Exploration of the association between serum uric acid and testosterone in adult males: NHANES 2011–2016

BackgroundPrevious studies have suggested that the possible relationship between serum uric acid (SUA) and testosterone. However, the results of previous studies are controversial and there is limited evidence examining the relationship between SUA and testosterone in a general US population of men. The objective of this study is to explore the correlation of SUA and testosterone among adult males from the US.MethodsData from the National Health and Nutrition Examination Survey 2011–2016 were used, including a total of 7,796 male participants aged 18 years or older and excluding those lacking serum testosterone and uric acid data. Clinical characteristics of the participants among different SUA groups and testosterone groups are compared. Univariate and multivariate linear regression analyses were applied to evaluate the association between SUA and testosterone.ResultsWe found an inverse association between SUA and testosterone after fully adjusted the potential confounding factors in general US adult males. In the multivariate linear regression analysis, we found that increasing age (estimate testosterone percent difference: −0.20% per year, P<0.01), uric acid (estimate testosterone percent difference: −4.40% per md/dL, P<0.01) and BMI (estimate testosterone percent difference: −2.86% per kg/m2, P<0.01) were associated with declining serum testosterone. This association remained significant in sensitivity analysis, while in the stratified analysis, above association was not significant in men with diabetes or aged 65 and over.ConclusionsSUA levels might be negatively associated with serum testosterone in adult males.     

基于双链特异性核酸酶触发滚环扩增的microRNA-21太赫兹超材料传感方法的构建

目的:构建一种太赫兹(THz)超材料传感方法用于microRNA-21(miRNA-21)的信号放大检测。方法:首先构建THz超材料传感方法,并用聚丙烯酰胺凝胶电泳及zeta电位验证方法的可行性;对传感器检测条件进行优化之后,对不同浓度的miRNA-21以及其他不同的miRNAs进行检测,并与其他microRNA检测方法进行比较;最后,对该传感器的回收率进行了评价。结果:在最优实验条件下,通过双链特异性核酸酶(DSN)循环识别与滚环扩增(RCA)的双重信号放大策略,该THz超材料传感器对靶标miRNA-21的响应范围为10 fmol/L至10 nmol/L,检测限为8.49 fmol/L。并且该传感器具有较好的特异性,具备了从多种miRNAs中识别靶标miRNA-21的能力,并且在商业化人血清样本中的回收率可达94.33%到115.33%。结论:该THz传感器可以实现靶标miRNA-21的高灵敏、高特异性检测,具备了在miRNA相关疾病无标记诊断与早期预警的潜力。     

Vaccination with chimeric protein induces protection in murine model against ascariasis

An estimated 400 million people are infected by parasites of the genus Ascaris and the existing control measures are inefficient. Vaccine development using B cell antigens is a promising strategy for increased protection against this parasite. The present study aimed at developing a chimeric protein capable of conferring protection against infection by Ascaris sp. For this purpose, we performed B-cell epitope predictions on previously described vaccine candidate proteins from Ascaris suum and the corresponding peptides were used to construct a chimeric protein. Female BALB / c mice were immunized subcutaneously in three doses at 10 day intervals with a vaccine formulation comprised of the chimeric protein together with monophosphoryl lipid A (MPLA). Control groups included protein alone, MPLA, or PBS. After challenge infection, animals vaccinated with chimeric protein plus MPLA showed a reduction of 73.54% of larval load in the lung compared to control group animals. Animals immunized with chimeric protein plus MPLA also display higher IgG response and a reduction in lung inflammation. Our study highlights how chimeric proteins containing more than one B cell epitope can enhance immune protection against helminthic infection and offer new approaches to the development of Ascaris vaccines.     

The prevalence of stroke and related risk factors among residents aged ≥ 40 years in Chongqing,Southwest China

Journal of Public Health - China bears the largest global stroke burden, yet little is known about its rates in Chongqing, southwest China. We aimed to investigate the prevalence and related risk...     

