蛇毒心脏毒素对荷瘤小鼠的抗肿瘤作用初步研究

目的探讨蛇毒心脏毒素（ＣＴＸ）对荷瘤小鼠Ｓ１８０腹水瘤细胞生长抑制的影响。方法小鼠腹腔接种Ｓ１８０活瘤细胞,连续１０ｄ分别腹腔注射ＣＴＸ０．８ｍｇ／ｋｇ、０．４ｍｇ／ｋｇ、０．２ｍｇ／ｋｇ,分析统计荷瘤小鼠的体重变化和癌细胞死亡率,并用有丝分裂完全阻断法分析体内癌细胞的有丝分裂过程。结果ＣＴＸ各剂量组荷瘤小鼠的体重抑制和癌细胞死亡率均有明显的剂量反应关系,与对照组相比有显著的差异（Ｐ＜０．０１）;镜检发现ＣＴＸ能抑制体内癌细胞的有丝分裂,表现在０．４ｍｇ／ｋｇ和０．８ｍｇ／ｋｇ实验组腹水Ｓ１８０细胞处于有丝分裂前期和中期的细胞数量明显减少,其ＭＩ值分别为０．７１％和０．８０％,比对照组显著减少（Ｐ＜０．００１）。结论ＣＴＸ对Ｓ１８０小鼠体内癌细胞的生长有抑制和杀伤作用,并通过干扰和阻断癌细胞的有丝分裂过程,抑制腹水的生长。     

蛇毒心脏素对荷瘤小鼠的抗肿瘤作用初步研究

目的 探讨蛇毒心脏毒素（ＣＴＸ）对荷瘤小鼠Ｓ１８０腹水瘤细胞生长抑制的影响。方法 小鼠腹腔接种Ｓ１８０活瘤细胞,连续１０ｄ分别腹腔注ＣＴＸ０．８ｍｋｇ、０．４ｍｇ／ｋｇ、０．２ｍｇ／ｋｇ,分别统计荷瘤小鼠的体重变化和癌细胞死亡率,并用有丝分裂完全民法分析体内癌细胞的有丝分裂过程,结果 ＣＴＸ各剂量组荷瘤小鼠的体重抑制和癌细胞的有丝分裂,表现在０．４ｍｇ／ｋｇ实验组腹水Ｓ１８０细胞处于有丝分裂前期和     

眼镜蛇毒细胞毒素的抗肿瘤作用

目的　研究眼镜蛇毒细胞毒素（ Ｃ Ｖ Ｃ Ｔ Ｘ）的体内抗肿瘤作用。方法　小鼠皮下、腹腔接种 Ｓ１８０ 、 Ｅ Ａ Ｃ后, 于接种部位注射不同剂量的 Ｃ Ｖ Ｃ Ｔ Ｘ, 每天 １ 次, 连续１０ 天, 观察瘤重抑制率和生命延长率。结果　适当剂量（０２～０８ｍ ｇ／ｋｇ） 的 Ｃ Ｖ Ｃ Ｔ Ｘ 能明显抑制肿瘤的生长 （ Ｐ＜ ００１）,小鼠的存活时间明显延长（ Ｐ ＜ ００１）。结论　 Ｃ Ｖ Ｃ Ｔ Ｘ 在小鼠体内对 Ｓ１８０ 、 Ｅ Ａ Ｃ有明显地抗肿瘤作用。     

不同剂量的He—Ne激光对Raji细胞膜表面SH的影响

本文以离体培养的Ｒａｊｉ细胞为材料,采用ＥＬＬＭＡＮ方法检测了不同剂量的Ｈｅ－Ｎｅ激光对Ｒａｊｉ细胞膜表面ＳＨ含量的影响。发现０．５Ｊ／ｃｍ＾２Ｈｅ－Ｎｅ激光能量可明显增加膜表面ＳＨ含量（Ｐ〈０．０５）。大于或小于此剂量的Ｈｅ－Ｎｅ激光对膜表面ＳＨ含量的影响均不明显（Ｐ〉０．０５）。提示０．５Ｊ／ｃｍ＾２的激光能量对膜有刺激作用。     

