目的观察石斛水溶性多糖(solub le polysaccharides fromDendrobium candidum,SPD)对在体肿瘤和离体培养肿瘤细胞的抑制作用,探讨其抑制作用的可能机制。方法观察SPD对小鼠接种肉瘤(S180)瘤体生长,离体培养人肝肿瘤细胞(SMMC27721)生长...目的观察石斛水溶性多糖(solub le polysaccharides fromDendrobium candidum,SPD)对在体肿瘤和离体培养肿瘤细胞的抑制作用,探讨其抑制作用的可能机制。方法观察SPD对小鼠接种肉瘤(S180)瘤体生长,离体培养人肝肿瘤细胞(SMMC27721)生长的抑制作用;分析小鼠外周血中超氧物歧化酶活性(superoxide d ismutase,SOD)和膜脂过氧化产物丙二醛(m alond ialdehyde,MDA)含量,小鼠胸腺指数和脾脏指数的变化;核染色(Hoechst染色)法观察SPD对人神经母瘤细胞(SH-SY5Y)细胞凋亡的影响。结果SPD处理能够有效抑制小鼠肉瘤(S180)瘤体生长和离体肝肿瘤细胞生长(P<0.05);有效提高荷瘤小鼠胸腺指数和脾脏指数,提高SOD活性和降低MDA含量(P<0.05);促进神经母瘤细胞凋亡。结论SPD具有显著的抗肿瘤效应,其抑瘤机制可能与SPD促进免疫器官功能和提高抗氧化能力有关。展开更多
目的对萝藦科植物耳叶牛皮消(Cynanchum auriculatum Royle ex Wight)的化学成分进行分离和结构鉴定。方法溶剂提取后采用高效离心分配色谱,大孔吸附树脂柱层析,硅胶柱层析,半制备型HPLC分离纯化,通过理化性质和波谱技术鉴定结构。结果...目的对萝藦科植物耳叶牛皮消(Cynanchum auriculatum Royle ex Wight)的化学成分进行分离和结构鉴定。方法溶剂提取后采用高效离心分配色谱,大孔吸附树脂柱层析,硅胶柱层析,半制备型HPLC分离纯化,通过理化性质和波谱技术鉴定结构。结果从耳叶牛皮消中分离了1个化合物,鉴定为告达庭3-O-β-D-夹竹桃吡喃糖基-(1→4)-β-D-夹竹桃吡喃糖基-(1→4)-β-D-磁麻吡喃糖苷。结论该化合物为首次从该植物中分离得到。展开更多
目的观察亚砷酸钠(Na As O_2)对小鼠骨髓嗜多染红细胞(PCE)微核形成的影响。方法昆明种小鼠雌、雄性小鼠各自随机分为6组,每组8只。以Na As O_2灌胃处理各组小鼠,以100 mg/kg环磷酰胺为阳性对照,以生理盐水为阴性对照,镜检计算嗜多染红...目的观察亚砷酸钠(Na As O_2)对小鼠骨髓嗜多染红细胞(PCE)微核形成的影响。方法昆明种小鼠雌、雄性小鼠各自随机分为6组,每组8只。以Na As O_2灌胃处理各组小鼠,以100 mg/kg环磷酰胺为阳性对照,以生理盐水为阴性对照,镜检计算嗜多染红细胞微核率,计算嗜多染红细胞/正染红细胞(NCE)比值。结果与阴性对照组比较,1.5625,3.125,6.25,12.5 mg/kg Na As O_2各剂量组均能增加雌、雄性小鼠骨髓PCE细胞的微核率,差异有统计学意义(P<0.05);且呈剂量依赖效应。各剂量Na As O_2处理组与阴性对照组的PCE/NCE比值比较,差异无统计学意义(P>0.05)。结论亚砷酸钠对小鼠骨髓嗜多染红细胞具有较强的促微核形成能力,且无性别差异。展开更多
The effects of various rare earth elements on growth and isoflavonoid production in hairy root cultures of Pueraria lobata (Willd.) Ohwi (strain TR2) cultured in 500 ml flasks were studied. After 32 days of culture, t...The effects of various rare earth elements on growth and isoflavonoid production in hairy root cultures of Pueraria lobata (Willd.) Ohwi (strain TR2) cultured in 500 ml flasks were studied. After 32 days of culture, the biomass of hairy roots increase 15 times and reach 3.2 g dry weight. Hairy root growth was inhibited by Y_2O_3, NaSeO_3 and Sm^(3+) because of brown formation. But significant promoting effect on root growth due to callus formation was observed in La^(3+) treatments. It is the most noteworthy that the production of total isoflavonoids and puerarin was enhanced greatly by La^(3+) treatment. A major portion of increased total isoflavonoids and puerarin was released into medium in La^(3+) treatment while the hairy root viabilities were preserved. Some specific secondary metabolite release processes could be induced by La^(3+) and their possible mechanism is discussed.展开更多
