冰川棘豆生物碱对小白鼠的毒性研究

将冰川棘豆生物碱粗提物，生物碱结晶Ⅱ和生物碱结晶Ⅰ即2，2，6，6－四甲基－4－哌啶酮（TMPD）分别给小鼠腹腔注射，结果表明，它们具有相似的急性毒性，症状为活动减少，闭目，不安，震颤，惊厥，呼吸困难和死亡。小鼠口服TMPD的LD50为935．4mg/kg,95%可信限为852．7－1021.4mg/kg，有每日200，300和400mg/kg剂量TMPD灌胃小鼠，30d左右出现目光呆滞，被毛粗乱，卧地，头部上下颤震，蹒珊行走等轻微的疯草中毒症。35d时进行检查发现，主要病理变化为肝脏，大脑和和小脑空泡变性。此外，中央静脉、小叶间静脉和叶下静脉以及肝窦隙扩张淤血，有的肝细胞大或轻度溶解，胞内出现多数红色细小颗粒，胞核大小和染色不一，窦壁细胞轻度肿胀增生；小脑蒲肯野氏细胞不同程度溶解，尼氏小体减少，大脑出血，胞核固缩。     

The effects of deltamethrin on some serum biochemical parameters in mice

Sixty white male mice were used in this study. Three groups, each comprising 20 mice were established. The control group (Group 1) was provided ad libitum pellet feed. On the other hand, the experimental groups, namely, Groups 2 and 3 were given pellet feed containing deltamethrin throughout the day, so that the animals were administered doses of 7.5 and 30 mg/kg/body weight/day, respectively. Blood samples were collected from all groups on the 15th, 30th, 45th, and 60th days of the experiment for measurement of serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), alcaline phosphatase (ALP), amylase and cholinesterase activities, and levels of glucose, urea, creatinine, triglyceride, cholesterol, calcium, phosphor, sodium, potassium, and chloride. According to data obtained, on the 15th day of the study, compared to the control group, statistically significant increase in urea, cholesterol, ALP, cholinesterase, calcium, and potassium levels/activities, and significant decrease in SGOT activity and chloride levels in Group 2, and significant increase in cholesterol, ALP, cholinesterase, calcium, potassium and chloride levels/activities in Group 3, and significant decrease in SGOT activity in Group 3 were determined. On the 30th day of the study, in comparison to the control group, triglyceride and cholesterol levels and ALP activity were determined to be significantly increased in the Group 2, whereas SGOT activity were significantly reduced in Group 2, and triglyceride and cholesterol levels were demonstrated to be significantly increased and SGOT activity was significantly reduced in Group 3. On the 45th day of the study, compared to the controls, significant increase in cholesterol and sodium levels, and significant decrease in triglyceride levels and ALP activity in Group 2, significant increase in creatinine, cholesterol and sodium levels and cholinesterase activity, and significant decrease in glucose, SGPT, ALP and phosphor levels/activities were detected in Group 3. On the 60th day, in other words, in the last period of the study, ALP activity, and triglyceride, calcium, and phosphor levels were determined to be significantly increased and significant decrease in amylase activity in Group 2. Furthermore, significant increase in triglyceride, ALP, amylase, calcium, phosphor, and potassium levels/activities, and significant decrease in glucose and creatinine levels were observed in Group 3. However no correlation was determined to exist between the changes were found to be statistically significant, and the administration dose and duration of deltamethrin in all periods and groups.     

