» Articles » PMID: 35568026

Exploiting Replication Gaps for Cancer Therapy

Overview
Journal Mol Cell
Publisher Cell Press
Specialty Cell Biology
Date 2022 May 14
PMID 35568026
Authors
Affiliations
Soon will be listed here.
Abstract

Defects in DNA double-strand break repair are thought to render BRCA1 or BRCA2 (BRCA) mutant tumors selectively sensitive to PARP inhibitors (PARPis). Challenging this framework, BRCA and PARP1 share functions in DNA synthesis on the lagging strand. Thus, BRCA deficiency or "BRCAness" could reflect an inherent lagging strand problem that is vulnerable to drugs such as PARPi that also target the lagging strand, a combination that generates a toxic accumulation of replication gaps.

Citing Articles

The Landscape of PARP Inhibitors in Solid Cancers.

Muzzana M, Broggini M, Damia G Onco Targets Ther. 2025; 18:297-317.

PMID: 40051775 PMC: 11884256. DOI: 10.2147/OTT.S499226.


TRIP13 protects pancreatic cancer cells against intrinsic and therapy-induced DNA replication stress.

Anand J, Droby G, Joseph S, Patel U, Zhang X, Klomp J bioRxiv. 2025; .

PMID: 39975297 PMC: 11838190. DOI: 10.1101/2025.01.26.634889.


Targeting BRCA1-deficient PARP inhibitor-resistant cells with nickases reveals nick resection as a cancer vulnerability.

Whalen J, Earley J, Wisniewski C, Mercurio A, Cantor S Nat Cancer. 2025; 6(2):278-291.

PMID: 39838098 DOI: 10.1038/s43018-024-00902-1.


PARG inhibitor sensitivity correlates with accumulation of single-stranded DNA gaps in preclinical models of ovarian cancer.

Ravindranathan R, Somuncu O, da Costa A, Mukkavalli S, Lamarre B, Nguyen H Proc Natl Acad Sci U S A. 2024; 121(47):e2413954121.

PMID: 39546575 PMC: 11588084. DOI: 10.1073/pnas.2413954121.


Positioning loss of PARP1 activity as the central toxic event in BRCA-deficient cancer.

MacGilvary N, Cantor S DNA Repair (Amst). 2024; 144:103775.

PMID: 39461277 PMC: 11611662. DOI: 10.1016/j.dnarep.2024.103775.


References
1.
Peng M, Cong K, Panzarino N, Nayak S, Calvo J, Deng B . Opposing Roles of FANCJ and HLTF Protect Forks and Restrain Replication during Stress. Cell Rep. 2018; 24(12):3251-3261. PMC: 6218949. DOI: 10.1016/j.celrep.2018.08.065. View

2.
Quinet A, Tirman S, Jackson J, Svikovic S, Lemacon D, Carvajal-Maldonado D . PRIMPOL-Mediated Adaptive Response Suppresses Replication Fork Reversal in BRCA-Deficient Cells. Mol Cell. 2019; 77(3):461-474.e9. PMC: 7007862. DOI: 10.1016/j.molcel.2019.10.008. View

3.
Schlacher K, Christ N, Siaud N, Egashira A, Wu H, Jasin M . Double-strand break repair-independent role for BRCA2 in blocking stalled replication fork degradation by MRE11. Cell. 2011; 145(4):529-42. PMC: 3261725. DOI: 10.1016/j.cell.2011.03.041. View

4.
Wojtaszek J, Chatterjee N, Najeeb J, Ramos A, Lee M, Bian K . A Small Molecule Targeting Mutagenic Translesion Synthesis Improves Chemotherapy. Cell. 2019; 178(1):152-159.e11. PMC: 6644000. DOI: 10.1016/j.cell.2019.05.028. View

5.
Pilie P, Gay C, Byers L, OConnor M, Yap T . PARP Inhibitors: Extending Benefit Beyond -Mutant Cancers. Clin Cancer Res. 2019; 25(13):3759-3771. DOI: 10.1158/1078-0432.CCR-18-0968. View