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Park S, Choi C, Kim H, Shin YJ, Oh Y, Park W, Cho WK, Kim N. Olaparib enhances sensitization of BRCA-proficient breast cancer cells to x-rays and protons. Breast Cancer Res Treat 2024; 203:449-461. [PMID: 37902934 DOI: 10.1007/s10549-023-07150-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 09/29/2023] [Indexed: 11/01/2023]
Abstract
PURPOSE This study aimed to compare the radiosensitizing effect of the PARP inhibitor, Olaparib, between proton and X-rays irradiations in BRCA-proficient breast cancer (BC) cells. METHODS Two BRCA-proficient BC cell lines, MDA-MB-231 and T47D BC, were used. Cell proliferation was assessed using the CCK-8 assay, and radiosensitivity was determined through the clonogenic survival assay. Flow cytometry was employed to analyze cell cycle distribution and apoptosis. The kinetics of DNA damage repair were evaluated using γH2AX immunofluorescence imaging and the comet assay. Tumor spheroid assays were conducted to test radiosensitivity in a three-dimensional culture condition. RESULTS Olaparib sensitized both MDA-MB-231 and T47D cells to proton and X-ray irradiation in the clonogenic assay. MDA-MB-231 cells exhibited a higher dose enhancement factor for Olaparib than T47D cells. Olaparib increased radiation-induced G2/M cell cycle arrest and apoptosis specifically in MDA-MB-231 cells. γH2AX immunostaining and the comet assay showed Olaparib augmented radiation-induced DNA damage and apoptosis. The enhancement effect of Olaparib was more pronounced in proton irradiation than in X-ray irradiation, particularly in MDA-MB-231 cells than T47D cells. Both radiation and Olaparib dose-dependently inhibited spheroid growth in both cell lines. The synergy scores demonstrated that Olaparib interacted more strongly with protons than X-rays. The addition of an ATR inhibitor further enhanced Olaparib-induced proton radiosensitization in MDA-MB-231 cells. CONCLUSION This study found that Olaparib enhanced radiation efficacy in BRCA-proficient breast cancer cells, with a more pronounced effect observed with proton irradiation compared to X-ray irradiation. Combining Olaparib with an ATR inhibitor increased the radiosensitizing effect of protons.
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Affiliation(s)
- Sohee Park
- Department of Radiation Oncology, Samsung Medical Center, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Changhoon Choi
- Department of Radiation Oncology, Samsung Medical Center, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea.
| | - Haeyoung Kim
- Department of Radiation Oncology, Samsung Medical Center, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea.
- Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
| | - Yong Jae Shin
- Innovative Institute for Precision Medicine, Samsung Medical Center, Seoul, Republic of Korea
| | - Yunjeong Oh
- Innovative Institute for Precision Medicine, Samsung Medical Center, Seoul, Republic of Korea
| | - Won Park
- Department of Radiation Oncology, Samsung Medical Center, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
- Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Won Kyung Cho
- Department of Radiation Oncology, Samsung Medical Center, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Nalee Kim
- Department of Radiation Oncology, Samsung Medical Center, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
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Dong M, Luo H, Liu R, Zhang J, Yang Z, Wang D, Wang Y, Chen J, Ou Y, Zhang Q, Wang X. Radiosensitization of Osteosarcoma Cells Using the PARP Inhibitor Olaparib Combined with X-rays or Carbon Ions. J Cancer 2024; 15:699-713. [PMID: 38213724 PMCID: PMC10777037 DOI: 10.7150/jca.90371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 11/14/2023] [Indexed: 01/13/2024] Open
Abstract
