Effects of raspberry rhizome decoction on expression of C-myc and Cath-D in tumor tissues of S180 tumor-bearing mice

Objective: To investigate the effects of RRD on the expression of nuclear protein regulatory genes (C-myc) and cathepsin D (Cath-D) in tumor tissues of S180 tumor-bearing mice, and to analyze the anti-tumor effect of RRD. Methods: Forty clean ICR healthy Kunming (KM) mice were randomly divided into four groups: model group, traditional Chinese medicine group (RRD), cyclophosphamide group (CTX) and combined drug group (RRD + CTX). Ten mice in each group were subcutaneously inoculated with S180 cell suspension at the axillary position to establish the model. After 24 h, the model group was given orally 0.02 mL/g/d with normal saline;RRD group was given orally 0.4 mL/20 g/d with RRD;CTX group was given orally 0.4 mL/20 g/d with normal saline and intraperitoneally 20 mg/kg/d with CTX;RRD+CTX group was given orally 0.4 mL/20 g/d with RRD and intraperitoneally 20 mg/kg/d with CTX once a day for 10 d. The expression of C-myc and Cath-D in tumor tissues was detected by immunohistochemistry. Results: RRD could significantly decrease the expression of C-myc and Cath-D in the tumor tissues of S180 tumor-bearing mice, and there was a significant difference between RRD and model group. Conclusion: The inhibitory effect of RRD on S180 tumor-bearing mice may be related to the inhibition of the expression of C-myc and Cath-D related proteins in tumor proliferation, invasion and metastasis.

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.

Inhibitory activity of polysaccharide extracts from three kinds of edible fungi on proliferation of human hepatoma SMMC-7721 cell and mouse implanted S180 tumor

AIM To determine the activities ofpolysaccharide extracts from Flammulina velutipes (Curt. ex Fr. ) Sing (FV), Lentinusedodes (LE) and Agaricus bisporus Sing (AB)on the proliferation of human hepatoma SMMC-7721 cells in vitro and on mouse implanted S-180tumors in vivo.METHODS The polysaccharide extracts were isolated from the fruit bodies of FV, LE and AB by the methods of hot-water extraction, Sevag’sremoval of proteins, ethanol precipitation,trypsin digestion and ethanol fractionalprecipitation. Human hepatoma SMMC-7721 cells were treated with 50 mg/L Polysaccharide extracts, and the mitosis index, mitochondria activity and cell proliferation were detected at different times in both control and experimental groups. The mice with S-180 implanted tumors were injected with the polysaccharide extracts at 24 mg/ kg body weight for 9 d and the tumorweight was measured on the 15th day.RESULTS The mitosis index of hepatoma cells in vitro could be significantly decreased by treatment with the polysaccharide extracts fromthe three kinds of edible fungi (P < 0 .005 ). Thecell numbers and mitochondria activity of SMMC7721 cells treated with polysaccharide extracts were lower than those in control groups (P <0.005). The inhibition rates of polysaccharide extracts against implanted S-180 tumors in mice were 52.8%, 56.6% and 51 .9% respectivelycompared with that in c0ntrol gr0ups.CONCLUSI0N The POIysaccharide extractsfrom the three kinds of edible fungi could inhibitnot only the Cultured malignant cells in vitfO butalso impIanted Sl80 tum0r i0 vivo.

Preliminary Validation of Tumor Cell Attachment Inhibition Assay for Developmental Toxicants With Mouse S180 Cells

This study was designed to explore the possibility of using ascitic mouse sarcoma cell line (S180) to validate the mouse tumor cell attachment assay for developmental toxicants, and to test the inhibitory effects of various developmental toxicants. The results showed that 2 of 3 developmental toxicants under consideration, sodium pentobarbital and ethanol, significantly inhibited S180cells attachment to Concanavalin A-coaed surfaces. Inhibition was dependent on concentration, and the IC50 (the concentration tha reduced attachment by 50% ), of these 2 chemicals was 1.2×10-3mol/L and 1 .0 mol/L, respectively. Anoher developmental toxiant, hydmiortisone, did not show inhibitory activity. Two non-developmental toxicants, sodium chloride and glycine were also tested and these did not decrease attachment rates. The main results reported here were generally sindlar to those obtained with ascitic mouse ovdrian tumor cells as a model. Therefore, this study added further evidence to the conclusion that cell specificity does not lindt attachment inhibition to Con A-coated surfaces, so S180 cell may serve as an altemative cell model, especially when other cell lines are unavailable. Furthermore, after optimal validation, it can be suggested that an S180 cell attachment assay may be a candidate for a series of assays to detect developmental toxicants.