文摘目的观察石斛水溶性多糖(solub le polysaccharides fromDendrobium candidum,SPD)对在体肿瘤和离体培养肿瘤细胞的抑制作用,探讨其抑制作用的可能机制。方法观察SPD对小鼠接种肉瘤(S180)瘤体生长,离体培养人肝肿瘤细胞(SMMC27721)生长的抑制作用;分析小鼠外周血中超氧物歧化酶活性(superoxide d ismutase,SOD)和膜脂过氧化产物丙二醛(m alond ialdehyde,MDA)含量,小鼠胸腺指数和脾脏指数的变化;核染色(Hoechst染色)法观察SPD对人神经母瘤细胞(SH-SY5Y)细胞凋亡的影响。结果SPD处理能够有效抑制小鼠肉瘤(S180)瘤体生长和离体肝肿瘤细胞生长(P<0.05);有效提高荷瘤小鼠胸腺指数和脾脏指数,提高SOD活性和降低MDA含量(P<0.05);促进神经母瘤细胞凋亡。结论SPD具有显著的抗肿瘤效应,其抑瘤机制可能与SPD促进免疫器官功能和提高抗氧化能力有关。
文摘目的对萝藦科植物耳叶牛皮消(Cynanchum auriculatum Royle ex Wight)的化学成分进行分离和结构鉴定。方法溶剂提取后采用高效离心分配色谱,大孔吸附树脂柱层析,硅胶柱层析,半制备型HPLC分离纯化,通过理化性质和波谱技术鉴定结构。结果从耳叶牛皮消中分离了1个化合物,鉴定为告达庭3-O-β-D-夹竹桃吡喃糖基-(1→4)-β-D-夹竹桃吡喃糖基-(1→4)-β-D-磁麻吡喃糖苷。结论该化合物为首次从该植物中分离得到。
文摘目的观察亚砷酸钠(Na As O_2)对小鼠骨髓嗜多染红细胞(PCE)微核形成的影响。方法昆明种小鼠雌、雄性小鼠各自随机分为6组,每组8只。以Na As O_2灌胃处理各组小鼠,以100 mg/kg环磷酰胺为阳性对照,以生理盐水为阴性对照,镜检计算嗜多染红细胞微核率,计算嗜多染红细胞/正染红细胞(NCE)比值。结果与阴性对照组比较,1.5625,3.125,6.25,12.5 mg/kg Na As O_2各剂量组均能增加雌、雄性小鼠骨髓PCE细胞的微核率,差异有统计学意义(P<0.05);且呈剂量依赖效应。各剂量Na As O_2处理组与阴性对照组的PCE/NCE比值比较,差异无统计学意义(P>0.05)。结论亚砷酸钠对小鼠骨髓嗜多染红细胞具有较强的促微核形成能力,且无性别差异。
文摘The effects of various rare earth elements on growth and isoflavonoid production in hairy root cultures of Pueraria lobata (Willd.) Ohwi (strain TR2) cultured in 500 ml flasks were studied. After 32 days of culture, the biomass of hairy roots increase 15 times and reach 3.2 g dry weight. Hairy root growth was inhibited by Y_2O_3, NaSeO_3 and Sm^(3+) because of brown formation. But significant promoting effect on root growth due to callus formation was observed in La^(3+) treatments. It is the most noteworthy that the production of total isoflavonoids and puerarin was enhanced greatly by La^(3+) treatment. A major portion of increased total isoflavonoids and puerarin was released into medium in La^(3+) treatment while the hairy root viabilities were preserved. Some specific secondary metabolite release processes could be induced by La^(3+) and their possible mechanism is discussed.
