儿童精神分裂症患者和青年精神分裂症患者的认知功能比较研究

【目的】探讨儿童精神分裂症和青年精神分裂症患者认知功能障碍的异同。【方法】对36例12～16岁的儿童精神分裂症患者、34例18～25岁的青年精神分裂症患者各44名和31名正常对照进行了威斯康星卡片分类测验（WCST）和注意测验,评价指标有完成分类数、总错误数、持续错误数、非持续错误数、注意测验时间和错误数。【结果】显示儿童精神分裂症患者的正确分类数少于正常儿童（P〈0.05）,总错误数和持续错误数高于正常儿童（P〈0.05）,连线测验时间大于正常儿童（P〈0.05）;青年精神分裂症患者与正常青年比较结果类似;儿童精神分裂症连线测验B型错误数低于青年精神分裂症患者（P〈0.05）,其余各项测验两组之间无显著差异。【结论】提示儿童精神分裂症和青年患者均存在认知功能障碍,类型相似,但青年患者注意障碍严重程度高于儿童患者。     

Circulating cell‐free circRNA panel predicted tumorigenesis and development of colorectal cancer

BackgroundColorectal cancer (CRC) is reported with high morbidity and mortality. Currently, the sensitivity of diagnostic markers for colorectal cancer is low. Therefore, further exploration of new plasma diagnostic markers for early detection of colorectal cancer is of great value. We aimed to explore potential circRNAs in plasma as biomarkers for early diagnosis of CRC.MethodsWe employed the circRNA microarray to investigate dysregulated circRNAs in plasma samples of CRC patients, colorectal adenoma patients (CRA), and healthy controls. Through in‐depth analysis, significantly differentially expressed circRNAs were screened as candidate targets.ResultsEight circRNAs (hsa_circ_104885, hsa_circ_100185, hsa_circ_103171, hsa_circ_001978, hsa_circ_105039, hsa_circ_103627, hsa_circ_101717, and hsa_circ_104192) were obtained as candidate circRNAs with upregulation in CRC comparing with both CRA and healthy control. Through detecting the plasma expression levels of eight candidate targets, we identified three circRNA (hsa_circ_001978, hsa_circ_105039, and hsa_circ_103627) with increased level which were consistent with the microarray results in training set. Further validation found the circRNA panel was consistent with training set. The ROC curve also revealed a high diagnostic ability of hsa_circ_001978, hsa_circ_105039, and hsa_circ_103627 in predicted the CRC from CRA patients (AUC = 0.966) as well as healthy controls (AUC = 0.969).ConclusionOur data suggest that hsa_circ_001978, hsa_circ_105039, and hsa_circ_103627 might be a CRC‐specific biomarker for early diagnosis.     

Microstructure Evolution and Deformation Mechanisms of As-Cast Antibacterial Ti6Al4V-5Cu Alloy for Isothermal Forging Process

The hot workability behavior of antibacterial Ti6Al4V-5Cu alloy was investigated using a hot compression experiment in the temperature range of 790–1040 °C and strain rate of 10⁻³–10 s⁻¹ with a strain of 0.4. The deformation behavior of the alloy was characterized by Gleeble 3800 compression experiment, and the relationship among deformed microstructures and deformation parameters was established. The deformations of Ti6Al4V-5Cu alloy were temperature and strain rate-dependent. Higher temperature and lower strain rate made power dissipation efficiency (η) increase and reach 89%. The activation energies (Q) in the dual-phase (α + β) and single β phase regions were calculated as 175.43 and 159.03 kJ mol⁻¹, respectively. In the dual (α + β) phase region, with an increase in strain rate, flow-softening behavior was dominated, however in the single β phase region such as processing at 940 °C. Flow stress increased slightly in which work-hardening behavior was dominated (especially between strain rates of 10⁻³–1 s⁻¹). The deformation at various conditions exhibited different stress-strain profiles, providing an insight that work hardening and flow softening coexisted in Ti6Al4V-5Cu alloy. The relative intensity of oscillatory change in flow stress profile decreased as the strain rate decreased. The hot workability of Ti6Al4V-5Cu alloy was also accessed from the viewpoint of the sub-grain structure.     

