大豆异黄酮对电离辐射小鼠淋巴细胞的防护作用

目的研究大豆异黄酮(SI)对小鼠淋巴细胞的辐射防护作用。方法24只雄性昆明小鼠,随机分为正常对照组、辐射对照组和辐射补充0.5%SI组,喂养2周后,4.0Gy照射。照射后24 h处死小鼠,取血、胸腺和脾脏分离淋巴细胞,进行血淋巴细胞计数、观察DNA损伤情况;培养胸腺和脾脏淋巴细胞,检测3H-dT掺入量,观察淋巴细胞的增殖能力,计算淋巴细胞的增殖指数。结果辐射使小鼠胸腺和脾脏淋巴细胞数明显减少、胸腺淋巴细胞增殖能力和脾脏淋巴细胞转化指数降低、血淋巴细胞DNA损伤增加,这些变化均具有统计学意义;补充SI可降低胸腺和脾脏淋巴细胞数的减少幅度,降低胸腺淋巴细胞增殖能力和脾脏淋巴细胞转化指数下降幅度,减少辐射对血淋巴细胞DNA损伤程度,其中SI对胸腺淋巴细胞增殖能力和对血淋巴细胞DNA损伤程度的防护作用与辐射对照组相比有统计学意义。结论大豆异黄酮可对小鼠的血、胸腺和脾脏淋巴细胞有一定的辐射防护作用。     

恒定磁场对小鼠免疫功能的影响

目的:从免疫学方面探讨不同照射时间的恒定磁场对小鼠免疫功能的影响。方法:用同一强度不同照射时间的恒定磁场(2小时恒定磁场照射组、3小时恒定磁场照射组、4小时恒定磁场照射组和无磁场照射的正常对照组)对小鼠进行照射,连续20天,每天一次,末次12小时后称其体重,取出胸腺、脾脏、肝脏,称重,计算各器官指数。结果:与正常对照组比较,三组同一强度不同照射时间的恒定磁场组对小鼠的胸腺指数有显著的降低(p<0.05);2小时组与3小时组的肝脏指数也有显著的降低(p<0.05);对脾脏指数无显著影响(p>0.05)。结论:一定照射时间的恒定磁场对小鼠的免疫功能具有抑制作用。     

番石榴多糖对糖尿病小鼠的血糖及胸腺、脾指数的影响

研究采用两种不同方法提取的番石榴多糖对四氧嘧啶致糖尿病的小鼠血糖值及胸腺、脾指数的影响。通过给小鼠腹腔注射四氧嘧啶(200 mg/kg BW)建立糖尿病小鼠模型,尾端取血,采用血糖仪分别在给小鼠灌胃多糖三天和十天后检测小鼠血糖值,第十天解剖小鼠,分别对小鼠胸腺和脾脏称重。结果表明:与糖尿病对照组比较,两组灌喂番石榴多糖的小鼠的生存质量提高,血糖值显著降低,同时胸腺指数显著增加,提示番石榴多糖具有降血糖作用,是一种潜在的糖尿病治疗药物。     

苦参碱联合顺铂对小鼠宫颈癌U14移植瘤抑制作用的影响

目的:探讨苦参碱联合顺铂对小鼠宫颈癌U14移植瘤的抑制作用。方法:制备宫颈癌移植瘤小鼠模型,随机分为苦参碱高、中、低剂量组,顺铂联合苦参碱高、中、低剂量组,顺铂组及对照组8组,给予不同治疗后检测计算肿瘤抑瘤率,胸腺指数,脾脏指数,肌酐及尿素氮水平。结果:1相比对照组,其余各组瘤重均有减少,其中顺铂组、苦参碱高剂量组及联合用药各组瘤重减少明显,差异有统计学意义(P0.01);2相比对照组,顺铂组胸腺指数及脾脏指数显著下降(P0.01),相比对照组及顺铂组,苦参碱组与联合顺铂组胸腺指数及脾脏指数均增高,差异有显著性意义(P0.01);3联合高剂量组肌酐、尿素氮值相比顺铂组显著降低(P0.01),联合中剂量组相比顺铂组减少(P0.05),低剂量组下降不明显(P0.05)。结论:一定浓度的苦参碱对小鼠宫颈癌U14移植瘤有抑制作用,同顺铂联合应用可增强顺铂的抗肿瘤效果,并减轻后者的毒副作用,对机体免疫力提升亦有促进。     

Protective effect of a Potentilla anserine polysaccharide on oxidative damages in mice

Potentilla anserine polysaccharide (PAP) was studied in vivo to investigate its antioxidant activity using the model of dexamethasone-induced oxidative stress in mice. The investigation demonstrated that PAP at 50, 100 or 200 mg/kg body weight for 7 days respectively increased thymus index and spleen index, glutathione level, superoxidase dismutase activity and total antioxidant capacity in both thymus and spleen and decreased the content of H₂O₂ in spleen and NO in both thymus and spleen of mice. The results revealed that PAP was able to overcome dexamethasone-induced oxidative stress and might play an important role in repairs of oxidative damage in immunological system.     

