Evidence that plasmalogen is protective against oxidative stress in the rat brain.
The antioxidant capabilities of phosphatidylethanolamine plasmalogen (PlsEtn), in vivo, against lipid peroxidation were investigated via acute phosphine (PH(3)) administration in rats. Oxidative stress was assessed from measures of malondialdehyde and various enzyme activities, while NMR analyses of lipid and aqueous tissue extracts provided metabolic information in cerebellum, brainstem, and cortex. Brainstem had the highest basal [PlsEtn], and showed only moderate PH(3)-induced oxidative damage with no loss of ATP. The lowest basal [PlsEtn] was observed in cortex, where PH(3) caused a 51% decrease in [ATP]. The largest oxidative effect occurred in cerebellum, but [ATP] was unaffected. Myo-inositol+ethanolamine pretreatment attenuated all PH(3) effects. Specifically, the pretreatment attenuated the ATP decrease in cortex, and elevated brain [PlsEtn] in the cerebellum, nearly abolishing the cerebellar oxidative effects. Our data suggest a high basal [PlsEtn], or the capacity to synthesize new ethanolamine lipids (particularly PlsEtn) may protect against PH(3) toxicity.
Kuczynski
Beth
B
Department of Biochemistry and Molecular Biology, Wright State University School of Medicine, WSU Magnetic Resonance Laboratory, Cox Institute, Dayton, OH 45429, USA.
Reo
Nicholas V
NV
D000447:Aldehydes / Q000737:chemistry; D000818:Animals; D000975:Antioxidants / Q000737:chemistry / Q000378:metabolism*; D001921:Brain / Q000033:anatomy & histology / Q000378:metabolism*; D001923:Brain Chemistry; D002374:Catalase / Q000378:metabolism; D004983:Ethanolamines / Q000737:chemistry / Q000378:metabolism; D005227:Fatty Acids / Q000378:metabolism; D005980:Glutathione Reductase / Q000378:metabolism; D007294:Inositol / Q000737:chemistry / Q000378:metabolism; D007306:Insecticides / Q000008:administration & dosage; D018696:Neuroprotective Agents / Q000737:chemistry / Q000378:metabolism*; D019906:Nuclear Magnetic Resonance, Biomolecular; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D010720:Phosphines / Q000008:administration & dosage; D010743:Phospholipids / Q000378:metabolism; D010955:Plasmalogens / Q000737:chemistry / Q000378:metabolism*; D051381:Rats
D000447:Aldehydes; D000975:Antioxidants; D004983:Ethanolamines; D005227:Fatty Acids; D007306:Insecticides; D018696:Neuroprotective Agents; D010720:Phosphines; D010743:Phospholipids; D010955:Plasmalogens; D007294:Inositol; D002374:Catalase; D005980:Glutathione Reductase; C044646:phosphine