1
|
Qiu L, Li R, Wang Y, Lu Z, Tu Z, Liu H. PTEN inhibition enhances sensitivity of ovarian cancer cells to the poly (ADP-ribose) polymerase inhibitor by suppressing the MRE11-RAD50-NBN complex. Br J Cancer 2024; 131:577-588. [PMID: 38866962 PMCID: PMC11300449 DOI: 10.1038/s41416-024-02749-w] [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: 09/21/2023] [Revised: 05/29/2024] [Accepted: 06/03/2024] [Indexed: 06/14/2024] Open
Abstract
BACKGROUND Poly (ADP-ribose) polymerase inhibitors (PARPis) can effectively treat ovarian cancer patients with defective homologous recombination (HR). Loss or dysfunction of PTEN, a typical tumour suppressor, impairs double-strand break (DSB) repair. Hence, we explored the possibility of inhibiting PTEN to induce HR deficiency (HRD) for PARPi application. METHODS Functional studies using PTEN inhibitor VO-OHpic and PARPi olaparib were performed to explore the molecular mechanisms in vitro and in vivo. RESULTS In this study, the combination of VO-OHpic with olaparib exhibited synergistic inhibitory effects on ovarian cancer cells was demonstrated. Furthermore, VO-OHpic was shown to enhance DSBs by reducing nuclear expression of PTEN and inhibiting HR repair through the modulation of MRE11-RAD50-NBN (MRN) complex, critical for DSB repair. TCGA and GTEx analysis revealed a strong correlation between PTEN and MRN in ovarian cancer. Mechanistic studies indicated that VO-OHpic reduced expression of MRN, likely by decreasing PTEN/E2F1-mediated transcription. Moreover, PTEN-knockdown inhibited expression of MRN, increased sensitivities to olaparib, and induced DSBs. In vivo experiments showed that the combination of VO-OHpic with olaparib exhibited enhanced inhibitory effects on tumour growth. CONCLUSIONS Collectively, this study highlights the potential of PTEN inhibitors in combination therapy with PARPis to create HRD for HRD-negative ovarian cancers.
Collapse
Affiliation(s)
- Lipeng Qiu
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Ruyan Li
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
- School of Health Medicine, Nantong Institute of Technology, Nantong, 226000, Jiangsu, China
| | - Yue Wang
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Ziwen Lu
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Zhigang Tu
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China.
| | - Hanqing Liu
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, Jiangsu, China.
| |
Collapse
|
2
|
Elkatary RG, El Beltagy HM, Abdo VB, El Fatah DSA, El-Karef A, Ashour RH. Poly (ADP-ribose) polymerase pathway inhibitor (Olaparib) upregulates SERCA2a expression and attenuates doxorubicin-induced cardiomyopathy in mice. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 103:104261. [PMID: 37689219 DOI: 10.1016/j.etap.2023.104261] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/19/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
The cardiotoxicity induced by doxorubicin is dose-dependent. The present study tested the potential cardioprotective effect of Poly ADP Ribose Polymerase (PARP) pathway inhibitor "olaparib" in a mouse model of doxorubicin-induced cardiomyopathy (DOX-CM). Seventy-two male BALB/c mice were randomized into six equal groups; control, DOX-CM, dexrazoxane-treated, and three olaparib-treated groups (5, 10, and 50 mg/kg/day). Cardiomyopathy was assessed by heart weight/Tibial length (HW/TL) ratio, cardiac fibrosis, oxidative stress, and electron microscope. Myocardial expression of SERCA2a mRNA and cleaved PARP-1 protein were also assessed. Similar to dexrazoxane, olaparib (10 mg/kg/day) significantly ameliorated oxidative stress, and preserved cardiac structure. It also suppressed myocardial PARP-1 protein expression and boosted SERCA2a mRNA expression. Olaparib (5 or 50 mg/kg/day) failed to show comparable effects. The current study detected the cardioprotective effect of olaparib at a dosage of 10 mg/kg/day. Also, the present study discovered a new cardioprotective mechanism of dexrazoxane by targeting PARP-1 in the heart.
