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Tytuł artykułu

Effect of amyloid beta peptide on poly[ADP-ribose] polymerase activity in adult and aged rat hippocampus

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
It is suggested that the fibrillar amyloid beta peptide (Abeta) in brain plays a direct role in neurodegeneration in Alzheimer's disease, probably through activation of reactive oxygen species formation. Free radicals and numerous neurotoxins elicit DNA damage that subsequently activates poly(ADP-ribose) polymerase (PARP, EC 2.4.2.30). In this study the effect of neurotoxic fragment (25-35) of full length Abeta peptide on PARP activity in adult and aged rat hippocampus was investigated. In adult (4 month old) rat hippocampus the Abeta 25-35 peptide significantly enhanced PARP activity by about 80% but had no effect on PARP activity in cerebral cortex and in hippocampus from aged (24-27 month old) rats. The effect of Abeta peptide was reduced by half by the nitric oxide synthase inhibitor N-nitro-L-arginine. Stimulation of glutamate receptor(s) itself enhanced PARP activity by about 80% in adult hippocampus. However, Abeta 25-35 did not exert any additional stimulatory effect. These results indicate that Abeta, through NO and probably other free radicals, induces activation of DNA bound PARP activity exclusively in adult but not in aged hippocampus.

Wydawca

-

Rocznik

Tom

47

Numer

3

Opis fizyczny

p.847-854,fig.

Twórcy

  • Polish Academy of Sciences, A.Pawinskiego 5, 02-106 Warsaw, Poland
autor

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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