橙皮苷对免疫功能低下小鼠免疫调节作用的实验研究

目的研究橙皮苷(hesperidin,HDN)对小鼠免疫调节的作用。方法腹腔注射环磷酰胺(Cy)复制免疫功能低下的动物模型,测定胸腺、脾脏重量计算脏器指数;碳廓清法测定网状内皮系统吞噬功能;分光光度法测定血清溶血素IgM、IgG(HCIgM、HCIgG);绵羊红细胞(SRBC)的定量溶血测定法(QHS)测定脾溶血空斑形成细胞(PFC);噻唑蓝(MTT)法测定脾淋巴细胞增殖反应;二硝基氟苯(DNFB)诱导迟发型变态反应模型,观察HDN对小鼠迟发型变态反应(DTH)和T淋巴细胞亚群的影响。结果HDN可提高免疫低下小鼠的脏器指数、碳廓清指数K和吞噬指数α;HDN可以改善免疫抑制小鼠低下的脾淋巴细胞增殖反应,恢复小鼠DTH和提高CD4+、CD8+细胞数;对特异性HCIgM、HCIgG和PFC无影响。结论HDN对小鼠的非特异性免疫和特异性细胞免疫反应有促进作用,对特异性体液免疫反应无影响。     

党参多糖对小鼠细胞免疫调节作用

给小鼠ip CPP 200mg/kg·d~(-1)×5d或8d对腹腔Mφ吞噬CRBC、小鼠碳粒廓清和胸腺细胞E花环形成有促进作用,并对ip CY、HCT鼠腹腔Mφ吞噬功能、E花环形成有增强和恢复作用。对DNCB诱发的正常鼠DTH有抑制作用,而对DMS鼠DTH有恢复作用。     

蜂胶胶囊对小鼠免疫功能的影响

目的探讨蜂胶胶囊对正常小鼠免疫调节作用。方法将192只BALB/c小鼠随机分为4批,每批动物分为低、中、高三个剂量组和一个溶剂对照组。其中第一批小鼠进行脏器/体质量比值和小鼠碳廓清实验;第二批小鼠进行抗体生成细胞检测和血清凝血素测定(HC50)和绵羊红细胞诱导小鼠足趾增厚(DTH);第三批小鼠进行腹腔巨噬细胞吞噬鸡红细胞实验;第四批小鼠进行乳酸锂脱氢酶法(LDH)测定NK细胞活性和ConA诱导的小鼠脾淋巴细胞转化实验。结果高剂量组蜂胶胶囊可提高小鼠碳廓清能力(P<0.05),增强绵羊红细胞诱导小鼠DTH能力(P<0.05),促进NK细胞活性(P<0.05)和血清凝血素的生成(P<0.05),并且能促进ConA诱导的小鼠脾淋巴细胞转化能力(P<0.05)和抗体生成细胞数的生成(P<0.05);中剂量和高剂量组蜂胶胶囊能提高小鼠腹腔巨噬细胞吞噬鸡红细胞能力(吞噬百分率P<0.05;吞噬指数P<0.05);但对免疫器官/体质量比值无明显影响。结论蜂胶胶囊对正常小鼠的细胞免疫、体液免疫和单核-巨噬细胞功能和NK功能有促进作用,即具有增强免疫力功能。     

土龙粉对小鼠免疫功能的影响

目的探讨土龙粉对小鼠免疫功能的影响。方法用土龙粉灌胃小鼠7d。通过二硝基氟苯(DNFB)诱导迟发型变态反应(DTH)试验,血清溶血素抗体生成实验和碳粒廓清实验考察土龙粉对小鼠免疫功能的影响。结果土龙粉能明显增加小鼠胸腺、脾的重量,促进DTH作用,显著提高血清溶血素水平,促进单核-巨噬细胞吞噬能力,加快碳粒廓清速率。结论土龙粉对小鼠的免疫功能有明显的增强作用。     

