参杞合剂对小鼠腹水型肝癌细胞株H22细胞周期及凋亡的影响

目的：观察参杞合剂(SQ)在体内、外对小鼠腹水型肝癌细胞株(HcaF16A3)细胞周期及凋亡的影响。方法：用SQ对荷瘤小鼠连续胃饲治疗10d，观察其NK细胞／Mφ的杀伤活性及细胞周期的改变。用流式细胞仪检测SQ对HcaF16A3细胞增殖的抑制作用与诱导凋亡的作用。结果：SQ的抑瘤率为65．68％。流式细胞仪检测发现，SQ可使肿瘤细胞的细胞周期阻滞到S期，并在体外诱导其凋亡。结论：SQ在体内、外均有抑瘤作用，其机制与细胞周期阻滞继而诱发凋亡有关。     

人乳头瘤病毒多肽与人免疫球蛋白G融合表达

目的 将人乳头瘤病毒16型(Human papillomavirus type 16,HPV-16)的晚期表达蛋白E7上的抗原24肽(从第38位氨基酸到第61位氨基6病毒感染防治酸)与人免疫球蛋白G的重链恒定区融合表达,并以此融合蛋白作为抗原,可能为HPV-1提供免疫治疗方法。方法 利用PCR方法分别扩增HPV-16 E7(38-61)24肽的DNA片段和人免疫球蛋白G的重链恒定区DNA片段,并构建到pEV21a表达载体上,转化入E．coli中表达,利用SDS-聚丙烯酰胺凝胶电泳(SDS-PAGE)和蛋白质免疫印迹(Western-blotting)的方法对表达结果进行鉴定。结果 构建的表达载体HPV16E7e／hIgGHCCR-pET21a经酶切鉴定和测序显示序列正确;通过SDS-PAGE和Western-blotting的鉴定,重组融合蛋白Mr约40000,表达量可占菌体蛋白的20％左右。结论 成功构建HPV16-E7的抗原多肽片段和人免疫球蛋白G的重链恒定区的融合蛋白,并可在E．coli中高效表达。     

Crucial Role of CD4+CD 25+ FOXP3+ T Regulatory Cell,Interferon-γ and Interleukin-16 in Malignant and Tuberculous Pleural Effusions

The differential diagnosis between malignant and tuberculous exudative pleural effusions is an important clinical problem. The aim of current study is to evaluate the frequencies of T-regulatory cells (Treg) on the basis of distinct phenotypes in the differential diagnosis between malignant and tuberculous pleural effusion. In addition, to evaluate Interferon-gamma (IFN- γ) and interleukin-16 (IL-16) levels and their correlation to Treg cells in malignant and tuberculous pleural effusions. Sixty patients with pleural effusion (26 tuberculous and 34 malignant) and 20 healthy controls were included in the study. Pleural fluid and peripheral blood were assessed for frequencies of T regs, IL-16, and IFN-γ. Pleural effusions from both tuberculous and malignant groups represented significantly higher levels (more in TB) for the following cell populations than peripheral blood: total lymphocytes, CD3+lymphocyte, CD4+CD25+lymphocyte and Treg (CD4+ CD25+FoxP3+). Levels of IL-16 and IFN-γ in tuberculous group were significantly higher than that in malignant group. Regulatory T cells, INF-γ and IL-16 are new important tools for differentiation between tuberculous and malignant pleural effusion.     

Association between PARK16 and Parkinson's disease in the Han Chinese population: a meta-analysis

PARK16 was reported to alter the risk for Parkinson's disease (PD) in the Japanese population. However, its role in Han Chinese PD patients has not been well established. Herein, we investigated the effect of 4 single-nucleotide polymorphisms (SNPs) within the PARK16 locus, including rs823128, rs947211, rs823156, and rs11240572, on the risk of PD by genotyping 497 Taiwanese patients with PD and 500 age-matched control subjects. The results were then meta-analyzed with available genetic association studies in the same population. The meta-analysis showed that PD patients demonstrated a lower frequency of the rs823128 G allele (11.93%) than control subjects (14.04%; odds ratio [OR] 0.83, 95% confidence interval [CI] 0.72–0.96, p = 0.010). The frequency of the rs947211 A allele (40.35%) in PD patients was lower than in control subjects (43.01%; OR 0.90, 95% CI 0.80–0.99, p = 0.047). The rs823156 G allele was less frequently seen in PD patients (17.32%) than in control subjects (21.35%; OR 0.77, 95% CI 0.69–0.86, p < 0.001). A lower frequency of the rs11240572 A allele was found in PD patients (14.01%) than in control subjects (17.66%; OR 0.76, 95% CI 0.66–0.88, p < 0.001). Our results indicate a robust protective effect of PARK16 in Han Chinese PD patients. Functional approaches are needed to elucidate the effects of these SNPs on the regulation of gene expression.     

