Anticancer effect of Jinlongshe granules on in situ-transplanted human MKN-45 gastric cancer in nude mice and xenografted sarcoma 180 in Kunming mice and its mechanism

AIM： To study the antitumor effect of Chinese compound Jinlongshe （JLS） granules on sarcoma 180 and MKN-45 human gastric cancer cell lines in vivo and its mechanism. METHODS： After establishment of S180 sarcoma （S180） and MKN-45 gastric cancer model of nude mice, the tumor-bearing mice were divided into 5 groups at random. Three experimental groups were respectively given the aqueous extract of JLS granules at doses of 120 g, 60 g and 20 g/（kg per 6/wk,i.g） for 3 wk in S180 and 6 wk in nude mice model. Positive control was given cyclophosphamide （Cy） at a dose of 50 mg/（kg per 3/wk, i.g） for 3 wk in S180 models and 5-Fluorouracil （5-FU） 20 mg/（kg per 3/wk, i.g） for 3 wk in nude mice model. Negative control was given normal saline （NS） at a dose of 0.18 g/（kg per 6/wk, i.g） respectively. After 3 wk in mice bearing S180 tumor and 6 wk in nude mice model, the experimental animals were sacrificed and the masses of tumor were weighed, and the rates of tumor inhibition of each treated group were calculated respectively. To determine the antitumor mechanisms, the morphological changes, cell cycle and apoptosis were observed in MKN-45 nude mice model. Annexin V-FITC/PI double staining FCM assay was used to further determine the live cells, apoptotic cells, necrotic cells and debris. RESULTS： The inhibitory rates of JLS granules at the doses of 20 g/kg, 60 g/kg and 120 g/kg were 50.31%, 55.94% and 68.13% （P 〈 0.01） in nude mice models and 40.90%, 50.32% and 58.46% （P 〈 0.01） in S180 model. The inhibitory rate of Cy was 85.22% in S180 models and the inhibitory rate of 5-FU was 53.43% in nude mice model （P 〈 0.01）. Nuclear chromatin and margination were observed under a transmission electron microscope （TEM）. The G0/G1 phase was arrested, typical apoptotic peak appeared, the apoptotic rate was 22.81%-38.54% in three JLS granule-treated groups. Annexin V-FITC/PI double staining FCM assay showed that the apoptotic cells were 4.36%, 3.08% and 7.08% in three dosages, most cells were localized in the low right quadrant. CONCLUSION：Jinlongshe granules possess anti-tumor effects on experimental tumor models in vivo, and apoptosis induction is one of its anti-tumor mechanisms.

Fruiting increases total content of flavonoids and antiproliferative effects of Cereus jamacaru D.C. cladodes in sarcoma 180 cells in vitro

Objective: To evaluate the influence of fruiting phenological stage on total flavonoid content, antioxidant activity, and antiproliferative effects of Cereus jamacaru(C. jamacaru)(mandacaru) cladodes and fruit. Methods: Fruit and cladodes at vegetative and fruiting stage of C. jamacaru were collected. The fruit was dissected and bark, pulp, and seeds were separated. Vegetative and fruiting cladodes, together with bark, pulp, and seeds were used to obtain five hydroalcoholic extracts. The extracts were investigated for total flavonoid content, using AlCl3 colorimetric method, antioxidant activity by 2,2-diphenyl-1-picrylhydrazyl and 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radical scavenging capacity and Fe^(2+) ion chelating activity, and in vitro antiproliferative effects(sarcoma 180 cells) by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2 H-tetrazolium bromide assay. Results: The extract of C. jamacaru cladodes at the fruiting stage showed higher flavonoid content compared to the other extracts. Seed extracts showed the highest antioxidant activity in 2,2-diphenyl-1-picrylhydrazyl and 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) assays, and the extract of cladodes at vegetative stage showed better antioxidant activity in Fe^(2+) ion chelating activity. The extract of fruiting cladodes promoted higher antiproliferative effects compared to the other extracts. Conclusions: These findings suggest that fruiting increases the content of flavonoids and antiproliferative effects of C. jamacaru cladodes. Data reinforce the potential use of C. jamacaru cladodes and fruits as natural antioxidants and potent anticancer agent.

