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冀鹏 《邯郸职业技术学院学报》2008,21(2)
研究Balb/C小鼠接种S180肉瘤细胞后进行力竭性游泳,记录运动时间并观察其生存规律,为进一步研究适量有氧运动干预肿瘤生长奠定基础。得出的结论为S180肉瘤细胞接种Balb/C小鼠的肿瘤发生率为100%,生存期、瘤重、肿瘤体积无显著性差异,运动时间按生存时间呈现递减式下降规律。 相似文献
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小鼠黑色素瘤移植瘤中血管生成拟态的时空变化 总被引：1，自引：0，他引：1
目的:利用小鼠移植瘤模型动态观察血管生成拟态的时空变化.方法:采用B16黑色素瘤细胞和C57小鼠制作小鼠恶性黑色素移植瘤动物模型,成瘤后根据随机数字表每天随机抽取一只小鼠处死,共12d,获得肿瘤样本114例.常规HE染色和CD31、PAS染色.显微镜下分别计数肿瘤组织中央区和外周区的高倍视野(×400)下血管生成拟态以及内皮依赖性血管.结果:在移植瘤形成的第1～8天,肿瘤组织内存在血管生成拟态.第9～12天该结构被内皮依赖性血管替代.肿瘤中央区、外周区血管生成拟态密度均呈现先递增后递减趋势;两个区域内的血管生成拟态密度比较:在第1～6天内肿瘤中央区高于外周区,在第7～8天肿瘤外周区高于中央区.内皮依赖性血管在肿瘤组织的中央区和外周区呈现递减趋势.两个区域内的内皮依赖性血管密度比较:在第1～7天肿瘤中央区内皮依赖性血管密度高于外周区,在第8～12d两个区域内的内皮依赖性血管密度无明显差别.血管生成拟态密度与肿瘤组织的坏死率之间呈密切负相关(r=-0.978,P<0.05);内皮依赖性血管密度与肿瘤组织坏死率之间亦存在负相关(r=-0.230,P<0.05).结论:黑色素瘤移植瘤中血管生成拟态是肿瘤细胞为适应环境而产生的一种暂时性的血液供应方式,与内皮依赖性血管并存于肿瘤组织内.随肿瘤生长变化而与内皮依赖性血管之间存在一定的时空变化规律. 相似文献
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目的:研究新型溶瘤腺病毒GP73-SphK1sR-Ad5对肝癌细胞生长的抑制作用。创新点:GP73-SphK 1sR-Ad5是一种新型的溶瘤腺病毒,可以特异及有效地抑制肝癌细胞生长,为肝癌的临床治疗提供新思路。方法:通过整合高尔基体蛋白73(GP73)及鞘氨基醇激酶1(SphK 1)构建了GP73-SphK1sR-Ad5腺病毒,进而转染肝癌Huh7细胞及正常HL7702肝细胞。通过实时定量PCR和蛋白印记实验检测Sph K1和E1A基因的表达;通过四氮唑盐比色分析法(MTT法)检测细胞活力;通过流式细胞术检测细胞凋亡率。构建Huh7异种移植小鼠模型,并注射GP73-SphK1sR-Ad5腺病毒。20天后,记录小鼠肿瘤体积和重量,以及存活时间。用苏木精-伊红(HE)染色法和透射电镜(TEM)观察肿瘤组织的病理变化。结果:GP73-SphK 1sR-Ad5转染显著上调了Huh7细胞中E1A的表达,下调了SphK 1的表达,降低了细胞活性,并提高了凋亡率,然而对HL7702细胞无明显影响。Huh7异种移植小鼠模型内注射GP73-SphK 1sR-Ad5显著降低了肿瘤的体积和重量,延长了小鼠的存活时间,并降低了肿瘤组织中的肿瘤浸润面积、血管密度及核变形和染色质浓缩的细胞数。结论:新型溶瘤腺病毒GP73-Sph K1s R-Ad5可以特异和有效地抑制肝癌进展。 相似文献
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目的：探讨肺癌小鼠CD4＋T细胞、CD8＋T细胞和骨髓源性抑制细胞（ MDSC）的比例和数量变化。方法：采用LLC细胞皮下接种制备小鼠肺癌肿瘤模型,流式细胞仪检测肿瘤小鼠骨髓、脾脏、淋巴结内CD4＋T细胞、CD8＋T细胞和MDSC的数量变化。结果：与正常对照小鼠相比,肿瘤小鼠脾脏、淋巴结内CD4＋T细胞、CD8＋T细胞的比例和数量显著降低,骨髓CD4＋T细胞变化不明显,但CD8＋T细胞显著减少。 MDSC 在肿瘤小鼠骨髓、脾脏和淋巴结内的比例和数量则显著增加。结论：肺癌小鼠T细胞数量降低而MDSC细胞数量增加,诱导对肿瘤细胞的免疫耐受。 相似文献
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目的:探讨雄黄对小鼠胃癌细胞株M FC的抑制作用.方法:采用小鼠腋下接种肿瘤细胞悬液,再给予剂量为6.5mg/10g的雄黄液灌胃,观察肿瘤生长变化.结果:雄黄对MFC的抑瘤率为65.4%.结论:雄黄对MFC的生长具有明显的抑制作用. 相似文献
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目的：应用细胞微囊化方法、病理技术研究微囊化大鼠胰岛细胞与睾丸Sertoli细胞联合移植对糖尿病小鼠血糖的影响及Sertoli细胞对共移植的胰岛细胞的免疫豁免作用。方法：将30只小鼠随机分为2组,每组15只。第一组为胰岛细胞微囊化移植组,第二组为胰岛细胞与睾丸Sertoli细胞联合微囊化移植组,建立糖尿病模型后,两组均采用腹腔注射的方法将微囊植入糖尿病小鼠体内,术后两组均不使用免疫抑制剂,定期检测小鼠的血糖情况,比较两组之间胰岛细胞有功能存活时间的不同以及微囊的病理学改变。结果：胰岛细胞与睾丸Sertoli细胞联合微囊化移植组与胰岛细胞微囊化移植组相比,联合移植组胰岛细胞存活时间长于单纯移植组（P〈0．05）,囊周淋巴细胞侵润程度轻于单纯胰岛细胞移植组。结论：睾丸Sertoli细胞对共移植的胰岛细胞具有免疫豁免作用,可以延长胰岛细胞有功能存活时间,减轻排斥反应,降低囊周淋巴细胞侵润程度。 相似文献
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盐生隐杆藻胞外多糖(EPAH)抗肿瘤作用的实验研究 总被引：1，自引：0，他引：1
目的:探讨盐生隐杆藻胞外多糖对小鼠抗肿瘤作用的影响.方法:建立小鼠移植性S180实体瘤模型,观察EPAH对S180荷瘤小鼠的抑瘤作用、对白细胞的数量、对免疫器官及红细胞粘附肿瘤细胞能力的影响;另建立小鼠移植性S180腹水瘤模型,观察EPAH对小鼠存活时间的影响;同时,通过体外培养检测EPAH对SMMC7721细胞增殖的影响.结果:EPAH能明显抑制S180、SMMC7721细胞生长、促进红细胞粘附肿瘤细胞能力、增强免疫力并能有效提升减少的白细胞数量.结论:EPAH能显著增强小鼠抗肿瘤活性. 相似文献
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纯化伤寒杆菌HSP70,观察其对小鼠S180肿瘤细胞的抑制作用,对荷瘤小鼠连续皮下注射伤寒杆菌HSP70,每只小鼠每天注射100μ／mL,的伤寒杆菌HSP70．5mL,每天一次．9天后处死小鼠,剥离肿瘤,分别称量实验组与对照组小鼠肿瘤的重量．结果表明,伤寒杆菌HSP70能明显抑制小鼠S180肿瘤细胞在小鼠体内的生长． 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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黄芪成分F_3新制剂抗肿瘤的实验研究 总被引：3，自引：0，他引：3
