畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (5): 2507-2519.doi: 10.11843/j.issn.0366-6964.2025.05.045

• 临床兽医 • 上一篇    下一篇

白术多糖超大介孔二氧化硅纳米颗粒的制备及其黏膜免疫佐剂活性的研究

林欣怡1(), 蒋欣雨1, 苏子诺1, 王煜灵1, 阮诗雨1, 洪海龙1, 吴佳豪1, 伯若楠1,2,*()   

  1. 1. 扬州大学兽医学院, 扬州 225009
    2. 江苏省高校动物重要疫病与人兽共患病防控协同创新中心, 扬州 225009
  • 收稿日期:2024-05-08 出版日期:2025-05-23 发布日期:2025-05-27
  • 通讯作者: 伯若楠 E-mail:mzdzh@foxmail.com;007309@yzu.edu.cn
  • 作者简介:林欣怡(2003-),女,江苏南京人,本科生,主要从事中药成分新型纳米制剂免疫研究,E-mail:mzdzh@foxmail.com
  • 基金资助:
    国家自然科学基金(32002324);江苏省自然科学基金(BK2020945);江苏省高校优势学科建设工程资助项目(JS20130601);扬州大学大学生创新创业训练计划项目(XCX20230741);扬州大学教学改革研究课题(YZUJX2023-C13)

Study on Preparation and the Mucosal Immune Adjuvant Activity of Ultra-Large Mesoporous Silica Nanoparticles Loading Polysaccharide from Atractylodes macrocephala Koidz

LIN Xinyi1(), JIANG Xinyu1, SU Zinuo1, WANG Yuling1, RUAN Shiyu1, HONG Hailong1, WU Jiahao1, BO Ruonan1,2,*()   

  1. 1. College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
    2. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
  • Received:2024-05-08 Online:2025-05-23 Published:2025-05-27
  • Contact: BO Ruonan E-mail:mzdzh@foxmail.com;007309@yzu.edu.cn

摘要:

旨在结合白术多糖和超大介孔二氧化硅两者的优势,开发新型中药多糖黏膜免疫佐剂。本研究首先制备白术多糖超大介孔二氧化硅(AMP-UCMS)纳米颗粒并对其进行一系列表征,包括透射电镜、粒径、电势、聚合物分散性指数(polymer dispersity index,PDI)和红外光谱,然后进一步研究口服AMP-UCMS作为H9N2型禽流感灭活病毒的黏膜免疫佐剂活性。试验选取150只雏鸡随机分成6组并进行不同免疫处理,分别为阴性对照(Control)、全灭活病毒(whole inactivated virus, WIV)、WIV+AMP、WIV+UCMS、WIV+AMP-UCMS、市售疫苗(Vaccine),其中各组选取6只雏鸡用H9N2禽流感病毒滴鼻攻毒。通过血凝抑制(HI)试验测定各组鸡血清HI抗体效价;采用ELISA方法检测空肠H9N2型禽流感病毒特异性sIgA抗体水平;利用HE染色观察空肠和肺的组织形态变化;利用实时荧光定量PCR(RT-qPCR)测定空肠IgA J-chainpIgRTNF-αIL-1β的mRNA表达水平以及攻毒后鸡的肺组织病毒载量等各项指标。试验结果显示,与Control组相比,WIV+AMP-UCMS组可极显著提高鸡血清HI抗体效价(P < 0.000 1)和空肠特异性sIgA抗体水平(P < 0.01),并能够极显著降低肺组织病毒载量(P < 0.000 1),鸡空肠组织中IgA J-chain(P < 0.001)、pIgR(P < 0.000 1)、TNF-αIL-1β(P < 0.000 1)的mRNA表达水平都极显著提高,此外还能够增加鸡空肠iIEL数量,降低攻毒后肺组织的损伤。综上表明,白术多糖被成功装载到超大介孔二氧化硅中,AMP-UCMS能够有效诱导鸡的全身免疫和黏膜免疫应答。这些研究结果为新型中药多糖黏膜免疫佐剂在畜禽口服疫苗领域的开发应用提供了参考。

关键词: 白术多糖, 超大介孔二氧化硅, 黏膜免疫佐剂, 表征, H9N2灭活病毒

Abstract:

The aim of this study was to develop a new type of traditional Chinese medicine polysaccharide mucosal immune adjuvant by combining the advantages of polysaccharide from Atractylodes macrocephala Koids and ultra-large mesoporous silica. First, ultra-large mesoporous silica nanoparticles loading polysaccharide from Atractylodes macrocephala Koidz (AMP-UCMS) was prepared and a series of characterizations were carried out on it, including transmission electron microscopy, particle size, potential, polymer dispersity index (PDI) and infrared spectroscopy. Then, the mucosal immune adjuvant activity of oral AMP-UCMS as an inactivated H9N2 avian influenza virus was further studied. In the experiment, 150 chicks were randomly divided into 6 groups and received different immunization treatments, namely negative control (Control), whole inactivated virus (WIV), WIV+AMP, WIV+UCMS, WIV+AMP-UCMS, and commercially available vaccine (Vaccine). Among them, 6 chicks from each group were intranasally challenged with H9N2 avian influenza virus. The hemagglutination inhibition (HI) test was used to determine the HI antibody titer of chicken serum in each group; the ELISA method was used to detect the specific sIgA antibody level of H9N2 avian influenza virus in the jejunum; the HE staining was used to observed the histomorphology changes of the jejunum and lung; real-time fluorescent quantitative PCR (RT-qPCR) was used to determine the mRNA expression levels of IgA J-chain, pIgR, TNF-α and IL-1β in the jejunum and various indicators such as the viral load in the lungs of chickens after challenge. The results showed that compared with the Control group, WIV+AMP-UCMS group could highly significantly increase the HI antibody titer of chicken serum (P < 0.000 1) and the specific sIgA antibody level in the jejunum (P < 0.01), and highly significantly reduce the viral load in the lungs (P < 0.000 1), and the mRNA expression levels of chicken jejunum IgA J-chain(P < 0.001), pIgR(P < 0.000 1), TNF-α and IL-1β (P < 0.000 1) were all highly significantly increased. Additionally, it could increase the number of intraepithelial lymphocytes (iIELs) in the chicken jejunum and reduce lung tissue damage following viral challenge. In conclusion, polysaccharide from Atractylodes macrocephala Koidz was successfully loaded into ultra-large mesoporous silica in the current study, and AMP-UCMS could effectively induce systemic immunity and mucosal immune responses in chickens. These research results provide a reference for the development and application of new traditional Chinese medicine polysaccharide mucosal immune adjuvants in the field of oral vaccines for livestock and poultry.

Key words: polysaccharide from Atractylodes macrocephala Koidz, ultra-large pore mesoporous silica nanoparticles, mucosal immune adjuvants, characterization, inactivated H9N2 avian influenza virus

中图分类号: