The activities of antioxidant enzymes and monoamine oxidase and uncoupling protein 1 content in brown fat of hypo- and hyperthyroid rats.
We have studied the activities of antioxidant enzymes (AOE), namely, copper-zinc superoxide dismutase (CuZnSOD), manganese superoxide dismutase (MnSOD), and catalase (CAT), and the activity of catecholamine-degrading enzyme monoamine oxidase (MAO) and uncoupling protein 1 (UCP1) content in brown fat (BF) of hypo- and hyperthyroid rats. We found that hypothyroidism decreased BF UCP1 content and increased MAO, MnSOD, and CAT activities. T3 increased UCP1 content and MnSOD activity and decreased CuZnSOD, MAO, and CAT activities, while T4 significantly altered (decreased) only CAT activity. This study shows that UCP1 content and MAO and AOE activities in rat BF are notably affected by changed thyroid status.
Petrovic
N
N
Institute of Physiology and Biochemistry, Faculty of Biology, University of Belgrade, Serbia and Montenegro.natasa.petrovic@zoofys.su.se
Cvijic
G
G
Djordjevic
J
J
Davidovic
V
V
D002001:Adipose Tissue, Brown / Q000201:enzymology* / Q000378:metabolism; D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D002352:Carrier Proteins / Q000378:metabolism*; D006980:Hyperthyroidism / Q000201:enzymology* / Q000378:metabolism; D007037:Hypothyroidism / Q000201:enzymology* / Q000378:metabolism; D007473:Ion Channels; D008297:Male; D008565:Membrane Proteins / Q000378:metabolism*; D024101:Mitochondrial Proteins; D008995:Monoamine Oxidase / Q000378:metabolism*; D010088:Oxidoreductases / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D000071256:Uncoupling Protein 1
D000975:Antioxidants; D002352:Carrier Proteins; D007473:Ion Channels; D008565:Membrane Proteins; D024101:Mitochondrial Proteins; C000604373:Ucp1 protein, rat; D000071256:Uncoupling Protein 1; D010088:Oxidoreductases; D008995:Monoamine Oxidase