共查询到19条相似文献,搜索用时 62 毫秒
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黄芪是一味药食两用、补中益气的中国传统中药,黄芪多糖是其最重要的天然活性成分,具有无耐药性、抗菌、抗病毒、提高机体免疫力及抗氧化功能,改善肠道微生态等作用,其中以免疫调节作用最为突出。大量研究证明,黄芪多糖在体内外均具有显著的免疫调节作用。作者归纳了黄芪多糖对免疫相关基因的调控,在器官免疫、细胞免疫、细胞因子和胞内信使物质、心血管系统免疫、抗菌免疫、抗病毒免疫等方面的作用,以及其作为免疫佐剂在猪瘟(CSF)、猪圆环病毒病(PCVD)、猪口蹄疫(FMD)、猪繁殖与呼吸综合征(PRRS)、猪支原体肺炎(MPS)等仔猪疾病应用的最新研究进展,发现黄芪多糖主要作为免疫佐剂及动物饲料添加剂使用,应用范围狭窄,缺乏深度的研究开发。今后应加强对分离、纯化后的均一组分低分子质量黄芪多糖及其结构特点,以及其与免疫调节作用间构效关系的研究以提高黄芪多糖疗效,推广其临床应用。 相似文献
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多糖(Polysaccharides,PS)是高等植物、动物细胞膜,微生物细胞壁中的天然大分子物质,具有广泛的生物活性。迄今为止,已有300多种多糖类化合物从天然产物中被分离出来。现将近年来国内外多糖的免疫药理作用的研究进展等几个问题综述如下。 相似文献
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黄芪多糖作为传统中药黄芪的主要提取成分,不仅能够预防和治疗动物的病毒性和肿瘤疾病,而且还能显著改善动物生产性能,提高动物生产经济效益,对畜禽养殖业具有重要的意义。本文综述了黄芪多糖的药理作用及其在动物生产中应用的研究进展,以为其在畜禽养殖的合理应用提供理论依据。 相似文献
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黄芪多糖的药理作用及在养猪业中的应用 总被引:1,自引:0,他引:1
文章从糖、多糖类基本知识说起系统阐述了黄芪提取物及其有效成分——黄芪多糖的成分、提取方法、质量检测、生物活性,以及黄芪多糖在养猪业中的应用。 相似文献
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经过多年的药理研究表明,黄芪多糖具有促进动物生长、提高免疫力和降低发病率等作用,已被广泛用于各种动物的养殖中,文中就2005年以来黄芪多糖在兽医临床上使用的情况作一综述。 相似文献
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响应面法优化微波萃取黄芪多糖工艺的研究 总被引:6,自引:1,他引:6
用微波萃取技术从内蒙古黄芪[Astragalus membranaceus(Fisch.)Bunge var.mongholious(Bunge)Hsiao]的干燥根中提取黄芪多糖。依据响应面法(RSM,Response surface methodology)原理,使用Design Expert(Static Made Easy,Minneapolis,MN,USA.version6.0.5,2001)软件的中心组合设计建立试验数学模型,对微波萃取黄芪多糖的提取时间、加热温度、提取溶液pH值及液料比进行优化组合。得到最优回归方程:Y=1.14+1·258E-003X1+0.16X2-0.027X3+0.15X4+0.032X11-0.047X22+0.025X33-0.047X22+0.025X33+0.029X44+0.043X1X2-0.018X1X3-0.059X1X4-0.027X2X3+2.263E-003X2X4+0.012X3X4。确定最优操作工艺参数为:微波加热时间20min、加热温度120℃、液料比8∶1、pH值10。粗多糖得率为32%,纯度为44.4%。测定值与预测值相关系数r为0.976。 相似文献
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Shan Li Lina Ren Xudong Zhu Jiaolong Li Lin Zhang Xiaofei Wang Feng Gao Guanghong Zhou 《Animal Science Journal》2019,90(1):117-127
In this study, we irradiated Astragalus polysaccharides (APS) using 25 kGy 60Co γ ray to obtain γ‐irradiated Astragalus polysaccharides (IAPS) and then investigated the effects of IAPS on growth performance and immune function of cyclophosphamide (CPM)‐treated broilers. The physicochemical properties of APS and IAPS (molecular weight, water solubility, viscosity, morphological and structural properties) were evaluated. Then, 384 one‐day‐old Arbor Acres broiler chicks with similar initial weight were randomly assigned into 6 groups: the non‐treated group (control), and CPM‐treated groups were fed either a basal diet or the diets containing 900 mg/kg APS, or 900, 600, 300 mg/kg IAPS, respectively. On days 16, 18, and 20, all broilers except for the control group were intramuscularly injected with 0.5 ml CPM (40 mg/kg·BW). Broilers in the control group were intramuscularly injected with 0.5 ml sterilized saline (0.75%, wt/vol). This trial lasted for 21 days. The physicochemical treatment showed that γ irradiation could decrease the molecular weight and viscosity, and increase the water solubility of APS (p < 0.05), whereas the structural properties of APS was not affected. In the animal trial, 900 mg/kg APS or 900, 600 mg/kg IAPS relieved the decreased growth performance, thymus index, T lymphocytes proliferation, serum IgG concentration, NOS activity and the increased blood heterophil:lymphocyte ratio in CPM‐treated broilers (p < 0.05). CPM‐induced decreases in B lymphocytes proliferation and serum IgM concentration were only increased by IAPS at 900 mg/kg (p < 0.05). Overall, both APS and IAPS alleviated CPM‐induced immunosuppression. Especially, IAPS possessed better immunomodulatory effect than APS, indicating that γ irradiation could be used as an effective method to enhance the immunomodulatory activity of APS. 相似文献
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