title: Mycophenolate mofetil prevents high-fat diet-induced hypertension and renal glomerular injury in Dahl SS rats.
abstract: We designed experiments to test the hypothesis that Dahl salt-sensitive (SS) rats are sensitive to high-fat diet (HFD)-induced hypertension and renal injury via an inflammatory mechanism. Twelve-week-old Dahl SS rats were maintained on a normal diet (ND; 14% fat), HFD (59% fat), or HFD supplemented with the lymphocyte immunosuppressive agent, mycophenolate mofetil (HFD + MMF; 30 mg/kg/day orally in diet), for a period of 4 weeks. Mean arterial pressure (MAP), metabolic parameters, T lymphocyte (CD3(+)) localization, and renal structural damage were assessed during the studies. Four weeks of HFD significantly elevated MAP and visceral adiposity without changing circulating levels of lipids or adipokines. Immunohistochemical analysis demonstrated that SS rats on HFD had significantly greater numbers of CD3(+) cells in renal glomerular and medullary areas compared to ND SS rats. Additionally, HFD led to increased glomerular injury, but did not alter renal medullary injury. Chronic MMF treatment in HFD-fed Dahl SS rats reduced MAP, visceral adiposity, infiltration of CD3(+) cells in the glomerulus, as well as glomerular injury. However, MMF treatment did not alter HFD-induced infiltration of CD3(+) cells in the renal medulla. In conclusion, Dahl SS rats are sensitized to HFD-induced hypertension and renal glomerular injury via infiltration of T lymphocytes.
authors.affiliation: Section of Experimental Medicine, Department of Medicine, Medical College of Georgia, Georgia Regents University Augusta, 30912, Georgia.
authors.forename: Frank T
authors.initials: FT
authors.lastname: Spradley
authors.affiliation: Section of Experimental Medicine, Department of Medicine, Medical College of Georgia, Georgia Regents University Augusta, 30912, Georgia.
authors.forename: Carmen
authors.initials: C
authors.lastname: De Miguel
authors.affiliation: Section of Experimental Medicine, Department of Medicine, Medical College of Georgia, Georgia Regents University Augusta, 30912, Georgia.
authors.forename: Janet
authors.initials: J
authors.lastname: Hobbs
authors.affiliation: Section of Experimental Medicine, Department of Medicine, Medical College of Georgia, Georgia Regents University Augusta, 30912, Georgia.
authors.forename: David M
authors.initials: DM
authors.lastname: Pollock
authors.affiliation: Section of Experimental Medicine, Department of Medicine, Medical College of Georgia, Georgia Regents University Augusta, 30912, Georgia.
authors.forename: Jennifer S
authors.initials: JS
authors.lastname: Pollock
keywords: Dahl salt-sensitive rat; SS-13BN rat; T lymphocytes; glomerulus; high-fat diet; hypertension