掌背动脉皮瓣的应用解剖

目的：手指软组织损伤，使用手背动脉皮瓣进行修复，手术简单，转移方便，并能很好满足手指修复中对于弹性，厚度，韧度，感觉和活动功能等诸多要求，方法：４３只上肢标本，色素动脉灌注，解剖掌背动脉及分支，结果：观测掌背动脉起源，形态，分支吻合，管径，并计算各吻合点的自比例定位，结论；提出掌背动脉轴形皮瓣应用范围及可行性，为临床提供解剖学资料和手术操作要点。     

一次性注射器填充级HDPE专用料的研制

通过对母料载体树脂的筛选,无机填料的选择,添加性能优良的耐辐射助剂,制成了具有耐辐射性能、加工性能良好的母料,该母料的制备工艺简单。本文所述的填充级HDPE专用料是将HDPE与填充母料经过简单掺混制成的。经测试专用料满足国家医药标准YY 0114—93《医用输液、输血、注射器聚乙烯专用料》的要求。制品厂试验表明:该填充级的HDPE专用料加工性能良好,用该填充级HDPE专用料注射成型的注射器芯杆装配成一次性注射器满足国家专业标准ZBC 31009—87《一次性无菌注射器》的要求。该填充母料的加入可大大降低材料的成本,100份HDPE 7006A可添加67份填充母料,该填充级专用料的价格比HDPE树脂降低约1500元/吨,因此该填充级HDPE专用料的推广和使用具有良好的经济效益。     

G-CSF对外周血树突状细胞亚群比例的影响

目的 :了解G CSF对小鼠外周血树突状细胞 (DC)亚群比例的影响。方法 :以不同剂量 (0、5 .0、10 .0或 15 .0 μg)的G CSF ,分别皮下注射于BALB/c小鼠 ,连续 6d ,每天 1次。第 6天分离外周血DC ,用流式细胞仪检测DC1(CD11c+ CD8a-)和DC2 (CD11c+ CD8a+ )的比例并计算其绝对值。结果 :经不同剂量的G CSF刺激后 ,外周血DC1的绝对值无显著变化 ,而DC2的绝对值增加 5倍 (9.6× 10 6/Lvs 5 5 .1× 10 6/L ,P <0 .0 1) ,DC1/DC2比值降低 (4.2vs 0 .7,P <0 .0 1)。结论 :G CSF在体内可提高外周血DC2的绝对数 ,对DC1的数无明显影响 ,从而使DC1/DC2的比例倒置     

炎症因子对肾小球系膜细胞分泌IL—8的影响

目的：观察炎症因子ＩＬ－１及肿瘤坏死因子（ＴＮＦ）对人肾小球系膜细胞（ＨＭＣ）分泌ＩＬ－８的影响。方法：体外细胞培养技术及ＥＬＩＳＡ夹心法。结果：ＩＬ－１、ＴＮＦ均可诱导ＨＭＣ分泌ＩＬ－８，并呈剂量依赖性。结论：在一些炎症因子刺激下，ＨＭＣ可能通过分泌趋化因子ＩＬ－８参与肾脏炎症反应的启动和维持     

人类胚胎生殖细胞体外分化为心肌细胞的研究

胚胎生殖（EG）细胞是来源于胚胎原始生殖细胞（PGCs）的多潜能干细胞。采用无饲养层细胞、无细胞因子等的基础培养液（DMEM＋20％NBS＋0．1mM 2Me）培养EG细胞，部分在基础培养液添加10μmol／LRA＋0．75％DMSO或10μmol／L 5-氮胞苷（5-AZA）诱导人类EG细胞向心肌细胞分化，以检测其是否具有向心肌细胞自发分化的能力。9例（8．49％，9／106）胎儿EG细胞在体外分化得到20个节律性心脏跳动样细胞团，其搏动节律为20～120次／min，体外维持节律性搏动最短2d，最长至15d，呈PAS，Myoglobin，α-actin阳性；对K^＋、Ca^＋、肾上腺素等具有与在体心脏相似的反应性；透射电镜观察具有心肌细胞样结构。添加DMSO和RA或5-AZA诱导未得到跳动样心肌细胞，但可提高心肌α-actin免疫组织化学染色阳性率；表明人类胚胎生殖细胞具有向心肌细胞分化的潜能。     

The Impact of Positive Youth Development Attributes on Posttraumatic Stress Disorder Symptoms Among Chinese Adolescents Under COVID-19

