Autor según el artículo: Marsillach J; Aragonès G; Mackness B; Mackness M; Rull A; Beltrán-Debón R; Pedro-Botet J; Alonso-Villaverde C; Joven J; Camps J
Departamento: Medicina i Cirurgia
Autor/es de la URV: Alonso-Villaverde Lozano, Carlos José / ARAGONÈS BARGALLÓ, GEMMA / Aragonès Bargalló, Gerard / Beltrán Debón, Raúl Alejandro / Camps Andreu, Jorge / Joven Maried, Jorge / MARSILLACH LÓPEZ, JUDIT / RULL AIXA, ANNA
Resumen: © 2010 Marsillach et al; licensee BioMed Central Ltd. Background: Paraoxonase-1 (PON1), a lactonase synthesized by the liver, circulates in blood bound to high-density lipoproteins (HDL). This enzyme is thought to degrade oxidized phospholipids and play an important role in the organism's antioxidant and anti-inflammatory system. Chronic liver diseases are characterized by decreased serum PON1 activity. The aim of the present study was to investigate the compositional changes in HDL that could influence PON1 activity in liver impairment. Methods: The study was performed in samples from five patients with advanced liver cirrhosis and with preserved renal function, chosen on the basis of having low serum PON1 activity and high serum PON1 concentration. As a control group, we accessed five healthy volunteers from among our hospital staff. Lipid and protein compositional analysis of lipoprotein particles were done by high-performance liquid chromatography, gel electrophoresis, and Western-Blot. Results: HDL particles from cirrhotic patients had an increased phospholipid content that was inversely correlated to PON1 activity. The HDL particles contained high levels of PON1 that corresponded, in part, to an immunoreactive protein of high molecular weight (55 kDa) not present in control subjects. This protein was identified as glycosylated PON1 and was also present in biopsies from patients with steatosis and from rats with CCl4-induced hepatic impairment. These changes were associated with an increased plasma concentration of markers of oxidative stress, inflammation and fibrogenesis. Conclusion: Abnormalities in the composition of lipids and proteins of HDL particles, including PON1 glycosylation, are associated with the decrease in serum PON1 activity in patients with liver disease. These alterations may adversely affect the protective role of HDL against oxidative stress and inflammation in these patients.
Áreas temáticas: Saúde coletiva Química Odontología Nutrition & dietetics Nutrição Medicina veterinaria Medicina iii Medicina ii Medicina i Interdisciplinar Farmacia Ensino Enfermagem Endocrinology, diabetes and metabolism Endocrinology Educação física Clinical biochemistry Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciência de alimentos Biotecnología Biodiversidade Biochemistry (medical) Biochemistry & molecular biology
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1476-511X
Direcció de correo del autor: jorge.camps@urv.cat carlosjose.alonsovillaverde@urv.cat jorge.joven@urv.cat gerard.aragones@urv.cat raul.beltran@urv.cat
Identificador del autor: 0000-0002-3165-3640 0000-0003-2749-4541 0000-0001-9691-1906
Fecha de alta del registro: 2024-09-07
Volumen de revista: 9
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://lipidworld.biomedcentral.com/articles/10.1186/1476-511X-9-46
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Lipids In Health And Disease. 9 (1): 46-
Referencia de l'ítem segons les normes APA: Marsillach J; Aragonès G; Mackness B; Mackness M; Rull A; Beltrán-Debón R; Pedro-Botet J; Alonso-Villaverde C; Joven J; Camps J (2010). Decreased paraoxonase-1 activity is associated with alterations of high-density lipoprotein particles in chronic liver impairment. Lipids In Health And Disease, 9(1), 46-. DOI: 10.1186/1476-511X-9-46
DOI del artículo: 10.1186/1476-511X-9-46
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2010
Tipo de publicación: Journal Publications
Repositori URV