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Oxidative stress-related parameters in the liver of non-alcoholic fatty liver disease patients

Authordc.contributor.authorVidela Cabrera, Luis 
Authordc.contributor.authorRodrigo Salinas, Ramón es_CL
Authordc.contributor.authorOrellana Bown, Myriam es_CL
Authordc.contributor.authorFernandez, Virginia es_CL
Authordc.contributor.authorTapia Opazo, Gladys es_CL
Authordc.contributor.authorQuiñones Sepúlveda, Luis es_CL
Authordc.contributor.authorVarela Figueroa, Nelson es_CL
Authordc.contributor.authorContreras, Jorge es_CL
Authordc.contributor.authorLazarte, Raúl es_CL
Authordc.contributor.authorCsendes Juhasz, Attila es_CL
Authordc.contributor.authorRojas Caro, Jorge es_CL
Authordc.contributor.authorMaluenda, Fernando es_CL
Authordc.contributor.authorBurdiles Pinto, Patricio es_CL
Authordc.contributor.authorDíaz Jeraldo, Juan es_CL
Authordc.contributor.authorSmok Sahid, Gladys es_CL
Authordc.contributor.authorThielemann, Lilian es_CL
Authordc.contributor.authorPoniachik Teller, Jaime 
Cita de ítemdc.identifier.citationClinical Science (2004) 106, 261–268 (Printed in Great Britain)
Abstractdc.description.abstractOxidative stress is implicated in the pathogenesis of non-alcoholic fatty liver disease (NAFLD). In the present study, hepatic and plasma oxidative stress-related parameters were measured and correlated with clinical and histological findings in 31 NAFLD patients showing increased bodymass index. Liver protein carbonyl content was enhanced by 403% in patients with steatosis (n=15) compared with control values (n=12), whereas glutathione content, superoxide dismutase (SOD) activity and the ferric reducing ability of plasma (FRAP) were decreased by 57 %, 48% and 21% (P<0.05) respectively. No changes in microsomal p-nitrophenol hydroxylation and the total content of cytochrome P450 (CYP) or CYP2E1 were observed. Patients with steatohepatitis (n=16) exhibited protein carbonyl content comparable with that of controls, whereas glutathione content, SOD and catalase activities were decreased by 27%, 64% and 48% (P<0.05). In addition, FRAP values in patients with steatohepatitis were reduced by 33% and 15% (P<0.05) when compared with controls and patients with steatosis respectively, whereas p-nitrophenol hydroxylation (52 %) and CYP2E1 content (142 %) were significantly increased (P<0.05) compared with controls. It is concluded that oxidative stress is developed in the liver of NAFLD patients with steatosis and is exacerbated further in patients with steatohepatitis, which is associated with CYP2E1 induction. Substantial protein oxidation is followed by proteolysis of the modified proteins, which may explain the co-existence of a diminished antioxidant capacity and protein oxidation in the liver of patients with steatohepatitis.en_US
Publisherdc.publisherClinical Scienceen_US
Keywordsdc.subjectoxidative stress
Títulodc.titleOxidative stress-related parameters in the liver of non-alcoholic fatty liver disease patientsen_US
Document typedc.typeArtículo de revistaen_US

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