大蒜素对白色念珠菌感染小鼠神经内分泌免疫系统调节作用的研究(英文)

本研究旨在探讨大蒜素对白色念珠菌感染小鼠神经内分泌免疫系统(NEI)的调节作用。将小鼠随机分为三组:正常对照组、模型组、大蒜素组。除正常对照组外,模型组、大蒜素组分别建立小鼠白色念珠菌感染模型。大蒜素组小鼠给予大蒜素灌胃,其余组给予等量生理盐水。连续用药14 d后,各组小鼠取血测定促肾上腺激素(ACTH)、皮质酮(CORT)、β-内啡肽(β-EP)、5-羟色胺(5-HT)的水平,测定胸腺指数及脾脏淋巴细胞增殖活性。实验结果显示,模型组小鼠NEI功能发生紊乱,与正常对照组相比,ACTH、CORT、β-EP水平均明显升高,5-HT、胸腺指数及脾脏淋巴细胞增殖活性均明显下降,差异有显著性(P<0.05)。而大蒜素组小鼠ACTH、CORT、β-EP水平较之模型组明显下降,5-HT、胸腺指数及脾脏淋巴细胞增殖活性明显升高,差异有显著性(P<0.05)。综上所述,本研究提示大蒜素对白色念珠菌感染小鼠紊乱的NEI具有明显的调节作用。     

阿里红黄酮对衰老模型小鼠的抗衰老作用

目的：研究阿里红黄酮对衰老模型小鼠的抗衰老作用。方法：将小鼠随机分为6组（n=12）：正常对照组,衰老模型组,阳性对照组,低、中、高剂量阿里红黄酮组。除正常对照组外,其余各组均采用D-半乳糖颈背部皮下注射建立亚急性衰老小鼠模型,用不同剂量的阿里红黄酮（100、200和400 mg/（kg·d））灌服小鼠6周后,计算衰老模型小鼠脑指数及脾脏指数、胸腺指数,测定其脑组织丙二醛（MDA）含量及谷胱甘肽过氧化物酶（GSH-Px）活性、肝组织过氧化氢酶（CAT）及超氧化物歧化酶（SOD）活性。结果：阿里红黄酮3个剂量组可不同程度的升高衰老模型小鼠的脑指数、脾脏指数、胸腺指数、脑组织中的GSH-Px活性及肝组织中的CAT、SOD活性,降低其脑组织中的MDA含量。结论：阿里红黄酮可能通过提高机体的抗氧化能力而达到抗衰老作用。     

扇贝糖胺聚糖对感染HSV-Ⅰ小鼠免疫功能的影响研究

目的:研究扇贝裙边糖胺聚糖(glycosaminoglycan from Scallop Skirt,SS-GAG)对感染单纯疱疹病毒Ⅰ型(herpes simplex virus type,HSV-Ⅰ)小鼠免疫功能的影响。方法:通过在无菌条件下给予小鼠注射扇贝糖胺聚糖SS-GAG,连续11天,并在给药第三天给小鼠腹腔注射HSV-Ⅰ病毒悬液建立小鼠感染模型,用MTT等方法观察SS-GAG对HSV-Ⅰ感染小鼠腹腔巨噬细胞吞噬活性的影响、对脾脏指数、胸腺指数的影响以及对脾淋巴细胞转化能力等免疫指标的影响。结果:与病毒对照组相比,扇贝糖胺聚糖SS-GAG低剂量组、中剂量组、高剂量组均能显著增强HSV-Ⅰ感染小鼠的腹腔巨噬细胞的吞噬活性和HSV-Ⅰ感染小鼠的脾脏指数和胸腺指数(P0.01),并且能促进其脾淋巴细胞转化增殖能力(P0.01)。结论:扇贝糖胺聚糖在体内有一定的抗Ⅰ型单纯疱疹病毒作用。其抗病毒作用可能与增强机体免疫功能有关。     

