Clinical significance and assessment of cytokines in various stages of ulcerative colitis

Summary In order to study the clinical significance and change of interleukin (IL)-1β and IL-10 concentration in intestinal mucosal tissues in various stage of ulcerative colitis (UC), IL-1β and IL10 levels were measured by enzyme linked immunosorbent assays (ELISA). Our results showed that IL-β level caused by spontaneous secretion in the intestinal mucous tissues in active stage of ulcerative colitis was significantly higher than that in normal controls and in remission stage of ulcerative colitis (P <0. 01,P<0. 001). IL-10 level in various stage of UC was relatively lower in controls, but there was no significantly difference between the two groups. Our study suggested that higher IL-1β level in active might play an important role in pathogenesis of UC, and IL-10, as an anti-inflammatory cytokine, was low in active UC, suggesting that it may be a important factor contributing to the development of higher IL-1β level. This project was supported by the grant of the Scientific Research Fund of the Ministry of Health (No. 98-2-387).     

Osteogenic potential of cultured bone marrow stromal cells transfected with transforming growth factor β1 genein vitro

Summary To study the osteogenic potential of cultured bone marrow stromal cells (BMSCs) transfected with transforming growth factor β₁ (TGF-β₁) genein vitro, cultured BMSCs were transfected with the complexes of pcDNA₃-TGF-β₁ and Lipofectamine Reagentin vitro. The cell proliferation was detected by MTT method and the morphological features of transfected BMSCs was observed. ALP stains and PNP method were used to measure ALP activity. In addition, the collagen type I propeptides and mineralized matrixes were examined by immunohistochemical staining and tetracycline fluorescence labeling respectively. The morphological and biological characters of the transfected BMSCs were similar to those of osteoblasts and the cell proliferation was promoted. The cell layer displayed strong positive reaction for ALP stains and immunohistochemical staining. ALP activity and collagen type I expression increased remarkably after transfection. Mineralized matrixes formed earlier and more in transfected BMSCs as compared with control group. It is concluded that transfecting with TGF-β₁ gene could promote the osteogenic potential of cultured BMSCs.     

Analysis of the factors influencing the therapeutic effects of onychomycosis

From July 1 994to June 1 999,5 4 5 onychomyco-sis patients were treated with Itraconazole and com-pleted their treatment courses with complete follow-up in out- patientdepartment.The recovery rate was83.1 4% and 79.2 3% in fingernail and toenail dis-eases respectively.But following phenomena werefound:( 1 ) Some new nails stopped growing in cer-tain length,even if the treatment continued;( 2 )Some damaged nails reappeared soon after the treat-ment ceased;( 3) Some damaged nails with deep- co…     

Determination of CD_(30) Expression on Peripheral Blood T Lymphocyte Subsets in Patients with Hemorrhagic Fever with Renal Syndrome by FCM

Hantavirus can cause panphilic infection in hu-man beings and proliferate especially in such impor-tantimmune organs and cells,as liver,spleen,bonemarrow,lymph nodes,thymus,lymphocyte and soon,thusresulting in immunity disturbance.CD30 is atransmembrane glycoprotein,belonging to the TNF/NGF receptor superfamily.In recent years,the bio-logical significance of CD30 elicited greatconcern.Theclose relationship between the expression of CD30antigen and theactivation and function of T cellssug-…     

Molecular Tissue Engineering: Applications for Modulation of Mesenchymal Stem Cells Proliferation by Transforming Growth Factor β_1 Gene Transfer 

It is well established that damaged articularcartilage has only a limited ability to healitself. Tissueengineering represents a new alternative approach tocartilage repairing. However,as it is very difficult toacquire seed cells with good activity,especially thoseinflammatory factors which induce the degradation ofarticular cartilage in the pathology of trauma orosteoarthritis were still exited,the success of all ofthese techniques has been variable and limited in thatnone were able to restore…     

Potent antioxidative potential of propofol during cardiopulmonary bypass in the adult

