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2017 ; 18
(3
): 383-396
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Optimized decellularization protocol including ?-Gal epitope reduction for
fabrication of an acellular porcine annulus fibrosus scaffold
#MMPMID28342099
Wu LC
; Kuo YJ
; Sun FW
; Chen CH
; Chiang CJ
; Weng PW
; Tsuang YH
; Huang YY
Cell Tissue Bank
2017[Sep]; 18
(3
): 383-396
PMID28342099
show ga
Recent advances in tissue engineering have led to potential new strategies,
especially decellularization protocols from natural tissues, for the repair,
replacement, and regeneration of intervertebral discs. This study aimed to
validate our previously reported method for the decellularization of annulus
fibrosus (AF) tissue and to quantify potentially antigenic ?-Gal epitopes in the
decellularized tissue. Porcine AF tissue was decellularized using different
freeze-thaw temperatures, chemical detergents, and incubation times in order to
determine the optimal method for cell removal. The integrity of the
decellularized material was determined using biochemical and mechanical tests.
The ?-Gal epitope was quantified before and after decellularization.
Decellularization with freeze-thaw in liquid nitrogen, an ionic detergent (0.1%
SDS), and a 24 h incubation period yielded the greatest retention of GAG and
collagen relative to DNA reduction when tested as single variables. Combined,
these optimal decellularization conditions preserved more GAG while removing the
same amount of DNA as the conditions used in our previous study. Components and
biomechanical properties of the AF matrix were retained. The decellularized AF
scaffold exhibited suitable immune-compatibility, as evidenced by successful in
vivo remodeling and a decrease in the ?-Gal epitope. Our study defined the
optimal conditions for decellularization of porcine AF tissues while preserving
the biological composition and mechanical properties of the scaffold. Under these
conditions, immunocompatibility was evidenced by successful in vivo remodeling
and reduction of the ?-Gal epitope in the decellularized material. Decellularized
AF scaffolds are potential candidates for clinical applications in spinal
surgery.