增殖细胞核抗原和Bcl-2蛋白在粘液表皮样癌中的表达及其意义

目的：探讨PCNA、Bcl-2蛋白在粘液表皮样癌中的表达及其相互联系。方法：对33例手术切除的粘液表皮样癌组织标本进行免疫组化染色，结果：24例粘液表皮样癌均显示PCNA阳性，低分化组的PCNA表达较高分化组高（P＜0．05）。Bcl-2为弱阳性表达，高分化组的Bcl-2表达较低分化组高，二组之间的Bcl-2阳性表达水平差异显著性（P＜0．05）。XFYW：PCNA与Bcl-2无明显关系。     

牙槽骨吸收与吸烟状况的研究

目的: 评价不同程度牙槽骨吸收的牙数与每日吸烟量和血浆中cotinine水平的关系。方法: 120名未治疗的慢性牙周炎患者,男 48,女 72,平均年龄 42. 3岁。根据自述的吸烟状况分组。116人检测了血浆cotin ine水平。根据骨吸收达根长的冠 1 /3、中 1 /3和根 1 /3, 牙槽骨吸收分为轻、中、重度骨吸收。结果:cotinine水平与自述的吸烟状况呈正相关(P<0. 001)。重度吸烟组较非吸烟组,中度骨吸收的牙齿数明显增多;而非吸烟组,无骨吸收的牙齿多(P值均<0. 001)。结论:吸烟>10支 /d是牙槽骨吸收牙数增加的重要危险因素。     

Dental resin composites containing ceramic whiskers and precured glass ionomer particles.

OBJECTIVES: Glass ionomer, resin-modified glass ionomer, and compomer materials are susceptible to brittle fracture and are inadequate for use in large stress-bearing posterior restorations. The aim of this study was to use ceramic single crystal whiskers to reinforce composites formulated with precured glass ionomer, and to examine the effects of whisker-to-precured glass ionomer mass ratio on mechanical properties, fluoride release, and polishability of the composites. METHODS: Silica particles were fused onto silicon nitride whiskers to facilitate silanization and to improve whisker retention in the matrix. Hardened glass ionomer was ground into a fine powder, mixed with whiskers, and used as fillers for a dental resin. Four control materials were also tested: a glass ionomer, a resin-modified glass ionomer, a compomer, and a hybrid composite. A three-point flexural test was used to measure flexural strength, modulus, and work-of-fracture. A fluoride ion-selective electrode was used to measure fluoride release. Composite surfaces polished simulating clinical procedures were examined by SEM and profilometry. RESULTS: At whisker/(whisker + precured glass ionomer) mass fractions of 1.0 and 0.91, the whisker composite had a flexural strength in MPa (mean (SD); n = 6) of (196 (10)) and (150 (16)), respectively, compared to (15 (7)) for glass ionomer, (39 (8)) for resin-modified glass ionomer, (89 (18)) for compomer, and (120 (16)) for hybrid composite. The whisker composite had a cumulative fluoride release of nearly 20% of that of the glass ionomer after 90 days. The whisker composites had surface roughness comparable to the hybrid resin composite. SIGNIFICANCE: Composites filled with precured glass ionomer particles and whiskers exhibit moderate fluoride release with improved mechanical properties; the whisker-to-glass ionomer ratio is a key microstructural parameter that controls fluoride release and mechanical properties.     

下颌阻生第三磨牙拔除术后疼痛、张口受限及肿胀之分析

目的：探讨下颌阻生第三磨牙拔除术后的疼痛，张口受限及肿胀与手术难度的关系。方法：收集124例下颌阻生第三磨牙拔除术的病例，按手术难度分为三组，分别于术后第二日及第七日分析三者之间的疼痛，张口受限及肿胀差异。结果：三组的大部分病例均发生了张口受限，疼痛及肿胀反应，术后第二日及第七日三组间张口受限差异无统计学意义，术后第二日，挺出组疼痛分级程度较其它两组轻，而切开组与去骨组疼痛的分级无差异；术后第七日，去骨组仍有疼痛的比例较高，而切开组与挺出组间则无差异，术后第二日及第七日，去骨组及切开组之肿胀分级均较挺出组为高，在去骨组与切开组间则均无差异。结论：下颌阻生第三磨牙拔除术后均有可能发生张口受限，疼痛及肿胀反应，张口受限与手术难度无关，软组织损伤小者。术后疼痛较轻，去骨无加重疼痛，但疼痛缓解较慢，软组织的损伤程度与肿胀的发生及缓解有关联，肿胀与是否去骨并无密切关系。     

Inverted U-Shaped Associations between Glycemic Indices and Serum Uric Acid Levels in the General Chinese Population: Findings from the China Cardiometabolic Disease and Cancer Cohort (4C) Study