Changes in proliferation activity and relative distributions of lymphoid cell subpopulations in congenitally athymic nu/nu mice and lurcher mice with spontaneous olivopontocerebellar degeneration

Changes observed in mice with congenital damage of some part of the CNS-neuroendocrine-immune regulatory system are described. nu/nu mice with congenital absence of thymus and Lurcher mice with spontaneous olivopontocerebellar degeneration displayed changes in the histoarchitecture of adrenal gland, immune organs (thymus, spleen, axillar lymph nodes) and intestine. Changes were also observed in IgM+, IgG+, CD4+ and CD8+ lymphoid cell subpopulations in the main lymphoid organs--the spleen and axillar lymph nodes and in the proliferative ability of whole lymphoid cell populations. The extreme decrease of lymphoid T-cell subpopulations in athymic nu/nu mice is the consequence of the absence of thymus, the organ of their maturation. On the other hand, a relative increase of B-cell subpopulations was found in this mouse strain. A relative decrease of CD4+ lymphocytes and a different influence of immunization on B-cell subpopulations were found in the spleen in neurodeficient Lurcher mice. The high percentage of apoptotic cells, cells in the S-phase of cell cycle and increased proliferation index in nu/nu mice suggest that the turnover and renewal of lymphoid cells in the spleen in nu/nu mice is more rapid than in control immunocompetent BALB/c mice.     

十全育真汤对H22荷瘤小鼠免疫功能的影响

目的：研究十全育真汤对荷瘤小鼠免疫功能的影响,探讨十全育真汤抗肿瘤的作用机制。方法：SPF级雄性昆明种小鼠30只,制成荷H₂₂小鼠肝癌细胞移植瘤模型,随机分为模型组、阳性对照组及十全育真汤组（n=10）;另选择未接种小鼠10只为正常对照组。正常对照组、模型组每天按10 ml/kg灌胃生理盐水及蒸馏水,阳性对照组、十全育真汤组每天按8 g/kg、18 g/kg灌胃参一药液（80 mg/ml）与十全育真汤剂。连续给药14 d后处死小鼠,测量胸腺、脾脏指数及抑瘤率,检测外周血中白细胞、淋巴细胞含量及T细胞亚群CD3、CD4、CD8细胞百分比,血清中白细胞介素2（IL-2）、肿瘤坏死因子α（TNF-α）及干扰素-β（IFN-β）的含量,淋巴细胞增殖能力及NK细胞杀伤功能。结果：较正常对照组,十全育真汤组小鼠体重明显增加,脾脏指数显著增大（P<0.05）;白细胞、淋巴细胞CD4、CD8、CD3及TNF-α含量明显升高（P<0.05）;IL-2、IFN-β含量显著下降（P<0.05）;淋巴细胞增殖能力、NK细胞杀伤功能明显升高（P<0.05）。与模型组相比,十全育真汤组小鼠胸腺、脾脏指数显著增大（P<0.05）;白细胞、淋巴细胞CD3、CD4、IL-2、IFN-β及TNF-α含量明显升高（P<0.05）,CD8含量则显著降低（P<0.05）;NK细胞杀伤功能及淋巴细胞增殖能力显著增加（P<0.05）。结论：十全育真汤可促进H₂₂荷瘤小鼠免疫器官的生长,增强机体免疫功能,有利于肿瘤机体的恢复。     

低氘水对小鼠免疫调节作用的研究

探讨低氘水(deuterium-depleted water,DDW)对小鼠免疫调节的作用。实验组小鼠以低氘水作为饮用水,对照组饮自来水,饲养6周,分别测定免疫蛋白IgG,,IgM的含量,脾脏指数和胸腺指数(mg/g),脾淋巴细胞增殖能力,迟发型变态反应,NK细胞活性以及T细胞亚群CD4+和CD4+/CD8+的变化,观察低氘水对小鼠非特异性免疫和特异性免疫功能的影响。结果低氘水能显著提高IgM,脾脏指数的水平和CD4+,CD4+/CD8+的含量。低氘水对小鼠非特异性免疫和特异性免疫功能具有一定的增强作用。     

五步蛇毒对小鼠免疫功能的影响

目的 探索五步蛇毒对正常小鼠免疫功能的影响.方法 将KM小鼠随机分为5组,分别为空白组、五步蛇毒安全范围内低剂量组(30 mg/kg)、五步蛇毒安全范围内中剂量组(60 mg/kg)、五步蛇毒安全范围内高剂量组(120 mg/kg)(以下简称五步蛇毒低、中、高剂量组)以及西洋参组(30 mg/kg),每组10只.各组小...     

