白细胞介素2质粒复合物治疗后小鼠肝癌的组织学变化

目的 探讨瘤体内直接注射白细胞介素2质粒／阳离子脂质体复合物治疗小鼠肝癌的效果和机制。方法 将小鼠白介素2表达质粒（VR1110）与阳离子脂质体（Transfectam)按适当比例混合而形成复合物（VR1110／Transfectam)。通过瘤体内接注射此复合物治疗小鼠肝癌模型,观察治疗后肿瘤积变化、组织学变化及表达情况。结果 瘤体内注射VR1110／Transfectam后,可在肿瘤组织中检测到小鼠IL－2mRNA的表达。VR1110／与Tansfectam治疗组肿瘤生长较其它对照组明显减慢,第1次治疗后第12天肿瘤体积明显小于其它组（P＜0．05）。治疗组小鼠均可见肿瘤组织大量坏死,炎性细胞浸润,及CD4^ 、CD8 淋巴细胞。结论 瘤体内直接注射VR1110／Transfectam复合物对小鼠肝癌的治疗作用明显,增强了小鼠机体对肝癌细胞的免疫学反应。     

阳离子脂质体介导的小鼠白细胞介素2基因修饰肝癌细胞瘤苗

目的 研究阳离了脂质体介导的小鼠白细胞介素2基因修饰肝癌细胞瘤苗的抗肿瘤作用。方法 利用阳离子脂质体Transfectam,将携带小鼠白细胞介素2（IL－2）基因的真核表达南粒VR1110,导入小鼠肝癌细胞H22;采用酶联免疫吸附测定法（ELISA）检测转染后经放射线照射、末经放射线照射和冻融后的细胞培养上清液中白细胞介素2的浓度;并研究转染后经放射线照射而制成的瘤苗的抗肿瘤效应。结果 转染后经放射线照射和末经放射线照射的H22细胞均持续分泌IL－2达30天以上;转染细胞在冻融后也能分泌IL－2;制备的瘤苗对小鼠肝癌模型肿瘤的生长有明显的抑制作用,并能明显提高荷瘤小鼠的生存率。结论 阳离了脂质体介导的小鼠细胞介素2基因转染后,能在肝癌细胞中有效表达,所制备的瘤苗可诱导有效的抗肿瘤效应。     

表达白细胞介素-12质粒DNA抗小鼠肝癌皮下移植瘤的作用

目的 探讨瘤内注射mIL-12质粒DNA抗小鼠肝癌皮下移植瘤的作用。方法：构建真核表达质粒载体pDC511mIL-12，ELISA方法检测质粒载体在真核细胞中的表达，淋巴母细胞增殖法检测mIL-12的生物学活性；分别于小鼠肝癌H22皮下移植瘤内直接注射质粒DNA，观察各组小鼠存活时间、肿瘤体积变化及各组小鼠脾脏细胞毒T淋巴细胞(CTL)的活性：注射质粒DNA后1月进行瘤体组织病理学观察：结果：mIL-12基因治疗组与空载体对照组相比，肿瘤生长显著受抑制(F=4．10，P=0．03)，小鼠存活期显著延长(X^2=4．48，P=0．03)．并且小鼠脾细胞CTL杀伤活性增强。质粒DNA瘤内注射1月后，pDC511mIL-12组肿瘤病灶炎性细胞浸润明显，病灶内肿瘤细胞广泛坏死。结论：瘤内注射mIL-12表达质粒DNA可抑制小鼠肝癌皮下移植瘤生长，能提高机体抗肿瘤免疫应答。     