Objective: Osteosarcomas are derived from bone-forming mesenchymal cells that are insensitive to radiation. This study aimed to investigate the radiosensitization of osteosarcoma cells (U2OS and K7M2) using the PARP inhibitor olaparib combined with X-rays or carbon ions (C-ions). Methods: The effect of olaparib on the proliferation of osteosarcoma cells after irradiation was assessed using CCK-8 and clone formation assays. Cells were treated with olaparib and/or radiation and the effects of olaparib on the cell cycle and apoptosis were analysed by flow cytometry after 48h. Immunofluorescence was used to stain the nuclei, γ-H2AX, 53BP1, and Rad51 proteins, and the number of γ-H2AX, 53BP1, and Rad51 foci was observed under a fluorescence microscope. The effect of olaparib combined with radiation on double-stranded DNA breaks in osteosarcoma cells was evaluated. Results: At the same radiation dose, olaparib reduced the proliferation and colony formation ability of irradiated osteosarcoma cells (P < 0.05). Olaparib monotherapy induced minimal apoptotic effects and G2/M phase arrest in osteosarcoma cells and irradiation alone induced moderate apoptosis and G2/M phase arrest. However, radiation combined with olaparib significantly increased the percentage of apoptotic cells and G2/M phase arrest in osteosarcoma cells (P < 0.05). Immunofluorescence experiments showed that compared to the radiation group, the formation of γ-H2AX and 53BP1 foci was significantly increased in the combined group (P < 0.05). The expression levels of Rad51 foci in the irradiated group were higher than those in the control group (P < 0.05). However, the number of Rad51 foci in the combined group was significantly decreased (P < 0.05). Conclusion: The PARP inhibitor olaparib combined with irradiation (X-rays or C-ions) enhanced the radiosensitivity of osteosarcoma cell lines (U2OS and K7M2). Our findings provide a potential theoretical basis for the clinical application of olaparib in overcoming radiation resistance in osteosarcoma.
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Affiliation(s)
- Meng Dong
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
- Clinical Medical College & Affiliated Hospital of Chengdu University, Chengdu, China
| | - Hongtao Luo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
- Department of Postgraduate, University of Chinese Academy of Sciences, Beijing, China
- Heavy Ion Therapy Center, Lanzhou Heavy Ions Hospital, Lanzhou, China
| | - Ruifeng Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
- Department of Postgraduate, University of Chinese Academy of Sciences, Beijing, China
- Heavy Ion Therapy Center, Lanzhou Heavy Ions Hospital, Lanzhou, China
| | - Jinhua Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
- Department of Postgraduate, University of Chinese Academy of Sciences, Beijing, China
| | - Zhen Yang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
- Gansu University of Chinese Medicine, Lanzhou, China
| | - Dandan Wang
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Yuhang Wang
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Junru Chen
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Yuhong Ou
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Qiuning Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
- Department of Postgraduate, University of Chinese Academy of Sciences, Beijing, China
- Heavy Ion Therapy Center, Lanzhou Heavy Ions Hospital, Lanzhou, China
| | - Xiaohu Wang
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
- Department of Postgraduate, University of Chinese Academy of Sciences, Beijing, China
- Heavy Ion Therapy Center, Lanzhou Heavy Ions Hospital, Lanzhou, China