Antitumor effect and mechanism of Gecko on human esophageal carcinoma cell lines in vitro and xenografted sarcoma 180 in Kunming mice

AIM: To investigate the anti-tumor effect of Chinese medicine Gecko on human esophageal carcinoma cell lines and xenografted sarcoma 180 in Kunming mice and its mechanism. METHODS: The serum pharmacological method was used in vitro . The growth rates of the human esophageal carcinoma cells (EC9706 or EC1) were measured by a modifi ed 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The transplanted tumor model of the mouse S180 sarcoma was established. Fifty mice were randomly divided into fi ve groups (n = 10). Three Gecko groups were treated respectively with oral administration of Gecko powder at a daily dose of 13.5 g/kg, 9 g/kg, and 4.5 g/kg. The negative group (NS group) was treated with oral administration of an equal volume of saline and the positive group (CTX group) was treated with 100 mg/kg Cytoxan by intraperitoneal injection at the fi rst day. After 2 wk of treatment, the anti-tumor activity was evaluated by tumor tissue weighing. The impact on immune organ was detected based on the thymus index, spleen index, phagocytic rate and phagocytic index. The protein expression of vascular endothelingrowth factor (VEGF) and basic fibroblast growth factor (bFGF) were detected by immunohistochemistry. The cell apoptotic rate was detected by terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end labeling (TUNEL) assay. RESULTS: The A value in each group treated with Gecko after 72 h was reduced signif icantly in EC9706 and in EC1. The tumor weight in each group of Gecko was decreased signifi cantly (1.087 ± 0.249 vs 2.167 ± 0.592; 1.021 ± 0.288 vs 2.167 ± 0.592; 1.234 ± 0.331 vs 2.167 ± 0.592; P < 0.01, respectively). However, the thymus index and Spleen index of mice in Gecko groups had no significant difference compared with the NS group. The immunoreactive score of VEGF and bFGF protein expression of each Gecko group by immunohistochemical staining were lowered signifi cantly. The apoptosis index (AI) of each group was increased progressively with increase of dose of Gecko by TUNEL. CONCLUSION: Gecko has anti-tumor effects in vitro and in vivo; induction of tumor cell apoptosis and the down-regulation of protein expression of VEGF and bFGF may be contributed to anti-tumor effects of Gecko.

Antitumor activity and biodistribution of DHA-NLC formulation in sarcoma 180-bearing mice

Lipid nanoparticles have become attractive for its prominent properties recent years. In this paper, in vivo anti-tumor efficacy of nanostructured lipid carrier of dihydroartemisinin （DHA-NLC） were evaluated in sarcoma 180-bearing mice model through intraperitoneal （i.p.） administration. In vivo biodistribution was also investigated in Kunming mice bearing S180. Results demonstrated that the intraperitoneally injected DHA-NLC could significantly inhibit tumor growth at the dose levels of 20, 40 and 80 mg/kg, and their inhibition rates were 71.24%, 79.20% and 85.74%, respectively. The biodistribution of DHA after intraperitoneal injection of DHA-NLC in S180-bearing mice is remarkably different from the DHA solution. Therefore, DHA encapsulated in NLC does demonstrate superior anticancer effect to DHA suspension on S 180-bearing mice at the same dose and displayed a dose-dependent antitumor efficacy.

生物信息大分子功能的研究——酵母甘露聚糖对鼠Sarcoma-180瘤生长的抑制效应

酵母甘露聚糖(Mannan,简称Man)是能参与生物信息流影响生物体、特别是在糖基化方面起着重要调控作用的生物信息大分子。它是否能在抑制生物机体中肿瘤生长方面具有重要作用?研究结果表明:酵母甘露聚糖既能使患S-180瘤鼠的体质增强的同时又有抑制其体内所患S-180瘤生长的功效。Man抑制患鼠机体内的S-180瘤生长的功效(抑瘤率)随用量的增加而提高,当Man用量达360 mg(40 mg/Kg/d·9d)时,其抑瘤率达98.4%的最高水平,此时鼠体重增加1.66倍。Man的抑瘤功效有最佳适用量并存在性别敏感性,通常是雄性鼠的抑瘤率高于雌性鼠。Man抑制鼠S-180肿瘤生长的作用优于市售5-氟尿嘧啶的作用。

AUGMENTATION OF IMMUNE FUNCTIONS AND AUTOLOGOUS TUMOR-KILLING ACTIVITY BY KAPPA-SELENOCARRAGEENAN IN MICE BEARING SARCOMA 180

