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Related Experiment Videos

Monocyte kinetics in rabbits.

M Ohgami1, C M Doerschuk, R P Gie

  • 1University of British Columbia Pulmonary Research Laboratory, St. Paul's Hospital, Vancouver, Canada.

Journal of Applied Physiology (Bethesda, Md. : 1985)
|January 1, 1991
PubMed
Summary
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The lung sequesters monocytes, forming a large marginating pool. This study confirms the lung

Area of Science:

  • Immunology
  • Hematology
  • Pulmonary Medicine

Background:

  • Previous studies suggest the lung sequesters monocytes, impacting their kinetics.
  • Concerns exist that monocyte isolation procedures may alter their behavior.
  • The lung is the initial capillary bed for intravenously injected monocytes.

Purpose of the Study:

  • To investigate the distribution and behavior of isolated monocytes in vivo.
  • To determine if the lung harbors a significant marginating pool of monocytes.
  • To assess monocyte kinetics independent of isolation artifacts.

Main Methods:

  • Comparison of radiolabeled monocyte distribution after intravenous vs. intra-arterial injection.
  • Quantification of monocyte recovery in various organs at 10 minutes post-injection.

Related Experiment Videos

  • Analysis of lung-to-blood monocyte ratios and retention proportionality.
  • Main Results:

    • First-pass lung extraction of monocytes was 86.5%.
    • After 10 minutes, lungs retained 35.5% (IV) and 29.7% (IA) of monocytes.
    • The lung marginating pool was 5-7 times larger than the circulating pool.

    Conclusions:

    • The lung contains a substantial marginating pool of monocytes.
    • Monocyte retention in the lung correlates with erythrocyte transit time.
    • Monocytes may accumulate in the lung for subsequent migration into lung tissues.