人胃癌组织块裸鼠原位移植/转移模型的建立

 目的　用肿瘤组织块原位移植 ,建立人胃癌裸小鼠原位移植 /转移模型。方法　以人胃低分化腺癌细胞系接种于裸小鼠皮下 ,形成稳定传代的皮下移植瘤 ,再取该肿瘤组织块原位移植于裸鼠胃壁 ,观察移植肿瘤的生长状况、移植成功率和自发转移的发生率。结果　原位移植成功率 (成瘤率 )为 1 0 0 %、局部淋巴结转移率 1 0 0 %、远处淋巴结转移率 90 %、肝转移发生率为 75%。荷瘤鼠的中位生存期为 1 4周 ,晚期出现消瘦和全身衰竭。结论　该裸小鼠原位移植 /转移模型的生物学行为与人胃癌自然生长和转移过程相似 ,可作为一种有价值的工具用于胃癌转移机理和抗转移实验治疗的研究。     

建立裸小鼠癌原位移植模型的一种新方法

建立人胃癌裸小鼠原位移植模型，并对不同方法进行比较。方法：ＢＡＬＢ／Ｃｎｕ／ｎｕ裸小鼠１８只，随机分类一组，胃囊法组通过手术将ＳＧＣ－７９０１人胃癌组织块移植到裸小鼠胃壁缝粘膜小囊内；缝挂法组以缝挂方法作对比；第三组为对照组。待荷瘤鼠濒临死亡时进行解剖检查。结果：胃囊法组及缝挂法组原位成瘤率及局部浸润发生率均为１００％，胃囊法组肝脏转移率为６６．７％，显著Ｐ〈０．０１。高于挂法组（３３．３％），且     

裸鼠人胃腺癌SGC-7901原位移植模型的构建及其生物学特性

目的：建立裸鼠人胃癌原位移植模型。方法：以反复接种传代于裸鼠皮下的SGC-7901人胃癌细胞株建立的移植瘤组织块为材料，将其原位移植于裸鼠胃壁，观察移植肿瘤的生长情况、移植成功率和自发转移的发生率。结果：原位移植成功率及局部浸润率为8／8，局部淋巴结转移率为8／8，肺转移发生率为5／8，肝转移发生率为7／8，腹膜转移发生率为7／8。结论：裸鼠人胃癌原位移植模型的生物学行为与人胃癌自然生长和转移过程相似，可作为肿瘤转移机制及其抗转移治疗实验研究的理想模型。     

裸鼠人胃癌原位移植模型的建立

目的：建立裸鼠人胃癌原位移植模型。方法：将ＳＧＣ－７９０１人胃癌细胞株细胞接种至裸鼠皮下，建立皮下模型并反复传代，再以第八代移植瘤组织为材料，通过剖腹手术将其移植到裸鼠胃壁，待动物自然死亡后尸检。结果：该模型原位瘤沿胃壁呈浸润性生长，潜伏期为３￣４周，以后迅速增长并与腹膜粘连，约１２周以后逐渐消瘦，生存期为１６￣２４周，原位成瘤率及局部浸润率均为１００％，部分运动（２／６）出现肝脏转移。结论：裸鼠     

建立裸小鼠人胃癌原位移植模型的一种新方法

 建立人胃癌裸小鼠原位移植模型, 并对不同方法进行比较。 方法:BALB/Cnu/un裸小鼠18只, 随机分为三组, 胃囊法组通过手术将SGC－7901人胃癌组织块移植到裸小鼠胃壁缝制的粘膜小囊内; 缝挂法组以缝挂方法作对比; 第三组为对照组。 待荷瘤鼠濒临死亡时处死进行解剖检查。 结果:胃囊法组及缝挂法组原位成瘤率及局部浸润发生率均为100％，胃囊法组肝脏转移率为66.7％(4/6), 显著P<0.01高于挂法组(33.3％), 且幽门梗阻及癌性腹水发生率亦明显提高(分别为83.33％ vs 16．6％P<0.01; 66.7％vs16.6％, P<0.001)。 结论:胃囊法建立的模型能更好地再现人胃癌的生长特性。     

