2型糖尿病大鼠氧化应激介导肝脏和骨骼肌细胞内脂肪堆积的差异

目的观察2型糖尿病大鼠高脂饮食后肝脏和骨骼肌氧化应激及脂质堆积的差异。方法10只雄性Goto Kakisaki（GK）大鼠随机分为两组：糖尿病对照组和糖尿病硫辛酸治疗组（α-硫辛酸35mg／kg隔天腹腔内注射1次），健康Wistar大鼠4只为正常对照组，高脂饮食12周。测定各组大鼠肝、骨骼肌匀浆中的GSH、SOD和MDA及脂质谱水平，以及观察其组织病理形态学改变。结果糖尿病对照组肝组织GSH、SOD和MDA及脂质谱水平较正常对照组明显异常，经α-硫辛酸治疗后有明显改善，且GSH、SOD和MDA水平与甘油三酯水平相关；骨骼肌组织中除SOD外，GSH和MDA以及脂质谱水平在3组之间的变化，差异无统计学意义（P〉0．05）。糖尿病对照组有明显的肝细胞脂肪变性、坏死及炎性细胞浸润，硫辛酸治疗后有明显改善，而骨骼肌组织病理形态学无明显变化。结论12周高脂饮食可导致明显的氧化应激状态和细胞内脂肪堆积，但肝脏和骨骼肌两者之间存在一定差异，α-硫辛酸通过改善氧化应激状态而对细胞脂质代谢异常有明显的缓解作用。     

AO技术治疗Pilon骨折(附46例报告)

目的：评价AO技术治疗Pilon骨折的临床疗效。方法：自1995年7月～2002年6月应用AO技术对46例Pilon骨折行切开复位，支撑钢板及螺钉内固定治疗。术后随访0．5-7年，按Mazur标准进行功能评价。结果：46例患者总优良率84％，其中C1型20例，O2型15例，Q型4例。7例发生切口感染，8例出现创伤性踝关节炎。结论：临床治疗效果与骨折类型及治疗方法有关，运用AO技术治疗Pilon骨折可以取得满意的疗效。     

Novel SLA-DQ alleles and their recombinant molecules in xenogeneic stimulation of human T cells

MHC class II antigens DR and DQ are essential for graft rejection both in allo- and xeno-transplantation. The antigens, especially the DQA and DQB gene-coencoded DQ molecules, are also involved in transplantation tolerance induced by activation of regulatory T cells. Here we report six novel DQ alleles from three properly inbred Chinese pig strains Gz, Bm and Yn. In our study, cDNA of swine leukocyte antigen (SLA)-DQA and -DQB were amplified by RT-PCR and sequenced for each strain. The ORF-containing SLA-DQA and -DQB genes are composed of 768 (or 765) and 786 nucleotides, encoding antigen molecules of 255 (or 254) and 261 amino acid residues, respectively. Sequences of both SLA-DQA and -DQB alleles showed disparities when compared either among the three pig strains or with available SLA data, which allows our novel alleles receiving their accession numbers from GenBank. The sequence analysis further revealed a phylogenic connection of our SLA-DQ alleles with SLA-DQ(c) haplotype. In addition, the homologies of MHC DQ or DQ-like molecules between Chinese pigs (SLA) and human (HLA) are higher than those between pigs and mice (H-2). By co-transfection of Bm pig DQA and DQB genes into L929 cells, the Bm-DQ heterodimer-expressed cells could effectively stimulate the human lymphoproliferation in presence of human APCs with a mean stimulation index (SI) 9.9+/-1.4. This functional assay indicated that our recombinant DQ antigens are capable of initiating human lymphoproliferation in a xeno-MLR.     

论植入性医疗器械临床流通规范化全过程管理

如何对植入性医疗器械临床流通过程进行规范管理一直是困绕医院管理者的话题。我院通过开展全过程医疗质量实时监控,规范了植入性医疗器械从购销、使用、随访整个临床流通过程的管理,充分保障了患者用械安全。     

滋阴潜阳法治疗老年高血压病临床观察

目的观察滋阴潜阳法治疗阴虚阳亢型老年高血压病的疗效。方法将120例辨证为阴虚阳亢证的老年高血压病患者随机分为治疗组(中药加氨氯地平)60例与对照组(氨氯地平)60例,治疗8周;比较两组治疗前后临床症状、24h平均血压、血脂的变化和降压疗效。结果治疗组疗效优于对照组,在改善血脂方面亦优于对照组。结论滋阴潜阳法治疗阴虚阳亢型老年高血压病疗效确切。     

Clinical survey of neurosensory side-effects of mandibular parasymphyseal bone harvesting

