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目的:考察拟康氏木霉胞外总多糖的免疫活性.方法:腹腔注射环磷酰胺70mg/kg,造成免疫低下动物模型,灌胃50、100、200mg/(kg.d)剂量的拟康氏木霉胞外总多糖,分别采用碳粒廓清法、血清溶血素法和迟发型变态反应(耳肿胀法),检测该多糖对非特异性免疫、体液免疫和细胞免疫功能的影响.结果:该多糖能提高免疫低下小鼠的胸腺指数和脾指数,提升血清溶血素水平和迟发型变态反应.结论:拟康氏木霉胞外总多糖具有显著的免疫活性. 相似文献
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通过饮用一定时间东亚钳蝎高粱酒，探讨对小鼠免疫功能的影响.对雄性昆明小白鼠连续灌胃蝎子酒(40 g/kg)35天，通过注射绵羊红细胞，进行迟发型变态反应，检测相应免疫指标.结果显示，东亚钳蝎高粱酒组与对照和高粱酒组比较，东亚钳蝎高粱酒组左脚趾的厚度变化较小，血清溶血素水平明显升高，抗体生成数量提高，脏器比重增大，NK细胞活性明显提高，T细胞数量增多.环磷酰胺组能够提高NK细胞活性，但减少T细胞转化率.半浓度东亚钳蝎高粱酒组比单纯环磷酰胺组的免疫功能强大.显示蝎子酒能够有效提高小鼠免疫功能，增强免疫系统对肿瘤细胞的免疫力. 相似文献
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本文以MTT法考察菊叶中总黄酮的体外抗肿瘤活性;以小鼠移植瘤模型测定总黄酮对荷瘤小鼠抑瘤率和腹腔巨噬细胞吞噬能力,研究其体内抗肿瘤活性和免疫调节作用.结果表明,总黄酮对S180细胞生长有显著抑制作用.体内试验表明,与生理盐水组相比,总黄酮对小鼠S180实体瘤有显著抑制作用（P〈0.01）,抑瘤同时可促进体重增长;总黄酮高剂量组可提高荷瘤小鼠的脾指数和胸腺指数.与环磷酰胺组和生理盐水组比较,总黄酮可使荷S180实体瘤小鼠腹腔巨噬细胞吞噬能力升高,表明其对小鼠没有免疫抑制作用. 相似文献
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目的：研究峨眉岩白菜提取物体内外抗肝肿瘤作用。方法：应用MTT法和移植性S180实体荷瘤小鼠。研究不同剂量提取物的体内体外抗肿瘤作用。结果：峨眉岩白菜提取物对体外培养的人肺癌A549细胞增殖有显著的抑制作用。抑制作用与浓度有明显的依赖关系,且随提取浓度的增大,抑制效果越好;荷瘤小鼠模型研究表明,提取物对S180有显著的抑制作用,当剂量为400mg/kg时对肿瘤的抑制效果最好,抑瘤率达52.11％。 相似文献
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目的：考察合欢叶水煎剂不同剂量对小鼠镇静催眠的作用及对戊巴比妥钠诱导小鼠产生催眠作用的量效关系.方法：用两种不同浓度合欢叶水煎液给予小鼠灌胃,就其对小鼠镇静催眠作用产生的影响进行比较,对戊巴比妥钠的催眠作用所产生的影响进行比较.结果：低浓度合欢叶水煎剂可对小鼠产生镇静催眠作用,但作用较慢,协同戊巴比妥钠缩短睡眠潜伏期及延长睡眠时间,高浓度合欢叶水煎液则对小鼠催眠作用起效较快,效果较好,但不能延长睡眠时间.结论：合欢叶具有镇静催眠作用;提示合欢叶在临床用于失眠症时,似以较高剂量为佳.本课题表明合欢叶具有镇静催眠作用,但其作用的剂量关系有待于进一步研究. 相似文献
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紫苏水提取物对小鼠镇静催眠作用的实验研究 总被引：1，自引：0，他引：1
目的研究紫苏水提取物对小鼠的镇静催眠作用。方法通过记录小鼠自主活动次数、阈上剂量及阈下剂量戊巴比妥钠小鼠的镇静催眠时间和对戊四氮致小鼠惊厥的影响,研究紫苏水提取物催眠镇静作用。结果紫苏水提取物可以降低正常小鼠的自主活动、对戊巴比妥钠小鼠具有协同促进动物睡眠作用、紫苏水提取物高剂量组对戊四氮致小鼠的惊厥潜伏期有一定的延长作用。结论紫苏对小鼠具有良好的镇静催眠作用。 相似文献
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豆腐果苷片抗炎镇痛作用研究 总被引：4，自引：0，他引：4
目的:研究豆腐果苷片的消炎、镇痛作用。方法:采用扭体反应法、热板法、二甲苯致小鼠肿胀法、蛋清性大鼠足趾肿胀法、H 致小鼠腹腔毛细血管通透性改变的方法,观察豆腐果苷片的抗炎镇痛作用。结果:豆腐果苷片能显著降低醋酸致小鼠扭体反应次数,提高小鼠痛阈,对二甲苯所致小鼠耳肿胀、蛋清致大鼠足趾肿胀、H 致小鼠腹腔毛细血管通透性均具明显的抑制作用。结论:豆腐果苷片具有明显的抗炎、镇痛作用。 相似文献
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１ Ｉｎｔｒｏｄｕｃｔｉｏｎ ＴｈｅｍａｇｎｅｔｉｃｍａｔｅｒｉａｌｓｂｅｉｎｇｕｓｅｄｉｎｔｈｅｔｒｅａｔｍｅｎｔｏｆｄｉｓｅａｓｅｓａｒｅｏｎｅｏｆｔｈｏｓｅｆａｓｔｅｓｔｇｒｏｗｉｎｇｍｅａｓｕｒｅｓｉｎｍｅｄｉｃａｌｓｃｉｅｎｃｅｉｎＣｈｉｎａ．Ｔｈｅｐｕｒｓｕｉｎｇｆｏｒｔｈｅｒａｐｅｕｔｉｃａｌｍｅｃｈａｎｉｓｍｓｏｆｍａｇｎｅｔｉｃｍａｔｅｒｉａｌｓｉｓａｌｓｏａｎａｒｅａｏｆｔｒａｄｉｔｉｏｎａｌｃｈｉｎｅｓｅｍｅｄｉｃｉｎｅ．Ｉｔｉｓｎｏｗｃｏｎｓｉｄｅｒｅｄｔｏｌｅｓｓｅｎ… 相似文献
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Peng ZF Lan LX Zhao F Li J Tan Q Yin HW Zeng HH 《Journal of Zhejiang University. Science. B》2008,9(1):16-21
