雪莲对小鼠腹腔巨噬细胞Fc和C_(3b)受体及红细胞免疫粘附功能的影响

检测巨噬细胞膜F_c和C_(3b)受体的活性及红细胞免疫粘附功能是选一步研究补益药增强机体免疫功能的重要手段。为探讨雪莲增强免疫作用的机制,本实验采用EA、YC花环形成以及红细胞C(3b)受体花环和免疫复合物花环形成等方法分别检测了雪莲和雪莲多糖对脾虚模型和氢化可的松琥珀酸钠(HCSS)抑制的小鼠腹腔巨噬细胞F_c和C_(3b)受体及红细胞免疫粘附功能的影响以及对胰酶损伤的小鼠腹腔巨噬细胞F_c和C_(3b)受体的修复作用。结果表明雪莲和雪莲多糖能提高脾虚模型和HCSS抑制的小鼠腹腔巨噬细胞EA和YC花环形成率及红细胞C_(3b)受体花环形成率和免疫复合物花环形成率,但二者在体外作用一小时,对胰酶损伤的小鼠腹腔巨噬细胞EA和YC花环形成率无显著影响,说明雪莲和雪莲多糖能增强脾虚模型和HCSS抑制的小鼠腹腔巨噬细胞膜F_c和C_(3b)受体及红细胞免疫粘附功能,对胰酶损伤的小鼠腹腔巨噬细胞F_c和C_(3b)受体,则无明显的修复作用。     

氯化钾对高温条件下肉仔鸡钾、钠代谢的影响

选28日龄艾维菌(AVIAV)肉仔鸡120只,随机分为4组,1组饮自来水(对照组),2、3、4组分别饮添加0.18%、0.26%、0.34%氯化钾(KCl)的水(试验组).舍温控制在34±1℃,试验期四周,测定KCl对高温条件下肉仔鸡钾、钠代谢的影响.结果表明:饮水中添加KCl,肉仔鸡血清K+浓度高于对照组,但差异不显著,血清Na+前两周3、4组显著低于1组,以后趋于一致;K+的排泄量随食入量的增加而增高,Na+的排泄量后三周3、4组高于对照组;K+、Na+存留量各组间无显著差异.     

猪红细胞免疫功能初步研究

本实验通过对35例猪红细胞 C_3b 受体花环和免疫复合物花环的检测,证明猪红细胞亦有C_3b 受体(即 Complement receptortype I,CR_1),表明猪红细胞不但具有传统医学观念上的功能,而且还可借助 CR_1进行免疫粘附,并以此为基础,表现出各种重要的免疫功能。     

应用流式细胞仪检测斑点叉尾鮰红细胞免疫粘附功能

制备荧光标记的致敏酵母及未致敏酵母,应用流式细胞仪检测斑点叉尾鮰全血体系与洗涤红细胞体系下红细胞C3b受体(erythrocyte C3breceptors,E-C3bR)与红细胞免疫复合物(erythrocyte immune complexes,E-IC)花环率,同时检测未灭活血清与灭活血清(58℃处理30min)对洗涤红细胞免疫粘附功能的调控作用.结果显示,斑点叉尾鮰红细胞能有效粘附致敏酵母及未致敏酵母,其灭活血清组E-C3bR与E-IC花环率(分别为16.78%和13.51%)明显高于未灭活血清组(分别为5.99%和6.99%)与生理盐水组(分别为8.59%和8.30%);未灭活血清组E-C3bR与E-IC花环率明显低于生理盐水组.试验结果表明斑点叉尾鮰红细胞具有免疫粘附功能,并且血清中存在促进红细胞免疫粘附功能的热稳定因子及抑制其免疫粘附功能的热不稳定因子.该试验不仅从技术上促进了红细胞免疫功能的研究,而且有助于全面客观地了解鱼类的红细胞免疫功能,为鱼类的病害监测及其防治奠定基础.     

