螺旋藻营养片多糖含量的测定

用化学方法提取了螺旋藻营养片中的多糖成分，并用＂苯酚─硫酸法＂测定了多糖的含量。结果表明：螺旋藻营养片的多糖含量为１．１６％，测定方法可靠。     

茶叶多糖的研究进展

茶叶多糖是一种复合杂多糖，具有许多生物活性。作者系统地介绍了茶叶多糖的提取、分离、纯化、纯度鉴定及相对分子质量测定的方法，以及其含量和组成、理化性质、化学结构及空间构象、生物活性等方面的研究进展，并对上述方法及研究进展进行了分析和评述。     

富锌姬松茸胞内多糖的分离及体内抑制小鼠肝癌的研究

研究了经DEAE-纤维素离子交换柱分离的富锌液态发酵姬松茸胞内多糖组分对小鼠肝癌实体型Heps的体内抑制效果,同时考察了柱层析过后各组分中锌元素的分布情况及给药后小鼠血清锌的变化情况。分离所得组分MP-2在5 mg/(kg.d)剂量下抑瘤率为59.5%(p<0.001),MP-3在10 mg/(kg.d)剂量下抑瘤率为68.1%(p<0.001),两样品在10 mg/(kg.d)剂量下均能使小鼠脾指数显著提高。组分MP-2含锌率3.38‰、MP-3含锌率2.46‰,远高于组分MP-1的含锌率0.12‰;注射样品MP-2、MP-3的实验组小鼠血清锌浓度皆显著高于不给予富锌样品的阴性对照组(p<0.05)。     

In vivo and in vitro anti-tumour response of selenium-protein polysaccharide extracted from rich selenium Agaricus blazei

In this study, the anti-tumour activity of selenium-protein polysaccharide (SPP), a water extract of the rich selenium Agaricus blazei, was tested both in vivo and in vitro. The results of in vivo experiments show that SPP at doses of 50 and 100 mg/kg inhibits proliferation of implanted Sarcoma 180 by 22 and 37.69%, respectively, and promotes lymphocyte transformation and natural killer (NK) cells activity in tumour bearing mice. During the in vitro experiment, we treated the tumour and non-tumour bearing mice with SPP, and prepared serum treated with SPP (Serum_SPP). The results show that Serum_SPP, whether from tumour or non-tumour bearing mice, significantly inhibits K562 cells proliferation and induces their apoptosis, and also significantly increases caspase-3 activity of K562 cells. However, the difference in anti-tumour activity of Serum_SPP between tumour and non-tumour bearing mice is significantly different (p<0.01). The results, according to the studies both in vivo and in vitro, imply that SPP extracted from rich selenium A. blazei can inhibit growth of implanted Sarcoma 180 and promote lymphocyte transformation and NK cells activity in vivo. Additionally, Serum_SPP can inhibit proliferation and cause apoptotic morphological changes and the fragmentation of internucleosomal DNA, and increase caspase-3 activity of K562 cells in vitro, which indicates that apoptosis of K562 cells induced by Serum_SPP may be related to up-regulation of caspase-3.     

枸杞多糖对运动性骨骼肌疲劳恢复的细胞定量化学分析和电镜观察

通过小鼠实验，用枸杞多糖解除运动性骨骼肌疲劳，以显微分光光度计进行琥珀酸脱氢酶(SDH)和糖原的定性定量分析，并于透射电镜下观察超微结构的变化。结果显示，运动疲劳(B)组糖原含量明显降低，各类肌纤维与对照(A)组比较P<0．001。SDH活性增加，各类肌纤维与A组比较P<0．001。服用枸杞多糖(C)组糖原含量增加，各类肌纤维与A组之较P<0．001；与B组比较P<0．001；SDH反应较B组更深，各类肌纤维与A组比较P<0．001，若与B组比较，则其中Ⅰ(慢肌)型和Ⅱ(中间肌)型P<0．001，而Ⅱ(快肌)型则P>0．05。超微结构显示，B组线粒体增多且体积明显增大，呈肿胀状态，C组全无此类改变，提示服用枸杞多糖后可解除疲劳，其中以Ⅰ(慢肌)型肌纤维效果尤佳。     

