Type I collagen D-spacing in fibril bundles of dermis, tendon, and bone: bridging between nano- and micro-level tissue hierarchy.

Type I collagen D-spacing in fibril bundles of dermis, tendon, and bone: bridging between nano- and micro-level tissue hierarchy.
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DOI:
10.1021/nn302483x
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发表时间:
2012-11-27
期刊:
影响因子:
17.1
通讯作者:
Holl, Mark M. Banaszak
Holl, Mark M. Banaszak
中科院分区:
材料科学1区
文献类型:
--
作者:
Fang, Ming;Goldstein, Elizabeth L.;Turner, A. Simon;Les, Clifford M.;Orr, Bradford G.;Fisher, Gary J.;Welch, Kathleen B.;Rothman, Edward D.;Holl, Mark M. Banaszak

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Fibrillar collagens in connective tissues are organized into complex and diverse hierarchical networks. In dermis, bone and tendon, one common phenomenon at the micrometer scale is the organization of fibrils into bundles. Previously we have reported that collagen fibrils in these tissues exhibit a 10 nm width distribution of D-spacing values. This study expands the observation to a higher hierarchical level by examining fibril D-spacing distribution in relation to the bundle organization. We used Atomic Force Microscopy (AFM) imaging and two dimensional Fast Fourier Transform (2D FFT) analysis to investigate dermis, tendon and bone tissues. We found that in each tissue type, collagen fibril D-spacings within a single bundle were nearly identical, and frequently differing by less than 1 nm. The full 10 nm range in D-spacing values arises from different values found in different bundles. The similarity in D-spacing was observed to persist for up to 40 µm in bundle length and width. A nested mixed model analysis of variance examining 107 bundles and 1710 fibrils from dermis, tendon and bone indicated that fibril D-spacing differences arise primarily at the bundle level (~76%), independent of species or tissue types.
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