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- W2179104771 abstract "Dissecting aortic aneurysm (DAA) is an extended tear in the wall of the aorta along the plane of the vascular media. Our previous studies indicated in a developmental animal model, that DAA was related to pathological alteration in collagen, especially collagen type III. Accordingly, in the present studies, neonatal aortic vascular smooth muscle cells (VSMC) and timed pregnant Sprague-Dawley rat dams were treated with N-(2-aminoethyl) ethanolamine (AEEA), which, as shown previously, causes DAA in offspring. Morphological changes in extracellular matrix (ECM) produced by VSMC in vitro were detailed with scanning electron microscopy (SEM), and biochemical changes in cells and ECM produced by VSMCs were defined by Western blotting. Biophysical changes of the collagen extracted from both the ECM produced by VSMC and extracted from fetal rat aortas were studied with atomic force microscopy (AFM). ECM disruption and irregularities were observed in VSMCs treated with AEEA by SEM. Western blotting showed that collagen type I was much more extractable, accompanied by a decrease of the pellet size after urea buffer extraction in the AEEA-treated VSMC when compared with the control. AFM found that collagen samples extracted from the fetal rat aortas of the AEEA-treated dam, and in the in vitro formed ECM prepared by decellularization, became stiffer, or more brittle, indicating that the 3D organization associated with elasticity was altered by AEEA exposure. Our results show that AEEA causes significant morphological, biochemical, and biomechanical alterations in the ECM. These in vitro and in vivo strategies are advantageous in elucidating the underlying mechanisms of DAA." @default.
- W2179104771 created "2016-06-24" @default.
- W2179104771 creator A5008627573 @default.
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- W2179104771 creator A5064271606 @default.
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- W2179104771 creator A5083604223 @default.
- W2179104771 date "2015-10-05" @default.
- W2179104771 modified "2023-09-26" @default.
- W2179104771 title "N-(2-Aminoethyl) Ethanolamine-Induced Morphological, Biochemical, and Biophysical Alterations in Vascular Matrix Associated With Dissecting Aortic Aneurysm" @default.
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- W2179104771 doi "https://doi.org/10.1093/toxsci/kfv194" @default.
- W2179104771 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5009440" @default.
- W2179104771 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26443843" @default.
- W2179104771 hasPublicationYear "2015" @default.