Immunophenotypic and Functional Characteristics of Haemopoietic Cells from Human Cord Blood

Cord blood (CB) as a new source for bone marrow transplantation represents advantageous features concerning stem cell and leucocyte compartments and function. We attempted to get more information about the phenotypes and function of CB cells by investigating their cell surface markers and also the production of IL-2, IFN-γ and IL-6 by mitogen and alloantigen stimulation. The CB cells were characterized by a low proportion of CD3⁺ T cells, CD4⁺ T subpopulation, activated T cells and CD3⁺ CD16/CD56⁺ cytotoxic cells, suggesting reduced graft versus host potential. The significant increase of CD19/CD3 double positive cells and decrease of CD19/HLA-DR double positive mature B cells reflect that immature B cells exist in CB. In the functional studies, a 27- and 5-fold reduction was observed in the production of IFN-γ by CB cells stimulated with PHA and allogeneic cells, respectively. The production of IL-2 in PHA-stimulated CB cells also showed a 50% determination. Decrease in the production of these cytokines by CB cells is supported by the decline of the proportion of CD3⁺ T cells. However, an increase was observed in the production of IL-6 by CB cells stimulated with allogeneic cells as compared with the controls. These results suggest a difference in the functional activity of the T helper cell subsets between the CB and peripheral blood and/or differences in the functional maturity of T helper cell subsets and B cells in these compartments.     

新型吸入麻醉剂七氟烷综述

七氟烷作为一种吸入麻醉剂已广泛用于临床。通过国内外研究综述，结合目前的合成研究、药理学进展、现有生产能力、产销状况，说明七氟烷是一种非常优良的新型吸入麻醉剂。     

腔镜与传统甲状腺手术对机体创伤的比较

目的 探讨胸乳路径腔镜甲状腺手术对机体的创伤性。方法 将2009年1月至2010年12月收治的60例甲状腺良性肿瘤依据患者意愿分成腔镜手术组(A组=32例)及传统手术组(B组=28例),分别比较术后2h、1d和3d3个时点外周血白细胞介素-2( IL)-2、IL-6、C-反应蛋白(CRP)和肿瘤坏死因子-α(TNF-α)检测值。结果 腔镜组术后3个对应时点血清IL-2值[(12.6±2.1)、(11.8±1.9)、(11.8±3.0) ng/L]、CRP值[(1.6±0.7)、(2.4±0.9)、(2.5±0.9) mg/L]、TNF-α值[(53.2±6.8)、(49.1±5.5)、(46.5±5.0) ng/L]与传统组术后相对应3个时点血清IL-2值[(10.6±1.1)、(11.2±2.6)、(12.0±3.2) ng/L]、CRP值[(0.8±0.6)、(2.4±0.5)、(2.4±0.7) mg/L]、TNF-α值[(48.5±7.1)、(51.3±6.2)、(41.5±13.7)ng/L]组间差异无统计学意义(P值均＞0.05);腔镜组术后3个对应时点血清IL-6值[(4.8±2.4)、(4.3±2.1)、(5.4±5.6)ng/L]与传统手术组术后相对应时段血清IL-6值[(6.4±2.4)、(7.1±4.1)、(4.9±0.8)ng/L]组间术后2h、1d差异有统计学意义(P＜0.05)。结论 腔镜甲状腺手术对机体的创伤与传统甲状腺手术比较属相对微创,在不给机体带来更大创伤同时,可获得美容效果,是一种值得推广的术式。     

早期氧气面罩雾化给氧对纠正重型颅脑损伤患者低氧血症的影响效果观察

目的 探讨氧气面罩雾化给氧方式对重型颅脑损伤患者低氧血症的可行性及安全性,以促进患者早日康复.方法 将收治98例重型颅脑损伤患者随机分为观察组48例和对照组50例,在常规治疗的同时,观察组采用氧气面罩接雾化器给氧方式进行给氧;对照组采用鼻塞导管湿纱布覆盖口鼻进行给氧.结果 观察组其动脉血氧饱和度、氧分压明显提高.2组病死率比较差异明显,而2组患者的心率、血压、pH、PaCO2比较差异不明显.结论 氧气面罩雾化器给氧能快速、有效纠正重型颅脑损伤患者缺氧状态,纠正低氧血症.     

雷公藤甲素对体外不同密度嗜酸细胞凋亡及GM-CSF受体αmRNA表达的影响

目的观察雷公藤甲素(Triptolide,TP)对哮喘豚鼠体外不同密度嗜酸细胞(Eos)凋亡及粒细胞-巨噬细胞克隆剌激因子受体α(GM-CSFRα)mRNA表达的影响,探讨TP促Eos凋亡的机制。方法卵蛋白激发哮喘豚鼠48h后,行支气管肺泡灌洗,分离低密度Eos(HEos)及正常密度Eos(NEos)。HEos及NEos分别与TP(10-7～10-4mol/L)共培养24h,以原位杂交检测Eos表达GM-CSFRαmRNA,3′末端脱氧核苷转移酶介导的脱氧三磷酸尿苷(d-UTP)缺口末端标记(TUNEL)法检测细胞凋亡。结果哮喘豚鼠不同密度Eos经TP干预24h后,细胞凋亡增加,与对照相比HEos在10-7mol/L时出现差异(P<0.05),NEos在10-6mol/L时出现差异(P<0.05),同时不同密度EosGM-CSFRαmRNA表达增加,与对照相比均在10-5mol/L时出现差异(P<0.05)。Eos凋亡与TP浓度呈剂量依赖性。HEos与NEos表达GM-CSFRα无差异(P>0.05)。不同密度Eos表达GM-CSFRα与Eos凋亡呈正相关(P<0.05)。结论TP可促进哮喘豚鼠不同密度Eos...     

