Document Detail


Colloidal carbon stimulation of Kupffer cells triggers Nrf2 activation in the isolated perfused rat liver.
MedLine Citation:
PMID:  22461194     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Activation of transcription factor Nrf2 was investigated in the isolated perfused rat liver infused with 0.5 mg of colloidal carbon (CC)/ml for 5-15 min to stimulated Kupffer cell function. Infusion of CC enhanced liver O(2) consumption over basal levels, with a time-dependent increase in CC-induced O(2) uptake, at constant rates of CC phagocytosis by Kupffer cells, as assessed histologically, and adequate viability conditions of the livers, as shown by the marginal (0.34 %) total sinusoidal lactate dehydrogenase (LDH) efflux over intrahepatic LDH activity. Under these conditions, cytosolic protein levels of Nrf2 (Western blot) and inhibitor of Nrf2 Keap1 progressively declined by CC infusion, those of nuclear Nrf2 increased, leading to enhancement in the nuclear/cytosolic Nrf2 ratios. It is concluded that the respiratory burst of CC-stimulated Kupffer cells triggers Nrf2 activation in the perfused liver, a response that may afford cellular protection under pro-oxidant conditions underlying Kupffer cell stimulation.
Authors:
Bárbara Núñez; Romina Vargas; Iván Castillo; Luis A Videla
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-30
Journal Detail:
Title:  Journal of molecular histology     Volume:  -     ISSN:  1567-2387     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101193653     Medline TA:  J Mol Histol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
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