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Related Experiment Videos

Differences between bone marrow and lung endothelial cells

K Imai1, M Kobayashi

  • 1Laboratory of Pathology, Cancer Institute, Hokkaido University School of Medicine, Sapporo, Japan.

Seminars in Thrombosis and Hemostasis
|August 13, 1998
PubMed
Summary
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Hematopoietic progenitor cells specifically migrate through bone marrow endothelial cells, not lung cells. This bone marrow specificity, mediated by vascular cell adhesion molecule-1 (VCAM-1), is crucial for cell homing.

Area of Science:

  • Hematology
  • Cell Biology
  • Immunology

Background:

  • Hematopoietic progenitor cells (HPCs) are crucial for blood formation and immune reconstitution.
  • Understanding the mechanisms of HPC homing to the bone marrow is vital for stem cell transplantation and regenerative medicine.

Purpose of the Study:

  • To investigate the cellular mechanisms underlying the selective homing of hematopoietic progenitor cells to the bone marrow.
  • To determine the role of endothelial cells in regulating HPC transmigration.

Main Methods:

  • Established distinct endothelial cell lines from bone marrow and lung tissue.
  • Utilized a Transwell migration assay to assess HPC transmigration across these endothelial cell layers.
  • Investigated the effect of anti-vascular cell adhesion molecule (VCAM)-1 antibody on HPC migration.

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Main Results:

  • Hematopoietic progenitor cells demonstrated significant transmigration through bone marrow endothelial cells.
  • HPCs showed minimal to no transmigration through lung endothelial cells.
  • The transmigration of HPCs through bone marrow endothelial cells was significantly inhibited by anti-VCAM-1 antibody.

Conclusions:

  • Transendothelial migration of hematopoietic progenitor cells is specific to bone marrow endothelial cells.
  • Vascular cell adhesion molecule-1 (VCAM-1) plays a critical role in mediating this specific homing.
  • These findings highlight a key mechanism for the selective lodging of hematopoietic progenitor cells in the bone marrow.