Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/8309
Title: Mitochondria as the target for mildronate's protective effects in azidothymidine (AZT)-induced toxicity of isolated rat liver mitochondria
Authors: Pupure, Jolanta 
Fernandes, Maria A. S. 
Santos, Maria S. 
Moreno, António J. M. 
Kalvinsh, Ivars 
Klusa, Vija 
Oliveira, Catarina R. 
Issue Date: 2008
Citation: Cell Biochemistry and Function. 26:5 (2008) 620-631
Abstract: Previously mildronate, an aza-butyrobetaine derivative, was shown to be a cytoprotective drug, through its mechanism of action of inhibition of carnitine palmitoyltransferase-1, thus protecting mitochondria from long-chain fatty acid accumulation and subsequent damage. Recently in an azidothymidine (AZT)-induced cardiotoxicity model in vivo (in mice), we have found mildronate's ability of protecting heart tissue from nuclear factor kappaB abnormal expression. Preliminary data also demonstrate cerebro- and hepatoprotecting properties of mildronate in AZT-toxicity models. We suggest that mildronate may target its action predominantly to mitochondria. The present study in isolated rat liver mitochondria was designed to clarify mitochondrial targets for mildronate by using AZT as a model compound. The aim of this study was to investigate: (1) whether mildronate may protect mitochondria from AZT-induced toxicity; and (2) which is the most critical target in mitochondrial processes that is responsible for mildronate's regulatory action. The results showed that mildronate protected mitochondria from AZT-induced damage predominantly at the level of complex I, mainly by reducing hydrogen peroxide generation. Significant protection of AZT-caused inhibition of uncoupled respiration, ADP to oxygen ratio, and transmembrane potential were also observed. Mildronate per se had no effect on the bioenergetics, oxidative stress, or permeability transition of rat liver mitochondria. Since mitochondrial complex I is the first enzyme of the respiratory electron transport chain and its damage is considered to be responsible for different mitochondrial diseases, we may account for mildronate's effectiveness in the prevention of pathologies associated with mitochondrial dysfunctions. Copyright © 2008 John Wiley & Sons, Ltd.
URI: http://hdl.handle.net/10316/8309
DOI: 10.1002/cbf.1486
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
obra.pdf255.01 kBAdobe PDFView/Open
Show full item record

SCOPUSTM   
Citations

23
checked on Nov 8, 2019

WEB OF SCIENCETM
Citations

18
checked on Nov 7, 2019

Page view(s)

101
checked on Nov 12, 2019

Download(s) 20

505
checked on Nov 12, 2019

Google ScholarTM

Check

Altmetric

Dimensions


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.