Nanoscale structure of type I collagen fibrils: quantitative measurement of D-spacing.

Nanoscale structure of type I collagen fibrils: quantitative measurement of D-spacing.
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DOI:
10.1002/biot.201200174
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发表时间:
2013-01
影响因子:
4.7
通讯作者:
Holl, Mark M. Banaszak
Holl, Mark M. Banaszak
中科院分区:
工程技术2区
文献类型:
--
作者:
Erickson, Blake;Fang, Ming;Wallace, Joseph M.;Orr, Bradford G.;Les, Clifford M.;Holl, Mark M. Banaszak

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本文详细介绍了一种定量方法来测量的D-周期间距的I型胶原纤维,使用原子力显微镜加上分析,使用二维快速傅立叶变换的方法。仪器校准,数据采样和数据分析都进行了讨论和比较的电子显微镜和X射线散射的互补方法的数据。提供了这种新方法在雌激素耗竭和成骨不全疾病模型中分析I型胶原形态的应用实例。我们证明,这是D-间距分布,而不是D-间距的平均值,显示与早期骨质疏松症和成骨不全相关的雌激素耗竭的统计学显着差异。定量表征I型胶原原纤维的纳米级形态特征的能力将在许多研究领域提供关于I型胶原的重要结构信息,包括组织衰老和疾病、组织工程和基因敲除研究。此外,我们还设想了潜在的临床应用,包括在疾病或药物治疗的影响下评估组织胶原蛋白的完整性。
This paper details a quantitative method to measure the D-periodic spacing of Type I collagen fibrils using Atomic Force Microscopy coupled with analysis using a 2D Fast Fourier Transform approach. Instrument calibration, data sampling and data analysis are all discussed and comparisons of the data to the complementary methods of electron microscopy and X-ray scattering are made. Examples of the application of this new approach to the analysis of Type I collagen morphology in disease models of estrogen depletion and Osteogenesis Imperfecta are provided. We demonstrate that it is the D-spacing distribution, not the D-spacing mean, that showed statistically significant differences in estrogen depletion associated with early stage Osteoporosis and Osteogenesis Imperfecta. The ability to quantitatively characterize nanoscale morphological features of Type I collagen fibrils will provide important structural information regarding Type I collagen in many research areas, including tissue aging and disease, tissue engineering, and gene knock out studies. Furthermore, we also envision potential clinical applications including evaluation of tissue collagen integrity under the impact of diseases or drug treatments.
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