Human thioredoxin reductase (TrxR) system is associated with cancer cell growth and anti-apoptosis process. Effects of 1,2-[bis(1,2-benzisoselenazolone-3(2H)-ketone)]ethane (BBSKE), a novel TrxR inhibitor, were investigated on human leukemia cell lines HL-60 and K562. BBSKE treatment induced cell growth inhibition and apoptosis in both cell lines. Apoptosis induced by BBSKE is through Bcl-2/Bax and caspase-3 pathways. Ehrlich's ascites carcinoma-bearing mice were used to investigate the anti-tumor effect of BBSKE in vivo. Tumor-bearing mice treated with BBSKE showed an increase of life span with a comparable effect to cyclophosphamide (CTX). These results suggest a potential usage of BBSKE as a therapeutic agent against non-solid tumors. 相似文献
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通过台盼兰拒染法,以细胞存活率为指标观察超声激活血卟啉对H 22肿瘤细胞在体外的直接杀伤作用;通过小鼠H 22实体瘤模型,以体积和体重变化为指标观察超声激活血卟啉对H 22肿瘤细胞在体内的生长抑制作用.结果表明,超声激活血卟啉在体内体外对H 22肿瘤细胞生长均有明显的抑制作用. 相似文献
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rhEPO和睾酮对低氧小鼠血清ASTase、ALTase、LDHase活性抑制效应 总被引：1，自引：0，他引：1
目的观察ｒｈＥＰＯ和睾酮对低氧小鼠血清ＡＳＴａｓｅ、ＡＬＴａｓｅ、ＬＤＨａｓｅ活性的影响．方法应用低压舱小鼠实验（０．４２ａｔｍ,２２ｈ／ｄ, ６ｄａｙｓ）,分别注射ｒｈＥＰＯ（２００ｕ／ｋｇ·ｄ）、宰酮（２．５ ｍｇ／ｄ）、皮质醇（０．５ ｍｇ／ｄ）,检测血清酶活性、血清 ＥＰＯ浓度和 Ｈｃｔ．结果ｒｈＥＰＯ和睾酮不同程度地抑制低氧小鼠血清酶活性．结论ｒｈＥＰＯ和睾酮对低氧动物肝功能具有不同程度地保护效应。 相似文献
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Objective: To investigate the in-vitro antitumor immune responses of dendritoma formed by mouse hepatocellular carcinoma (HCC) cells and lymphotactin (Lptn) gene modified dendritic cells (DCs). Method: DCs prepared from mouse bone marrow were genetically modified by lymphotactin adenovirus, and fused with H22 cells by polyethylene glycol (PEG). RT-PCR and ELISA were employed to identify lymphotactin expression at mRNA and protein level. Cell phenotypes and fusion efficiency was detected by FACS. The stimulatory effect of DC on T cells was detected by mixed lymphocyte reaction. The cytotoxicity activity against H22 cells was assayed by LDH method. Results: Lymphotactin could be efficiently expressed by DCLptn/H22 hybridoma. DCLptn/H22 cells could induce potent T cell proliferation effect and generate strong cytotoxic T lymphocyte (CTL) reaction against allogenic H22 cells. Conclusion: Lymphotactin genetic modification could enhance the in vitro immune activity of the dendritoma. 相似文献
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目的:探讨牛磺酸锌(TZC)拮抗汞对神经系统的损害作用.方法:选用健康Wistar大鼠64只,昆明种小鼠60只分别随机分组,对照组、染汞组、汞+TZC组,大鼠采用Y迷宫,小鼠采用穿梭实验,观察染汞组和不同浓度TZC组的鼠学习记忆能力的变化.结果:汞可导致大鼠学习记忆能力下降(P<0.05),不同浓度的TZC均可缓解汞致大鼠学习记忆能力下降(P<0.05).结论:TZC在一定程度上能拮抗汞对神经系统毒性作用. 相似文献
