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Scientific article
Open access
English

Injectable, scalable 3D tissue-engineered model of marrow hematopoiesis

Published inBiomaterials, vol. 232, 119665
Publication date2020
Abstract

Modeling the interaction between the supportive stroma and the hematopoietic stem and progenitor cells (HSPC) is of high interest in the regeneration of the bone marrow niche in blood disorders. In this work, we present an injectable co-culture system to study this interaction in a coherent in vitro culture and in vivo transplantation model. We assemble a 3D hematopoietic niche in vitro by co-culture of supportive OP9 mesenchymal cells and HSPCs in porous, chemically defined collagen-coated carboxymethylcellulose microscaffolds (CCMs). Flow cytometry and hematopoietic colony forming assays demonstrate the stromal supportive capacity for in vitro hematopoiesis in the absence of exogenous cytokines. After in vitro culture, we recover a paste-like living injectable niche biomaterial from CCM co-cultures by controlled, partial dehydration. Cell viability and the association between stroma and HSPCs are maintained in this process. After subcutaneous injection of this living artificial niche in vivo, we find maintenance of stromal and hematopoietic populations over 12 weeks in immunodeficient mice. Indeed, vascularization is enhanced in the presence of HSPCs. Our approach provides a minimalistic, scalable, biomimetic in vitro model of hematopoiesis in a microcarrier format that preserves the HSPC progenitor function, while being injectable in-vivo without disrupting the cell-cell interactions established in vitro.

Keywords
  • Bone marrow niche
  • Minimally invasive
  • Stroma
  • Hematopoietic stem cells
  • Extramedullary Hematopoiesis
  • Scaffold
Citation (ISO format)
TAVAKOL, Daniel Naveed et al. Injectable, scalable 3D tissue-engineered model of marrow hematopoiesis. In: Biomaterials, 2020, vol. 232, p. 119665. doi: 10.1016/j.biomaterials.2019.119665
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Article (Accepted version)
Identifiers
ISSN of the journal0142-9612
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Technical informations

Creation11/11/2020 1:40:00 PM
First validation11/11/2020 1:40:00 PM
Update time03/15/2023 11:23:09 PM
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