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Ex Vivo Generation of Human Red Blood Cells: A New Advance in Stem Cell Engineering

  • Luc Douay
  • Marie-Catherine Giarratana
Part of the Methods in Molecular Biology book series (MIMB, volume 482)

Abstract

We describe a technological approach permitting the massive expansion of CD34+ stem cells and their 100% conversion ex vivo into mature red blood cells (RBC). The protocol comprises three steps: a first step consisting of cell proliferation and induction of erythroid differentiation in a liquid medium without serum in the presence of growth factors (GF), a second based on a model reconstitution of the medullar microenvironment (ME) (human MSC or murine stromal cells) in the presence of GF, and a third in the presence of the ME alone, without any GF. This work highlights the impact of the ex vivo microenvironment on the terminal maturation of erythroid cells. A critical point is that the RBC generated in vitro have all the characteristics of functional native adult RBC. Moreover, this new concept of ‘cultured RBC’ (cRBC) is important for basic research into terminal erythropoiesis and has major clinical implications, especially in transfusion medicine. The three-step protocol can be adapted to use hematopoietic stem cells (HSC) from diverse sources: peripheral blood, bone marrow or cord blood.

Key words

Hematopoietic stem cells CD34+ cells erythroid culture terminal differentiation in vitro red blood cell (RBC) production stromal cells three-step protocol functional cultured RBC 

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Copyright information

© Humana Press, a part of Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Luc Douay
    • 1
  • Marie-Catherine Giarratana
    • 2
  1. 1.Unité de recherché, Faculté de Médecine, Université Pierre et Marie CurieFrance
  2. 2.Service d’Hématologie Biologique, Assistance Publique Hôpitaux de Paris, Hôpital Armand TrousseauFrance

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