Evaluation of RGS4 as a candidate gene for schizophrenia.

Several studies have suggested that the regulator of G-protein signaling 4 (RGS4) may be a positional and functional candidate gene for schizophrenia. Three single nucleotide polymorphisms (SNP) located at the promoter region (SNP4 and SNP7) and the intron 1 (SNP18) of RGS4 have been verified in different ethnic groups. Positive results have been reported in these SNPs with different numbers of SNP combinatory haplotypes. In this study, these three SNP markers were genotyped in 218 schizophrenia pedigrees of Taiwan (864 individuals) for association analysis. Among these three SNPs, neither SNP4, SNP7, SNP18 has shown significant association with schizophrenia in single locus association analysis, nor any compositions of the three SNP haplotypes has shown significantly associations with the DSM-IV diagnosed schizophrenia. Our results fail to support the RGS4 as a candidate gene for schizophrenia when evaluated from these three SNP markers.     

通径分析在精神分裂症发病危险因素分析中的应用

本文对３０年前首次住院经ＣＣＭＤ－２再诊断的２０３例精神分裂症采用通径分析方法，进行了遗传流行病学对照研究。结果显示精神分裂症的发病与产次、性格、家族史有关。     

维拉帕米对失血性休克犬心脏的保护作用及机制

杂种犬１１只，由股动脉放血使平均动脉压（ＭＡＰ）维持在６．０ｋＰａ９０ｍｉｎ后回输全部血液，继续观察１５０ｍｉｎ。在休克３０ｍｉｎ后，对照组和维拉帕米处理组（Ｖｅｒ组）分别静脉滴注生理盐水和Ｖｅｒ溶液［（１０μｇ／ｋｇ·ｍｉｎ）１５ｍｉｎ］，液体总量为３ｍｌ／ｋｇ。对照组犬在失血后心率（ＨＲ）加快，左室ｄｐ／ｄｔｍａｘ显著降低，回输血液后ＭＡＰ虽有回升，但仍低于基础值，左室ｄｐ／ｄｔｍａｘ无明显改善；Ｖｅｒ使休克犬ＨＲ减慢，血液回输后ＭＡＰ缓慢恢复至基础值，左室ｄｐ／ｄｔｍａｘ显著高于对照组；电镜观察可见对照组心肌肌原纤维和线粒体等有明显的损伤，而Ｖｅｒ组心肌超微结构基本正常。结果还显示：Ｖｅｒ组犬心肌中丙二醛含量、黄嘌呤氧化酶活性低于对照组，而超氧化物歧化酶活性高于对照组。结果表明：Ｖｅｒ对失血性休克犬的心脏具有保护作用，其机制可能与其阻滞膜Ｃａ２＋内流、抑制脂质过氧化有关。     

842例工人、农民和战士最大呼气流量-容积曲线的测定

作者用“点值法”对成都市内和郊区842例从事轻、中、重劳动的健康工人、农民和战士作了MEFV曲线和常规肺功能测定,发现工人和农民在低肺容积时流量增加,在高、中肺容积时流量下降,并以农民最明显,重劳动工人次之,轻、中劳动工人较不明显,战士则相反。揭示不同的体力活动方式及生活条件可导致不同肺容积时的流量改变,以适应其代谢增强时的耗氧需求。     

Free Sugars Intake among Chinese Adolescents and Its Association with Dental Caries: A Cross-Sectional Study

This study aims to estimate the free sugars intake, identify the primary food sources of free sugars, and explore the relationship between free sugars intake and dental caries among Chinese adolescents. This cross-sectional study included 1517 middle-school students aged 12–14 years in Changsha city, China. Adolescents completed a 12-item Food Frequency Questionnaire (FFQ) and oral health assessment. The students’ dental caries experience was available as DMFT score (number of decayed, missing, and filled permanent teeth). Statistical analyses included the Mann–Whitney test, Kruskal–Wallis test, Chi-square test, and binary logistic regression model. The average intake of free sugars was 53.1 g/d in adolescents, and 43.2% of the students consumed more than 50 g of free sugars daily. The primary contributor to free sugars was sugar-sweetened beverages (SSBs). Age, boarders, and high family income were risk factors for excessive free sugars intake (p < 0.05), and increased free sugars intake was a risk factor for dental caries (odds ratio, OR = 1.446, 95% confidence interval: 1.138–1.839). Both the free sugars intake and dental caries prevalence in Chinese adolescents were high. Targeted interventions are urgently needed to address the excessive consumption of free sugars and improve Chinese adolescents’ oral health.     

