共查询到19条相似文献,搜索用时 93 毫秒
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毛蜂窝菌提取物体外抗肿瘤活性的研究 总被引:1,自引:0,他引:1
以人肺癌细胞NCI-H460、中枢神经系统癌细胞SF-268及乳腺癌细胞MCF-7为供试细胞株,采用MTT(四甲基偶氮唑盐)法对毛蜂窝菌(Hexagona apiaria)野生子实体、栽培子实体、培养废料、发酵菌丝体的醇提物和发酵液乙酸乙酯萃取物、发酵液水相部分等各提取物进行了体外抗肿瘤活性研究.结果表明,毛蜂窝菌发酵液乙酸乙酯萃取物对三种肿瘤细胞株都有较明显的抑制作用,抑制率达80%以上;其它提取物也有一定的抑制作用,但抑制率在40%以下. 相似文献
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双向固体发酵后雷公藤菌质化学成分研究 总被引:4,自引:0,他引:4
目的:在前期药理实验基础上,分析双向性固体发酵后雷公藤菌质的化学成分。方法:采用高效液相色谱法和薄层色谱法,研究雷公藤药材和不同发酵时间药性菌质的化学成分动态变化规律。结果:药性菌质的雷公藤甲素含量低于原药材低;分别在218nm和250nm波长下,高温灭菌药材和发酵30d的药性菌质的液相图谱有3处明显的变化;乙酸乙酯提取物的薄层层析发现有一蓝色斑点为发酵后新增成分,而甲醇提取物薄层层析发现有2个斑点随发酵时间的延长含量降低。结论:雷公藤经药用真菌发酵后化学成分发生变化,其中一些化学成分的变化规律与药理实验结果存在相关性,可作为发酵终点判断标准。 相似文献
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灵芝抗肿瘤作用的研究现状 总被引:11,自引:0,他引:11
灵芝抗肿瘤作用的研究现状(解放军农牧大学农学系长春130062)殷勤燕癌症现已成为世界医学极为关注的难题。各种治疗、预防途径正在加紧研究着。其中免疫疗法由于其以刺激宿主的免疫系统达到防癌抗癌治愈疾病的目的,又无任何毒副作用,成为更为优越的治疗方法。真... 相似文献
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灰树花提取物补益作用的研究 总被引:4,自引:0,他引:4
灰树花提取物补益作用的研究沈玲玲,郑一凡,董幸纾(浙江医科大学杭州310031)根据前期文献综述,推测灰树花与其类似真菌一样具有“扶正固本”之功效,其性味“甘、平”,可通过“益气健脾、补虚扶正”发挥其补益作用。为验证这一推理,本文按中药药理实验方法对... 相似文献
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目的:研究桦褐孔菌菌质不同溶剂提取组分对α-淀粉酶、α-葡萄糖苷酶的抑制作用。方法:将桦褐孔菌菌质醇提后分别梯度萃取获得石油醚、乙酸乙酯、正丁醇和水提物,将残渣沸水浸提醇沉得粗多糖;将获取的各活性组分分别用于α-淀粉酶和α-葡萄糖苷酶抑制活性的测定,同时与桦褐孔菌菌核进行比较。结果:桦褐孔菌菌质和菌核各组分对α-淀粉酶、α-葡萄糖苷酶均有一定的抑制作用,且随其质量浓度的递增而增强(其中石油醚提取组分的抑制率为0);菌质和菌核粗多糖组分对这两种酶的抑制作用明显优于各自的其它组分(P0.01);菌质粗多糖对这两种酶的抑制率比菌核粗多糖低(P0.05)。结论:运用双向固体发酵技术获得的桦褐孔菌菌质粗多糖有较好的抑制α-淀粉酶和α-葡萄糖苷酶的作用。 相似文献
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依次用95%乙醇和蒸馏水提取山茶靛牛肝菌(Boletus pseudoregius)子实体,再用不同有机溶剂萃取95%乙醇提取物,考察山茶靛牛肝菌子实体不同有机溶剂萃取物和水提物的体外抗肿瘤活性.结果表明:石油醚萃取物对白血病细胞K562抑制作用较弱,对人肠癌细胞SW620和人肝肿瘤细胞HepG-2的增殖有较强的抑制作用,IC50分别为95.7和195.4 μg/mL;正丁醇萃取物对K562、SW620和HepG-2的增殖都有较强的抑制作用,IC50分别为24.2、89.0和59.6 μg/mL;石油醚和正丁醇萃取物在实验浓度范围内对人正常前列腺基质永生化细胞WPMY-1的增殖无抑制作用;氯仿和乙酸乙酯萃取物对K562、SW620和HepG-2肿瘤细胞和WPMY-1正常细胞的增殖均有较强抑制作用,其中氯仿萃取物的抑制作用最强;水提物对以上3种肿瘤细胞抑制作用不明显,对正常细胞的增殖无抑制作用. 相似文献
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通过戊巴比妥钠睡眠试验和免疫作用试验(迟发型超敏反应和碳粒廓清),研究蜜环菌提取物对试验小鼠睡眠改善影响和免疫调节作用。睡眠试验结果表明蜜环菌提取物,对增加戊巴比妥钠诱导睡眠时间有正相关作用,小鼠入睡率也有明显提升,还可以巴比妥钠睡眠潜伏期有较为明显的降低,说明蜜环菌提取物对于改善小鼠睡眠起到了积极作用。免疫试验结果表明蜜环菌提取物可以加大迟发型超敏反应,在碳粒廓清试验中,同样可以让小鼠关键免疫细胞参数上升,可以说明蜜环菌提取物也提高了小鼠的免疫调节作用。 相似文献
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以福建泰宁县的雷公藤、厚朴、杉木、马尾松为试验材料,将雷公藤纯林作为对照、厚朴/雷公藤(处理1)、杉木/雷公藤(处理2)、马尾松/雷公藤(处理3)为3种套种模式,研究不同套种模式下林地土壤养分的动态变化,并对土壤养分及雷公藤叶片光合特性进行相关性分析,以期筛选出适合当地且能产生最大效益的雷公藤套种模式。结果表明:厚朴林下套种雷公藤模式可显著提高雷公藤林地土壤的全氮、全钾、水解氮、速效钾、有机质的积累,含量分别增加了10.49%、3.98%、21.22%、31.31%和47.58%;杉木林套种雷公藤模式可使土壤的有效磷和有机质含量增加47.18%和25.11%,土壤的全氮、水解性氮、全钾和速效钾含量分别降低10.33%、12.48%、8.38%和7.29%;而马尾松林下套种雷公藤模式仅使林地土壤的全磷和有机质含量增加13.88%和16.10%;厚朴林下套种雷公藤的叶片最大净光合速率(Pnmax)、光饱和点(LSP)、光补偿点(LCP)以及表观量子效率(AQY)均最高,说明此种模式下雷公藤有较强的弱光适应能力,光合潜能最高,物质积累量多;处理1的净光合速率与土壤的全氮... 相似文献
