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2015 ; 47
(ä): 1-12
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Enhanced survival and engraftment of transplanted stem cells using growth factor
sequestering hydrogels
#MMPMID25682155
Jha AK
; Tharp KM
; Ye J
; Santiago-Ortiz JL
; Jackson WM
; Stahl A
; Schaffer DV
; Yeghiazarians Y
; Healy KE
Biomaterials
2015[Apr]; 47
(ä): 1-12
PMID25682155
show ga
We have generated a bioinspired tunable system of hyaluronic acid (HyA)-based
hydrogels for Matrix-Assisted Cell Transplantation (MACT). With this material, we
have independently evaluated matrix parameters such as adhesion peptide density,
mechanical properties, and growth factor sequestering capacity, to engineer an
environment that imbues donor cells with a milieu that promotes survival and
engraftment with host tissues after transplantation. Using a versatile population
of Sca-1(+)/CD45(-) cardiac progenitor cells (CPCs), we demonstrated that the
addition of heparin in the HyA hydrogels was necessary to coordinate the
presentation of TGF?1 and to support the trophic functions of the CPCs via
endothelial cell differentiation and vascular like tubular network formation.
Presentation of exogenous TGF?1 by binding with heparin improved differentiated
CPC function by sequestering additional endogenously-produced angiogenic factors.
Finally, we demonstrated that TGF?1 and heparin-containing HyA hydrogels can
promote CPC survival when implanted subcutaneously into murine hind-limbs and
encouraged their participation in the ensuing neovascular response, which
included blood vessels that had anastomosed with the host's blood vessels.
|*Stem Cell Transplantation
[MESH]
|Animals
[MESH]
|Binding Sites
[MESH]
|Biocompatible Materials/chemistry
[MESH]
|Cell Adhesion
[MESH]
|Cell Differentiation
[MESH]
|Cell Proliferation
[MESH]
|Cell Survival
[MESH]
|Heparin/chemistry
[MESH]
|Hyaluronic Acid/chemistry
[MESH]
|Hydrogels/*chemistry
[MESH]
|Intercellular Signaling Peptides and Proteins/*metabolism
[MESH]