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Ultrastructural Studies of Aortic Endothelial Injury and Regeneration.
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Original Article Ultrastructural Studies of Aortic Endothelial Injury and Regeneration.
Gium Mi Jang, Dong Hoon Kim, Jyung Sik Kwak, Tae Joong Sohn
Journal of Pathology and Translational Medicine 1990;24(4):337-348
DOI: https://doi.org/
Department of Pathology, School of Medicine, Kyungpook National University, Taegu, Korea.
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Author performed this experiment to define the most important factor preventing the intimal thickening. An endothelium of abdominal aorta in the rat was denuded by two different wires having same caliver. The degree of injury was limited to the endothelial cells in one, and extended to the internal elastic lamina in another. The results showed that at 72 hours, in the case of superficial injury, the entire injury site was covered by new regenerating cells, but in the case of disruption of the internal elastic lamina, the migrating smooth muscle cell completely reached into the intima and resulted in intemal thickening. Similar findings persisted to 1 week later. Above results suggest the most important factor preventing the intimal thickening in endothelial injury is the depth of the injury which limited within the endothelial cells without extending into the internal elastic lamina and medial smooth muscle cells.

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