一些保肝药物对原代培养大鼠肝细胞糖原合成功能的影响

本文参照PO Seglen的方法并加以修改,建立了原代培养大鼠肝细胞糖原合成功能的测定体系。观察到联苯双酯既能使正常肝细胞合成糖原增加88%,又能保护肝细胞完全拮抗四氯化碳对其功能的损伤;银耳多糖能使四氯化碳对肝细胞糖原合成功能的损伤减轻57%;去甲斑蝥素10μg/ml能增加肝细胞糖原合成,浓度增加到100μg/ml时,此作用减弱,1000μg/ml则明显抑制糖原的合成,而且在10～100μg/ml浓度时,即能加强四氯化碳的损伤作用;100μg/ml CL₁₅₀₀和熊果酸二钠单独应用可增加肝细胞糖原合成,但与四氯化碳同时应用,反而加重对糖原合成的抑制作用。     

莼菜多糖蛋白体营养液治疗便秘疗效观察

对随机抽取的57例成人便秘者,服用莼莱多糖蛋白体营养液治疗。结果服用第3天便秘症状缓解,第5天有56％以上服药者达到每天排一次正常软便,第9天全部便秘者症状消除。     

补益中药有效活性成分的免疫药理研究及应用

几种补益中药(枸杞子、淫羊藿、黄芪和女贞子)的多糖成分具有免疫增强和调节作用,这种作用以提高T淋巴细胞功能为主.主要包括:(1)对有丝分裂剂诱导的T细胞增殖反应更敏感;(2)提高细胞免疫功能的作用部位在胸腺;(3)对于免疫功能低下的老龄鼠和荷瘤鼠均有明显增强T淋巴细胞活性作用.补益中药的多糖成分可能是它们具有"扶正固本"和调节免疫功能的主要物质基础.     

金针菇子实体多糖提取物对人肝癌SMMC—7721细胞的抑增殖作用

金针菇子实体经热水提取，乙醇沉淀，胰蛋白酶水解，Ｓｅｖａｇ法去除蛋白质，乙醇分级沉淀等处理得金针菇子实体多糖。研究了该多糖对人肝部ＳＭＭＣ－７７２１细胞生长曲线，有丝分裂指数及线粒体活性的影响。结果表明该多糖对体外培养的人肝癌ＳＭＭＣ－７７２１细胞具一定抑制作用。     

A quantitative ELISA for antigen-specific IgG subclasses using equivalence dilutions of anti-kappa and anti-subclass specific secondary reagents Application to the study of the murine immune response against the capsular polysaccharide of Neisseria meningitidis serogroup B

We have developed an enzyme-linked immunosorbent assay (ELISA) to measure murine antigen-specific IgG antibodies of defined subclass using precalibrated equivalence dilutions of anti-κ (in the standard) and each anti-IgG subclass-specific polyclonal secondary antibody (in the test sample). The calibration of secondary reagents could be carried out easily with a set of monoclonal antibodies (MoAbs) specific for all IgG subclasses. These MoAbs do not require purification or standardization. In addition the MoAbs can be of different antigenic specificity. Once the equivalence dilutions have been determined, they can be applied in a quantitative ELISA using the same antigen in the standard and sample, and using only one IgG subclass standard for the determination of all the IgG subclasses. The method is easy to standardize for many antigenic systems. It is particularly useful when the only standard available is one standardized MoAb of the appropriate specificity, and it could be adapted to use with standard polyclonal antibodies having a known content of total antigen-specific IgG bearing κ chains but unknown IgG subclass composition. The use of this method to quantitate IgG specific for the capsular polysaccharide of Neisseria meningitidis serogroup B (CpsB) gave highly reproducible measures with an interbatch CV of 5–6% similar for all IgG subclasses and low detection limits ranging from 0.3 ng/well for IgG3 to 0.8 ng/well for IgG2a. The IgG subclass response observed after immunization with live meningococci was mainly IgG2a (74%) and IgG2b (18%). Hyperimmunization modified this IgG distribution to one of mainly IgG3 (62%) and IgG1 (28%) which was maintained in the response to a single immunization 4 weeks later, possibly indicating the generation of resting B cells during continuous stimulation.