title: Long-term moderate magnesium-deficient diet shows relationships between blood pressure, inflammation and oxidant stress defense in aging rats.
abstract: Epidemiological and experimental studies have indicated a relationship among aging, dietary Mg, inflammatory stress, and cardiovascular disease. Our aim in the present study was to investigate possible links between dietary Mg, oxidant stress parameters, and inflammatory status with aging in rats. We designed a long-term study in which rats were fed for 22 months with moderately deficient (150 mg/kg), standard (800 mg/kg), or supplemented (3200 mg/kg) Mg diets. Comparisons were made with young rats fed with the same diets for 1 month. Compared to the standard and supplemented diets, the Mg-deficient diet significantly increased blood pressure, plasma interleukin-6, fibrinogen, and erythrocyte lysophosphatidylcholine, particularly in aging rats, it decreased plasma albumin. The impairment of redox status was indicated by increases in plasma thiobarbituric acid reactive substances and oxysterols and an increased blood susceptibility to in vitro free-radical-induced hemolysis. We concluded that Mg deficiency induced a chronic impairment of redox status associated with inflammation which could significantly contribute to increased oxidized lipids and promote hypertension and vascular disorders with aging. Extrapolating to the human situation and given that Mg deficiency has been reported to be surprisingly common, particularly in the elderly, Mg supplementation might be useful as an adjuvant therapy in preventing cardiovascular disease.
authors.affiliation: INSERM U 498, Biochimie des Lipoprotéines, Dijon, F-21079, France. dblache@u-bourgogne.fr
authors.forename: Denis
authors.initials: D
authors.lastname: Blache
authors.forename: Sylvie
authors.initials: S
authors.lastname: Devaux
authors.forename: Olivier
authors.initials: O
authors.lastname: Joubert
authors.forename: Nadine
authors.initials: N
authors.lastname: Loreau
authors.forename: Martina
authors.initials: M
authors.lastname: Schneider
authors.forename: Philippe
authors.initials: P
authors.lastname: Durand
authors.forename: Michel
authors.initials: M
authors.lastname: Prost
authors.forename: Vincent
authors.initials: V
authors.lastname: Gaume
authors.forename: Markus
authors.initials: M
authors.lastname: Adrian
authors.forename: Pascal
authors.initials: P
authors.lastname: Laurant
authors.forename: Alain
authors.initials: A
authors.lastname: Berthelot
mesh_terms: D000818:Animals; D001794:Blood Pressure; D007249:Inflammation / Q000503:physiopathology*; D008275:Magnesium Deficiency / Q000503:physiopathology*; D008297:Male; D018384:Oxidative Stress; D051381:Rats; D017207:Rats, Sprague-Dawley