NDLI: Nuclear factor erythroid 2-like 2 (Nrf2) expression in end-stage liver disease.

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Nuclear factor erythroid 2-like 2 (Nrf2) expression in end-stage liver disease.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kurzawski, Mateusz Dziedziejko, Violetta Urasinska, Elzbieta Post, Mariola Wójcicki, Maciej Mietkiewski, Janusz Drozdzik, Marek
Description	Country affiliation: Poland Author Affiliation: Kurzawski M ( Department of Experimental and Clinical Pharmacology, Pomeranian Medical University, Szczecin, Poland. labfarm@pum.edu.pl)
Abstract	The transcription factor Nrf2, encoded by NFE2L2 gene is a key regulator of cellular defense against oxidative and electrophilic stress, also governing the expression of many phase II detoxification enzymes. Nrf2 is negatively regulated by KEAP1 protein. Recent studies have shown that Nrf2 might also constitute an important mediator of inflammatory processes. In the current study the expression of Nrf2 in livers from patients with end-stage liver disease has been investigated. Surgical specimens were obtained from explanted livers of 24 patients with end-stage liver disease of different etiology. Control samples were obtained from nontumoral liver tissue from 6 patients with metastatic liver tumors. Nrf2 expression was evaluated by means of qRT-PCR, Western-blot and immunohistochemical staining. KEAP1 gene expression was investigated at mRNA level. The expression of the NFE2L2 gene was decreased in all groups of end-stage liver disease samples as compared with the controls (mean 0.470±1.20 of the value observed in the control samples, p=0.003). Decreased values of NFE2L2/KEAP1 mRNA ratio were also observed in end-stage liver disease groups (0.60±0.24 of the value observed in the control samples, p=0.019). The results were generally confirmed in Western-blot and immunohistochemical analysis of Nrf2 protein. Different expression pattern of Nrf2 regulated genes in end-stage liver disease samples were observed: glutamate-cysteine ligase (GCLC) and glutathione-S-transferase A1 (GSTA1) were significantly down-regulated in most liver disease groups, whereas heme oxidase 1 (HMOX1) and NAD(P)H dehydrogenase [quinone] 1 (NQO1) were not significantly suppressed. Treatment of HepG2 cells with pro-inflammatory cytokines resulted in significant decrease of GSTA1, NFE2L2 and GCLC expression, while the exposure had no significant influence on KEAP1, HMOX1, and NQO1 mRNA levels. Nrf2 deficiency may be one of the factors underlying impaired liver function in detoxification processes. It remains to be established in further studies if the observed decrease of Nrf2 expression is just a result of liver cirrhosis or is primary, playing a role in disease pathogenesis.
File Format	HTM / HTML
ISSN	13826689
Issue Number	1
Volume Number	34
e-ISSN	18727077
Journal	Environmental Toxicology and Pharmacology
Language	English
Publisher	Elsevier
Publisher Date	2012-07-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Discipline Pharmacology Liver Diseases Metabolism Nf-e2-related Factor 2 Adult Cytokines Pharmacology Female Glutamate-cysteine Ligase Genetics Glutathione Transferase Heme Oxygenase-1 Hep G2 Cells Humans Intracellular Signaling Peptides And Proteins Male Middle Aged Rna, Messenger Journal Article
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Medicine Toxicology Pharmacology

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