BNX小鼠人胃癌原位移植模型的建立及其生物学特性的观察

目的应用T、B、NK细胞联合免疫缺陷的BNX小鼠建立人胃癌原位移植高转移模型.方法将MKN-45细胞株接种至BNX小鼠皮下,成瘤后将肿瘤组织剪成小块通过手术移植至BNX小鼠的胃壁,观察肿瘤生长与转移情况,8周后对动物进行解剖.结果胃壁原位移植瘤浸润破坏胃壁各层组织结构,并直接扩散至周围脏器.肿瘤的移植成功率为100%(23/23),表现出很高的侵袭和转移特性:原位肿瘤平均体积2837.07±1044.04 mm3,局部和远处淋巴结转移率达83%(19/23),肝转移率为83%(19/23),肺转移率为65%(15/23),膈转移率为39%(9/23),发生腹腔种植与腹水的动物为35%(8/23),此外,还有个别脾转移.结论通过T、B、NK细胞联合免疫缺陷的BNX小鼠建立人胃癌原位移植模型可以更好地模拟人胃癌侵袭与转移本身的自然过程,对人胃癌防治及其转移机理的研究提供一个更为理想的模型.     

人类胃癌裸鼠淋巴结转移模型的建立

 目的　研究胃癌淋巴结转移动物模型的建立方法。方法　人类胃癌低分化细胞系SGC-7901体外培养、传代并扩增后，收集细胞行皮下种植成瘤，鼠间传代至第6代，以皮下肿瘤组织块原位种植于裸鼠胃壁建立动物模型。种植后第9周处死裸鼠，观察原位种植瘤生长、淋巴结转移及其他脏器转移情况，测定荷瘤裸鼠血清癌胚抗原（CEA）值。结果　原位移植瘤种植成功率100 ％，胃周淋巴结转移率93.3 ％，移植瘤可发生局部浸润及远处脏器转移，荷瘤裸鼠CEA值明显高于正常裸鼠（P＜0.01）。结论　应用SGC-7901细胞系可成功建立胃癌的淋巴结转移动物模型。     

人胃癌裸鼠原位移植瘤模型的建立及其活体荧光成像检测

目的:建立可动态实时监测的人胃癌裸鼠原位移植瘤模型.方法:将稳定表达荧光素酶的人胃癌细胞SGC-7901fLuc+注入裸鼠后肢根部皮下形成皮下移植瘤.待皮下移植瘤瘤块长至直径0.5 cm时,剥取肿瘤组织,应用叠合法将瘤块原位移植于裸鼠胃小弯处,形成原位移植瘤模型.利用小动物活体荧光成像系统,每4日监测移植瘤的进展情况.荷瘤3周后,解剖荧光成像阳性小鼠,利用H-E染色、光镜下观察移植瘤的形态.结果:应用小动物活体荧光成像系统,可在荷瘤裸鼠胃部检测到逐渐增强的荧光信号.荷瘤裸鼠胃部存在肿瘤包块贴附于胃壁,包块直径为0.5 ～1.0 cm,包块周围与相邻组织器官边界清晰,未见粘连,检查腹腔未见转移,未见腹水形成.应用叠合法构建人胃癌裸鼠原位移植瘤模型成功率为95％(19/20).对荷瘤胃组织H-E染色后,可见异常肿瘤细胞,肿瘤包膜完整,符合胃癌组织学特征.结论:成功建立了操作简便、成瘤率高的可动态监测的人胃癌裸鼠原位移植瘤模型,为研究胃癌发生机制、研发抗癌药物提供了理想的实验工具.     

人肝癌NOD-SCID小鼠原位移植模型的建立及其生物学特性的研究

目的：建立人肝癌NOD-SCID小鼠原位移植模型,并通过和裸小鼠原位移植模型生物学特性的比较,对两种不同类型免疫缺陷动物在人肝癌异种移植方面的应用价值进行初步探讨。方法：将组织学完整的SMMC-LTNM瘤块植入NOD- SCID小鼠和裸小鼠肝脏内,观察成瘤率、肿瘤体积和重量、脏器的转移情况以及血清甲胎蛋白(AFP)、γ-谷氨酰转肽酶同工酶Ⅱ(γ-GTⅡ)等。结果：NOD-SCID小鼠于移植后5周可扪及肿瘤的生长,成瘤率为100%,11周肿瘤体积为(4．48±0．93) cm~3,瘤重为(7．02±1．15)g,肺部转移率为53．85%；裸小鼠于移植后6～7周可扪及肿瘤的生长,成瘤率为100%,11周肿瘤体积为(1．02±0．70)cm~3,瘤重为(2．87±0．44)g,体内未见转移发生。NOD-SCID小鼠的瘤体积、瘤重、肺转移率均高于裸小鼠(P＜0．01)。两者均保持AFP高分泌和γ-GTⅡ同工酶阳性的特性。结论：建立了一个与临床相似的人肝癌动物模型,与裸小鼠相比,NOD-SCID小鼠在建立人肝癌异种移植模型方面有更大的应用价值。     

