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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Local distribution of collagen fibers determines crack initiation site and its propagation direction during aortic rupture

http://hdl.handle.net/2237/00028344
d1461f7d-23e9-4495-ad7f-741172f4a6e2
名前 / ファイル ライセンス アクション
SugitaBMMB18.pdf SugitaBMMB18 (1.4 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2018-07-04
タイトル
タイトル Local distribution of collagen fibers determines crack initiation site and its propagation direction during aortic rupture
著者 Sugita, Shukei

× Sugita, Shukei

WEKO 78421

Sugita, Shukei

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Matsumoto, Takeo

× Matsumoto, Takeo

WEKO 78422

Matsumoto, Takeo

Search repository
権利
権利情報 “This is a post-peer-review, pre-copyedit version of an article published in [Biomechanics and Modeling in Mechanobiology]. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10237-017-0979-2”.
キーワード
主題Scheme Other
主題 Thoracic aorta
キーワード
主題Scheme Other
主題 Biaxial stretch rupture
キーワード
主題Scheme Other
主題 Local composition
キーワード
主題Scheme Other
主題 Second harmonic imaging microscopy
キーワード
主題Scheme Other
主題 Birefringence imaging microscopy
抄録
内容記述 Although elucidation of the mechanism of aortic aneurysm rupture is important, the characteristics of crack initiation and propagation sites remain unknown. To determine the microscopic properties of these sites, the characteristics of local strains and constituents at crack initiation and propagation sites were investigated during biaxial stretching of porcine thoracic aortas (PTAs). PTAs were sliced into approximately 50-μm-thick sections, and the center of the sections was made especially thin using our previously developed technique. Alpha-elastin and cell nuclei were fluorescently labeled as indices of local elastin density and as a strain marker, respectively. Birefringence and second harmonic generation (SHG) light images were used to determine local collagen distributions. The specimens were then stretched biaxially with a laboratory-made tensile tester under a fluorescent microscope equipped with a birefringence imaging system. Local strains were calculated from the local displacement of the cell nuclei. The degree of alignment and density of local collagen fibers were measured from retardance and SHG images. The strain distributions, specifically the first and second principal, and maximum shear strains, fluorescent intensity of α-elastin, and degree of alignment of collagen fibers, showed insignificant differences between the crack initiation sites and other sites. The retardance and intensity of SHG light at the crack initiation sites were significantly lower than those at other sites for all (n=6) specimens. Cracks tended to propagate along the local direction of the collagen fibers. These results indicate that the local density and direction of collagen fibers play an important role in aorta rupture.
内容記述タイプ Abstract
内容記述
内容記述 ファイル公開:2019/04/01
内容記述タイプ Other
出版者
出版者 Springer
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
DOI
関連識別子
識別子タイプ DOI
関連識別子 https://doi.org/10.1007/s10237-017-0979-2
ISSN
収録物識別子タイプ ISSN
収録物識別子 1617-7959
書誌情報 Biomechanics and Modeling in Mechanobiology

巻 17, 号 2, p. 577-587, 発行日 2018-04
著者版フラグ
値 author
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