槲皮素联合苏拉明对肺腺癌小鼠移植瘤HIF-1α和P-选择素表达的影响

目的研究槲皮素联合苏拉明对小鼠肺腺癌移植瘤内缺氧诱导因子-1α(hypoxiainduciblefactor-1α,HIF-1α)和P-选择素(P-Selectin)表达的影响,及其抑制肿瘤生长和转移的作用机制。方法复制肺腺癌LA795细胞的T739小鼠移植瘤模型,将40只小鼠按随机数字表法分成对照组(A)、顺铂组(B)、槲皮素组(C)、苏拉明组(D)和槲皮素 苏拉明组(E)。实验3周后,处死全部小鼠,计算抑瘤率和肺转移发生率,计数各组小鼠肺表面转移结节数及肺表面结节转移抑制率。免疫组化和图象分析系统检测皮下移植瘤中HIF-1α和P-选择素表达并定量分析。结果B、C、D和E组肿瘤抑制率分别为23·03%、39·77%、34·40%和54·7%,A、B、C、D和E组肺表面转移结节数分别为11·00±1·927、8·75±1·642、6·00±1·600、3·00±2·000和1·37±1·187,HIF-1α灰度值分别为85·1±3·72、86·9±4·31、96·1±4·78、97·9±5·02和111·9±5·48,P-选择素灰度值分别为77·20±4·37、80·20±4·74、96·10±5·23、111·90±5·04和127·40±5·96。D组中肺表面转移结节数、皮下肿瘤内HIF-1α和P-选择素表达与A组相比明显下降,相反B组对此则无明显影响,E组则显著抑制肿瘤的生长和肺表面转移结节数,且具有协同作用。结论槲皮素和苏拉明对LA795肺腺癌移植瘤的生长和肺结节转移具有协同抑制作用,其机制与其抑制肿瘤内HIF-1α和P-选择素表达相关。     

苏拉明联合槲皮素抑制肺腺癌小鼠移植瘤的转移

 目的研究苏拉明联合槲皮素对小鼠肺腺癌转移的抑制作用。方法将40只接种高转移性的LA795肺腺癌细胞T739小鼠随机分成5组:对照组、顺铂(DDP)组、槲皮素组、苏拉明组、苏拉明+槲皮素组。实验3周后,处死全部小鼠,取出双肺和剥离皮下肿瘤,计算肺转移发生率,计数各组小鼠肺表面转移结节数及算出肺表面结节转移抑制率,测量各组小鼠肺湿重。免疫组化和图像分析系统检测皮下移植瘤中微血管密度(microvessel density,MVD),血管内皮生长因子(vascular endothelial growth fac-tor,VEGF)的表达并定量分析。结果苏拉明组、槲皮素组与对照组相比肺表面转移结节数明显下降,同时苏拉明组中肺转移发生率、皮下肿瘤内MVD、VEGF的表达与对照组相比也明显下降,相反顺铂组对此则无明显影响。联合用药组则显著抑制肺表面转移结节数且具有协同作用。结论苏拉明和槲皮素对LA795肺腺癌的肺结节转移具有协同抑制作用,苏拉明抑制LA795肺腺癌转移与其抑制其肿瘤内VEGF表达相关。     

