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相关概念视频

Antibody Structure01:10

Antibody Structure

Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
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Allergic Drug Reactions01:27

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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing numerous...
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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
Allergic Reactions: Anaphylaxis01:30

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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...

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从食用昆虫中提取蛋白质:对IgE结合能力的影响

Bruno Carriço-Sá1, Carla S S Teixeira1, Caterina Villa1

  • 1REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.

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|December 18, 2024
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可食用昆虫提供可持续的蛋白质,但可以引发过敏. 这项研究确定了一种快速提取昆虫蛋白质的方法,发现它们与甲类过敏交叉反应,主要是通过形状表征.

关键词:
它们是家禽 (Acheta domesticus).过敏原IgE-反应活性阿尔菲托比乌斯 (Alphitobius diaperinus) 是一个长毛虫.的IgE结合能力.龙迁徙者 (英语:Locusta migratoria) 是一种迁徙的动物.蛋白质提取蛋白质的提取方法布里奥·莫莱托尔 (Tenebrio molitor) 是一个布里奥的动物.

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科学领域:

  • 食品科学 食品科学 食品科学
  • 过敏学 过敏学
  • 蛋白质化学 蛋白质化学

背景情况:

  • 可食用昆虫被推广为可持续的蛋白质替代品.
  • 昆虫的消费对具有特定过敏的个体构成风险,特别是对甲类动物.
  • 了解昆虫蛋白质的过敏性对于食品安全至关重要.

研究的目的:

  • 从欧盟批准的四种食用昆虫物种中分离蛋白质.
  • 为了评估这些蛋白质的免疫球蛋白E (IgE) 反应性,使用甲类过敏患者的血清.
  • 确定有效的蛋白质提取方法用于过敏原分析.

主要方法:

  • 在Tenebrio molitor,Alphitobius diaperinus,Acheta domesticus和Locusta migratoria中应用了16种蛋白质提取协议.
  • 使用了一种快速协议 (3.5小时),涉及Tris-HCl缓冲器与SDS.
  • 使用患者血清评估IgE结合能力,并分析表皮质可访问性.

主要成果:

  • 一个简单快速的提取协议 (100mM Tris-HCl + 4% SDS,pH 7.6) 是最有效的隔离IgE反应性蛋白质.
  • 来自所有四种昆虫物种的蛋白质与甲类过敏患者血清显示出显著的IgE反应性.
  • IgE结合主要由构造性表位细胞介导,变性可能暴露线性表位细胞.

结论:

  • 开发的提取方法有效地隔离了过敏原昆虫蛋白.
  • 可食用昆虫蛋白质和甲类过敏原之间的交叉反应是过敏个体的一个重大问题.
  • 为了进行风险评估,需要进一步研究特定的过敏原表位.