青中年高血压患者颈动脉粥样硬化与血尿酸及血脂的相关性探讨

目的：探讨青中年高血压患者颈动脉粥样硬化与血尿酸及血脂的关系。方法：选择同期体格检查青中年原发性高血压患者90例，采用颈动脉多普勒超声检测，根据颈动脉内-中膜厚度（IMT）、斑块、狭窄，分为颈动脉硬化组56例、颈动脉正常组34例，另选25名体格检查正常者为对照组。分别测定其血尿酸（UA）、血脂的水平。结果：颈动脉硬化组、颈动脉正常组与对照组比较：血尿酸、血总胆固醇（TC）、三酰甘油（TG）、低密度脂蛋白（LDL）差异均有显著性（P〈0．01）；颈动脉硬化组与颈动脉正常组的血尿酸、总胆固醇、低密度脂蛋白水平比较差异均有显著性（P〈0．01）。结论：血尿酸、总胆固醇、低密度脂蛋白水平增高是青中年高血压患者发生颈动脉粥样硬化的危险因素。     

3,5,2′,4′-四羟基查尔酮对小鼠血尿酸及肝脏XOD/XDH的影响

 目的 研究3,5,2′,4′-四羟基查尔酮(P40)对氧嗪酸钾诱导的高尿酸血症小鼠尿酸水平及肝脏黄嘌呤氧化还原酶的影响(量效及时效关系)。方法 腹腔注射尿酸酶抑制剂氧嗪酸钾(450 mg·kg ^-1体重)复制高尿酸血症小鼠模型。用磷钨酸法测定血尿酸(uric acid,UA)水平;用Elisa方法测定肝脏黄嘌呤氧化酶(XOD)及黄嘌呤脱氢酶(XDH)的含量。结果 灌胃给予3,5,2′,4′-四羟基查尔酮(0.5~4.0 mg·kg ^-1)后,显著降低高尿酸血症小鼠的血清尿酸水平和肝脏中黄嘌呤氧化酶的含量,与模型组相比,差异有统计学意义(P<0.05,P<0.01)。灌胃给予别嘌醇30 min、3,5,2′,4′-四羟基查尔酮 60 min时即能显著降低高尿酸小鼠血清尿酸水平;给予3,5,2′,4′-四羟基查尔酮/别嘌醇15、30、60、90 min后,均能降低肝脏中黄嘌呤氧化酶及黄嘌呤脱氢酶的含量,与模型组相比,差异有统计学意义(P<0.05,P<0.01)。结论 ①3,5,2′,4′-四羟基查尔酮可降低氧嗪酸钾所致高尿酸血症小鼠的尿酸水平,起效时间慢于别嘌醇;② 3,5,2′,4′-四羟基查尔酮的降尿酸作用与抑制黄嘌呤氧化还原酶活性有关。     

熊果酸抑制HepG2中C-反应蛋白的异常表达及其对HUVECs的损伤

目的:研究不同剂量的熊果酸(UA)对IL-6诱导的HepG2细胞中C-反应蛋白(CRP)异常表达的抑制作用以及对CRP所致人脐静脉血管内皮细胞(HUVECs)损伤的保护作用.方法:IL-6(30 ng/mL)、UA(6.5、12.5、25μmol/L)与IL-6(30 ng/mL)共同作用于HepG2细胞48 h,分别用MTT法、Western blot法及RT-PCR法检测各组细胞活力、CRP蛋白及mRNA表达情况.CRP(25 μg/mL)、UA(5,10,20 μmol/L)与CRP(25 μg/mL)共同作用于HUVECs 24 h,分别用MTT法、Western blot法及RT-PCR法检测各组细胞增殖、VCAM-1和LOX-1的蛋白及mRNA表达.结果:UA能显著抑制IL-6诱导的HUVECs细胞活力下降及细胞中CRP蛋白与mRNA的表达升高;UA显著抑制CRP引起的内皮细胞增殖,并且在mRNA及蛋白水平均能显著抑制CRP诱导的HUVECs异常高表达VCAM-1及LOX-1.结论:UA可通过抑制肝脏合成炎症因子CRP而降低血液中CRP浓度,并降低CRP等炎症因子对内皮细胞的损伤等途径从而发挥抗心肌缺血及动脉粥样硬化等心血管疾病的作用.     