苏拉明联合顺铂对肺腺癌小鼠移植瘤生长和转移的影响

背景与目的:新近研究发现新生血管生成在肿瘤生长、转移以及转移灶的生长过程中起重要作用。本研究观察苏拉明联合顺铂对肺腺癌细胞LA795的T739小鼠异体移植瘤生长和转移的抑制作用,并初步探讨其作用机制。方法:建立肺腺癌细胞LA795的T739小鼠异体移植瘤模型,将32只接种LA795细胞T739小鼠随机分成4组,每组8只。对照组:每只小鼠每天生理盐水0.2ml腹腔注射;顺铂组:顺铂2mg·(kg·d)-1于接种后第4、11、18天各一次;苏拉明组:苏拉明10mg·(kg·d)-1;顺铂 苏拉明组:顺铂2mg·(kg·d)-1于接种后第4、11、18天各腹腔注射一次 苏拉明10mg·(kg·d)-1。用药16日,用药中观察肿瘤生长情况,于接种后第24天处死各组小鼠,取出双肺并剥离皮下肿瘤,计算出肺转移发生率,计数各组小鼠肺表面转移结节数并算出肺表面结节转移抑制率。收集移植瘤标本行光镜观察,采用免疫组化和图像分析系统定量检测肿瘤组织微血管密度(microvesseldensity,MVD),血管内皮生长因子(vascularendothelialgrowthfactor,VEGF)及核因子-κB(nuclearfactor-kappaB,NF-κB)的表达和原位凋亡TUNEL法检测肿瘤细胞凋亡指数。结果:顺铂组、苏拉明组、顺铂加苏拉明组肿瘤的生长明显受到抑制,瘤重明显低于对照组,其抑瘤率分别为23.0%、34.4%、56.3%,而联合用药组抗瘤作用进一步增强。光镜观察顺铂组、苏拉明组、顺铂加苏拉明组肿瘤细胞出现坏死,苏拉明组和顺铂加苏拉明组肿瘤间质中血管数减少。各用药组NF-#B的表达都比对照组减少,凋亡指数比对照组明显提高,差异有显著性(P<0.01);苏拉明组及联合组与对照组和顺铂组相比肺表面转移结节数明显下降,同时肺转移发生率、皮下肿瘤MVD、VEGF的表达也明显下降,相反顺铂组对此则无明显改变。结论:苏拉明可明显抑制肺腺癌细胞在小鼠体内的生长和转移,与顺铂联用有协同作用,其作用机制可能与抑制其微血管形成、促进细胞凋亡有关。     

苏拉明对肺腺癌小鼠移植瘤生长的影响及其机制

背景与目的:有研究表明,苏拉明对恶性肿瘤有明显抑制作用,但有关其对肺腺癌体内抗瘤作用的报道很少。本实验观察苏拉明对肺腺癌LA795细胞的T739小鼠移植瘤生长和转移的抑制作用,并探讨其作用机制。方法:将32只接种LA795肺腺癌细胞T739的小鼠随机分成4组:对照组、顺铂组、苏拉明组、联合组(苏拉明加顺铂组),每组8只。用药16d,观察肿瘤生长情况,于接种后24d处死各组小鼠,取出双肺并剥离皮下肿瘤,计算出肺转移发生率,计数各组小鼠肺表面转移结节数并算出肺表面结节转移抑制率;收集移植瘤标本,称重和测量体积,免疫组化和图像分析系统定量检测肿瘤组织中表皮生长因子受体(epidermal growth factor receptor,EGFR)、P-选择素和增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)的表达。结果:顺铂组、苏拉明组、联合组肿瘤的生长明显受到抑制,瘤重明显低于对照组,其抑瘤率分别为34.9%、23.8%、57.3%;苏拉明组及联合组与对照组和顺铂组相比肺转移发生率、肺表面转移结节数明显下降(P<0.05),而顺铂组与对照组比较差异则无统计学意义。EGFR和P-选择素的表达对照组高于顺铂组、苏拉明组、联合组,对照组、顺铂组、苏拉明组、联合组EGFR表达的灰度值分别为157.7±6.1、130.7±5.9、110.3±5.8、89.2±5.4,P-选择素表达的灰度值分别为134.5±5.7、117.9±5.1、96.2±5.4、78.3±4.5,各用药组与对照组相比差异均有统计学意义(P<0.05或P<0.01);对照组、顺铂组、苏拉明组、联合组增殖指数(S phase fraction,SPF)分别为(89.7±3.8)%、(68.8±4.0)%、(65.2±4.2)%、(51.3±4.2)%,各用药组SPF都比对照组低,差异有统计学意义(P<0.01)。结论:苏拉明可明显抑制肺腺癌细胞在小鼠体内的生长和转移,其作用机制可能为通过调控肿瘤细胞中的EGFR和P-选择素表达,从而抑制肿瘤细胞增殖和减少肿瘤细胞的粘附而防止转移。     

