显著性(Plt;0.05)；(2)对照组尿液总胆汁酸水平明显高于血清，差异有显著性(Plt;0.05)，而ICP组血清和尿液总胆汁酸水平无显著性差异(Pgt;0.05)；(3)两组中血清与尿液总胆汁酸水平均无相关性(Pgt;0.05)。结论：ICP患者母血中总胆汁酸水平明显增加，而总胆汁酸经尿液的排泄未成比例增加，这可加重胆汁淤积，引起围产儿不良结局。
A new urine analysis core module based on high performance 32-bit microprocessor and high precision color sensor was presented. A novel optical structure and a specific circuit were applied to improve measurement precision and temperature was used to compensate for results in this core module. The information of urine test peice, such as all original data and color RGB value, reflectivity, semi-quantitative level, etc. can be output. The results showed that the measuring precision was about 95% or above with ideal stability and reliability using this presented core module, which can be conveniently applied in various urine analyzers, and can greatly decrease the cost of urine analyzers in development and production.
ObjectiveTo review the current progresses in purification strategies, biological characters, and the uses in tissue engineering of urine-derived stem cells (USCs). MethodsRecent relevant publications on the USCs were extensively reviewed, analyzed, and summarized. ResultsUSCs, usually isolated by adherence screening method, are a population of mesenchymal stem cells (MSCs)-like somatic stem cells possessing robust self-renew and multi-potential differentiation ability. Combined with using appropriate biomaterials and biological molecules, USCs can be used as a good cell source for tissue engineering. ConclusionAn alluring prospect exists on the USCs-related research. Further studies are required to investigate the origin, individual differences, and the therapeutic values of USCs.
Objective To explore the effects of human urine-derived stem cells (hUSCs) and hUSCs combined with chondroitinase ABC (chABC) on the expressions of nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) in the spinal cord injury (SCI) of rats, and to investigate the underlying mechanism. Methods hUSCs were cultured from human urine, and their phenotypes were detected by flow cytometry. The SCI model of rats were made via Allen method. Sixty Sprague Dawley rats were divided into 5 groups (n=12): the sham operation group (group A), SCI group (group B), SCI+hUSCs group (group C), SCI+chABC group (group D), and SCI+hUSCs+chABC group (group E). Basso, Beattie, Bresnahan (BBB) score was used to measure the lower extremity motor function of rats in each group at 10, 20, and 30 days after operation. Real-time fluorescent quantitative PCR was used to detect the relative mRNA expressions of NGF and BDNF at 30 days. Meanwhile, the protein expression of NGF and BDNF were confirmed by immunohistochemistry staining. The relative protein expressions of Bax and Bcl-2 were detected by Western blot. Results The hUSCs were identified to have multipotential differentiation potential. At 10, 20, and 30 days, BBB score was significantly lower in group B than in groups A, C, D, and E, in groups C, D, and E than in group A, in groups C and D than in group E (P<0.05). Real-time fluorescent quantitative PCR and immunohistochemistry staining demonstrated that the expressions of NGF and BDNF were significantly lower in group B than in groups A, C, D, and E, in groups C, D, and E than in group A, in groups C and D than in group E (P<0.05); but there was no significant difference between groups C and D (P>0.05). Western blot results indicated that the protein expression of Bax was significantly higher in group B than in groups A, C, D, and E, in groups C, D, and E than in group A, in groups C and D than in group E (P<0.05). Meanwhile, the protein expression of Bcl-2 was significantly lower in group B than in groups A, C, D, and E, in groups C, D, and E than in group A, in groups C and D than in group E (P<0.05). Conclusion hUSCs can protect SCI and this positive effect can be enhanced by chABC; this neuro-protective effect may depend on promoting the expressions of NGF and BDNF, and suppressing the neuronal apoptosis.
Objective To investigate the clinical application value of GeneXpert Mycobacterium tuberculosis (MTB)/ rifampin (RIF) in urine samples for tuberculosis diagnosis. Methods The patients with clinically highly suspected tuberculosis admitted to West China Hospital of Sichuan University between January 1, 2018 and June 1, 2023 were selected retrospectively. The diagnostic efficacy of urine GeneXpert MTB/RIF detection, such as sensitivity, specificity, positive predictive value, and negative predictive value, were retrospectively analyzed to evaluate its clinical value in the diagnosis of tuberculosis. Correlation analysis was further conducted to explore the correlation between positive levels of GeneXpert MTB/RIF in urine samples and laboratory test indicators. Results A total of 400 patients were included. Among them, 163 cases were in the clinical tuberculosis group and 237 cases were in the clinical non tuberculosis group. In the clinical tuberculosis group, 112 cases were urogenital tuberculosis patients and 51 cases were non-urogenital tuberculosis patients. The sensitivity, specificity, positive predictive value, and negative predictive value of urine GeneXpert MTB/RIF in the diagnosis of tuberculosis were 55.2%, 97.5%, 93.8% and 76.0%, respectively. The sensitivity, specificity, positive predictive value, and negative predictive value of urine GeneXpert MTB/RIF in the diagnosis of urogenital tuberculosis were 65.2%, 92.0%, 76.0% and 87.2%, respectively, and the diagnostic sensitivity was further improved. Correlation analysis showed that the positive degree of urine GeneXpert MTB/RIF was correlated with the levels of hemoglobin, serum total protein, blood serum albumin, and other indicators. Conclusions Urine GeneXpert MTB/RIF detection offers high sensitivity and specificity in the diagnosis of tuberculosis, especially in urogenital tuberculosis, which is helpful for the early and rapid diagnosis of tuberculosis patients. The positive degree reported by the GeneXpert MTB/RIF in urine may indicate disease severity.