Abstract
In this study we examined the effect of the specific gravity of culture medium on the frequency of hematopoietic stem cell (HSC) maintenance. We used a newly developed high-specific-gravity media. Bone marrow cells were isolated and cultured, and HSC activity was evaluated. The number of hematopoietic progenitor/stem cells was markedly higher in the medium with high specific gravity. In high-specific-gravity media, cells did not precipitate, maintenance of HSCs was increased, and there was a concomitant accumulation of β-catenin. This novel technique for maintaining HSC populations provides an important new tool for studies in regenerative medicine.
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