阳离子脂质体——病毒增强质粒复合物在肝细胞癌基因治疗中的应用

目的建立一种简便有效的非病毒基因治疗方法。方法用构建的含人ＩＬ┐２基因的腺相关病毒（ＡＡＶ）增强质粒（ｐＡＩ┐ｈＩＬ┐２）与新型阳离子脂质体（Ｄｏｓｐｅｒ）以适当比例混合形成复合物（Ｄｏｓｐｅｒ┐ｐＡＩ┐ｈＩＬ┐２）。体外转染小鼠肝癌细胞系ＭＭ４５Ｔ．Ｌｉ┐２，评估了人ＩＬ┐２基因表达情况。应用直接瘤体内注射方法评估了此方法介导ＩＬ┐２基因的抗肿瘤作用。结果应用Ｄｏｓｐｅｒ┐ｐＡＩ┐ｈＩＬ┐２复合物体外转染ＭＭ４５Ｔ·Ｌｉ，其ＩＬ┐２表达水平每毫升可达１７５Ｕ／４８小时，最高表达时间在转染后第４天（２２５Ｕ／ｍｌ），第１２天仍可表达３０Ｕ／ｍｌ。瘤体内直接注射Ｄｏｓｐｅｒ┐ｐＡＩ┐ｈＩＬ┐２复合物后，瘤组织内可检出ＩＬ┐２ｍＲＮＡ，治疗组肿瘤生长明显减慢，小鼠生存率（转染后３０天）明显提高（Ｐ＜０．０１）。结论Ｄｏｓｐｅｒ┐ＡＡＶ增强质粒复合物能有效介导ＩＬ┐２基因表达，产生较好的抗瘤效应，此方法简便、更适合于临床应用     

瘤内注射pSTbAT-脂质体复合物对裸鼠移植瘤抑制效应的实验研究

目的:构建血管生成抑制因子arresten基 因的真核表达载体,并观察瘤内注射质粒DNA 脂质 体复合物对裸鼠移植瘤生长的影响。方法:利用 PCR方法,由重组质粒pGEM Arr中扩增出基因;将 该基因定向克隆于真核表达载体中。20只裸鼠皮 下注射HepG 2细胞,成瘤后以成功构建的质粒 DNA 脂质体复合物瘤内注射,治疗后采用免疫组化 方法检测肿瘤血管密度,并利用arresten基因瘤内注 射的方法对抑制肿瘤的效果进行分析。结果:我们 成功构建arresten基因真核表达载体(pSTbAT)。实 验组肿瘤生长速度较对照组慢(实验组平均15.3个 阳性血管/10个视野,对照组平均112.5个阳性血 管/10个视野)。结论:瘤内注射arresten基因质粒 DNA复合物能抑制裸鼠移植瘤的血管生成,并能抑 制移植瘤的生长。     

脂质体介导mIL-12基因与MHCⅠ基因联合对小鼠实验性肝癌的治疗作用

背景与目的：白细胞介素-12及MHCⅠ基因均已单独用于肿瘤基因治疗,为探索两者的抗肿瘤协同效应,本研究探讨小鼠白细胞介素-12（mIL-12)基因与同种异型的MHCⅠ（小鼠为H-2K）基因联合治疗Balb/C小鼠实验性肝癌。方法：分别应用含mIL-12基因,C57BL/6小鼠H-2K^bcDNA及绿色荧光蛋白（GFP）报告基因的真核表达质粒载体pcDNA3。体外经新型脂质体LipofectAMINE2000(LF2000)介导转染小鼠肝癌细胞株MM45T.Li,检测转染细胞外源基因的表达,将经LF2000介导pcDNA3/mIL-12与pcDNA3/H-2K^b转染的MM45T.Li细胞,注射于小鼠皮下,观察致瘤性的变化,在荷瘤Balb/C小鼠瘤内注射上述脂质体-DNA复合物,观察瘤体生长情况及小鼠生存期的改变。结果：LF2000介导pcDNA3/GFP转染MM45T.Li细胞的最佳条件为脂质体与DNA为3：1（μg：μg）,转染效率达30%,经LF2000介导pcDNA3/mIL-12与pcDNA3/H-2K^b转染的MM45T.Li细胞,RT-PCR检测有mIL-12和H-2K^bcDNA的特异扩增片段,WesternBlot检测显著有57kDaH-2K^b蛋白表达,ELISA检测mIL-12分泌量达48ng/ml/10^6细胞,经LF2000介导pcDNA3/mIL-12与pcDNA3/H-2K^b转染的MM45T.Li细胞,其致瘤性下降;荷瘤Balb/C小鼠瘤内注射该脂质体-DNA复合物,FACS检测显示小鼠脾脏淋巴细胞中CD3^ ,CD4^ 和CD8^ 的数量治疗组较对照组高,肿瘤生长相对缓慢,且pcDNA3/mILp-12与pcDNA3/H-2K^b联合治疗具有一定的正协同效应。结论：mIL-12基因与MHCⅠ基因联合治疗小鼠肝癌具有正协同效应,增强了抗肿瘤效果。     