[目的]研究黄芪成分F_3新制剂对荷瘤小鼠生存期及实体瘤生长抑制的影响。[方法]纯系Balb/c小鼠荷瘤后随机分组,连续用药10d,观察腹水荷瘤小鼠的生存时间;观察抑瘤率的小鼠于荷瘤第15d后处死,剥瘤称重。[结果]腹腔注射黄芪成分F_3新制剂能显著延长腹水荷瘤小鼠的生命延长率;对U_(14)、S_(180)实体瘤的抑瘤率分别达71.29％、70.97％。[结论]黄芪成分F_3新制剂对荷瘤小鼠具有显著的抑癌作用。 相似文献
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Objective: To investigate the anti-tumor efficacy of dendritic cell (DC)-based vaccines pulsed with tumor extracts or RNA in a mouse model of intracranial G422 glioblastoma. Methods: Bone marrow-derived DCs were pulsed ex vivo with tumor extracts or RNA. Ninety female mice harboring 4-day-old intracranial G422 glioblastomas and 126 normal mice were treated with three spaced one week apart subcutaneous injections either with PBS, unpulsed DCs, G422 tumor extracts, RNA, DCs pulsed with G422 tumor extracts (DC/extract) or with RNA (DC/RNA). Seven days after the third immunization of normal mice, the spleens of 36 of them were harvested for cytotoxic T lyphocyte (CTL) assays and the others were challenged in the brain with G422 tumor cells. All the treated mice were followed for survival. Some mice brains were removed and examined pathologically when they died. Results: Immunization using DC/extract or DC/RNA significantly induced G422-specific CTL responses compared with control groups (P＜0.01). Vaccination with DC/extract or DC/RNA, either prior to G422 tumor challenge or in tumor-harboring mice, significantly prolonged survival compared with other control groups (P＜0.01). Conclusion: DCs pulsed with tumor extracts or RNA derived from autologous tumors has potential antitumor effects via activation of cell-mediated immunity. Our results suggest a useful therapeutic strategy against gliomas. 相似文献
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Objective: To investigate the anti-tumor efficacy of dendritic cell (DC)-based vaccines pulsed with tumor extracts or RNA in a mouse model of intracranial G422 glioblastoma. Methods: Bone marrow-derived DCs were pulsed ex vivo with tumor extracts or RNA. Ninety female mice harboring 4-day-old intracranial G422 glioblastomas and 126 normal mice were treated with three spaced one week apart subcutaneous injections either with PBS, unpulsed DCs, G422 tumor extracts, RNA, DCs pulsed with G422 tumor extracts (DC/extract) or with RNA (DC/RNA). Seven days after the third immunization of normal mice, the spleens of 36 of them were harvested for cytotoxic T lyphocyte (CTL) assays and the others were challenged in the brain with G422 tumor cells. All the treated mice were followed for survival. Some mice brains were removed and examined pathologically when they died. Results: Immunization using DC/extract or DC/RNA significantly induced G422-specific CTL responses compared with control groups (P<0.01). Vaccinatio 相似文献
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研究旨在通过MTT法从萘酰亚胺为母体合成的一系列化合物中,筛选出能够高效诱导肿瘤细胞凋亡的化合物C8。研究方法为选用不同组织来源的肿瘤细胞系MCF-7、Hela、U-251和SMMC-7721通过MTT比色法测定不同浓度的萘酰亚胺类化合物作用不同时间后对细胞体外培养的抑制影响。实验结果显示若干种亚胺类化合物中,只有化合物C8对上述肿瘤细胞的生长都具有明显的抑制作用,并随时间延长更为显著,其他化合物无显著性,进而推测化合物C8能够明显抑制不同组织来源的肿瘤细胞生长,并与剂量和时间呈正相关关系,具有高效诱导肿瘤细胞凋亡的作用。 相似文献