富硒酵母对免疫功能低下小鼠DTH的影响

本文采用环磷酰胺(Cy)诱导免疫功能低下的DTH模型,观察了富硒酵母对DTH的影响.结果发现,Sey(30,60,90mg·kg~(-1)·d~(-1)×6d,ig)对Cy抑制的小鼠DTH有拮抗作用,并能使DTH小鼠低下的脾淋巴细胞ConA增殖反应恢复正常以上;两个较低剂量对Cy所致DTH小鼠免疫器官重量的减轻有抑制作用;两个较高剂量对DTH小鼠低下的脾淋巴细胞LPS增殖反有不同程度的恢复.提示Sey对淋巴细胞的功能有促进作用.     

聚酯型儿茶素对小鼠的免疫调节作用

目的 :研究聚酯型儿茶素对正常小鼠及实验性免疫功能低下小鼠的影响。方法 :选用二硝基氟苯 (DNFB)致小鼠迟发型超敏反应 (DTH)模型、小鼠腹腔巨噬细胞 (PMΦ )吞噬鸡红细胞模型以及血清溶血素生成法 (HC50) ,分别观察对正常小鼠特异性细胞免疫、非特异性细胞免疫和体液免疫功能的影响。以环磷酰胺腹腔注射15mg/(kg·d)×4d造成免疫功能低下的模型 ,采用DTH、碳粒廓清法及血清溶血素生成法测定有关免疫指标。结果 :聚酯型儿茶素 (50、100、200mg/(kg·d)×7d)可明显增强正常小鼠的耳片肿胀度、腹腔巨噬细胞吞噬功能及血清溶血素生成 ,明显提高环磷酰胺所致免疫低下小鼠的DTH反应、碳粒廓清K和α值及HC50 值。结论 :聚酯型儿茶素对正常及免疫功能低下小鼠的细胞免疫和体液免疫均具有增强作用。     

北沙参粗多糖的提取及对阴虚小鼠的免疫调节作用

目的研究北沙参粗多糖(GLP)的滋阴和免疫调节作用。方法提取GLP,制备阴虚小鼠模型,观察对小鼠体重变化、脾脏抗体生成细胞(AFC)、迟发型超敏反应(DTH)和腹腔巨噬细胞吞噬功能的影响。结果GLP可使阴虚小鼠体重明显增加;亦能显著增加阴虚小鼠脾脏AFC的数量,增强DTH反应,而对腹腔MΦ的吞噬百分率和吞噬指数无明显影响。结论GLP具有滋阴补虚作用,可增强体液免疫和细胞免疫功能。     

绿原酸对小鼠免疫功能的影响

目的 考察绿原酸对小鼠细胞免疫和体液免疫的影响.方法 通过DNCB致小鼠耳肿胀的迟发超敏反应(DTH)、小鼠脏器巨噬细胞清除异物的功能、对5%鸡红细胞的吞噬功能的影响以及对环磷酰胺致小鼠溶血素低下的影响实验,研究绿原酸对机体细胞免疫和体液免疫的影响.结果 绿原酸可明显增强DTH的耳肿胀度,增强巨噬细胞吞噬功能,提高机体血清溶血素的含量.结论 绿原酸可明显增强机体细胞免疫和体液免疫的功能.     

八味方对小鼠免疫功能的影响

目的 观察八味方对小鼠免疫器官和吞噬功能的影响.方法 腹腔注射环磷酰胺(CTX)造成免疫功能低下模型;连续灌药7d后检测正常和免疫功能低下组小鼠的脾指数、胸腺指数和巨噬细胞吞噬功能.结果 与结论 八味方能显著提高免疫功能低下组小鼠脾指数、胸腺指数和巨噬细胞吞噬功能(P＜0.01),而正常组小鼠,虽能提高但不显著.     