直接法与统计法测试松质骨孔隙率的比较研究

目的 探讨松质骨孔隙率的测试方法。方法 对15根猪胫骨分别采用“直接法”与“统计法”测试松质骨孔隙率或其表观密度和材料密度。结果 （1）孔隙率与表观密度呈非常显著负相关,而与材料密度相关不显著;（2）孔隙率沿轴向靠近密质量骨逐渐减小,而沿横向基本不变;（3）统计法可测出松质骨各个层面的孔隙率大小。结论 直接法和统计法均能检测松质骨孔隙率,但统计法较直接法更能反映孔隙率的分布与变化规律。     

全麻诱导前预注芬太尼“先发镇痛”效应临床研究

目的：探讨全麻预注芬太尼的先发镇痛效应。／方法：选择40例择期全麻病人,随机分成试验组与对照组（n=20例）,术前常规用药,试验组诱导前用芬太尼5ug/kg,对照组将芬太尼改切皮后静注,术中麻醉维持相同,手术结束后病人自然清醒。术后有镇痛药使用意愿者均使用哌替啶镇痛。结果：两组病人一般情况及芬太尼总用量无显著性差异（P＞0．05）,试验组初次使用镇痛药时间明显延长（P＜0．01）,用药次数及剂量也显著少于对照组（P＜0．01）,试验组术后仅7（35％）例使用派替啶,而对照组使用哌替啶者达15（75％）例,两组差异性显著（P＜0．05）,结论：全麻前预注芬太尼具有良好的先发镇痛效应。     

手术联合丝裂霉素C治疗原发性翼状胬肉

目的 :观察原发性翼状胬肉单纯切除术中使用丝裂霉素C对预防复发的效果及安全性。方法 :对 1997年 10月至 1999年 3月门诊原发性翼状胬肉患者施行单纯切除术 ,并在翼状胬肉切除后立即用浸有 0 0 1%丝裂霉素C的棉片覆盖 5min。对照组仅施行单纯切除术 ,不使用丝裂霉素C。随访观察 6～ 12个月。结果 :72只单纯切除术联合应用丝裂霉素C的患眼有 9只眼复发 ,复发率为 12 5 0 % ,未发现任何严重并发症。对照组 198只眼有 76只眼复发 ,复发率为 38 38%。两者差异有显著性。结论 :在术中联合应用丝裂霉素C能够减少原发性翼状胬肉单纯切除术后的复发 ,并且安全。     

血浆代用品快速静脉输注对血清电解质的影响

目的 :观察 10 0例大中型手术患者手术早期快速静脉输入佳乐施和海脉素对血清电解质的影响。方法 :病人随机分为佳乐施组 (n =5 0 )和海脉素组 (n =5 0 ) ,静脉输入平衡盐液 5 0 0ml后快速输入佳乐施或海脉素 10 0 0ml,血浆代用品输入前后采取静脉血作血清电解质分析。结果 :佳乐施输入后血清K+较输入前降低 (P <0 .0 5 ) ,海脉素输入后血清Cl-和Ca 均较输入前增高 (P >0 .0 5 )。结论 :大剂量使用血浆代用品时应监测血清电解质水平和血液酸碱平衡情况。     

小儿化脓性中耳炎的病原学调查

目的　调查小儿化脓性中耳炎的主要病原菌及其对抗生素的耐药情况。方法　对 5 2例化脓性中耳炎患儿的中耳分泌物进行细菌培养 ,每份标本分别用 5 %～ 7%羊血平板和自制改良巧克力平板分离 ,置烛缸培养。对获得的病原菌用K -B纸片琼脂扩散法行药物敏感试验。结果　分离出 46株致病菌 ,嗜血杆菌 (15株 )和金黄色葡萄球菌为主 ,嗜血杆菌对青霉素和复方新诺明的耐药率分别为 83.3%和 40 % ,以金黄色葡萄球菌为主的临床常见菌对氨苄青霉素和氧哌嗪青霉素的耐药率分别为 95 .5 %和 5 4.2 %。结论　嗜血杆菌和金黄色葡萄球菌是本地区小儿化脓性中耳炎的主要致病菌 ,两者对青霉素类抗生素的耐药率皆较高。     

糖尿病患者胰岛素基因启动子的突变检测和临床应用

目的 :探讨胰岛素基因启动子突变是否与中国人 2型糖尿病相关。方法 :随机选择黑龙江省中国汉族人 89例 2型糖尿病 ,应用聚合酶链式反应———单链象多态性 (PCR -SS CP)检测方法检测胰岛素启动子突变。结果 :89例 2型糖尿病中未发现 1例异常泳动变化。结论 :胰岛素基因启动子突变可能不是中国人 2型糖尿病的重要遗传因素。文献报道美国黑人中胰岛素基因启动子突变 ( 8个碱基TGGTCTAA的重复序列 )与 2型糖尿病相关 ,本研究结果提示此种相关有明显的种族异质性