血清NSE、HCY及8-羟基脱氧鸟苷酸在急性脑梗死患者中的表达及意义

目的 探讨血清神经元特异性烯醇化酶(NSE)、同型半胱氨酸(Hcy)及8-羟基脱氧鸟苷酸(8-OHdG)在急性脑梗死患者中的表达及意义.方法 选取该院2013年3月至2015年12月神经内科收治的100例急性脑梗死患者为脑梗死组,选择100例同期在该院健康体检者为对照组,脑梗死组再根据梗死体积将患者分为3组,梗死区大于l0 cm3为大体积梗死组(L组),5～10 cm3为中体积梗死组(M组),＜5 cm3为小体积梗死组(S组).比较脑梗死组与对照组,L组、M组、S组血清NSE、HCY及8-OHdG水平.采用Pearson相关检验对HCY、8-OHdG、NSE与脑梗死体积、神经功能缺损、预后情况进行相关性分析.结果 观察组患者HCY、8-OHdG及NSE水平较对照组高,差异有统计学意义(P＜0.05),L组较M组、S组患者HCY、8-OHdG及NSE水平高,差异有统计学意义(P＜0.05),HCY、8-OHdG及NSE与脑梗死体积、神经功能缺损呈正相关,与预后情况呈负相关.结论 血清NSE、HCY及8-OHdG在急性脑梗死患者中升高,且随着梗死体积的增大逐渐增高,血清NSE、HCY.及8-OHdG可用于病情及预后评估.     

微透析联用反相高效液相色谱研究白芥子涂方皮肤药动学

目的 研究白芥子涂方皮肤给药后皮肤局部药动学特征,为白芥子涂方贴敷预防和治疗哮喘的药物作用机制研究提供参考。方法 大鼠在体贴敷白芥子涂方后,以方中君药白芥子的有效成分芥子碱硫氰酸盐为指标,利用微透析采样技术,结合反相高效液相色谱分析,测定白芥子涂方贴敷给药后透析液的药物质量浓度,通过相对损失率的校正,计算皮肤药物质量浓度,并利用Kinetica 4.4软件对皮肤药物质量浓度和时间进行非房室模型拟合,计算相关统计矩参数。以相对累积吸收量对时间做图,计算稳态的吸收速率。结果 白芥子涂方贴敷给药后芥子碱硫氰酸盐达峰时间为1.5 h,平均滞留时间（MRT）约为22 h,半衰期 (t^1/2) 约15 h,稳态吸收速率为13.65 μg/h。结论 微透析取样技术结合反相高效液相色谱分析可研究白芥子涂方给药后的皮肤药动学,给药后的皮肤药动学行为与其临床作用特点相一致,可为阐明白芥子涂方贴敷预防和治疗哮喘的药物作用机制提供研究手段。     

补骨脂素混合结晶在S_(180)小鼠腹水和癌细胞内的浓度测定及药代动力学研究

补骨脂素混合结晶中补骨脂素在S_(180)小鼠腹水内属单室模型中呈双峰吸收。其动力学参数如下■l/2(h)为22.19;K_a(h~(-1))为12.3580;K(h-1)为0.0312;tlag(h)为0.0718;C_(max)(μg/ml)为6.3967;t_(max)(h)为0.5570;AUC(μg·h/ml)为175.0300。2亿S_(180)癌细胞内在0.25h时,其补骨脂素含量高达10.97μg/ml,腹水内补骨脂素含量既高且久,有利于肿瘤的冶疗。     

A mononuclear nine-coordinated Dy(iii) complex exhibiting field-induced single-ion magnetism behaviour

A new mononuclear Dy(iii) complex, with the formula [Dy(Hcpt)₃]·2H₂O (1), has been successfully prepared via self-assembly between Dy(iii) ions and 2-cyano-N′-(1-(pyridin-2-yl)amido)acetyl (Hcpt) ligand. X-ray diffraction study shows that the Dy(iii) ion is nine-coordinated by three Hcpt ligands with a tridentate chelating mode, leading to an approximately monocapped square-antiprismatic (C_4v) geometry. Magnetic data analysis demonstrates that 1 performs field-induced slow magnetic relaxation with a relaxation barrier of 97.90 K, due to the quantum tunneling effect suppressed upon a static dc field of 2000 Oe. To deeply understand the magnetic behaviors, the relaxation mechanisms and magneto-structure relationship are rationally discussed using ab initio calculations as well.