Effects of Raspberry Root decoction on cytokine level and thymus and spleen index in S180 model mice

Objective: To observe the effects of RRD on serum levels of cytokines interleukin-2 (IL-2), interleukin-10 (IL-10) and thymus and spleen index in S180 mice, and to explore the mechanism of tumor inhibition by RRD. Methods: Fifty Kunming healthy mice, half male and half female, were randomly divided into five groups: normal control group, model control group, cyclophosphamide group (CTX group), red raspberry group (RRD group) and combined administration of red raspberry and cyclophosphamide group (RRD + CTX group), with 10 mice in each group only. The other 40 mice were injected with 0.2 mLS180 tumor suspension at the right axilla to make the model experiment, except 10 mice in the normal control group. The next day, the normal control group and model control group were given intragastric administration of 0.02 mL/g/d saline, CTX group was given intragastric administration of 0.4 mL/20 g/d saline and 20 mg/kg/d CTX, RRD group was given intragastric administration of 0.4 mL/20 g/d RRD, RRD+CTX group was given intragastric administration of 0.4 mL/20 g/d RRD and 20 mg/kg/d CTX for 10 d, once a day. Serum levels of IL-2 and IL-10 were measured by ELISA, and thymus and spleen indexes were measured. Results: Red raspberry rhizome decoction could increase serum IL-2 level (P < 0.05), decrease IL-10 level (P < 0.05), increase thymus index (P < 0.05) and decrease spleen index (P < 0.05) in S180 mice. Conclusion:The anti-tumor effect of the water decoction of red raspberry rhizome may be related to the regulation of immune suppression and the improvement of immune organ function of the tumor-bearing organism.

番茄红素对S_(180)荷瘤小鼠抗肿瘤作用的实验研究

目的 研究番茄红素 (LP)的体内抗肿瘤作用。方法 通过S1 80 肉瘤建立荷瘤小鼠模型 ,给予番茄红素后观察荷瘤小鼠肿瘤生长情况及对小鼠免疫系统和抗氧化酶的影响。结果 给药后能够增强脾脏淋巴细胞增殖能力 ,提高自然杀伤细胞 (NK)活性 ,可升高小鼠血清SOD、GSH Px活性 ,降低MDA含量 (P <0 0 5 )。结论 番茄红素具有明显的抗肿瘤作用 ,其作用可能是通过提高免疫系统功能和机体的抗氧化酶活力来实现的。

柴胡提取物对人肝癌细胞和小鼠S-180肉瘤的抑制作用

目的 :研究柴胡水提物对体外培养的人肝癌 SMMC-772 1细胞线粒体代谢活性、细胞增殖及小鼠移植性 S-1 80实体瘤的影响。方法 :中药柴胡 ( BCDC)经粉碎、浸提、超速离心、减压浓缩、冷冻干燥得柴胡提取物。人肝癌 SMMC-772 1细胞经不同浓度柴胡提取物处理不同时间后 ,检测了各实验组和对照组细胞的有丝分裂指数、细胞增殖及线粒体活性几方面的变化。S-1 80肉瘤小鼠连续 9d腹腔注射 3 3 .3 mg/ kg体重 BCDC提取物 ,停药 1 5d后 ,杀死小鼠称量瘤重。结果 :1经 3 55mg/ L BCDC提取物处理人肝癌 SMMC-772 1细胞 2 4 h,其线粒体活性为对照组的 50 .2 6% ,处理 72 h为 2 4 .82 %。2以 3 55mg/ L BCDC提取物处理 7d中 ,人肝癌细胞数分别是血清对照组( FCS)的为 57.5% ,4 5.88% ,3 7.0 6% ,2 8.3 7% ,2 0 .90 % ,1 2 .89% ,1 4.1 8% ;无血清对照组 ( NON)的 65.0 9% ,62 .2 4 % ,56.99% ,4 9.0 8% ,4 0 .78% ,2 6.78% ,2 8.4 1 %。 3经 BCDC提取物处理 2 4 h后 ,即使更换正常培养基 ,人肝癌细胞数在 96h的恢复培养中仍低于处理前的细胞数。 4有丝分裂指数实验组为 0 .3 0 ,对照组分别为 5.3和5.4 ( P<0 .0 0 1 )。 5BCDC提取物对小鼠 S-1 80实体瘤抑制率为 87.2 1 %。

