Cited by 383DNA Repair MechanismsPARP inhibition in cancer therapyCancer-related Molecular Pathways

The DOI matches its Crossref record; 136 of the 140 references it cites were found in a registry or an index.

DNA Repair Pathways in Cancer Therapy and Resistance

Open access
Li, Lan-ya, Guan, Yi-di, Chen, Xi-sha, Yang, Jin-ming, Cheng, Yan·2021·Frontiers in Pharmacology

Abstract

DNA repair pathways are triggered to maintain genetic stability and integrity when mammalian cells are exposed to endogenous or exogenous DNA-damaging agents. The deregulation of DNA repair pathways is associated with the initiation and progression of cancer. As the primary anti-cancer therapies, ionizing radiation and chemotherapeutic agents induce cell death by directly or indirectly causing DNA damage, dysregulation of the DNA damage response may contribute to hypersensitivity or resistance of cancer cells to genotoxic agents and targeting DNA repair pathway can increase the tumor sensitivity to cancer therapies. Therefore, targeting DNA repair pathways may be a potential therapeutic approach for cancer treatment. A better understanding of the biology and the regulatory mechanisms of DNA repair pathways has the potential to facilitate the development of inhibitors of nuclear and mitochondria DNA repair pathways for enhancing anticancer effect of DNA damage-based therapy.

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Crossref · 10.3389/fphar.2020.629266

Cites

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Figures

FIGURE 1 DNA damage response. DNA damage is caused by endogenous agent oxygen species (ROS) or exogenous agents such as UV light, ionizing radiation (IR) and chemotherapy agents. DNA damage response (DDR) is induced to deal with the lesions, including signal transduction, transcriptional regulation, cell-cycle checkpoints, induction of apoptosis, multiple DNA repair pathways as well as damage tolerance processes. DNA repair pathways include nuclear and mitochondrial DNA repair pathways. Direct repair, BER, MMR and recombinational repair (HR and NHEJ) are existence in both nuclear and mitochondrial repair systems. NER has been reported only appearance in nucleus, and the existence of TLS pathway in mitochondria is unknown. NDNA, nuclear DNA; MtDNA, mitochondrial DNA; BER, base excision repair; HR, homologous recombination repair; NHEJ, non-homologous end joining; MMR, mismatch repair; TLS, translesion synthesis; NER, nucleotide excision repair.
FIGURE 1 DNA damage response. DNA damage is caused by endogenous agent oxygen species (ROS) or exogenous agents such as UV light, ionizing radiation (IR) and chemotherapy agents. DNA damage response (DDR) is induced to deal with the lesions, including signal transduction, transcriptional regulation, cell-cycle checkpoints, induction of apoptosis, multiple DNA repair pathways as well as damage tolerance processes. DNA repair pathways include nuclear and mitochondrial DNA repair pathways. Direct repair, BER, MMR and recombinational repair (HR and NHEJ) are existence in both nuclear and mitochondrial repair systems. NER has been reported only appearance in nucleus, and the existence of TLS pathway in mitochondria is unknown. NDNA, nuclear DNA; MtDNA, mitochondrial DNA; BER, base excision repair; HR, homologous recombination repair; NHEJ, non-homologous end joining; MMR, mismatch repair; TLS, translesion synthesis; NER, nucleotide excision repair.CC BY · PubMed Central
FIGURE 2 Mechanism and function of PARP and PARP inhibitors. The catalytic function of PARP1 is activated through binding to the SSBs site cuased by alkylating agents. Activated PARP1 undergo PARylation and recruitment of a serials of key DNA repair effectors involved in BER to repair DNA lesion. Finally, PARP1 release from DNA and regain inactive state. PARP inhibitors binds the catalytic site of PARP and impaired of the enzymatic activity of PARP which “trap” PARP1 on DNA, results in suppression of the catalytic cycle of PARP1 and BER. Trapping PARP1 on DNA lesion also collapses DNA replication fork, therefore transforming SSBs into genotoxic DSBs. This type of DNA lesion would normally induce HR for repairing damaged DNA. However, if HR-defective exist in tumor cells, including BRCA1/2 deficiency or mutation, another less effective and error-prone DSBs repair pathway NHEJ or alt-NHEJ could be utilized, which causing genomic instability, chromosomal fusions/translocations and subsequently inducing cell death. SSBs, single-strand breaks; DSB, double-strand break; BER, base excision repair; alt-NHEJ, alternative nonhomologous end joining; NHEJ, non-homologous end joining; HR, homologous recombination repair.
FIGURE 2 Mechanism and function of PARP and PARP inhibitors. The catalytic function of PARP1 is activated through binding to the SSBs site cuased by alkylating agents. Activated PARP1 undergo PARylation and recruitment of a serials of key DNA repair effectors involved in BER to repair DNA lesion. Finally, PARP1 release from DNA and regain inactive state. PARP inhibitors binds the catalytic site of PARP and impaired of the enzymatic activity of PARP which “trap” PARP1 on DNA, results in suppression of the catalytic cycle of PARP1 and BER. Trapping PARP1 on DNA lesion also collapses DNA replication fork, therefore transforming SSBs into genotoxic DSBs. This type of DNA lesion would normally induce HR for repairing damaged DNA. However, if HR-defective exist in tumor cells, including BRCA1/2 deficiency or mutation, another less effective and error-prone DSBs repair pathway NHEJ or alt-NHEJ could be utilized, which causing genomic instability, chromosomal fusions/translocations and subsequently inducing cell death. SSBs, single-strand breaks; DSB, double-strand break; BER, base excision repair; alt-NHEJ, alternative nonhomologous end joining; NHEJ, non-homologous end joining; HR, homologous recombination repair.CC BY · PubMed Central

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Citations

Cites

Research works printed but not linked: 3

  1. Anderson, 1980, The presence of nuclear and mitochondrial uracil-DNA glycosylase in extracts of human KB cells, Nucleic Acids Res, 4, 875
  2. Liu, 2003, Blockage of abasic site repair enhances antitumor efficacy of 1,3-bis-(2-chloroethyl)-1-nitrosourea in colon tumor xenografts, Mol. Cancer Ther, 10, 1061
  3. Luo, 2004, Inhibition of the human apurinic/apyrimidinic endonuclease (APE1) repair activity and sensitization of breast cancer cells to DNA alkylating agents with lucanthone, Anticancer Res, 4, 2127

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Metadata

Authors
Li, L.-Y., Guan, Y.-D., Chen, X.-S., Yang, J.-M., & Cheng, Y.
Affiliations
Central South University (CN)
Corresponding author
Cheng, Yan
Venue
Frontiers in Pharmacology
Published
2021-02-08
Volume
11
Pages
629266-629266
ISSN
1663-9812 (ISSN-L)
OpenAlex
W3127551105
Cited by
383
References
140
Citations by year
2026: 40 · 2025: 81 · 2024: 86 · 2023: 93 · 2022: 69 · 2021: 14
FWCI
7.08
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Pharmacology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • UKnowledge (University of Kentucky) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Natural Science Foundation of China (81422051 81472593 31401208)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
DNA repair pathways, DNA damage response, cancer therapy, chemoresistance, ionizing radiation, DNA-damaging agents, DNA repair inhibitors, mitochondrial DNA repair, tumor sensitivity

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