目的探讨嗜盐隐杆藻胞外多糖(exopo lysaccharide of Aphanothece ha lophy tica,EPAH)的抗肿瘤活性。方法以S180肉瘤为肿瘤模型,检测EPAH对肿瘤生长的抑制活性;M TT法检测EPAH对S180肉瘤细胞、Sm cc7721肝癌细胞和H eL a细胞的体外抑...目的探讨嗜盐隐杆藻胞外多糖(exopo lysaccharide of Aphanothece ha lophy tica,EPAH)的抗肿瘤活性。方法以S180肉瘤为肿瘤模型,检测EPAH对肿瘤生长的抑制活性;M TT法检测EPAH对S180肉瘤细胞、Sm cc7721肝癌细胞和H eL a细胞的体外抑制活性;以对荷瘤小鼠免疫器官、血液淋巴细胞数量及淋巴细胞增殖影响、NK细胞杀伤活性和巨噬细胞产生NO及其他细胞因子的影响评价EPAH对小鼠免疫功能的作用。结果EPAH对S180肉瘤生长有显著的抑制作用,其中预防给药和与肿瘤接种同时给药组最大抑瘤率分别达66.79%和47.93%。100μg/mL EPAH对Sm cc7721细胞、H eL a细胞以及S180细胞生长的抑制率达60%以上。EPAH显著提高荷瘤小鼠脾脏和胸腺质量以及血液淋巴细胞数量,促进淋巴细胞增殖反应,增加NK细胞杀伤活性,刺激巨噬细胞产生NO,分泌白细胞介素-1β(IL-1β)及肿瘤坏死因子-α(TNF-α)。结论EPAH有显著的抗肿瘤活性,并能直接作用于肿瘤细胞,抑制肿瘤生长。EPAH可能是通过增加荷瘤小鼠免疫器官的质量和免疫细胞的数量、促进淋巴细胞分裂,提高NK细胞杀伤活性和巨噬细胞产生NO以及其他细胞因子实现其抗肿瘤活性。展开更多
蒲黄为香蒲科植物水烛香蒲(Typha angustifoliall)、东方香蒲(Typha orientalis Presll)或同属植物的干燥花粉,为临床常用中药。近年来,随着对蒲黄研究的不断深入,其药理活性越来越受到重视,临床应用范围也在不断扩大。就蒲黄的药理学...蒲黄为香蒲科植物水烛香蒲(Typha angustifoliall)、东方香蒲(Typha orientalis Presll)或同属植物的干燥花粉,为临床常用中药。近年来,随着对蒲黄研究的不断深入,其药理活性越来越受到重视,临床应用范围也在不断扩大。就蒲黄的药理学活性及其临床应用进行综述,为蒲黄资源的开发应用提供了参考。展开更多
Phenolic compounds from field-grown Inonotus obliquus sclerotia (Chaga) consist mainly of hispidin analogs and melanins, and are thought to be the active constituents to treat several human diseases. In submerged cult...Phenolic compounds from field-grown Inonotus obliquus sclerotia (Chaga) consist mainly of hispidin analogs and melanins, and are thought to be the active constituents to treat several human diseases. In submerged cultures of the fungus, however, no information is currently available on the production of phenolic compounds and their corresponding pharmacological functions. In this study, phenolic compounds from Chaga and submerged cultures of the fungus were assayed for their composition and immune-stimulating effects. Phenolic compounds produced by I. obliquus in submerged cultures mostly consist of flavonoids, together with small amounts of hispidin analogs and melanins. This is quite contrary to the situation in Chaga, where flavonoids are determined as trace elements. Furthermore, phenolic compounds from Chaga show capacity about two-fold higher than those produced in submerged cultures in inhibiting cyclophosphamide-induced reduction of bodyweight, spleen index and viability of peripheral lymphocytes in test mice. Thus less production of hispidin analogs and melanins is likely to be responsible for less immune-stimulating effects in phenolic compounds from submerged cultures, and additional factors should be imposed during submerged cultures of I. obliquus to regulate biosynthesis of phenolic compounds directed to the composition similar to Chaga.展开更多
目的阐明新月菱形藻胞外多糖(exopolysaccharides of Nitzschia closterium,EPN)的成分、单糖组成及其硫酸酯化条件。方法新月菱形藻胞外多糖以醇沉法从该藻的培养液中制备;DEAE-Sephedex25柱分离,HPLC法测定其质量分数,HPLC测定其相对...目的阐明新月菱形藻胞外多糖(exopolysaccharides of Nitzschia closterium,EPN)的成分、单糖组成及其硫酸酯化条件。方法新月菱形藻胞外多糖以醇沉法从该藻的培养液中制备;DEAE-Sephedex25柱分离,HPLC法测定其质量分数,HPLC测定其相对分子质量;以氯磺酸-吡啶法探索新月菱形藻硫酸酯化反应条件。结果新月菱形藻向胞外分泌3种多糖,相对分子质量分别为EPN11.886×105,EPN21.41×105,EPN31.134×105。3种多糖的单糖组成均为甘露糖、鼠李糖、葡萄糖醛酸、葡萄糖和岩藻糖。甘露糖、鼠李糖、葡萄糖醛酸、葡萄糖和岩藻糖的摩尔比在EPN1为4.3∶1∶5.1∶8.9∶5.6,EPN2为4.2∶7.3∶3.7∶12.8∶3.4,EPN3为3.5∶2.1∶4.3∶4.9∶4.7。3种多糖的硫酸酯化条件基本一致,提高氯磺酸比例和延长反应时间均有利于增加酯化产物的硫酸根、提高取代度和酸酯化反应的产率。结论新月菱形藻胞外多糖为酸性多糖,其硫酸酯化产物多糖硫酸酯可能具有潜在的药理活性。展开更多
