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result sql = Neomycin binding preserves extracellular matrix in bioprosthetic heart valves during in vitro cyclic fatigue and storage.
Neomycin binding preserves extracellular matrix in bioprosthetic heart valves during in vitro cyclic fatigue and storage.
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char = u;code = 117
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char = ;code = 32
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char = a;code = 97
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char = e;code = 101
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char = G;code = 71
char = ;code = 32
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char = c;code = 99
char = c;code = 99
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char = l;code = 108
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char = d;code = 100
char = ;code = 32
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char = a;code = 97
char = t;code = 116
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char = g;code = 103
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char = ;code = 32
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char = d;code = 100
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char = t;code = 116
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char = ;code = 32
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char = e;code = 101
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char = r;code = 114
char = ;code = 32
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char = ;code = 32
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char = T;code = 84
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char = i;code = 105
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char = f;code = 102
char = ;code = 32
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char = o;code = 111
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char = ;code = 32
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char = ;code = 32
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char = r;code = 114
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char = k;code = 107
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char = n;code = 110
char = g;code = 103
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char = c;code = 99
char = o;code = 111
char = u;code = 117
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char = a;code = 97
char = n;code = 110
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char = ;code = 32
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char = i;code = 105
char = s;code = 115
char = s;code = 115
char = u;code = 117
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = t;code = 116
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char = b;code = 98
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char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
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char = n;code = 110
char = d;code = 100
char = ;code = 32
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char = h;code = 104
char = u;code = 117
char = s;code = 115
char = ;code = 32
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char = e;code = 101
char = a;code = 97
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char = ;code = 32
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char = a;code = 97
char = l;code = 108
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = u;code = 117
char = r;code = 114
char = a;code = 97
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
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result sql = Bioprosthetic heart valve (BHV) cusps have a complex architecture consisting of an anisotropic arrangement of collagen, glycosaminoglycans (GAGs) and elastin. Glutaraldehyde (GLUT) is used as a fixative for all clinical BHV implants; however, it only stabilizes the collagen component of the tissue, and other components such as GAGs and elastin are lost from the tissue during processing, storage or after implantation. We have shown previously that the effectiveness of the chemical crosslinking can be increased by incorporating neomycin trisulfate, a hyaluronidase inhibitor, to prevent the enzyme-mediated GAG degradation. In the present study, we optimized carbodiimide-based GAG-targeted chemistry to incorporate neomycin into BHV cusps prior to conventional GLUT crosslinking. This crosslinking leads to enhanced preservation of GAGs during in vitro cyclic fatigue and storage. The neomycin group showed greater GAG retention after both 10 and 50 million accelerated fatigue cycles and after 1 year of storage in GLUT solution. Thus, additional binding of neomycin to the cusps prior to standard GLUT crosslinking could enhance tissue stability and thus heart valve durability.

Publication: Acta Biomater 2009 May ;5(4)::983-92. :doi: 10.1016/j.actbio.2008.11.004.
Publication Date: 2009 May
Study Author(s): Raghavan, Devanathan;Starcher, Barry C;Vyavahare, Naren R;
Institution: Cardiovascular Implant Research Laboratory (CIRL), Department of Bioengineering, Clemson University, 501 Rhodes Hall, Clemson, SC 29634, USA.
Shortcut link to this study:
Bioprosthetic heart valve (BHV) cusps have a complex architecture consisting of an anisotropic arrangement of collagen, glycosaminoglycans (GAGs) and elastin. Glutaraldehyde (GLUT) is used as a fixative for all clinical BHV implants; however, it only stabilizes the collagen component of the tissue, and other components such as GAGs and elastin are lost from the tissue during processing, storage or after implantation. We have shown previously that the effectiveness of the chemical crosslinking can be increased by incorporating neomycin trisulfate, a hyaluronidase inhibitor, to prevent the enzyme-mediated GAG degradation. In the present study, we optimized carbodiimide-based GAG-targeted chemistry to incorporate neomycin into BHV cusps prior to conventional GLUT crosslinking. This crosslinking leads to enhanced preservation of GAGs during in vitro cyclic fatigue and storage. The neomycin group showed greater GAG retention after both 10 and 50 million accelerated fatigue cycles and after 1 year of storage in GLUT solution. Thus, additional binding of neomycin to the cusps prior to standard GLUT crosslinking could enhance tissue stability and thus heart valve durability.
PMID: 19091637

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