PurposeThis study examined the prevalence of posttraumatic stress disorder (PTSD) symptoms among adolescents in mainland China under COVID-19. The direct effects of the perceived threat of COVID-19 and positive youth development (PYD) qualities, as well as the moderating effect of PYD qualities on PTSD symptoms, were studied.MethodsFive schools in Chengdu, Sichuan, China, participated in this study. Two waves of data were collected before school lockdown (Wave 1, between December 2019 and January 2020) and after school resumption (Wave 2, between June 2020 and July 2020), respectively. A total of 4,981 adolescents aged above 11 years (Mean age = 13.15, SD = 1.32 at Wave 1, 51.5% girls) completed questionnaires at both waves. Students responded to measures of PYD qualities at both waves and perceived threat and PTSD symptoms at Wave 2.ResultsA total of 517 adolescents (10.4%) could be regarded as having PTSD. Results indicated significant unique main effects of perceived threat (β = .13, p < .001) and Wave 1 PYD qualities (β = ?.16, p < .001) on PTSD symptoms. Besides, results showed a significant moderating effect of PYD qualities in mitigating the negative impact of perceived threat on PTSD symptoms.ConclusionsThis study revealed the protective effect of PYD attributes in reducing the negative influence of traumatic situations such as COVID-19 on adolescent mental health. Results underscore the importance of promoting PYD qualities in adolescents in mainland China via effective PYD programs.     

Isolation of Nanjing local strains of HHV-7 and their biological and immunological characteristics

To investigate the biological and immunological characteristics of the Nanjing local strains of HHV-7,fourstrains of herpesvirus were isolated from saliva specimens of one healthy individual and three childrensuffering from a kidney disease in Nanjing.The viruses were identified by transmission electron microscopy(EM),indirect immunofluorescence assay(IFA) with a specific monoclonal antibody;nested polymerase chainreaction,restriction mapping and DNA sequencing.The virus-infected cells showed the typical cytophathiceffect(CPE) under microscopy and could be detected by IFA with the human herpesvirus-7(HHV-7) specificantibody.Under EM,herpesvirus-like and virions capsids could be found in their cytoplasm or nucleoplasm.HHV-7 DNA fragments amplified from infected cells by nested PCR were confirmed by restriction mappingand DNA sequencing.Similarly to DC strain,an known HHV-7 strain used in the present study as the positivecontrol,the virus could be inactivated by ultraviolet irradiation for 10 min,heated at 45℃ for 30 min,pH<5or>9 at 4℃ for 2 h and ether or chloroform for 10 h.The virus induced the production of TNF-α,IL-10 andIL-12p70 while inhibited IFN-γ secretion,increased the percentage of CD2~+ cells while decreased that of CD4~+or CD45RA~+ cells.The results indicate that the viruses isolated in Nanjing are HHV-7,which has similarbiological characteristic to the known HHV-7 strain,DC.Infection with HHV-7 in vitro could affect immunefunction of lymphocytes by disturbing cytokine production and CD antigen expression.Cellular & MolecularImmunology.2004;1(5):367-372.     

p16与c-myc基因表达产物在肝细胞癌及癌旁组织中的表达及临床意义

目的：探讨ｐ１６、ｃ－ｍｙｃ蛋白与肝细胞癌（ＨＣＣ）的发生、发展及恶性程度的关系。方法：应用免疫组织化学法检测了６９例ＨＣＣ和６３例癌旁组织ｐ１６及ｃ－ｍｙｃ蛋白的表达,并结合临床资料进行分析。结果：ｐ１６蛋白主要分布在胞浆,少数细胞核内也可见阳性显色。ｃ－ｍｙｃ蛋白主要分布在胞核。ｐ１６蛋白在肝癌组织及癌旁组织中的阳性率分别为２６．５％（１８／６９）和９２％（５８／６３）,两者比较差异显著（Ｐ〉     

肝移植术后出凝血功能的调控

目的：探讨肝移植术后出凝血功能的调控方法及意义。方法：通过１１ 例活体肝部分移植术病例,介绍术后出凝血功能的监测指标及调控方法。结果：肝移植术后出凝血功能调控的目标为维持血压、脉搏相对稳定,控制下列指标在一定范围内。 Ｈｂ ：９０ ～１１０ｇ／ Ｌ, Ｈｔ：２５ ％ 上下, Ｐ Ｌ Ｔ：３０ ～５０ ×１０９／ Ｌ, Ｐ Ｔ：１５ ～２０ｓ , Ａ Ｃ Ｔ：１５０ ～２００ｓ,调控手段是依据上述指标补充凝血因子或使用扩血管剂或抗凝剂。结论：本研究所介绍的方法能有效防止肝移植术后的出血和血栓形成。