The aim of the present survey was to assess neurosensory disturbances and/or tooth-pulp sensitivity losses after mandibular parasymphyseal bone-harvesting procedures. Twenty-eight harvesting areas in 16 patients were surveyed. Mucosal and skin sensitivity of the chin/lower lip, divided into four regions, were determined via Pointed-Blunt and Two-Point-Discrimination Tests. Pulp sensitivity of the mandibular teeth from the left second bicuspid to the right second bicuspid was tested by cold vitality preoperatively and 12 months postoperatively. Teeth were grouped according to sensitivity alterations and distance from the harvesting defects, as measured on CT scans, and statistically significant differences sought. At 12 months, 29% of preoperatively vital cuspids overlying the harvesting defects revealed pulp-sensitivity losses; no patient reported anaesthesia or analgesia; hypoaesthesia was present in 4% (8 sites; 2 patients), hypoalgesia was present in 3% (5 sites; 2 patients) and Two-Point-Discrimination Tests yielded pathologic responses in 5% of tested areas (10 sites; 4 patients). Teeth with and without pulp sensitivity changes were statistically indistinguishable regarding distances between root apices or mental foramen and the harvesting defect. The loss of pulp sensitivity in any tooth cannot be predicted simply on the basis of the distance between its apex and the harvesting osteotomy line.     

Decreased inflammation and augmented expression of trophic factors correlate with MOG-induced neuroprotection of the injured nigrostriatal system in the murine MPTP model of Parkinson's disease

The response of the immune system during injury of the central nervous system may play a role in protecting neurons. We have previously reported that immunization with MOG 35–55 prior to 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced injury of the dopaminergic system promotes less dopamine depletion and less dopaminergic damage of neurons in mice. In this study, we evaluate the influence of MOG immunization on the inflammatory reaction that occurs at the place of injury. C57Bl male mice, 2 and 12 months old, received i.p. injections of MPTP (40 mg/kg) and some groups animals also received an additional injection with myelin oligodendrocyte glycoprotein (MOG) 35–55 in CFA 6 days before MPTP administration. MPTP caused a common inflammatory reaction characterized by microglial activation, infiltration of T cells into the substantia nigra and striatum and increased expression of mRNA encoding pro-inflammatory cytokines (IL-1β, TNFα, INFγ) and trophic factors (TGFβ, GDNF). MOG immunization prior to MPTP administration significantly diminished the microglial reaction and reduced the levels of infiltrating CD8+ lymphocytes. The number of CD4+ T cells remained at the same level as in the MPTP group. Expression of pro-inflammatory cytokines was diminished. The mRNA expression of GDNF was significantly higher in the MOG pretreated mice relative to the MPTP group, both in the 2 month old and 12 month old groups. Since MOG immunization prior to MPTP intoxication appears to prevent nigrostriatal injury, the observed decrease of inflammation and increase of GDNF mRNA expression in the injured areas might represent one of the mechanisms of observed neuroprotection.     

Doxorubicin selectively suppresses mRNA expression and production of endothelin-1 in endothelial cells

Doxorubicin (DXR) is a widely used cytostatic agent, but its administration is limited by its cardiovascular side effects. The endothelium is one of the largest organs in the human body and due to its direct contact with blood; it is exposed to the toxic effects of DXR. The aim of this study was to investigate in endothelial cells the effects of DXR on the expression of genes involved in cardiovascular diseases. We used in vitro cultured human umbilical vein endothelial cells (HUVEC) as a model; gene expression was assessed by SuperArray and qPCR. Out of the 96 representative genes of cardiovascular importance, the expression of only the ET-1 gene changed significantly. ET-1 mRNA expression was 10.9% of the untreated control (p = 0.0049). This result was confirmed by qPCR (2.41% of control, p = 0.0022). DXR also suppressed ET-1 production at protein level (p = 0.0116).Both the early decrease in endothelial ET-1 production in the presence of DXR and the high plasma level of DXR during chemotherapy may influence the toxic effects of the drug.     

腮腺腺淋巴瘤MRI及临床分析

目的:探讨腮腺腺淋巴瘤的临床、MRI及病理表现的特点。方法:回顾性分析经手术及组织病理学证实的26例腮腺腺淋巴瘤患者的MRI影像学特征及其相关病理学改变。结果:26例患者年龄45～82岁,平均54.5岁。吸烟者23例(88.5%),男女比例5.5:1。双侧发病8例,占30.8%。共有病灶34个,其中位于腮腺后下极者31个(91.2%)。MRI检查结果31个(91.2%)病灶在T1WI为中等偏低信号,局部见更低信号;29个(85.3%)病灶在T2WI表现为高等混杂信号。所有病例增强扫描后均有不同程度不均匀强化,稍高于正常腮腺。结论:腮腺腺淋巴瘤好发于50岁以上的男性患者,与吸烟关系密切,多位于腮腺后下极,有双侧多发的特点,MRI检查更利于术前诊断。