1
|
Liu ZS, Sinha S, Bannister M, Song A, Arriaga-Gomez E, McKeeken AJ, Bonner EA, Hanson BK, Sarchi M, Takashima K, Zong D, Corral VM, Nguyen E, Yoo J, Chiraphapphaiboon W, Leibson C, McMahon MC, Rai S, Swisher EM, Sachs Z, Chatla S, Stirewalt DL, Deeg HJ, Skorski T, Papapetrou EP, Walter MJ, Graubert TA, Doulatov S, Lee SC, Nguyen HD. R-Loop Accumulation in Spliceosome Mutant Leukemias Confers Sensitivity to PARP1 Inhibition by Triggering Transcription-Replication Conflicts. Cancer Res 2024; 84:577-597. [PMID: 37967363 PMCID: PMC10922727 DOI: 10.1158/0008-5472.can-23-3239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/09/2023] [Accepted: 11/13/2023] [Indexed: 11/17/2023]
Abstract
RNA splicing factor (SF) gene mutations are commonly observed in patients with myeloid malignancies. Here we showed that SRSF2- and U2AF1-mutant leukemias are preferentially sensitive to PARP inhibitors (PARPi), despite being proficient in homologous recombination repair. Instead, SF-mutant leukemias exhibited R-loop accumulation that elicited an R-loop-associated PARP1 response, rendering cells dependent on PARP1 activity for survival. Consequently, PARPi induced DNA damage and cell death in SF-mutant leukemias in an R-loop-dependent manner. PARPi further increased aberrant R-loop levels, causing higher transcription-replication collisions and triggering ATR activation in SF-mutant leukemias. Ultimately, PARPi-induced DNA damage and cell death in SF-mutant leukemias could be enhanced by ATR inhibition. Finally, the level of PARP1 activity at R-loops correlated with PARPi sensitivity, suggesting that R-loop-associated PARP1 activity could be predictive of PARPi sensitivity in patients harboring SF gene mutations. This study highlights the potential of targeting different R-loop response pathways caused by spliceosome gene mutations as a therapeutic strategy for treating cancer. SIGNIFICANCE Spliceosome-mutant leukemias accumulate R-loops and require PARP1 to resolve transcription-replication conflicts and genomic instability, providing rationale to repurpose FDA-approved PARP inhibitors for patients carrying spliceosome gene mutations.
Collapse
Affiliation(s)
- Zhiyan Silvia Liu
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
- These authors contributed equally
| | - Sayantani Sinha
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- These authors contributed equally
| | - Maxwell Bannister
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Axia Song
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Erica Arriaga-Gomez
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Alexander J. McKeeken
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
- Bioinformatics and Computational Biology Program, University of Minnesota, Minneapolis, MN, USA
| | - Elizabeth A. Bonner
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Molecular and Cellular Biology Graduate Program, University of Washington, Seattle, WA, USA
| | - Benjamin K. Hanson
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
- Department of Biochemistry, Molecular Biology, and Biophysics Graduate Program, University of Minnesota, Minneapolis, MN, USA
| | - Martina Sarchi
- Division of Hematology and Oncology, Department of Medicine, University of Washington, Seattle, WA, USA
- Department of Molecular Medicine, University of Pavia, 27100 Pavia PV, Italy
| | - Kouhei Takashima
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Institute for Regenerative Medicine and Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Center for Advancement of Blood Cancer Therapies, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Dawei Zong
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Victor M. Corral
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Evan Nguyen
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Jennifer Yoo
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | | | - Cassandra Leibson
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Matthew C. McMahon
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Sumit Rai
- Massachusetts General Hospital Cancer Center, Charlestown, MA
| | - Elizabeth M. Swisher
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, WA 98195
| | - Zohar Sachs
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
- Division of Hematology, Oncology, and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Srinivas Chatla
- Fels Cancer Institute for Personalized Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Derek L. Stirewalt
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - H. Joachim Deeg
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Tomasz Skorski
- Fels Cancer Institute for Personalized Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
- Department of Cancer and Cellular Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Eirini P. Papapetrou
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Institute for Regenerative Medicine and Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Center for Advancement of Blood Cancer Therapies, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Matthew J. Walter
- Division of Oncology, Department of Internal Medicine, Washington University School of Medicine, St Louis, MO, USA
| | | | - Sergei Doulatov
- Division of Hematology and Oncology, Department of Medicine, University of Washington, Seattle, WA, USA
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
- Institute of Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Stanley C. Lee
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Department of Laboratory Medicine & Pathology, University of Washington, Seattle, WA, USA
| | - Hai Dang Nguyen
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| |
Collapse
|
2
|
Corral VM, Schultz ER, Eisenstein RS, Connell GJ. Roquin is a major mediator of iron-regulated changes to transferrin receptor-1 mRNA stability. iScience 2021; 24:102360. [PMID: 33898949 PMCID: PMC8058555 DOI: 10.1016/j.isci.2021.102360] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/18/2020] [Accepted: 03/23/2021] [Indexed: 11/21/2022] Open
Abstract
Transferrin receptor-1 (TfR1) has essential iron transport and proposed signal transduction functions. Proper TfR1 regulation is a requirement for hematopoiesis, neurological development, and the homeostasis of tissues including the intestine and muscle, while dysregulation is associated with cancers and immunodeficiency. TfR1 mRNA degradation is highly regulated, but the identity of the degradation activity remains uncertain. Here, we show with gene knockouts and siRNA knockdowns that two Roquin paralogs are major mediators of iron-regulated changes to the steady-state TfR1 mRNA level within four different cell types (HAP1, HUVEC, L-M, and MEF). Roquin is demonstrated to destabilize the TfR1 mRNA, and its activity is fully dependent on three hairpin loops within the TfR1 mRNA 3′-UTR that are essential for iron-regulated instability. We further show in L-M cells that TfR1 mRNA degradation does not require ongoing translation, consistent with Roquin-mediated instability. We conclude that Roquin is a major effector of TfR1 mRNA abundance. Roquin is a major mediator of iron-regulated TfR1 mRNA instability Roquin-mediated instability requires three stem loops within the TfR1 3′-UTR Iron-regulated TfR1 mRNA instability can occur in the absence of Regnase-1
Collapse
Affiliation(s)
- Victor M Corral
- Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Eric R Schultz
- Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Richard S Eisenstein
- Department of Nutritional Sciences, University of Wisconsin, Madison, WI 53706, USA
| | - Gregory J Connell
- Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA
| |
Collapse
|