Aluminum stimulates uptake of non-transferrin bound iron and transferrin bound iron in human glial cells

Yongbae Kim, Luisa Olivi, Jae Hoon Cheong, Alex Maertens, Joseph P. Bressler

Research output: Contribution to journalArticle

Abstract

Aluminum and other trivalent metals were shown to stimulate uptake of transferrin bound iron and nontransferrin bound iron in erytholeukemia and hepatoma cells. Because of the association between aluminum and Alzheimer's Disease, and findings of higher levels of iron in Alzheimer's disease brains, the effects of aluminum on iron homeostasis were examined in a human glial cell line. Aluminum stimulated dose- and time-dependent uptake of nontransferrin bound iron and iron bound to transferrin. A transporter was likely involved in the uptake of nontransferrin iron because uptake reached saturation, was temperature-dependent, and attenuated by inhibitors of protein synthesis. Interestingly, the effects of aluminum were not blocked by inhibitors of RNA synthesis. Aluminum also decreased the amount of iron bound to ferritin though it did not affect levels of divalent metal transporter 1. These results suggest that aluminum disrupts iron homeostasis in the brain by several mechanisms including the transferrin receptor, a nontransferrin iron transporter, and ferritin.

Original languageEnglish (US)
Pages (from-to)349-356
Number of pages8
JournalToxicology and Applied Pharmacology
Volume220
Issue number3
DOIs
StatePublished - May 1 2007

Keywords

  • Aluminum
  • Glial
  • Iron
  • Transferrin
  • Transporters

ASJC Scopus subject areas

  • Toxicology
  • Pharmacology

Fingerprint Dive into the research topics of 'Aluminum stimulates uptake of non-transferrin bound iron and transferrin bound iron in human glial cells'. Together they form a unique fingerprint.

  • Cite this