Objective: To study the enhancement of the immune functions and autologous tumor killing (ATK) activity by kappa selenocarrageenan (KSC) in mice bearing sarcoma 180. Methods: To measure the effects of KSC and/or Cyclophosphamide (Cy) on natural killer (NK) activity, lymphokine activated killer (LAK) activity, the produc tion of interleukin 2 (IL 2), ATK activity and the growth of sarcoma 180 (S 180 ). Results: KSC promoted NK activity, LAK activity and ATK activity in vivo , increased IL 2 production at 40 mg/kg/d×9d. It also enhanced the antitumor action of Cy (20 mg/kg/d×9d) and offset the inhibition of Cy on immunocopetent cells. The ATK activity in splenocytes of S 180 bearing mice could be induced and increased by recombinant interleukin 2 (rIL 2) in vitro . Conclusion: KSC has an up regulating effect on the immune functions and ATK activity in tumor bearing mice. It can be used as a biological response modifier (BRM) in cancer biotherapy.

Inhibition of Yuyihe Powder on Tumor Growth in Mice Models of Sarcoma 180

Objective To explore the antitumor effect of Yuyihe Powder（Yu Yi He San,YYHS） and its antitumor mechanism.Methods After treatment,tumor weight,immune apparatus weight,the life span of transplanted animals,spleen lymphocyte proliferation assays,and IL-2 concentration in mouse serum were recorded or detected.Results YYHS showed strong antitumor ability.Compared with control group,mid-dose YYHS（1.0g/kg） could inhibit the tumor growth,prolong the life span of S180-bearing mice to some extent,significantly increase the thymic and splenic indices of S180 mice,and strongly promote the secretion of IL-2 in blood;The inhibitory rate on tumor growth and life prolongation rate were 37.1%and 38.37%,respectively.Conclusion YYHS could not only significantly inhibit the growth of S180 cells,but also markedly prolong the survival time of S180 bearing mice.The mechanism of antitumor effect could obviously enhance immunologic function of the S180 bearing mice to inhibit the growth of S180 cells.

Modulation of MMP-2 and TIMP-2 by low dose radiation in mice bearing S180 sarcoma

Objective To investigate the inhibition of low dose radiation （LDR） on S180 sarcomas and its modulation of MMP-2 and TIMP-2 in mice. Methods $180 subcutaneously implanted tumor model mice were randomly divided into two groups： control （N） and low dose radiation （LDR） groups. N mice were sacrificed after 12 h, whereas LDR mice were sacrificed after 12 （LDR-12 h）, 24 （LDR-24 h）, 48 （LDR-48 h）, and 72 （LDR-72 h） h. Thereafter, we measured the tumor volumes. Histopathology was performed, and P-V immunohistochemistry was applied to assess MMP-2 and TIMP-2 expression. Results Compared with the control group, the tumor growth was significantly inhibited in the LDR groups （P 〈 0.05）. MMP-2 expression was considerably reduced in LDR-24h （P 〈 0.05） and LDR-48h （P 〈 0.05）, whereas the change of TIMP-2 was not obvious in the LDR groups （P 〉 0.05） in contrast to that of the control group. Conclusion LDR can effectively suppress the growth of S180 implanted tumors by reducing MMP-2, which is associated with invasion and metastasis.

Effect of hyperthermia in combination with cryotherapy on sarcoma 180 in mice

The significant decrease in tumor recurrence caused by combined hyperthermia (local water bath) with cryotherapy has previously been shown. This study demonstrated an in vivo additive interaction of local microwave diathermy (hyperthermia, 42±0.5℃, 20 min. ) and liquid nitrogen treatment (cryotherapy,-180℃, 3 min. ) against intraperitoneally implanted sarcoma 180 in ICR mice. Local hyperthermia was produced by applicating 2450 MHz microwave to the region of the tumor without induction of significant whole body hyperthermia.Both hyperthermia and cryotherapy were delivered as a single dose individually on day 1 and day 2. The analysis of the tumor size curves showed that all of the treatments had more significant effect on sarcoma 180 than on the control group (P < 0. 0001 ). The optimal sequence of the combined therapies found in the experiment was cryotherapy→hyperthermia (CH) (P<0. 0001). Weights of the tumors excised from the mice on day 11 showed that the combined therapies (cryotherapy→hyperthermia or hyperthermia→cryotherapy) were more effective on sarcoma 180 than hyperthermia or cryotherapy used alone(P<0.01).

