The relation between sphingomyelinase activity, lipid peroxide oxidation and NO-releasing in mice liver and brain.
We used animal models to study connection between oxidating system and sphingomyelin signaling cascade, because this models are more close related to people disease. Activation of n-sphingomyelinase (n-SMase) in mice liver and brain is coincided in time with increased level of peroxide products (conjugated dienes) after injection of tumor necrosis factor alpha (TNF-alpha). We found that ceramide can induce peroxide oxidation and lead to accumulation of TNF-alpha in animal organs. Nitric oxide (NO) donors (S-nitrosoglutathione and dinitrosyl iron complex) reversibly inhibited activity of n-SMase and decreased level of lipid peroxidation products. This data proposed that both SMase and messengers of oxidative systems could be targets for NO-derived oxidants.
Alessenko
A V
AV
Institute of Biochemical Physics of the Russian Academy of Sciences, Moscow. ales@sky.chph.ras.ru
Shupik
M A
MA
Bugrova
A E
AE
Dudnik
L B
LB
Shingarova
L N
LN
Mikoyan
A
A
Vanin
A F
AF
D000818:Animals; D001921:Brain / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D002518:Ceramides / Q000494:pharmacology; D007501:Iron / Q000494:pharmacology; D015227:Lipid Peroxidation / Q000187:drug effects; D008099:Liver / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009569:Nitric Oxide / Q000378:metabolism*; D009589:Nitrogen Oxides / Q000494:pharmacology; D026422:S-Nitrosoglutathione / Q000494:pharmacology; D013108:Sphingomyelin Phosphodiesterase / Q000037:antagonists & inhibitors / Q000378:metabolism*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism / Q000494:pharmacology
D002518:Ceramides; D009589:Nitrogen Oxides; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide; D026422:S-Nitrosoglutathione; C073661:dinitrosyl iron complex; D007501:Iron; D013108:Sphingomyelin Phosphodiesterase