Abstract:
:Osteoporosis is a frequent problem in disorders characterized by iron overload, such as the thalassemias and hereditary hemochromatosis. The exact role of iron in the development of osteoporosis in these disorders is not established. To define the effect of iron excess in bone, we generated an iron-overloaded mouse by injecting iron dextran at 2 doses into C57/BL6 mice for 2 months. Compared with the placebo group, iron-overloaded mice exhibited dose-dependent increased tissue iron content, changes in bone composition, and trabecular and cortical thinning of bone accompanied by increased bone resorption. Iron-overloaded mice had increased reactive oxygen species and elevated serum tumor necrosis factor-α and interleukin-6 concentrations that correlated with severity of iron overload. Treatment of iron-overloaded mice with the antioxidant N-acetyl-L-cysteine prevented the development of trabecular but not cortical bone abnormalities. This is the first study to demonstrate that iron overload in mice results in increased bone resorption and oxidative stress, leading to changes in bone microarchitecture and material properties and thus bone loss.
journal_name
Bloodjournal_title
Bloodauthors
Tsay J,Yang Z,Ross FP,Cunningham-Rundles S,Lin H,Coleman R,Mayer-Kuckuk P,Doty SB,Grady RW,Giardina PJ,Boskey AL,Vogiatzi MGdoi
10.1182/blood-2009-12-260083subject
Has Abstractpub_date
2010-10-07 00:00:00pages
2582-9issue
14eissn
0006-4971issn
1528-0020pii
blood-2009-12-260083journal_volume
116pub_type
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