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Published on: October 6, 2017
DNA polymerases as therapeutic targets
1Department of Pharmacology, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, USA. ajb15@case.edu
Abstract:
Numerous pathological states, including cancer, autoimmune diseases, and viral/bacterial infections, are often attributed to uncontrollable DNA replication. Inhibiting this essential biological process provides an obvious therapeutic target against these diseases. A logical target is the DNA polymerase, the enzyme responsible for catalyzing the addition of mononucleotides to a growing polymer using a DNA or RNA template as a guide for directing each incorporation event. This review provides a summary of therapeutic agents that target polymerase activity. A discussion of the biological function and mechanism of polymerases is first provided to illustrate the strategy for therapeutic intervention as well as the rational design of various nucleoside analogues that inhibit various polymerases associated with viral infections and cancer. The development of nucleoside and non-nucleoside inhibitors as antiviral agents is discussed with particular emphasis on their mechanism of action, structure-activity relationships, toxicity, and mechanism of resistance. In addition, commonly used anticancer agents are described to illustrate the similarities and differences associated with various nucleoside analogues as therapeutic agents. Finally, new therapeutic approaches that include the inhibition of selective polymerases involved in DNA repair and/or translesion DNA synthesis as anticancer agents are discussed.
Insights
Targeting DNA replication by inhibiting DNA polymerases offers therapeutic potential for cancer and infections. This review summarizes agents that block polymerase activity, including nucleoside analogues, for treating diseases.
Area of Science:
- Biochemistry
- Molecular Biology
- Pharmacology
Background:
- Uncontrolled DNA replication is implicated in various diseases, including cancer and infections.
- DNA polymerases are key enzymes in DNA replication and thus represent critical therapeutic targets.
- Inhibiting DNA polymerase activity offers a strategy for developing novel treatments.
Purpose of the Study:
- To review therapeutic agents targeting DNA polymerase activity.
- To discuss the mechanism of action, structure-activity relationships, and resistance of polymerase inhibitors.
- To explore new therapeutic approaches targeting DNA repair and translesion synthesis polymerases.
Main Methods:
- Literature review of therapeutic agents targeting DNA polymerases.
- Discussion of biological function and mechanism of polymerases.
- Analysis of nucleoside and non-nucleoside inhibitors for antiviral and anticancer applications.
Main Results:
- Nucleoside analogues are effective inhibitors of viral and cancer-associated polymerases.
- Understanding structure-activity relationships aids in rational drug design.
- Resistance mechanisms and toxicity are critical considerations for therapeutic development.
Conclusions:
- Inhibitors of DNA polymerases are valuable therapeutic agents for viral infections and cancer.
- Targeting DNA repair and translesion synthesis polymerases presents a promising new avenue for anticancer therapy.
- Further research into selective polymerase inhibition can lead to more effective and safer treatments.
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