裸小鼠移植瘤的转移研究

Rygaad和Povlsen 1969年首次将人结肠癌在裸小鼠移植成功,迄今大多数人恶性肿瘤均可在裸小鼠移植。大量研究表明裸小鼠人癌移植瘤是目前人体外最接近人类肿瘤的整体实验模型。但人癌裸小鼠移植后,能否保持其原浸润转移的恶性生物学行为,研究结果意见不一。利用人癌裸小鼠移植瘤模型研究人类肿瘤     

采用OB胶粘贴法建立人胃癌裸鼠原位种植转移模型

背景与目的建立理想的动物肿瘤移植模型是进行肿瘤防治研究的重要前提,目前公认的胃癌造模的方法为采用完整组织块的“皮下移植法”、“胃囊法”,但传统的造模方法目前尚存在操作复杂、成活率低等缺点,本研究拟采用“OB胶粘贴法”更简便地建立人胃癌裸鼠原位移植模型。方法以反复接种传代于裸鼠皮下的SGC鄄7901人胃癌细胞株建立的移植瘤组织块为材料,将其用生物吻合“OB胶”原位粘贴于裸鼠胃壁,并与传统“胃囊法”、“皮下移植法”比较观察移植肿瘤的生长情况、移植成功率和自发转移的发生率。结果“OB胶粘贴法”组原位移植成功率为100%,局部淋巴结转移率为100%,肺转移发生率为62.5%,肝转移发生率为87.5%,腹膜转移发生率为87.5%,较之胃囊法(分别为100%、100%、50.0%、50.0%和33.3%),除腹膜转移率升高外,远处脏器转移差异无显著性,但成活率高。皮下移植组未发生局部浸润及远处转移。结论“OB胶粘贴法"能更简便地建立人胃癌高转移模型,重现临床转移过程。     

An orthotopic mouse model of remetastasis of human colon cancer liver metastasis.

Whether liver metastases from colon cancer are capable of metastasizing to other sites is an important question in surgical oncology. To answer this question, we have developed a highly metastatic orthotopic transplant model of a liver metastasis from a human colon cancer patient in nude mice that targets the liver and lymph nodes. The metastatic human tumor was transplanted in athymic nude mice by surgical orthotopic implantation (SOI) of a liver metastasis from a colon cancer patient. The human colon tumor was then subsequently implanted in the colon by SOI or, in an additional series of nude mice, in the liver by surgical hepatic implantation (SHI). The mice were then explored over time for lymph node involvement beginning 10 days after implantation. After SOI, 100% of the animals had liver metastasis within 10 days, and subsequently, 19 days after SOI, all lymph nodes draining the liver were involved with metastasis without any retroperitoneal or lung tissue involvement. After SHI, all sites of lymphatic drainage of the liver, including portal, celiac, and mediastinal lymph nodes, were massively involved by metastasis in 100% of the animals as early as 10 days after tumor implantation on the liver. The results of this study demonstrate that liver metastases from colon cancer are capable of remetastasizing to other sites. This study thus suggests that in colon cancer patients with liver metastasis, mediastinal, celiac, and portal lymph node metastases originate from the liver metastasis and not, as previously thought, from primary colon cancer.     

Metastatic characteristics of SY86B human gastric carcinoma in athymic nude mice

The invasive and metastatic behavior of SY86B human gastric carcinoma in nude mice were further studied. The results showed that this human cancer strain had a relatively high spontaneous metastatic rate (68.4%). The metastasis was related to the invasiveness of the transplanted tumor and tumor-bearing time. Since the metastasis developed from 2nd to 9th passages, it was considered that this model had a stable metastatic tendency. It was observed that the genetic background, age and sex difference of the recipient nude mice may not be associated with the metastasis. Aside from the high transplantable rate (100%) and spontaneous metastatic rate (68.4%), SY86B human gastric carcinoma strain still maintains the morphologic, immunologic, genetic and ultrastructural characteristics of the original tumor. All these make it a useful means in the study of diagnosis and treatment of cancer metastasis.     