阳离子脂质体介导的HSV-tk自杀基因疗法的体内外抗肝癌作用

为研究阳离子脂质体介导HSV-tk自杀基因系统的体内外抗肝癌作用,本课题用基因重组技术构建了含HSV-tk基因的重组逆转录病毒载体,命名为pLXT。用Lipofectin介导转染人肝癌细胞系SMMC-7721,经G418筛选抗性克隆及流式细胞仪分析,获得了持续表达HSV-tk的克隆细胞SM/tk。~3H-TdR掺入法测定表明HSV-tk/ACV系统对SM/tk细胞具有强杀伤力。将Lipofectin-pLXT复合物直接注射于鼠肝癌细胞(H22)实体瘤内,ACV治疗后监测抑瘤率,发现脂质体介导pLXT、ACV治疗组及裸pLXT注射、ACV治疗组平均瘤体积均显著小于其它六组对照组(P<0.001,P<0.05),前两者比较亦有显著差异(P<0.02)。空载体转染组和阴性对照组平均瘤体积及平均瘤重均无显著差异(P>0.05)。这些结果表明阳离子脂质体介导重组逆转录病毒载体基因转染的方法简便、安全、有效,且可使目的基因获得持续表达;在体内HSV-tk/ACV系统具有强的细胞毒作用,提示存在着强的旁观者效应。此外,瘤体内直接注射裸HSV-tk基因的治疗也有效。     

应用脂质体及直接注射法在小鼠体内表达人生长激素的研究

本文以构建的含人生长激素(hGH)cDNA的重组真核表达质粒为外源靶基因,研究了直接注射质粒及脂质体与质粒复合物后hGH在小鼠体内表达的情况.用RT-PCR技术检测hGH转录产物,用免疫放射检测分析法(IRMA)检测hGH蛋白质表达水平.结果发现,注射质粒与脂质体复合物组的表达效率高于单纯质粒组,Lipofectamine的作用强于Lipofectin,表明应用脂质体及直接注射法是使外源靶基因在小鼠体内表达的简便、有效途径.     

瘤内注射pSTbAT-脂质体复合物对裸鼠移植瘤抑制效应的实验研究

目的：构建血管生成抑制因子arresten基因的真核表达载体，并观察瘤内注射质粒DNA-脂质体复合物对裸鼠移植瘤生长的影响。方法：利用PCR方法，由重组质粒pGEM-Arr中扩增出基因；将该基因定向克隆于真核表达载体中。20只裸鼠皮下注射Hepp2细胞，成瘤后以成功构建的质粒DNA-脂质体复合物瘤内注射，治疗后采用免疫组化方法检测肿瘤血管密度，并利用arresten基因瘤内注射的方法对抑制肿瘤的效果进行分析。结果：我们成功构建arresten基因真核表达载体(psTbAT)。实验组肿瘤生长速度较对照组慢(实验组平均15．3个阳性血管／10个视野，对照组平均112．5个阳性血管／10个视野)。结论：瘤内注射arresten基因质粒-DNA复合物能抑制裸鼠移植瘤的血管生成，并能抑制移植瘤的生长。     

转基因表达的IFN-γ与重组IFN-γ对小鼠结肠癌的治疗作用

目的:评价IFN-γ转基因方法与肿瘤内注射重组IFN-γ对荷瘤小鼠的治疗作用。方法:用小鼠结肠癌细胞CT26接种于Balb/c小鼠皮下,建立小鼠皮下种植模型;小鼠成瘤后分成5组(每组9只),分别进行不同的干预。A组,瘤内注射阳离子脂质体Lipofectamine和含huIFN-γ全长基因的真核表达质粒pcDNA3-huIFN-γ的混合液,1周后重复1次;B组,瘤内注射重组huIFN-γ,每日1次,连续4周;C组,瘤内注射重组huIFN-γ,每周3次,连续4周;D组,瘤内注射生理盐水,每日1次,连续4周;E组,瘤内注射空载质粒pcDNA3与Lipofectamine的混合液,1周后重复1次。比较种植瘤的体积,并取肿瘤组织进行病理学检查及FCM分析。结果:与D、E组比较,A、B、C组抑瘤效应明显;A、B、C组皮下肿块镜下观察见大量淋巴细胞浸润,流式细胞仪检测显示CD3 、CD4 T淋巴细胞的百分率明显高于D、E组。结论:IFN-γ转基因治疗对荷瘤小鼠的肿瘤生长有抑制效应,转基因治疗组与重组IFN-γ每日给药组抑瘤效果相当,而优于重组IFN-γ间断给药组。     