Collapse
Affiliation(s)
- Rania Gamal Elkatary
- Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | | | - Vivian Boshra Abdo
- Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Dina Sabry Abd El Fatah
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Egypt
| | - Amr El-Karef
- Pathology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt; Horus University-Egypt, New Damietta, Egypt
| | - Rehab Hamdy Ashour
- Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
| |
Collapse
|
3
|
Wu Y, Xu S, Cheng S, Yang J, Wang Y. Clinical application of PARP inhibitors in ovarian cancer: from molecular mechanisms to the current status. J Ovarian Res 2023; 16:6. [PMID: 36611214 PMCID: PMC9826575 DOI: 10.1186/s13048-023-01094-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 01/02/2023] [Indexed: 01/08/2023] Open
Abstract
As a kind of gynecological tumor, ovarian cancer is not as common as cervical cancer and breast cancer, but its malignant degree is higher. Despite the increasingly mature treatment of ovarian cancer, the five-year survival rate of patients is still less than 50%. Based on the concept of synthetic lethality, poly (ADP- ribose) polymerase (PARP) inhibitors target tumor cells with defects in homologous recombination repair(HRR), the most significant being the target gene Breast cancer susceptibility genes(BRCA). PARP inhibitors capture PARP-1 protein at the site of DNA damage to destroy the original reaction, causing the accumulation of PARP-DNA nucleoprotein complexes, resulting in DNA double-strand breaks(DSBs) and cell death. PARP inhibitors have been approved for the treatment of ovarian cancer for several years and achieved good results. However, with the widespread use of PARP inhibitors, more and more attention has been paid to drug resistance and side effects. Therefore, further research is needed to understand the mechanism of PARP inhibitors, to be familiar with the adverse reactions of the drug, to explore the markers of its efficacy and prognosis, and to deal with its drug resistance. This review elaborates the use of PARP inhibitors in ovarian cancer.
Collapse
Affiliation(s)
- Yongsong Wu
- grid.24516.340000000123704535Department of Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai200092, China ,grid.16821.3c0000 0004 0368 8293Obstetrics and Gynecology, School of Medicine, Renji Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Shilin Xu
- grid.16821.3c0000 0004 0368 8293Obstetrics and Gynecology, School of Medicine, Renji Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Shanshan Cheng
- grid.16821.3c0000 0004 0368 8293Obstetrics and Gynecology, School of Medicine, Renji Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Jiani Yang
- grid.24516.340000000123704535Department of Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai200092, China
| | - Yu Wang
- grid.24516.340000000123704535Department of Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai200092, China
| |
Collapse
|
4
|
Jin N, Xia Y, Gao Q. Combined PARP inhibitors and small molecular inhibitors in solid tumor treatment (Review). Int J Oncol 2023; 62:28. [PMID: 36601757 PMCID: PMC9851129 DOI: 10.3892/ijo.2023.5476] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 09/23/2022] [Indexed: 01/05/2023] Open
Abstract
With the development of precision medicine, targeted therapy has attracted extensive attention. Poly(ADP‑ribose) polymerase inhibitors (PARPi) are critical clinical drugs designed to induce cell death and are major antitumor targeted agents. However, preclinical and clinical data have revealed the limitations of PARPi monotherapy. Therefore, their combination with other targeted drugs has become a research hotspot in tumor treatment. Recent studies have demonstrated the critical role of small molecular inhibitors in multiple haematological cancers and solid tumors via cellular signalling modulation, exhibiting potential as a combined pharmacotherapy. In the present review, studies focused on small molecular inhibitors targeting the homologous recombination pathway were summarized and clinical trials evaluating the safety and efficacy of combined treatment were discussed.
Collapse
Affiliation(s)
- Ning Jin
- Key Laboratory of The Ministry of Education, Cancer Biology Research Center, Tongji Hospital, Wuhan, Hubei 430000, P.R. China,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430000, P.R. China
| | - Yu Xia
- Key Laboratory of The Ministry of Education, Cancer Biology Research Center, Tongji Hospital, Wuhan, Hubei 430000, P.R. China,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430000, P.R. China,Correspondence to: Professor Qinglei Gao or Professor Yu Xia, Key Laboratory of The Ministry of Education, Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, Hubei 430000, P.R. China, E-mail: , E-mail:
| | - Qinglei Gao
- Key Laboratory of The Ministry of Education, Cancer Biology Research Center, Tongji Hospital, Wuhan, Hubei 430000, P.R. China,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430000, P.R. China,Correspondence to: Professor Qinglei Gao or Professor Yu Xia, Key Laboratory of The Ministry of Education, Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, Hubei 430000, P.R. China, E-mail: , E-mail:
| |
Collapse
|
5
|
Role of PARP Inhibitors in Cancer Immunotherapy: Potential Friends to Immune Activating Molecules and Foes to Immune Checkpoints. Cancers (Basel) 2022; 14:cancers14225633. [PMID: 36428727 PMCID: PMC9688455 DOI: 10.3390/cancers14225633] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/04/2022] [Accepted: 11/13/2022] [Indexed: 11/19/2022] Open
Abstract
Poly (ADP-ribose) polymerase (PARP) inhibitors (PARPi) induce cytotoxic effects as single agents in tumors characterized by defective repair of DNA double-strand breaks deriving from BRCA1/2 mutations or other abnormalities in genes associated with homologous recombination. Preclinical studies have shown that PARPi-induced DNA damage may affect the tumor immune microenvironment and immune-mediated anti-tumor response through several mechanisms. In particular, increased DNA damage has been shown to induce the activation of type I interferon pathway and up-regulation of PD-L1 expression in cancer cells, which can both enhance sensitivity to Immune Checkpoint Inhibitors (ICIs). Despite the recent approval of ICIs for a number of advanced cancer types based on their ability to reinvigorate T-cell-mediated antitumor immune responses, a consistent percentage of treated patients fail to respond, strongly encouraging the identification of combination therapies to overcome resistance. In the present review, we analyzed both established and unexplored mechanisms that may be elicited by PARPi, supporting immune reactivation and their potential synergism with currently used ICIs. This analysis may indicate novel and possibly patient-specific immune features that might represent new pharmacological targets of PARPi, potentially leading to the identification of predictive biomarkers of response to their combination with ICIs.
