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Related Concept Videos

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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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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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Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
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Related Experiment Video

Updated: May 4, 2026

Identification of Mediators of T-cell Receptor Signaling via the Screening of Chemical Inhibitor Libraries
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Exploring the signalling pathways promoting T cell effector responses in chronic inflammation.

P Isomäki1, J M Clark, P Vagenas

  • 1Kennedy Institute of Rheumatology Division, Imperial College School of Medicine, Arthritis Research Campaign Building , 1 Aspenlea Road, Hammersmith, London W6 8LH , UK.

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Summary

Chronic inflammation, like in rheumatoid arthritis, alters T helper cell signaling. This shifts immune responses from regulation to promoting disease persistence and effector functions.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cellular Signaling

Background:

  • T helper cell differentiation is governed by gene transcription, influenced by T cell receptor and cytokine receptor signaling.
  • This model explains T cell effector responses in autoimmunity, chronic inflammation, and allergies.
  • Regulation of T helper cell differentiation in established chronic inflammatory diseases remains less understood.

Purpose of the Study:

  • To review recent experimental data on T helper cell regulation in chronic inflammatory diseases.
  • To explore how inflammatory processes impact T cell receptor and cytokine signaling pathways.
  • To propose a model for the role of T helper cells in disease initiation and chronicity.

Main Methods:

  • Review of recent experimental data and literature.
  • Analysis of T cell receptor and cytokine signal transduction pathways.
  • Integration of findings into a proposed model of T helper cell function in chronic inflammation.

Main Results:

  • Inflammatory processes profoundly influence T cell signaling pathways.
  • These alterations attenuate immunoregulatory and host defense mechanisms.
  • Simultaneously, inflammation promotes T cell survival and effector responses.

Conclusions:

  • The inflammatory process reshapes T helper cell responses.
  • Antigen-driven T cell responses initiate inflammation.
  • Cytokine-driven responses sustain the chronic phase of diseases like rheumatoid arthritis.