Objective The relationship between serum uric acid(SUA)levels and glycemic indices,including plasma glucose(FPG),2-hour postload glucose(2 h-PG),and glycated hemoglobin(HbA1 c),remains inconclusive.We aimed to explore the associations between glycemic indices and SUA levels in the general Chinese population.Methods The current study was a cross-sectional analysis using the first follow-up survey data from The China Cardiometabolic Disease and Cancer Cohort Study.A total of 105,922 community-dwelling adults aged≥40 years underwent the oral glucose tolerance test and uric acid assessment.The nonlinear relationships between glycemic indices and SUA levels were explored using generalized additive models.Results A total of 30,941 men and 62,361 women were eligible for the current analysis.Generalized additive models verified the inverted U-shaped association between glycemic indices and SUA levels,but with different inflection points in men and women.The thresholds for FPG,2 h-PG,and HbA1 c for men and women were 6.5/8.0 mmol/L,11.0/14.0 mmol/L,and 6.1/6.5,respectively(SUA levels increased with increasing glycemic indices before the inflection points and then eventually decreased with further increases in the glycemic indices).Conclusion An inverted U-shaped association was observed between major glycemic indices and uric acid levels in both sexes,while the inflection points were reached earlier in men than in women.     

凝血酶调节蛋白、纤溶酶原激活剂抑制物-1与儿童免疫性血小板减少症的相关性

目的探讨凝血酶调节蛋白(TM)、纤溶酶原激活剂抑制物-1(PAI-1)与儿童免疫性血小板减少症(IPT)的相关性。方法选取2018年9月~2019年12月期间的70例ITP患儿作为研究对象,设为ITP组。选取同期进行体检的儿童50例作为对照组。比较各组间血清TM、PAI-1水平及PLT。结果ITP组血清TM、PAI-1水平显著高于对照组,PLT显著低于对照组(P<0.05)。ITP组治疗后血清TM、PAI-1水平显著低于治疗前,PLT显著高于治疗前(P<0.05)。经过Pearson相关性分析,ITP患者血清TM、PAI-1水平与PLT均呈负相关(P<0.05)。结论血清TM、PAI-1水平与儿童IPT密切相关,可以作为临床疾病监测的辅助指标。     

HTR2C polymorphisms,olanzapine-induced weight gain and antipsychotic-induced metabolic syndrome in schizophrenia patients: A meta-analysis

Objective. To conduct meta-analyses of all published association studies on the HTR2C -759C/T (rs3813829) polymorphism and olanzapine-induced weight gain in schizophrenia patients and on the HTR2C -759C/T, -697G/C (rs518147) and rs1414334:C> G polymorphisms and olanzapine/clozapine/risperidone-induced metabolic syndrome in schizophrenia patients. Methods. Eligible studies were identified by searching PubMed and Web of Science databases. Meta-analyses were performed using Cochrane Review Manager (RevMan, version 5.2) to calculate the pooled odds ratio (OR) and its corresponding 95% confidence interval (CI). Results. Our meta-analyses revealed both a significant positive association between the rs1414334 C allele and olanzapine/clozapine/risperidone-induced metabolic syndrome and a marginally significant positive association between the -697C allele and the induced metabolic syndrome in schizophrenia patients, but no significant association between the -759C/T polymorphism and the induced metabolic syndrome in schizophrenia patients. Our analysis further revealed a pronounced trend toward a significant negative association between the -759T allele and high olanzapine-induced weight gain and a trend toward a significant positive association between the -759C allele and high olanzapine-induced weight gain in Caucasian schizophrenia patients. Conclusions. Our results support that HTR2C polymorphisms play a role in antipsychotic-induced metabolic disturbance. More association studies are needed to further elucidate association of different HTR2C polymorphisms and antipsychotic-induced metabolic disturbance.     

Mash1 efficiently reprograms rat astrocytes into neurons简

To date, it remains poorly understood whether astrocytes can be easily reprogrammed into neurons. Mashl and Brn2 have been previously shown to cooperate to reprogram fibroblasts into neurons. In this study, we examined astrocytes from 2-month-old Sprague-Dawley rats, and found that Brn2 was expressed, but Mashl was not detectable. Thus, we hypothesized that Mashl alone could be used to reprogram astrocytes into neurons. We transfected a recombinant MSCV-MASH1 plasmid into astrocytes for 72 hours, and saw that all cells expressed Mashl. One week later, we observed the changes in morphology of astrocytes, which showed typical neuro- nal characteristics. Moreover, β-tubulin expression levels were significantly higher in astrocytes expressing Mashl than in control cells. These results indicate that Mashl alone can reprogram astrocytes into neurons.     

创伤性凝血病患者血清hs-CRP及TNF-α水平与预后的关系

目的：探讨创伤性凝血病患者血清hs-CRP及TNF-α水平及与预后的关系。方法回顾性分析50例创伤性凝血病患者的临床资料,根据患者不同预后分为存活组与死亡组,比较2组凝血功能指标及血清 TNF-α及hs-CRP水平。结果治疗28 d时,存活31例,死亡19例,病死率38％;存活组患者入院时PLT显著高于死亡组,且PT、APTT、D-dimer显著低于死亡组,差异均有统计学意义（P＜0.05）;存活组患者入院时血清hs-CRP及TNF-α水平均显著低于死亡组,差异有统计学意义（P＜0.05）。结论创伤性凝血病患者血清hs-CRP及TNF-α水平显著升高,并可作为判断患者预后的指标。