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Palubeckaitė I, Venneker S, van den Akker BEWM, Briaire-de Bruijn IH, Boveé JVMG. Does PARP Inhibition Sensitize Chondrosarcoma Cell Lines to Chemotherapy or Radiotherapy? Results From a Three-dimensional Spheroid Cell Model. Clin Orthop Relat Res 2023; 481:608-619. [PMID: 36729612 PMCID: PMC9928768 DOI: 10.1097/corr.0000000000002483] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 10/17/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND Chondrosarcomas are well known for their resistance to conventional chemotherapy and radiotherapy treatment regimens, which is particularly detrimental in patients who have unresectable tumors. Recently, inhibition of poly(ADP-ribose) polymerase (PARP) by talazoparib was shown to sensitize chondrosarcoma cell lines to chemotherapy (temozolomide) or radiotherapy, irrespective of isocitrate dehydrogenase (IDH) mutation status. Because two-dimensionally grown cell lines have limitations and may not accurately represent the clinical response to drug treatment, we aimed to use a more representative three-dimensional alginate spheroid chondrosarcoma model. It is important to test therapeutic agents in vitro before testing them in animals or humans; therefore, we aimed to determine the effectiveness of a PARP inhibitor in reducing the viability of chondrosarcoma spheroids. Using a more stringent, complex in vitro model refines future therapeutic options for further investigation in animal models, increasing efficiency, reducing unnecessary animal use, and saving time and cost. QUESTIONS/PURPOSES (1) Does talazoparib treatment slow or inhibit the growth of chondrosarcoma spheroids, and does an increased treatment duration change the drug's effect? (2) Does talazoparib work in synergy with temozolomide treatment to reduce the viability of chondrosarcoma spheroids? (3) Does talazoparib work in synergy with radiotherapy treatment to reduce the viability of chondrosarcoma spheroids? METHODS Three representative conventional chondrosarcoma cell lines (CH2879 [IDH wildtype], JJ012 [IDH1 mutant], and SW1353 [IDH2 mutant]) were cultured as alginate spheroids and treated with talazoparib (0.001 to 10 µM), temozolomide (0.01 to 100 µM), or combinations of these drugs for 3, 7, and 14 days, representing different stages of spheroid growth. The cell lines were selected to represent a variety of IDH mutation statuses and were previously validated in spheroid culturing. Temozolomide was chosen because of its previous success when combined with PARP inhibitors, dissimilar to other commonly used chemotherapies. The effect on spheroid viability was assessed using three cell viability assays. Additionally, spheroid count, morphology, proliferation, and apoptosis were assessed. The effect of talazoparib (5 to 10 nM) combined with ƴ-radiation applied using a 137 C source (0 to 6 Gy) was assessed as surviving fractions by counting the number of spheroids (three). The therapeutic synergy of low-concentration talazoparib (5 to 10 nM) with temozolomide or radiotherapy was determined by calculating Excess over Bliss scores. RESULTS Talazoparib treatment reduced the spheroid viability of all three cell lines after 14 days (IC 50 ± SD of CH2879: 0.1 ± 0.03 µM, fold change: 220; JJ012: 12 ± 1.4 µM, fold change: 4.8; and SW1353: 1.0 ± 0.2 µM, fold change: 154), compared with 3-day treatments of mature spheroids. After 14 days of treatment, the Excess over Bliss scores for 100 µM temozolomide and talazoparib indicated synergistic efficacy (Excess over Bliss scores: CH2879 59% [lower 95% CI 52%], JJ012 18% [lower 95% CI 8%], and SW1353 55% [lower 95% CI 25%]) of this combination treatment. A stable synergistic effect of talazoparib and radiotherapy was present only in JJ012 spheroids at a 4Gƴ radiation dose (Excess over Bliss score: 22% [lower 95% CI 6%]). CONCLUSION In our study, long-term PARP inhibition was more effective than short-term treatment, and only one of the three chondrosarcoma spheroid lines was sensitive to combined PARP inhibition and radiotherapy. These findings suggest subsequent animal studies should focus on long-term PARP inhibition, and temozolomide combined with talazoparib has a higher chance of success than combination with radiotherapy. CLINICAL RELEVANCE Combination treatment of talazoparib and temozolomide was effective in reducing the viability of chondrosarcoma spheroids and spheroid growth, regardless of IDH mutation status, providing rationale to replicate this treatment combination in an animal chondrosarcoma model.