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磁场结合抗肿瘤药物作用于肿瘤细胞后能有效抑制肿瘤生长,这种观点己被近年来的许多实验所证实,本文论述了磁场联合抗肿瘤药物抑制肿瘤的生物学效应（包括对细胞生长活性、细胞膜、细胞周期以及荷瘤动物肿瘤生长、生存时间等各方面的影响）,从离体和在体两个方面对近年来抗肿瘤药物结合磁场在肿瘤治疗中的相关研究进展作了简要综述,并就该领域研究应用中可能出现的问题提出看法。 相似文献
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Qiong-yan Lin Yi-feng Wang Hui-nan Weng Xiu-jie Sheng Qing-ping Jiang Zhi-ying Yang 《Journal of Zhejiang University. Science. B》2012,13(11):894-903
Background and objective: Gonadotropin-releasing hormone (GnRH) plays an important role in the regulation of ovarian function and ovarian cancer cell growth. In this study, we determined whether administration of the GnRH agonist (GnRHa), triporelin, prior to cisplatin treatment affects cisplatin and/or prevents cisplatin-induced ovarian damage. Methods: nu/nu mice were injected with ovarian cancer OVCAR-3 cells intraperitoneally. After two weeks, the mice were treated with saline (control), cisplatin, GnRHa, or cisplatin plus GnRHa for four weeks. At the end of the experimental protocol, blood, tumor, ovary, and uterine tissues were resected for hematoxylin and eosin (H&E) staining, immunohistochemical analyses of Ki67, nuclear factor-κB (NF-κB), and caspase-3, transmission electron microscopy of apoptosis, or enzyme-linked immunosorbent assay (ELISA) analyses of anti-Mullerian hormone (AMH). Results: Cisplatin treatment effectively inhibited tumor growth in mice treated with human ovarian cancer cells; however the treatment also induced considerable toxicity. Immunohistochemical analyses showed that Ki67 expression was reduced in cisplatin-treated mice compared to control (P<0.05), but there was no statistically significant differences between cisplatin-treated mice and cisplatin plus GnRHa-treated mice (P>0.05), while expressions of NF-κB and caspase-3 were reduced and induced, respectively, in cisplatin-treated mice and cisplatin plus GnRHa-treated mice. Apoptosis occurred in the GnRHa, cisplatin, and cisplatin plus GnRHa-treated mice, but not in control mice. Ovaries exposed to GnRHa in both GnRHa mice and cisplatin-treated mice (combination group) had significantly more primordial and growth follicles and serum levels of AMH than those in the control mice and cisplatin-treated mice (P<0.05). Conclusions: Administration of GnRHa to mice significantly decreased the extent of ovarian damage induced by cisplatin, but did not affect the anti-tumor activity of cisplatin. 相似文献
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1IntroductionNeural stem cells have great potential for use intreating neural damage and neurodegenerative disor-ders such as Parkinson’s Disease and Alzhei mer’s Di-sease.They are undifferentiated elements found inboth the embryonic and adult brain[1].Growth factor-responsive cells fromthe embryonic and adult controlnervous system(CNS)were isolated and culturedinvitrointhe early1990’s[2-4].Thelocation of CNS stemcells in the adult brain were therefore identified[5]mainlyinthe striatum,… 相似文献