C_(60)对小鼠S_(180)肉瘤光动力学作用模型的建立

为验证Ｃ６０对活体肿瘤的光动力学损伤作用,我们从两方面进行实验：Ｃ６０对荷瘤小鼠的Ｓ１８０实体瘤的光动力学杀伤作用和Ｃ８０对离体Ｓ１８０肿瘤细胞的光动力学杀伤作用,在小鼠的瘤体上注射Ｃ８０光敏剂,在５１１ｎｍ、５７８ｎｍ混合黄录色激光照射正派主发Ｃ６０,产生大量的单线态氧,杀伤活性肿瘤。激光光强为５００ｍＷ,Ｃ６０浓度为３０μｇ／ｍｌ时,荷瘤小鼠寿命平均延长５天,瘤径减小１ｃｍ,瘤重减轻０．８克,     

口服乐腹康胶囊活菌制剂对人体肠道菌群的影响

本文报道了口服乐腹康胶囊活菌制剂对正常人体肠道的双歧杆菌、乳杆菌、大肠杆菌等的影响。结果显示口服后,对肠道菌群有短暂（１～２天）抑制生长作用,而后对厌氧菌中的双歧杆菌、乳杆菌有明显促进生长的作用。双歧杆菌在服药前平均为５０６±１０３亿／克,服药后１０天升至１８７３±１４３亿／克,增长３７０倍（Ｐ＜００５）,有显著性差异。乳杆菌服药前平均数为２７４±０２５亿／克,服药后１０天升至５０７±１２１亿／克,增长１８５倍。而对需氧的大肠杆菌和其他肠道球菌有持续的抑制作用,大肠杆菌服药前平均数为３４２±０２１亿／克,服药后１０天降至１０５±００９亿／克,仅为原来的３０％（Ｐ＜００５）,有显著的差异     

绒毛膜促性腺素（hCG）对小灵猫泌香影响的研究

本文就绒毛膜促性腺素（ｈＣＧ）对小灵猫泌香的影响进行了研究。试验用药剂量为８７５ＩＵ／只。结果表明，试验组用药前６０天平均产香为４．５２±０．４８克／只，三次用药后（６０天）平均产香为７．５２±０．２８克／只，增产６６．４％；用药后试验组与对照组比较增产９１．３％。差异均显著（ｐ＜０．０５）。但ｈＣＧ不能活化小灵猫的擦香行为。     

丽珠肠乐对老年腹泻者肠道厌氧菌群、T淋巴细胞亚群、血清SOD及LPO的影响

本文应用双歧杆菌活菌制剂──丽珠肠乐治疗３０例老年腹泻患者。腹泻老年组治疗后与治疗前相比,治疗后外周血ＣＤ３、ＣＤ４、ＣＤ８及ＣＤ４／ＣＤ８比值均回升,ＣＤ４升高显著（Ｐ＜０．０１）,ＣＤ３相对升高（Ｐ＜０．０５）,ＣＤ４／ＣＤ８比值回升到正常水平（Ｐ＜０．０１）;血清ＳＯＤ活性亦升高到正常水平（Ｐ＜０．０１）,血清ＬＰＯ含量明显减低（Ｐ＜０．０５）;粪便中双歧杆菌、拟杆菌、乳杆菌数量显著升高（Ｐ＜０．０１）,Ｂ／Ｅ比值也随之升高（Ｐ＜０．０１）,而葡萄球菌和肠球菌数量明显减少（Ｐ＜０．０１和０．０５）．结果提示,丽珠肠乐对老年腹泻患者具有明显调整Ｔ淋巴细胞亚群免疫功能,提高血清ＳＯＤ活性,降低血清ＬＰＯ含量,扶植肠道厌氧菌群生长,改善肠道菌群紊乱的作用。     

不同剂量的He—Ne激光对Raji细胞膜脂流动性的影响

本文采用荧光偏振法检测了不同剂量的Ｈｅ－Ｎｅ激光照射法对Ｒａｊｉ细胞膜流动性的影响,发现了０．０１Ｊ／ｃｍ＾２和０．５１Ｊ／ｃｍ＾２两剂量可使膜脂微粘度降低（Ｐ〈０．０５）。即其膜脂流动性升高;１．０Ｊ／ｃｍ＾２和２．０Ｊ／ｃｍ＾２的剂量脂微粘度无明显影响,即其膜流动性无明显化（Ｐ〉０．０５）,而６．０２Ｊ／ｃｍ＾２的剂量可使膜微粘度明显上升（Ｐ〈０．０５）。即其膜流动性明显下降。     