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Affiliation(s)
- Ieva Palubeckaitė
- Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands
| | - Sanne Venneker
- Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands
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Yakovlev VA, Sullivan SA, Fields EC, Temkin SM. PARP inhibitors in the treatment of ARID1A mutant ovarian clear cell cancer: PI3K/Akt1-dependent mechanism of synthetic lethality. Front Oncol 2023; 13:1124147. [PMID: 36910637 PMCID: PMC9992988 DOI: 10.3389/fonc.2023.1124147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/13/2023] [Indexed: 02/24/2023] Open
Abstract
Introduction Poly(ADP-ribose) polymerase (PARP) is a nuclear enzyme involved in the repair of DNA single-strand breaks (SSB). The recent development of poly(ADP-ribose) polymerase inhibitors (PARPi) results from over 45 years of studies. When the activity of PARP1 or PARP2 is compromised, DNA SSB lesions are unresolved and can be converted to DNA double-strand breaks (DSBs) by the cellular transcription mechanisms. ARID1A (also called BAF250a) is an important component of the mammalian Switch/Sucrose Non-Fermentable (SWI/SNF) chromatin-remodeling complex. ARID1A gene demonstrates >50% of mutation rate in ovarian clear-cell carcinomas (OCCC). Mutated or downregulated ARID1A significantly compromises the Homologous Recombination Repair (HRR) of DNA DSB. Results The present study demonstrated that downregulated or mutated ARID1A attenuates DNA HRR through stimulation of the PI3K/Akt1 pathway and makes tumor cells highly sensitive to PARPi and PARPi/ionizing radiation (IR) combination. We showed that PI3K/Akt1 pathway plays an important role in the sensitization of cancer cell lines with compromised function of ARID1A to PARPi treatment. Discussion We believe that using of PARPi monotherapy or in combination with radiation therapy is an appealing strategy for treating ARID1A-mutated cancers, as well as many other types of PI3K/Akt1-driven cancers.
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Affiliation(s)
- Vasily A Yakovlev
- Department of Radiation Oncology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, United States
| | - Stephanie A Sullivan
- Gynecologic Oncology Division, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, United States
| | - Emma C Fields
- Department of Radiation Oncology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, United States
| | - Sarah M Temkin
- Gynecologic Oncology Division, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, United States
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Brown SR, Hinsley S, Hall E, Hurt C, Baird RD, Forster M, Scarsbrook AF, Adams RA. A Road Map for Designing Phase I Clinical Trials of Radiotherapy-Novel Agent Combinations. Clin Cancer Res 2022; 28:3639-3651. [PMID: 35552622 PMCID: PMC9433953 DOI: 10.1158/1078-0432.ccr-21-4087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/26/2022] [Accepted: 04/28/2022] [Indexed: 01/07/2023]
Abstract
Radiotherapy has proven efficacy in a wide range of cancers. There is growing interest in evaluating radiotherapy-novel agent combinations and a drive to initiate this earlier in the clinical development of the novel agent, where the scientific rationale and preclinical evidence for a radiotherapy combination approach are high. Optimal design, delivery, and interpretation of studies are essential. In particular, the design of phase I studies to determine safety and dosing is critical to an efficient development strategy. There is significant interest in early-phase research among scientific and clinical communities over recent years, at a time when the scrutiny of the trial methodology has significantly increased. To enhance trial design, optimize safety, and promote efficient trial conduct, this position paper reviews the current phase I trial design landscape. Key design characteristics extracted from 37 methodology papers were used to define a road map and a design selection process for phase I radiotherapy-novel agent trials. Design selection is based on single- or dual-therapy dose escalation, dose-limiting toxicity categorization, maximum tolerated dose determination, subgroup evaluation, software availability, and design performance. Fifteen of the 37 designs were identified as being immediately accessible and relevant to radiotherapy-novel agent phase I trials. Applied examples of using the road map are presented. Developing these studies is intensive, highlighting the need for funding and statistical input early in the trial development to ensure appropriate design and implementation from the outset. The application of this road map will improve the design of phase I radiotherapy-novel agent combination trials, enabling a more efficient development pathway.
