title: Multivitamin restriction increases adiposity and disrupts glucose homeostasis in mice.
abstract: A strong association between obesity and low plasma concentrations of vitamins has been widely reported; however, the causality of this relationship is still not established. Our goal was to evaluate the impact of a multivitamin restriction diet (MRD) on body weight, adiposity and glucose homeostasis in mice. The mice were given a standard diet or a diet containing 50 % of the recommended vitamin intake (MRD) for 12 weeks. At the end of the experiment, total body weight was 6 % higher in MRD animals than in the control group, and the adiposity of the MRD animals more than doubled. The HOMA-IR index of the MRD animals was significantly increased. The adipose tissue of MRD animals had lower expression of mRNA encoding adiponectin and Pnpla2 (47 and 32 %, respectively) and 43 % higher leptin mRNA levels. In the liver, the mRNA levels of Pparα and Pgc1α were reduced (29 and 69 %, respectively) in MRD mice. Finally, the level of β-hydroxybutyrate, a ketonic body reflecting fatty acid oxidation, was decreased by 45 % in MRD mice. Our results suggest that MRD promotes adiposity, possibly by decreasing adipose tissue lipolysis and hepatic β-oxidation. These results could highlight a possible role of vitamin deficiency in the etiology of obesity and associated disorders.
authors.affiliation: INRA, UMR 1260, 13385, Marseille, France.
authors.forename: Nisserine Ben
authors.initials: NB
authors.lastname: Amara
authors.forename: Julie
authors.initials: J
authors.lastname: Marcotorchino
authors.forename: Franck
authors.initials: F
authors.lastname: Tourniaire
authors.forename: Julien
authors.initials: J
authors.lastname: Astier
authors.forename: Marie-Josèphe
authors.initials: MJ
authors.lastname: Amiot
authors.forename: Patrice
authors.initials: P
authors.lastname: Darmon
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Landrier