EFFECTS OF GALLIUM AND ITS COMBINATION WITH SELENIUM ON MOUSE S_180 SARCOMA AND BONE GALLIUM CONTENT

Kunming female mice were used and S180 sarcoma cells were transplanted subeutaneously into right anterior armpit or the mice. The mice were divided into three groups randomly, and orally administered with water, gallium chloride and GaCl3+ Na2SeO3 respectively for 2 weeks. After that,the tumors and foreleg bones were taken out for study. The experimental results showed that oral administration with gallium chloride-could inhibit the growth or S180 sarcoma in mice and the tumor morphology was changed. Selenium could accelerate the gallium entering into bone. This fact might supply a new clue to further clinical application of gallium and selenium.

The effect of low-dose total body irradiation on tumor-inhibition and signal transduction in tumor tissues of mice bearing S180 sarcoma

Objective： By studying the influence of low-dose total body irradiation to proliferating cell nuclear antigens （PCNA）, epidermal growth factor receptor （EGFR）, erythropoietin （EPO） and vascular endothelial growth factor receptor （VEGFR） of tumor tissues in mice bearing S180 sarcoma, to further explore the mechanism of low doses radiation. Methods：S180 sarcoma cells were implanted subcutaneously into 58 male Kunming mice. Randomly these mice were divided into sham-irradiation （S） group and low-dose radiation （LDR） group. 12 days after implantation, the mice in LDR group were once delivered 75 mGy total-body ^60Co y-ray irradiation, while the mice in S group were left without irradiation. Then the mice in LDR group were executed at 6 h （LDR-6h group）, 12 h （LDR-12 h group）, 24 h （LDR-24 h group）, 48 h （LDR-48 h group） and 72 h （LDR-72h group） after irradiation. Tumor tissues were weighed and histological observed. Immunohistochemical staining was used to detect the expression of PCNA, VEGF, EPO and VEGFR of tumor tissues. Results： Though there was no significant difference between LDR group and S group in tumor weight, after irradiation the expression of PCNA and EPO of tumor tissues in LDR group decreased with time. LDR-24h, LDR-48h and LDR-72h groups were all statistically significantly different from S group. The expression of EGFR and VEGFR also decreased, and LDR-24h group was the lowest （P 〈 0.05）. Conclusion： Seventy-two h after low-dose total body irradiation, there was no significant change in tumor size of mice bearing S180 sarcoma. Low-dose total body radiation decreased the expression of PCNA inhibiting tumor growth; reduced the expression of EGFR in tumor tissue impacting the signal transduction of tumor cells. The study also indicated that low-dose total body irradiation, within a certain period of time, can decrease the expression of hypoxia factor EPO and VEGFR, which may improve the situation of tumor hypoxia and radiosensitivity of tumor itself.

DAMAGES OF GYPENOSIDES ON THE ULTRASTRUCTURES OF S-180 SARCOMA IN MOUSE

The significant inhibition action of Gypenosides (GP) to many kinds or tumor strain wesreported before. The erfects of GP on the ultrastructures, without any findiys in present litrature,of S-180 sarcoma in mouse were studied through electron microscope in this article. The results indicated that the ultrastructures of.S-180 sarcoma cells were destructed obviously by the administratiouof GP to the tumor-bearing mouse with a Pattern or dose-depeudant, especially to the cellular nuclear. We saw both apoptosis and necrosis in morphologic alterations in tumor cells, suck as a reductionin cellular volume. an increase in cytoplasm, uucleoplasm electron density and condensation of nuclear chromatiu either to periphery or the nuclear membrane or inclumps within the cell, lots of inthe cytoplasm and apoptotic body in some turner cells or some cytoplast breaking into small frag- ments etc.