茶多酚影响老年小鼠免疫功能的实验研究

目的观察茶多酚对老年小鼠免疫功能的影响,判定茶多酚对老年小鼠的免疫作用。方法测定老年小鼠脾悬液中淋巴细胞转化率和腹腔液中巨噬细胞吞噬率。结果茶多酚(0.25、0.5g·kg-1)可显著提高老年小鼠淋巴细胞增殖反应、巨噬细胞吞噬百分率及吞噬指数(P<0.01)。结论茶多酚可增强老年小鼠细胞免疫功能,提高机体巨噬细胞吞噬功能。     

Effects of bis(4-chlorophenyl) sulfone on rats following 28-day dietary exposure.

The short-term oral toxicity of a recently identified environmental pollutant, bis(4-chlorophenyl) sulfone (BCPS), was studied. Groups of male Sprague-Dawley rats (n = 6) were administered BCPS via the diet at 0 (control), 10, 100, or 1000 ppm for 4 wk. Additional control and 1000 ppm groups were also treated for 1, 2, and 3 wk. At termination, high-dose animals showed depressed growth rate and food consumption, and 1 high dose animal in each of the wk-1, -3, and -4 groups had marked hematuria. Increased liver to body weight ratio was present at 100 ppm and increased kidney to body weight ratio at 1000 ppm. Marked increases in hepatic benzoylresorufin O-dealkylase (BROD) and pentoxyresorufin O-dealkylase (PROD) activities were detected starting at 10 ppm. There was a significant decrease in methoxyresorufin O-dealkylase (MROD) activity at 1000 ppm. Hepatic UDP-glucuronosyltransferase (UDPGT) and glutathione S-transferase (GST) activities also increased starting at 100 ppm. A marked increase in urinary excretion of ascorbic acid was apparent starting at 10 ppm, while there were no changes in urinary N-acetylglucosaminidase (NAG) activity and protein levels. A threefold increase in serum cholesterol and a 30% increase in platelet counts were observed in the 1000 ppm group. Levels of thiobarbituric acid-reactive substances (TBARS) were increased by threefold in the liver of the high-dose animals but were not significantly altered in the serum. Tissue BCPS concentrations were dose dependent and followed the order: adipose tissue > liver > kidneys > brain, spleen, lungs. In the time-course study involving the control and high-dose groups, most of the treatment effects were clearly present in wk 1, and the severity of the effects remained at more or less the same levels thereafter. The exceptions were hepatic BROD and PROD activities, which showed a trend toward further increases with time of treatment. Liver and adipose tissue concentrations of BCPS remained unchanged from wk 1 to wk 4, while kidney concentrations increased with time. The results indicated that BCPS produced hepatic effects at the lowest dose level tested (10 ppm in the diet or 0.8 mg/kg/d).     

Immunomodulatory activity of polysaccharide from Acanthopanax obovatus roots.

The effects of the Acanthopanax obovatus polysaccharide (AOPS) as well as its combination with cyclophosphamide (CY) or prednisolone on immune responses were investigated in mice. AOPS (250 mg/kg i.p. x 5) increased the spleen weight and the number of spleen cells, and augmented the phagocytosis of peritoneal macrophages both in normal mice and in immunosuppressed mice. In a haemagglutinin assay AOPS increased the production of specific antibodies and antagonized the suppressive effect of CY. AOPS not only enhanced the degree of in vitro spleen cell-mediated red blood cells (SRBC) hemolysis (quantitative hemolysis of SRBC) but also restored the suppressive effect of CY completely. From these results, AOPS was shown to have an enhancing and a modulating activity on immune responses.     

Inhibitory effect of nocardia rubra cell wall skeleton on splenomegaly induced by Friend leukemia virus in mice

Antitumorigenic effect of Nocardia rubra cell wall skeleton (N-CWS) was evaluated by its ability to prevent splenomegaly induced by Friend leukemia virus (FLV) in C3H/HeN mice. Pretreatment with N-CWS significantly inhibited the splenomegaly as evidenced by the lack of increase in spleen weight but N-CWS given after FLV inoculation had no effect.     

