肺癌患者化疗前后血清Hcy、IGF-Ⅱ和TSGF检测的临床意义

目的：探讨肺癌患者化疗前后血清Hcy、IGF-Ⅱ和TSGF水平的变化及临床意义。方法：应用免疫法和放射免疫分析对35例肺癌患者进行了血清Hcy、IGF-Ⅱ和TSGF含量检测,并与30名正常健康人作比较。结果：肺癌患者在化疗前血清Hcy、IGF-Ⅱ和TSGF水平均非常显著地高于正常人组（P〈0.01）,化疗后6个月在未复发的27例中明显下降接近于正常人组,而复发的8例,其数值又回升至化疗前水平（P〈0.05）。结论：检测肺癌患者血清Hcy、IGF-Ⅱ和TSGF水平的变化可作为诊断和疗效观察的参考。     

艾滋病自愿咨询检测行为影响因素调查

目的了解大众艾滋病相关认知水平对于自愿咨询检测（VCT）的影响，为VCT的社区倡导提供依据。方法限定时段内对于自愿咨询检测门诊的求询者和整群抽取的社区居民进行包括人口学特征、艾滋病相关认知、VCT需求和行为的调查。采用描述性统计和Logistic回归对资料进行分析。结果VCT对传播途径的认知水平（Z=3．24314，P=0．0012）和公共卫生焦虑程度（Z=1．92708，P=0．0540）明显高于社区居民。对于存在感染风险者，主要影响其自愿咨询检测行为的是性别（OR=0．051，P=0．0001）、传播途径认知水平（OR=12．161，P=0．0264）、应对病毒的自我效能感（OR=3，252，P=0．0343）和流行现状焦虑（OR=1．576，P=0．0305）等。结论人口学特征对于合理检测行为的影响并非关键，在VCT社区倡导中要加强流行状况的介绍提高防治紧迫感，详细解释传播风险以提高风险自觉性，同时通过介绍HIV的防治方法以提高应对病毒的自我效能感也有助于促进自愿咨询检测。     

妊高征患者治疗前后血清TNF-α、IL-6和IL-8检测的临床意义

目的：探讨了妊高征患者治疗前后血清TNF-α、IL-6和IL-8水平的变化及意义。方法：采用放射免疫分析对36例妊高征患者进行了血清TNF-α、IL-6和IL-8水平检测并与35名正常孕妇作比较。结果：在治疗前血清TNF-α、IL-6和IL-8水平非常显著地高于正常孕妇组（P〈0．01），经治疗后2周，血清TNF-α、IL-6和IL-8水平与正常孕妇组比较，无显著性差异（P〉0．05）。结论：炎性细胞因子TNF-α、IL-6和IL-8在妊高征的发病机理中具有重要的作用，有一定的临床价值。     

HLA antigens in uveitis

HLA antigens are associated with a number of inflammatory eye diseases, most notably HLA B2 with anterior uveitis (AU). This association varies between different populations and ethnic groups. The aim of this study was to investigate the relationship between uveitis and HLA A, B and DR locus antigens in an Australian population. Seventy-two consecutive patients with uveitis were studied (37 males and 35 females) over a 6 month period. Thirty-two percent of the AU patients were HLA B27+, as were 42% of males (19% females) with their first attack of AU compared with 60% of males (23% females) with recurrent AU. The only significant difference in etiology between males and females was the greatly increased incidence of rheumatic diseases in males, in whom 77% (10/13) had radiological evidence of sacroiliitis. Additional findings included a lack of association between the HLA B7 cross reactive group and DR locus antigens in AU as well as the lack of any HLA associations in the 13 patients with posterior uveitis (PU).     

成人骨髓间充质干细胞对造血干细胞体外增殖的影响

目的研究骨髓间充质干细胞（MSC）对脐带血（CB）CD34^＋细胞体外增殖和造血重建能力的影响。方法取人骨髓单个核细胞贴壁培养．梭形细胞完全融合后传代，用流式细胞仪检测免疫表型；将CBCD34^＋细胞接种到MSC或其他培养液中．比较不同培养条件对造血干细胞扩增能力、集落形成能力及黏附分子表达的影响。结果在加入IL-3的培养体系中．在MSC和细胞因子作用下，CD34^＋细胞扩增7d和14d后，有核细胞（NC）、CD34^＋细胞和CDl33^＋细胞数，实验组均显著多于对照组。CD34＋细胞在未加入IL-3的培养体系中培养8d后，实验组NC、CD34^＋细胞、CD34^＋CD38-细胞和造血祖细胞集落扩增倍数均显著高于对照组。扩增后CD34^＋细胞的ALCAM、VLA-α4、VLA-α5、VLA-β1、HCAM、PECAM和LFA-1表达较扩增前无显著变化。结论MSC可为造血干细胞（HSC）体外扩增提供适宜的微环境，有助于CD34^＋细胞体外增殖并抑制HSC分化，保持其造血重建潜能和归巢能力。     

