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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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The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
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Development of Immunocompetence01:22

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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.
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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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Related Experiment Video

Updated: Dec 14, 2025

Characterization of Thymus-dependent and Thymus-independent Immunoglobulin Isotype Responses in Mice Using Enzyme-linked Immunosorbent Assay
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Human Immune System Variation during 1 Year.

Tadepally Lakshmikanth1, Sayyed Auwn Muhammad1, Axel Olin1

  • 1Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, Karolinska, Sweden.

Cell Reports
|July 23, 2020
PubMed
Summary
This summary is machine-generated.

Most people have stable immune systems, but the degree of change over time is unique to each individual. High variability may link metabolic and immune health.

Keywords:
Computational BiologyCytometryHuman ImmunologyImmune VariationImmunityMass cytometryPlasma proteomicsSeasonal VariationSystems Immunology

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Area of Science:

  • Immunology
  • Systems Biology
  • Human Physiology

Background:

  • Individual immune system variation is significant, yet longitudinal changes within individuals are not well understood.
  • Systems-level analyses offer a comprehensive approach to studying complex biological systems like the immune system.
  • Understanding immune system dynamics is crucial for personalized health and disease prevention.

Purpose of the Study:

  • To conduct a longitudinal, systems-level analysis of the human immune system in healthy adults.
  • To characterize interindividual variation and identify extreme immune phenotypes over time.
  • To infer regulatory relationships between immune cells and plasma proteins.

Main Methods:

  • Longitudinal sampling every three months for one year in 99 healthy adults (50-65 years old).
  • Simultaneous quantification of 115 immune cell populations and 750 plasma proteins.
  • Analysis of coordinated measurement fluctuations to infer system-level relationships.

Main Results:

  • Most individuals exhibit stable immune system parameters over one year.
  • The degree of longitudinal immune system variability is an individual characteristic.
  • Highly variable individuals showed altered metabolic health markers, suggesting a metabolic-immunologic link.

Conclusions:

  • Immune system stability varies significantly between individuals, with some showing greater longitudinal fluctuation.
  • Individual immune system variability may be associated with metabolic health.
  • Further research is warranted to explore the interplay between metabolic and immunologic homeostasis.