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Title: Enhanced expression of endothelin-1 and endothelinconverting enzyme-1 in acute hypoxic rat aorta
Issue Date: 2002
Publisher: Murcia : F. Hernández
ISSN: 0213-3911
Related subjects: CDU::6 - Ciencias aplicadas::61 - Medicina
Keywords: Hypoxia
Rat aorta
Abstract: Deeply anesthetized male Wistar rats were perfused by Hanks’ balanced salt solution bubbled with either 95%air and 5%CO2 (normoxic group) or 95%N2 and 5%CO2 (hypoxic group) from the thoracic aorta for 30 min, and the isolated abdominal aortae from both groups were used for electron microscopy, immunocytochemistry of endothelin (ET)-1 and ETconverting enzyme (ECE)-1, and in situ hybridization of p r e p r o E T-1 mRNA. A remarkable increase in the number of Weibel-Palade (WP) bodies, storage sites of E T-1 and ECE-1, occurred in the hypoxic group when compared to the normoxic group. Immunoreactivities for E T-1 and ECE-1, and signals for preproET-1 mRNA were seen along the endothelia of both groups, but the intensities were significantly elevated in the hypoxic group. The increase in the number of ECE-1 immunoreactive gold particles was noticed especially in WP bodies in the hypoxic group. These findings indicate the enhancement of preproET-1 synthesis in the aortic endothelial cells as well as the acceleration of ET- 1 processing in increased WP bodies in such cells in an experimentally hypoxic condition of the rat aortae.
Primary author: Doi, Y.
Kudo, H.
Nishino, T.
Yamamoto, O.
Nagata, T.
Nara, S.
Morita, M.
Fujimoto, S.
Published in: Histology and histopathology
Document type: info:eu-repo/semantics/article
Number of pages / Extensions: 9
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:Vol.17, nº 1 (2002)

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