Abstract
Phenylketonuria (PKU) is the most frequent inborn error of metabolism. It is caused by deficiency in the activity of phenylalanine hydroxylase, leading to accumulation of phenylalanine and its metabolites. Untreated maternal PKU or hyperphenylalaninemia may result in nonphenylketonuric offspring with low birth weight and neonatal sequelae, especially microcephaly and intellectual disability. The mechanisms underlying the neuropathology of brain injury in maternal PKU syndrome are poorly understood. In the present study, we evaluated the possible preventive effect of the co-administration of creatine plus pyruvate on the effects elicited by phenylalanine administration to female Wistar rats during pregnancy and lactation on some enzymes involved in the phosphoryltransfer network in the brain cortex and hippocampus of the offspring at 21 days of age. Phenylalanine administration provoked diminution of body, brain cortex an hippocampus weight and decrease of adenylate kinase, mitochondrial and cytosolic creatine kinase activities. Co-administration of creatine plus pyruvate was effective in the prevention of those alterations provoked by phenylalanine, suggesting that altered energy metabolism may be important in the pathophysiology of maternal PKU. If these alterations also occur in maternal PKU, it is possible that pyruvate and creatine supplementation to the phenylalanine-restricted diet might be beneficial to phenylketonuric mothers.






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Acknowledgments
This work was supported by the research grants from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS) and FINEP Rede Instituto Brasileiro de Neurociência.
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Bortoluzzi, V.T., de Franceschi, I.D., Rieger, E. et al. Co-administration of Creatine Plus Pyruvate Prevents the Effects of Phenylalanine Administration to Female Rats During Pregnancy and Lactation on Enzymes Activity of Energy Metabolism in Cerebral Cortex and Hippocampus of the Offspring. Neurochem Res 39, 1594–1602 (2014). https://doi.org/10.1007/s11064-014-1353-8
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DOI: https://doi.org/10.1007/s11064-014-1353-8


