Aluminium interferes with hippocampal calcium signaling in a species-specific manner

Christiane M Nday, Benjamin D Drever, Thanos Salifoglou, Bettina Platt

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Aluminium (Al) has been implicated in a number of neurodegenerative disorders and the disruption of calcium homeostasis has been proposed as a possible mechanism. To investigate ligand- and structure-specific effects of Al species, calcium imaging was used to probe the influence of five Al complexes - in comparison to inorganic Al (Al-S) - on N-methyl d-aspartate receptor (NMDAR) and voltage-dependent calcium channel (VDCC) function in hippocampal neurontos. The Al complexes utilized comprised three Al-citrate species (AlCit1-3), Al-quinate (AlQ) and Al-N-phosphonomethyliminodiacetate (AlNTAP). Our results suggest variable toxicity among the Al compounds tested: Al-S most potently affected neurons, with a full and irreversible inhibition of NMDAR and VDCC signaling at 500 microM. At all concentrations tested (10, 100, and 500 microM), all Al compounds investigated inhibited NMDA responses, however, no dose-dependency was evident. Furthermore, striking differences were noted with respect to calcium responses via VDCC activation. AlCit2 reduced calcium responses at all concentrations tested, AlQ at 10 and 100 microM, and AlNTAP at 500 microM only. In contrast, AlCit1 and AlCit3 had no significant effect. Collectively, diversely structured Al-ligand species selectively affect neuronal membrane channel function. The distinct chemical reactivity of the various Al forms reflects their unique interactions with neuronal structures and is poised to explain the diverse facets of Al toxicity.
Original languageEnglish
Pages (from-to)919-927
Number of pages9
JournalJournal of Inorganic Biochemistry
Volume104
Issue number9
Early online date28 Apr 2010
DOIs
Publication statusPublished - Sep 2010

Keywords

  • toxicity
  • ligand
  • hippocampal culture
  • signalling
  • NMDAR
  • VDCC

Fingerprint Dive into the research topics of 'Aluminium interferes with hippocampal calcium signaling in a species-specific manner'. Together they form a unique fingerprint.

  • Cite this