In situ cancer vaccination with a replication-conditional HSV for the treatment of liver metastasis of colon cancer

In this study, we investigated the therapeutic efficacy of a replication-conditional mutant HSV, G207, for the treatment of liver metastasis of colon carcinoma. Three liver metastasis models in syngeneic BALB/c mice were developed: (i) splenic injection, (ii) splenic and subcutaneous (s.c.) injection, and (iii) orthotopic implantation of CT26 colon carcinoma. In the splenic injection model, G207 was injected into the established splenic tumor on day 7. In the splenic and s.c. injection model, G207 were injected into the established s.c. tumor on days 5 and 8. In the orthotopic implantation model, a piece of CT26 tumor tissue was transplanted onto the wall of the cecum and G207 was injected in the established cecum tumor on day 7. On day 21 or 28, animals were sacrificed and liver metastases were evaluated. In all three models in immunocompetent mice, liver metastases were significantly reduced by intratumoral inoculation with G207 compared to the control. In athymic mice, however, there was no significant therapeutic effect of intratumoral inoculation with G207 on liver metastases. Tumor-specific cytotoxic T-lymphocyte responses were induced in mice treated with G207 in the orthotopic implantation model. These results suggest that intratumoral inoculation of G207, as an in situ cancer vaccine, can be an effective approach against liver metastasis of colon cancer and the efficacy involves tumor-specific T-cell responses.     

Therapeutic effect of intratumoral injection of bcg and other substances in rats and mice.

The experimental treatment of a rat sarcoma (McFiFi 2) by intratumoral injection of BCG2 is described. Tumors which have a mean diameter of less than 10 mm at the beginning of treatment are fully susceptible to BCG, although spontaneous regression is not observed at this stage. The effective dose of living BCG ranges from two injections of 0.1 mg to two injections of 1 mg, given IT at an interval of 7 days. The permanent cure of a proporation of the tumors may also be induced by IT injection of a similar dose of heat-killed BCG or of MER, or of 10(9) heat-killed C. parvum, according to the same schedule. Preimmunization of the rats with living BCG does not improve the efficiency of heat-killed BCG. Direct contact between the therapeutic material and the tumor cells is critical. If rats are grafted with two pieces of the same tumor in widely separated sites, the intratumoral treatment of only one of these tumors with living BCG is sufficient to induce regression of both tumors in 50% of the animals. The effect of BCG is counteracted by injection of silica or by ingestion of polaramine. The same intratumoral treatment with living BCG was applied to different rat and mouse tumors. Only McFiFi 2 tumors were cured by intralesional BCG. C3H mouse plasmocytoma 5563 was not cured by intratumoral BCG but its growth could be prevented by mixing BCG and tumor cells at the time of grafting; this tumor was considered to be of medium susceptibility. However, until there is definite proof that the two mechanisms are identical, one should consider the regression and cure of a growing tumor, and the prevention of tumor growth, as two different phenomena. The clinical treatment of human tumors resembles the first experimental procedure more closely than the second.     

AFP/ANGIO/TK靶向性融合基因治疗人原发性肝癌的效果观察

目的：研究pcDNA3／AFP／angio／tk靶向性融合基因系统对人原发性肝癌皮下移植瘤的治疗效果。方法：建立人原发性肝癌裸小鼠皮下移植瘤模型。将荷瘤裸小鼠随机分为5组（每组6只）：肿瘤对照组；空质粒组；GCV组；pcDNA3／angio／tk组及pcDNA3／AFP／angio／tk组。瘤内分别注射不同的质粒，同时于裸鼠腹腔内注射GCV，在第二次瘤内给药后第2天及第三次瘤内给药后第15天，分别处死裸鼠进行检测（每次3只）病理学检查；原位末端标记（TUNEL）法检查细胞原位凋亡；透射电镜观察细胞超微结构变化。结果：病理学检查结果显示，prDNA3／AFP／angio／tk融合基因瘤内注射可明显抑制肿瘤生长。TUNEL法检测显示．pcDNA3／AFP／angio／tk组凋亡指数明显高于肿瘤对照组。透射电镜观察细胞超微结构变化，发现pcDNA3／AFP／angio／tk组有明显的细胞凋亡发生。结论：pcDNA3／AFP／angio／tk靶向性融合基因系统可显著抑制肿瘤的生长，而且作用效果优于pcDNA3／angio／tk融合基因系统（P〈0.05）。     

Inhibition and stimulation of the growth of Krebs-2 carcinoma by BCG vaccine.