抗肿瘤海洋放线菌LYG-1的筛选及分类鉴定

从连云港海域海泥中分离得到一株具有抗肿瘤活性海洋放线菌LYG-1,通过对其形态特征、培养特征、生理生化特性的研究以及16S rRNA基因序列分析,将海洋放线菌LYG-1归属为链霉菌属玫瑰孢链霉菌(Streptomyces roseos-porus)的新的海洋变种。利用MTT法对海洋放线菌LYG-1发酵产物的抗肿瘤活性进行了初步研究,结果表明放线菌LYG-1的发酵原液对HepG2、MCF-7、HCT116以及MDA-MB-231 4种肿瘤细胞具有良好的体外抗肿瘤活性。     

铝螯合剂对染铝大鼠肾功能及必需元素的影响

目的：探讨铝螯合剂1,2-二甲基-3-羟基-4-吡啶酮(1,2-dimethyl-3-hydroxy-4-pyridone，DHPO)对铝染毒大鼠血清肌酐、尿素氮、尿酸及肾脏中铝、锌、铜、铁、钙、镁等元素的影响。方法：30只雄性Wistar大鼠随机分为6组，阴性对照组、铝染毒组、预防组及低、中、高剂量组，AlCl3染毒3周后分别给予不同剂量的DHPO 1周，测定血清肌酐、尿素氮、尿酸含量及肾脏中铝、锌、铜、铁、钙、镁等元素的含量。结果：铝染毒组尿素氮含量显著高于阴性对照组（P＜0.05），其余各组与阴性对照组相比差异均无统计学意义；各组大鼠血清中肌酐、尿酸含量比较差异均无统计学意义。铝染毒组肾脏中Al含量显著高于阴性对照组（P＜0.01），低、中、高剂量组均显著低于铝染毒组（P＜0.01），且中、高剂量组与阴性对照组相比差异均无统计学意义；铝染毒组、低剂量组大鼠肾脏中铜含量均显著低于阴性对照组（P＜0.01，P＜0.05），而中、高剂量组与阴性对照组相比差异无统计学意义；低、中、高剂量组的大鼠肾脏中锌、铁、钙、镁的含量与阴性对照组相比差异均无统计学意义。结论：DHPO在促排铝的同时，对肾脏中锌、铜、铁、钙、镁含量无影响，且能使受损的肾功能得到恢复。     

Safety of high doses of Propionibacterium freudenreichii ET-3 culture in healthy adult subjects

Propionibacterium freudenreichii ET-3 (7025) culture, a cell-free product of whey fermentation by P. freudenreichii ET-3, has been shown to promote the growth of Bifidobacteria through the action of 1,4-dihydroxy-2-naphthoic acid (DHNA). Here we report the results of two clinical studies designed to evaluate the safety of high doses of P. freudenreichii ET-3 culture medium. Study 1 had a randomized, double-blind, crossover design. Ten healthy male and four healthy female subjects received 45 tablets of either P. freudenreichii ET-3 culture medium (total daily intake of 3g solid content and 283.5μg of DHNA; active group) or placebo (unfermented product) during two 1-week supplementation periods separated by a 4-week washout period. In Study 2, 11 healthy men took four tablets of P. freudenreichii ET-3 culture medium per day (total daily intake of 0.267g solid content and 22.5μg of DHNA) for a period of 13weeks. In both studies, hematological, clinical chemistry, and urinary parameters were measured before and after each supplementation period and gastrointestinal symptoms were assessed by questionnaire. In Study 1, there were no statistically significant differences between placebo and active supplementation periods in any measured parameter and the incidence of gastrointestinal symptoms were similar between groups. In Study 2, total protein, white blood cell count, hemoglobin, and mean corpuscular hemoglobin concentration decreased significantly from baseline and mean corpuscular volume and urine pH increased from baseline. The changes in hematological parameters were deemed not to be due to P. freudenreichii ET-3 culture medium supplementation given that all parameters remained within normal ranges and were not consistent with any clinically meaningful effect.     

