Poly(ADP-ribose) polymerase

Molecular Neurobiology - Tập 31 - Trang 149-167 - 2005
Robert Piotr Strosznajder1, Henryk Jesko2, Agata Zambrzycka2
1Department of Neurophysiology, Polish Academy of Sciences, Warsaw, Poland
2Department of Cellular Signaling, Medical Research Centre Polish Academy of Sciences, Warsaw, Poland

Tóm tắt

Poly(ADP-ribose) polymerase (PARP)-1 is a DNA nick sensor that transforms ADP-ribose from βNAD+ in the form of polymer to over 40 nuclear proteins, particularly to histones, several transcription factors, and PARP itself, modulating their activities and functions. PARP-1 activated by DNA breaks facilitates transcription, replication, and DNA base excision repair. The last studies indicate that PARP-1 is the new nuclear target for fast signals evoked in cell membranes by depolarization and cholinergic and glutaminergic receptors stimulation. Excessive activation of PARP-1 by peroxynitrate-evoked DNA damage during oxidative stress can cause cell death by NAD+/ATP depletion after ischemia-reperfusion injury, inflammation, and diabetes mellitus. The PARP-1 through interaction with nuclear factor-κB, p53, and other transcription factors might significantly modulate cell survival and death and a type of death pathway. The pharmacological modulation of PARP-1 might offer a new effective approach for neuroprotection.

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