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Affiliation(s)
- Sarah R. Brown
- Leeds Cancer Research UK Clinical Trials Unit, Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, United Kingdom
| | - Samantha Hinsley
- Clinical Trials Unit Glasgow, University of Glasgow, Glasgow, United Kingdom
| | - Emma Hall
- Clinical Trials and Statistics Unit, The Institute of Cancer Research, London, United Kingdom
| | - Chris Hurt
- Centre for Trials Research, Cardiff University, Cardiff, United Kingdom
| | | | | | - Andrew F. Scarsbrook
- Radiotherapy Research Group, Leeds Institute of Medical Research at St James's, Faculty of Medicine and Health, University of Leeds, Leeds, United Kingdom
| | - Richard A. Adams
- Centre for Trials Research, Cardiff University and Velindre Cancer Centre, Cardiff, United Kingdom
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Bejar FG, Oaknin A, Williamson C, Mayadev J, Peters PN, Secord AA, Wield AM, Coffman LG. Novel Therapies in Gynecologic Cancer. Am Soc Clin Oncol Educ Book 2022; 42:1-17. [PMID: 35594502 DOI: 10.1200/edbk_351294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
During the past decade, considerable strides have been made in the understanding and treatment of gynecologic cancers. The advent of PARP inhibitors, antiangiogenic therapies, immunotherapy combinations, and targeted agents have altered the standard of care in ovarian, endometrial, and cervical cancers. However, continued advancement in the treatment of gynecologic cancers is critical. Fortunately, exciting work defining new therapeutic targets and novel treatment strategies is on the horizon. Here, we discuss emerging treatments for gynecologic cancers, including endometrial, cervical, ovarian, and rare gynecologic cancers. We highlight research that has deepened our understanding of the unique biology and molecular underpinnings of these cancers and is being translated into powerful new treatment approaches. We particularly highlight the advent of immunotherapy in endometrial cancer; radiosensitizers in cervical, vaginal, and vulvar cancers; targeted therapies in ovarian cancer; and molecularly driven approaches to treat rare gynecologic cancers. Continued basic, translational, and clinical research holds the promise to change the landscape of gynecologic cancer and improve the lives of all women impacted by these diseases.
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Affiliation(s)
- Francisco Grau Bejar
- Gynaecologic Cancer Programme, Vall d'Hebron Institute of Oncology, Vall d'Hebron University Hospital, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Ana Oaknin
- Gynaecologic Cancer Programme, Vall d'Hebron Institute of Oncology, Vall d'Hebron University Hospital, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Casey Williamson
- Department of Radiation Medicine and Applied Sciences, University of California San Diego, La Jolla, CA
| | - Jyoti Mayadev
- Department of Radiation Medicine and Applied Sciences, University of California San Diego, La Jolla, CA
| | - Pamela N Peters
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Duke Cancer Institute, Duke University Medical Center, Durham, NC
| | - Angeles Alvarez Secord
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Duke Cancer Institute, Duke University Medical Center, Durham, NC
| | - Alyssa M Wield
- Division of Gynecologic Oncology, Department of Obstetrics, Gynecology and Reproductive Sciences, Magee-Womens Hospital, Pittsburgh, PA
| | - Lan G Coffman
- Division of Gynecologic Oncology, Department of Obstetrics, Gynecology and Reproductive Sciences, Magee-Womens Hospital, Pittsburgh, PA.,Division of Hematology/Oncology, Department of Medicine, Hillman Cancer Center, Magee-Womens Research Institute, Pittsburgh, PA
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Tong Y, Kikuhara S, Onodera T, Chen L, Myat AB, Imamichi S, Sasaki Y, Murakami Y, Nozaki T, Fujimori H, Masutani M. Radiosensitization to γ-Ray by Functional Inhibition of APOBEC3G. Int J Mol Sci 2022; 23:5069. [PMID: 35563460 PMCID: PMC9100529 DOI: 10.3390/ijms23095069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 04/24/2022] [Accepted: 04/26/2022] [Indexed: 02/05/2023] Open
Abstract
The radiosensitization of tumor cells is one of the promising approaches for enhancing radiation damage to cancer cells and limiting radiation effects on normal tissue. In this study, we performed a comprehensive screening of radiosensitization targets in human lung cancer cell line A549 using an shRNA library and identified apolipoprotein B mRNA editing enzyme catalytic subunit 3G (APOBEC3G: A3G) as a candidate target. APOBEC3G is an innate restriction factor that inhibits HIV-1 infection as a cytidine deaminase. APOBEC3G knockdown with siRNA showed an increased radiosensitivity in several cancer cell lines, including pancreatic cancer MIAPaCa2 cells and lung cancer A549 cells. Cell cycle analysis revealed that APOBEC3G knockdown increased S-phase arrest in MIAPaCa2 and G2/M arrest in A549 cells after γ-irradiation. DNA double-strand break marker γH2AX level was increased in APOBEC3G-knocked-down MIAPaCa2 cells after γ-irradiation. Using a xenograft model of A549 in mice, enhanced radiosensitivity by a combination of X-ray irradiation and APOBEC3G knockdown was observed. These results suggest that the functional inhibition of APOBEC3G sensitizes cancer cells to radiation by attenuating the activation of the DNA repair pathway, suggesting that APOBEC3G could be useful as a target for the radiosensitization of cancer therapy.
