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Mouse CD24 is required for homeostatic cell renewal.

Vincent Nieoullon¹, Richard Belvindrah, Geneviève Rougon

¹Institut de Biologie du Développement de Marseille Luminy, UMR 6216 Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Campus de Luminy, 13288 Marseille, France.

Cell and Tissue Research

|May 25, 2007

Summary

Mouse CD24 (cluster of differentiation 24) regulates tissue renewal by controlling cell proliferation and differentiation. Deleting CD24 increases cell proliferation, while ectopic expression decreases it, impacting tissue homeostasis.

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Improving the Accuracy of Flow Cytometric Assessment of Mitochondrial Membrane Potential in Hematopoietic Stem and Progenitor Cells Through the Inhibition of Efflux Pumps

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Assessment of Cellular Bioenergetics in Mouse Hematopoietic Stem and Primitive Progenitor Cells using the Extracellular Flux Analyzer

Assessment of Cellular Bioenergetics in Mouse Hematopoietic Stem and Primitive Progenitor Cells using the Extracellular Flux Analyzer

Published on: September 24, 2021

Area of Science:

Cell Biology
Developmental Biology
Immunology

Background:

Adult tissues possess self-renewal capacity through stem, transit-amplifying, and differentiating cells.
Cellular renewal is regulated by cell-cell/matrix interactions and secreted factors.

Purpose of the Study:

To investigate the role of mouse CD24 (cluster of differentiation 24) in regulating homeostatic cell renewal.
To elucidate the mechanism by which CD24 influences the proliferation and differentiation balance.

Main Methods:

Utilized gain and loss of function experiments to assess CD24's role.
Employed Bromodeoxyuridine (BrdU) incorporation assays with optical and electron microscopy.
Performed retroviral infection for ectopic CD24 expression in the embryonic brain.

Main Results:

mCD24-deleted mice exhibited increased cell proliferation in the developing brain and epithelia.
Ectopic CD24 expression in the embryonic brain reduced cell cluster formation.
Mutant skin showed disrupted layers due to ectopic proliferative cells.

Conclusions:

Mouse CD24 (cluster of differentiation 24) is crucial for regulating homeostatic cell renewal.
CD24 controls the proliferation/differentiation balance between transit-amplifying and differentiated cells.
Dysregulation of CD24 impacts tissue organization and cellular homeostasis.