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Inflammation01:38

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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...
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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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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...
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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.
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Intra-tracheal Administration of Haemophilus influenzae in Mouse Models to Study Airway Inflammation
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Microbe- and danger-induced inflammation.

Achille Broggi1, Francesca Granucci1

  • 1Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy.

Molecular Immunology
|July 20, 2014
PubMed
Summary
This summary is machine-generated.

The immune system distinguishes self from non-self, responding to danger signals (DAMPs) from stressed cells. This review explores how DAMPs initiate inflammation and its regulation to prevent autoimmune reactions.

Keywords:
DangerHMGB1InfectionsInflammasomeInflammationTLRs

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Area of Science:

  • Immunology
  • Cellular Biology

Background:

  • The immune system must target pathogens while tolerating self-tissues.
  • Theories like Janeway's Infectious Non-self and Matzinger's Danger theory attempt to explain self/non-self discrimination.
  • The immune system reacts to cellular damage and stress signals (DAMPs) with inflammation.

Purpose of the Study:

  • To review how damage-associated molecular patterns (DAMPs) induce inflammation.
  • To discuss the unique characteristics of danger-induced inflammation.
  • To contrast danger-induced inflammation with pathogen-induced immune responses.

Main Methods:

  • Literature review of immunological theories and DAMPs.
  • Analysis of inflammatory pathways triggered by DAMPs.
  • Comparative discussion of immune responses.

Main Results:

  • Janeway's theory is largely accepted, but the immune system also responds to DAMPs.
  • DAMPs elicit potent inflammatory responses from injured, stressed, or necrotic cells.
  • Danger-induced inflammation requires tight regulation to prevent autoimmunity.

Conclusions:

  • DAMPs are crucial initiators of inflammatory responses.
  • Understanding danger-induced inflammation is key to regulating immune responses and preventing autoimmune diseases.