慢病毒介导的外源基因体外投递系统的建立

目的针对不同哺乳类细胞建立相应的慢病毒体外感染体系，以建立慢病毒介导的外源基因体外投递系统。方法按Invitrogen公司推荐的标准程序进行慢病毒（携带EGFP基因）包装（脂质体介导的瞬时转染）、超速离心浓缩和保存等，随后用病毒上清或浓缩后的病毒感染293FT细胞，24—48h后荧光显微镜下观察是否见绿色荧光以证实慢病毒是否成功生产；将携带EGFP基因的病毒上清或浓缩后的病毒分别加入内含293FF细胞、小鼠ES细胞、小鼠胚胎成纤维细胞（MEFs）或小鼠睾丸生殖细胞的培养板孔内，感染6—12h后，用相应培养基替换感染液，数天后荧光显微镜下观察是否见绿色荧光以证实慢病毒是否成功感染不同哺乳类细胞。结果按标准程序生产的携带EGFP基因慢病毒（病毒上清或浓缩后的病毒）成功高效率感染293FF细胞、MEFs或小鼠睾丸生殖细胞；用浓缩后的病毒（携带EGFP基因）感染小鼠ES细胞，亦可获得EGFP阳性的ES细胞克隆。结论熟练掌握了慢病毒包装、浓缩及鉴定等技术，同时针对不同哺乳类细胞建立了相应的慢病毒介导的外源基因体外传递系统，这些为相关后续研究打下了良好的基础。     

慢性丙型肝炎患者血清IGF-Ⅰ水平与血清HA、PⅢP关系的探讨

目的：探讨了慢性丙型肝炎患者血清IGF-Ⅰ水平及其与血清HA、PⅢP的关系。方法：采用放射免疫分析对39例慢性丙型肝炎患者进行了血清IGF-Ⅰ和HA、PⅢP含量测定，并与35名正常健康人作比较。结果：慢性丙型肝炎患者血清IGF-Ⅰ水平与HA、PⅢP水平呈明显正相关（r=0．8018、0．7126，P〈0．01）。结论：检测慢性丙型肝炎患者血清IGF-Ⅰ和HA、PⅢP水平的变化对疾病的诊断、治疗是一个十分有用的临床检测指标。     

慢性丙型肝炎患者血清leptin含量与HA、PⅢP水平的相关分析

目的：探讨了慢性丙型肝炎患者血清leptin含量与HA、PⅢP水平的关系。方法：应用放射免疫分析对32例慢性丙型肝炎患者进行了血清leptin和HA、PⅢP水平检测，并与35名正常健康人作比较。结果：慢性丙型肝炎患者血清leptin和HA、PⅢP水平均非常显著地高于正常人组（P〈0．01），相关分析显示，血清leptin与HA、PⅢP水平呈明显的正相关（r=0．6178．0．5706，P〈0．01）。结论：慢性丙型肝炎患者血清leptin水平的升高与肝脏炎症病变严重程度有关，leptin测定可作为—个判断肝脏炎症严重程度的指标，具有重要的临床价值。     

超高效液相色谱-串联质谱法同时快速检测微量血清中6种脂溶性维生素

目的 建立超高效液相色谱-串联质谱法（UPLC-MS/MS）同时快速检测微量血清中维生素A、维生素D（25-OH-VD2 、25-OH-VD3 ）、维生素E（α-、β-和γ-生育酚）的方法。方法 血清中脂溶性维生素经甲醇-乙腈（50:50, v/v)沉淀蛋白、正己烷萃取,以Phenomenex Kinetex F5色谱柱为分离柱,2.5 mmol/L甲酸铵-0.1%甲酸水溶液和甲醇为流动相,梯度洗脱,电喷雾电离（ESI+ ）、多反应监测（MRM）模式下检测,同位素内标法定量。结果 血清中6种脂溶性维生素线性范围内线性关系良好,相关系数 r >0.995;6种脂溶性维生素的检测限为0.20~1.25 ng/ml,定量限为0.39~3.88 ng/ml;加标回收率为86.6%~107.7%,日内精密度<9.6%,日间精密度<9.3%。NIST标准参照品SRM 968f验证方法准确度,结果偏差均在5%以内。结论 本方法准确度高、重现性好、用血量少,适于婴幼儿等采血困难者微量血样中多种脂溶性维生素的同时快速检测。     

A phase IIA extension study evaluating the effect of booster vaccination with a fractional dose of RTS,S/AS01E in a controlled human malaria infection challenge

BackgroundWe previously demonstrated that RTS,S/AS01_B and RTS,S/AS01_E vaccination regimens including at least one delayed fractional dose can protect against Plasmodium falciparum malaria in a controlled human malaria infection (CHMI) model, and showed inferiority of a two-dose versus three-dose regimen. In this follow-on trial, we evaluated whether fractional booster vaccination extended or induced protection in previously protected (P-Fx) or non-protected (NP-Fx) participants.Methods49 participants (P-Fx: 25; NP-Fx: 24) received a fractional (1/5th dose-volume) RTS,S/AS01_E booster 12 months post-primary regimen. They underwent P. falciparum CHMI three weeks later and were then followed for six months for safety and immunogenicity.ResultsOverall vaccine efficacy against re-challenge was 53% (95% CI: 37–65%), and similar for P-Fx (52% [95% CI: 28–68%]) and NP-Fx (54% [95% CI: 29–70%]). Efficacy appeared unaffected by primary regimen or previous protection status. Anti-CS (repeat region) antibody geometric mean concentrations (GMCs) increased post-booster vaccination. GMCs were maintained over time in primary three-dose groups but declined in the two-dose group. Protection after re-challenge was associated with higher anti-CS antibody responses. The booster was well-tolerated.ConclusionsA fractional RTS,S/AS01_E booster given one year after completion of a primary two- or three-dose RTS,S/AS01 delayed fractional dose regimen can extend or induce protection against CHMI.Clinical Trial Registration: NCT03824236.A video linked to this article can be found on the Research Data as well as Figshare https://figshare.com/s/ee025150f9d1ac739361