The effect of sugars and free amino acids from the freshwater prawn Macrobrachium rosenbergii hemolymph on lectin activity and on oxidative burst
Por:
Soria F., Sierra C., Bouquelet S., Brassart C., Agundis C., Zenteno E., Vázquez L.
Publicada:
1 ene 2006
Resumen:
We determined the effect of low molecular weight components (LMWC) from healthy juvenile and adult Macrobrachium rosenbergii hemolymph on lectin activity and oxidative burst (OB) in hemocytes. In an attempt to identify the LMWC that affect the lectin's hemagglutinating activity or oxidative burst, we determined the hemolymph carbohydrates and free amino acids (FAA) concentration. The LMWC (< 2000 Da) were obtained after dialysis of the hemolymph. Our results showed that LMWC from juveniles exerted a greater inhibition on lectin than LMWC from adult hemolymph. Production of superoxide radicals by hemocytes was lower in the presence of juvenile (p < 0.05) as compared to adult LMWC. FAA composition of the hemolymph and of LMWC from adults showed higher proportion of alanine (which corresponded to 25% of total FAA) and proline (> 20%); whereas, in juveniles, the main FAA identified were glycine (> 40%) and alanine (26%). N-Acetyl-d-glucosamine (GlcNAc) was the main sugar residue in the hemolymph and LMWC from juveniles; its concentration was 2.4 times higher than glucose (Glc), whereas, in adults, Glc was the main free sugar residue. Our results suggest that the proportion of FAA and carbohydrates in the hemolymph of M. rosenbergii seems to be correlated with the maturation process; furthermore, the high proportion of free GlcNAc and glycine regulate, in the juvenile stage, lectin activity and cellular oxidative mechanisms, respectively. © 2005 Elsevier Inc. All rights reserved.
Filiaciones:
Soria F.:
Laboratorio de Lectinas, CIQ, Universidad Autónoma del Estado de Morelos, Cuernavaca Morelos 62210, Mexico
Sierra C.:
Departamento de Bioquímica, Instituto Nacional de Enfermedades Respiratorias, Calzada de Tlalpan 4502, 01040, Mexico, Mexico
Bouquelet S.:
Laboratoire de Chimie Biologique de la Université des Sciences et Technologies de Lille, UMR du CNRS no. 8576, Villeneuve d'Ascq 59655, France
Brassart C.:
Laboratoire de Chimie Biologique de la Université des Sciences et Technologies de Lille, UMR du CNRS no. 8576, Villeneuve d'Ascq 59655, France
Agundis C.:
Laboratorio de Inmunología, Departamento de Bioquímica, UNAM, 04510, Mexico, Mexico
Zenteno E.:
Laboratorio de Inmunología, Departamento de Bioquímica, UNAM, 04510, Mexico, Mexico
Vázquez L.:
Laboratorio de Lectinas, CIQ, Universidad Autónoma del Estado de Morelos, Cuernavaca Morelos 62210, Mexico
Laboratorio de Lectinas, Centro de Investigaciones Químicas, Universidad Autonoma del Estado de Morelos, Avenida Universidad 1001, Cuernavaca Morelos 62210, Mexico
|