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Elastic fibers in the aortic valve spongiosa: a fresh perspective on its structure and role in overall tissue function.char = T;code = 84 char = h;code = 104 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = s;code = 115 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = y;code = 121 char = ;code = 32 char = c;code = 99 char = h;code = 104 char = a;code = 97 char = r;code = 114 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = z;code = 122 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = l;code = 108 char = a;code = 97 char = s;code = 115 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = b;code = 98 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = s;code = 115 char = t;code = 116 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;code = 32 char = e;code = 101 char = l;code = 108 char = a;code = 97 char = s;code = 115 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = b;code = 98 char = e;code = 101 char = r;code = 114 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = a;code = 97 char = p;code = 112 char = t;code = 116 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = g;code = 103 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ,;code = 44 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = p;code = 112 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = l;code = 108 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = o;code = 111 char = r;code = 114 char = i;code = 105 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = s;code = 115 char = t;code = 116 char = r;code = 114 char = i;code = 105 char = p;code = 112 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = t;code = 116 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = l;code = 108 char = l;code = 108 char = y;code = 121 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = c;code = 99 char = l;code = 108 char = u;code = 117 char = s;code = 115 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ,;code = 44 char = ;code = 32 char = e;code = 101 char = l;code = 108 char = a;code = 97 char = s;code = 115 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = b;code = 98 char = e;code = 101 char = r;code = 114 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = o;code = 111 char = n;code = 110 char = g;code = 103 char = i;code = 105 char = o;code = 111 char = s;code = 115 char = a;code = 97 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = n;code = 110 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = w;code = 119 char = o;code = 111 char = ;code = 32 char = o;code = 111 char = u;code = 117 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = l;code = 108 char = a;code = 97 char = y;code = 121 char = e;code = 101 char = r;code = 114 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = v;code = 118 char = a;code = 97 char = r;code = 114 char = y;code = 121 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = g;code = 103 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = t;code = 116 char = r;code = 114 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = w;code = 119 char = h;code = 104 char = i;code = 105 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = b;code = 98 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = p;code = 112 char = l;code = 108 char = a;code = 97 char = y;code = 121 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = r;code = 114 char = o;code = 111 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = p;code = 112 char = o;code = 111 char = n;code = 110 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = g;code = 103 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = e;code = 101 char = c;code = 99 char = i;code = 105 char = f;code = 102 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = t;code = 116 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = n;code = 110 char = s;code = 115 char = .;code = 46 char = <;code = 60 char = b;code = 98 char = r;code = 114 char = /;code = 47 char = >;code = 62 result sql = This study characterizes the elastic fiber structure within the aortic valve spongiosa, the middle layer of the tri-laminate leaflet. The layer is rich in glycosaminoglycans and proteoglycans, through which it resists compression and lubricates shear between the outer layers. Elastin in this layer forms a fine, interweaving structure, yet it is unclear how this particular structure, which uses elasticity to preload the leaflet, assists spongiosa function. In this study, immunohistochemistry (IHC) and scanning electron microscopy (SEM) are used to characterize spongiosa elastin, as well as investigate regional differences in structure. IHC for elastin highlights an intermediate structure which varies in thickness and density between regions. In particular, the spongiosa elastin is thicker in the hinge and coaptation region than in the belly. SEM of NaOH-digested leaflets shows a rectilinear pattern of elastic fibers in the hinge and coaptation region, as opposed to a radially oriented stripe pattern in the belly. In conclusion, elastic fibers in the spongiosa connect the two outer layers and vary regionally in structure, while possibly playing a role in responding to regionally specific loading patterns.
Publication: Acta Biomater 2011 May ;7(5)::2101-8. :doi: 10.1016/j.actbio.2011.01.022.
Publication Date: 2011 May
Study Author(s): Tseng, H;Grande-Allen, K J;
Institution: Department of Bioengineering, Rice University, Houston, TX 77251-1892, USA.
[email protected]
Shortcut link to this study:
This study characterizes the elastic fiber structure within the aortic valve spongiosa, the middle layer of the tri-laminate leaflet. The layer is rich in glycosaminoglycans and proteoglycans, through which it resists compression and lubricates shear between the outer layers. Elastin in this layer forms a fine, interweaving structure, yet it is unclear how this particular structure, which uses elasticity to preload the leaflet, assists spongiosa function. In this study, immunohistochemistry (IHC) and scanning electron microscopy (SEM) are used to characterize spongiosa elastin, as well as investigate regional differences in structure. IHC for elastin highlights an intermediate structure which varies in thickness and density between regions. In particular, the spongiosa elastin is thicker in the hinge and coaptation region than in the belly. SEM of NaOH-digested leaflets shows a rectilinear pattern of elastic fibers in the hinge and coaptation region, as opposed to a radially oriented stripe pattern in the belly. In conclusion, elastic fibers in the spongiosa connect the two outer layers and vary regionally in structure, while possibly playing a role in responding to regionally specific loading patterns.
PMID: 21255691