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Related Concept Videos

Development of Immunocompetence01:22

Development of Immunocompetence

The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
Humoral Immune Responses01:36

Humoral Immune Responses

Overview
Active versus Passive Immunity01:31

Active versus Passive Immunity

Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
Active Immunity
Active immunity refers to the resistance one develops...
Immunological Memory01:23

Immunological Memory

Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
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Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...
Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Immunoprecipitation01:20

Immunoprecipitation

Immunoprecipitation, or IP, is a widely used technique that employs protein-antibody interactions to isolate proteins or protein complexes in their native state for studying protein-protein interactions, quaternary structures, or supramolecular complexes. Various modifications of the technique, including chromatin IP, cross-linking IP, and fluorescence IP, are commonly used.
Chromatin Immunoprecipitation
Chromatin immunoprecipitation, also known as ChIP, is used to study protein-DNA or...

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Comparative in vivo Study of gp96 Adjuvanticity in the Frog Xenopus laevis
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Published on: September 16, 2010

Comparative immunology.

Edwin L Cooper1

  • 1Laboratory of Comparative Immunology, Department of Neurobiology, David Geffen School of Medicine at UCLA, University of California, Los Angeles, California 90095-1763.

Integrative and Comparative Biology
|June 18, 2011
PubMed
Summary
This summary is machine-generated.

Comparative immunology reveals innate immune systems in invertebrates and plants defend against microbes. These ancient systems, though lacking memory, effectively detect infections using conserved molecular patterns.

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Published on: September 16, 2010

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Characterization of Thymus-dependent and Thymus-independent Immunoglobulin Isotype Responses in Mice Using Enzyme-linked Immunosorbent Assay

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Area of Science:

  • Zoology
  • Immunology
  • Evolutionary Biology

Background:

  • Comparative immunology studies the evolution of immune systems across species.
  • Invertebrates and plants possess innate immunity, defending against pathogens for millions of years.
  • Vertebrates evolved acquired immunity, while innate immunity predates it.

Purpose of the Study:

  • To explore the evolutionary significance of innate immune systems.
  • To highlight the functional capabilities of germline-encoded receptors in innate immunity.
  • To re-evaluate the role of innate immunity beyond a temporary defense mechanism.

Main Methods:

  • Comparative analysis of immune system molecules and functions across diverse taxa.
  • Examination of germline-encoded receptors and their recognition mechanisms.
  • Review of evolutionary evidence for innate immunity's persistence and efficacy.

Main Results:

  • Invertebrates share homologous immune molecules with vertebrates.
  • Innate immune systems utilize pattern recognition receptors to detect conserved microbial features (e.g., lipopolysaccharide).
  • Innate immunity provides effective, albeit non-specific, detection of infections without immunological memory.

Conclusions:

  • Innate immunity is a highly successful and ancient defense strategy, not merely a rudimentary system.
  • The evolutionary success of innate immunity underscores its crucial role in host defense across kingdoms.
  • Comparative immunology provides valuable insights into the fundamental mechanisms and evolution of host defense.