JCS对LA795肺腺癌小鼠移植瘤转移的抑制作用研究

目的对金刺参九正合剂（JCS）防治肺癌转移的能力及机制进行探讨。方法JCS/顺铂（DDP）作用于荷LA795高转移肺腺癌小鼠模型,观察药物对荷瘤小鼠抑瘤率、肺转移抑制率的影响,并应用免疫组化方法观察药物对实验小鼠皮下移植瘤体血管内皮生长因子（VEGF）、血管内皮细胞因子（CD34）、移植瘤黏附因子（CD44V6）、基质金属蛋白酶2（MMP2）、基质金属蛋白酶抑制酶（TIMP2）的表达及移植瘤微血管密度（MVD）变化的影响。结果JCS组/DDP＋JCS组瘤重抑制率、肺转移抑制率分别为18.2%、42.4%和60.6%、64.4%;MVD、VEGF、CD44V6、MMP2表达均明显低于其它组,TIMP2表达明显高于其它组（P〈0.01）。结论JCS对LA795高转移肺腺癌小鼠模型有较好抑制肿瘤生长、抑制转移的作用,其抑制基质降解及肿瘤血管生成,调节肿瘤转移相关黏附分子的表达可能是JCS抑制肿瘤转移的机制之一。     

肺一丸对小鼠移植瘤VEGF的表达及肺转移相关性研究

目的 :探讨血管生成因子的表达对荷瘤小鼠肿瘤生长及肺转移的影响 ,以及肺一丸对其干预作用。方法 :采用LA795肺腺癌皮下接种T73 9小鼠模型。灌胃及腹腔给药法 ,观察中药肺一丸对肿瘤血管生成、VEGF的表达及肺转移的抑制作用。结果 :肺一丸能够抑制荷瘤小鼠肿瘤生长 ,高剂量抑瘤率为 49 6% ;降低血管密度 ,肺转移抑制率为 47 62 %。结论 :肺一丸能够通过调控肿瘤VEGF的表达 ,抑制肿瘤血管生成 ,起到抑制肿瘤生长和抗转移作用。     

肺一丸对小鼠移植瘤VEGF的表达及肺转移相关性研究

目的：探讨血管生成因子的表达对荷瘤小鼠肿瘤生长及肺转移的影响．以及肺一丸对其干预作用。方法：采用LA795肺腺癌皮下接种T739小鼠模型。灌胃及腹腔给药法，观察中药肺一丸对肿瘤血管生成、VEGF的表达及肺转移的抑制作用。结果：肺一丸能够抑制荷瘤小鼠肿瘤生长，高剂量抑瘤率为49．6％；降低血管密度，肺转移抑制率为47．62％。结论：肺一丸能够通过调控肿瘤VEGF的表达．抑制肿瘤血管生成．起到抑制肿瘤生长和抗转移作用。     

TNP-470联合重组人内皮抑素抑制小鼠肺腺癌生长的研究

目的:观察TNP470和重组人内皮抑素（recombinant human endostatin,rhES）联合治疗对小鼠肺腺癌LA795肿瘤生长的抑制作用。方法: 用甲醇诱导能高效分泌表达重组人内皮抑素（rhES）的毕赤酵母菌株分泌表达rhES，将皮下接种LA795肺腺癌细胞的T739雄性近交系小鼠随机分成3组，每组各10只，分别给予PBS，rhES及TNP470+rhES皮下注射，每日1次，连续14 d；观察各组小鼠肿瘤生长情况，游标卡尺测量肿瘤体积大小。断颈处死小鼠，原位肿瘤免疫组化观察肿瘤内部微血管密度（microvessel density, MVD）。结果: 经甲醇诱导，毕赤酵母重组菌分泌表达rhES，并应用肝素亲和层析将其纯化；动物试验显示与PBS对照组比较，rhES治疗组及rhES＋TNP470治疗组均明显抑制小鼠肿瘤的生长（P<0.01），TNP470+rhES组与rhES组比较亦有显著性差异（P<0.01）。原位肿瘤免疫组化显示联合治疗组抑制血管生成更显著（P<0.01）。结论: TNP470联合rhES治疗对小鼠肺腺癌LA795生长的抑制效果比单独使用rhES的治疗效果更佳，具有良好的协同治疗作用     