Mechanism of action of BCG vaccine on neoplastic proliferation and host immune responses.

BCG (Bacillus Calmette-Guerin) vaccine, Tice strain, caused a threefold increase in spleen weight of normal animals and a fourfold increase in spleen weight of sarcoma-bearing mice. In the latter group, the BCG vaccine caused infiltration of the sarcoma cells into the peritoneum and tumor metastasis in the spleen. Spleen lymphocytes from mice immunized with neuraminidase-treated sarcoma or from mice that had overcome an inoculum (100 cells) and a challenge (10(4) cells) of sarcoma P-1798 were cytotoxic against 51 Cr- or 14C-2-thymidine-labeled sarcoma cells. The serum of these mice enhanced the cytotoxic activity and inhibited the migration of the syngeneic lymphocytes. These serums also inhibited the migration of peritoneal macrophages from guinea pigs immunized with the sarcoma cells. BCG vaccine enhanced the development and growth of sarcoma P-1798; i.e., 50-100 viable sarcoma cells produced solid tumors in 8% of the untreated animals but in 100% of the BCG-treated animals. The serum of BCG-treated sarcoma-bearing animals inhibited the spleen lymphocyte-mediated cytotoxic action. The spleen lymphocytes from the BCG-treated sarcoma-bearing animals had no effect against 51Cr- or 14C-2-thymidine-labelled sarcoma cells. The data indicate that the serum from BCG-treated sarcoma-bearing animals blocks the spleen lymphocyte-mediated cytotoxic activities directed against proliferation and growth of the sarcoma.     

白藜芦醇抗柯萨奇病毒感染性小鼠心肌炎的实验研究

目的：研究白藜芦醇抗柯萨奇病毒感染性小鼠心肌炎的干预作用并探计其作用机理。方法：对Balb/c小鼠采用柯萨奇病毒CVB3腹腔内注射染毒，制作病毒感染性心肌炎小鼠动物实验模型，采用黄芪煎液作为中药治疗对照，观察白藜芦醇饮水经口给药对模型小鼠的一般情况、生存率、肝脾大体及血清丙二醛(MDA)、一氧化氮(NO)等生化指标及心脏组织病理学的影响。结果：与黄芪煎液中药治疗对照相比，白藜芦醇对柯萨奇病毒感染性心肌炎小鼠的一般情况、生存率、心肝脾大体及血清丙二醛(MDA)、一氧化氮(NO)等生化指标及心脏组织病理学均有良好的改善作用。结论：白藜芦醇对柯萨奇病毒感染性小鼠心肌炎有良好的拮抗作用，对病毒性心肌炎的防治有一定意义。     

蒿甲醚对小鼠血清IgG及脾重的影响

青蒿素与青蒿酯钠的某些免疫作用已有报道。本文报道应用单向免疫扩散测定技术,测定了蒿甲醚对小鼠血清IgG含量的影响,还观察了蒿甲醚对脾脏重量的影响。动物用20～25g JCR纯种小鼠,按雌雄各半随机分组。蒿甲醚(桂林制药厂提供)与氯喹(重庆制药厂生产)均混悬于1％西黄蓍胶,供灌胃用。兔抗小鼠IgG抗血清及标准JCR小鼠血清抗原均为本实验室制备。     

Intranasally administered alpha/beta interferon prevents extension of mouse hepatitis virus, strain JHM, into the brains of BALB/cByJ mice

