碘杂环化合物对离体豚鼠心乳头肌动作电位和收缩力的作用

采用细胞内微电极记录技术,同步观察了3,6-[二甲氨基]-二苯并碘因甲酸盐(IHC-64)对豚鼠心乳头肌细胞动作电位和收缩力的作用。50μmol/L IHC-64抑制心肌收缩力,而不影响快反应动作电位。增加IHC-64浓度,动作电位0相最大峰值(APA)、除极速率(dp/dt_(max))和复极50％和90％时程(APD_(50)、APD_(90))被明显抑制。IHC-64抑制慢反应动作电位,提高细胞外钙浓度可拮抗这种抑制。结果提示,IHC-64主要抑制慢Ca~(2+)内流,同时也部分抑制快Na~+内流,它可能是一种新型B类钙通道阻滞剂。     

超声对胰腺移植术后的监测作用

目的探讨二维超声和彩色多普勒血流显像（cDFI）对移植胰腺的功能和术后并发症的监测作用。方法用彩色多普勒超声观察6例移植胰腺的形态和血流动力学变化情况。结果（1）功能正常的移植胰腺在术后形态正常，体积偏大，主胰管内径正常，实质回声较正常胰腺略高，动脉PSV13～64cm/s，R10.44～0.68，P10.67～2.33。（2）2例出现急性排异和1例出现移植胰腺炎的移植胰腺周边出现低或无回声区，实质回声明显减低，分布不均。1例急性重度排异的RI值超过0.9，而另1例急性轻度排异RI值小于0.7。1例移植胰腺炎RI值超过0.9，PI值超过4.0。结论CDFI作为一种无创的检查技术对胰腺移植术后的监测和诊治具有积极意义。     

出土文献与彭祖养生学术研究

彭祖是我国古代的"寿星",随着一系列的考古发现,如汉早期马王堆墓《十问》篇、张家山汉墓《引书》篇,尤其是上海博物馆藏竹简(三)有《彭祖》篇,改变了我们对彭祖学术的认识,不仅为证明楚国产生并流传黄老学派思想提供了佐证,而且在学术史领域提供了新的课题,进一步廓清了彭祖养生学术之源乃是古代巫术,其流是在春秋战国秦汉时期被诸子传诵,与道家等流派结合,具有神仙色彩,最终被汉末魏晋道家改造为神仙方术。     

Longitudinal Analysis of Severe Acute Respiratory Syndrome (SARS) Coronavirus-Specific Antibody in SARS Patients

The serum antibodies to severe acute respiratory syndrome (SARS) coronavirus of 18 SARS patients were checked at 1 month and every 3 months after disease onset. All of them except one, who missed blood sampling at 1 month, tested positive for the immunoglobulin G (IgG) antibody at 1 month. Fifteen out of 17 tested positive for the IgM antibody at 1 month. The serum IgM antibody of most patients became undetectable within 6 months after the onset of SARS. The IgG antibody of all 17 patients, whose serum was checked 1 year after disease onset, remained positive.     

Proteasome Inhibitors Sensitize Hepatocellular Carcinoma Cells to TRAIL

A poptosis, an evolutionarily conserved form of cell suicide, oc- curs in two physiological stages: commitment and execution.[1] It has been found that several Bcl-2 family proteins are located in the outer mitochondrial membrane, where they control relea…     

The role of endotoxin in the pathogenesis of experimental multiple system organ failure: a preliminary report.

In this study, an animal model of multiple system organ failure (MSOF) in rabbits, engendered by feeding E. coli prior to severe hemorrhagic shock, was used for the purpose of investigating 1) the relationship between lipopolysaccharide (LPS) and MSOF, and 2) the effectiveness of Re-LPS antiserum in preventing MSOF. The results showed that endotoxemia occurred very early, and its degree correlated well with that of organ dysfunction. Re-LPS antiserum administration abated the toxic effects and lowered the incidence of MSOF. These results suggest that sequential analysis of circulating LPS levels may be useful for the early diagnosis of MSOF, and that gut-derived endotoxin might play an important role in the pathogenesis of experimental MSOF.     