bFGF单克隆抗体抑制小鼠Lewis肺癌转移及血管新生

背景与目的:碱性成纤维细胞生长因子(basic fibroblast growth factor,bFGF)是一种具有广泛生物学功能的细胞因子,在肺癌等多种肿瘤组织高表达,并参与其发生、发展进程.本研究旨在探讨bFGF单克隆抗体对C57 BL/6小鼠Lewis肺癌移植瘤生长、转移及血管新生的抑制作用.方法:采用皮下接种肿瘤细胞的方法,建立Lewis肺癌自发转移小鼠模型,随机分为PBS组、bFGF单克隆抗体MabF7治疗组,以及正常小鼠IgG阴性对照组,每组8只.自接种第9天开始给药,每3天1次,连续6次.同时观察Lewis肺癌小鼠健康状况,游标卡尺测量皮下移植瘤体积,给药6次后处死小鼠,称瘤质量,取肺组织计数各组小鼠肺表面转移瘤结节数,并用免疫组化法检测CD31的表达,以计算肿瘤组织微血管密度(microvessel density,MVD).结果:MabF7治疗组小鼠肿瘤体积与PBS组相比生长缓慢,小鼠瘤质量为(2.6±1.0)g,较PBS组的(5.1±1.3)g显著降低(P＜0.05);MabF7组小鼠肺表面转移瘤结节数为(3.0±2.1)个,显著低于PBS组的(12.3±2.4)个(P＜0.05).另外MabF7组可显著抑制肿瘤组织MVD表达水平.结论:bFGF单抗可明显抑制C57 BL/6小鼠Lewis肺癌生长及转移,其作用与抑制肿瘤增殖及微血管生成相关.     

人参皂苷Rg3对小鼠Lewis肺癌生长和转移的抑制作用及其与肿瘤相关巨噬细胞的关系

目的研究人参皂苷Rg3(ginsenoside Rg3,Rg3)对肺腺癌小鼠异体移植瘤生长和转移的抑制作用及其相关机制。方法构建高转移肺腺癌小鼠移植瘤模型,将24只接种高转移性Lewis肺癌的C57BL/6J小鼠随机分成3组：对照组、顺铂(Cisplatin,DDP)组和Rg3组。给予相应药物干预,于接种后24日处死各组小鼠,剥离皮下肿瘤,取出双肺,计算肺转移发生情况,免疫组织化学检测皮下移植瘤中肿瘤相关巨噬细胞（tumor-associated macrophages,TAMs）和微血管密度（microvessel density,MVD）的表达并定量分析。结果DDP组、Rg3组抑瘤率分别为39.20%、54.86%,与对照组比较,瘤重差异有统计学意义（P<0.01）,肺表面结节转移抑制率分别为30.25%,58.57%,与对照组比较差异有统计学意义（P<0.01）,对照组、DDP组和Rg3组TAMs分别为(47.21±12.06)、(45.67±11.90)、(16.11±6.32),MVD分别为(24.57±4.59)、(23.52±4.74)、(14.17±2.43)。结论Rg3对肺腺癌移植瘤的生长和转移具有抑制作用,其机制可能与其抑制肿瘤内TAMs在肿瘤基质中浸润及抑制微血管生成有关。     

Contribution of angiogenesis to the progression of colon cancer: possible inhibitory effect of angiogenesis inhibitor TNP-470 on tumor growth and hepatic metastasis

