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Related Concept Videos

Inflammatory Response01:28

Inflammatory Response

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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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Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

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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.
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Inflammatory Response I: Vascular and Cellular01:30

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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,...
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Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
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Nuclear Fusion02:45

Nuclear Fusion

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The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
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Related Experiment Video

Updated: Feb 12, 2026

Induction of an Inflammatory Response in Primary Hepatocyte Cultures from Mice
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NOS1 mediates AP1 nuclear translocation and inflammatory response.

Mansi Srivastava1, Mirza S Baig1

  • 1Discipline of Biosciences and Biomedical Engineering (BSBE), Indian Institute of Technology Indore (IITI), Simrol-453552, Indore, MP, India.

Biomedicine & Pharmacotherapy = Biomedecine & Pharmacotherapie
|April 2, 2018
PubMed
Summary

Nitric oxide synthase 1 (NOS1) inhibition prevents the nuclear translocation of AP1 transcription factor subunits. This mechanism suppresses inflammatory gene transcription, reducing the inflammatory response after endotoxin shock.

Keywords:
Activator protein-1 (AP1)InflammationMacrophageProinflammatory cytokines

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Area of Science:

  • Immunology
  • Molecular Biology
  • Pharmacology

Background:

  • Nuclear translocation of the Activator Protein 1 (AP1) transcription factor is a key driver of inflammatory responses.
  • AP1, comprising Jun, ATF2, and Fos proteins, induces proinflammatory cytokine expression following endotoxin shock.

Purpose of the Study:

  • To investigate the role of Nitric Oxide Synthase 1 (NOS1) in the nuclear translocation of AP1 transcription factor subunits.
  • To explore the potential of NOS1 inhibition in modulating inflammatory gene expression and response.

Main Methods:

  • Pharmacological inhibition of NOS1.
  • Assessment of AP1 transcription factor subunit nuclear translocation.
  • Analysis of inflammatory gene transcription levels.

Main Results:

  • NOS1 inhibition was found to prevent the nuclear translocation of AP1 transcription factor subunits.
  • Inhibition of NOS1 impeded the translocation of AP1 subunits into the nucleus.
  • This suppression of AP1 translocation led to reduced transcription of inflammatory genes.

Conclusions:

  • The study reveals a novel mechanism involving NOS1-mediated AP1 nuclear translocation.
  • Pharmacological inhibition of NOS1 effectively diminishes the inflammatory response by suppressing inflammatory gene transcription.
  • Further exploration of this NOS1-mediated pathway is warranted.