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Related Experiment Videos

Age-related decrease in the number of hemopoietic stem cells and progenitors in senescence accelerated mice.

H Izumi-Hisha1, Y Ito, K Sugimoto

  • 1Department of Hygiene, Aichi Medical University, Japan.

Mechanisms of Ageing and Development
|October 1, 1990
PubMed
Summary

Aging impairs hematopoietic stem cells (HSCs) and progenitor cells in senescence accelerated mice (SAM-P). This study reveals reduced leukocyte counts in older SAM-P mice, suggesting a potential model for aging hematopoiesis research.

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Area of Science:

  • Gerontology
  • Hematology
  • Immunology

Background:

  • Aging leads to significant changes in the hematopoietic system.
  • Understanding the aging of hemopoiesis is crucial for age-related disease research.

Purpose of the Study:

  • To investigate the aging process of hemopoiesis using senescence accelerated mice (SAM-P).
  • To identify age-related changes in hematopoietic stem cells (HSCs) and progenitor cells.

Main Methods:

  • Utilized senescence accelerated mice (SAM-P) to model aging.
  • Quantified peripheral leukocyte counts and hematocrit.
  • Assessed bone marrow and spleen cellularity, including hematopoietic stem cells (colony-forming unit-spleen, CFU-S) and granulocyte-macrophage colony-forming cells (GM-CFC).

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Main Results:

  • Old SAM-P mice showed a significant decrease in peripheral leukocytes and a slight decrease in hematocrit.
  • Bone marrow cellularity increased, but hematopoietic stem cells (CFU-S) and granulocyte-macrophage colony-forming cells (GM-CFC) decreased in old mice.
  • A significant reduction in spleen GM-CFC was observed in old SAM-P mice, while CFU-S numbers remained unchanged.

Conclusions:

  • Reduced recruitment of GM-CFC from CFU-S in the spleen, coupled with diminished bone marrow hematopoiesis, likely causes decreased peripheral leukocyte counts in aging SAM-P mice.
  • SAM-P mice represent a valuable model for studying the aging of the hematopoietic system.