消化内镜清洗消毒闭环管理系统构建与应用

结合消化内镜图文系统,根据消化内镜中心工作实际,构建并应用消化内镜清洗消毒闭环管理系统。实施后,清洗消毒错误事件从2017年2 973例下降至663例,工作效率从2017年30条/天提升至40条/天,差异均具有统计学意义（P<0.05)。消化内镜清洗消毒闭环管理系统提高了清洗消毒质量,提高了人力资源使用效率,提升了消化内镜中心质量管理水平。     

异丙酚对人脐静脉内皮细胞凋亡相关基因Bcl-2及Bax表达的影响

目的 :观察异丙酚 (Propofol)及肿瘤坏死因子 α(TNF α)对培养的人脐静脉内皮细胞 (HUVECs)凋亡相关基因Bcl 2及Bax表达的影响 ,探讨异丙酚抑制凋亡的机理。方法 :将培养的人脐静脉内皮细胞 3～ 4代于融合状态 ,随机分为 7组 :对照组 (P0 ) ,2 5 μmol/L异丙酚组 (P2 5) ,TNF α组 (P0 +TNF α) ,12 .5 μmol/L异丙酚和TNF α组 (P12 .5+TNF α) ,2 5 μmol/L异丙酚和TNF α组 (P2 5+TNF α) ,5 0 μmol/L异丙酚和TNF α组 (P50 +TNF α) ,10 0 μmol/L异丙酚和TNF α组 (P10 0 +TNF α)。各组加入相应药物培养 2 4h后收获细胞 ,采用免疫细胞化学染色方法测定Bcl 2及Bax蛋白表达。结果 :与对照组 (P0 )相比 ,异丙酚 2 5 μmol/L组 (P2 5)Bcl 2及Bax蛋白表达无明显变化 (P >0 .0 5 ) ;TNF α(P0 +TNF α)组Bcl 2蛋白表达降低 ,Bax蛋白表达升高 (P <0 .0 0 1) ;而不同浓度的异丙酚预处理后再加入肿瘤坏死因子的各组 (P12 .5+TNF α、P2 5+TNF α、P50 +TNF α、P10 0 +TNF α)Bcl 2蛋白表达增加 ,Bax蛋白表达降低 (P <0 .0 5或P <0 .0 1)。结论 :临床相关浓度的异丙酚可通过调节Bcl 2及Bax蛋白表达抑制TNF α诱导的内皮细胞凋亡     

切线时间常数在慢性阻塞性肺疾病及肺心病患者F-V曲线形状转变中的变化及临床意义

目的　探讨切线时间常数 ( τt)在慢性阻塞性肺疾病 ( COPD,慢阻肺 )和肺心病患者 F- V曲线形状转变中的变化及临床意义。方法　测定了 90例缓解期 COPD患者 (慢支 43例 ,肺气肿 47例 )及 31例合并肺心病患者的 F- V曲线。并在 F- V曲线上测量高、中、低肺容积的切线时间常数 τt75 、τt5 0 、τt2 5 ,与正常人和吸烟者的 τt作对比分析。结果　 1正常范围内 F- V曲线形状呈平台型、直线型、凸型和凹型 4种 ,| τt75 | >1s或 <1s,τt2 5 <1s,τt关系呈“青少年式”或“老年式”;2轻、中度异常的 F- V曲线呈凸型 ,| τt75 | <1s,τt2 5 ≈ 1s或 >1s,τt 关系呈“喇叭式”改变 ;3严重异常的 F- V曲线形状呈双曲线型 ,| τt75 | <1s,τt2 5 =4s～ 10 s,τt关系呈“塔式”改变。结论　双曲线型、τt2 5 极度延长和“塔式”改变是判断病情严重性的三大重要标志。该方法简便准确 ,利于在临床推广应用     

Safety and efficacy of thulium laser resection of bladder tumors versus transurethral resection of bladder tumors: a systematic review and meta-analysis

Lasers in Medical Science - The thulium laser resection of bladder tumor (TmLRBT) is widely used in the treatment of non-muscle-invasive bladder cancer (NMIBC), and we conduct this study to compare...