支原体与非淋菌性尿道炎(粘液性宫颈炎)的相关性研究

目的　探讨解脲脲原体、人型支原体与非淋菌性尿道炎( NGU)、粘液性宫颈炎( MPC)的相关性。方法　采用涂片法检测阴道毛滴虫、念珠菌和细菌性阴道病,EL ISA法测定衣原体和培养法分离淋球菌和支原体。结果　广东省皮肤性病防治中心性病门诊30 0例患者中,诊断为男性NGU34例和女性MPC83例。解脲脲原体总的检出率为30 % ( 90 / 30 0 )。女性总检出率为4 7.6 % ( 4 9/ 10 3) ,其中MPC组检出率为70 % ( 14 / 2 0 ) ,非MPC组为5 3% ( 4 4/ 83) ,两者比较差异无显著性( χ2 =1.4 8,P>0 .0 5 )。男性总检出率为16 .2 % ( 32 / 197) ,其中NGU组为35 .3% ( 12 / 34) ,非NGU为12 .3% ( 2 0 / 16 3) ,两者比较差异有显著性( χ2 =5 .5 6 ,P<0 .0 5 )。人型支原体仅在非NGU(粘液性宫颈炎)中检出9例( 3.0 % )。结论　解脲脲原体与男性NGU相关,而与女性MPC无相关性;人型支原体与NGU无相关性。临床实验室检出支原体时应慎重解释结果     

甘蔗种质间亲缘关系及特异标记的RAPD分析

采用RAPD技术分析甘蔗种质问的亲缘关系及特异标记。筛选出25个扩增多态性较强的随机引物,构建了41份甘蔗种质的RAPD指纹图谱,并对RAPD数据进行UPGMA聚类分析。甘蔗栽培品种之间、栽培品种与近缘种之间以及近缘种相互间的遗传相似系数变异范围为0．56～0．92,表明所研究的甘蔗种质之间的亲缘关系较近。此外,发现某些甘蔗亲本种质具有特异RAPD标记带。     

原核生物基因组的CDS与ORF序列的几点分析

基因组的开放阅读框（ORF）是基因识别与基因组分析的基础,有多种软件包给出了它们的生成算法,但结果与指标并不统一.本文给出了po-MORF的定义与它的生成算法,证明了由基因组所确定的po-MORF集合的存在与唯一性,并由该生成算法可以得到全部po-MORF序列.我们还比较了若干原核生物基因组中所有CDS与po-MORF序列的相互关系,并讨论了关于基因识别中的有关问题.     

直肠癌组织中PTEN和Notch1的表达及其与临床病理参数的关系

目的:探究直肠癌组织中PTEN和Notch1的表达及其与临床病理参数的关系。方法:收集2014年1月~2015年4月,我院肿瘤外科确诊48例直肠癌病理组织标本与20例直肠癌患者癌旁正常组织标本为研究对象,应用免疫组化链霉菌抗生物素蛋白-过氧化物酶连结法(S-P法)分析PTEN和Notch1蛋白在直肠癌病理组织和正常组织中的表达情况。结果:PTEN和Notch1主要表达于直肠癌组织细胞质中,呈现棕黄色;Notch1在直肠癌病理组织中表达率显著高于正常组织(P0.05);PTEN在正常组织表达率显著高于在直肠癌组织(P0.05);Notch1在淋巴转移、中底分化及分期为C期患者病理组织中表达率较高(P0.05);PTEN在无淋巴转移、中底分化程度及A+B期患者病理组织表达率较高(P0.05);相关性分析显示,Notch1和PTEN在直肠癌病理组织中表达呈现负相关关系(r=-0.534,P=0.000)。结论:Notch1和PTEN表达失调在直肠癌的发生、发展和淋巴结转移中有重要作用;PTEN表达可能对直肠癌的发生、发展具有抑制作用,Notch1表达可能对直肠癌的发生、发展具有促进作用。     

Discovery of a novel 2,4-dimethylquinoline-6-carboxamide M4 positive allosteric modulator (PAM) chemotype via scaffold hopping

This Letter details our efforts to replace the 3-amino moiety, an essential pharmacophore for M₄ PAM activity in most M₄ PAMs to date, within the thieno[2,3-b]pyridine core, as the β-amino carboxamide motif has been shown to engender poor solubility, varying degrees of P-gp efflux and represents a structural alert. A scaffold hopping exercise identified a novel 2,4-dimethylquinoline carboxamide core that provided M₄ PAM activity and good CNS penetration without an amino moiety. In addition, MacMillan photoredox catalysis chemistry was essential for construction of the 2,4-dimethylquinoline core.     