胶原蛋白多肽-铬（Ⅲ）螯合物对糖尿病小鼠免疫力的影响

目的研究胶原蛋白多肽-铬（Ⅲ）（CPCC）螯合物对由四氧嘧啶诱发糖尿病小鼠的免疫力的影响。方法通过腹腔注射四氧嘧啶造小鼠糖尿病模型,观察胶原蛋白多肽-铬（Ⅲ）螯合物对小鼠血糖、脾指数、胸腺指数、脾细胞增殖能力、NK细胞杀伤活性、CD40、CD40L的表达等指标的影响。结果胶原蛋白多肽-铬（Ⅲ）螫合物可以有效预防小鼠血糖升高,对脾指数、胸腺指数有一定的恢复作用,脾细胞增殖能力明显增强,NK细胞的杀伤活性被提高,CD40、CD40L的阳性表达率增加。结论胶原蛋白多肽-铬（Ⅲ）能活化免疫细胞,恢复和改善小鼠机体的免疫功能,提高小鼠机体的免疫力,一定程度地减轻四氧嘧啶的毒性作用,降低血糖。     

Studies of the effects of BCG and Corynebacterium parvum vaccines in experimental infection of mice with influenza virus. Foot pad test, splenic indicator and histologic changes in the thymus gland, spleen and lymph nodes

Evaluation of the influence of BCG and Coparvax on reticulo-endothelial system in mouse was performed. Mice were stimulated i.p. with BCG vaccine and Coparvax vaccine. Spleen index and histological changes in thymus, spleen and lymph nodes were evaluated after 14 days in mice vaccinated with BCG and after 7 days in mice vaccinated with Coparvax. Foot pad test was also performed by giving vaccine into three feet. Tuberculin was injected into mouse foot pad on the day 7th and 14th and a lysate of Coparvax vaccine on the day 7th. Spleen index and foot pad test showed higher values in mice vaccinated with Coparvax than with BCG. Histological changes of thymus, spleen, and lymph nodes showed morphological differences depending on the type of vaccine used. Both preparations were characterized by stimulating effect on reticuloendothelial system, which was much more pronounced after giving Coparvax vaccine.     

重组别藻蓝蛋(rAPC)抑瘤活性及其对免疫作用的研究

目的:观察重组别藻蓝蛋白(rAPC)对接种H22肝癌细胞小鼠的抑瘤活性及其免疫作用.方法:昆明小鼠随机分为5组(10只/组),即模型组、rAPC低、中、高剂量组(25,50,100mg/kg·d)、环磷酰胺组(CY对照组).建立小鼠肝癌1422移植瘤模型,次日除模型组外,其余4组分别以不同剂量的rAPe、CY灌胃,于15d后处死,完整剥离出肿瘤、胸腺、脾脏,准确称重,计算抑瘤率、胸腺指数和脾指数,并采用放免法(PIA)测定血清中白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)的水平.结果:rAPC低剂量组小鼠H22肿瘤质量增长较模型组缓慢(P＜0.05),中、高剂量组较模型组显著缓慢(P＜0.01),抑瘤率分别为25.2%、36.7%、43.1%;rAPC各剂量组能升高胸腺指数、脾指数和血清中细胞因子IL-6、TNF-α的水平.结论:rAPC可有效抑制H22肝癌的生长,促进小鼠胸腺和脾脏的生长发育,提高小鼠的免疫功能,从而抑制肿瘤的生长.     

种间胚胎植入对母体免疫系统T细胞比例的影响

目的:研究种间胚胎植入期母体外周血、外周免疫器官(淋巴结、脾脏)、中枢免疫器官(胸腺、骨髓)中总T细胞的百分比变化,并探讨这种变化对种间胚胎植入的影响.方法:利用荧光标记的单克隆抗体染色结合流式细胞术,检测种间、同种胚胎移植以及同期假孕母体外周血、淋巴结、脾脏、胸腺、骨髓中T淋巴细胞的百分率.结果:种间胚胎植入时其外周血T细胞计数极显著低于同种和同期假孕小鼠(P＜0.01),而淋巴结、胸腺、骨髓中的T细胞计数则极显著高于同期假孕小鼠(P＜0.01).脾脏中同种胚胎植入母体则极显著高于种间和同期假孕小鼠(P＜0.01),两后者之间无显著性差异(P＞0.05).结论:种间妊娠时早在植入期开始,母体全身免疫系统就开始发生不利于种间妊娠的反应.     

