目的:观察脑瘤散对G422脑胶质瘤小鼠的抗肿瘤作用。方法:将70只小鼠接种G422脑胶质瘤瘤株,次日按体重分层随机分配法分为七组,分别为:模型组、脑瘤散高剂量组、脑瘤散中剂量组、脑瘤散低剂量组、阳性药对照组(CTX组)、脑瘤散低剂量+CTX...目的:观察脑瘤散对G422脑胶质瘤小鼠的抗肿瘤作用。方法:将70只小鼠接种G422脑胶质瘤瘤株,次日按体重分层随机分配法分为七组,分别为:模型组、脑瘤散高剂量组、脑瘤散中剂量组、脑瘤散低剂量组、阳性药对照组(CTX组)、脑瘤散低剂量+CTX组和脑瘤散高剂量+CTX组,每组10只。CTX只于第1日给药1次,模型组每日每只给予0.1 m l的生理盐水,脑瘤散连续给药11 d。各组小鼠停药后次日处死,取其肿瘤称重,计算抑瘤率,并对瘤组织进行病理学检查,实验共重复3次。结果:脑瘤散中、高剂量组小鼠瘤重均明显低于模型组(P<0.05)。脑瘤散与CTX联合用药的两组抑瘤率均高达90%以上,并高于CTX组。结论脑瘤散对小鼠G422脑胶质瘤的生长、浸润具有明显抑制作用,且可增加化疗药物的疗效。展开更多
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 pulse...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.展开更多
目的:探讨HPPH光动力治疗对鼠G422脑胶质瘤突变型p53蛋白和p16蛋白表达的影响并和HpD做比较。方法:建立鼠G422脑胶质瘤皮下移植瘤模型,设立空白对照组、单注射HPPH组(0.45mg/kg)、单665nm激光照射组、HPPH-PDT组(0.15mg/kg组、0.3mg/kg...目的:探讨HPPH光动力治疗对鼠G422脑胶质瘤突变型p53蛋白和p16蛋白表达的影响并和HpD做比较。方法:建立鼠G422脑胶质瘤皮下移植瘤模型,设立空白对照组、单注射HPPH组(0.45mg/kg)、单665nm激光照射组、HPPH-PDT组(0.15mg/kg组、0.3mg/kg组、0.45mg/kg组)、HpD-PDT组(5mg/kg)。单注射HPPH组、HPPH-PDT组和HpD-PDT组自尾静脉推注入光敏剂,24h后以波长665nm的半导体激光照射HPPH-PDT组和单激光组肿瘤,功率密度200mW/cm^2,每光斑照射17min,能量密度为204J/cm^2;以波长630nm的半导体激光照射HpD-PDT组肿瘤,功率密度200mW/cm^2,每光斑照射20min,能量密度为240J/cm^2。于PDT后9d处死鼠行酶联免疫吸附法(ELISA)的双抗体夹心法检测HPPH-PDT和HpD-PDT后突变型p53蛋白(mutant type p53 protein,mtp53)和p16蛋白表达变化。结果:空白、单注药和单照光三组对照组之间mtp53蛋白和p16蛋白表达值两两比较,差异无统计学意义(P>0.05)。HPPH-PDT各剂量组与空白对照组比较,mtp53蛋白表达值明显降低,p16蛋白表达值明显升高,差异有统计学意义(P<0.01)。0.3mg/kg组和0.45mg/kg组与0.15mg/kg组相比,mtp53蛋白表达值降低,p16蛋白表达值升高,差异有统计学意义(P<0.05),0.45mg/kg组mtp53蛋白表达值稍低于0.3mg/kg组,p16蛋白表达值稍高于0.3mg/kg组,差异无统计学意义(P>0.05)。HPPH-PDT0.3mg/kg组和0.45mg/kg组的mtp53蛋白表达值低于HpD-PDT组,p16蛋白表达值高于HpD-PDT组,差异有统计学意义(P<0.05)。结论:HPPH-PDT0.3mg/kg是适宜的HPPH剂量。HPPH-PDT诱导mtp53蛋白表达降低,p16蛋白表达升高。与HpD-PDT相比,HPPH-PDTmtp53蛋白表达更低,p16蛋白表达更高。展开更多
文摘目的:观察脑瘤散对G422脑胶质瘤小鼠的抗肿瘤作用。方法:将70只小鼠接种G422脑胶质瘤瘤株,次日按体重分层随机分配法分为七组,分别为:模型组、脑瘤散高剂量组、脑瘤散中剂量组、脑瘤散低剂量组、阳性药对照组(CTX组)、脑瘤散低剂量+CTX组和脑瘤散高剂量+CTX组,每组10只。CTX只于第1日给药1次,模型组每日每只给予0.1 m l的生理盐水,脑瘤散连续给药11 d。各组小鼠停药后次日处死,取其肿瘤称重,计算抑瘤率,并对瘤组织进行病理学检查,实验共重复3次。结果:脑瘤散中、高剂量组小鼠瘤重均明显低于模型组(P<0.05)。脑瘤散与CTX联合用药的两组抑瘤率均高达90%以上,并高于CTX组。结论脑瘤散对小鼠G422脑胶质瘤的生长、浸润具有明显抑制作用,且可增加化疗药物的疗效。
文摘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.
文摘目的:探讨HPPH光动力治疗对鼠G422脑胶质瘤突变型p53蛋白和p16蛋白表达的影响并和HpD做比较。方法:建立鼠G422脑胶质瘤皮下移植瘤模型,设立空白对照组、单注射HPPH组(0.45mg/kg)、单665nm激光照射组、HPPH-PDT组(0.15mg/kg组、0.3mg/kg组、0.45mg/kg组)、HpD-PDT组(5mg/kg)。单注射HPPH组、HPPH-PDT组和HpD-PDT组自尾静脉推注入光敏剂,24h后以波长665nm的半导体激光照射HPPH-PDT组和单激光组肿瘤,功率密度200mW/cm^2,每光斑照射17min,能量密度为204J/cm^2;以波长630nm的半导体激光照射HpD-PDT组肿瘤,功率密度200mW/cm^2,每光斑照射20min,能量密度为240J/cm^2。于PDT后9d处死鼠行酶联免疫吸附法(ELISA)的双抗体夹心法检测HPPH-PDT和HpD-PDT后突变型p53蛋白(mutant type p53 protein,mtp53)和p16蛋白表达变化。结果:空白、单注药和单照光三组对照组之间mtp53蛋白和p16蛋白表达值两两比较,差异无统计学意义(P>0.05)。HPPH-PDT各剂量组与空白对照组比较,mtp53蛋白表达值明显降低,p16蛋白表达值明显升高,差异有统计学意义(P<0.01)。0.3mg/kg组和0.45mg/kg组与0.15mg/kg组相比,mtp53蛋白表达值降低,p16蛋白表达值升高,差异有统计学意义(P<0.05),0.45mg/kg组mtp53蛋白表达值稍低于0.3mg/kg组,p16蛋白表达值稍高于0.3mg/kg组,差异无统计学意义(P>0.05)。HPPH-PDT0.3mg/kg组和0.45mg/kg组的mtp53蛋白表达值低于HpD-PDT组,p16蛋白表达值高于HpD-PDT组,差异有统计学意义(P<0.05)。结论:HPPH-PDT0.3mg/kg是适宜的HPPH剂量。HPPH-PDT诱导mtp53蛋白表达降低,p16蛋白表达升高。与HpD-PDT相比,HPPH-PDTmtp53蛋白表达更低,p16蛋白表达更高。