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Related Concept Videos

Structure and Function of Leukocytes01:21

Structure and Function of Leukocytes

An adult in good health typically has between 4,500 and 11,000 leukocytes, or white blood cells, per microliter of blood, which constitutes about 1% of the total blood volume. Unlike red blood cells, white blood cells contain a nucleus and other cellular organelles but do not have hemoglobin. Most white blood cells reside in connective tissues, particularly in lymphatic organs such as the lymph nodes, with only a small fraction present in circulating blood.
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Acute Inflammation II: Cellular Phase

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Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
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The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
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Imaging CD4 T Cell Interstitial Migration in the Inflamed Dermis
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Published on: March 25, 2016

Interstitial leukocyte migration and immune function.

Peter Friedl1, Bettina Weigelin

  • 1Department of Cell Biology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Geert Grooteplein 28, 6525GA Nijmegen, 6500 HB Nijmegen, The Netherlands. p.friedl@ncmls.ru.nl

Nature Immunology
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Summary
This summary is machine-generated.

Leukocyte trafficking, crucial for immune responses, involves amoeboid migration guided by signals. This review covers leukocyte movement, sensing, and therapeutic strategies.

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Area of Science:

  • Immunology
  • Cell Biology
  • Physiology

Background:

  • Leukocyte trafficking is essential for immune cell development, immunosurveillance, and effector functions.
  • Interstitial leukocyte migration involves amoeboid polarization and movement guided by chemoattractant signals.
  • Amoeboid movement is uniquely suited for scanning cellular networks and tissues.

Purpose of the Study:

  • To review the mechanisms of leukocyte migration and sensing.
  • To discuss leukocyte involvement in diapedesis, interstitial migration, and egress.
  • To explore immune cell positioning in inflammation and therapeutic interference strategies.

Main Methods:

  • Review of existing literature on leukocyte migration.
  • Analysis of mechanisms governing diapedesis and interstitial movement.
  • Examination of chemoattractant signaling and immune cell positioning.

Main Results:

  • Leukocyte migration is a complex process involving amoeboid movement and signal guidance.
  • Understanding these mechanisms is key to immune cell positioning during inflammation.
  • Emerging strategies aim to interfere with these trafficking pathways.

Conclusions:

  • Leukocyte migration mechanisms are fundamental to immune system function.
  • Targeting leukocyte trafficking offers potential therapeutic avenues.
  • Further research into leukocyte sensing and migration is warranted.