Establishment of cell free conversion system with biotin-labelled recombinant PrPsen expressed in E. coli

Objective To report a protocol using biotin-labelled PrP protein in cell free conversion assay instead of isotope. Methods A hamster PrP protein （HaPrP） was expressed in E. coli and purified with HIS-tag affinity chromatograph. After being labelled with biotin, HaPrP was mixed with PrP^sen preparation from scrapie strain 263K. Results Protease-resistant bands were detected after four-day incubation. Conclusion The new conversion model provides a reliable, easily handling, and environment-friendly method for studies of prion and transmissible spongiform encephalopathies.     

Inverted U-Shaped Associations between Glycemic Indices and Serum Uric Acid Levels in the General Chinese Population: Findings from the China Cardiometabolic Disease and Cancer Cohort (4C) Study

Objective The relationship between serum uric acid(SUA)levels and glycemic indices,including plasma glucose(FPG),2-hour postload glucose(2 h-PG),and glycated hemoglobin(HbA1 c),remains inconclusive.We aimed to explore the associations between glycemic indices and SUA levels in the general Chinese population.Methods The current study was a cross-sectional analysis using the first follow-up survey data from The China Cardiometabolic Disease and Cancer Cohort Study.A total of 105,922 community-dwelling adults aged≥40 years underwent the oral glucose tolerance test and uric acid assessment.The nonlinear relationships between glycemic indices and SUA levels were explored using generalized additive models.Results A total of 30,941 men and 62,361 women were eligible for the current analysis.Generalized additive models verified the inverted U-shaped association between glycemic indices and SUA levels,but with different inflection points in men and women.The thresholds for FPG,2 h-PG,and HbA1 c for men and women were 6.5/8.0 mmol/L,11.0/14.0 mmol/L,and 6.1/6.5,respectively(SUA levels increased with increasing glycemic indices before the inflection points and then eventually decreased with further increases in the glycemic indices).Conclusion An inverted U-shaped association was observed between major glycemic indices and uric acid levels in both sexes,while the inflection points were reached earlier in men than in women.     

Full-Length Genome Sequencing of SARS-CoV-2 Directly from Clinical and Environmental Samples Based on the Multiplex Polymerase Chain Reaction Method

The new coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is spreading worldwide with the number of confirmed cases increasing dramatically[1,2]. Coronaviruses have the largest genome among RNA viruses and have caused two major outbreaks[3,4]. The new coronavirus (SARS-CoV-2) is the third coronavirus spread globally in the past 17 years. According to the World Health Organization, SARS-CoV-2 has affected more than 155.6 millon patients in 222 countries as of 6 May 2021 and has become a major global health concern (https://www.who.int/emergencies/diseases/novel-coronavirus-2019).     

A Risk Prediction Model for Ischemic Stroke in Southern Chinese Population: Impact of Multiple Genetic Variants and Clinical/Lifestyle Factors

With a global prevalence of 7.7 million, ischemic stroke (IS) is one of the leading causes of death and disability worldwide. In China, IS alone contributed to 69.6％? of stroke events and accounted for 37.1％? of the mortality/disability rate[1]. IS is a complex disease that is known to be associated?with?various?genetic?variants?and?clinical and lifestyle risk factors[2]. Genome -wide association studies (GWAS) provided evidence for the?occurrence?of?more?than?160?IS-associated?single nucleotide?polymorphisms?(SNPs).?In?terms?of?clinical risk factors, patients with a history of chronic diseases like hypertension, dyslipidemia, and diabetes mellitus, display a higher risk of developing IS. Among the various lifestyle components, leading a sedentary lifestyle, smoking, and having an unhealthy diet are known to be associated with the risk of IS. Thus, integration of various genetic, clinical, and lifestyle variables might prove to be highly beneficial in the prediction and prevention of IS?at?the?individual?level[3].     

纤维肌痛运动干预患者实践指南(2021年)

纤维肌痛发病率仅次于腰痛和骨关节炎,是第三常见的肌肉骨骼相关疾患.运动干预是纤维肌痛的主要治疗方法之一,患者如何更好地进行自我运动是提高纤维肌痛康复效果的关键因素.我们成立多学科专家和患者共同参与的纤维肌痛运动干预患者实践指南工作组,依据《世界卫生组织指南制订手册》原则和程序,筛选纤维肌痛患者关注的运动干预相关问题,提出纤维肌痛运动干预患者实践11条意见.     

两种浓度亚甲蓝注射液治疗老年人肛瘘切除术后疼痛的临床结局比较

背景 亚甲蓝作为长效镇痛剂被广泛应用于肛肠疾病中,然而关于亚甲蓝对老年肛瘘患者术后镇痛效果及肛门功能影响的研究报道甚少.目的 观察两种浓度亚甲蓝注射液对老年人肛瘘切除术后的镇痛效果.方法 选取2012年3月-2020年12月就诊于解放军总医院第一医学中心中医肛肠科的60岁以上肛瘘切除术后老年患者80例,按随机数字表法分为0.1％亚甲蓝注射液组和0.05％亚甲蓝注射液组,每组40例,患者术毕创面分别予以0.1％和0.05％亚甲蓝注射液封闭注射,观察不同时间点两组疼痛、创缘水肿、肛门坠胀、尿潴留、创面愈合时间、肛门失禁及其他不良反应.结果 0.05％亚甲蓝注射液组术后1个月肛门失禁Wexner评分低于0.1％亚甲蓝注射液组[Md(IQR):2.00(2.00,3.00)vs 3.00(2.00,4.00),P=0.009];术后3个月两组Wexner评分均降为0,差异无统计学意义(P>0.05);两组术后1 d、3 d、7 d疼痛、创缘水肿、肛门坠胀及术后尿潴留、创面愈合时间均无统计学差异(P均>0.05).结论 0.1％浓度亚甲蓝注射液与0.05％浓度亚甲蓝注射液对老年人肛瘘切除术后镇痛效果相当,但0.05％浓度亚甲蓝注射液对肛门功能的影响小,术后药物性肛门失禁风险低.     

基托粘结式上颌前方牵引器矫治乳牙期骨性反(牙合)的疗效观察

目的 观察基托粘结式上颌前方牵引器矫治乳牙期骨性前牙反(牙合)的临床疗效.方法 选取20例乳牙期骨性前牙反(牙合)的临床病例,采用基托粘结式上颌前方牵引器进行矫治,矫治前后均拍摄头颅X线侧位片,进行头影测量分析,并对测量结果进行统计学分析.结果 矫治后SNA增加(2.3±1.1)°,SNB减小(1.1±0.9)°,ANB增大(3.5±2.2)°,前牙反(牙合)全部解除;面凸角增加(4.3±2.1)°,全面凸角减小(4.8±2.6)°,患者侧貌由Ⅲ类凹面型变为直面型.结论 基托粘结式上颌前方牵引器可以有效地矫治乳牙期骨性前牙反(牙合),调整上、下颌骨间前后向的位置关系,改善患者软组织侧貌.     

Hydrogen sulfide serves as a biomarker in the anterior segment of patients with diabetic retinopathy

International Ophthalmology - The present study aims to determine hydrogen sulfide (H2S) concentrations of the aqueous humor from patients with diabetic retinopathy (DR) to compare its levels in...     

Mechanism and Site of Inhibition of AMPA Receptors: Pairing a Thiadiazole with a 2,3-Benzodiazepine Scaffold

相似文献