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相关概念视频

Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Antigen Presenting Cells01:22

Antigen Presenting Cells

The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...

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相关实验视频

Updated: Jul 9, 2026

Whole-animal Imaging and Flow Cytometric Techniques for Analysis of Antigen-specific CD8+ T Cell Responses after Nanoparticle Vaccination
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LL37-CpG纳米颗粒的多价值联合组装:通过激活多个细胞内化通路,增强免疫反应.

Yushuang Wei1, Wenwen Li1, Rong Xu2,1

  • 1Songshan Lake Materials Laboratory, Dongguan, 523808, Guangdong, China.

Materials today. Bio
|July 7, 2025
PubMed
概括

人类抗微生物LL37有助于将CpG寡核酸 (CpG ODNs) 组装成纳米粒子,增强细胞吸收并促进潜在的疫苗辅助剂和治疗药物的免疫反应.

关键词:
细胞内部化 细胞内部化免疫调节 免疫调节LL37 LL37 法律问题自己组装的纳米粒子.单链核酸是一种单链核酸.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 生物技术是生物技术.
  • 纳米医学是一种纳米医学.

背景情况:

  • 人类抗微生物LL37对于免疫调节至关重要,在慢性炎症疾病中升高.
  • 了解LL37的机制是开发免疫辅助剂和治疗方法的关键.
  • CpG寡核酸 (CpG ODNs) 是临床相关的免疫辅助剂.

研究的目的:

  • 研究LL37如何促进CpG ODN组装成纳米粒子.
  • 确定LL37-CpG纳米粒子的细胞吸收机制和免疫激活潜力.
  • 探索LL37-CpG复合物的治疗应用.

主要方法:

  • 使用LL37将CpG ODN组装成纳米粒子 (NP),以控制大小和泽塔潜力.
  • 分析了细胞吸收途径 (受体介导的巨型皮诺细胞体,克拉特林介导的内细胞体).
  • 测量了巨细胞中TNF-α的产生,以评估通过 lysosomal TLR9.9的免疫激活.

主要成果:

  • LL37将CpG ODNs组装成依赖电荷比的纳米粒子.
  • 在LL37-CpGNP中,LL37-CpGNP利用了巨细胞和LL37介导的膜透来增强细胞吸收.
  • LL37-CpG NP内部化显著提高了巨细胞的TNF-α产生 (>3.5倍) 通过 lysosomal TLR9.9.

结论:

  • LL37-CpG纳米粒子组装增强细胞吸收和免疫细胞激活.
  • 这种机制提供了一种新的方法来调节使用-CpG ODN 复合体的免疫反应.
  • LL37-CpG NPs作为疫苗辅助剂和疾病治疗中的免疫调节具有前景.