Influence of Fu Fang Xiao Chai Hu Tang on level of interleukin-2 and value of CD4+/CD8+ in mice bearing Ehrlish ascites carcinoma

AIM: To investigate the effects of Fu Fang Xiao Chai Hu Tang (FFXCHT) on level of Interleukin-2 and value of CD4+/CD8+ in mice bearing Ehrlish ascites carcinoma(EAC).METHODS: The effects of FFXCHT on the EAC were observed and index of thymus and spleen were observed.The method of ［3H］-TdR incorporation was used to measure the IL-2 level,and the value of CD4+/CD8+ was assayed by ELITE calibur flow cytometry.RESULTS: Compared with the model group,FFXCHT inhibited the growth of EAC (P<0.01).The index of thymus and spleen of the model group were higher than that in the control group (P<0.05).Compared with the model group,FFXCHT increased the index of thymus and spleen,the IL-2 level and the value of CD4+/CD8+ (P<0.05),especially with the middle dose.CONCLUSION: The FFXCHT has antitumor effect.Increased IL-2 level and the value of CD4+/CD8+ play a regulatory role in the immunologic function in mice bearing EAC.     

蜂王浆复方降血糖作用的初步研究

采用一种特制的蜂王浆中药复方制剂（FSL），通过实验性糖尿病模型，以高（800mg／kg），中（500mg／kg），低（300mg／kg）3个剂量组对试验动物进行灌胃试验。结果显示：蜂王浆复方降糖制剂可显著拮抗四氧嘧啶，肾上腺素引起的血糖升高，且对正常小鼠的血糖值无明显影响，且不会影响正常的糖代谢过程。毒理研究结果表明其最大耐受量为60．00g／kg。     

Study on biological activity of thrombopoietinⅡ in vivo

AIM: To investigate the biological activity of thrombopoietin Ⅱ(TPOⅡ) in vivo, which consists of two new kinds of ligand binding with thrombopoietin receptor. METHODS: Purified ligandⅠof TPOⅡ, artificial compound ligandⅡ of TPOⅡand rhTPO were injected into purebred Babl/c mice respectively in 7 days by intraperitoneal injection once for a day. Then the biological activity of TPOⅡ was analyzed by measuring peripheral platelet counts by the end of the seventh day. RESULTS: On the seventh day, the platelet counts of mice treated by ligandⅠof TPOⅡ were higher than that in the negative control group(P＜0.05), while not significantly different from the platelet counts of mice treated by rhTPO(P＞0.05). On the fourteenth day, the platelet counts increased in two all experimental groups of TPOⅡcompared with negative control group(P＜0.01), while not significantly different from the platelet counts of mice treated by rhTPO too(P＞0.05). Moreover the platelet counts of mice in two experimental groups of TPOⅡ and the positive group showed increase with experimental days. CONCLUSION: The purified ligandⅠof TPOⅡ had obvious activity in increasing platelet production, which is not different from the effect of rhTPO.     

转座子介导细胞质显微注射技术的基因转移效率比较

为了比较和探索SB(sleeping beauty)、PB(piggyBac)和T012 3种转座子介导下的细胞质显微注射法在小鼠(Mus musculus)和斑马鱼(Danio rerio)上的转基因效率,本研究将包含3种转座子的重组载体pT3-PST-CAG-GFP分别与3种转座酶表达载体以1:1质量比混合,显微注射至小鼠和斑马鱼受精卵细胞质,经体外培养后在胚胎发育不同时期用荧光显微镜检测报告基因绿色荧光蛋白(green fluorescent protein,GFP)阳性率,结果显示,在培养至4 Ed(96 h)(Ed: embryo day,胚胎发育的天数)的小鼠胚胎中,PB转座子介导的GFP转基因阳性率最高,达52％(N=281),显著高于SB的47％ (N=328)和To12的36％ (N=273)(P＜0.05);而受精后36和60 h (hour past fertilization,hpf)斑马鱼胚胎中,荧光显微镜检测表明,To12的GFP阳性率分别为36％(N=677)和37％(N=685),显著高于SB(28％ N=691和27％ N=708)和PB(30％ N=687和32％ N=675)(P＜0.05);转座子介导的细胞质显微注射可获得较高的转基因效率,且转座子活性具有物种差异性,在哺乳动物胚胎中PB转座子的基因转移效率最高,而在鱼类胚胎中To12转座子的基因转移效率最高.本研究为提高动物转基因效率研究提供重要参考资料.     