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Affiliation(s)
- Ying Tong
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
| | - Sota Kikuhara
- Lab of Collaborative Research, Division of Cellular Signaling and Central Radioisotope Division, National Cancer Center Research Institute, Tokyo 104-0045, Japan;
- Department of Biological Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, Tokyo 162-8601, Japan;
| | - Takae Onodera
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
- Lab of Collaborative Research, Division of Cellular Signaling and Central Radioisotope Division, National Cancer Center Research Institute, Tokyo 104-0045, Japan;
| | - Lichao Chen
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
- Lab of Collaborative Research, Division of Cellular Signaling and Central Radioisotope Division, National Cancer Center Research Institute, Tokyo 104-0045, Japan;
| | - Aung Bhone Myat
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
| | - Shoji Imamichi
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
- Lab of Collaborative Research, Division of Cellular Signaling and Central Radioisotope Division, National Cancer Center Research Institute, Tokyo 104-0045, Japan;
| | - Yuka Sasaki
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
- Lab of Collaborative Research, Division of Cellular Signaling and Central Radioisotope Division, National Cancer Center Research Institute, Tokyo 104-0045, Japan;
- Department of Pharmacology, Faculty of Dentistry, Osaka Dental University, 8-1 Hirakata, Osaka 573-1144, Japan
| | - Yasufumi Murakami
- Department of Biological Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, Tokyo 162-8601, Japan;
| | - Tadashige Nozaki
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
- Department of Pharmacology, Faculty of Dentistry, Osaka Dental University, 8-1 Hirakata, Osaka 573-1144, Japan
| | - Hiroaki Fujimori
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
- Lab of Collaborative Research, Division of Cellular Signaling and Central Radioisotope Division, National Cancer Center Research Institute, Tokyo 104-0045, Japan;
| | - Mitsuko Masutani
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan; (Y.T.); (T.O.); (L.C.); (A.B.M.); (S.I.); (Y.S.); (T.N.); (H.F.)
