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1.
研究马尾松树皮提取物(MPBE)体外和体内的抗肿瘤作用。采用四甲基偶氮唑蓝比色(MTT)法观察MPBE对人结肠腺癌细胞株LoVo的体外抑制作用,采用小鼠移植性肿瘤模型考察MPBE对S180荷瘤小鼠的抑瘤作用和艾氏腹水癌(EAC)小鼠的生命延长作用。结果表明:MPBE对Lo-Vo细胞的生长有较强的抑制作用,在质量浓度为500 mg/L时,MPBE对LoVo细胞作用24、48和72 h时的抑制率分别为19.83%、33.06%和58.15%;MPBE对小鼠S180肉瘤生长表现出明显的抑制作用,MPBE 50、100和200 mg/kg 3个剂量的抑瘤率分别为30.3%、37.8%和42.3%,MPBE达到200 mg/kg剂量时,反映免疫功能的胸腺指数和脾指数也明显增加;但MPBE对EAC腹水癌小鼠的生存时间没有明显的延长作用。 相似文献
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银杏叶聚戊烯醇对小鼠免疫功能和诱导肿瘤细胞凋亡的研究 总被引：8，自引：0，他引：8
用不同剂量银杏叶聚戊烯醇(GP)给正常小鼠和荷瘤小鼠灌胃,用碳粒廓清法分析正常小鼠巨噬细胞吞噬功能;采用流式细胞术(FCM)检测S180荷瘤小鼠的凋亡细胞比率(APO)、S期细胞比率(SPF)和增殖指数(PI)的变化,分析T细胞亚群CD4/CD8比值的影响.结果表明,10和20 mg/kg的GP能提高正常小鼠巨噬细胞的吞噬功能, 对碳粒的清除作用高于环磷酰胺(CTX);高剂量组(40 mg/kg)GP与对照组比较,能增加肝癌(Heps)荷瘤小鼠胸腺指数和艾氏腹水癌(EC)荷瘤小鼠脾指数.5 mg/kg GP对S180荷瘤小鼠细胞的APO为6.35, 明显高于阴性对照组及其它给药组,使S180荷瘤小鼠CD4/CD8比值接近正常小鼠. 相似文献
3.
从雷蘑AS 5.105深层发酵的滤液中分离得到胞外粗多糖CGP,以KM系S180荷瘤小白鼠为实验模型,用免疫器官重量法,进行高、中、低剂量CGP的腹腔注射实验。结果表明,CGP具有较高的抑瘤活性,并与剂量呈显著相关性;高剂量组与对照组相比较,小白鼠胸腺指数和脾脏指数均有显著增加,P<0.05;与低剂量组相比较,脾脏指数有显著增加,P<0.05。表明CGP能明显提高小白鼠的免疫功能。 相似文献
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银杏叶聚戊烯基磷酸酯体内外抗肿瘤的生物活性研究 总被引：1，自引：0，他引：1
研究了聚戊烯基磷酸酯(PPH)体外对肿瘤细胞和体内抗移植性肿瘤的抑制作用。从银杏叶中分离制备聚戊烯醇混合物(C75~C110),选择POC l3为磷酰化剂和三乙胺为碱性水解剂,经过磷酰化和水解二步反应,合成聚戊烯基磷酸单酯。以氟脲嘧啶(5-Fu)为对照,体外肿瘤细胞株选择SGC-7901人胃癌、LoVo人结肠腺癌和Hela人宫颈癌;体内移植性肿瘤细胞株选择肝癌实体型(Heps)、肉瘤(S180)、艾氏癌实体(EC),用不同剂量的PPH进行抗肿瘤药效实验。结果表明,银杏叶PPH在高浓度下(0.4 g/L)作用72 h,对3种体外细胞株抑瘤率达到60%~80%;对Heps、S180和EC等移植性瘤株抑瘤率达到50%~65%。这说明银杏叶PPH具有明显的抑制肿瘤的生物活性。 相似文献
6.
