Human immune system variation

Journal name:
Nature Reviews Immunology
Volume:
17,
Pages:
21–29
Year published:
DOI:
doi:10.1038/nri.2016.125
Published online

Abstract

The human immune system is highly variable between individuals but relatively stable over time within a given person. Recent conceptual and technological advances have enabled systems immunology analyses, which reveal the composition of immune cells and proteins in populations of healthy individuals. The range of variation and some specific influences that shape an individual's immune system is now becoming clearer. Human immune systems vary as a consequence of heritable and non-heritable influences, but symbiotic and pathogenic microbes and other non-heritable influences explain most of this variation. Understanding when and how such influences shape the human immune system is key for defining metrics of immunological health and understanding the risk of immune-mediated and infectious diseases.

At a glance

Figures

  1. The blood as a window for global immune system analysis in humans.
    Figure 1: The blood as a window for global immune system analysis in humans.

    Although the blood is not an immunological organ per se, it is the conduit for most immune cells circulating in the body, especially after an immunological stimulus such as vaccination, allowing even distal processes to be reflected in a blood sample that is readily accessible even in humans.

  2. Variation in immune cells and proteins.
    Figure 2: Variation in immune cells and proteins.

    a | An illustration of the observed stability of most immune cell and protein measurements over the course of weeks to months. During acute immune responses drastic changes occur, but thereafter measurements seem to return to a stable baseline. b |Distributions of six principal immune cell populations from a Stanford cohort (n = 398) of healthy adults11, 17. Numbers indicate minimum and maximal values observed.

  3. Distribution of immune system variation in human populations.
    Figure 3: Distribution of immune system variation in human populations.

    There are two possibilities for human immune system variation, either individuals are distributed continuously with respect to their immune system composition or in discrete groups, so called 'immunotypes'.

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Author information

Affiliations

  1. Science for Life Laboratory, Department of Medicine, Solna, Karolinska Institutet, Stockholm 17165, Sweden.

    • Petter Brodin
  2. Department of Neonatology, Karolinska University Hospital, Stockholm 14186, Sweden.

    • Petter Brodin
  3. Department of Microbiology and Immunology, Stanford University School of Medicine

    • Mark M. Davis
  4. Institute of Immunity, Transplantation and Infection, Stanford University School of Medicine.

    • Mark M. Davis
  5. Howard Hughes Medical Institute, Stanford University School of Medicine, California 94304, USA.

    • Mark M. Davis

Competing interests statement

The authors declare no competing interests.

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Author details

  • Petter Brodin

    Petter Brodin is an assistant professor at the Karolinska Institutet, Stockholm, Sweden, and divides his time between clinical work in paediatrics and neonatology and systems immunology research, with a particular interest in human immune system variation and the influences shaping human immune systems. A particular focus of his laboratory is to better understand how environmental conditions early in life affect the developing human immune system. Petter Brodin's website: brodinlab.com

  • Mark M. Davis

    Mark M. Davis is interested in developing approaches to understand the human immune system in both health and disease. This involves the specific components and their interactions at a systems level. This often involves developing or adapting new methods that can address important questions in a definitive way. Mark M. Davis' website: med.stanford.edu/davislab

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