title: Generation and characterization of a novel kidney-specific manganese superoxide dismutase knockout mouse.
abstract: Inactivation of manganese superoxide dismutase (MnSOD), a mitochondrial antioxidant, has been associated with renal disorders and often results in detrimental downstream events that are mechanistically not clear. Development of an animal model that exhibits kidney-specific deficiency of MnSOD would be extremely beneficial in exploring the downstream events that occur following MnSOD inactivation. Using Cre-Lox recombination technology, kidney-specific MnSOD deficient mice (both 100% and 50%) were generated that exhibited low expression of MnSOD in discrete renal cell types and reduced enzymatic activity within the kidney. These kidney-specific 100% KO mice possessed a normal life-span, although it was interesting that the mice were smaller. Consistent with the important role in scavenging superoxide radicals, the kidney-specific KO mice showed a significant increase in oxidative stress (tyrosine nitration) in a gene-dose dependent manner. In addition, loss of MnSOD resulted in mild renal damage (tubular dilation and cell swelling). Hence, this novel mouse model will aid in determining the specific role (local and/or systemic) governed by MnSOD within certain kidney cells. Moreover, these mice will serve as a powerful tool to explore molecular mechanisms that occur downstream of MnSOD inactivation in renal disorders or possibly in other pathologies that rely on normal renal function.
authors.affiliation: Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
authors.forename: Nirmala
authors.initials: N
authors.lastname: Parajuli
authors.forename: Akira
authors.initials: A
authors.lastname: Marine
authors.forename: Sloane
authors.initials: S
authors.lastname: Simmons
authors.forename: Hamida
authors.initials: H
authors.lastname: Saba
authors.forename: Tanecia
authors.initials: T
authors.lastname: Mitchell
authors.forename: Takahiko
authors.initials: T
authors.lastname: Shimizu
authors.forename: Takuji
authors.initials: T
authors.lastname: Shirasawa
authors.forename: Lee Ann
authors.initials: LA
authors.lastname: Macmillan-Crow
mesh_terms: D000818:Animals; D001483:Base Sequence; D001786:Blood Glucose / Q000032:analysis; D003404:Creatinine / Q000097:blood; D017931:DNA Primers; D005260:Female; D007150:Immunohistochemistry; D007668:Kidney / Q000201:enzymology*; D051379:Mice; D008822:Mice, Transgenic; D013482:Superoxide Dismutase / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*
chemical_list: D001786:Blood Glucose; D017931:DNA Primers; D003404:Creatinine; D013482:Superoxide Dismutase