Role of intestinal bifidobacteria in the pathogenesis of gut-derived bacteria/endotoxin translocation and the effect of bifidobacterial supplement on gut barrier function following burns

Early multiple organ dysfunction syndrome appears to be facilitated with bacterial translocation in severely burn injury, yet the mechanisms of bacterial translocation remains in dispute. The aim of this study was to investigate the potential role of intestinal bifidobacteria in the pathogenesis of gut-derived bacteria/endotoxin translocation following burns and the effects of bifidobacterial supplement on gut barrier. Methods: Wistar rats were randomly divided into burn group (Burn, n=60),sham burn group (SB, n=10) in experiment Ⅰ , and burn + saline group (BS, n=30), burn + bifidobacteria group (BB, n=30), and sham-burn + saline group (SS, n= 10) in experiment Ⅱ. Animals in BB group were fed bifidobacterial preparation (5 × 109 CFU/ml) after burns, 1.5ml,twice daily. Animals in BS and SS were fed saline. Samples were taken on days 1, 3, and 5 in burn groups, and on day 3 in sham-burn groups. The incidence of bacteria/endotoxin translocation and counts of Bifidobacterium, Fungi and Escherichia coli in gut mucosa were determined with standard methods. The levels of sIgA in mucus of small intestine were measured by RIA. The positive sIgA expression in lamina propria and ileum mucosal injury was evaluated light microscopically by blinded examiners. Results: Our results showed that the incidence of bacterial translocation was increased after burns, which was accompanied by significant decrease in number of bifidobacteria but significant increase in E. coli and fungi in gut mucosa, and elevation of levels of plasma endotoxin and IL-6 (P<0. 001).The incidence of bacterial translocation was markedly reduced after 3- and 5-day supplementation of bifidobacteria compared with control group (P<0.05). The counts of mucosal bifidobacteria were increased by 4- to 40-fold,while E. coli and fungi were decreased by 2- to 30-fold and 10- to 150-fold, respectively, after bifidobacterial supplementation in contrast to control group. The damage of mucosa tended to be less pronounced after 3-day bifidobacteria-supplemented formula compared with control group [grade 2(0-6) vs. grade 4(3-6), P<0.05]. Moreover, the expression and release of sIgA was markedly augmented after 3-day bifidobacteria-supplementation formula and it returned to normal range on day 5. Conclusion: The decrease in counts and proportion of bifidobacteria in mucous membrane flora may play an important role in the development of bacteria/endotoxin translocation following thermal injury. The supplement of exogenous bifidobacteria could per se improve gut barriers, and attenuate bacteria/endotoxin translocation secondary to major burns.     

经皮椎板关节突螺钉固定的应用解剖及影像学研究

[目的]为经皮椎板关节突螺钉的器械设计及临床应用提供解剖学依据。[方法]利用30例干燥腰椎标本，用游标卡尺及量角器测量腰椎椎板上缘及下缘的厚度，椎板关节突螺钉的长度。通过影像学测量椎板的内倾角和下倾角。[结果]椎板的上缘薄而下缘厚。从L1～5椎板的厚度、螺钉的长度及从内倾角逐渐增加，而下倾角逐渐减小。[结论]上缘的厚度太薄不适合螺钉的放置。从L1～5使用4．5mm的皮质骨螺钉固定是安全的，但应该在椎板的下缘置人。注意下倾角和内倾角的变化。设计的瞄准器应该具有调节角度的装置。     

腰椎间盘突出症治疗方法与肌电图变化的相关性研究

腰椎间盘突出症(lumbar disc herniation，LDH)是导致腰腿痛的主要病因，本研究对具有典型临床症状、相应体征及MR或CT等影像学资料确诊的LDH，采用规范化非手术治疗，经规范化保守治疗无效者选用手术治疗，治疗前后均行肌电图(elec-tromyograptly，EMG)检查，旨在探讨肌电图变化与治