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INTRODUCTION Helicobacter pylori (H.pylori) was grouped as a class I carcinogen by the International Agency for Research on Cancer in 1994. A direct relation be-tween H.pylori infection and gastric carcinogenesis was demonstrated in 1998 in an experimental animal model (Watanabe et al., 1998). However, the role of H.pylori in human gastric carcinogenesis is sup-ported almost exclusively by epidemiological data and prospective histopathological studies. So far the mechanism of H.pylor… 相似文献
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Objective: To investigate the distribution of H. pylori antigens in the gastric mucosa in patients with H. pylori infection, and the relationship between the distribution and gastric cancer. Methods: Of 112 patients confirmed by pathological study to have chronic superficial gastritis, precancerous changes (chronic atrophic gastritis, intestinal metaplasia or atypical hyperplasia) and gastric cancer, 28 were H. pylori negative and 84 were H. pylori positive. H. pylori antigens in the gastric mucosa were detected by immunohistochemistry. Results: The H. pylori positive group, comprised 12 of 22 (50.0%) in the chronic superficial gastritis group, 22 of 25 (88.0%) in the precancerous changes group and 13 of 35 (37.1%) in the gastric cancer group. The positive rates of H. pylori antigens in the cytoplasm progressively increased, respectively at 0.0% (0/12),63.6% (14/22) and 84.6% (11/13) for the same groups (χ2=19.76, P=0.000); H.pylori antigens were located in the mucus layer and above the neck of the mucosal gland in 9 of 12 (75.0%) cases with chronic superficial gastritis, at the neck of the mucosal gland and the isthmus in 12 of 22 (54.5%) cases with precancerous changes, below the isthmus in 9 of 13 (69.2%) cases with gastric cancer (x2=25.30, P=0.000). In the H. pylori negative group, no H.pylori antigen was observed. Conclusion: With the progression of chronic superficial gastritis→precancerous changes→gastric cancer, H. pylori antigens progressively migrated from the outer part to the inner part of the cell, and from the superficial to the deep gastric mucosa. 相似文献
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合用醒脑静和脑多肽注射液治疗急性一氧化碳中毒的疗效比较 总被引：2，自引：0，他引：2
目的：观察合用醒脑静注射液和脑多肽注射液治疗急性一氧化碳（CO）中毒的疗效．方法：62例急性CO中毒患者分为醒脑静、脑多肽组（32例）与脑多肽组（3例）,并对二组疗效进行比较结果：醒脑静、脑多肽组的显效率（87.5％）明显高于脑多肽组（60％）,显效时间（18±2.0）小时（h）则明显短于脑多肽组（33±8h）,二组比较均具有显著性差异（P＜0．05,P＜0．01）．但二组总有效率无显著性差异（P＞0．05）．结论：醒脑静注射液与脑多肽注射液配合应用,二者具有协同作用,临床疗效较好,值得推广应用． 相似文献