Molecular mechanisms underlying IFN-{gamma}-mediated tumor growth inhibition induced during tumor growth inhibition induced during tumor immunotherapy with rIL-12

The present studnt Investigates the molecular by which IFN-produced as a result of in vitroIL-12 addministration exertsits anty-tumor,rIL-12 was administered three or five times intomice bearing CDA1M fibrosarcoma, OV-HM ovarian carcinoma orMCH-1-A1 fibosarcoma. This regimen induced complete regressionof CSA1M and OV-HM tumors but only transient growth inhibitionof MCH-1-A1 tumors. The anty-tumor effects of Il-12 were associatatedwith enhanced induction of IFN-becouse these effects were abrogatedby pretreatment of hosts with anti-IFN- antibody.Exposure inin vitro of the three types of tumor cells to rIFN- resultedin moderate to potent inhibition of tumor cell growth.IFNstimulatedthe expression of mRNAs for an inducible type of NO synthasa(INOS)in CSA1M cells and indoleamine 2,3-dioxygenasa (IDO),an enzyme capable of degrading tryptophan, in OV-HM cells ,but induced only marginal levels of these mRNAs in MCH-I-ALcells. In association withiNOS gene expression, INF--stimulatedCSA1M cells produced a large amount of NO which functioned toinhibit their own growth in vitro. Although OV-HM and MCH-1-A1cells did not produce NO, they also exhibited NO susceptibility.Whereasthe tumor masses from IL-12-treated CSA1M-bearing mice inducedhigher levels of INOS (for CSA1M) or IDO and iNOS (for OV-HM)mRNAs,the MCH-1-A1 tumor mass expressed lower levels of iNOS mRNAalone.Moreover, massive infiltration of CD4⁺and CD8⁺ T cellsand Mac-1⁺ cells was seen only in the CSA1M and OV-HM tumors.Thus, these results indicate that IFN- produced after IL-12treatment induces the expression of various genes with potentialto modulate tumor cells and growth by acting directly on tumorecells or stimulating tumor-infiltrating lymphold cells and thatthe effectiveness of IL12 therapy is assoiated with the operation if these mechanisms.     

原发性肺癌患者的血液流变学研究

观察了原发性肺癌患者血液流变学的变化,采用血液比粘度计检测正常组(42例),肺癌组(58例),慢性阻塞性肺病(COPD)组(76例)患者的血沉降率、血球压积、全血比粘度、血浆比粘度及全血还原比粘度。结果:1 COPD组血球压积、低及中切变率时全血比粘度较正常组、肺癌组显著升高(P<0.05).2 肺癌组血沉降率较正常组、COPD组显著升高(P<0.05).3 肺癌组的血球压积、低及中切变率时的全血比粘度较正常组无显著性差异(P>0.05).4 3组高切变率时全血比粘度、全血还原比粘度与血浆比粘度无显著性差异(P>0.05).5正常组与COPD组血沉降率无显著性差异(P>0.05)。结论:肺癌患者血沉降率增高提示其红细胞聚集力增强,而其血粘度无明显改变,可能与红细胞压积无明显改变有关。COPD患者血球压积、血粘度明显增高,可能与长期缺氧有关。     

雌性大鼠下丘脑5-羟色胺1A和2A受体亚型的定位分布

本研究应用免疫细胞化学技术观察了雌性成年SD大鼠下丘脑内5-HT1A受体亚型(5-HT1AR)和5-HT2AR免疫阳性结构的分布。结果显示:5-HT1AR免疫阳性神经元在视前区大细胞核、视前室周核、视上核和下丘脑外侧前核等核团内密集分布。在内侧视前核、外侧视前区、下丘脑室周核、下丘脑外侧区、背内侧核、腹内侧核、结节核、结节乳头体核、乳头体内侧核和乳头体外侧核等结构内也有较多的分布;而在正中视前核、视交叉上核、下丘脑室旁核、下丘脑背侧核、弓状核、乳头体上核和乳头体前核等部位有散在的分布。与5-HT1AR不同,5-HT2AR免疫阳性反应产物主要见于纤维和终末,阳性胞体少且染色淡。5-HT2AR阳性胞体见于下丘脑室旁核、视上核、腹内侧核、结节核、视前内侧区、外侧区、外侧前核、下丘脑背内侧核等处。另外,在视前区前内侧视前核、视交叉上核背侧和外侧可见围绕血管分布、密集成团簇状、带有大小不同膨体的阳性神经纤维缠结。本文结果提示5-HT1AR阳性结构广泛地分布于大鼠下丘脑,而5-HT2AR在下丘脑分布较为局限。二者不同的分布特点,提示它们可能介导5-HT在下丘脑的不同生理功能。     

