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2016 ; 38
(ä): 31-37
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Mitochondrial iron overload: causes and consequences
#MMPMID27026139
Rouault TA
Curr Opin Genet Dev
2016[Jun]; 38
(ä): 31-37
PMID27026139
show ga
Pathological overload of iron in the mitochondrial matrix has been observed in
numerous diseases, including sideroblastic anemias, which have many causes, and
in genetic diseases that affect iron-sulfur cluster biogenesis, heme synthesis,
and mitochondrial protein translation and its products. Although high expression
of the mitochondrial iron importer, mitoferrin, appears to be an underlying
common feature, it is unclear what drives high mitoferrin expression and what
other proteins are involved in trapping excess toxic iron in the mitochondrial
matrix. Numerous examples of human diseases and model systems suggest that
mitochondrial iron homeostasis is coordinated through transcriptional remodeling.
A cytosolic/nuclear molecule may affect a transcriptional factor to coordinate
the events that lead to iron accumulation, but no candidates for this role have
yet been identified.