人白细胞介素4剪接变异体的克隆及其在大肠杆菌中的表达

目的:获取一株重组人白细胞介素4选择性剪接变异体(IL-482)蛋白的高效表达菌株,为研究变态反应性疾病的发病机制以及阻滞IL-4的生物学效应奠定基础。方法:分离人外周血琳巴细胞,提取mRNA,RT- PCR获得人IL-482基因后,克隆入大肠杆菌表达载体,构建高效表达人IL-482的重组菌株。结果:成功构建了人IL-482的高效表达菌株(TNFHis-hIL-482),序列测定与文献报道一致。SDS-PAGE分析显示此菌株所表达的目的蛋白产物的相对分子质量为3．4×104,与预期结果相符。光密度扫描重组hIL-482蛋白质占细菌总蛋白的30％。结论:在大肠杆菌中成功地表达了hIL-482基因。     

克山病病区玉米及酱块对大鼠心肌损伤的实验研究

Objective To investigate the myocardial damage in rats fed with corn from Keshan disease area added with bean puree. Methods Male Wistar rats were randomly divided into 3 groups according to their body weights, and fed with corn, corn from Keshan disease area added with bean puree, corn from non-endemic area. The GSH-Px activity of vena cardalis blood was examined in 1 and 3 months, rats were sacrificed after being fed for 6 months to examine the heart changes with HE stain. Results The three groups of GSH-Px activity were different in 1 and 3 months respectively(F=23.60,72.46, all P<0.01); GSH-Px activity was (181.58±22.15), (44.76±28.59)U/L in rats fed with corn, was (195.03±17.66), (30.38±3.35)U/L in those fed with corn added with bean puree from Keshan disease area, lower than the group fed with corn of non-endemic area[(340.90±95.42), (125.17±13.64)U/L, all P < 0.01]. But the difference of GSH-Px activity between simple corn group and corn adding bean puree groups of Keshan disease area was not obvious(P>0.05). Myocardial damage incidence of the three groups was 3/9,1/9,2/7. Difference among three groups did not have statistical significance(χ2=1.33, P> 0.05). Conclusions Only corn from Keshan disease area may induce myocardial damage pathology change. Adding bean puree into corn does not increase damage.     

没食子提取物诱导乳腺癌细胞凋亡的实验研究

目的：观察没食子提取物（MSZ）是否具有诱导癌细胞凋亡的作用。方法：人乳腺癌细胞Bcap-37经不同浓度MSZ作用24-48h后,经倒置显微镜观察细胞形态的变化,流式细胞仪检测细胞凋亡周期及凋亡率。结果：在倒置显微镜下,可见大量具有凋亡特征的细胞;流式细胞仪检测出现明显的凋亡峰,呈剂量依赖性。结论：MSZ具有抑制乳腺癌细胞Bcap-37生长,诱导其凋亡的作用。     

核心蛋白聚糖在移植肝慢性排斥反应中的表达及意义

Objective To investigate expression and significance of decorin(DCN)in liver tissue and serum of liver transplant patients with chronic rejection(CR).Methods Immunohistochemistry(SP method)was used to detect expression of DCN in liver tissue of 16 normal controls, 20 patients with cirrhosis, 46 liver translantion patients without CR and 8 patients with CR.Enzyme-linked immunosorbent assay method(ELISA method)was used to determined the content of DCN in serum of all research subjects.Results The expression of DCN was negative in normal hepatic tissues and with/without CR, cirrhosis tissues showed strong expression of DCN.The positive expression rate and the average optical density value of DCN in liver transplant tissues with CR had significant difference comparing with Cirrhosis tissues(25% vs 55%, 0.1249 ±0.0039 vs 0.2357 ±0.0396, P <0.01,while no statistic siqnificance compared to normal liver tissues and those without CR.The level of DCN in serum was significantly higher in liver transplant patients with CR, with significant difference comparing with normal people, liver cirrhosis and transplant liver patients without CR(54.0833 ± 6.0325)μg/L vs(1.0232 ± 0.9105)μg/L,(12.6202 ± 1.5370)μg/L,(17.7102 ± 2.3562)μg/L, P < 0.01).The concentration of DCN in serum showed a positive correlation with the degree of CR.Conclusions DCN showed negative expression in liver tissue and increased significantly in serum of liver transplantation patients with CR.This suggests that DCN may be involved in occurrence and development of CR.At the same time the determination of DCN in serum maybe become an important indicator of the early diagnosis, development and prognosis of CR for liver transplant patients.