Collapse
|
6
|
Broseta JJ, Roca M, Rodríguez-Espinosa D, López-Romero LC, Gómez-Bori A, Cuadrado-Payán E, Bea-Granell S, Devesa-Such R, Soldevila A, Sánchez-Pérez P, Hernández-Jaras J. The metabolomic differential plasma profile between dialysates. Pursuing to understand the mechanisms of citrate dialysate clinical benefits. Front Physiol 2022; 13:1013335. [PMID: 36467686 PMCID: PMC9709283 DOI: 10.3389/fphys.2022.1013335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 10/27/2022] [Indexed: 08/30/2023] Open
Abstract
Background: Currently, bicarbonate-based dialysate needs a buffer to prevent precipitation of bicarbonate salts with the bivalent cations, and acetate at 3-4 mmol/L is the most used. However, citrate is being postulated as a preferred option because of its association with better clinical results by poorly understood mechanisms. In that sense, this hypothesis-generating study aims to identify potential metabolites that could biologically explain these improvements found in patients using citrate dialysate. Methods: A unicentric, cross-over, prospective untargeted metabolomics study was designed to analyze the differences between two dialysates only differing in their buffer, one containing 4 mmol/L of acetate (AD) and the other 1 mmol/L of citrate (CD). Blood samples were collected in four moments (i.e., pre-, mid-, post-, and 30-min-post-dialysis) and analyzed in an untargeted metabolomics approach based on UPLC-Q-ToF mass spectrometry. Results: The 31 most discriminant metabolomic variables from the plasma samples of the 21 participants screened by their potential clinical implications show that, after dialysis with CD, some uremic toxins appear to be better cleared, the lysine degradation pathway is affected, and branched-chain amino acids post-dialysis levels are 9-10 times higher than with AD; and, on its part, dialysis with AD affects acylcarnitine clearance. Conclusion: Although most metabolic changes seen in this study could be attributable to the dialysis treatment itself, this study successfully identifies some metabolic variables that differ between CD and AD, which raise new hypotheses that may unveil the mechanisms involved in the clinical improvements observed with citrate in future research.
Collapse
Affiliation(s)
- José Jesús Broseta
- Department of Nephrology and Renal Transplantation, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Marta Roca
- Analytcal Unit Platform, Medical Research Institute Hospital La Fe (IIS La Fe), Valencia, Spain
| | - Diana Rodríguez-Espinosa
- Department of Nephrology and Renal Transplantation, Hospital Clínic de Barcelona, Barcelona, Spain
| | | | - Aina Gómez-Bori
- Department of Nephrology, Hospital Universitari I Politècnic La Fe, Valencia, Spain
| | - Elena Cuadrado-Payán
- Department of Nephrology and Renal Transplantation, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Sergio Bea-Granell
- Department of Nephrology, Consorci Hospital General Universitari de València, Valencia, Spain
| | - Ramón Devesa-Such
- Department of Nephrology, Hospital Universitari I Politècnic La Fe, Valencia, Spain
| | - Amparo Soldevila
- Department of Nephrology, Hospital Universitari I Politècnic La Fe, Valencia, Spain
| | - Pilar Sánchez-Pérez
- Department of Nephrology, Hospital Universitari I Politècnic La Fe, Valencia, Spain
| | | |
Collapse
|
7
|
Liao M, Beltman J, Giordano H, Harding TC, Maloney L, Simmons AD, Xiao JJ. Clinical Pharmacokinetics and Pharmacodynamics of Rucaparib. Clin Pharmacokinet 2022; 61:1477-1493. [PMID: 36107395 PMCID: PMC9652254 DOI: 10.1007/s40262-022-01157-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/10/2022] [Indexed: 01/31/2023]
Abstract
Rucaparib is an oral small-molecule poly(ADP-ribose) polymerase inhibitor indicated for patients with recurrent ovarian cancer in the maintenance and treatment settings and for patients with metastatic castration-resistant prostate cancer associated with a deleterious BRCA1 or BRCA2 mutation. Rucaparib has a manageable safety profile; the most common adverse events reported were fatigue and nausea in both indications. Accumulation in plasma exposure occurred after repeated administration of the approved 600-mg twice-daily dosage. Steady state was achieved after continuous twice-daily dosing for a week. Rucaparib has moderate oral bioavailability and can be dosed with or without food. Although a high-fat meal weakly increased maximum concentration and area under the curve, the effect was not clinically significant. A mass balance analysis