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相关概念视频

Inflammatory Response I: Vascular and Cellular01:30

Inflammatory Response I: Vascular and Cellular

The inflammatory response is the body's defense against infection, injury, or irritation from bacteria, trauma, toxins, or heat. Inflammation helps locate and destroy pathogens and remove damaged tissue elements to heal the body. During this initial phase, fluid, blood products, and nutrients migrate to the injured area, resulting in redness, heat, swelling, ache, and loss of function. Moreover, signs of systemic inflammation include fever, increased WBC count, malaise, anorexia, nausea,...
Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

Inflammatory Response II: Inflammatory Exudate and Tissue Repair

The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
The typical wound exudate is odorless, transparent, straw-colored, thin, and watery. Exudate, however, can differ depending on the state of wound healing. Likewise, the exudate's...
Inflammatory Response01:28

Inflammatory Response

An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Acute Inflammation I: Inflammatory Response01:26

Acute Inflammation I: Inflammatory Response

Acute inflammation is a rapid, short-lived physiological response to tissue injury or infection, designed to eliminate harmful agents and initiate repair. This tightly regulated process typically lasts from minutes to several days and is triggered by factors such as microbial invasion, physical trauma, or chemical injury.Recognition and Mediator ReleaseThe inflammatory response begins when resident immune cells—such as mast cells, macrophages, and dendritic cells—detect damage-associated...
Acute Inflammation III: Local and Systemic Effects01:25

Acute Inflammation III: Local and Systemic Effects

Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
Chronic Inflammation: Introduction01:12

Chronic Inflammation: Introduction

Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...

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相关实验视频

Updated: Jun 11, 2026

In vivo Imaging Method to Distinguish Acute and Chronic Inflammation
07:10

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Published on: August 16, 2013

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清晰的炎症程序是肌肉内脂质纳米粒子反应的基础.

William Dowell1,2, Jacob Dearborn1,2, Sylvester Languon1,2

  • 1Department of Surgery; Larner College of Medicine, University of Vermont, Burlington, Vermont 05405, United States.

ACS nano
|November 20, 2024
PubMed
概括
此摘要是机器生成的。

脂质纳米粒子 (LNP) 配方影响免疫反应. 某些LNP引发炎症和免疫细胞激活,这对于有效的疫苗和疗法至关重要.

关键词:
癌症疫苗 疫苗 癌症疫苗基因治疗的基因疗法具有天生的免疫力.电离性脂质是一种可离子化的脂质.脂质纳米颗粒的使用方法在mRNA治疗中,mRNA疗法.在mRNA疫苗的使用中.

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Immunostimulatory Agent Evaluation: Lymphoid Tissue Extraction and Injection Route-Dependent Dendritic Cell Activation
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相关实验视频

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Whole-animal Imaging and Flow Cytometric Techniques for Analysis of Antigen-specific CD8+ T Cell Responses after Nanoparticle Vaccination
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科学领域:

  • 生物技术是生物技术.
  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学

背景情况:

  • 传递 RNA (mRNA) 和脂质纳米粒子 (LNP) 技术在疫苗学和基因疗法中至关重要.
  • 了解mRNA/LNP的免疫性对于优化治疗和疫苗设计至关重要.
  • 一些mRNA/LNP可以创造一种辅助剂般的环境,增强免疫反应.

研究的目的:

  • 为了评估mRNA/LNP组件的辅助作用.
  • 为了研究炎症和免疫细胞对不同LNP配方的反应.
  • 建立基于mRNA/LNP的疫苗和治疗方法的设计框架.

主要方法:

  • 在注射部位透的表型细胞.
  • 追踪免疫细胞对mRNA/LNP的吸收.
  • 使用基因表达和单细胞RNA测序来评估炎症状态.
  • 将各种化学上不同的空虚LNP (eLNP) 给肌肉组织.

主要成果:

  • 针对不同的LNP,确定了两种类型的炎症基因表达程序 (A类和B类).
  • 在24小时内,A类eLNP诱导了显著的中性粒细胞透和髓状细胞积累.
  • 含有SM-102的LNP在髓状细胞中促进了炎症性化学激素的表达.
  • 观察到骨髓细胞,细胞和树突细胞 (包括cDC2s) 的直接转移和激活.
  • mRNA和LNP协同提供先天免疫刺激.

结论:

  • mRNA/LNP可以直接激活免疫细胞,从而有助于疫苗的疗效.
  • LNP的化学成分决定了炎症概况和免疫细胞的参与.
  • 这项研究提供了通过控制免疫性来设计有效的mRNA/LNP疫苗和治疗方法的见解.