新疆阿魏乙酸乙酯部位对小鼠S180实体瘤的抑制作用

目的:研究新疆阿魏药材乙酸乙酯部位对小鼠S180实体瘤的抑制作用。方法:将60只小鼠随机分为正常对照组,肿瘤模型组,阿魏乙酸乙酯部位低、中、高剂量组(1.0、2.0、3.0g/kg,ig),顺铂对照组(阳性药物,5mg/kg,iv),每组10只。除正常对照组外,其余各组小鼠接种经S180实体瘤侵染的小鼠的腹水以复制S180实体瘤动物模型。造模次日,各给药组小鼠给予相应药物,正常对照组、肿瘤模型组小鼠ig等体积生理盐水,每天1次,连续10 d。观察并测定各组小鼠体质量、脏器(脾、胸腺)指数、肿瘤体积变化趋势、实体瘤块体积和质量、肿瘤抑制率和病理变化;酶联免疫吸附法(ELISA)测定小鼠血清白细胞介素2(IL-2)、干扰素γ(IFN-γ)、肿瘤坏死因子α(TNF-α)水平。结果:与正常对照组比较,肿瘤模型组小鼠脾指数、TNF-α水平显著升高,IL-2、IFN-γ水平显著降低(P<0.05);肿瘤组织异型细胞呈团块状分布,伴有一定数量的缺血性坏死。与肿瘤模型组比较,顺铂对照组小鼠体质量、脾指数、胸腺指数、实体瘤块体积和质量显著降低,IL-2、TNF-α水平显著升高;阿魏乙酸乙酯部位各剂量组小鼠脾指数、TNF-α水平显著升高,实体瘤块体积和质量显著降低(P<0.05);病理观察肿瘤组织受到不同程度抑制,且顺铂对照组抑制程度最为显著,肿瘤细胞数量减少,伴有少量坏死和细胞浸润;顺铂对照组和阿魏乙酸乙酯部位低、中、高剂量组小鼠的肿瘤抑制率分别为(73.26±4.55)%、(40.34±3.45)%、(50.86±9.34)%、(58.20±3.70)%。结论:阿魏药材乙酸乙酯部位对小鼠S180实体瘤有抑制作用。

牛磺酸对小鼠移植瘤S_(180)肉瘤影响的研究

小鼠喂以基础饲料，对照组和实验组两组动物分别饮水和１％牛磺酸，进行下列实验：１．接种Ｓ１８０肉瘤后，各组又分为不注射环磷酰胺（ＣＴＸ）和注射环磷酰胺进行化疗两组。观察小鼠存活时间、肉瘤大小及抑瘤率。结果表明：补充牛磺酸的荷瘤小鼠存活时间（３５．７±２３．７）天，明显长于对照组（１８．７±５．６）天，抑瘤率为４２．２６％，牛磺酸与ＣＴＸ合用的小鼠生存至６１天仍无一例死亡，也未见到肉眼肿块，抑瘤率为１００％。对照组用ＣＴＸ小鼠存活时间（３９．８±１２．３）天，与未用ＣＴＸ小鼠无差别。２．小鼠接种艾氏腹水瘤瘤细胞后，观察瘤细胞的膜流动性。结果表明：接种艾氏腹水瘤后，牛磺酸组瘤细胞膜的荧光偏振度ｐ＝０．１０８±０．０２０、微粘度η＝０．６１８±０．１４０；而对照组ｐ＝０．１３９±０．０２０，η＝０．８７４±０．１５０，说明牛磺酸组细胞膜的流动性明显优于对照组（Ｐ＜０．０１）。３．以碳素廓清法和血清溶血素生成测定两组免疫功能。牛磺酸组小鼠的免疫功能也明显高于对照组（Ｐ＜０．０１）。以上结果证明：牛磺酸具有抑瘤效果，在用ＣＴＸ进行化疗时，具有明显的协同效应。其抑瘤效果可能与牛磺酸能加强机体免疫功能、保护细胞膜的稳定性和?