indicated almost a complete dose recovery of rucaparib over 12 days, with metabolism, renal, and hepatic excretion as the elimination routes. A population pharmacokinetic analysis of rucaparib revealed no effect of age, sex, race, or body weight. No starting dose adjustments were necessary for patients with mild-to-moderate hepatic or renal impairment; the effect of severe organ impairment on rucaparib exposure has not been evaluated. In patients, rucaparib moderately inhibited cytochrome P450 (CYP) 1A2 and weakly inhibited CYP3As, CYP2C9, and CYP2C19. Rucaparib weakly increased systemic exposures of oral contraceptives and oral rosuvastatin and marginally increased the exposure of oral digoxin (a P-glycoprotein substrate). In vitro studies suggested that rucaparib inhibits transporters MATE1, MATE2-K, OCT1, and OCT2. No clinically meaningful drug interactions with rucaparib as a perpetrator were observed. An exposure-response analysis revealed dose-dependent changes in selected clinical efficacy and safety endpoints. Overall, this article provides a comprehensive review of the clinical pharmacokinetics, pharmacodynamics, drug-drug interactions, effects of intrinsic and extrinsic factors, and exposure-response relationships of rucaparib.
Collapse
Affiliation(s)
- Mingxiang Liao
- Clovis Oncology, Inc., 500 Flatiron Pkwy, Suite 100, Boulder, CO, 80301, USA
| | - Jeri Beltman
- Clovis Oncology, Inc., 500 Flatiron Pkwy, Suite 100, Boulder, CO, 80301, USA
| | - Heidi Giordano
- Clovis Oncology, Inc., 500 Flatiron Pkwy, Suite 100, Boulder, CO, 80301, USA
| | - Thomas C Harding
- Clovis Oncology, Inc., 500 Flatiron Pkwy, Suite 100, Boulder, CO, 80301, USA
| | - Lara Maloney
- Clovis Oncology, Inc., 500 Flatiron Pkwy, Suite 100, Boulder, CO, 80301, USA
| | - Andrew D Simmons
- Clovis Oncology, Inc., 500 Flatiron Pkwy, Suite 100, Boulder, CO, 80301, USA
| | - Jim J Xiao
- Clovis Oncology, Inc., 500 Flatiron Pkwy, Suite 100, Boulder, CO, 80301, USA.
| |
Collapse
|
8
|
The Drivers, Mechanisms, and Consequences of Genome Instability in HPV-Driven Cancers. Cancers (Basel) 2022; 14:cancers14194623. [PMID: 36230545 PMCID: PMC9564061 DOI: 10.3390/cancers14194623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 11/28/2022] Open
Abstract
Simple Summary Cells infected with high-risk human papillomaviruses (HPV) can accumulate DNA damage and eventually transform into HPV-driven cancers. Genome instability, or the progressive accumulation of DNA alterations (e.g., mutations), in HPV-infected cells is directly induced by the HPV genes and indirectly promoted by HPV infection through the consequences of chronic infection maintenance, increased cell growth, and accumulation of damaging mutations in genes that themselves affect genome instability. While the HPV genome typically exists as a separate entity within cells, genome instability increases the chances of HPV integrating within the host (human) genome, which is common in HPV-induced cancers. The DNA regions surrounding HPV integrations are unstable and can undergo complex alterations that affect both human and HPV genes. This review discusses HPV-dependent and -independent drivers and mechanisms of genome instability in HPV-driven cancers, both globally and around sites of HPV integration, and describes the changes induced in the tumour genome. Abstract Human papillomavirus (HPV) is the causative driver of cervical cancer and a contributing risk factor of head and neck cancer and several anogenital cancers. HPV’s ability to induce genome instability contributes to its oncogenicity. HPV genes can induce genome instability in several ways, including modulating the cell cycle to favour proliferation, interacting with DNA damage repair pathways to bring high-fidelity repair pathways to viral episomes and away from the host genome, inducing DNA-damaging oxidative stress, and altering the length of telomeres. In addition, the presence of a chronic viral infection can lead to immune responses that also cause genome instability of the infected tissue. The HPV genome can become integrated into the host genome during HPV-induced tumorigenesis. Viral integration requires double-stranded breaks on the DNA; therefore, regions around the integration event are prone to structural alterations and themselves are targets of genome instability. In this review, we present the mechanisms by which HPV-dependent and -independent genome instability is initiated and maintained in HPV-driven cancers, both across the genome and at regions of HPV integration.