滤泡性淋巴瘤分型、免疫表型和遗传学变异的研究进展

滤泡性淋巴瘤是最常见的低度恶性淋巴瘤,尽管在最新的WHO淋巴瘤诊断标准中被定义为单一性疾病,然而其临床表现却呈现很高的异质性。在病理形态学、免疫表型和遗传学变异方面同样表现出异质性。本文对此领域新的发现和观点做一综述。     

胃癌组织P16和P53蛋白表达的研究

目的研究胃癌组织中P16和P53蛋白的表达及临床意义。方法应用免疫组织化学方法,对57例胃癌组织和癌旁组织、38例正常胃组织中p16和p53基因表达产物进行检测,并结合临床进行讨论和分析。结果胃癌组织中P16蛋白的阳性率为21.1%（12/57）,明显低于癌旁组织59.6%（34/57）和正常胃组织89.5%（34/38,P〈0.05）;P53蛋白的阳性率为80.7%（46/57）,明显高于癌旁黏膜组织42.1%（24/57）和正常胃组织0%（0/38,P〈0.05）。P16和P53蛋白表达与胃癌组织学类型、浸润深度、分化程度及淋巴结转移有关（P〈0.05）。结论胃癌组织P16和P53蛋白的异常表达与胃癌发生发展、淋巴结转移和预后可能有关。     

The bacterial aetiology of pleural empyema. A descriptive and comparative metagenomic study

ObjectivesThe view of pleural empyema as a complication of bacterial pneumonia is changing because many patients lack evidence of underlying pneumonia. To further our understanding of pathophysiological mechanisms, we conducted in-depth microbiological characterization of empyemas in clinically well-characterized patients and investigated observed microbial parallels between pleural empyemas and brain abscesses.MethodsCulture-positive and/or 16S rRNA gene PCR-positive pleural fluids were analysed using massive parallel sequencing of the 16S rRNA and rpoB genes. Clinical details were evaluated by medical record review. Comparative analysis with brain abscesses was performed using metagenomic data from a national Norwegian study.ResultsSixty-four individuals with empyema were included. Thirty-seven had a well-defined microbial aetiology, while 27, all of whom had community-acquired infections, did not. In the latter subset, Fusobacterium nucleatum and/or Streptococcus intermedius was detected in 26 patients, of which 18 had additional facultative and/or anaerobic species in various combinations. For this group, there was 65.5% species overlap with brain abscesses; predisposing factors included dental infection, minor chest trauma, chronic obstructive pulmonary disease, drug abuse, alcoholism and diabetes mellitus. Altogether, massive parallel sequencing yielded 385 bacterial detections, whereas culture detected 38 (10%) and 16S rRNA gene PCR/Sanger-based sequencing detected 87 (23%).ConclusionsA subgroup of pleural empyema appears to be caused by a set of bacteria not normally considered to be involved in pneumonia. Such empyemas appear to have a similar microbial profile to oral/sinus-derived brain abscesses, supporting spread from the oral cavity, potentially haematogenously. We suggest reserving the term ‘primary empyema’ for these infections.     

Molecular diagnosis of a vascular prosthesis infection, due to Propionibacterium acnes, by amplification and sequencing of 16S rDNA

We describe a case of indolent vascular prosthesis infection due to Propionibacterium acnes. The microorganism was identified only by amplification and sequencing of 16S rDNA, while standard cultures remained negative. This observation underscores the usefulness of molecular techniques for the diagnosis of infection caused by fastidious microorganisms.     

湖北省手足口病肠道病毒71型和柯萨奇病毒A组16型VP1基因特征

目的 了解湖北省手足口病肠道病毒71型（EV71）和柯萨奇病毒A组16型（Cox A16）的VP1基因特点,研究该省EV71和Cox A16的基因型别及分子进化特征。方法 对2014-2015年湖北省26株EV71和27株Cox A16流行株的VP1基因测序,分析其同源性和遗传进化特征。结果 2014-2015年湖北省EV71和Cox A16流行株VP1核苷酸和蛋白氨基酸序列同源性均较高,EV71流行株的蛋白氨基酸和核苷酸序列同源性分别为97.6%~100.0%和92.3%~100.0%。Cox A16流行株的蛋白氨基酸和核苷酸序列同源性分别为96.6%~100.0%和92.3%~100.0%。EV71的VP1基因系统进化分析表明,湖北省流行的EV71与我国其他地区流行的EV71均位于一个大的分支上,均为C4基因型的C4a亚型。Cox A16流行株与B1b亚型代表株位于同一分支上,主要为B1b亚型。结论 2014-2015年湖北省EV71和Cox A16流行株分别为C4a亚型和B1b亚型,其核苷酸和氨基酸与国内外其他地区的手足口病病毒株均有较高同源性。