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Title: The toxic effects of bis (tributyltin) oxide on the rat thoracic aorta
Issue Date: 1992
Publisher: Murcia : F. Hernández
ISSN: 0213-3911
Related subjects: CDU::6 - Ciencias aplicadas::61 - Medicina
Keywords: Aorta
Abstract: The toxic effects of bis (tributyltin) oxide (TBTO) on the ultrastructure and permeability of rat thoracic aorta were studied electron microscopically and the accumulation sites of tin were determined with an X-ray microanalyzer. Male Wistar rats received O.O5ml/kg of TBTO as an emulsion in 1 m1 of distilled water througb a stomach tube. After time intervals of 2, 4, 6, 8, 10, 12 h after intubation, thoracic aortae were isolated and prepared for electron microscopy. Marked swelling of mitochondria in the aortic endothelial cells appeared at 4 h after TBTO treatment. By x-ray microanalysis, tin L-a peaks (3.44 keV) were obtained from these swollen mitochondria. Subendothelial edema progressed between 6 and 8 h after TBTO treatment. By tracer experiment, it was seen that large amounts of peroxidase reaction products filled the expanded subendothelial space. At 12 h after TBTO treatment, degenerative changes of the endothelial cells were prominent. These results indicated that orally administered TBTO accumulated in the mitochondria of the endothelial cells of thoracic aorta. The direct toxic effects of TBTO on mitochondria might induce severe damage to the endothelial cells and cause disturbance of the permeability barrier function of the endothelial layer and subendothelial edema.
Primary author: Yoshizuka, M.
Hara, K.
Doi, K.
Mori, Naoki
Yokoyama, M.
Ono, Eizo
Fujimoto, Sunao
Published in: Histology and histopathology
Document type: info:eu-repo/semantics/article
Number of pages / Extensions: 5
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:Vol. 7, nº 3 (1992)

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