title: Regulatory cross-talk of mouse liver polyamine and methionine metabolic pathways: a systemic approach to its physiopathological consequences.
abstract: Both polyamines and methionine derivatives are nitrogen compounds directly related to the regulation of gene expression. In silico predictions and experimental evidence suggest a cross-talk between polyamine and methionine metabolism in mammalian tissues. Since liver is the major organ that controls nitrogen metabolism of the whole organism, it is the best tissue to further test this hypothesis in vivo. In this work, we studied the effects of the chronic administration of a methionine-supplemented diet (0.5% Met in drinking water for 5 months) on the liver of mice (designated as MET-mice). Metabolic and proteomic approaches were performed and the data obtained were subjected to biocomputational analysis. Results showed that a supplemental methionine intake can indeed regulate biogenic amine metabolism in an in vivo model by multiple mechanisms including metabolic regulation and specific gene demethylation. Furthermore, putative systemic effects were investigated by molecular and cellular biology methods. Among other results, altered expression levels of multiple inflammation and cell proliferation/death balance markers were found and macrophage activation was observed. Overall, the results presented here will be of interest across a variety of biomedical disciplines, including nutrition, orphan diseases, immunology and oncology.
authors.affiliation: Departamento de Biología Molecular y Bioquímica, Universidad de Málaga, Málaga, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Correa-Fiz
authors.forename: A
authors.initials: A
authors.lastname: Reyes-Palomares
authors.forename: I
authors.initials: I
authors.lastname: Fajardo
authors.forename: E
authors.initials: E
authors.lastname: Melgarejo
authors.forename: A
authors.initials: A
authors.lastname: Gutiérrez
authors.forename: J A
authors.initials: JA
authors.lastname: García-Ranea
authors.forename: M A
authors.initials: MA
authors.lastname: Medina
authors.forename: F
authors.initials: F
authors.lastname: Sánchez-Jiménez
mesh_terms: D000818:Animals; D001483:Base Sequence; D015317:Biogenic Polyamines / Q000378:metabolism*; D019175:DNA Methylation; D017931:DNA Primers; D005260:Female; D007150:Immunohistochemistry; D008099:Liver / Q000378:metabolism*; D008715:Methionine / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D016133:Polymerase Chain Reaction; D020543:Proteome; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D015317:Biogenic Polyamines; D017931:DNA Primers; D020543:Proteome; D008715:Methionine