Insulin-independent stimulation of skeletal muscle glucose uptake by low-dose abscisic acid via AMPK activation.

Autor: Magnone M; Department of Experimental Medicine, Section of Biochemistry, University of Genova, Viale Benedetto XV, 1, 16132, Genova, Italy. mirko.magnone@unige.it.; Nutravis S.r.l., Via Corsica 2/19, 16128, Genova, Italy. mirko.magnone@unige.it., Emionite L; Animal Facility, IRCCS Ospedale Policlinico San Martino, Largo Benzi 10, 16132, Genova, Italy., Guida L; Department of Experimental Medicine, Section of Biochemistry, University of Genova, Viale Benedetto XV, 1, 16132, Genova, Italy., Vigliarolo T; Department of Experimental Medicine, Section of Biochemistry, University of Genova, Viale Benedetto XV, 1, 16132, Genova, Italy., Sturla L; Department of Experimental Medicine, Section of Biochemistry, University of Genova, Viale Benedetto XV, 1, 16132, Genova, Italy., Spinelli S; Department of Experimental Medicine, Section of Biochemistry, University of Genova, Viale Benedetto XV, 1, 16132, Genova, Italy., Buschiazzo A; Nuclear Medicine, IRCCS Ospedale Policlinico San Martino, Largo Benzi 10, 16132, Genova, Italy., Marini C; Nuclear Medicine, IRCCS Ospedale Policlinico San Martino, Largo Benzi 10, 16132, Genova, Italy.; CNR Institute of Bioimages and Molecular Physiology, Milan, Italy.; Department of Health Sciences, Via A. Pastore 1, Genova, Italy., Sambuceti G; Nuclear Medicine, IRCCS Ospedale Policlinico San Martino, Largo Benzi 10, 16132, Genova, Italy.; CNR Institute of Bioimages and Molecular Physiology, Milan, Italy.; Department of Health Sciences, Via A. Pastore 1, Genova, Italy., De Flora A; Department of Experimental Medicine, Section of Biochemistry, University of Genova, Viale Benedetto XV, 1, 16132, Genova, Italy., Orengo AM; Nuclear Medicine, IRCCS Ospedale Policlinico San Martino, Largo Benzi 10, 16132, Genova, Italy., Cossu V; Nuclear Medicine, IRCCS Ospedale Policlinico San Martino, Largo Benzi 10, 16132, Genova, Italy., Ferrando S; Department of Earth, Environmental and Life Sciences, University of Genova, Corso Europa 26, Genova, Italy., Barbieri O; Animal Facility, IRCCS Ospedale Policlinico San Martino, Largo Benzi 10, 16132, Genova, Italy., Zocchi E; Department of Experimental Medicine, Section of Biochemistry, University of Genova, Viale Benedetto XV, 1, 16132, Genova, Italy. ezocchi@unige.it.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2020 Jan 29; Vol. 10 (1), pp. 1454. Date of Electronic Publication: 2020 Jan 29.
DOI: 10.1038/s41598-020-58206-0
Abstrakt: Abscisic acid (ABA) is a plant hormone active also in mammals where it regulates, at nanomolar concentrations, blood glucose homeostasis. Here we investigated the mechanism through which low-dose ABA controls glycemia and glucose fate. ABA stimulated uptake of the fluorescent glucose analog 2-NBDG by L6, and of [ 18 F]-deoxy-glucose (FDG) by mouse skeletal muscle, in the absence of insulin, and both effects were abrogated by the specific AMPK inhibitor dorsomorphin. In L6, incubation with ABA increased phosphorylation of AMPK and upregulated PGC-1α expression. LANCL2 silencing reduced all these ABA-induced effects. In vivo, low-dose oral ABA stimulated glucose uptake and storage in the skeletal muscle of rats undergoing an oral glucose load, as detected by micro-PET. Chronic treatment with ABA significantly improved the AUC of glycemia and muscle glycogen content in CD1 mice exposed to a high-glucose diet. Finally, both acute and chronic ABA treatment of hypoinsulinemic TRPM2 -/- mice ameliorated the glycemia profile and increased muscle glycogen storage. Altogether, these results suggest that low-dose oral ABA might be beneficial for pre-diabetic and diabetic subjects by increasing insulin-independent skeletal muscle glucose disposal through an AMPK-mediated mechanism.
Databáze: MEDLINE
Externí odkaz: