The formation of argpyrimidine, a methylglyoxal-arginine adduct, in the nucleus of neural cells.
Biochem Biophys Res Commun
; 378(2): 209-12, 2009 Jan 09.
Article
en En
| MEDLINE
| ID: mdl-19014907
Methylglyoxal (MG) is an endogenous metabolite in glycolysis and forms stable adducts primarily with arginine residues of intracellular proteins. The biological role of this modification in cell function is not known. In the present study, we found that a MG-detoxification enzyme glyoxalase I (GLO1) is mainly expressed in the ventricular zone (VZ) at embryonic day 16 which neural stem and progenitor cells localize. Moreover, immunohistochemical analysis revealed that argpyrimidine, a major MG-arginine adduct, is predominantly produced in cortical plate neurons not VZ during cerebral cortex development and is exclusively located in the nucleus. Immunoblotting experiment showed that the formation of argpyrimidine occurs on some nuclear proteins of cortical neurons. To our knowledge, this is first report of the argpyrimidine formation in the nucleus of neuron. These findings suggest that GLO1, which is dominantly expressed in the embryonic VZ, reduces the intracellular level of MG and suppresses the formation of argpyrimidine in neural stem and progenitor cells. Argpyrimidine may contribute to the neural differentiation and/or the maintenance of the differentiated state via the modification of nuclear proteins.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ornitina
/
Arginina
/
Pirimidinas
/
Piruvaldehído
/
Aductos de ADN
/
Lactoilglutatión Liasa
/
Neuronas
Límite:
Animals
Idioma:
En
Revista:
Biochem Biophys Res Commun
Año:
2009
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Estados Unidos