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Journal of Histochemistry and Cytochemistry, Vol. 51, 125-127, January 2003, Copyright © 2003, The Histochemical Society, Inc.

BRIEF REPORT

Localization of EP24.15, a Major Liver Kininase

Luciana Gioli–Pereiraa, José D. Fontenele–Netob, Durval R. Borgesa, and Maria Kouyoumdjiana
a Laboratory of Experimental Hepatology, Universidade Federal de São Paulo, São Paulo, Brazil
b Department of Histology and Embryology, Biomedical Sciences Institute, USP, São Paulo, Brazil

Correspondence to: Durval R. Borges, Rua Jabuticabeiras 807, 05674-011 São Paulo, Brazil. E-mail: drborges@epm.br

The liver is important for the kallikrein–kinin system modulation. This system plays a role in the inflammatory cascade with anticoagulant, profibrinolytic, and anti-adhesive attributes. The metalloendopeptidase EP24.15 is a major hepatic kininase. We studied the tissue distribution and subcellular localization of this enzyme in rat liver by cell fractionation and immunohistochemistry. Our results showed that EP24.15 is predominant in the soluble fraction of the liver homogenate and is present in the cytoplasm of hepatocytes, particularly in the perivenous zone (Z3). This localization is relevant because most hepatotoxin-induced necrosis, as well as ischemic hepatocellular injury, is predominant in Z3. (J Histochem Cytochem 51:125–127, 2003)

Key Words: bradykinin, kininase, endopeptidase-24.15, liver


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