The contribution of angiogenesis to tumor growth and hepatic metastasis of colorectal cancer was investigated by means of immunohistochemical study and in vitro and in vivo experiments. Colorectal cancer specimens from 30 patients with hepatic metastasis and 39 patients without hepatic metastasis were studied by staining with antibodies against factor VIII-related antigen. Microvessel count in patients with liver metastasis was significantly higher than in those without liver metastasis (p<0.005). The effect of TNP-470 was evaluated with in vitro and in vivo experiments using human colon cancer cell line, LM and the highly hepatic metastasis cell line, LM-H5. The effect of TNP-470 on the proliferation of the cancer cells and human umbilical vein endothelial cells (HUVECs) was examined. TNP-470 inhibited more sensitively the proliferation of HUVECs than cancer cells in vitro. IC50 was approximately 3 pg/ml in HUVECs and approximately 2 microg/ml in cancer cells. The effect of TNP-470 on the growth of xenografts and liver metastases by LM-H5 in nude mice was examined. TNP-470 (30 mg/kg) was administered by subcutaneous injection every third day for 4 weeks. TNP-470 inhibited both the growth of xenograft and the hepatic metastasis. The number of metastatic foci in the liver was 78.2+/-30.1 in the control group and 20.6+/-16.5 in the treated group. These results suggest that TNP-470 is a potent agent to inhibit tumor growth and hepatic metastasis of colon cancer.     

Antitumor effect of the angiogenesis inhibitor TNP-470 on human digestive organ malignancy

The antitumor and antimetastatic effects of TNP-470, an angiogenesis inhibitor, on human gastrointestinal tumors xenotransplanted into nude mice were investigated. When two gastric cancer (MT-2 and MT-5) and two colon cancer (TK-4 and TK-13) xenografts are transplanted orthotopically into nude mice, liver metastasis develops 6 weeks after transplantation. TNP-470 30 mg/kg had a significant inhibitory effect on primary tumor growth of gastric cancers when given on alternate days from 7 days after transplantation. However, when given from 10 days or 14 days after transplantation, no inhibitory effect on the growth of any tumor xenograft was observed. In contrast, liver metastasis of each xenograft type was inhibited significantly by TNP-470. The effect of TNP-470 on prognosis was investigated using a hepatic metastatic model of rat hepatoma. Although all untreated rats that received AH-130 cell implants died within one month of massive hepatic metastasis, >50% of rats treated with TNP-470 survived for 4 months. The number of apoptotic cells in hepatic metastatic foci was significantly increased by TNP-470 administration. These results suggest that TNP-470 may provide a new approach to the treatment of digestive organ malignancies.     

血管生成抑制剂TNP—470抑制Lewis肺癌生长和转移的实验研究

目的采用Ｌｅｗｉｓ肺癌来验证血管生成抑制剂ＴＮＰ－４７０对肿瘤生长和转移的抑制作用。方法将Ｌｅｗｉｓ肺癌细胞接种于Ｃ５７ＢＬ小鼠皮下（２．４×１０６／鼠）。将２０只小鼠随机分成对照组和治疗组,自第２天起分别给予溶剂（３％酒精）０．２ｍｌ和ＴＮＰ－４７０（４０ｍｇ／ｋｇ）,隔天给药１次,共８次。第２２天时,测定对照组和治疗组的皮下瘤重及肺转移率,分别进行ｔ检验和χ２检验。结果两组皮下瘤重分别为３．７７±１．０５ｇ和１．９８±０．９６ｇ（Ｐ＝０．０００９）;两组肺转移率分别为８０％和３０％（Ｐ＝０．０３）。结论血管生成抑制剂ＴＮＰ－４７０能明显抑制Ｌｅｗｉｓ肺癌的生长和转移。     

