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Poly(ADP-ribose) polymerase as a drug target for cardiovascular disease and cancer: an update
Eszter M Horvath1, Csaba Szabó
1Department of Surgery, University of Medicine and Dentistry of New Jersey, Newark, New Jersey 07103-2714, USA.
Abstract:
Poly(ADP-ribose) polymerase-1 (PARP-1) is a member of the PARP enzyme family consisting of PARP-1 and four additional, recently identified poly(ADP-ribosylating) enzymes. PARP-1 is one of the most abundant nuclear proteins and functions as a DNA nick sensor enzyme. Upon binding to DNA breaks, activated PARP cleaves NAD+ into nicotinamide and ADP-ribose and polymerizes the latter onto nuclear acceptor proteins including histones, transcription factors and PARP itself. On one hand, PARP is viewed as a guardian angel of genomic integrity, and inhibition of PARP has been used to facilitate the death of tumor cells alone, or in combination with antitumor agents. On the other hand, overactivation of PARP in response to oxidant- and free radical-mediated excessive DNA single strand breaks promotes cell dysfunction and necrotic type cell death in a variety of pathophysiological conditions. Pharmacological inhibition of PARP, consequently, exerts cytoprotective effects in a variety of diseases including stroke, myocardial infarction, heart failure and diabetes mellitus. The research into the role of PARP in diabetic cardiovascular injury is now supported by novel tools such as new classes of potent inhibitors of PARP as well as genetically engineered animals lacking the gene for PARP. In addition, potent PARP inhibitors have entered the stage of clinical testing. The current review provides an update on the most recent developments in the area of PARP.
Insights
Poly(ADP-ribose) polymerase-1 (PARP-1) plays a dual role in cell survival and death. PARP inhibition offers therapeutic potential for cancer and cardiovascular diseases, with new inhibitors advancing to clinical trials.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Poly(ADP-ribose) polymerase-1 (PARP-1) is a crucial nuclear protein involved in DNA repair.
- PARP-1 acts as a DNA nick sensor, initiating cellular responses to DNA damage.
- The PARP enzyme family includes PARP-1 and four other related enzymes.
Purpose of the Study:
- To review recent advancements in Poly(ADP-ribose) polymerase-1 (PARP-1) research.
- To explore the dual role of PARP-1 in genomic integrity and cell death.
- To highlight the therapeutic potential of PARP inhibitors in various diseases.
Main Methods:
- Review of current scientific literature on PARP-1.
- Analysis of novel PARP inhibitors and genetically engineered animal models.
- Examination of clinical trial data for PARP inhibitors.
Main Results:
- PARP-1 inhibition can induce tumor cell death, alone or with other agents.
- Overactivation of PARP-1 contributes to cell dysfunction and death in pathological conditions.
- PARP inhibition demonstrates cytoprotective effects in diseases like stroke, heart attack, and diabetes.
Conclusions:
- PARP-1 is a significant target for therapeutic intervention.
- PARP inhibitors show promise in treating cancer and cardiovascular diseases.
- Ongoing research and clinical trials are expanding the applications of PARP inhibitors.
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