小柴胡汤对荷瘤鼠S_(180)细胞生长和结构影响的研究

目的：通过体内实验，探讨小柴胡汤（ＸＣＨＴ）浸膏对荷瘤鼠Ｓ１８０的抑制作用。方法：采用透射电镜观察小柴胡汤对瘤细胞生长和结构的影响。结果：高、中和低浓度ＸＣＨＴ（１０００ｇ·Ｌ－１、５００ｇ·Ｌ－１、２５０ｇ·Ｌ－１）溶液治疗后，对荷瘤鼠Ｓ１８０细胞均有明显抑制作用，抑瘤率４０１９％～５８７３％，其中以高浓度组疗效最佳。同时可见经ＸＣＨＴ治疗后各组Ｓ１８０细胞均出现凋亡的特征，表现为细胞体积变小，核固缩，胞浆和核染色质凝集，密度增高，细胞间有大量凋亡小体，其中以低浓度组为甚，而高浓度组Ｓ１８０细胞则以坏死为主。结论：ＸＣＨＴ对荷瘤鼠Ｓ１８０有明显抑制作用，可诱导Ｓ１８０细胞凋亡及坏死，其中瘤细胞以哪种死亡方式为主。

复方抗瘤冲剂抑制小鼠肉瘤180的生长及对p53和增殖细胞核抗原表达的影响

探讨复方抗瘤冲剂对小鼠肉瘤 180的作用及机制。通过体内实验 ,观察复方抗瘤冲剂对小鼠肉瘤180的抑瘤作用和免疫组化法检测p5 3和增殖细胞核抗原 (PCNA)的表达水平。结果显示 ,经复方抗瘤冲剂及其不同组合和CTX治疗 10天后 ,对小鼠肉瘤 180有不同程度的抑制作用 ,抑瘤率分别为 2 0 31%、6 5 6 %、12 5 %、19 0 6 %和 30 3%。同时各组药物对p5 3和PCNA的表达水平也有不同程度的影响。提示复方抗瘤冲剂对小鼠肉瘤 180的生长具有一定的抑制作用 ,其机制可能与抑制突变型p5

小柴胡汤对小鼠肉瘤S_(180)的抑制作用和血浆内皮素的影响

目的：探讨小柴胡汤（ＸＣＨＴ）对小鼠肉瘤Ｓ１８０的抑瘤作用及机制。方法：通过体内实验，观察不同浓度ＸＣＨＴ浸膏对小鼠肉瘤Ｓ１８０的抑制作用和用放射免疫测定法（ＲＩＡ）测定荷瘤小鼠血浆内皮素（ＥＴ）含量的变化。结果：高、中和低浓度ＸＣＨＴ（１０ｇ／ｍｌ，０５ｇ／ｍｌ和０２５ｇ／ｍｌ）溶液治疗１０天后，对小鼠肉瘤Ｓ１８０有明显的抑瘤作用，抑瘤率为４７７％～５６６％。同时发现荷Ｓ１８０肉瘤小鼠血浆内皮素水平明显高于正常对照组（Ｐ＜００５），而经过高、中、低浓度ＸＣＨＴ溶液治疗后荷Ｓ１８０肉瘤小鼠血浆内皮素含量明显降低，达到正常或低于正常水平。结论：ＸＣＨＴ对小鼠肉瘤Ｓ１８０的生长具有抑制作用。

五味子多糖对S180荷瘤小鼠红细胞免疫抗肿瘤的作用

目的:探讨五味子多糖(FSCP)增强荷瘤小鼠红细胞结构稳定性与红细胞免疫黏附功能的抗肿瘤作用及其红细胞免疫调节机制。方法:实验动物随机分为正常对照组、生理盐水组、环磷酰胺(CP)组及FSCP高、中、低3个剂量组。用药7d后,眼球取血,获得红细胞悬液。采用激光共聚焦技术检测荷瘤小鼠红细胞Ca2+含量的变化;采用分光光度法检测红细胞膜唾液酸(SA)含量、红细胞膜封闭度;采用荧光偏振法检测红细胞膜脂流动性(LFU);采用花环法检测红细胞天然免疫黏附能力。结果:与生理盐水组比较,FSCP各组能降低荷瘤小鼠红细胞Ca2+的浓度(P<0.01),增加红细胞膜表面SA含量(P<0.01)以及红细胞膜自我封闭度(P<0.05或P<0.01)。高剂量FSCP可提高S180荷瘤小鼠红细胞膜流动性(P<0.05);增强S180荷瘤小鼠红细胞免疫黏附肿瘤细胞的能力(P<0.05),FSCP高剂量组免疫花环率达到24.17%。结论:FSCP可能通过改善S180荷瘤小鼠红细胞膜的功能状态,提高膜的稳定性,增强红细胞免疫黏附肿瘤细胞的能力,从而发挥其抗肿瘤作用。

