豨莶脂溶性成分的研究

从豨莶(Siegesbeckia orientalis L.)的地上部分,分离出八个化合物,其中I和I根据理化性质和光谱数据确定其结构为ent-17-acetoxy-18-isobutyryloxy-16(α)-kauran-19-oicacid(I)和ent-17-ethoxy-16(α)-kauran-19-oicacid(II),均为新化合物,分别被命为豨莶酯酸(siegesesteric acid,I)和豨莶醚酸(siegesetheric acid,I)。其余化合物分别鉴定为腺梗豨莶萜醇酸(ent-16β,17-dihydroxy-kauran-19-oicacid,II),奇任醇(kirenol,IV,β-谷甾醇葡萄糖甙(β-sitosterolglucoside,V),二十一醇(heneicosanol,VI),花生酸甲酯(methyl arachidate,VII)和β-谷甾醇(β-sitosterol,VII)。除奇任醇和β-谷甾醇外,均为首次从该植物中分得。     

十名志愿者口服维拉帕米缓释片药代动力学和心电图研究

对10名男性受试者单剂量po240mgVer缓释片药代动力学及心电图变化进行研究。血药浓度—时间数据用零级吸收过程的一室模型拟合,其药代动力学参数:T_max5.9±1.6h;C_max118.9±37.2μg·L^-1;T₁ 5.4±1.5h;k₀30.5±17.5μg·L^-1·h^-1;T_1/210.8±4.9h。PR间期延长有显著意义,血药浓度与PR间期变化满足S 型模型,其药效学参数:EC₅₀ 64.6±16.9μg·L^-1; E_max54±11ms;s 1.68±0.66。     

个性化护理干预对妇科恶性肿瘤手术后生活质量的影响

[目的]探讨个性化护理干预对妇科恶性肿瘤手术后生活质量的影响。[方法]将46例在我科因妇科恶性肿瘤手术的患者随机分为实验组和对照组，通过实施个性化护理干预，对两组患者进行SF-36量表和Olson婚姻质量问卷进行测评。[结果]对妇科恶性肿瘤手术后患者进行个性化护理干预后其生活质量明显提高，差异有显著性意义（P〈0．01）。[结论]个性化护理干预能提高妇科恶性肿瘤手术后生活质量。     

BaP通过AhR和Nrf2信号通路对HepG2细胞中GSTP1的影响

摘要：目的：探究苯并芘（benzo[a]pyrene,BaP）通过芳香烃受体（aryl hydrocarbon receptor,AhR）和核因子E2相关因子（subcellular localization of nuclear factor?E2-related factor 2,Nrf2）信号通路对HepG2细胞中谷胱甘肽-S-转移酶P1（glutathione S-transferase P1,GSTP1）的影响。方法：将体外培养HepG2细胞分为Control组、BaP（10μmol/L）组、BaP（10μmol/L）+AhR抑制剂（1μmol/L）组和BaP（10μmol/L）+Nrf2抑制剂（1μmol/L）组,BaP组给予10μmol/LBaP培养24小时,抑制剂组给予1μmol/L抑制剂半小时后,加入10μmol/L BaP培养24小时,Western Blot和qPCR实验方法检测各组AhR、Nrf2、细胞色素P450s（cytochrome P450s,CYPs）、血红素加氧酶-1（heme oxygenase-1,HO-1）及GSTP1基因和蛋白的表达。结果：与Control组相比,BaP组中AhR、Nrf2、GSTP1、CYP1A1及HO-1的mRNA和蛋白表达均升高（P<0.05）;与BaP组相比,BaP+AhR抑制剂组中AhR、GSTP1和CYP1A1的mRNA和蛋白表达均降低（P<0.05）,BaP+Nrf2抑制剂组中Nrf2、GSTP1和HO-1的表达均降低（P<0.05）;与BaP+AhR抑制剂组相比,BaP+Nrf2抑制剂组GSTP1 mRNA和蛋白的表达降低（P<0.05）。结论：BaP通过AhR和Nrf2两条信号通路增加GSTP1的表达,以Nrf2信号通路为主导影响GSTP1的表达。     

Safety and efficacy of oral nemonoxacin versus levofloxacin in treatment of community-acquired pneumonia: A phase 3, multicenter,randomized, double-blind,double-dummy,active-controlled,non-inferiority trial

Background/Purpose

Nemonoxacin is a novel nonfluorinated quinolone with excellent in vitro activity against most pathogens in community-acquired pneumonia (CAP), especially Gram-positive isolates. The purpose of this study was to assess the efficacy and safety of nemonoxacin compared with levofloxacin in patients with CAP.

