title: N-Acylethanolamines Bind to SIRT6.
abstract: Sirtuin 6 (SIRT6) is an NAD+-dependent histone deacetylase enzyme that is involved in multiple molecular pathways related to aging. Initially, it was reported that SIRT6 selectively deacetylated H3K9Ac and H3K56Ac; however, it has more recently been shown to preferentially hydrolyze long-chain fatty acyl groups over acetyl groups in vitro. Subsequently, fatty acids were demonstrated to increase the catalytic activity of SIRT6. In this study, we investigated whether a series of N-acylethanolamines (NAEs), quercetin, and luteolin could regulate SIRT6 activity. NAEs increased SIRT6 activity, with oleoylethanolamide having the strongest activity (EC50 value of 3.1 μm). Quercetin and luteolin were demonstrated to have dual functionality with respect to SIRT6 activity; namely, they inhibited SIRT6 activity with IC50 values of 24 and 2 μm, respectively, and stimulated SIRT6 activity more than sixfold (EC50 values of 990 and 270 μm, respectively).
authors.affiliation: Bioanalytical Chemistry and Drug Screening Centre, Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Suite 100, Biomedical Research Center, 251 Bayview Boulevard, Baltimore, MD, 21224-6825, USA.|School of Pharmacy, University of Eastern Finland, Yliopistonranta 1C, Kuopio, 70210, Finland.
authors.forename: Minna
authors.initials: M
authors.lastname: Rahnasto-Rilla
authors.affiliation: School of Pharmacy, University of Eastern Finland, Yliopistonranta 1C, Kuopio, 70210, Finland.
authors.forename: Tarja
authors.initials: T
authors.lastname: Kokkola
authors.affiliation: School of Pharmacy, University of Eastern Finland, Yliopistonranta 1C, Kuopio, 70210, Finland.
authors.forename: Elina
authors.initials: E
authors.lastname: Jarho
authors.affiliation: School of Pharmacy, University of Eastern Finland, Yliopistonranta 1C, Kuopio, 70210, Finland.
authors.forename: Maija
authors.initials: M
authors.lastname: Lahtela-Kakkonen
authors.affiliation: Bioanalytical Chemistry and Drug Screening Centre, Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Suite 100, Biomedical Research Center, 251 Bayview Boulevard, Baltimore, MD, 21224-6825, USA. moaddelru@grc.nia.nih.gov.
authors.forename: Ruin
authors.initials: R
authors.lastname: Moaddel
mesh_terms: D004983:Ethanolamines / Q000737:chemistry* / Q000378:metabolism; D006801:Humans; D015394:Molecular Structure; D037761:Sirtuins / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism
chemical_list: D004983:Ethanolamines; C022203:N-acylethanolamines; C516592:SIRT6 protein, human; D037761:Sirtuins
keywords: enzymes; ethanolamides; natural products; quercetin; sirtuins