Collapse
|
9
|
Luo H, Liu Y, Li Y, Zhang C, Yu B, Shao C. Androgen receptor splicing variant 7 (ARv7) promotes DNA damage response in prostate cancer cells. FASEB J 2022; 36:e22495. [PMID: 35947121 DOI: 10.1096/fj.202200190r] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 07/13/2022] [Accepted: 08/01/2022] [Indexed: 11/11/2022]
Abstract
In the treatment of patients with locally advanced prostate cancer (PCa), androgen deprivation therapy (ADT) significantly enhances the efficacy of radiotherapy by weakening the DNA damage response (DDR) pathway. Recently, several studies have suggested that androgen receptor splicing variants (ARvs) may mediate a compensatory DDR pathway when canonical androgen receptor (AR) signaling is inhibited, thus contributing to the resistance of some patients to this combinational treatment. However, the specific roles of certain ARvs as well as the detailed mechanism of how ARvs regulate the DDR are not well understood. Here, we demonstrated that AR splicing variant 7 (ARv7), which is the most abundant form of ARvs, significantly promotes the DDR of PCa cells under severe DNA damage independent of its parental AR by using the ionizing radiation (IR) and doxorubicin (Dox)-treated cell models. Mechanistically, ARv7 is sufficient to upregulate both the homologous recombination (HR) and the nonhomologous end joining (NHEJ) pathways by forming a positive regulatory loop with poly ADP-ribose polymerase 1 (PARP1). Moreover, the presence of ARv7 impairs the synergistic effect between AR antagonists and poly ADP-ribose polymerase (PARP) inhibitor, which has been recently shown to be a promising future treatment strategy for metastatic castration resistant prostate cancer (mCRPC). Combined, our data indicate that constitutively active ARv7 not only contributes to radioresistance after ADT, but may also serve as a potential predictive biomarker for assessing the efficacy of novel PARP inhibitor-based therapy in PCa.
Collapse
Affiliation(s)
- Haoge Luo
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Yanan Liu
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Yang Li
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Chaoke Zhang
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Bingbing Yu
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Chen Shao
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China
| |
Collapse
|
10
|
González-Martín A, Matulonis UA, Korach J, Mirza MR, Moore KN, Wu X, York W, Gupta D, Lechpammer S, Monk BJ. Niraparib treatment for patients with BRCA-mutated ovarian cancer: review of clinical data and therapeutic context. Future Oncol 2022; 18:2505-2536. [PMID: 35791804 DOI: 10.2217/fon-2022-0206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
We reviewed clinical data for niraparib monotherapy in BRCA-mutated (BRCAm) epithelial ovarian cancer (OC), contextualizing results with data from other poly(ADP-ribose) polymerase inhibitors (PARPis). Niraparib reduced the likelihood of progression or death by 60% as first-line maintenance therapy and by 73-78% in recurrent disease. In heavily pretreated OC, efficacy was greater in the BRCAm versus non-BRCAm cohort. Quality-of-life (QoL) was maintained throughout treatment. Adverse events were consistent with the known niraparib safety profile. Cumulative efficacy, safety and QoL evidence demonstrate niraparib maintenance monotherapy has a positive benefit:risk ratio in BRCAm OC. Niraparib significantly improved progression-free survival as first-line maintenance therapy in all patients with OC (i.e., of any biomarker status).
