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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
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Immune system influence on physiology.

Matthias Nahrendorf1,2,3,4,5, Florent Ginhoux6,7,8,9, Filip K Swirski10,11,12

  • 1Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.

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Summary

The immune system maintains body balance and defends against threats. Recent studies reveal its extensive communication with other organ systems, highlighting its role in regulating essential physiological processes.

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Area of Science:

  • Immunology
  • Physiology
  • Systems Biology

Background:

  • The immune system's primary role is maintaining homeostasis and defending against stressors.
  • Immunity involves diverse cellular processes like phagocytosis, antigen recognition, and cytokine secretion.
  • Immune cells extensively interact with cells from other organ systems, indicating a broader physiological role.

Purpose of the Study:

  • To review recent studies on the immune system's role beyond defense.
  • To highlight the bidirectional communication between the immune system and other physiological systems.
  • To illustrate how immune cells regulate biological processes throughout the body.

Main Methods:

  • Literature review of recent immunological and physiological studies.
  • Analysis of research demonstrating cross-talk between immune cells and other organ systems.
  • Synthesis of findings on the regulatory functions of leukocytes in various tissues.

Main Results:

  • Immune cells communicate extensively with nervous, circulatory, metabolic, and other systems.
  • This cross-talk is often bidirectional and symbiotic.
  • Leukocytes actively sense, interpret, and regulate physiological processes across tissues.

Conclusions:

  • Immunity is a complex network integral to many physiological processes, not just defense.
  • The immune system plays a crucial, often symbiotic, role in regulating overall body physiology.
  • Understanding these interactions is key to comprehending life's essential functions.