Impact of changes in relationship status on smoking behavior and body weight

This paper examines whether and how changes in relationship status (i.e., cohabitation, marriage, separation, or divorce) affect individuals’ smoking behavior and body weight. Using German Socio-Economic Panel data, this study accounts for differences between treated (i.e., those affected by a specific family event) and untreated participants since treatment and control groups differ with respect to several characteristics such as age, which may bias the results. Therefore, regression-adjusted matching is employed for each family event separately. This study, thus, takes steps towards disentangling causality from correlation. Overall, changes in family composition (such as moving together with or separating from the partner) impact the probability to start or quit smoking and lead to changes in body weight. In particular, smoking behavior and body weight are predominantly affected by forming or dissolving a household, rather than by marriage or divorce: cohabitation leads to weight gain; separation from a partner leads to weight loss, increased smoking initiation, and decreased smoking cessation.     

Promising antibacterial agents against multidrug resistant Staphylococcus aureus

Rapid emergence of multidrug resistant Staphylococcus aureus infections has created a critical health menace universally. Resistance to all the available chemotherapeutics has been on rise which led to WHO to stratify Staphylococcus aureus as high tier priorty II pathogen. Hence, discovery and development of new antibacterial agents with new mode of action is crucial to address the multidrug resistant Staphylococcus aureus infections. The egressing understanding of new antibacterials on their biological target provides opportunities for new therapeutic agents. This review underlines on various aspects of drug design, structure activity relationships (SARs) and mechanism of action of various new antibacterial agents and also covers the recent reports on new antibacterial agents with potent activity against multidrug resistant Staphylococcus aureus. This review provides attention on in vitro and in vivo pharmacological activities of new antibacterial agents in the point of view of drug discovery and development.     

Relationship between temperature and cauliflower (<Emphasis Type="Italic">Brassica oleracea</Emphasis> L. <Emphasis Type="Italic">var. botrytis</Emphasis>) growth and development after curd initiation

Two experiments were conducted to assess the response of cauliflower (Brassica oleracea L. var. botrytis) cv. “Nautilus” F1 hybrid to different constant temperatures after curd initiation by keeping the plants in six different temperature-controlled glasshouse compartments with heating set point temperatures of 6, 10, 14, 18, 22, and 26 °C (±4 °C) at the School of Plant Sciences, The University of Reading, UK during winter 1998–1999 and summer 1999. Many of the growth parameters increased with increasing mean growing temperature up to an optimum temperature and then declined with further increases in temperature. Therefore, cauliflower’s growth and development after curd initiation could be resolved into linear or curvilinear function of effective temperatures calculated with optimum temperatures between 19 and 23 °C. It is suggested that future warmer climates will be beneficial for winter cauliflower production rather than summer cauliflower production.     

颈动脉斑块易损性与血脂指标、炎症因子和冠心病的关系

目的:探讨颈动脉斑块易损性与血脂指标、炎症因子和冠心病的关系。方法:选择2016年1月-2018年1月在我院进行治疗的颈动脉斑块患者95例为研究对象,所有患者均进行颈动脉超声检查,根据超声检查结果的斑块性质将患者分为稳定组(n=43)和易损组(n=52)。检测两组患者的总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)等血脂指标,对比两组患者的血清白介素-8(IL-8)、超敏C反应蛋白(hs-CRP)、细胞黏附因子-1(ICAM-1)、趋化因子(RANTES)水平,统计两组患者的冠心病发生率。结果:易损组患者的TC、TG、LDL-C均高于稳定组,HDL-C低于稳定组,组间比较差异有统计学意义(P0.05)。易损组患者的IL-8、hs-CRP、ICAM-1、RANTES水平均高于稳定组,组间比较差异有统计学意义(P0.05)。稳定组冠心病发生率为53.49%(23/43),易损组冠心病发生率为78.85%(41/52),两组冠心病发生率比较差异有统计学意义(P0.05)。结论:颈动脉斑块易损性可导致患者的血脂指标、血清炎症因子指标进一步恶化,也会增加患者出现冠心病的发生机率。     

维持性血液透析患者孤独状况与社会支持的关系研究

目的:调查维持性血液透析(MHD)患者的孤独状况,并探讨其与社会支持的关系。方法:采用问卷调查的方式对145例2018年1月至2019年6月期间来我院就诊的MHD患者(实验组)和同期150例健康状况良好正常人(对照组)进行调查,内容包括一般资料调查表、孤独量表(UCLA)、社会支持评定量表(SSRS),单因素Logistic回归模型筛选出造成孤独状况的危险因素,再采用非条件多因素Logistic回归模型计算危险因素与疾病的相关性。结果:实验组UCLA得分为(65.12±12.38)分,明显高于对照组的(25.38±5.57)分(P0.05),实验组SSRS量表中客观支持、主观支持、支持利用度以及总分分别为(14.86±1.89)分、(13.12±2.13)分、(10.88±1.56)分、(35.21±11.82)分,均低于对照组的(18.78±3.23)分、(20.95±3.06)分、(15.61±2.28)分、(50.98±15.24)分(P0.05)。多因素非条件Logistic回归显示MHD患者孤独状态的危险因素依次是客观支持、主观支持、支持利用度、透析年限及年龄(OR=5.246、4.568、4.315、4.172、2.342,均P0.05)。结论:MHD患者处于较为严重的孤独状态,社会支持是造成患者孤独状况的首要危险因素,良好的社会支持可以改善MHD患者的孤独状况。