发酵棉粕对黄羽肉鸡生产性能和屠宰性能的影响

为了研究添加不同比例发酵棉粕对黄羽肉鸡生产性能及其屠宰性能的影响,选用14日龄健康黄羽肉鸡320只,随机分成4组,每组4个重复,每个重复20只鸡,Ⅰ组为空白对照组,Ⅱ、Ⅲ、Ⅳ组分别添加3%、6%和9%发酵棉粕,研究不同添加量对肉仔鸡生长前期(14-28日龄)、中期(29-45日龄)、后期(46-65日龄)各阶段生产性能和屠宰性能的影响。结果表明:①较Ⅰ组而言,肉仔鸡生长前期平均日增重Ⅱ组提高2.50%(P>0.05),Ⅲ组极显著提高7.22%(P<0.01),Ⅳ组则极显著下降15.03%(P<0.01);生长前期采食量Ⅱ、Ⅲ组显著提高1.47%和1.73%,Ⅳ组则极显著下降7.66%(P<0.01);前期料重比Ⅱ组下降0.97%(P>0.05),Ⅲ组极显著下降5.34%(P<0.01),Ⅳ组则极显著提高8.74%(P<0.01);肉仔鸡生长中、后期以及全期平均日增重、采食量、料重比Ⅱ、Ⅲ组有所提高,Ⅳ组则下降,但均差异不显著(P>0.05)。②较Ⅰ组而言,半净膛率Ⅱ、Ⅲ组极显著提高2.73%、3.60%(P<0.01);胸肌率Ⅱ、Ⅲ组极显著提高14.83%、16.68%(P<0.01);腿肌率Ⅲ组提高最为明显,为14.17%(P<0.01);屠宰率、全净膛率各试验组均差异不显著(P>0.05)。由此可见添加6%发酵棉粕组在日增重、采食量、料重比、屠宰率、胸肌率和腿肌率都优于3%、9%发酵棉粕组,以添加6%发酵棉粕为宜。     

红细胞免疫功能研究进展

1981年,Siegel等人首次提出“红细胞免疫系统”的概念,并从红细胞免疫粘附以及与之有关的循环复合物(CIC)清除、促进吞噬细胞吞噬功能、效应细胞样作用等方面论述了红细胞的免疫功能。而且设计出了检测红细胞免疫粘附受体活性的“标准的红细胞免疫粘附试验”。此后,国外学者从各方面展开了深入研究。在国内,郭峰在siegel标准试验的基础上,于1982年建立了红细胞C_3b受体花环试验和红细胞免疫复合物花环试验,分别测定红细胞C_3b受体活性和红细胞膜上吸附免疫复合物的情况。在此基础上,国内学     

绵羊自然感染附红细胞体对绵羊红细胞的影响

选择1岁左右自然感染附红细胞体的杂交育肥绵羊为试验动物,采血,观察红细胞的形态,并测定RBC、Hb、PCV、红细胞脆性（最小脆性和最大脆性）、红细胞ATPase和SOD活性、红细胞C3b受体（E-C3bRR）花环率和红细胞免疫复合物（E-ICR）花环率.检测结果显示：与对照组相比,急性感染组绵羊红细胞脆性、RBC、Hb、PCV、红细胞ATPase和SOD活性及E-C3bRR率和E-ICR率呈降低趋势;但隐性感染组所测定指标变化不明显.表明附红细胞体侵袭红细胞后,感染越强,红细胞就易破裂而溶血、红细胞内外阳离子平衡失调、红细胞抗氧化能力降低,同时,破坏了红细胞膜表面的C3b受体,红细胞膜表面游离状态的C3b受体数量明显减少,机体红细胞的免疫黏附活性降低,红细胞免疫功能低下.     

大鼠脾不统血证模型免疫器官—免疫细胞的变化

Wister大鼠灌胃酒醋及阿斯匹林,造成脾不统血征(上消化道出血)动物模型。结果:模型组动物中枢免疫器官胸腺皮质的淋巴细胞减少,髓质PAS阳性物质减少;周围免疫器官脾脏T细胞区和B细胞区缩小。免疫细胞白细胞、红细胞、血小板减少,RBc-c_3b受体花环率、RBc-IC花环率降低,与对照组动物比较有显著性差异。经归脾丸及其加味反证治疗,病变得以恢复。提示脾化生之气血为免疫的物质基础。     

不同放牧强度草地线叶嵩草成穗结实的初步研究

对高寒草甸类不同牧地线叶蒿草成穗结实进行定点观测与分析.结果表明:①在围栏禁牧地、适度放牧地和过度放牧地,线叶嵩草的成穗率和每穗粒数分别为14.23％(±6.68)、21.67,6.69％(±2.6)、16.23和0.57％(±0.34)、13.68,差异极显著(P<0.01);②不同放牧强度草地线叶嵩草的枝条密度差异不显著(P>0.05);③围栏禁牧地和适度放牧地的成穗率与其密度呈显著正相关,过度放牧地相关不显著(r=0.5497,P>0.05).     