The effect of BCG vaccine on the growth of imtransplants of Krebs-2 carcinoma in mice was studied. The simultaneous injection of BCG and tumor cells either inhibited tumor growth (BCG given in admixture with tumor cells) or stimulated it (BCG injected contralateral to the tumor transplantation site). The BCG dose was directly related to the effect. Tumor growth was also stimulated by the ip injection of starch or liquid paraffin. In these experiments, the BCG effect was attributed to the redistribution of cells involved in nonspecific and specific tumor resistance. Shortly after BCG prevaccination, particularly when BCG doses were high and mice were susceptible to vaccine infection, BCG was either without effect or stimulated tumor growth; later, however, tumor growth was inhibited regardless of the BCG dose and the injection site of the BCG. The effect of BCG prevaccination was suggested to be due to: 1)the distraction of macrophages and T-lymphocytes to defend the host against the multiplying mycobacteria, and 2)the activation of the pool of these cells that become capable to participate in antitumor resistance after mycobacteria elimination.     

Antitumor effect of intralesional injection with formalin-fixed Toxoplasma gondii organisms on Lewis lung carcinoma in Toxoplasma-infected mice

The antitumor effect of formalin-fixed Toxoplasma organisms (f-Tp) as an immunostimulant was examined in Toxoplasma-infected female C57BL/6 mice using a syngeneic Lewis lung carcinoma (3LL). Toxoplasma-infected mice, intradermally inoculated with the tumor cells mixed with 10(5), 10(6) or 10(7) f-Tp, developed a marked antitumor effect, inhibition of tumor growth and prolongation of life-span, in direct relation to the strength of the delayed-type hypersensitivity (DTH) reaction induced by f-Tp. The antitumor effect could also be observed even if an intralesional injection with f-Tp was performed 1, 3 or 5 days after the tumor inoculation. In a control, the injection with 2.5 X 10(6) live Mycobacterium bovis (BCG) in BCG-sensitized mice induced a significant antitumor effect, only when the BCG was injected in the mixture of tumor cells. These results demonstrate that the injection with f-Tp can induce a potent antitumor activity in mice with Toxoplasma infection.     

Inhibition of murine sarcoma virus oncogenesis with living BCG

Intramuscular inoculation of murine sarcoma virus of Moloney (MSV-M) leads to the development of tumors at the site of injection. The effect of BCG treatment on tumor induction by MSV-M in BALB/c mice was studied. Mice injected with BCG 28 days before induction of tumors with MSV-M alone had shorter latent periods for tumor development and longer survivals than mice not previously exposed to BCG. When BCG was mixed with the MSV-M used for tumor induction there was a significant decrease in mortality, tumor incidence, and tumor size compared to those seen in mice inoculated with MSV-M alone. Previous exposure of the mice to BCG before attempted induction of tumors with the mixture of BCG and MSV-M completely inhibited tumor development. In addition, these mice were effectively immunized against tumor development when subsequently challenged with a lethal dose of MSV-M. The mechanisms of BCG's impressive activity are discussed.     

Aglaroxin C对小鼠H22肝癌移植瘤的抑制作用及对其脏器的影响

目的:探讨楝酰胺衍生物Aglaroxin C对小鼠H22肝癌皮下移植瘤的影响及在实验剂量下对小鼠各脏器有无影响。方法:建立BALB/C小鼠H22腋下实体瘤模型,并随机分为Ⅰ组（尾静脉给药对照组）、Ⅱ组（尾静脉给药组,0.1 mg每只）、Ⅲ 组（瘤内给药对照组）、Ⅳ组（瘤内给药组,0.05 mg每只）、Ⅴ组（瘤内给药组,0.1 mg每只）,每组各5只。隔天给药(Aglaroxin C)一次,共4次。每日测量小鼠体重。末次给药24小时后切除肿瘤及各组小鼠主要脏器并称重,计算抑瘤率、脏器系数。用各组肿瘤及各脏器制作病理切片,苏木精-伊红染色（hematoxylin-eosin staining,HE染色）,并在光镜下观察其细胞形态学变化。结果:Ⅰ组、Ⅱ组、Ⅲ组、Ⅳ组、Ⅴ组的瘤体质量分别为（2.11±0.50） g、(1.59±0.14) g、(2.30±0.64) g、(1.66±0.12) g、(1.06±0.14) g,Ⅱ组瘤体质量明显小于Ⅰ组（P＜0.01),Ⅲ组、Ⅳ组、Ⅴ组比较差异有统计学意义（P＜0.01)。Ⅴ组的抑瘤率最高达53.91%。显微镜下观察肿瘤病理切片,给药组坏死肿瘤细胞明显增多,对照组肿瘤细胞坏死轻微;各组小鼠体质量组间变化无明显统计学意义（P＞0.05）;显微镜下观察各脏器病理切片,各给药组与对照组相比,无明显异常;脏器系数各剂量组与对照组组间比较,差异无统计学意义（P＞0.05）。结论:Aglaroxin C对小鼠H22肝癌皮下移植瘤的生长有抑制作用,在实验剂量下对小鼠各脏器无明显影响。     