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以牛蒡根为发酵基质,初步探究灵芝固体发酵所获菌质中多种化学成分的变化。利用可见分光光度计、高效液相色谱仪及定氮仪等测定了牛蒡根原药材和牛蒡根灵芝菌质中多糖、总三萜酸、总黄酮、核苷及蛋白质含量,并进行HPLC指纹图谱分析。牛蒡根经灵芝菌丝体发酵后,多糖含量由9.94%降低至2.76%,总三萜酸含量从无升高至0.14 mg·g-1,总黄酮含量由3.47%降低至0.34%,4种核苷总量由861.05μg·g-1升高到1 113.49μg·g-1,且新合成了腺苷,蛋白质含量由13.38%升高至17.28%。HPLC指纹图谱显示牛蒡根在灵芝发酵前后化学成分差异较大。灵芝固体发酵使牛蒡根多糖和黄酮含量降低,核苷和蛋白质含量升高,并新产生三萜酸和腺苷,具有明显的生物转化作用。 相似文献
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微域环境及外源物质对苹果果实5'- 核苷酸酶活性的影响 总被引:1,自引:1,他引:1
果实所处的微域环境对果皮组织中5'- 核苷酸酶活性有很大影响。无论套袋与否, 均以树冠西南方位果实的酶活性最高。由于套袋提高了微域环境温度, 果实5'- 核苷酸酶活性均显著高于不套袋处理。不同类型果袋所形成的微域环境不同, 对果实5'- 核苷酸酶活性影响的效应有异。在一定范围内, 缓慢持续升温或起伏升温都有利于果实5'- 核苷酸酶活性的提高, 但如果升温时间太短, 或温差变化太大,则不利于酶活性的提高。果实在35℃、40℃或48℃处理温度下, 高湿状态均有利于果实5'- 核苷酸酶活性的提高。4种外源活性氧处理均使果实5'- 核苷酸酶活性显著下降, 而外源CaCl2处理果实酶活性比对照提高了55.39%。 相似文献
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AIM To investigate the effects of Triptergium wilfordii multiglucoside (TWM) on intestinal flora and immune function in IgA nephropathy (IgAN) rats based on core 1 β1,3-galactosyltransferase (C1GALT1) and its chaperone protein Cosmc (C1GALT1/Cosmc pathway). METHODS The rat model of IgAN was established, and the animals were randomly divided into model group (IgAN group), dexamethasone (Dex) group and TWM group. Normal rats served as normal control (NC) group. The levels of serum creatinine (SCr) and blood urea nitrogen (BUN), 24-hour urinary total protein (24 h UTP) and the number of urinary red blood cells were measured by automatic biochemical analyzer. The levels of serum IgA1, and plasma tumor necrosis factor-α (TNF-α), B-cell activating factor (Baff) and interleukin-17 (IL-17) were detected by ELISA. The level of galactose-deficient IgA1 (Gd-IgA1) was detected by Vicia villosa lectin affinity ELISA. The intestinal colony was cultured in selective bacterial medium. The ratio of CD4+ CD25+ regulatory T cells (Treg) to CD4+ T cells (Treg proportion) in peripheral blood mononuclear cells (PBMC) was detected by flow cytometry.Western blot was used to determine the protein expression of C1GALT1 and Cosmc in intestinal mucosa. RESULTS Compared with NC group, 24 h UTP, the number of urinary red blood cells, SCr, BUN, serum IgA1 and Gd-IgA1, the numbers of Enterobacteriaceae , Enterococcus and Bacteroides , and the levels of TNF-α, Baff and IL-17 in plasma in IgAN group were significantly increased (P <0.05), while the numbers of Bifidobacteria and Lactobacilli , the Treg proportion in PBMC, and the protein expression levels of C1GALT1 and Cosmc in intestinal mucosa were significantly decreased (P <0.05). Compared with IgAN group, 24 h UTP, the number of urinary red blood cells, SCr, BUN, serum IgA1 and Gd-IgA1, the numbers of Enterobacteriaceae , Enterococcus and Bacteroides , and the levels of TNF-α, Baff and IL-17 in plasma in Dex group and TWM group were significantly reduced (P <0.05), and those in TWM group were lower than those in Dex group (P <0.05). Moreover, the numbers of Bifidobacteria and Lactobacilli , the Treg proportion in PBMC, and the protein expression levels of C1GALT1 and Cosmc in intestinal mucosa were significantly elevated (P <0.05), and those in TWM group were higher than those in Dex group (P <0.05). CONCLUSION TWM reduces the abnormal glycosylation level of IgA in IgAN rats by promoting the activation of C1GALT1/Cosmc pathway, and attenuates the intestinal flora disorder and immune dysfunction in IgAN rats, thus exerting the therapeutic effect. 相似文献
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AIM: To investigate the effect of tripterygium hypoglaucum Hutch (THH) on collagen-induced arthritis (CIA) in rats and its possible mechanism. METHODS: SD rats were randomly divided into normal group and CIA group. The rat model of type Ⅱ CIA was successfully established and the model rats were randomly divided into 4 different groups: model group, dexamethasone group, THH (200 mg/kg) group, and THH (400 mg/kg) group. The contents of IL-12, IL-23 and IL-37 in the serum and foot paws of the CIA rats were detected by ELISA. The histopathological changes of the skin of the food paws were observed by HE staining. The protein expression of MMP-13 was determined by Western blot. The MMP-13 activity in the foot paws was detected by fluorescence labeling method. RESULTS: Compared with CIA group, THH at dose of 400 mg/kg significantly reduced the weight loss in type Ⅱ CIA rats (P<0.01). THH at dose of 400 mg/kg obviously decreased the contents of IL-12 by 28.31%, IL-23 by 41.57% in the serum and IL-12 by 30.78%, IL-23 by 39.46% in the foot paws, while IL-37 was significantly increased by 79.43% in the serum and 75.78% in the foot paws (P<0.01). The pathological changes of the subcutaneous tissues were improved by treating with THH (400 mg/kg). The protein expression of MMP-13 was significantly decreased by 31.82% (P<0.01), and the MMP-13 activity was also reduced. THH at dose of 200 mg/kg had no obvious improvement on the above indexes. CONCLUSION: THH has significant inhibitory effect on rat CIA by reducing the content of proinflammatory cytokines IL-12 and IL-23, increasing the content of anti-inflammatory factor IL-37, inhibiting inflammatory cell infiltration and vascular proliferation, and attenuating the protein expression of MMP-13 and MMP-13 activity in rats. 相似文献
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采用1号2、号3、号菌种及其6种发酵剂进行接种发酵,研究大白菜腌渍过程中亚硝酸盐的变化规律及对pH的影响。结果表明:2号/3号菌种复配发酵速度最快,1号菌种发酵性能较弱。发酵酸白菜亚硝酸盐高峰出现在9~15 d,19 d后亚硝酸盐最高残留量为1.25 mg/kg,低于国家规定的标准(≤20 mg/kg)。pH在0~9 d迅速下降到3.5以下,之后趋于平稳。 相似文献