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An active mitochondrial biogenesis occurs during dendritic cell differentiation.
MedLine Citation:
PMID:  22871569     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Dendritic cells (DC) are sentinels of the immune system deriving from circulating monocyte precursors recruited to sites of inflammation. In a previous report (Del Prete et al., 2008) we showed that, after differentiation, DC exhibited increased number of condensed mitochondria and dynamic changes in their energy metabolism. A study is presented here showing that the DC differentiation process is characterized by increased expression level and activity of mitochondrial respiratory complexes, as well as by an increased mitochondrial DNA (mtDNA) copy number. Moreover, DC are equipped with more efficient antioxidant protection systems, over expressed most likely to detoxify increased ROS production, as a consequence of the much higher mitochondrial activity. Kinetic analysis of the three main mitochondrial biogenesis-associated genes revealed that the peak in PPARγ coactivator-1alpha (PGC-1α) gene expression was suddenly reached few hours after the onset of the differentiation. While PGC-1α expression rapidly declines, the mitochondrial transcription factor A (TFAM) and nuclear respiratory factor-1 (NRF-1) expression gradually increased. These findings demonstrate that an active mitochondrial biogenesis occurs during DC differentiation and further suggest that an early input by the master regulator of mitochondrial biogenesis PGC-1α is needed to trigger the subsequent activation of the downstream transcription factors, NRF-1 and TFAM in this process.
Authors:
Patrizia Zaccagnino; Maddalena Saltarella; Stefania Maiorano; Antonio Gaballo; Giuseppe Santoro; Beatrice Nico; Michele Lorusso; Annalisa Del Prete
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-31
Journal Detail:
Title:  The international journal of biochemistry & cell biology     Volume:  -     ISSN:  1878-5875     ISO Abbreviation:  Int. J. Biochem. Cell Biol.     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-8-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9508482     Medline TA:  Int J Biochem Cell Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Ltd.
Affiliation:
Department of Basic Medical Sciences, University of Bari, Piazza G. Cesare 11, 70124 Bari, Italy.
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