TNP-470联合5-FU抑制结肠癌肝转移的研究

目的:研究血管生成抑制剂TNP-470联合5-FU对结肠癌肝转移的抑制作用。方法:将结肠癌LOVO细胞注入裸鼠脾脏,建立结肠癌肝转移模型。将裸鼠随机分为联合治疗组、TNP-470组、5-FU组和对照组4组。治疗4周后,处死裸鼠,计数肝转移率和肝转移结节数。采用免疫组化SABC法和图像分析系统对肝转移肿瘤组织的微血管密度(MVD)和血管内皮生长因子(VEGF)的表达进行定量分析。结果:TNP-470 5-FU组和TNP-470组与对照组比较,肝转移率显著下降(P<0.01,P<0.01);TNP-470 5-FU组和5-FU组与对照组相比,VEGF表达量明显下降(P相似文献   

Inhibition of Liver Metastasis of Human Pancreatic Carcinoma by Angiogenesis Inhibitor TNP-470 in Combination with Cisplatin

The anti-tumor and anti-metastatic effects of O-(chloroacetyl-carbamoyl) fumagillol (TNP-470), an angiogenesis inhibitor, and cisplatin (CDDP), an anti-neoplastic agent, were investigated using our established liver-metastasizing pancreatic carcinoma line, HPC-3H4. HPC-3H4 was injected into the spleens of nude mice. Mice were randomly divided into 5 groups; a control group given saline solution, a group receiving 45 mg/kg TNP-470, a group receiving 90 mg/kg TNP-470, a group receiving 90 mg/kg TNP-470 in combination with 0.25 mg/kg CDDP, and a group receiving 0.25 mg/kg CDDP. In the control group, liver metastasis developed in 14 of 15 mice (93.3%). Liver metastasis developed in 9 of 11 mice (81.8%) receiving 0.25 mg/kg CDDP. It developed in 11 of 15 mice (73.3%) receiving 45 mg/kg TNP-470, in 17 of 18 mice (94.4%) receiving 90 mg/kg TNP-470, and in 4 of 10 mice (40%) receiving 90 mg/kg TNP-470 in combination with 0.25 mg/kg CDDP. TNP-470 in combination with CDDP displayed a significant inhibitory effect on liver metastasis compared to the control. Although TNP-470 alone and CDDP alone had no effect on the tumor growth in vivo , 90 mg/kg TNP-470 in combination with 0.25 mg/kg CDDP had a significant effect. In vitro examinations demonstrated that the growth of HPC-3H4 cells was only mildly inhibited by TNP-470, but the production of vascular endothelial growth factor (VEGF) by HPC-3H4 was clearly inhibited by TNP-470. The inhibitory effect on the production of VEGF was not strong with CDDP treatment. These results indicate that the angiogenesis inhibitor TNP-470 in combination with low-dose CDDP has inhibitory activity against liver metastasis of human pancreatic carcinoma.     

Suppression of pulmonary metastasis by angiogenesis inhibitor TNP-470 in murine osteosarcoma

We treated a murine osteosarcoma cell line, LM8, which preferentially metastasizes to the lungs, with a new angiogenesis inhibitor, TNP-470, to evaluate the efficacy of this compound in the suppression of pulmonary metastasis of osteosarcoma. In an in vivo experiment, tumor cells were inoculated i.v. into C3H mice, and TNP-470 or vehicle alone (control group) was administered s.c. every day for 3 weeks. In the TNP-470-treated groups, both the number of pulmonary metastatic nodules and the lung wet weight were significantly reduced in a dose-dependent manner. Similarly, vascular density in the metastatic tumors estimated by immunohistochemical staining with anti-von-Willebrand factor antibody as an endothelial marker were significantly reduced. No severe side-effects were found. In an in vitro experiment, viable tumor cells were counted after 3 days' treatment with TNP-470. The 50% inhibitory concentration was 0.6 ng/ml for LM8, which was more sensitive than other tumor cells previously reported. Our results show that TNP-470 suppresses the pulmonary metastasis of LM8 and suggest that both its anti-angiogenic activity and cytostatic activity towards LM8 are responsible for the anti-tumor effect. © 1995 Wiley-Liss, Inc.