畜牧兽医学报 ›› 2024, Vol. 55 ›› Issue (7): 3143-3154.doi: 10.11843/j.issn.0366-6964.2024.07.032

• 基础兽医 • 上一篇    下一篇

层状双氢氧化物-rFel d 1-Can f 1融合变应原对小鼠模型过敏反应的预防效果分析

彭美琪(), 魏春洁, 郑安琪, 朱亦坤, 徐琳皓, 罗承慧, 韦双双*(), 裴业春*()   

  1. 海南大学生命健康学院,海口 570228
  • 收稿日期:2023-10-23 出版日期:2024-07-23 发布日期:2024-07-24
  • 通讯作者: 韦双双,裴业春 E-mail:pengmeiqi1019@163.com;3657733@qq.com;ycpei@hainanu.edu.cn
  • 作者简介:彭美琪(1996-),女,重庆潼南人,硕士,主要从事宠物猫犬变应原纳米疫苗研究,E-mail:pengmeiqi1019@163.com
  • 基金资助:
    海南省自然科学基金高层次人才项目(320RC467);海南省科技专项(ZDYF2022SHFZ059);国家自然科学基金(32160837);国家自然科学基金(31860726);国家级大学生创新创业训练计划项目(202310589043)

Preventive Effect of Layered Double Hydroxide-rFel d 1-Can f 1 Fusion Allergens on Anaphylaxis in Mouse Model

Meiqi PENG(), Chunjie WEI, Anqi ZHENG, Yikun ZHU, Linhao XU, Chenghui LUO, Shuangshuang WEI*(), Yechun PEI*()   

  1. School of Life and Health Sciences, Hainan University, Haikou 570228, China
  • Received:2023-10-23 Online:2024-07-23 Published:2024-07-24
  • Contact: Shuangshuang WEI, Yechun PEI E-mail:pengmeiqi1019@163.com;3657733@qq.com;ycpei@hainanu.edu.cn

摘要:

旨在预防猫、犬诱导的过敏反应,本研究将猫主要变应原Fel d 1与犬主要变应原Can f 1融合原核表达,纯化制备了rFel d 1-Can f 1融合变应原。将层状双氢氧化物(layered double hydroxides,LDH)与rFel d 1-Can f 1混合,制备LDH-rFel d 1-Can f 1,皮下注射法免疫BALB/c小鼠,随后利用rFel d 1-Can f 1融合变应原诱导过敏小鼠模型,通过检测小鼠应激性过敏反应的体温变化、耳朵点刺试验、肺部组织切片HE染色、血清IgE水平等指标评价LDH-rFel d 1-Can f 1对猫犬诱发过敏反应的预防效果。研究表明,LDH与rFel d 1-Can f 1质量比为7 ∶1时,LDH可以完全吸附rFel d 1-Can f 1融合蛋白。LDH-rFel d 1-Can f 1可以有效缓解应激性过敏反应引起的小鼠体温下降,显著减少过敏导致的染料渗透面积。肺部组织切片HE染色结果显示,LDH-rFel d 1-Can f 1可以缓解过敏引起的炎症细胞浸润。此外,LDH-rFel d 1-Can f 1免疫后可以诱导小鼠产生较高水平IgG,这为开发抑制宠物猫犬诱发过敏反应的疫苗奠定基础。

关键词: 融合变应原, 层状双氢氧化物, 纳米颗粒, 宠物过敏

Abstract:

To prevent allergic reactions induced by cats and dogs, we purified rFel d 1-Can f 1 fusion allergen by fusion prokaryotic expression of cat primary allergen Fel d 1 and dog primary allergen Can f 1. We mixed Layered double hydroxides (LDH) with rFel d 1-Can f 1 to prepare LDH-rFel d 1-Can f 1 and immunized BALB/c mice by subcutaneous injection. Subsequently, we used rFel d 1-can f 1 fusion allergen to induce allergic mice models. We evaluated the preventive effect of LDH-rFel d 1-Can f 1 on allergic reactions caused by cats and dogs through anaphylaxis, ear prick test, H&E staining of lung tissue sections, and serum IgE level. The results showed that LDH could completely adsorb the fusion protein of rFel d 1-Can f 1 when the mass ratio of LDH to rFel d 1-Can f 1 was 7 ∶1. The LDH-rFel d 1-Can f 1 can effectively relieve the hypothermia caused by stress allergic reaction in mice, and significantly reduce the dye penetration area caused by allergy. H&E staining of lung tissue sections showed that LDH-rFel d 1-Can f 1 could relieve inflammatory cell invasion caused by the allergy. In addition, the LDH-rFel d 1-Can f 1 can induce mice to produce higher levels of IgG, which lays the foundation for the development of vaccines that inhibit allergic reactions induced by pet cats and dogs.

Key words: fusion allergens, layered double hydroxides (LDH), nanoparticle, pet allergies

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