探讨了松乳菇多糖对机体免疫功能的影响,以高、中、低浓度的松乳菇多糖为材料,分别以免疫器官重量法、碳粒廓清实验法、抗应激能力实验和耐高温实验对小白鼠进行非特异性免疫试验.结果表明:高浓度组与对照组相比较,小白鼠胸腺指数和脾脏指数均有显著增加(p<0.05),与低浓度组相比较,脾脏指数有显著增加(p<0.05);高浓度组与对照组、低浓度组相比较其吞噬系数有显著增加(p<0.05);高浓度组与对照组相比游泳时间上有显著增加(p<0.05);各浓度松乳茹多糖对提高小白鼠耐高温能力不明显.松乳菇多糖能明显提高小白鼠的免疫功能. 相似文献
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以林檎叶的水提取组(A)、乙醇提取经石油醚萃取后分成的石油醚组(B)和乙醇提取组(C)、C组加HCl溶解后得到的(D)组、酸不溶物经乙酸乙酯溶解经NaOH萃取得NaOH萃取组(E)、乙酸乙酯萃取组(F)及石油醚提取组(G)为受试物,用小鼠免疫器官重量法、小鼠常压耐缺氧实验、小鼠游泳实验、小鼠耐高温、耐低温实验和小鼠碳粒廓清法实验,探讨了林檎叶不同成分对机体免疫功能的影响.结果表明:A组比对照组小鼠胸腺指数和脾脏指数均有显著增加(P<0.05),C组比对照组胸腺指数有显著的增加(P<0.05);C组浓度增加对胸腺指数有极显著的影响(P<0.01),脾脏指数与对照相比有显著差异(P<0.05);A组廓清指数、吞噬活性均比对照有明显提高(P<0.05);A、C、D与对照组比较能显著延长小鼠耐缺氧时间(P<0.05);C、D、E组比对照组延长小鼠耐低温时间(P<0.05);D组比对照能延长小鼠游泳时间(P<0.01);受试物均无明显提高小鼠的抗高温能力.林檎叶的水提取物和乙醇提取物能明显提高小鼠的免疫功能. 相似文献
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探讨枸杞多糖（LBP）对小鼠体内外免疫巨噬细胞功能的影响。本研究分别通过小鼠碳粒廓清实验、直接对小鼠原代单核巨噬细胞进行刺激和MTT比色的方法来研究枸杞多糖（LBP）对小鼠体内外单核免疫巨噬细胞的影响。 相似文献
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沙棘果油的抗炎的作用和对免疫功能影响的实验研究 总被引：1，自引：0，他引：1
沙棘果油PO对小白鼠巴豆油耳部炎症及醋酸腹膜炎皆有明显抗炎作用;能促进小鼠巨噬细胞吞噬功能,增加脾脏重量和脾指数;可促进小鼠脾脏空斑形成细胞（PFC）的含量,促进体内溶血素的形成;并能促进小鼠E－玫瑰花结的形成,及促进PHA刺激的淋巴细胞转化功能。提示沙棘果油对小鼠的非特异免疫功能,体液免疫和细胞免疫功能均有明显的促进作用。 相似文献
11.
Immunomodulatory activity in vitro and in vivo of polysaccharide from Potentilla anserina 总被引：1，自引：0，他引：1
Jiong-Ran Chen Zhi-Qiang Yang Ting-Jun Hu Zuo-Ting Yan Ting-Xian Niu Ling Wang Dong-An Cui Meng Wang 《Fitoterapia》2010,81(8):1117-1124
The polysaccharide (PAP) from Potentilla anserina was evaluated for modulating effects by using mouse peritoneal macrophage and the immunosuppressed-model cyclophosphamide-induced. Phagocytotic and mononuclear phagocytic system function assays showed that PAP stimulated the phagocytosis of phagocyte. Splenocyte proliferation assay showed that PAP acted the effect combining Con A or LPS in splenocyte proliferation. The parameters detected showed that PAP increased thymus and spleen indices, the levels of LDH and ACP in the spleen, and IL-10and IFN-γ in serum in immunosuppressed mice. The results suggest that PAP is involved in immunomodulatory effects leading to the exploration for PAP as a potential immunostimulant. 相似文献
12.
《Fitoterapia》2014
Neuroblastoma is the most common extracranial pediatric solid tumor with poor prognosis in children with disseminated stage of disease. A number of studies show that molecules largely distributed in commonly consumed fruits and vegetables may have anti-tumor activity. In this study we evaluate the effect of Citrus bergamia (bergamot) juice (BJ) in vitro and in a spontaneous metastatic neuroblastoma SCID mouse model. Qualitative and quantitative characterizations of BJ flavonoid fractions were performed by RP-HPLC/PDA/MS. We show that BJ significantly affects SK-N-SH and LAN-1 cell proliferation in vitro, but fails to reduce primary tumor weight in vivo. Moreover, BJ reduced cell adhesiveness and invasion of LAN-1 and SK-N-SH cells in vitro and the number of pulmonary metastases under consideration of the number of tumor cells in the blood in mice inoculated with LAN-1 cells in vivo. These effects without any apparent sign of systemic toxicity confirm the potential clinical interest of BJ and lay the basis for further investigation in cancer. 相似文献
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Prostate cancer is the fifth most common neoplasm worldwide, and the second most common cancer among men. Ginsenosides, the main component of ginseng, have been known for their medicinal effects such as anti-inflammatory and anti-proliferative activities. In this study, we investigated the inhibitory effects of ginsenosides (ginsenoside 20(R)-Rh2 and ginsenoside 20(S)-Rh2) on prostate cancer cells in vitro. Only ginsenoside 20(S)-Rh2 showed proliferation inhibition on androgen-dependent and -independent prostate cancer cells. These results implied that the stereochemistry of the hydroxyl group at C-20 may play an important role in antitumor activities. 相似文献
14.
本文报道了在昆明地区女贞、白蜡树和小叶女贞三种不同寄主植物上白蜡虫的泌蜡状况。试验结果表明,通过在三种寄主树上放养昆明种虫和昭通种虫,不同寄主的雄虫个体平均泌蜡量,单头种虫产蜡量因种虫和寄主不同而不同;白蜡虫在不同寄主上泌蜡存在高峰期,泌蜡高峰期因寄主和种虫不同而异;白蜡虫历时基本上不受寄主的影响,在３种寄主上大致相同。用白蜡虫雄虫个体平均泌蜡量、单头种虫产蜡量和泌蜡历时等指标衡量,在昆明地区,女贞是白蜡虫的优良寄主。 相似文献
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《Fitoterapia》2013
The tea seed triterpene saponin (TS) from Camellia sinensis was found to exhibit better antitumor activity in vivo in S180 implanted ICR mice and QR inducing activity for hepa lclc7 cells respectively compared with the total tea seed saponin (TTS), hydrolysate of the TTS and tea seed flavonoid glycosides (TF). By bioassay-guided isolation, the TS fraction was separated and seven major components were purified and identified as theasaponin E1 (1), theasaponin E2 (2), theasaponin C1 (3), assamsaponin C (4), theasaponin H1 (5), theasaponin A9 (6), and theasaponin A8 (7), among which compounds 4 and 5 were isolated from this genus for the first time. The antitumor bioassay of the isolated compounds showed that compounds 1, 2 and 3 exhibited potential activities against the human tumor cell lines K562 and HL60. Furthermore, compound 1 (the major constituent with a mass content of over 1%) showed significant QR inducing activity with an IR value of 4.2 at 4 μg/ml. So it can be concluded that tea seed especially the compound 1 (theasaponin E1) could be used as an antitumor agent and a chemoprevention agent of cancer. The preliminary structure–activity relationship in the anti-tumor activity and QR inducing activity of tea saponins was discussed briefly. 相似文献
16.