Collapse
Affiliation(s)
- Antonio González-Martín
- Grupo Español de Investigación en Cáncer de Ovario (GEICO) and Medical Oncology Department, Clínica Universidad de Navarra, Madrid, Spain & Program in Solid Tumors, Center for Applied Medical Research (CIMA), Madrid, 31008, Spain
| | - Ursula A Matulonis
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Jacob Korach
- Gynecologic Oncology Department, Chaim Sheba Medical Center, Tel-Hashomer, Sackler School of Medicine, Tel Aviv University, 69978, Israel
| | - Mansoor R Mirza
- Department of Oncology, Rigshospitalet Copenhagen University Hospital, Copenhagen, 2100, Denmark
| | - Kathleen N Moore
- Department of Gynecologic Oncology, Stephenson Cancer Center at the University of Oklahoma Health Science Center, Oklahoma City, OK 73104 & Sarah Cannon Research Institute, Nashville, TN 37203, USA
| | - Xiaohua Wu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - Whitney York
- GlaxoSmithKline, Upper Providence, PA 19426, USA
| | | | | | - Bradley J Monk
- HonorHealth Research Institute & Department of Obstetrics and Gynecology, University of Arizona, Creighton University, Phoenix, AZ 85258, USA
| |
Collapse
|
11
|
Kieffer SR, Lowndes NF. Immediate-Early, Early, and Late Responses to DNA Double Stranded Breaks. Front Genet 2022; 13:793884. [PMID: 35173769 PMCID: PMC8841529 DOI: 10.3389/fgene.2022.793884] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/10/2022] [Indexed: 12/18/2022] Open
Abstract
Loss or rearrangement of genetic information can result from incorrect responses to DNA double strand breaks (DSBs). The cellular responses to DSBs encompass a range of highly coordinated events designed to detect and respond appropriately to the damage, thereby preserving genomic integrity. In analogy with events occurring during viral infection, we appropriate the terms Immediate-Early, Early, and Late to describe the pre-repair responses to DSBs. A distinguishing feature of the Immediate-Early response is that the large protein condensates that form during the Early and Late response and are resolved upon repair, termed foci, are not visible. The Immediate-Early response encompasses initial lesion sensing, involving poly (ADP-ribose) polymerases (PARPs), KU70/80, and MRN, as well as rapid repair by so-called ‘fast-kinetic’ canonical non-homologous end joining (cNHEJ). Initial binding of PARPs and the KU70/80 complex to breaks appears to be mutually exclusive at easily ligatable DSBs that are repaired efficiently by fast-kinetic cNHEJ; a process that is PARP-, ATM-, 53BP1-, Artemis-, and resection-independent. However, at more complex breaks requiring processing, the Immediate-Early response involving PARPs and the ensuing highly dynamic PARylation (polyADP ribosylation) of many substrates may aid recruitment of both KU70/80 and MRN to DSBs. Complex DSBs rely upon the Early response, largely defined by ATM-dependent focal recruitment of many signalling molecules into large condensates, and regulated by complex chromatin dynamics. Finally, the Late response integrates information from cell cycle phase, chromatin context, and type of DSB to determine appropriate pathway choice. Critical to pathway choice is the recruitment of p53 binding protein 1 (53BP1) and breast cancer associated 1 (BRCA1). However, additional factors recruited throughout the DSB response also impact upon pathway choice, although these remain to be fully characterised. The Late response somehow channels DSBs into the appropriate high-fidelity repair pathway, typically either ‘slow-kinetic’ cNHEJ or homologous recombination (HR). Loss of specific components of the DSB repair machinery results in cells utilising remaining factors to effect repair, but often at the cost of increased mutagenesis. Here we discuss the complex regulation of the Immediate-Early, Early, and Late responses to DSBs proceeding repair itself.
Collapse
|
12
|
PARP Inhibitors and Myeloid Neoplasms: A Double-Edged Sword. Cancers (Basel) 2021; 13:cancers13246385. [PMID: 34945003 PMCID: PMC8699275 DOI: 10.3390/cancers13246385] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 12/13/2021] [Accepted: 12/17/2021] [Indexed: 12/24/2022] Open
Abstract
Simple Summary Poly(ADP-ribose) polymerase (PARP) inhibitors, which are medications approved to treat various solid tumors, including breast, prostate, ovarian, and prostate cancers, are being examined in hematological malignancies. This review summarizes the potential role of PARP inhibitors in the treatment of myeloid diseases, particularly acute myeloid leukemia (AML). We review ongoing clinical studies investigating the safety and efficacy of PARP inhibitors in the treatment of AML, focusing on specific molecular and genetic AML subgroups that could be particularly sensitive to PARP inhibitor treatment. We also discuss reports describing an increased risk of treatment-related myeloid neoplasms in patients receiving PARP inhibitors for solid tumors. Abstract Despite recent discoveries and therapeutic advances in aggressive myeloid neoplasms, there remains a pressing need for improved therapies. For instance, in acute myeloid leukemia (AML), while most patients achieve a complete remission with conventional chemotherapy or the combination of a hypomethylating agent and venetoclax, de novo or acquired drug resistance often presents an insurmountable challenge, especially in older patients. Poly(ADP-ribose) polymerase (PARP) enzymes, PARP1 and PARP2, are involved in detecting DNA damage and repairing it through multiple pathways, including base excision repair, single-strand break repair, and double-strand break repair. In the context of AML, PARP inhibitors (PARPi) could potentially exploit the frequently dysfunctional DNA repair pathways that, similar to deficiencies in homologous recombination in BRCA-mutant disease, set the stage for cell killing. PARPi appear to be especially effective in AML with certain gene rearrangements and molecular characteristics (RUNX1-RUNX1T1 and PML-RARA fusions, FLT3- and IDH1-mutated). In addition, PARPi can enhance the efficacy of other agents, particularly alkylating agents, TOP1 poisons, and hypomethylating agents, that induce lesions ordinarily repaired via PARP1-dependent mechanisms. Conversely, emerging reports suggest that long-term treatment with PARPi for solid tumors is associated with an increased incidence of myelodysplastic syndrome (MDS) and AML. Here, we (i) review the pre-clinical and clinical data on the role of PARPi, specifically olaparib, talazoparib, and veliparib, in aggressive myeloid neoplasms and (ii) discuss the reported risk of MDS/AML with PARPi, especially as the indications for PARPi use expand to include patients with potentially curable cancer.
