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Related Concept Videos

Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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B Cell Activation and Differentiation01:24

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Immune Response Against Viral Pathogens

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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
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Imaging of In Situ Interferon Gamma Production in the Mouse Spleen following Listeria monocytogenes Infection
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Innate IFNγ-producing B cells.

André Ballesteros-Tato1, Sara L Stone2, Frances E Lund2

  • 1Department of Medicine, Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.

Cell Research
|December 18, 2013
PubMed
Summary
This summary is machine-generated.

Researchers discovered a new type of B cell that produces interferon-gamma (IFNγ) to boost innate immunity and fight bacterial infections early on.

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Area of Science:

  • Immunology
  • Cell Biology
  • Infectious Diseases

Background:

  • B cells are typically known for their role in adaptive immunity through antibody production.
  • Innate-like immune cells bridge the gap between innate and adaptive immunity.
  • Understanding novel immune cell populations is crucial for developing new therapeutic strategies.

Purpose of the Study:

  • To characterize a newly identified population of B cells.
  • To investigate the function of these cells in innate immune responses.
  • To determine the role of these cells in controlling intracellular bacterial infections.

Main Methods:

  • Flow cytometry and single-cell RNA sequencing were used to identify and characterize the B cell population.
  • In vitro assays were performed to assess cytokine production and cell function.
  • In vivo infection models were utilized to evaluate the cells' role in pathogen control.

Main Results:

  • A novel population of B cells expressing markers associated with innate immunity was identified.
  • These B cells were found to produce significant amounts of interferon-gamma (IFNγ).
  • The IFNγ-producing B cells enhanced innate immune responses and improved early control of intracellular bacterial infections.

Conclusions:

  • A new subset of innate-like B cells plays a critical role in early host defense against bacterial pathogens.
  • These cells contribute to innate immunity by producing IFNγ, bridging innate and adaptive immune functions.
  • Targeting these cells could offer new avenues for treating intracellular bacterial infections.