不同波长激光辐照花生种子的生物学效应

本实验考察了Ｋ＋ｒ、Ａｒ＋、Ｎｄ：ＹＡＧ、ＨｅＮｅ和ＬＤ等不同波长的激光辐照对花生种子产生的生物学效应。结果显示,适当剂量不同波长的激光辐照都能促进花生种子生长。在辐照剂量为０．１２８ｗ／ｃｍ２×１８０ｓ的条件下,较短波长激光对花生幼苗的促进作用比长波长激光显著;在辐照剂量为１．２８ｗ／ｃｍ２×１８ｓ的条件下,短波长激光对花生种子的萌发及胚的生长有抑制作用,而长波长激光有促进效应。在相同辐照剂量条件下,不同功率密度与时间的组合其辐照效果不同。１．２８ｗ／ｃｍ２功率密度的Ｎｄ：ＹＡＧ（５３２ｎｍ）激光脉冲输出辐照对花生种子的生长产生显著的抑制作用。实验结果提示,要得到相同的辐照效果,长波长激光与短波长激光相比,必须提高辐照功率密度或加大辐照输出剂量。     

A lysine in the ATP-binding site of P130gag-fps is essential for protein-tyrosine kinase activity.

The P130gag-fps transforming protein of Fujinami sarcoma virus (FSV) possesses tyrosine-specific protein kinase activity and autophosphorylates at Tyr-1073. Within the kinase domain of P130gag-fps is a putative ATP-binding site containing a lysine (Lys-950) homologous to lysine residues in cAMP-dependent protein kinase and p60v-src which bind the ATP analogue p-fluorosulfonylbenzoyl-5' adenosine. FSV mutants in which the codon for Lys-950 has been changed to codons for arginine or glycine encode metabolically stable but enzymatically defective proteins which are unable to effect neoplastic transformation. Kinase-defective P130gag-fps containing arginine at residue 950 was normally phosphorylated at serine residues in vivo suggesting that this amino acid substitution has a minimal effect on protein folding and processing. The inability of arginine to substitute for lysine at residue 950 suggests that the side chain of Lys-950 is essential for P130gag-fps catalytic activity, probably by virtue of a specific interaction with ATP at the phosphotransfer active site. Tyr-1073 of the Arg-950 P130gag-fps mutant protein was not significantly autophosphorylated either in vitro or in vivo, but could be phosphorylated in trans by enzymatically active P140gag-fps. These data indicate that Tyr-1073 can be modified by intermolecular autophosphorylation.     

新型光敏化剂——竹红菌甲素的抑瘤作用

 利用竹红菌甲素并结合其光敏特性进行了动物体内的抑瘤试验。发现患瘤局部表皮涂布竹红菌甲素软膏或局部皮下注射或腹腔注射甲素花生油溶液、并经光照致敏后能使小鼠S-180实体肉瘤生长减缓,甚至有个别消退。同时利用细胞培养法和~3H标记化合物参入法进行了甲素抑瘤作用的定量分析。发现作用时间固定时(光照40分钟后继续培养3小时),大于12.5ng/ml浓度的甲素能明显抑制~3H-TdR、~3H-UR和~3H-Leu对S-180肉瘤细胞的参入速率;剂量与抑制率呈正相关。据此结果求出甲素对S-180肉瘤细胞的有效抑制浓度(LD(50))为40ng/ml。光照组与无光照组差异有显著性。用Ebrlich腹水癌细胞为研究体系也得到了类似的试验结果。实验结果提示竹红菌甲素具有明显的抑瘤作用,这种作用与其光敏特性有关。     

Antitumor activity of carminomycin antibiotic used orally]

Antitumor activity of karminomycin used perorally was studied with respect to 3 strains of mouse transplantable tumors, i. e. one ascitic strain of lymphadenosis NK/LI and two solid strains of lymphosarcoma L10-1 and sarcoma 180. Karminomycin was shown to have a high antitumor activity against the above tumors on its oral administration. In the experiments with lymphadenosis NK/LI the efficiency of karminomycin was higher when it was used perorally as compared to its intravenous administration. It was found that karminomycin had practically the same inhibitory effect on growth of lymphosarcoma L10-1 and sarcoma 180 on its peroral and intravenous administration in doses equivalent by their toxicity.     