猪用生长激素脂质体对小鼠的促生长作用

[目的]研究猪用生长激素（porcine somatotropin,PST）脂质体对小鼠的促生长作用与缓释效果。[方法]将试验小鼠随机分组,试验组小鼠分别腹腔注射PST纯品和PST脂质体,对照组腹腔注射生理盐水。分别于7、14和28 d后称重,计算小鼠增重率。[结果]试验组小鼠增重与对照组差异显著（P〈0.05）,表明PST和PST脂质体对小鼠有促生长作用,且PST脂质体具有明显的缓释效果。[结论]PST脂质体缓释期长达7 d以上,具有显著的促生长效果。     

Role of the suppressor of cytokine signaling 2 (SOCS2) during meningoencephalitis caused by Bovine herpesvirus 5 (BoHV-5)

The role of suppressors of cytokine signaling (SOCS) in meningoencephalitis caused by Bovine herpesvirus 5 (BoHV-5) was evaluated by intracranial infection in C57BL/6 wild-type mice (WT) and SOCS2 deficient mice (SOCS2^−/−). Both infected groups presented weight loss, ruffled fur and hunched posture. Additionally, infected SOCS2^−/− mice showed swollen chamfer and progressive depression. Infected WT animals developed mild meningitis, characterized by infiltration of mononuclear cells. Moreover, viral DNA was detected in liver and lung from infected WT group. This group also showed elevated brain levels of IFN-γ, IL-10, CXCL1 and CCL5, when compared with non-infected WT animals. Brain inflammation was exacerbated in infected SOCS2^−/− mice with widespread distribution of the virus and increased brain levels of TNF-α, IFN-γ, IL-10, IL-12, CXCL1 and CCL5, when compared with WT infected mice. Moreover, infected SOCS2 deficient mice exhibited reduced brain mRNA expression of IFNα and IFNβ and increased expression of mRNA of SOCS1, compared with infected WT mice. Taken together, our study provides an insight into the role of SOCS2 in modulating the immune response to BoHV-5 infection.     

贵州凤岗富锌富硒绿茶对小鼠抗氧化抗衰老作用的研究

[目的]采用分子生物学技术,探讨贵州凤岗富锌富硒绿茶对小鼠抗氧化、抗衰老的作用及机制。[方法]腹腔注射D-半乳糖建立小鼠衰老模型,空白组给予腹腔注射0.9%生理盐水。造模14 d后,根据中国营养学会推荐每日饮茶量及实验动物药物剂量比例,给小鼠灌胃富锌富硒绿茶,1次/d。连续灌胃21 d后,采用Morris水迷宫进行行为学实验。处死小鼠,采用蛋白免疫印迹法(western-blotting)检测各小鼠肝脏组织中超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)的表达。采取RT-PCR法,测定各小鼠肝脏组织中SOD和GSH-Px的mRNA转录水平。[结果]富锌富硒绿茶对衰老小鼠学习记忆能力有一定的改善作用,并且提高SOD和GSH-Px的mRNA及蛋白质表达水平(P0.01)。[结论]富锌富硒绿茶提高机体的抗氧化能力及免疫功能,在一定程度上具有延缓衰老的作用。     

番石榴提取液对小鼠免疫功能的影响

为了更好的了解番石榴的药用价值,对番石榴采用水提取法进行提取,并将提取液作用于健康小鼠。通过检测小鼠胸腺重量、脾脏重量、胸腔吞噬细胞吞噬功能、T淋巴细胞转化率和血清血溶素含量,得到胸腺、脾脏指数、吞噬指数,吞噬率分别是5.934、7.692、20.419、29.194,与对照组做比较差异极显著;T淋巴细胞转化率、血清溶血素抗体积数分别是60.37、108.37,与对照组做比较差异显著,表明番石榴提取液具有提高小鼠免疫能力的作用。