烯萜醇对大鼠胃腺癌的作用

目的观察烯萜醇对大鼠胃腺癌的治疗作用.方法经饮水摄入N-甲基-N'-亚硝基-N-亚硝基胍(MN-NG,150mg/L)诱发大鼠胃腺癌,同时食烯萜醇添加食进行治疗.结果食烯萜醇添加食20 g/Kg,10g/kg,32周大鼠胃腺发生原位癌、浸润癌,胃癌发生率分别为11.5%,22.6%,平均癌巢数分别为0.12±0.58,0.8±0.75,与对照组比较具有显著差异(P＜0.01或P＜0.05),且与给药剂量密切相关.结论烯萜醇具有抑制大鼠胃腺癌的作用.     

Effect of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children

Objective: To investigate the influence of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children. Materials and methods: A group of 217 children three to six years of age from a rural area were given a thorough physical examination and the concentration of lead in blood samples taken from each subject was determined. The indices of lymphocyte immunity (CD^ 3CD^ 4, CD^ 3CD^ 8, CD^ 4CD^ 8, CDˉ3CD^ 19) and erythrocyte immunity (RBC-C3b, RBC-IC, RFER, RFIR, CD35 and its average fluorescence intensity) of 40 children with blood lead levels above 0.483 μmol/L were measured and compared with a control group. Results: The blood lead levels of the 217 children ranged from 0.11 μmol/L to 2.11 μmol/L. The CD^ 3CD^ 4and CD^ 4CD^ 8 cells were lower (P＜0.01) and the CD^ 3CD^ 8 cells were higher in the lead-poisoned subjects than those in the control group (P＜0.05). CD^ 3 and CDˉ3CD^ 19 did not show significant differences. Although the RBC-C3b rosette forming rate was lower and the RBC-IC rosette forming rate was higher in the lead-poisoned group, this difference could not be shown to be statistically significant (P＞0.05). RFIR was found to be lower in the lead-poisoned group (P＜0.01). Compared with the control group, the positive rate of CD35 was not found to be significantly different in a group of 25 lead-poisoned children (P＞0.05), while the average fluorescence intensity was lower in the lead-poisoned group (P＜0.05). Conclusion: Lead exposure can result in impaired immune function oft lymphocytes and erythrocytes in preschool children.     

中药止血散的止血作用初探

本实验选用ＮＩＨ小鼠，随机分成Ⅰ、Ⅱ、Ⅲ三组，用环磷酰胺建立小白鼠再生障碍性贫血动物模型．实验结果显示：出血时间Ⅰ（对照）组（１．５８±０．１５）ｍｉｎ，Ⅱ（环磷酰胺）组（５．２３±０．２７）ｍｉｎ，Ⅲ（环磷酰胺＋止血散）组（１．５７±０．１）ｍｉｎ；统计学处理表明Ⅱ与Ⅰ组间有差异（ｐ＜０．０５），Ⅱ与Ⅲ组间有差异（ｐ＜０．０５），Ⅰ与Ⅲ组间无差异（ｐ＞０．０５）；血块回缩分别为完全、不良、完全，血小板计数分别为４３０．２±３４．３６×１０￣９Ｌ￣（－１），２８４±１９．９６×１０￣９Ｌ￣（－１），４６５．４±２２．４８×１０￣９Ｌ￣（－１）．统计处理表明Ⅱ与Ⅰ组间和Ⅱ与Ⅲ组间存在显著性差异（ｐ＜０．０１），Ⅰ与Ⅲ组间无差异，本实验提示：中药制剂止血散能促进血小板的生成和血小板的释放，具有止血作用．     

Osseointegration of hollow porous titanium prostheses loaded with cancellous bone matrix in rabbits

This study aimed to observe the osseointegration of hollow porous titanium prostheses (HPTP) loaded with cancellous bone matrix (CBM) in rabbits using histological and biomechanical perspectives.Experimental samples were implanted into the lateral femoral condyles of 66 New Zealand rabbits,allocated into the following groups:non-porous prosthesis group (Group A,n=22);HPTP group (Group B,n=22);HPTP+CBM group (Group C,n=22).The rabbits were sacrificed at 3,8 and 12 weeks,postoperatively.X-ray analyses,microscopy techniques and morphological measurement software and mechanical tests were used for evaluation.At each time point,the tissues surrounding the implants were similar in all of the groups,with bony in-growth into the 2-mm round holes observed for the defects in Groups B and C.However,the internal bone formation was significantly better in Group C than in Group B at different time points (P<0.01).Biomechanically,the pull-out forces were significantly greater in Groups B and C than in Group A (P<0.01),with no difference between Groups B and C (P>0.05).These results suggest that bone can grow into the cavities of HPTP to achieve more stable locking fixation,and those osteogenic materials,such as CBM,can enhance osteogenesis to achieve better osseointegration between the implant and the host bone.     