Reaction of Dy(iii) ion with tridentate acylhydrazone ligand leads to a field-induced Dy(iii) SIM, of which the magneto-structural correlation is elucidated by the magnetic and theoretical studies.     

临床医学院教学管理工作的思考

临床医学院教学管理工作直接影响到临床教学质量。非直属临床医学院没有专职教师,教研室管理比较松散。做好非直属临床医学院的教学管理工作,进一步增强教学意识,改进教学方法,规范教学要求,对于保证临床教学任务的落实、确保教学质量显得十分重要。     

Changes of gap junctional intercellular communication in detrusor instability

Detrusorinstability (DI)isacommonurologicprob lem .Atpresent ,thepathogenesisofDIhasn’tbeeneluci dated .Gapjunctions (GJ)areuniquechannelsthattrans mitionsandsmallmolecularmetabolitesbetweenadjacentcells .Theyplayanimportantroleinmaintainingexcitatorycommunicationamongadjacentcells[1] .Recentstudiesofthedetrusorhavesuggestedanewviewpointforthepatho genesisofDI[2 ] .Detrusorisakindofexcitabletissue ,andtheexcitabilityofdetrusormayplayakeyroleintheoccur renceofDI ,buttherewerenoreportsabou…     

血红素加氧酶-1诱导性高表达保护异种移植胰岛功能的研究

目的 探讨通过钴原卟啉(cobalt protoporphyrin,CoPP)诱导供体胰岛血红素氧化酶-1(heme oxygenase-1,HO-1)高表达对异种胰岛移植物的保护作用.方法 采用大鼠对小鼠胰岛移植模型,分为对照组、体内诱导组、体外诱导组、体内阻断组及体外阻断组5组,改良Gotoh法提取胰岛,移植于糖尿病模型小鼠的肾包膜下.比较各组受体移植后血糖维持正常时间,糖刺激试验检测胰岛功能,PCR和ELISA法分别检测移植物内和血清IL-10、TNF-α、IL-1β及INF-γ及其mRNA表达.分别以PCR和Western印迹法检测胰岛组织内HO-1mRNA及蛋白表达.病理学检查移植物淋巴细胞浸润情况.结果 对照组小鼠血糖维持正常时间为(9.33±1.37)d,与体内诱导组的(16.33±1.51)d及体外诱导组的(14.33±1.51)d相比差异有统计学意义(P<0.05),体内诱导组优于体外诱导组(P<0.05).受体阻断的两组血糖控制时间则与对照组相近,分别为:体内阻断组(9.67±1.03)d,体外阻断组(9.17±1.47)d.体内、外诱导组及对照组胰岛于低糖刺激下胰岛素分泌量差异无统计学意义(P>0.05),而高糖刺激下,体内诱导、体外诱导及对照组分别为:(187.68±19.93)、(137.22±11.73)及(91.25±12.64)μIU·ml~(-1)·10islets~(-1)·45 min~(-1),差异有统计学意义(P<0.05).移植后,接受经诱导处理的胰岛的两组小鼠血清IL-10含量[体内诱导(72.97±9.74)pg/ml、体外诱导(70.84±3.56)pg/ml]明显高于未处理组[(30.57±3.93)pg/ml]及阻断两组[体内阻断:(39.78±3.00)pg/ml、体外阻断:(35.42±4.30)pg/ml].两诱导组胰岛移植物的IL-10 mRNA表达强于对照及阻断两组.IFN-γ、TNF-α及IL-1β在各组间差异无统计学意义.体内、体外诱导两组HO-1mRNA、蛋白表达高于对照组,其中体内诱导组HO-1mRNA高于体外组,但两组HO-1蛋白表达相当.体内、外阻断组HO-1mRNA、蛋白表达与对照组相当.病理学检查示两诱导组移植物内淋巴细胞浸润少于对照及阻断两组. 结论 CoPP体内、外诱导He-1高表达可促进胰岛功能,延长移植物生存时间,体内诱导对异种移植胰岛保护效应强于体外诱导.