木蹄层孔菌子实体提取物对H22荷瘤小鼠体内抗肿瘤活性的影响

研究了木蹄层孔菌子实体的石油醚提取物、氯仿提取物、甲醇提取物对体内抑制肿瘤活性及对免疫功能的影响。建立H22荷瘤小鼠模型,观察木蹄层孔菌不同提取物对荷瘤小鼠的抑瘤效果,通过抑瘤率、免疫器官指数及生存时间的影响来评价不同提取物的活性。结果表明：木蹄层孔菌子实体的石油醚提取物、氯仿提取物、甲醇提取物均有一定的抑制肿瘤作用,其中石油醚提取物下层沉淀的抑制作用最显著,当质量分数为100 mg/kg时抑瘤率高达56.29%,接近阳性药的抑瘤率58.78%,可使小鼠的体质量、脾指数和胸腺指数增加,延长H22荷瘤小鼠的生存时间。木蹄层孔菌石油醚提取物下层沉淀在一定的剂量范围内,能较好地抑制小鼠肿瘤的生长,提高机体的免疫功能。     

枸杞多糖抗氧化作用的研究

目的:研究枸杞粗多糖(Lycium Barbarum Polysaccharide,LBP)在小鼠体内的抗氧化作用。方法:用高(400mg/kg.d)、中(200mg/kg.d)、低(100mg/kg.d)剂量的枸杞粗多糖生理盐水溶液对D-半乳糖(100mg/kg.d)之衰老模型小鼠和正常小鼠灌胃。结果:枸杞粗多糖能较显著(P0.01)提高小鼠血清、肝脏及脑组织中SOD活性,降低MDA含量;极显著(P0.01)提高正常小鼠常压耐缺氧能力和游泳抗疲劳能力;此外小鼠的脾指数和胸腺指数均得到显著提高,表明枸杞粗多糖对提高小鼠的机体免疫水平具有重要的促进作用。结论:枸杞粗多糖对小鼠具有显著的抗氧化、抗衰老作用。     

lack of suppressor cell activity for natural killer cells in infant, aged and a low responder strain of mice

We have examined the reported role of suppressor cells in the regulation of NK activity in mice with naturally low NK activity (infant and aged (C57 X A)F1 hybrids (CAF1) and low responder strain AKR mice). Possible suppressor activity was assayed by mixing, at a 1 : 1 ratio, spleen cells from low activity mice with spleen effector cells from normally active 8 to 10 wk old CAF1 mice. The lytic activity of the mixture was compared with the activity of effector cells diluted with medium alone or diluted 1 : 1 with "non-suppressor" population which served as a control for nonspecific decreases in lysis. The control or "filler" cells employed were suspensions of adult CAF1 thymus, thymus from adult mice exposed to 2,000 R, and adult CAF1 spleen cells cultured for 24 hours, a procedure that depleted NK activity. In no case was the activity observed in the presumed suppressor-effector mixture significantly lower than that observed in the filler-effector cell mixtures. Thus, in infant (1 to 2 wk) and aged (12 to 18 mo) CAF1 mice and in 8 to 10 wk old AKR mice, we found no evidence for specific cell-mediated suppression of natural cytotoxicity.     

Immunomodulatory and antioxidant effects of carboxymethylpachymaran on the mice infected with PCV2

The objective of the current study is to investigate the protective effect of carboxymethylpachymaran (CMP) on the immune system of mice via multiple infections with porcine circovirus type 2 (PCV2). The in vivo results showed that CMP administration significantly improved the spleen or thymus index, promoted the proliferation activities of T or B lymphocytes, and increased the production of glutathione, the superoxidase dismutase capacity, and the total antioxidant capacity in the spleen or thymus of PCV2-infected mice. The administration of different CMP doses to PVC2-inoculated mice resulted in the upregulation of IL-2 and IFN-α or the downregulation of IL-10 levels in the serum. These findings suggest that CMP has potential applications in regulating immunological functions to overcome the immunosuppresion caused by PCV2 infection in mice. The findings may also prove useful in designing effective therapies against PCV2 infection.