12230例健康体检人群6项生化指标分析

目的:了解健康体检人群的TG、TC、HDL-C、LDL-C、FPG、UA等6项生化指标水平。方法:12 230例体检人员依性别、年龄段分组,用东芝TBA-40FR全自动生化分析仪检测6项血生化指标,分析6项生化结果的均值及异常患病率。结果:男性TG、TC、LDL-C、FPG、UA的均值水平高于女性,而HDL-C结果明显低于女性。在各年龄段中,TG的均值从<30岁开始上升,最高值在51~60岁段;TC、LDL-C、FPG的均值从<30岁开始上升,最高值在61~70岁段;HDL-C的均值从<30岁开始下降趋势,最低值在>70岁段;UA的均值从<30岁开始上升,最高值在>70岁段。异常指标从高到低排列为:高LDL-C>高TG>高TC>低HDL-C>高FPG>高UA。结论:体检人群中血脂、血糖、尿酸的异常率较高,并且6项生化结果的均值随年龄、性别的不同有显著性差异。     

Correlation between serum Dickkopf-1 (DKK1) levels and coronary artery stenosis

Background and aimsTo study the correlation between the level of serum Dickkopf-1 (DKK1) and the degree of coronary artery stenosis in patients with coronary atherosclerotic heart disease.Methods and resultsIn 2018, general data and biochemical indexes of 311 patients who underwent coronary angiography were recorded. Before procedure, arterial blood was drawn and the concentrations of DKK1, retinol binding protein 4 (RBP4), plasminogen activator inhibitor (PAI-1) were measured. Based on coronary angiography results, subjects were divided into a coronary heart disease (CHD) group; and a non-coronary heart disease (non-CHD)group. The CHD group was divided into three subgroups: the low Gensini score; the middle Gensini score; and the high Gensini score subgroups. Compared with those of the non-CHD group, DKK1, RBP4 and PAI-1 of the CHD group were significantly higher, while the OC was lower.DKK1,RBP4 and PAI-1 levels of the middle and high Gensini subgroups were significantly higher, compared with that of the low Gensini subgroup. Differences between osteocalcin (OC), beta-isomerized C-terminal telopeptidase (β-CTX), and 25(OH)₂D₃ of the three subgroups were not significant.Correlation between DKK1 and the inflammatory factors, RBP4 and PAI-1, was positive. Correlation between DKK1 and β - CTX, 25(OH)₂D₃ and OC was not significant. DKK1 was a risk factor for CHD. The degree of coronary artery stenosis was related to DKK1 concentration.ConclusionsSerum DKK1 levels in coronary heart disease patients were significantly higher, and positively correlated with the degree of coronary artery stenosis. DKK1 level is an independent risk factor for coronary heart disease.     

Ultra-processed foods: Cross-sectional and longitudinal association with uric acid and hyperuricemia in ELSA-Brasil

Background and aimsFood intake influences uric acid (UA) levels and hyperuricemia (HU), but evidence on the role of ultra-processed foods (UPFs) are scarce. The association between UPFs consumption and (1) HU prevalence and UA levels; (2) HU cumulative incidence; and (3) UA level change over a 4-year period was investigated.Methods and resultsCross-sectional and longitudinal analyses were performed using baseline (2008–2010, aged 35–74 years) and second visit (2012–2014) data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). Participants with glomerular filtration rate <60 mL/min/1.73 m2, bariatric surgery, implausible caloric intake, and using urate-lowering therapy (ULT) at baseline were excluded (all analyses). Participants with HU at baseline were excluded from longitudinal analyses. UPFs consumption was assessed using a food frequency questionnaire (FFQ) and categorized by the NOVA classification system (100 g/day). HU was defined as UA≥6.8 mg/dL. Linear, logistic, and mixed-effect linear regressions investigated the associations between UPFs consumption and UA/HU, adjusted for covariates. The final samples included 13,923 (cross-sectional) and 10,517 (longitudinal) individuals. The prevalence of HU was 18.7%, and the cumulative incidence was 4.9%. Greater UPFs consumption was associated with a greater prevalence of HU (OR:1.025 95%CI: 1.006; 1.044) and higher UA levels (β:0.024 95%CI: 0.016; 0.032). Every additional consumption of 100 g/day of UPFs raised the 4-year cumulative incidence of HU by 5.6% (95%CI: 1.021; 1.092). However, UPFs were not associated with the pace of UA level changes during the study period.ConclusionThe present study shows that greater UPFs consumption is associated with another deleterious health consequence: higher UA levels and the risk of having HU.