Regulatory Role of Supramolecular Alcohol Dehydrogenase and Lactate Dehydrogenase Complex in Cell Mitochondria

The existence of a supramolecular alcohol dehydrogenase–lactate dehydrogenase complex was demonstrated. Enzyme activities were evaluated in a preparation of mitochondrial membranes from mouse liver. The role of the enzyme complex (alcohol dehydrogenase–lactate dehydrogenase) in the regulation of pyruvate and acetaldehyde metabolism in the cell was studied.     

肾癌中原癌基因EphB4及其蛋白表达的研究

目的：研究人肾癌组织中EphB4基因及其蛋白的表达及其在肾癌发生、发展中的作用和临床意义。方法：取液氮保存的原发性肾癌新鲜标本40例,相应癌旁组织（阴性切缘）40例,正常肾脏组织30例,采用半定量逆转录PCR（RTPCR）和免疫组化SP法检测EphB4基因及其蛋白表达水平,并结合临床病理资料进行分析。结果：EphB4基因在肾癌组织和癌旁组织中都表达,且癌旁表达低于肿瘤表达,差异有统计意义（P〈0．05）;正常肾脏组织不表达（P〈0．01）;40例肾癌标本中,25例EphB4蛋白表达阳性,阳性率为62．5％,40癌旁组织中,10例EphB4蛋白表达阳性,阳性率为25．0％;两者有显著差异性（P〈0．05）。EphB4蛋白的表达与患者的性别、年龄无关（P〉0．05）,但与肿瘤浸润深度、肿瘤分化程度、淋巴结转移密切相关（P〈0．05）。结论：原癌基因EphB4及其蛋白在人肾癌组织中过度表达,且与肾癌的发生,发展相关,可能成为肾癌预后的侯选标志物之一。     

去白细胞血预充对婴儿体外循环的肺保护作用

目的 研究去白细胞血预充对围体外循环期(CPB)婴儿肺功能的影响.方法 60例＜1岁室间隔缺损患儿,随机分成实验组和对照组,实验组用去白细胞血预充,对照组用常规库血预充.检测 CPB开始前、CPB结束后2、6、12、24和48h 6个时点的氧合指数(OI)、动脉血氧分压/肺泡氧分压(PaO2/PAO2)、肺泡-动脉氧分压差(A-aDO2)和呼吸指数(RI)等肺功能指标.结果 OI、PaO2/PAO2在CPB后2h、6h、12h时点实验组高于对照组(P＜0.01,P＜0.05);A-aDO2在CPB后2h、6h、12h、48h时点实验组低于对照组(P＜0.01,P＜0.05);RI在CPB后6h、12h实验组低于对照组(P＜0.01,P＜0.05).结论 去白细胞血预充可改善围体外循环婴儿早期肺脏的氧合功能,具有良好的肺保护作用.     

In vitro atrazine exposure affects the phenotypic and functional maturation of dendritic cells

Recent data suggest that some of the immunotoxic effects of the herbicide atrazine, a very widely used pesticide, may be due to perturbations in dendritic cell (DC) function. As consequences of atrazine exposure on the phenotypic and functional maturation of DC have not been studied, our objective was, using the murine DC line, JAWSII, to determine whether atrazine will interfere with DC maturation. First, we characterized the maturation of JAWSII cells in vitro by inducing them to mature in the presence of growth factors and selected maturational stimuli in vitro. Next, we exposed the DC cell line to a concentration range of atrazine and examined its effects on phenotypic and functional maturation of DC. Atrazine exposure interfered with the phenotypic and functional maturation of DC at non-cytotoxic concentrations. Among the phenotypic changes caused by atrazine exposure was a dose-dependent removal of surface MHC-I with a significant decrease being observed at 1 microM concentration. In addition, atrazine exposure decreased the expression of the costimulatory molecule CD86 and it downregulated the expression of the CD11b and CD11c accessory molecules and the myeloid developmental marker CD14. When, for comparative purposes, we exposed primary thymic DC to atrazine, MHC-I and CD11c expression was also decreased. Phenotypic changes in JAWSII DC maturation were associated with functional inhibition of maturation as, albeit at higher concentrations, receptor-mediated antigen uptake was increased by atrazine. Thus, our data suggest that atrazine directly targets DC maturation and that toxicants such as atrazine that efficiently remove MHC-I molecules from the DC surface are likely to contribute to immune evasion.     

新生儿期肝脏巨大血管瘤的外科诊治

目的探讨总结新生儿肝脏巨大血管瘤的外科诊治经验。方法回顾深圳市儿童医院 2014—2018年收治并采用外科手术治疗的 8例新生儿肝脏巨大血管瘤病例,分析其临床资料和外科治疗效果。结果 8例新生儿肝脏血管瘤首诊症状包括腹部包块、黄疸。 1例合并破裂出血、 6例合并动静脉瘘及严重的心衰表现, 1例合并呼吸衰竭。全部病例产后超声和 CT检查均有典型的血管瘤表现,单个病灶直径在 6.5～10 cm。所有病儿均接受手术并完整切除, 1例术后 1d出现胆漏,其他远期并发症随访期间尚未发现,手术效果良好。术后病理报告海绵状血管瘤 5例,血管内皮瘤 3例。术后随访 3～52个月,复查肿瘤均未复发,甲胎蛋白( AFP)恢复正常,所有病儿生长发育同正常儿。结论新生儿肝脏巨大血管瘤可通过临床表现、超声和 CT检查明确诊断。合并内科治疗棘手的破裂出血所致休克、心衰或者呼吸衰竭病儿,紧急手术治疗新生儿肝脏血管瘤是可行的,疗效满意。     

Recent progress in discovery and development of antimitotic agents

This review highlights structural diversity of antimitotic agents. In particular, we emphasized current antimitotic therapies based on modulation of microtubule dynamics. With several successful anticancer drugs on the market and numerous compounds in clinical developments, tubulin-binding agents remain among the most important categories of anticancer agents. Compounds targeting mitotic kinases and kinesins are also discussed.     

Experimental Investigation of the Emulsification Process in a Pulsed-Rotor Apparatus

Pharmaceutical Chemistry Journal -     

Comparing hyoscine and drotaverine effects on colon in CT colonography

Hyoscine and drotaverine effectiveness was compared for the purposes of achieving optimum distension following insufflation in CT colonography. The in vitro effects of hyoscine and drotaverine on tone and contractility of SM preparations isolated from different areas of human colon were studied by isometric registration of contractile activity. Both medications have a relaxing effect on SM preparations and inhibit their spontaneous contractions. The drotaverine-induced effects were reliably more marked than the hyoscine-induced ones. CT colonography was performed in 70 patients who were injected with equal doses of either hyoscine (n=32) or drotaverine (n=38). The degree of drug-induced distension in both groups was determined by measuring the lumen of the colon on a 2D reconstruction. In most colon areas the width of the distended lumen was greater in the drotaverine-treated patients. We concluded that drotaverine can be used as a means to facilitate colonic distension.