Clinical isolation and functional characterization of cord blood CD133+ hematopoietic progenitor cells

Transfusion
Giuseppina BonannoLuca Pierelli

Abstract

Human cord blood is a relevant source of CD133+ HPCs. Clinical-scale isolation of human umbilical cord blood (UCB) CD133+ HPCs using immunomagnetic microbeads and the CliniMACS clinical cell isolator is reported. CD133+ HPCs isolated after large-scale processing were functionally characterized. Closed disposable sets were used to process nine different samples of RBC-reduced UCB nucleated cells. In-vitro hematopoietic assays and human xenografts in NOD/SCID mice were performed to assess the functional properties of isolated CD133+ cells. Different mixtures of human cytokines were tested for the ability to expand nascent CD133+ HPCs. Furthermore, freshly isolated CD133+ cells were conditioned in culture medium specifically tested to support in-vitro myogenesis or osteogenesis. Isolation procedures yielded the recovery of an average of 2.53 x 10(6) CD133+ HPCs with a mean recovery of 96 percent (referred to as RBC-reduced samples) and a final sample purity of 82 percent. Purified CD133+ cells had high cloning efficiency, had relevant long-term activity, and were capable of repopulating irradiated NOD/SCID mice. In 10-day stroma-free cultures, a 2-fold and 8.3-fold expansion of colony-forming cells (CFCs) and extended long-term cu...Continue Reading

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Citations

Oct 30, 2010·Nature Protocols·Ashok Kumar, Akshay Srivastava
Sep 25, 2008·Stem Cells and Development·Vincent ZangiacomiFrédéric Deschaseaux
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