title: Pyrroloquinoline quinone ameliorates oxidative stress and lipid peroxidation in the brain of streptozotocin-induced diabetic mice.
abstract: Diabetes, characterized by hyperglycemia, leads to several complications through the generation of reactive oxygen species and initiates tissue damage. Pyrroloquinoline quinone (PQQ) is believed to be a strong antioxidant, as it protects cells from oxidative damage. In this study, we elucidated the hitherto unknown potential of PQQ to ameliorate the brain damage caused by diabetes mellitus and the associated hyperglycemia-induced oxidative damage. Administration of a single dose of streptozotocin (STZ), i.e., 150 mg·(kg body mass)(-1) significantly enhanced the brain tissue levels of lipid peroxidation and hydroperoxidation and decreased the levels of antioxidants. It also increased the serum levels of glucose, cholesterol, and triglycerides. However, when STZ-treated animals received PQQ (20 mg·(kg body mass)(-1)·d(-1), for 15 days), this significantly decreased the serum levels of glucose and lipid peroxidation products, and increased the activities of antioxidants in the diabetic mouse brain. These findings suggest that PQQ has the potential to ameliorate STZ-induced oxidative damage in the brain, as well as the STZ-induced diabetes.
authors.affiliation: School of Life Sciences, Devi Ahilya University, Takshashila Campus, Khandwa Road, Indore, Madhya Pradesh, India.
authors.forename: Narendra
authors.initials: N
authors.lastname: Kumar
authors.forename: Anand
authors.initials: A
authors.lastname: Kar
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects* / Q000378:metabolism; D003921:Diabetes Mellitus, Experimental / Q000139:chemically induced / Q000188:drug therapy* / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects* / Q000502:physiology; D008297:Male; D051379:Mice; D018384:Oxidative Stress / Q000187:drug effects* / Q000502:physiology; D045542:PQQ Cofactor / Q000494:pharmacology / Q000627:therapeutic use*; D013311:Streptozocin / Q000633:toxicity*
chemical_list: D013311:Streptozocin; D045542:PQQ Cofactor
keywords: PQQ; TBA-RS; antioxidants; antioxydants; diabetes mellitus; diabète sucré