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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Transl+Res
2015 ; 7
(3
): 558-73
Nephropedia Template TP
gab.com Text
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English Wikipedia
In vitro comparative study of two decellularization protocols in search of an
optimal myocardial scaffold for recellularization
#MMPMID26045895
Perea-Gil I
; Uriarte JJ
; Prat-Vidal C
; Gálvez-Montón C
; Roura S
; Lluciŕ-Valldeperas A
; Soler-Botija C
; Farré R
; Navajas D
; Bayes-Genis A
Am J Transl Res
2015[]; 7
(3
): 558-73
PMID26045895
show ga
INTRODUCTION: Selection of a biomaterial-based scaffold that mimics native
myocardial extracellular matrix (ECM) architecture can facilitate functional cell
attachment and differentiation. Although decellularized myocardial ECM
accomplishes these premises, decellularization processes may variably distort or
degrade ECM structure. MATERIALS AND METHODS: Two decellularization protocols
(DP) were tested on porcine heart samples (epicardium, mid myocardium and
endocardium). One protocol, DP1, was detergent-based (SDS and Triton X-100),
followed by DNase I treatment. The other protocol, DP2, was focused in trypsin
and acid with Triton X-100 treatments. Decellularized myocardial scaffolds were
reseeded by embedding them in RAD16-I peptidic hydrogel with adipose
tissue-derived progenitor cells (ATDPCs). RESULTS: Both protocols yielded
acellular myocardial scaffolds (~82% and ~94% DNA reduction for DP1 and DP2,
respectively). Ultramicroscopic assessment of scaffolds was similar for both
protocols and showed filamentous ECM with preserved fiber disposition and
structure. DP1 resulted in more biodegradable scaffolds (P = 0.04). Atomic force
microscopy revealed no substantial ECM stiffness changes post-decellularization
compared to native tissue. The Young's modulus did not differ between heart
layers (P = 0.69) or decellularization protocols (P = 0.15). After one week,
recellularized DP1 scaffolds contained higher cell density (236 ± 106 and 98 ± 56
cells/mm(2) for recellularized DP1 and DP2 scaffolds, respectively; P = 0.04).
ATDPCs in both DP1 and DP2 scaffolds expressed the endothelial marker isolectin
B4, but only in the DP1 scaffold ATDPCs expressed the cardiac markers GATA4,
connexin43 and cardiac troponin T. CONCLUSIONS: In our hands, DP1 produced
myocardial scaffolds with higher cell repopulation and promotes ATDPCs expression
of endothelial and cardiomyogenic markers.