Antitumor activity of murine tumor necrosis factor (TNF) against transplanted murine tumors and heterotransplanted human tumors in nude mice

The antitumor activity of highly purified tumor necrosis factor (TNF) was tested against eight kinds of murine tumor and five kinds of human tumor heterotransplanted into nude mice. Mice were treated by intravenous or intratumoral injection of TNF, commencing when the tumors were well established. TNF showed an excellent curative effect against all kinds of murine and human tumors tested. Meth A sarcoma, Colon 26, Ehrlich, sarcoma 180, MM 46, MH 134, B16 melanoma, and Lewis lung tumors transplanted into mice underwent tumor necrosis and regression following a single injection of TNF. Sometimes a complete cure was observed in Meth A sarcoma, sarcoma 180, Ehrlich, and MM 46 tumors. Human cancers, SEKI, HMV-I, KATO-III, MKN 45, or KB, heterotransplanted into nude mice, also exhibited tumor necrosis and regression in size following several intratumoral injections of TNF. A great difference in curative effects of TNF was observed in Meth A sarcomas between those transplanted into BALB/c nu/+ and into BALB/c nu/nu mice: following a single intravenous administration the effect was stronger in BALB/c nu/+ than in nu/nu mice. In contrast, tumor necrosis was almost the same in nu/+ and nu/nu mice following intratumoral administration. The present results thus indicate that TNF from mice had an antitumor activity against not only murine tumors but also human tumors. In addition to direct cytotoxicity against tumor cells, TNF induced a host-mediated factor which contributed to the antitumor effects.     

瘤内注射紫杉醇脂质体对小鼠H22移植瘤抑制作用的研究

目的比较瘤内注射和静脉注射紫杉醇脂质体对小鼠H22肝细胞癌皮下移植瘤的抑瘤作用,探讨瘤内注射微球化疗药物应用的可行性。方法采用ICR小鼠建立H22皮下移植瘤模型,随机分为瘤内注射紫杉醇脂质体组（IT-PL）、静脉注射紫杉醇脂质体组（IV-PL）和瘤内注射5％葡萄糖溶液组（IT-GS）。10天后待瘤体生长至直径10mm左右,分别予经超声引导瘤内注药及尾静脉给药处理。紫杉醇脂质体的给药浓度为3mg／ml,剂量为75mg／kg,每周1次,共2周。采用近红外荧光活体显像法观察注药24h内药物在小鼠体内的分布情况。隔日记录瘤体积变化并观察小鼠的不良反应,计算各组的抑瘤率。瘤体组织石蜡包埋后行HE染色。结果超声引导下瘤内注射紫杉醇脂质体时,针头附近区域见回声增高有助于确认药物分布于瘤体内。近红外荧光活体显像示瘤内注射24h药物持续集中在瘤体内,无明显全身分布;静脉注射药物则逐渐集中至瘤体,但瘤体内的药物浓度低于瘤内注射组。IT-PL组与IV-PL组的抑瘤率分别为95.0％和56.1％,差异有统计学意义（P＜0.05）。病理组织学检查示IT GS组的肿瘤细胞生长旺盛,而IT-PL组的瘤体内及周边有脂质沉积,仅边缘少量残存肿瘤细胞。瘤内注射部位皮下组织未见溃破、糜烂;未观察到明显全身不良反应。结论紫杉醇脂质体瘤内注射有可能成为针对局部实体肿瘤安全、有效的给药模式。