Collapse
|
13
|
Vakili-Samiani S, Turki Jalil A, Abdelbasset WK, Yumashev AV, Karpisheh V, Jalali P, Adibfar S, Ahmadi M, Hosseinpour Feizi AA, Jadidi-Niaragh F. Targeting Wee1 kinase as a therapeutic approach in Hematological Malignancies. DNA Repair (Amst) 2021; 107:103203. [PMID: 34390915 DOI: 10.1016/j.dnarep.2021.103203] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/26/2021] [Accepted: 08/02/2021] [Indexed: 01/30/2023]
Abstract
Hematologic malignancies include various diseases that develop from hematopoietic stem cells of bone marrow or lymphatic organs. Currently, conventional DNA-damage-based chemotherapy drugs are approved as standard therapeutic regimens for these malignancies. Although many improvements have been made, patients with relapsed or refractory hematological malignancies have a poor prognosis. Therefore, novel and practical therapeutic approaches are required for the treatment of these diseases. Interestingly several studies have shown that targeting Wee1 kinase in the Hematological malignancies, including AML, ALL, CML, CLL, DLBCL, BL, MCL, etc., can be an effective therapeutic strategy. It plays an essential role in regulating the cell cycle process by abrogating the G2-M cell-cycle checkpoint, which provides time for DNA damage repair before mitotic entry. Consistently, Wee1 overexpression is observed in various Hematological malignancies. Also, in healthy normal cells, repairing DNA damages occurs due to G1-S checkpoint function; however, in the cancer cells, which have an impaired G1-S checkpoint, the damaged DNA repair process depends on the G2-M checkpoint function. Thus, Wee1 inhibition could be a promising target in the presence of DNA damage in order to potentiate multiple therapeutic drugs. This review summarized the potentials and challenges of Wee1 inhibition combined with other therapies as a novel effective therapeutic strategy in Hematological malignancies.
Collapse
Affiliation(s)
- Sajjad Vakili-Samiani
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran; Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Walid Kamal Abdelbasset
- Department of Health and Rehabilitation Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia; Department of Physical Therapy, Kasr Al-Aini Hospital, Cairo University, Giza, Egypt
| | | | - Vahid Karpisheh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Pooya Jalali
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sara Adibfar
- Department of Immunology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Majid Ahmadi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Farhad Jadidi-Niaragh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
| |
Collapse
|
14
|
Mukherjee J, Pandita A, Kamalakar C, Johannessen TC, Ohba S, Tang Y, Dalle-Ore CL, Bjerkvig R, Pieper RO. RETRACTED: A subset of PARP inhibitors induces lethal telomere fusion in ALT-dependent tumor cells. Sci Transl Med 2021; 13:13/592/eabc7211. [PMID: 33952676 DOI: 10.1126/scitranslmed.abc7211] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/07/2020] [Accepted: 02/26/2021] [Indexed: 12/30/2022]
Abstract
About 10% of all tumors, including most lower-grade astrocytoma, rely on the alternative lengthening of telomere (ALT) mechanism to resolve telomeric shortening and avoid limitations on their growth. Here, we found that dependence on the ALT mechanism made cells hypersensitive to a subset of poly(ADP-ribose) polymerase inhibitors (PARPi). We found that this hypersensitivity was not associated with PARPi-created genomic DNA damage as in most PARPi-sensitive populations but rather with PARPi-induced telomere fusion. Mechanistically, we determined that PARP1 was recruited to the telomeres of ALT-dependent cells as part of a DNA damage response. By recruiting MRE11 and BRCC3 to stabilize TRF2 at the ends of telomeres, PARP1 blocked chromosomal fusion. Exposure of ALT-dependent tumor cells to a subset of PARPi induced a conformational change in PARP1 that limited binding to MRE11 and BRCC3 and delayed release of the TRF2-mediated block on lethal telomeric fusion. These results therefore provide a basis for PARPi treatment of ALT-dependent tumors, as well as establish chromosome fusion as a biomarker of their activity.
