Paralog- and ortholog-specificity of inhibitors of human and mouse lipoxygenase-isoforms.

Autor: Kakularam KR; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Biochemistry, Chariteplatz 1, D-10117 Berlin, Germany., Karst F; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Biochemistry, Chariteplatz 1, D-10117 Berlin, Germany., Polamarasetty A; Indian Institute of Petroleum and Energy, Visakhapatnam 530003, Andhra Pradesh, India., Ivanov I; Lomonosov Institute of Fine Chemical Technologies, MIREA - Russian Technological University, Vernadskogo Pr. 86, 119571 Moscow, Russia., Heydeck D; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Biochemistry, Chariteplatz 1, D-10117 Berlin, Germany., Kuhn H; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Biochemistry, Chariteplatz 1, D-10117 Berlin, Germany. Electronic address: hartmut.kuehn@charite.de.
Jazyk: angličtina
Zdroj: Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie [Biomed Pharmacother] 2022 Jan; Vol. 145, pp. 112434. Date of Electronic Publication: 2021 Nov 19.
DOI: 10.1016/j.biopha.2021.112434
Abstrakt: Lipoxygenases (ALOX-isoforms) are lipid peroxidizing enzymes, which have been implicated in cell differentiation and maturation but also in the biosynthesis of lipid mediators playing important roles in the pathogenesis of inflammatory, hyperproliferative and neurological diseases. In mammals these enzymes are widely distributed and the human genome involves six functional genes encoding for six distinct human ALOX paralogs. In mice, there is an orthologous enzyme for each human ALOX paralog but the catalytic properties of human and mouse ALOX orthologs show remarkable differences. ALOX inhibitors are frequently employed for deciphering the biological role of these enzymes in mouse models of human diseases but owing to the functional differences between mouse and human ALOX orthologs the uncritical use of such inhibitors is sometimes misleading. In this study we evaluated the paralog- and ortholog-specificity of 13 frequently employed ALOX-inhibitors against four recombinant human and mouse ALOX paralogs (ALOX15, ALOX15B, ALOX12, ALOX5) under different experimental conditions. Our results indicated that except for zileuton, which exhibits a remarkable paralog-specificity for mouse and human ALOX5, no other inhibitor was strictly paralog specific but some compounds exhibit an interesting ortholog-specificity. Because of the variable isoform specificities of the currently available ALOX inhibitors care must be taken when the biological effects of these compounds observed in complex in vitro and in vivo systems are interpreted.
(Copyright © 2021 The Authors. Published by Elsevier Masson SAS.. All rights reserved.)
Databáze: MEDLINE
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