- Lab of Collaborative Research, Division of Cellular Signaling and Central Radioisotope Division, National Cancer Center Research Institute, Tokyo 104-0045, Japan;
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Barcellini A, Loap P, Murata K, Villa R, Kirova Y, Okonogi N, Orlandi E. PARP Inhibitors in Combination with Radiotherapy: To Do or Not to Do? Cancers (Basel) 2021; 13:cancers13215380. [PMID: 34771545 PMCID: PMC8582502 DOI: 10.3390/cancers13215380] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/18/2021] [Accepted: 10/25/2021] [Indexed: 11/29/2022] Open
Abstract
Simple Summary Despite the large use of inhibitors of Poly-ADP ribose polymerase (PARP-I), the feasibility and safety of their combination with radiotherapy (RT) are unclear. The combination may be particularly interesting in the oligometastatic setting in which patients may benefit from local RT during the treatment with PARP-I. The aim of the current review was to evaluate the outcome and the toxicity in patients with newly diagnosed or recurrent tumors treated with a combination of PARP-I and RT. A total of 12 clinical studies met the inclusion criteria and, despite the heterogeneity of the evaluated patient populations and tumor types, this review suggests that a combination approach is feasible even though the efficacy profile remains unclear. Abstract Background: Despite the large use of inhibitors of Poly-ADP ribose polymerase (PARP-I), the feasibility and safety of their combination with radiotherapy (RT) is unclear. Aim: We conducted a literature analysis with the aim to evaluate the efficacy and safety profile of a combination with RT and PARP-I. Method: The key issues for the current review were expressed in two questions according to the Population, Intervention, Control, Outcome (PICO) criteria: 1. What is the outcome and 2. What is the toxicity in patients treated with a combination of PARP-I and RT for a newly diagnosed or recurrent tumors? Results: A total of 12 clinical studies met the inclusion criteria including seven single-arm dose-escalation phase I studies, two phase II (two- and three-arms controlled trials) trials, one parallel-arm phase I study, and two phase I/II studies published between 2015 and 2021. RT was performed with photon beams and several schedules according to the clinical situation. The acute toxicity ≥ grade 3 ranged between 25% and >96%, which was divided into hematological or non-hematological adverse events. Conclusions: despite the heterogeneity of the evaluated patient populations and tumor types, and the limited number of the studies, this review suggests that a combination approach is feasible even though the efficacy profile remains unclear.
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Affiliation(s)
- Amelia Barcellini
- Radiation Oncology Clinical Department, National Center for Oncological Hadrontherapy (CNAO), 27100 Pavia, Italy; (A.B.); (R.V.); (E.O.)
| | - Pierre Loap
- Radiation Oncology Clinical Department, National Center for Oncological Hadrontherapy (CNAO), 27100 Pavia, Italy; (A.B.); (R.V.); (E.O.)
- Department of Radiation Oncology, Institut Curie, 75005 Paris, France;
- Correspondence:
| | - Kazutoshi Murata
- National Institutes for Quantum and Radiological Science and Technology, QST Hospital, Chiba 263-0024, Japan; (K.M.); (N.O.)
| | - Riccardo Villa
- Radiation Oncology Clinical Department, National Center for Oncological Hadrontherapy (CNAO), 27100 Pavia, Italy; (A.B.); (R.V.); (E.O.)
| | - Youlia Kirova
- Department of Radiation Oncology, Institut Curie, 75005 Paris, France;
| | - Noriyuki Okonogi
- National Institutes for Quantum and Radiological Science and Technology, QST Hospital, Chiba 263-0024, Japan; (K.M.); (N.O.)
| | - Ester Orlandi
- Radiation Oncology Clinical Department, National Center for Oncological Hadrontherapy (CNAO), 27100 Pavia, Italy; (A.B.); (R.V.); (E.O.)
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9
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Creation of a new class of radiosensitizers for glioblastoma based on the mibefradil pharmacophore. Oncotarget 2021; 12:891-906. [PMID: 33953843 PMCID: PMC8092340 DOI: 10.18632/oncotarget.27933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/22/2021] [Indexed: 12/15/2022] Open
Abstract
Glioblastoma (GBM) is the most common primary malignant tumor of the central nervous system with a dismal prognosis. Locoregional failure is common despite high doses of radiation therapy, which has prompted great interest in developing novel strategies to radiosensitize these cancers. Our group previously identified a calcium channel blocker (CCB), mibefradil, as a potential GBM radiosensitizer. We discovered that mibefradil selectively inhibits a key DNA repair pathway, alternative non-homologous end joining. We then initiated a phase I clinical trial that revealed promising initial efficacy of mibefradil, but further development was hampered by dose-limiting toxicities, including CCB-related cardiotoxicity, off-target hERG channel and cytochrome P450 enzymes (CYPs) interactions. Here, we show that mibefradil inhibits DNA repair independent of its CCB activity, and report a series of mibefradil analogues which lack CCB activity and demonstrate reduced hERG and CYP activity while retaining potency as DNA repair inhibitors. We present in vivo pharmacokinetic studies of the top analogues with evidence of brain penetration. We also report a targeted siRNA-based screen which suggests a possible role for mTOR and Akt in DNA repair inhibition by this class of drugs. Taken together, these data reveal a new class of mibefradil-based DNA repair inhibitors which can be further advanced into pre-clinical testing and eventually clinical trials, as potential GBM radiosensitizers.