文摘目的探讨嗜盐隐杆藻胞外多糖(exopo lysaccharide of Aphanothece ha lophy tica,EPAH)的抗肿瘤活性。方法以S180肉瘤为肿瘤模型,检测EPAH对肿瘤生长的抑制活性;M TT法检测EPAH对S180肉瘤细胞、Sm cc7721肝癌细胞和H eL a细胞的体外抑制活性;以对荷瘤小鼠免疫器官、血液淋巴细胞数量及淋巴细胞增殖影响、NK细胞杀伤活性和巨噬细胞产生NO及其他细胞因子的影响评价EPAH对小鼠免疫功能的作用。结果EPAH对S180肉瘤生长有显著的抑制作用,其中预防给药和与肿瘤接种同时给药组最大抑瘤率分别达66.79%和47.93%。100μg/mL EPAH对Sm cc7721细胞、H eL a细胞以及S180细胞生长的抑制率达60%以上。EPAH显著提高荷瘤小鼠脾脏和胸腺质量以及血液淋巴细胞数量,促进淋巴细胞增殖反应,增加NK细胞杀伤活性,刺激巨噬细胞产生NO,分泌白细胞介素-1β(IL-1β)及肿瘤坏死因子-α(TNF-α)。结论EPAH有显著的抗肿瘤活性,并能直接作用于肿瘤细胞,抑制肿瘤生长。EPAH可能是通过增加荷瘤小鼠免疫器官的质量和免疫细胞的数量、促进淋巴细胞分裂,提高NK细胞杀伤活性和巨噬细胞产生NO以及其他细胞因子实现其抗肿瘤活性。
文摘蒲黄为香蒲科植物水烛香蒲(Typha angustifoliall)、东方香蒲(Typha orientalis Presll)或同属植物的干燥花粉,为临床常用中药。近年来,随着对蒲黄研究的不断深入,其药理活性越来越受到重视,临床应用范围也在不断扩大。就蒲黄的药理学活性及其临床应用进行综述,为蒲黄资源的开发应用提供了参考。
基金Supported by Key Project of Grant from Natural Science Foundations of Education Department of Jiangsu Province (No.05KJA36012)a Grant of Natural Science Foundations from the Government of Jiangsu Province (BK2006034)
基金a Grant from Natural Science Foundations of Education Department of Jiangsu Province (No. 05KJA36012)a Grant of Natural Science Foundations from the Government of Jiangsu Province (No. BK2006034)
文摘Phenolic compounds from field-grown Inonotus obliquus sclerotia (Chaga) consist mainly of hispidin analogs and melanins, and are thought to be the active constituents to treat several human diseases. In submerged cultures of the fungus, however, no information is currently available on the production of phenolic compounds and their corresponding pharmacological functions. In this study, phenolic compounds from Chaga and submerged cultures of the fungus were assayed for their composition and immune-stimulating effects. Phenolic compounds produced by I. obliquus in submerged cultures mostly consist of flavonoids, together with small amounts of hispidin analogs and melanins. This is quite contrary to the situation in Chaga, where flavonoids are determined as trace elements. Furthermore, phenolic compounds from Chaga show capacity about two-fold higher than those produced in submerged cultures in inhibiting cyclophosphamide-induced reduction of bodyweight, spleen index and viability of peripheral lymphocytes in test mice. Thus less production of hispidin analogs and melanins is likely to be responsible for less immune-stimulating effects in phenolic compounds from submerged cultures, and additional factors should be imposed during submerged cultures of I. obliquus to regulate biosynthesis of phenolic compounds directed to the composition similar to Chaga.
文摘目的阐明新月菱形藻胞外多糖(exopolysaccharides of Nitzschia closterium,EPN)的成分、单糖组成及其硫酸酯化条件。方法新月菱形藻胞外多糖以醇沉法从该藻的培养液中制备;DEAE-Sephedex25柱分离,HPLC法测定其质量分数,HPLC测定其相对分子质量;以氯磺酸-吡啶法探索新月菱形藻硫酸酯化反应条件。结果新月菱形藻向胞外分泌3种多糖,相对分子质量分别为EPN11.886×105,EPN21.41×105,EPN31.134×105。3种多糖的单糖组成均为甘露糖、鼠李糖、葡萄糖醛酸、葡萄糖和岩藻糖。甘露糖、鼠李糖、葡萄糖醛酸、葡萄糖和岩藻糖的摩尔比在EPN1为4.3∶1∶5.1∶8.9∶5.6,EPN2为4.2∶7.3∶3.7∶12.8∶3.4,EPN3为3.5∶2.1∶4.3∶4.9∶4.7。3种多糖的硫酸酯化条件基本一致,提高氯磺酸比例和延长反应时间均有利于增加酯化产物的硫酸根、提高取代度和酸酯化反应的产率。结论新月菱形藻胞外多糖为酸性多糖,其硫酸酯化产物多糖硫酸酯可能具有潜在的药理活性。