Roles of arginine in growth of Clostridium botulinum Okra B.

Group I strains of Clostridium botulinum are known to degrade arginine by the arginine deiminase pathway. We have found that C. botulinum Okra B consumed a level of arginine (20 g/liter) higher than the basal requirement for growth (3 g/liter). Arginine was probably the preferred source of nitrogen for biosynthesis but did not serve as a major source of energy. Citrulline and proline were produced as major fermentation products in media containing high levels of arginine, but in media with basal amounts of arginine these products were produced in lower quantities during growth and were later reassimilated. The results indicate that C. botulinum Okra B changes its metabolism during consumption of surplus arginine, and this change is associated with toxin repression, formation of citrulline and proline as end products, and possibly resistance to environmental stresses such as increased acidity and osmolarity.     

Mycelial antineoplastic activity of Agaricus blazei

Basidiocarp of Agaricus blazei (=Agaricus brasiliensis; =Agaricus subrufescens) is used as teas or capsules due to its antineoplastic effect but there are few reports of using mycelium for this purpose. The objective of this study was to evaluate the antineoplastic activity on sarcoma 180 cells implanted in mice of two forms of preparation of the mycelium from two A. blazei strains grown in culture medium with different concentrations of isolated soy protein. Mycelia were grown in Pontecorvo medium with different concentrations of isolated soybean protein (ISP). Mycelial hot water extract, moistened mycelial powder, hot water extract of green tea, Ifosfamida^® (ifosfamide drug), and saline solution were administered daily by gavage in mice with sarcoma 180 cells to evaluate antineoplastic activity. It was concluded that antineoplastic activity was the same for both strains, except when used as moistened mycelial powder, which rules out the use of mycelial powder in capsules. Mycelial hot water extract had high antineoplastic activity with lower metabolic demand on the spleen and maintenance of normal blood parameters. Mycelial growth in different ISP concentrations had the same antineoplastic activity. Also the vegetative mycelium was as effective as the basidiocarp for sarcoma 180 tumor inhibition. Green tea was as effective as mycelial hot water extract.     

Epithelioid and fibroblastic rat kidney cell clones: epidermal growth factor (EGF) receptors and the effect of mouse sarcoma virus transformation.

Fibroblastic and epithelioid clones have been isolated from the normal rat kidney line, NRK. These clones were studied for their ability to bind epidermal growth factor (EGF), susceptibility to transformation by mouse sarcoma virus (MSV), and alteration in EGF binding upon sarcoma virus transformation. The epithelioid clones bound much more EGF than the fibroblastic clones; Scatchard plots on two of these clones, one epithelioid and one fibroblastic, showed that the higher EGF binding (1.3 x 10(5) molecules per cell for the epithelioid clone and 1.3 x 10(4) molecules per cell for the fibroblastic clone) was due to a greater number or receptors on the epithelioid cells rather than to a difference in the apparent affinity constant. When the clones were transformed by Moloney murine sarcoma virus the EGF binding decreased, the effect being greater with the fibroblastic clones. In 20 out of 20 independently isolated sarcoma virus transformed fibroblastic clones, the level of EGF binding was either greatly reduced or completely eliminated. In contrast to EGF, another growth factor, multiplication stimulating activity (MSA), bound to a greater extent to the fibroblastic clones than the epithelioid clones, and its binding was not decreased by sarcoma virus transformation. The results show that loss of EGF binding ability correlates with expression of the murine sarcoma virus transformation.     

Roles of arginine in growth of Clostridium botulinum Okra B.

Group I strains of Clostridium botulinum are known to degrade arginine by the arginine deiminase pathway. We have found that C. botulinum Okra B consumed a level of arginine (20 g/liter) higher than the basal requirement for growth (3 g/liter). Arginine was probably the preferred source of nitrogen for biosynthesis but did not serve as a major source of energy. Citrulline and proline were produced as major fermentation products in media containing high levels of arginine, but in media with basal amounts of arginine these products were produced in lower quantities during growth and were later reassimilated. The results indicate that C. botulinum Okra B changes its metabolism during consumption of surplus arginine, and this change is associated with toxin repression, formation of citrulline and proline as end products, and possibly resistance to environmental stresses such as increased acidity and osmolarity.     

