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2015 ; 205
(ä): 128-33
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Development of porous PLGA/PEI1 8k biodegradable microspheres for the delivery of
mesenchymal stem cells (MSCs)
#MMPMID25575866
Lee YS
; Lim KS
; Oh JE
; Yoon AR
; Joo WS
; Kim HS
; Yun CO
; Kim SW
J Control Release
2015[May]; 205
(ä): 128-33
PMID25575866
show ga
Multipotent mesenchymal stem cells (MSCs) promise a therapeutic alternative for
many debilitating and incurable diseases. However, one of the major limitations
for the therapeutic application of human MSC (hMSC) is the lengthy ex vivo
expansion time for preparing a sufficient amount of cells due to the low
engraftment rate after transplantation. To solve this conundrum, a porous
biodegradable polymeric microsphere was investigated as a potential scaffold for
the delivery of MSCs. The modified water/oil/water (W1/O/W2) double emulsion
solvent evaporation method was used for the construction of porous microspheres.
PEI1.8k was blended with poly(lactic-co-glycolic acid) (PLGA) to enhance
electrostatic cellular attachment to the microspheres. The porous PLGA/PEI1.8k
(PPP) particles demonstrated an average particle size of 290?m and an average
pore size of 14.3?m, providing a micro-carrier for the MSC delivery. PPP
particles allowed for better attachment of rMSCs than non-porous PLGA/PEI1.8k
(NPP) particles and non-porous (NP) and porous PLGA (PP) microspheres. rMSC
successfully grew on the PPP particles for 2weeks in vitro. Next, PPP particles
loaded with 3 different amounts of hMSC showed increased in vivo engraftment
rates and maintained the stemness characteristics of hMSC compared with
hMSCs-alone group in rats 2weeks after intramyocardial administration. These
customized PPP particles for MSC delivery are a biodegradable and injectable
scaffold that can be used for clinical applications.