Zhang Yu Gu Ming Wang Kaiping Chen Zhixiang Dai Liquan Liu Jingyu Zeng Fang 《Fitoterapia》2010,81(8):1163-1170
A water-soluble polysaccharide LT1 was isolated from the basidiocarps of Lentinus edodes by hot water extraction and ethanol precipitations, further purified by gel chromatography. The Mw of LT1 was estimated to be 642 kDa by using HPGPC. Chemical and spectroscopic studies illustrated that LT1 has a backbone chain composed of 1 → 4-linked and 1 → 3-linked glucopyranosyl residues and has branches of single glucosyl stubs at C-6 of β-(1 → 4)-linked glucopyranosyl. AFM and Congo-red test revealed that LT1 existed as triple helix chain in 0.10 M NaOH solution or distilled water. Our studies showed that LT1 presented significant antitumor bioactivities on Sarcoma180 solid tumor cell implanted in BALB/c mice, which implies that LT1 could be potentially applied as a natural antitumor drug. 相似文献
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[目的]探讨外源保幼激素类似物(JHA)对白蜡虫泌蜡和发育的影响。[方法]使用高、中、低浓度保幼激素类似物经喷施、涂干、注射处理白蜡虫2龄雄幼虫。[结果]表明:白蜡虫2龄雄幼虫经外源中等浓度保幼激素类似物(2.5 mg·m L-1)喷施处理可以显著提高白蜡虫2龄雄幼虫的个体泌蜡量,昆明地区增产率平均可达41.50%,峨眉地区增产率平均达25.56%;但此方法在2地区之间表现出差异性,原因可能与两地种虫来源所处的生态环境差异有关。在中、低浓度范围内,JHA对白蜡虫蛹体质量表现出促进作用,高浓度表现出抑制作用;JHA对蛹体长的抑制随着外源保幼激素浓度的增加而增强;外源保幼激素类似物还可以提高白蜡虫蛹的羽化率,羽化率达62.70%~81.62%。[结论]中浓度JHA(2.5 mg·m L-1)喷施处理2龄雄幼虫显著提高白蜡虫泌蜡量;白蜡虫蛹的体长与JHA浓度之间存在一定的负相关性;白蜡虫蛹的体质量表现出低浓度促进,高浓度抑制;喷施和涂干处理,高浓度可显著提高白蜡虫蛹的羽化率;白蜡虫蛹的羽化可能并不受其体质量和体长的影响。 相似文献
18.
Antitumor activities of water extract (fraction A), ethanol extract (fraction B), ethyl acetate extract (fraction C), non-ethyl acetate extract (fraction D) and compound diosbulbin B isolated from Dioscorea bulbifera L. (DB) were investigated in vivo in this present study. The results showed that fractions B and C both decreased tumor weight in S180 and H22 tumor cells bearing mice, while fractions A and D had no such effect. Furthermore, fraction C altered the weight of spleen and thymus, and the amounts of total leukocytes, lymphocytes and neutrophils in tumor-bearing mice. Further results showed that compound diosbulbin B demonstrated anti-tumor effects in the dose-dependent manner at the dosage of 2 to 16 mg/kg without significant toxicity in vivo. Furthermore, on the basis of chemical analysis of the above extracts by high-performance liquid chromatography (HPLC) with a diode array detector (DAD), diosbulbin B was found to be the major antitumor bioactive component of DB. These results suggest that DB has potential anti-tumor effects which may be related to influencing the immune system for the first time, and the compound diosbulbin B is the major antitumor component of DB. 相似文献
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Chelerythrine (CHE), a quaternary benzo[c]phenanthridine alkaloid, which is an agent in traditional Chinese medicine exhibits a wide spectrum of pharmacological effects. In this study, we examined the anti-inflammatory activities and mechanism of CHE in vivo and in vitro, respectively. Further, in the analgesic test, CHE also showed pronounced inhibition of the acetic acid-induced writhing response. These results clearly suggested that CHE is a bioactive agent which has a significant anti-inflammatory action, which may be relevant to the inhibition of the release/production of exudates and prostaglandin E2 mediated through cyclooxygenase-2 regulation. 相似文献