基因重组别藻蓝蛋白对小鼠S_(180)肉瘤的抑制作用

研究基因重组别藻蓝蛋白 (RAPC)的抑瘤作用 ,给皮下接种S180 瘤细胞的小鼠 ,每天分别ig及ipRAPC 13 4mg/kg ,6 7mg/kg和 3 4mg/kg ,共 10d ,第 11d处死小鼠 ,称瘤重和胸腺重 ,计数白细胞。结果表明 ,RAPC对小鼠S180 肉瘤有显著抑制作用 ,瘤重抑制率在 45 %～ 64 %之间 ,ig及ip均有效 ,对荷瘤小鼠的胸腺指数和白细胞数量无明显影响。

阿霉素在小鼠体内诱导S－180细胞株抗药性的实验研究

利用ＢＡＢＬ／ｃ小鼠，腹腔接种Ｓ－１８０瘤细胞，阿霉素腹腔注射治疗１５个周期培育传代，得到抗阿霉素的Ｓ－１８０细胞株（Ｓ－１８０Ｒ）。此抗药细胞对阿霉素的抗药性比亲本细胞提高６６倍。对典型的ＤＮＡ拓扑异构酶Ⅱ抑制刻ＶＰ１６（Ｅｔｏｐｏｓｉｄｅ）抗药性增加９倍。经免疫组化进一步证实，抗药细胞显示多药抗药基因（ＭＤＲｇｅｎｅ）产物Ｐ－１７０糖蛋白过表达。流式萤光细胞仪测试结果也表明抗药细胞比亲本细胞排出药物能力提高８９倍。可以肯定这是ＭＤＲ基因过表达产物所致。本工作为筛选有效逆转抗药功能的药物及其他治疗手段提供了有用的动物模型。

青蒿琥酯对小鼠肝癌及S_(180)实体瘤的抑制作用

目的 研究青蒿琥酯的抗肿瘤作用。方法 用移植性肝癌和S180 1∶1肿瘤组织生理盐水混悬液 ,每只小鼠腋窝皮下接种 0 .2ml ,2 4h后 ,肌肉注射青蒿琥脂 ,连续 10天。结果 青蒿琥酯 6 0mg/(kg·d)、30mg/(kg·d)和 15mg/(kg·d)对小鼠肝癌的抑瘤率分别为 39.79%～ 5 4.49%、37.79%～ 49.96 %和 40 .38%～ 5 3 .96 %。青蒿琥酯 10 0mg/(kg·d)、5 0mg/(kg·d)和 2 5mg/(kg·d) 对小鼠S180 的抑瘤率分别为 48.5 3 %～ 49.6 0 %、47.78%～ 5 7.96 %和 5 8.87%～ 6 8.5 7%。对 2种瘤株经重复实验 ,均有抑瘤作用。结论 青蒿琥酯对小鼠肝癌和S180

龙葵浓缩果汁对S_(180)荷瘤小鼠的抑瘤效应

目的 通过动物实验研究龙葵浓缩果汁对S180 荷瘤小鼠免疫器官的影响及其抑瘤作用。方法 采用S180荷瘤细胞种于小鼠右腋皮下,建立小鼠肿瘤模型;采用动物对比实验法将小鼠随机分成5个组:龙葵浓缩果汁:高剂量组(3 0 0 0mg/kg体重)、中剂量组(15 0 0mg/kg体重)、低剂量组(75 0mg/kg体重) ;肿瘤对照组和空白对照组。连续灌胃15d ,脱椎处死后观察小鼠体内瘤重、胸腺和脾脏重量。结果 ①实验组肿瘤明显小于肿瘤对照组(P <0 . 0 5 ) ,其肿瘤抑制率达到64 . 99% ,尤以高剂量组效果明显。②各实验组小鼠的脾脏重量明显高于肿瘤对照组(P <0 .0 5 )。结论 龙葵浓缩果汁具有抑制小鼠肿瘤生长作用。

有机锗多酸衍生物对S_(180)肿瘤细胞DNA合成的抑制作用

目的 探讨有机锗多酸衍生物对S1 80 肿瘤细胞DNA合成的抑制作用。方法 用3H TdR掺入法检测有机锗多酸衍生物在体外对S1 80 肿瘤细胞DNA合成的抑制作用 ,观察不同剂量有机锗多酸衍生物对S1 80 实体瘤的抑制作用和对免疫器官的影响。结果 体外实验表明 ,有机锗多酸衍生物对S1 80 细胞的生长具有明显的抑制作用 ,而且浓度越高 ,抑制作用越强。体内实验也表明 ,有机锗多酸衍生物对S1 80 实体瘤的生长具有抑制作用 ,而且剂量越大 ,抑制作用越强。且有机锗多酸衍生物可防止荷瘤鼠脾脏重量的下降。结论 有机锗多酸衍生物可抑制肿瘤细胞生长 。

