Phosphorylation of rat brain cytoskeletal proteins is increased after orally administered aluminum

Gail V.W. Johnson, Richard S. Jope

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

In rats, administration of 0.3% aluminum in the drinking water for 4-5 weeks significantly increased the in vivo incorporation of 32-phosphorus (3Pi) into proteins with apparent molecular weights of 300 and 210 kDa in the brainstem and cerebral cortex. The identities of these two phosphoproteins as microtubule-associated protein-2 (MAP-2) and the 200 kDa neurofilament subunit (NF), respectively, were established using immunoprecipitation techniques with monoclonal antibodies. Aluminum treatment did not significantly change the amount of MAP-2 or 200 kDa NF in the cerebral cortex and brainstem. Phosphorylation of MAP-2 in aluminum-treated rats in the brainstem and cerebral cortex was 163 and 155% of control values, respectively. The phosphorylation of 200 kDa NF in the brainstem and cerebral cortex of aluminum-treated rats was 148 and 209% of control values, respectively. These results demonstrate that chronic oral aluminum administration to rats increases the phosphorylation of certain cytoskeletal proteins. This treatment regimen may provide a model system with which the mechanisms and consequences of altered in vivo phosphorylation of cytoskeletal proteins can be studied.

Original languageEnglish (US)
Pages (from-to)95-103
Number of pages9
JournalBrain Research
Volume456
Issue number1
DOIs
StatePublished - Jul 19 1988
Externally publishedYes

Keywords

  • Aluminum
  • Cytoskeletal protein phosphorylation
  • Microtubule-associated protein 2
  • Neurofilament

ASJC Scopus subject areas

  • Developmental Biology
  • Molecular Biology
  • Clinical Neurology
  • Neuroscience(all)

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