Effect of recombinant interleukin-4 on immunoglobulin synthesis in a culture of mononuclear cells isolated from human peripheral blood

The effect of recombinant interleukin-4 on the synthesis of immunoglobulins is studied in a culture of mononuclear cells isolated from peripheral blood of healthy donors and patients with hay fever. It is shown that interleukin-4 stimulates production of IgE in cells of healthy donors, but not of hay fever patients, and does not affect the synthesis of other isotypes in either group. At the same time, increased cell proliferation under the influence of interleukin-4 was observed in cultured cells of both healthy donors and patients. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 118, N ^o 10, pp. 426–428, October, 1994 Institute of Pulmonology, Ministry of Health, Moscow. (Presented by D. S. Sarkisov, Member of the Russian Academy of Medical Sciences)     

Effect of pulsed hydrodynamic influences on blood cells in vitro and in vivo

(Presented by Academician of the Academy of Medical Sciences of the USSR A. N. Klimov.) Translated from Byulleten' Éksperimental'noi i Biologii i Meditsiny, Vol. 110, No. 12, pp. 604–606, December, 1990.     

中枢神经系统感染患者血清NSE和sICAM-1的改变

目的 :探讨中枢神经系统感染患者血清中NSE和sICAM 1水平的改变。方法 :采用ELISA法检测了 30例CNS感染的患者和 2 0例正常健康人血清中的NSE和sICAM 1水平。结果 :在CNS感染患者血清中NSE( 12 5 .6 8± 14 .38μg/L)和sICAM 1( 4 48.94± 96 .70μg/L)显著高于正常对照组的NSE( 6 .6 6± 1.2 5 μg/L)和sICAM 1( 2 91.78± 39.18μg/L) ,P <0 .0 1。在CNS感染各组中病毒性脑炎患者的NSE亦显著高于其他各组 ;sICAM 1在CNS感染各组间无显著性差异 ,P >0 .0 5。结论 :提示NSE和ICAM 1可作为CNS损害和感染的监测指标     

大鼠脑干神经元型一氧化氮合酶免疫阳性神经元的分布

目的　观察大鼠脑干神经元型一氧化氮合酶 (nNOS)免疫阳性神经元的分布 ,为探讨nNOS的作用提供形态学资料。方法　用ABC免疫细胞化学方法显示脑干nNOS免疫阳性神经元。结果　大鼠脑干nNOS免疫阳性神经元以中脑和脑桥分布丰富 ,延髓较稀少 ;在中脑 ,nNOS免疫阳性神经元主要分布于中脑水管周围灰质的背侧部、被盖背外侧核、中缝背核、上下丘灰质等部位 ;在脑桥 ,主要分布于被盖背外侧核、脑桥中缝核、被盖脚桥核、蓝斑、臂旁核、斜方体核 ,以及脑桥网状结构 ;与中脑和脑桥相比 ,延髓nNOS免疫阳性神经元较少 ,主要分布于延髓网状结构、三叉神经脊束核和孤束核等核团。结论　分布于脑干内丰富的nNOS免疫阳性神经元可能通过其生成的NO调节其他神经递质的分泌 ,共同参与内脏活动、感觉和运动的传导 ,以及睡眠和觉醒等脑的高级整合功能的调节。     

HSP70对大鼠肝脏局部缺血再灌注后炎症反应的影响

目的：通过热应激预处理诱导HSP70表达，探讨其对肝脏缺血再灌注损伤后炎症反应的影响。方法:采用大鼠局部缺血再灌注模型（IR组），并在热应激预处理（H+IR组）及槲皮素＋热应激预处理（Q+H+IR组）条件下观察肝脏缺血再灌注后HSP70、ICAM-1的表达及MPO的活性；测定血清ALT和AST的活性；电镜观察肝细胞结构的改变。结果:在H+IR组检测的各时点HSP70表达均明显高于其它两组、对肝脏进行缺血再灌注后，肝细胞损伤较轻，血清ALT、AST升高不明显(P<0.01)；肝组织中ICAM-1表达增加，以再灌注后6 h最显著，MPO活性升高以12 h最为显著，但两者变化均低于IR组和Q+H+IR组(P<0.01)。结论：〖HTSS〗热应激预处理诱导产生HSP70蛋白能够降低大鼠肝脏缺血再灌注损伤过程ICAM-1的表达和MPO活性的改变，进而抑制炎症反应引起的肝脏损伤。     

绞股蓝总皂甙对正常人及麻醉犬缺氧性肺血管收缩反应的影响

本文研究绞股蓝总皂甙对血流动力学及缺氧性肺血管收缩反应的影响。１４名男性志愿者口服２０日后，基础血流动力学指标无显著变化，但ＨＰＶ显著降低。服药后血小板活化程度，血浆血管紧张素Ⅰ、Ⅱ含量都明显降低。