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10
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Zuo X, Zhao H, Li D. Systematic inhibitor selectivity between PARP1 and PARP2 enzymes: Molecular implications for ovarian cancer personalized therapy. J Mol Recognit 2021; 34:e2891. [PMID: 33684965 DOI: 10.1002/jmr.2891] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/26/2021] [Accepted: 02/05/2021] [Indexed: 12/19/2022]
Abstract
Human poly(ADP-ribose) polymerases (PARPs) are a class of nuclear enzymes involved in the pathogenesis of diverse gynecologic tumors. The PARP1 and PARP2 are the two most documented members in PARP family, which have been approved as the druggable targets of ovarian and cervical cancers. Selective targeting of the two enzymes with small-molecule inhibitors is a great challenge due to the high conservation in catalytic domain and active site. Here, we investigate the systematic selectivity profile of sophisticated PARP inhibitors between the two enzymes. Computational methods are used to model/optimize the complex structures of inhibitor ligands with PARP1/2 catalytic domains and then to estimate the theoretical Fenzymatic assays exhibit a good consistence with theoretical selectivity over six tested inhibitor samples (rc 2 = 0.857). It is revealed that the inhibitor selectivity is conferred from the exquisite difference in the residue composition and structural architecture of both the local activity sites and the whole catalytic domains of the two enzymes. In particular, the TMZ50 and ME0328 show strong selectivity between PARP1 and PARP2, but only the former has a potent activity on the two enzymes, whereas the latter can only inhibit the enzymes moderately. These compounds can be considered as potential lead molecular entities to develop new specific PARP-selective inhibitor drugs for personalized therapy combating gynecologic cancers.
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Affiliation(s)
- Xueqian Zuo
- Department of Gynaecology, Cangzhou People's Hospital Affiliated to Cangzhou Medical College, Cangzhou, China
| | - Haibo Zhao
- Department of Gynaecology, Cangzhou People's Hospital Affiliated to Cangzhou Medical College, Cangzhou, China
| | - Dan Li
- Department of Gynaecology, Cangzhou People's Hospital Affiliated to Cangzhou Medical College, Cangzhou, China
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11
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Fife K, Bang A. Combined Radiotherapy and New Systemic Therapies - Have We Moved Beyond Palliation? Clin Oncol (R Coll Radiol) 2020; 32:758-765. [PMID: 32863071 DOI: 10.1016/j.clon.2020.07.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/23/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022]
Abstract
The new systemic therapies for cancer are having major impacts on the prognosis of patients with advanced cancers, some achieving long-term survival with targeted therapy or immune checkpoint inhibitors. Interactions of radiotherapy with the new systemic therapies are reviewed. Many agents increase radiosensitivity and particular caution is required combining BRAF inhibitors and radiotherapy because of significant toxicity. Most new systemic therapies can be used safely with palliative doses of radiotherapy, but it is important to be aware of overlapping toxicities depending on the site treated. DNA damage response modulators increase radiosensitivity and may potentially increase radiation toxicity but are at an earlier stage of development. Stereotactic ablative radiotherapy may produce further survival gains in patients responding to targeted therapy and immunotherapy.
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Affiliation(s)
- K Fife
- Oncology Department, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK.
| | - A Bang
- Division of Radiation Oncology, University of British Columbia/BC Cancer, Victoria, British Columbia, Canada
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