In patients with an ascending aorta aneurysm, restructuring of all its layers and, first of all, the intima and media was revealed. The thickness of the intima was 79.3±63.1 μm in patients with aortic diameter <55 mm (group Ao<55) and 162.7±177.4 μm (p<0.05) in patients with aortic diameter ⩾55 mm (Ao⩾55 group), the thickness of the aortic media was 1184.0±198.2 and 1144.3±288.4 μm, respectively. In patients of the Ao<55 group, aortic dilatation was accompanied by compensatory thickening of the inner and middle layers of the aorta. In the Ao⩾55 group, thinning of the aortic media, fragmentation of elastic fibers, and its cystic degeneration were revealed. c-kit+ Stem cells were detected in the subendothelium of the thickened intima of the dilated ascending aorta. The appearance of c-kit+ cells correlated with intimal remodeling and its colonization with CD34+ and CD44+ myofibroblast-like cells.
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Translated from Kletochnye Tekhnologii v Biologii i Meditsine, No. 1, pp. 52-61, March, 2023
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Sukhacheva, T.V., Penyaeva, E.V., Soborov, M.A. et al. Morphological Features of the Ascending Aorta Remodeling and Activation of Regeneratory Potential in Intima when Forming Aneurysm. Bull Exp Biol Med 175, 162–171 (2023). https://doi.org/10.1007/s10517-023-05829-8
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DOI: https://doi.org/10.1007/s10517-023-05829-8