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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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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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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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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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Inflammation is a fundamental, protective biological response of vascularized tissues to cellular injury, infection, or harmful stimuli. Its primary function is to eliminate the initial cause of injury, clear necrotic cells and damaged tissue, and initiate the necessary repair processes.Cardinal SignsAcute inflammation presents with classic signs. Redness results from vasodilation and increased blood flow. Heat is due to increased metabolism and circulation. Swelling results from the...
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Screening Assays to Characterize Novel Endothelial Regulators Involved in the Inflammatory Response
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T cells in vascular inflammatory diseases.

Lucas L Lintermans1, Coen A Stegeman2, Peter Heeringa3

  • 1Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen , Groningen , Netherlands.

Frontiers in Immunology
|October 30, 2014
PubMed
Summary

Effector memory T (TEM) cells drive vascular inflammation and tissue damage. Targeting the Kv1.3 channel on TEM cells offers a precise therapeutic strategy for vascular inflammatory diseases.

Keywords:
ANCA-associated vasculitisKv1.3 channelsT lymphocytesatherosclerosiseffector memory T cellsvascular inflammation

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Area of Science:

  • Immunology
  • Vascular Biology
  • Drug Discovery

Background:

  • Vascular inflammation underlies diverse autoimmune and chronic inflammatory diseases.
  • T lymphocytes, particularly CD4(+) T cells, play a critical role in these pathologies.
  • Specific subsets like effector memory T (TEM) cells are implicated in disease progression and tissue injury.

Purpose of the Study:

  • To review the role of CD4(+) T cells in vascular inflammation.
  • To highlight the contribution of effector memory T (TEM) cells to disease pathogenesis.
  • To explore the potential of targeting TEM cells for therapeutic intervention.

Main Methods:

  • Review of existing literature on T cell subsets in vascular inflammation.
  • Analysis of the pro-inflammatory functions of TEM cells and their associated cytokines.
  • Investigation into the unique dependence of TEM cell activation on the Kv1.3 channel.

Main Results:

  • TEM cells release pro-inflammatory cytokines that recruit immune cells to inflammatory lesions.
  • Impaired regulatory T cells contribute to the loss of anti-inflammatory control in vasculitis.
  • The Kv1.3 channel represents a specific target for modulating TEM cell activation.

Conclusions:

  • CD4(+) T cells, especially TEM cells, are key players in vascular inflammation.
  • Targeting TEM cells selectively offers a promising therapeutic avenue.
  • Modulating TEM cell effector functions can inhibit vascular inflammation, potentially avoiding broad immunosuppression.