中西医结合治疗126例功能性消化不良的临床观察

目的:观察中西医结合治疗126例功能性消化不良(FD)的疗效.方法:将126例FD患者随机分为中药组(A)、西药组(B)和中西药组(C),分别给予中药复方,吗丁啉和中西药联合治疗,疗程4周.观察治疗前后症状积分的变化并计算胃内残存率的变化.结果:中药组总有效率为68.1%,西药组为65%,疗效无显著性差异(P＞0.05),中西药组为85.7%,疗效高于另外两组(P＜0.05),中西医组15 min、30 min和60 min胃残余率明显低于中药组和西药组,有显著性差异(P＜0.01,P＜0.05).结论:中药复方和吗丁啉是治疗FD较有效的药物,中西药联合应用可提高治疗FD的效果.     

Ge-132对荷瘤小鼠NK细胞活性及红细胞免疫功能的影响

为探讨Ｇｅ－１３２抗癌作用机制,进行了Ｇｅ－１３２对荷瘤小鼠脾脏ＮＫ细胞活性和红细胞免疫粘附功能影响的体内实验研究,结果表明,Ｇｅ－１３２对小鼠移植瘤（Ｓ１８０）的生长具有显著的抑制效应,抑制率达５５％,荷瘤小鼠脾脏ＮＫ细胞活性明显低于正常对照组,Ｇｅ－１３２能使其恢复;荷瘤小鼠ＲＢＣ－Ｃ３ｂ受体花环率和肿瘤ＲＢＣ花环率明显低于正常对照组（Ｐ〈０．０１）,ＲＢＣ－ＩＣ花环率则高于正常对照组（Ｐ〈０     

Enhancing cellular immune response to HBV M DNA vaccine in mice by codelivery of interleukin-18 recombinant

OBJECTIVE: To investigate the effect of interleukin-18 (IL-18) on immune response induced by plasmid encoding hepatitis B virus middle protein antigen and to explore new strategies for prophylactic and therapeutic HBV DNA vaccines. METHODS: BALB/c mice were immunized with pCMV-M alone or co-immunized with pcDNA3-18 and pCMV-M and then their sera were collected for analysing anti-HBsAg antibody by ELISA; splenocytes were isolated for detecting specific CTL response and cytokine assay in vitro. RESULTS: The anti-HBs antibody level of mice co-immunized with pcDNA3-18 and pCMV-M was slightly higher than that of mice immunized with pCMV-M alone, but there was not significantly different (P>0.05). Compared with mice injected with pCMV-M, the specific CTL cytotoxity activity of mice immunized with pcDNA3-18 and pCMV-M was significantly enhanced (P<0.05) and the level of IFN-Gamma in supernatant of splenocytes cul-tured with HBsAg in vitro was significantly elevated (P<0.05) while the level of IL-4 had no significant difference (P>0.05). CONCLUSION: The plasmid encoding IL-18 together with HBV M gene DNA vaccines may enhance specific TH1 cells and CTL cellular immune response induced in mice, so that IL-18 is a promising immune adjuvant.     

氯普鲁卡因复合芬太尼硬膜外麻醉在剖宫产中的应用

目的探讨提高硬膜外麻醉效果的方法。方法选择择期或急诊剖宫产患者60例。随机分成三组:A组采用3%氯普鲁卡因行硬膜外麻醉,B组采用3%氯普鲁卡因复合0.1mg芬太尼行硬膜外麻醉,C组行复合腰麻硬膜外麻醉。结果B组麻醉起效时间显著短于A组,麻醉效果显著优于A组(P<0.05),但麻醉效果与C组比较无显著性差异(P>0.05)。结论剖宫产硬膜外麻醉时使用3%氯普鲁卡因复合0.1mg芬太尼能明显提高麻醉效果。