The effects of sodium butyrate,an inhibitor of histone deacetylase,on the cocaine- and sucrose-maintained self-administration in rats

In order to substantiate the concept that cocaine behavioral effects may be influenced by histone modification, rats were trained to self-administer cocaine intravenously (0.75 mg/(kg injection)), and were systemically pretreated with sodium butyrate (NaBu), a potent histone deacetylase inhibitor, before the test session during the maintenance phase. The effect of NaBu on a control reinforcer (sucrose)-induced self-administration was also assessed. NaBu (100–200 mg/kg) was inactive in altering the cocaine (0.75 mg/(kg injection))-maintained responding and at the highest dose (400 mg/kg) it did increase cocaine-induced lever presses during the maintenance phase. On the other hand, sucrose-reinforcing potential was not altered when NaBu was given at the highest dose (400 mg/kg). These findings extend previous observations that changes in histone acetylation are relevant to cocaine-induced behavioral effects. Given that histone acetylase inhibitor enhances cocaine-induced behavioral plasticity, the therapeutic benefits of histone acetyltransferase inhibitors warrant further investigation in the experimental models of cocaine abuse.     

Three‐Dimensional Reconstruction of the Optic Canal‐Based on Multislice Helical CT: A Comparison Analysis with Skull Dissection of 40 Postmortem Cases

Decompression operation of the optic canal via the nasal path under endoscope is widely used, but it is both a challenging and controversial method. Unsatisfactory results were largely associated with otolaryngologists' limited understanding of the real anatomical situations of the optic canal before operation. To provide otolaryngologists with the real situations and data preoperation, multislice helical CT was used to reconstruct the images of the optic canal. Using multislice helical CT‐aided three‐dimensional reconstructive methods in combination with direct anatomic measurement, we dissected and analyzed the shape of the optic canal and its anatomic relationship with the adjoining structures in 40 intact postmortem skull samples. The In‐Space technique clearly showed the structure and the related region of the optic canal. The virtual endoscopy technique showed superbly the spatial appearance and topography of the inner optic canal and also gave the inner structure of the optic canal optically. There was no statistic difference in three‐dimensional reconstructive data with that obtained by anatomical measurements and thus can be used to directly instruct the clinic operation. These results demonstrate that a combined In‐Space technique with virtual endoscopy can accurately define the subtle structure and the related region of the optical canal. In conclusion, multislice helical CT‐based three‐dimensional reconstruction is of important value for clinical operations. Anat Rec, 2008. © 2008 Wiley‐Liss, Inc.     

Characterization of a novel HLA-DQB1 allele, DQB1*020102

A novel human leukocyte antigen (HLA)-DQB1 allele, DQB1*020102, was detected in a 28-year-old woman of Han ethnic in Guangzhou, China. Compared with HLA-DQB1*020101 and HLA-DQB1*0202, they differed in only one nucleotide at the position 167 (C to T) of exon 2, which was a highly conserved position. This is a synonymous mutation, which does not cause any change in the amino acid sequence of mature protein.     

Identification of a new HLA-B*56 variant, B*5614

In this report, the novel allele B*5614 is presented. The allele was identified in a Chinese individual by sequence-based typing. HLA-B*5614 differs from B*5608 by a single nucleotide at position 277G-->C in exon 2. This results in an amino acid change from Gly to Arg at codon 93.     

链脲佐菌素诱导的糖尿病早期小鼠胸主动脉钾通道变化

目的:探讨链脲佐菌素诱导的糖尿病早期小鼠胸主动脉钾通道的变化。方法:实验采用离体血管的方法测定糖尿病鼠和正常鼠胸主动脉环对血管收缩剂:60mmol/LKCl和苯肾上腺素(PE)、内皮非依赖性舒张剂:硝普钠(SNP)以及电压依赖性钾通道(K_V通道),钙激活型钾通道(K_Ca通道),ATP敏感钾通道(K_ATP通道)阻断剂的反应。结果:糖尿病鼠胸主动脉环对60mmol/LKCl、PE和SNP的效应都显著大于对照组;K_Ca通道阻断剂四乙铵(TEA)显著降低糖尿病小鼠胸主动脉环在PE的激动下SNP的舒张效应,而且其-logIC₅₀的差值较对照组显著增大;K_V通道阻断剂4-氨基吡啶(4-AP)显著降低糖尿病和正常小鼠胸主动脉环对SNP的舒张效应,但是-logIC₅₀差值无显著差异;K_ATP通道阻断剂格列苯脲(Glibenclamide)显著降低糖尿病小鼠胸主动脉环对SNP的舒张效应,而对照组无显著阻断作用,-logIC₅₀的差值也无显著差异。结论:糖尿病早期小鼠胸主动脉平滑肌细胞K_Ca通道的开放或表达显著增强,也证实了K_ATP通道开放增强。