Expansion of engrafting human hematopoietic stem/progenitor cells in three-dimensional scaffolds with surface-immobilized fibronectin.

Published

Journal Article

An efficient and practical ex vivo expansion methodology for human hematopoietic stem/progenitor cells (HSPCs) is critical in realizing the potential of HSPC transplantation in treating a variety of hematologic disorders and as a supportive therapy for malignant diseases. We report here an expansion strategy using a three-dimensional (3D) scaffold conjugated with an extracellular matrix molecule, fibronectin (FN), to partially mimic the hematopoietic stem cell niche. FN-immobilized 3D polyethylene terephthalate (PET) scaffold was synthesized and evaluated for HSPC expansion efficiency, in comparison with a FN-immobilized 2D PET substrate and a 3D scaffold with FN supplemented in the medium. Covalent conjugation of FN produced substrate and scaffold with higher cell expansion efficiency than that on their unmodified counterparts. After 10 days of culture in serum-free medium, human umbilical cord blood CD34+ cells cultured in FN-conjugated scaffold yielded the highest expansion of CD34+ cells (approximately 100 fold) and long-term culture initiating cells (approximately 47-fold). The expanded human CD34+ cells successfully reconstituted hematopoiesis in NOD/SCID mice. This study demonstrated the synergistic effect between the three-dimensionality of the scaffold and surface-conjugated FN, and the potential of this FN-conjugated 3D scaffold for ex vivo expansion of HSPCs.

Full Text

Cited Authors

  • Feng, Q; Chai, C; Jiang, X-S; Leong, KW; Mao, H-Q

Published Date

  • September 2006

Published In

Volume / Issue

  • 78 / 4

Start / End Page

  • 781 - 791

PubMed ID

  • 16739181

Pubmed Central ID

  • 16739181

Electronic International Standard Serial Number (EISSN)

  • 1552-4965

International Standard Serial Number (ISSN)

  • 1549-3296

Digital Object Identifier (DOI)

  • 10.1002/jbm.a.30829

Language

  • eng