Flt3L与CCL5细胞因子佐剂对HBc抗原DNA疫苗特异性免疫应答的促进作用

观察真核重组表达质粒pFlt3L及pCCL5对携带HBc抗原的DNA疫苗诱导的抗原特异性免疫应答的促进作用。将pFlt3L及pCCL5分别用脂质体的方法转染Hep G2细胞,然后采用骨髓细胞增殖及趋化小室实验检测细胞上清Flt3L及CCL5两种细胞因子的生物学活性。将pFlt3L和pCCL5两种重组质粒单独或联合使用与携带HBc抗原的DNA疫苗经肌内注射法免疫小鼠,采用MTT法检测脾淋巴细胞增殖、流式细胞仪检测脾CD8+T淋巴细胞中IFN-γ表达、ELISA法检测脾淋巴细胞培养上清IL-4含量及乳酸脱氢酶(LDH)释放法检测特异性CTL杀伤活性。结果:骨髓细胞增殖及趋化实验证实了Flt3L及CCL5均有生物学活性。pFlt3L和pCCL5单独或联合使用均可促进特异性淋巴细胞增殖反应(P<0.05),提高小鼠脾脏CD8+T淋巴细胞中IFN-γ表达量(P<0.05或P<0.01),IL-4表达水平在各组无显著区别(P>0.05),Flt3L+CCL5组小鼠脾细胞特异性CTL活性显著高于其他各组(P<0.05)。pFlt3L和pCCL5表达质粒联用可显著促进小鼠Th1型细胞因子的表达,并对带HBc抗原的DNA疫苗的免疫应答具有促进作用。     

新疆汉族和维吾尔族健康人群VKORC1启动子区基因多态性研究

目的了解VKORC1—1639A／G基因多态性在新疆汉族和维吾尔健康人群中的分布及其与国外其他不同民族之间的差异。方法采用PCR—RFLP技术对205名汉族和204名维吾尔族乌鲁木齐地区体检健康者VKORC1—1639A／G基因多态性进行检测，计算其基因型和等位基因频率，并与国外多个民族VKORC1—1639A／G基因多态性分布进行比较。结果新疆汉族和维吾尔族健康人群中共检测到2种等位基因：A和G。汉族A和G等位基因频率分别为87％和13％，维吾尔族A和G等位基冈频率分别为62％和38％。新疆汉族和维吾尔族健康人群VKORC1—1639A／G基因多态性共检测到3种基因型，新疆汉族健康人群以AA基因型常见，基因型频率74％。其次是AG基因型，基因型频率分别为26％。GG基因型的个体仅检测到1例，基因型频率小于1。新疆维吾尔族健康人群以AG基因型常见，基因型频率58％。其次是AA基因型，基因型频率分别为33％。GG基因型频率为9％。结论新疆汉族VKORC1—1639A／G基因多态性以AA基因型为主。维吾尔族VKORC1—1639A／G基因多态性以AG基因型为主，新疆汉族VKORC1—1639A／G基因多态性分布与维吾尔族人群和欧美人群存在较大差异。新疆维吾尔族人群VKORC1—1639A／G基因多态性分布与欧关人群接近。     

Trisomy 17p due to a t(8; 17) (p23; p11.2)pat translocation. Case report and review of the literature

We describe a female newborn girl with partial trisomy 17p, which was not detected at the initial cytogenetic investigation, but which later proved to be an unbalanced product of a paternal translocation t(8; 17)(p23;pl 1.2). Comparison with the three previously reported patients suggests a clinically distinct "trisomy 17p syndrome", i.e. pre- and postnatal growth retardation, microcephaly, antimongoloid slanting of palpebral fissures, hypertelorism, long philtrum with thin upper lip, micrognathia and high-arched palate. Two of the four patients had a heart defect, and psychomotor developmental delay was evident in all four cases. In the present patient, the chromosomal anomaly was only detected after the finding of the autosomal reciprocal translocation in the father. The importance of cytogenetic investigations in parents of a MCA/MR child with apparently normal chromosomes is emphasized.     

Blood endotyping distinguishes the profile of vitiligo from that of other inflammatory and autoimmune skin diseases

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<Emphasis Type="Italic">Saccharomyces cerevisiae</Emphasis> Ats1p interacts with Nap1p,a cytoplasmic protein that controls bud morphogenesis

Saccharomyces cerevisiae ATS1 (-tubulin suppressor 1) was originally identified as a high-copy suppressor of class two -tubulin mutations and was proposed to have a regulatory role in coordinating the microtubule state with the cell cycle. Here, we show that Ats1p interacts with Nap1p, a cytoplasmic protein that regulates the activity of the Cdc28p/Clb2p complex. Loss of Nap1p results in a delayed switch from polar to isotropic bud growth. The delayed switch results in elongated buds. Nap1p and Ats1p interact in two-hybrid and co-immunoprecipitation assays. Both nap1 and ats1 cells have a Clb2p-dependent elongated bud morphology. Deletion of ATS1 partially suppresses the elongated bud morphology and benomyl resistance of nap1 mutants. Our results suggest Ats1p might regulate coordination of the microtubule state with the cell cycle through an interaction with Nap1p.Communicated by S. Hohmann     

高效毛细管电泳法分离多巴胺和5-羟色胺

建立毛细管电泳分离分析多巴胺和 5一羟色胺的方法。采用自由区带电泳法 (CZE) ,4 0mmol/L硼砂缓冲液 2 0PSI气压进样 5s ,定电流 75 μA分离 10min ,二极管阵列PDA检测器检测 ,应用 2 0 0nm检测波长 ,结果显示两种物质完全分离。     

模拟腰椎前路、后路间盘摘除术T12-L5腰段脊柱应力松弛蠕变实验研究

研究了18例新鲜尸体T12－L5腰段脊柱应力松弛，蠕变特性。测定了完整脊柱（正常组）及模拟前路（对照1组），后路手术（对照2组）腰段脊柱的应力松弛和蠕变效应，得出了在恒应变，应力条件下应力－时间曲线及数据，用回归分析的方法处理实验数据，得出了归一化应务松弛，蠕变函数及曲线，对前路间盘摘除术与后路间盘摘除术对脊柱粘弹性的影响进行分析讨论。     

NADPH oxidase priming and p47phox phosphorylation in neutrophils from synovial fluid of patients with rheumatoid arthritis and spondylarthropathy

Superoxide anion (O2°-)production by neutrophil NADPH oxidase participates in arthritic joint lesion formation. Proinflammatory cytokines such as tumor necrosis factor (TNF), interleukin 8 (IL-8) and granulocyte/macrophage-colony stimulating factor (GM-CSF) have a priming effect on neutrophil NADPH oxidase activity. NADPH oxidase activation is dependent on phosphorylation of p47phox, a cytosolic component of the enzyme. We studied O2°-production and p47phox phosphorylation in synovial fluid (SF) from patients with rheumatoid arthritis (RA) and spondylarthropathy (SpA) according to TNF, IL-8 and GM-CSF levels. O2°-production by neutrophils isolated from SF of all the arthritis patients (RA and SpA) was higher than that of circulating resting neutrophils and when stimulated with fMLP or PMA. In addition, p47phox was partially phosphorylated in SF neutrophils compared to circulating neutrophils. High levels of TNF and IL-8 (but not GM-CSF) are detected in patient's SF (compared to circulating blood levels). TNF levels were significantly higher in RA than in SpA SF. These results suggest that increased NADPH oxidase activity could be involved in arthritic joint inflammation through increased p47phox phosphorylation. This could be the result of the presence of high levels of priming agents such as TNF and IL-8 but not GM-CSF.