Summary The potent antioxidative potential of propofol during cardiopulmonary bypass (CPB) in adults was investigated. The selected 30 patients receiving open heart surgery under CPB were randomly divided into group A and group B. The patients in the group A and group B were given propofol (0. 1 mg. kg⁻¹, min⁻¹ and fentanyl (5 μg. kg⁻¹, min⁻¹) respectively to maintain anesthesia after aorta was cross-clamped. Blood samples were drawn pre-anesthesia, pre-CPB, at 30 min of CPB, at the end of CPB, at 1 h after CPB, at the end of operation, at 12 and 24 h postoperatively. RBC suspension was prepared and erythrocyte glucose-6-phosphate dehydrogenase (G-6-PD) and phosphofructokinase (PFK) activities, total erythrocyte reduced glutathione (GSH) and oxidized GSH (GSSG) were assayed and GSH/GSSG ratio was calculated. In the group A, G-6-PD and PFK activities and GSH/GSSG ratio were almost uneventfully during CPB and postoperatively. In the group B, G-6-PD activity was increased and PFK activity and GSH/GSSG ratio decreased significantly from 30 min of CPB until 12 h postoperatively. It was demonstrated that propofol could obviously attenuate free radical activity during CPB, while fentanyl has no effect on free radical reduction. Propofol could be beneficial as an anesthetic in patients presenting pathologies associated with free radical reactions during CPB. This project was supported partly by a grant from National Natural Sciences Foundation of China (No. 39270660).     

肝硬化患者幽门螺杆菌感染的差异性

观察肝硬变患者幽门螺杆菌感染的差异性及其对病情的影响.结果发现随着肝功能的减退,ChildA组,ChildB组,ChildC组HP的感染率逐步升高,CagA、VacA阳性率也逐步升高,ChildC与各组比较HP的感染率,CagA、VacA的阳性率均显著增高,差异有显著性(P<0.05),胃排空无差异(P>0.05).其余各组间比较无差异(P>0.05).提示肝硬变患者与对照组比较HP的感染率及其菌株无显著差异,胃的排空与HP的感染无关,肝脏功能状况与HP感染相关性有待进一步研究.     

鼻腔、鼻窦部砂粒性骨化纤维瘤6例临床分析

为探讨临床上比较罕见的砂粒性骨化纤维瘤（psammomatoid ossifying fibroma,POF）的临床特征、诊断与治疗方法,分析了6例POF的临床资料并综合文献,提出POF是一种以青少年为主、具有局部侵袭性的良性肿瘤,有明确的组织形态特征,临床症状特别是CT扫描是临床诊断的基础,治疗原则是在彻底清除病灶的基础上,兼顾面容与功能的保护。     

5-氟尿嘧啶白及微球家兔肾动脉栓塞后体内药代动力学研究

以常规5-氟尿嘧啶(5-Fu)注射液为对照品,研究了5-Fu白及微球家兔肾动脉栓塞后体内药代动力学过程.血药5-Fu浓度采用反相高效液相色谱法,所得血药浓度数据用3P87药代动力学程序处理.实验结果5-Fu白及微球体内过程符合二室模型,t1/2a(6.27±6.10)min,t1/2β(203.6±97.5)min,Cmax(4.8±1.9)μg/ml.t1/2a,t1/2β均比注射剂明显延长(P<0.01).表明微球剂型具有靶向制剂长效、高效、低毒的特点.     

苏拉明对黄病毒类NS3蛋白质合成的影响

寻找有效的抗黄病毒类药物,为临床应用提供理论依据.在病毒吸附培养细胞HepG2后加入不同浓度的苏拉明,48 h后采取培养上清液及感染细胞,运用病毒滴度测算(plaque法)、Western blot法及RT-PCR法,检测其对病毒增殖的影响.结果显示用苏拉明50 μg/m1处理后产生的病毒量是对照组的51.8%,同时显示病毒NS3蛋白质合成量减少,而对病毒RNA无任何影响.提示苏拉明抑制病毒复制作用主要是阻碍了病毒NS3蛋白质的合成.