核糖核酸酶抑制因子对小鼠S_(180)的抑制作用机制研究

目的研究核糖核酸酶抑制因子对小鼠实体瘤生长的影响以及ＲＩ抑制肿瘤生长的机理。方法经硫酸铵盐析，ＤＥＡＥ－离子交换层析和Ｓｅｐｈａｒｏｓｅ－ＲＮａｓｅ亲和层析，从人胎盘中提取纯化核糖核酸酶抑制因子（ｒｉ－ｂｏｎｕｃｌｅａｓｅｉｎｈｉｂｉｔｏｒ，ＲＩ），将其注射给荷瘤小鼠。５天后处死小鼠，取瘤组织，称重；组织切片后观察瘤内毛细血管、组织坏死状况及核分裂数的改变。结果注射ＲＩ后，小鼠实体瘤Ｓ１８０的生长受到抑制，瘤组织毛细血管减少，坏死加强。结论ＲＩ抑制肿瘤的血管生成。

婴儿双歧杆菌对小鼠肉瘤S180的抑制作用

本文主要观察婴儿双歧杆菌(Bif. 189—3)对小鼠皮下移植肉瘤180(S180)的抑制作用。结果发现,该菌无论在S180移植前或移植后经皮下注射,均能明显抑制皮下移植S180的增长,并使带瘤鼠存活期显著延长。病理检查见实验组肿瘤坏死明显,肿瘤周围有大量炎症细胞浸润。提示该菌能非特异性增强肿瘤局部的免疫反应。

胡桃楸提取物对S_(180)肉瘤的抑制作用及机制

目的:研究胡桃楸提取物(JMME)对小鼠S180肉瘤的抑制作用及其免疫调节作用。方法:对3组荷瘤鼠(每组10只)用0.023、0.045和0.090 g.kg-1.d-1JMME灌胃给药,同时设阴性对照组和阳性对照组,检测JMME对小鼠体内移植性肿瘤S180肉瘤的抑瘤率;以细胞培养观察JMME对S180细胞生长的抑制作用;MTT法观察JMME对肿瘤坏死因子(TNF)活性和白细胞介素2(IL-2)诱生水平的影响。结果:JMME具有明显的抑制肿瘤的作用,不同浓度的抑瘤率分别为32%、43%和56%,与阴性对照组比较差异有显著性(P<0.05);对体外培养的肿瘤细胞增殖抑制率可高达60.10%,与对照组比较差异有显著性(P<0.05);TNF活性及IL-2诱生水平较对照组明显增高(P<0.05);。结论:JMME具有显著抑制肿瘤的作用,其抑瘤作用机制是抑制肿瘤细胞的增殖并调节机体的免疫功能。

小剂量顺铂联合^(32)P玻璃微球对小鼠S180瘤细胞的细胞毒作用

【目的】研究腹腔注射小剂量顺铂联合瘤内注射32P玻璃微球对小鼠S180实体瘤细胞的细胞毒作用,通过透射电镜观察比较不同治疗对肿瘤细胞的超微结构影响。【方法】将实验动物荷S180瘤小鼠28只随机分为4组,各组7只。4组小鼠随机定为空白对照组、单纯顺铂组、单纯32P玻璃微球间质注射组和顺铂联合32P玻璃微球间质注射组,治疗两周后取出肿瘤称瘤体质量,计算各组抑瘤率。分别取各组肿瘤组织行透射电镜观察,比较不同治疗对肿瘤细胞超微结构的影响。【结果】单纯顺铂组、单纯32P玻璃微球间质注射组及顺铂联合32P玻璃微球间质注射组抑瘤率分别为47%、40%、76%。小剂量顺铂联合32P玻璃微球间质注射组与两单独治疗组抑瘤率的差异有统计学意义(P﹤0.01)。电镜观察联合组细胞死亡率达75%,绝大部分肿瘤细胞消失,呈大片坏死结构。【结论】腹腔注射小剂量顺铂联合32P玻璃微球间质注射内放射治疗对小鼠S180实体瘤细胞的细胞毒作用较单独应用有明显增强。