当归多糖及其中性组分对巨噬细胞分泌TNF-α的影响

目的 :观察当归多糖 (ASP)及其中性组分 (ASP 1)在体内外对小鼠腹腔巨噬细胞 (MФ)分泌TNF α的影响。方法 :直接制取小鼠腹腔MФ ,与ASP及ASP 1共同培养 16h ;ASP及ASP 112 5、2 5 0mg kg经口灌胃给药 7d ,于第 7d制取MФ ,体外培养 16h ,分别观察ASP及ASP 1在体外均可显著增强MФ对TNF α的分泌。ASP及ASP 1体内给药无直接诱导MФ分泌TNF α的功能。结论 :ASP及ASP 1在体内外均可增强小鼠腹腔MФ分泌TNF α的功能。     

螺旋藻多糖对人宫颈癌Hela细胞体外生长的影响

目的：探讨螺旋藻多糖（PSP）对体外培养的Hela细胞生长的影响。方法：采用MTT法测定 PSP的抗肿瘤活性，并观察其对Hela细胞形态学的影响。结果：随PSP浓度的升高，Hela细胞存活率逐渐降低，抑制率逐渐增加；光镜下观察显示，PSP作用24-48h后，细胞出现明显的形态学改变。结论：PSP能抑制Hela细胞增殖。     

裙带菜孢子叶营养成分分析

裙带菜孢子叶营养成分分析苏秀榕，李太武，丁明进（辽宁师范大学食品生化所辽宁师范大学生物系，大连１１６０２２）ＡｎａｌｙｓｉｓｏｆｔｈｃＮｕｔｒｉｅｎｔｓｉｎＳｐｏｒｏｐｈｙｌｌｏｆＵｎｄａｒｉａｐｉｎｎａｔｉｆｉｄａ（Ｈａｒｖ．）Ｓｕｒｉｎｇａｒ￥Ｓ...     

党参多糖介导Nrf2通路对缺氧缺血性脑损伤的抗氧化和神经保护作用

目的　研究党参多糖对缺氧缺血性脑损伤的抗氧化和神经保护作用及其机制。 方法　采用Rice法建立HIBI模型。假手术组和模型组灌胃给予生理盐水，模型加药组灌胃给予党参多糖。分别进行神经功能学评分，观察脑积水量，脑组织病理学改变，神经元细胞凋亡情况，脑组织脂质过氧化物水平，抗氧化和神经保护相关蛋白表达水平。 结果　党参多糖能显著改善模型大鼠神经功能、脑水肿（P<0.01）和病理改变，降低细胞凋亡率（P<0.01）和Bax表达（P<0.01），降低LDH和MDA含量（P<0.01）；同时，上调Bcl-2表达（P<0.01）和SOD活性（P<0.01），增加bFGF、BDNF、PSD95、SYP、Nrf2和HO-1表达（P<0.01）。 结论　党参多糖对缺氧缺血性脑损伤具有抗氧化和神经保护作用，可能与介导Nrf2信号通路相关。     

Anticoagulant Activity of Fucoidan from Brown Algae Fucus evanescens of the Okhotsk Sea

In vitro and in vivo experiments showed that anticoagulant activity of sulfated polysaccharide from Fucus evanescens (brown algae of the Okhotsk Sea) was similar to that of heparin. Anticoagulant properties of fucoidan are determined by thrombin inhibition mediated via plasma antithrombin III.     

After chemotherapy,functional humoral response capacity is restored before complete restoration of lymphoid compartments

Chemotherapy has, besides the beneficial effects, several adverse effects. Suppression of the immune system is one of the most important problems. Infections caused by encapsulated bacteria like Streptococcus pneumoniae are responsible for a major part of infectious problems during and after treatment. The splenic marginal zone is essential in the initiation of an immune response to encapsulated bacteria. In this study, we analysed the effects of three different cytostatic agents on humoral immune responses. We found a reduced, but detectable immune response capacity at two days after treatment although the marginal zone B cell population is severely reduced at this time point. Twenty-four days after cessation of treatment, the immune response capacity was largely restored although lymphoid compartments were still not completely restored at that time point. Apparently, the presence of only few marginal zone B cells is sufficient to evoke a rise in antibody titres and although antibody titre increases are low, even small rises are most likely clinically relevant.     

Neutral Polymeric Surfactants Derived from Dextran: A Study of Their Aqueous Solution Behavior

Summary: Amphiphilic polysaccharides are obtained by hydrophobic modification of a neutral bacterial polysaccharide, dextran. By reacting the polysaccharide with aliphatic epoxides (epoxyoctane and epoxydodecane) in dimethyl sulfoxide, a series of amphiphilic polymers is obtained which covers a large range of structural parameters (length of the polysaccharide, number and nature of hydrocarbon moieties). The solution behavior of dextran derivatives is first characterized by viscometric measurements in dilute and semi‐dilute domains. The effects of molecular parameters on polymer viscosity behavior are evidenced and discussed. Information on the state of aggregation of polymers is obtained by the use of static and dynamic light scattering. The presence of aggregates in the dilute domain is clearly evidenced and their structural characteristics are estimated (size, molecular weight and number of aggregation). The aggregates are shown to account for the viscometric results in the examined concentration range, relating their chemical parameters (hydrodynamic radius and molecular weight) to the macroscopic behavior of the solutions.

     

红芪多糖药理作用及机制的研究进展

红芪是甘肃道地药材,现代药学研究表明红芪多糖是红芪的主要活性成分,是由五碳糖、六碳糖和其衍生物糖醇或糖酸构成的植物多糖,具有免疫调节、抗氧化、抗炎、抗肿瘤、机体保护、防治糖尿病及抗骨质疏松等药理作用。通过对红芪多糖的药理作用进行综述,阐明红芪多糖药理作用可能的机制,为红芪多糖的进一步研究及临床应用提供理论依据。     

太子参化学成分、药理作用和应用的研究进展

太子参Pseudostellariae Radix是中国传统补益中药材之一,兼具药用和食疗功效,主要含有挥发油、多糖、环肽、生物碱、皂苷、酚类等成分,具有降血糖、抗炎、抗癌、保护细胞、抑制酪氨酸酶、免疫调节等药理作用。对太子参的化学成分及其药理作用,以及太子参在临床、食疗、保健食品、化妆品、兽药制剂和功能性饲料添加剂等方面应用进行总结,为太子参进一步开发利用提供依据。     

霍山石斛多糖的结构分析、生物活性研究进展及与不同种间多糖成分差异性分析

霍山石斛Dendrobium huoshanense作为一种名贵的滋补类中药,收载于《中国药典》2020年版。多糖为其主要活性成分之一,具有免疫调节、保肝、抗肿瘤、抗氧化和抗炎等药理活性。通过查阅国内外文献,基于中国知网及PubMed等中英文文献数据库分析当前研究现状及研究热点;总结霍山石斛多糖（Dendrobium huoshanense polysaccharide,DHP）的提取分离、结构解析及其生物活性;分析其多糖成分与其他常用石斛品种的差异性。以期更好地开发利用DHP,为DHP产品的深入开发与研究及质量标准完善提供参考和思路。