Dietary arginine influences Rous sarcoma growth in a major histocompatibility B complex progressor genotype.

L-Arginine (L-Arg) can serve as a substrate for the production of reactive nitrogen intermediates. One of these metabolites, nitric oxide, has been shown to possess significant antitumor properties in vitro. To investigate the importance of this system in vivo, we have examined the dietary L-Arg host tumor interaction in the chicken. Since chickens are incapable of de novo L-Arg synthesis, concentration of this amino acid is readily controlled by diet. Line UNH 105 New Hampshire chickens having the major histocompatibility complex genotype, B24/B24, were used to study in vivo effects of dietary L-Arg on Rous sarcoma growth. After 5 weeks on a standard diet, 119 chicks were fed either a basal (0.92% L-Arg) diet or a high arginine (2.40% L-Arg) diet. One week later, chicks were wing-web inoculated with subgroup A Rous sarcoma virus. Tumor growth was monitored weekly for 12 weeks after inoculation. Plasma L-Arg levels and body weights from birds on each dietary treatment were analyzed. Neither body weight gains nor latent period for tumor development was affected by diet. However, plasma L-Arg levels were significantly different between dietary treatments (basal, 0.245 +/- 0.01 mumol/ml; high, 0.738 +/- 0.03 mumol/ml). In addition, mean tumor size scores were significantly (P less than 0.05) lower over time in chickens fed the high L-Arg diet. The results suggest that dietary L-Arg in excess of the amount required for growth reduces tumor load.     

超强静磁场联合环磷酰胺对S180荷瘤小鼠抗肿瘤和相关生理指标的影响

实验探讨了超强静磁场(ultra strong static magnetic field,USMF)联合环磷酰胺(cyclophosphamide,CTX)连续处理,对S180荷瘤小鼠抗肿瘤、抗氧化、免疫及骨髓抑制等方面的影响。对S180肉瘤小鼠分组处理后,剥取肉瘤组织称重并进行病理检验。检测过氧化氢酶、超氧化物歧化酶和谷胱甘肽过氧化物酶的活力、总抗氧化能力,以及肝脏和肾脏中丙二醛的含量、脾脏和胸腺指数、脾脏淋巴细胞转化率、外周血中的白细胞数目和骨髓细胞的DNA含量。腹水瘤小鼠同样处理后正常饲养,记录生存时间。结果发现,USMF+CTX组的抑瘤率(72.5%)比CTX组(51.5%)提高了40.8%,生命延长率提高了1.5倍,抗氧化和免疫能力也有一定程度的增强。表明USMF结合CTX,可以协同性抑制S180荷瘤小鼠肿瘤的生长,并减轻CTX对小鼠的副作用。     

藻蓝蛋白的抑瘤活性及抗氧化作用的研究

目的:观察藻蓝蛋白(phycocyanin,PC)对接种S180肉瘤小鼠的肿瘤生长及抗氧化功能的影响。方法:昆明小鼠随机分为6组(10只/组)。即模型组、PC低、中、高、最高剂量组(25,50,100,200mg/kg·d)、环磷酰胺组(CY对照组)。各组小鼠右前腋窝皮下接种S180肉瘤细胞,第二天除模型组外,其余5组分别以不同剂量的PC灌胃、CY(40mg/kg·d)腹腔注射,15天后处死,完整剥离出肿瘤,称重,计算抑瘤率;测定血浆中SOD活力、MDA含量及红细胞溶血度。结果:1.除PC低剂量组外,中、高、最高剂量组肿瘤生长比模型组显著缓慢(P<0.01),抑瘤率分别为34.8%、56.9%、68.4%、61.9%。2.PC高、最高剂量组可升高小鼠血浆中SOD酶的活力(P<0.05);PC各剂量组均能降低小鼠血浆中MDA的含量,最高剂量组与模型组比较有统计学意义(P<0.05),PC低、中、高剂量组与模型组比较有显著差异(P<0.01)。3.除PC低剂量组外,中、高、最高剂量组均能降低红细胞溶血度(P<0.05),其中高剂量组与模型组比较有显著差异(P<0.01)。结论:PC各剂量组可以抑制小鼠S180肿瘤...