软骨多糖对小鼠肉瘤细胞S_(180)抑制作用的实验研究

[目的]研究软骨多糖对S180荷瘤小鼠的生命延长率和抑瘤率的影响。[方法]以小鼠肉瘤S180细胞腹腔及皮下造模,设对照组﹑低剂量组﹑高剂量组3组,分别观察软骨多糖对各组小鼠的生存时间、生命延长率和抑瘤率的影响。[结果]高剂量组小鼠的生存时间为19.0天,生命延长率为25.0%,抑瘤率为73.5%,而低剂量组小鼠分别为16.5天,8.6%和27%。[结论]软骨多糖能有效抑制小鼠肉瘤S180细胞的生长,是一种新型的抑癌物质。

小鼠S_(180)肉瘤细胞热损伤的机制研究

目的 通过测定肿瘤细胞内游离钙离子浓度 ([Ca2 + ]i)及细胞膜脂流动性的变化 ,探讨肿瘤细胞热损伤的机制。方法 对体外培养的小鼠S180 肉瘤细胞进行高温 (4 3℃、60min)处理后 ,利用激光粘附式细胞仪测定肿瘤 [Ca2 + ]i的荧光强度及膜脂扩散系数 ,并观察细胞的形态学变化。结果 受热损伤的肿瘤 [Ca2 + ]i荧光强度为 (10 3 80± 14 0 9) ,比对照组的荧光强度 (94 3 4± 13 99)升高 (P <0 0 1) ;膜脂流动性为 (7 40± 6 84)× 10 -5cm2 /s ,比对照组的 (10 5 3± 6 92 )× 10 -5cm2 /s下降 (P <0 0 1) ;经高温处理后细胞形态学改变明显 ,肉瘤细胞变形、膜皱缩、不规整 ,胞质不均 ,有颗粒状物 ,细胞核散乱、有大量空泡 ,与对照组有明显区别。结论 高温使肿瘤细胞形态发生变化 ,改变了细胞膜的结构 ,导致[Ca2 + ]i升高 ,提示 [Ca2 +

复方抗瘤合剂抑制小鼠S_(180)肉瘤生长及对p53表达的影响

目的 探讨复方抗瘤合剂对小鼠S1 80 肉瘤的作用及机制。方法 复方抗瘤合剂根据中医补气、活血、清热解毒的原理拟成 ,将带有S1 80 鼠分成 6组 ,给药 1 0天后 ,据瘤重计算抑瘤率 ,用免疫组化SP法计算p53阳性细胞数。结果 以对照组为基数 ,(2 )、(5)、(6)组有不同程度的抑瘤率 (P <0 0 5或P <0 0 1 )和不同程度的p53阳性细胞数低于 (1 )组 (P <0 0 1 )。结论 复方抗瘤合剂对小鼠S1 80 肉瘤的生长具有一定的抑制作用 。

S_(180)肉瘤,艾氏腹水瘤肿瘤移植模型建立的研究

目的 应用小鼠S1 80 肉瘤 ,小鼠EAC腹水瘤实体型两种瘤株 ,进行BALB c小鼠、昆明小鼠两种动物移植瘤模型的研究。方法 试验共设BALB c小鼠模型组 ,BALB c小鼠阳性组 ,昆明小鼠模型组 ,昆明小鼠阳性组 ,比较给药 10d后实体瘤大小及其病理学变化特征。结果 BALB c小鼠较之昆明小鼠实验前后体重变化小 ,个体间瘤重差异小 ,其组内标准差占平均值的比例较小 ,肿瘤生长较均衡 ;与此同时 ,病理学观察模型组和阳性组间 ,瘤体切面积和瘤细胞坏死率差异均有极显著性 ,两模型组的小鼠肝脏内均发现有瘤细胞转移。

臭参对S_(180)荷瘤小鼠化疗增效减毒及免疫功能的影响

目的研究臭参对S180荷瘤小鼠化疗增效、减毒及免疫功能的影响。方法通过对S180荷瘤小鼠瘤质量及外周血象的检测,分别观察臭参与阿霉素及环磷酰胺合用对S180荷瘤小鼠的增效减毒作用;通过检测S180荷瘤小鼠血清溶血素及网状内皮系统吞噬功能,观察臭参对荷瘤小鼠免疫功能的影响。结果臭参能在一定程度上增强阿霉素或环磷酰胺的抑瘤作用以及减轻化疗药物对血液系统的毒副作用。臭参可增强荷瘤小鼠降低的免疫功能,还具有增强网状内皮系统吞噬功能的作用。结论臭参对荷瘤小鼠具有一定的化疗增效、减毒及免疫增强作用。