Invasion and Metastasis of SY86B Human Gastric Carcinoma Cells in Nude Mice

A moderately differentiated tubular adenocarcinoma of human stomach, named SY86B, was successfully transplanted subcutaneously to nude mice of different genetic backgrounds (BALB/CA/PBI- nu , C57BL/6J.615/PBI- nu and ICR-BALB/CA/PBI- nu ). The tumor has been passaged for 13 generations and the transplantability was 100%. The SY86B cells retained the capacity of invasive and metastatic growth in the nude mice and showed a high rate of metastasis to the regional lymph nodes and to such distant organs as the lungs, liver and pancreas. The overall rate of metastasis was 77.7%. The species of the nude mice, their age and sex apparently did not significantly affect the occurrence of metastasis. Tumor-bearing time and the aggressive character of the tumor cells themselves appeared important for the genesis of metastasis. This experimental model can provide a new approach to basic and clinical studies of cancer metastasis.     

Invasion and metastasis of SY86B human gastric carcinoma cells in nude mice

A moderately differentiated tubular adenocarcinoma of human stomach, named SY86B, was successfully transplanted subcutaneously to nude mice of different genetic backgrounds (BALB/CA/PBI-nu, C57BL/6J.615/PBI-nu and ICR.BALB/CA/PBI-nu). The tumor has been passaged for 13 generations and the transplantability was 100%. The SY86B cells retained the capacity of invasive and metastatic growth in the nude mice and showed a high rate of metastasis to the regional lymph nodes and to such distant organs as the lungs, liver and pancreas. The overall rate of metastasis was 77.7%. The species of the nude mice, their age and sex apparently did not significantly affect the occurrence of metastasis. Tumor-bearing time and the aggressive character of the tumor cells themselves appeared important for the genesis of metastasis. This experimental model can provide a new approach to basic and clinical studies of cancer metastasis.     

Manifestation of Metastatic Potential in Human Gastric Cancer Implanted into the Stomach Wall of Nude Mice

The biological properties of human gastric cancer cell line G/F implanted into either the subcutis or the stomach wall of nude mice were compared. The G/F tumor in the stomach wall showed a slower growth rate than that in the subcutis. The level of carcinoembryonic antigen in serum was greater when the tumor was in the stomach wall than when it was in the subcutis. The tumor in the stomach wall invaded the surrounding tissues and metastasized to the regional lymph nodes and distant organs such as the lung and the liver in 27 of the 43 mice (68%). In contrast, the tumor in the subcutis was highly encapsulated and metastasis to other organs was not observed. These findings indicate that the stomach wall might provide a suitable microenvironment for G/F gastric cancer to exert its intrinsic properties. Therefore, implantation of human gastric cancer into the stomach wall of nude mice may provide a useful model to study the intrinsic characteristics of human cancer as well as the effectiveness of experimental chemotherapy.     

Manifestation of metastatic potential in human gastric cancer implanted into the stomach wall of nude mice

The biological properties of human gastric cancer cell line G/F implanted into either the subcutis or the stomach wall of nude mice were compared. The G/F tumor in the stomach wall showed a slower growth rate than that in the subcutis. The level of carcinoembryonic antigen in serum was greater when the tumor was in the stomach wall than when it was in the subcutis. The tumor in the stomach wall invaded the surrounding tissues and metastasized to the regional lymph nodes and distant organs such as the lung and the liver in 27 of the 43 mice (68%). In contrast, the tumor in the subcutis was highly encapsulated and metastasis to other organs was not observed. These findings indicate that the stomach wall might provide a suitable microenvironment for G/F gastric cancer to exert its intrinsic properties. Therefore, implantation of human gastric cancer into the stomach wall of nude mice may provide a useful model to study the intrinsic characteristics of human cancer as well as the effectiveness of experimental chemotherapy.     

三氧化二砷抑制人结肠癌裸鼠肝转移的药效 动力学

 目的　研究三氧化二砷(As2O3 ) 对人结肠癌裸鼠肝转移的抑制作用。方法　BALB/ C2nu/ nu 裸 鼠经脾脏接种人结肠腺癌LS2174 T 细胞建立结肠癌裸鼠肝转移模型,于10 min (早期) 、10 天(中期) 、20 天(晚期) 经尾静脉注射As2O3 ,对照组注射生理盐水。观察各组裸鼠体重变化、肝转移结节的数目、大 小、瘤重以及肝脏肿瘤替代率和荷瘤鼠的生存时间。结果　与对照组相比,早期及中期治疗组裸鼠肝转 移结节的数目、大小、瘤重以及肝脏肿瘤替代率和荷瘤鼠的生存时间差异均有统计学意义( P < 0. 05) ,晚 期治疗组差异无统计学意义( P > 0. 05) 。结论　三氧化二砷对人结肠癌裸鼠肝转移有明显的抑制作用, 早期效果优于中晚期。