Intranasally administered alpha/beta interferon blocked extension of the coronavirus, mouse hepatitis virus, strain JHM (MHV-JHM), from the nose to the brain of BALB/cByJ mice following intranasal inoculation with the virus. Two hundred units of alpha/beta interferon were administered intranasally to BALB/cByJ mice daily over a five day period. The mice were exposed intranasally to 10(3) median tissue culture infectious doses of MHV-JHM on the third day of interferon treatment. Two days after virus exposure, the proportion of mice with MHV in nasal turbinates was reduced from 10 of 10 in the untreated group to 7 of 10 in the interferon-treated group, and mean titers in virus-containing noses were lower in the interferon-treated group. Five days after virus exposure, the proportion of mice with infectious virus in the brain was significantly lower in the interferon-treated group (1 of 10 mice) than in the untreated group (10 of 10 mice). Systemic infection, as measured by presence and concentration of virus in the spleen, was not affected by intranasal interferon treatment. These results suggest that intranasally administered interferon protects against local extension of MHV-JHM from nose to brain, but not against dissemination of virus to other organs, such as the spleen.     

口服环孢素对鼠巨细胞病毒慢性感染的影响及其机理

长期口服环孢素(cyclosporine,CsA)使感染鼠巨细胞病毒(murine cytomegalovirus,MCMV)的小鼠脾和唾液腺中病毒滴度显著增高,而且维持脾中病毒的慢性感染。CsA显著降低血清干扰素(interferon,IFN)水平,但对脾天然杀伤细胞(na-tural killer cell,NK cell)活性无明显影响。被动输入免疫鼠脾细胞可保护小鼠免受MCMV感染,而且该保护依赖T细胞,具有病毒特异性和受H-2组织相容抗原(H-2 histocompatibility antigen)限制。长期使用CsA取消了上述保护作用。本实验结果表明CsA可能通过抑制细胞毒性T淋巴细胞及干扰素诱生使MCMV在脏器中滴度升高,并且维持了病毒的慢性感染。     

Enhanced antibody production in W/Wv mice exposed to ozone

To investigate the modulation of defense mechanisms by ozone (O3) exposure, mast-cell-deficient WBB6F1-W/WV and normal WBB6F1(-)+/+ mice were continuously exposed to 0.8 ppm O3 for 7 days. Although no differences in weights of lung, thymus and spleen were shown between exposed and control W/WV mice, antibody response to sheep red blood cells (SRBC) in exposed W/WV mice was markedly enhanced compared to control W/WV mice. In normal +/+ mice O3 exposure induced an increase in lung weight but did not enhance antibody production. These studies suggest that the susceptibility of W/WV mice to O3 may be different from that of +/+ mice.     

茯苓多糖对Lewis肺癌小鼠自发肺转移的抑制作用及其机制研究

目的 研究茯苓多糖对Lewis肺癌小鼠自发肺转移的影响,并探讨其作用机制。方法 C57BL/6小鼠右腋皮下接种Lewis肺癌细胞,分为茯苓多糖高（0.50 mg/只）、低（0.33 mg/只）剂量组,顺铂组（顺铂0.04 mg/只）,模型组（生理盐水）,接种瘤细胞后第2天开始尾iv给药,隔天一次。观察小鼠一般状态,造模后第7天开始,隔天测量肿瘤体积。造模后21 d取肺,计数肺表面转移灶个数,HE染色检测肺微小转移灶个数,检测外周血白细胞数量及脾质量、脾指数。结果 茯苓多糖高、低剂量对实体瘤无明显抑制,茯苓多糖高剂量可减少肺表面转移灶个数,增加白细胞CD11bmRNA表达,不影响外周血白细胞数、脾质量及脾指数,一般状况较好;茯苓多糖低剂量对肺表面转移灶个数、外周血白细胞数、脾质量及脾指数无明显影响,可增加白细胞CD11b、CD18mRNA表达,一般状况较好。结论 茯苓多糖对Lewis肺癌小鼠实体瘤无明显抑制作用,但能够抑制其自发肺转移,对外周血白细胞数量、脾质量及脾指数无明显影响,可增加外周血白细胞CD11b、CD18mRNA表达,活化外周血白细胞可能是茯苓多糖抑制肿瘤转移的机制之一。