Estrogen depletion results in nanoscale morphology changes in dermal collagen.

Estrogen depletion results in nanoscale morphology changes in dermal collagen.
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DOI:
10.1038/jid.2012.47
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发表时间:
2012-07
影响因子:
6.5
通讯作者:
Holl, Mark M. Banaszak
Holl, Mark M. Banaszak
中科院分区:
医学1区
文献类型:
--
作者:
Fang, Ming;Liroff, Kaitlin G.;Turner, A. Simon;Les, Clifford M.;Orr, Bradford G.;Holl, Mark M. Banaszak

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组织冷冻切片结合原子力显微镜(AFM)成像揭示了真皮胶原纤维的纳米级形态,使用D-周期间距的度量量化,在雌激素耗竭的条件下发生变化。具体而言,一个新的亚群的原纤维与D-间距在56和59 nm之间的区域是目前两年后,在绵羊皮肤样品卵巢切除术。此外,分布的总体宽度,高于和低于平均值的值,都有所增加。先前报告了绵羊骨的D间距较低值增加导致的宽度变化;然而,本报告表明,该效应也存在于非矿化胶原纤维中。累积密度函数的非参数Kolmogrov-Smirnov检验表明假手术和OVX D间距分布存在统计学差异(p < 0.01)。
Tissue cryo-sectioning combined with Atomic Force Microscopy (AFM) imaging reveals that the nanoscale morphology of dermis collagen fibrils, quantified using the metric of D-periodic spacing, changes under the condition of estrogen depletion. Specifically, a new subpopulation of fibrils with D-spacings in the region between 56 and 59 nm is present two years following ovariectomy in ovine dermal samples. In addition, the overall width of the distribution, both values above and below the mean, has increased. The change in width due to an increase in lower values of D-spacings was previously reported for ovine bone; however, this report demonstrates that the effect is also present in non-mineralized collagen fibrils. A non-parametric Kolmogrov-Smirnov test of the cumulative density function indicates a statistical difference in the sham and OVX D-spacing distributions (p < 0.01).
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