Collapse
Affiliation(s)
- Joydeep Mukherjee
- Department of Neurosurgery and The Brain Tumor Center, University of California-San Francisco, San Francisco, CA 94158, USA
| | - Ajay Pandita
- Core Diagnostics, 3535 Breakwater Avenue, Hayward, CA 94545, USA
| | - Chatla Kamalakar
- Department of Integrative Biology, University of California-Berkeley, Berkeley, CA 94720, USA
| | - Tor-Christian Johannessen
- The Kristian Gerhard Jebsen Brain Tumor Research Centre, Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5019, Bergen, Norway
| | - Shigeo Ohba
- Department of Neurosurgery, Fujita Health University, Toyoake 4701192, Aichi, Japan
| | - Yongjian Tang
- Department of Neurosurgery and The Brain Tumor Center, University of California-San Francisco, San Francisco, CA 94158, USA
| | - Cecilia L Dalle-Ore
- Department of Neurosurgery and The Brain Tumor Center, University of California-San Francisco, San Francisco, CA 94158, USA
| | - Rolf Bjerkvig
- The Kristian Gerhard Jebsen Brain Tumor Research Centre, Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5019, Bergen, Norway.,Department of Oncology, Luxembourg Institute of Health, 84, Val Fleuri, L-1526, Luxembourg
| | - Russell O Pieper
- Department of Neurosurgery and The Brain Tumor Center, University of California-San Francisco, San Francisco, CA 94158, USA.
| |
Collapse
|
15
|
Epigenetic Treatment of Urothelial Carcinoma Cells Sensitizes to Cisplatin Chemotherapy and PARP Inhibitor Treatment. Cancers (Basel) 2021; 13:cancers13061376. [PMID: 33803654 PMCID: PMC8002916 DOI: 10.3390/cancers13061376] [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: 03/05/2021] [Accepted: 03/12/2021] [Indexed: 01/02/2023] Open
Abstract
Simple Summary Muscle-invasive urothelial carcinoma of the bladder (UC) is treated with chemotherapies based on the DNA-damaging drug cisplatin, which only works temporarily due to the development of drug resistance. In this study, we show that it may be possible to overcome such resistances by treating the cancer cells with specific epigenetic drugs. We investigated the “epidrug” PLX51107 that inhibits the chromatin regulator BRD4 (Bromodomain Containing 4). PLX51107 inhibited cell growth, caused DNA damage, and blocked DNA repair response in UC cells. Concomitant application of PLX51107 with cisplatin or the drug talazoparib, interfering with DNA repair, caused cell death very efficiently. PLX51107 thus sensitizes UC cells to other drugs and may allow therapy with novel effective anti-tumor drugs like talazoparib that normally only work in a small proportion of patients with specific gene mutations. These results may help to improve current standard therapy and to develop new treatment options urgently required for UC patients. Abstract Muscle-invasive urothelial carcinoma (UC) is treated with cisplatin-based chemotherapy, which is only moderately efficient, mostly due to development of resistance. New therapy approaches are therefore urgently needed. Epigenetic alterations due to frequent mutations in epigenetic regulators contribute to development of the disease and to treatment resistance, and provide targets for novel drug combination therapies. Here, we determined the cytotoxic impact of the second-generation bromodomain protein inhibitor (BETi) PLX51107 on UC cell lines (UCC) and normal HBLAK control cells. PLX51107 inhibited proliferation, induced apoptosis, and acted synergistically with the histone deacetylase inhibitor romidepsin. While PLX51107 caused significant DNA damage, DNA damage signaling and DNA repair were impeded, a state defined as BRCAness. Accordingly, the drug strongly synergized with cisplatin more efficiently than romidepsin, and with the PARP inhibitor talazoparib to inhibit proliferation and induce cell death in UCC. Thus, a BETi can be used to “episensitize” UC cells to cytotoxic chemotherapy and inhibitors of DNA repair by inducing BRCAness in non BRCA1/2 mutated cancers. In clinical applications, the synergy between PLX51107 and other drugs should permit significant dosage reductions to minimize effects on normal tissues.
Collapse
|
16
|
Cañedo EC, Totten S, Ahn R, Savage P, MacNeil D, Hudson J, Autexier C, Deblois G, Park M, Witcher M, Ursini-Siegel J. p66ShcA potentiates the cytotoxic response of triple-negative breast cancers to PARP inhibitors. JCI Insight 2021; 6:138382. [PMID: 33470989 PMCID: PMC7934920 DOI: 10.1172/jci.insight.138382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 01/15/2021] [Indexed: 11/17/2022] Open
Abstract
Triple-negative breast cancers (TNBCs) lack effective targeted therapies, and cytotoxic chemotherapies remain the standard of care for this subtype. Owing to their increased genomic instability, poly (ADP-ribose) polymerase (PARP) inhibitors (PARPi) are being tested against TNBCs. In particular, clinical trials are now interrogating the efficacy of PARPi combined with chemotherapies. Intriguingly, while response rates are low, cohort of patients do respond to PARPi in combination with chemotherapies. Moreover, recent studies suggest that an increase in levels of ROS may sensitize cells to PARPi. This represents a therapeutic opportunity, as several chemotherapies, including doxorubicin, function in part by producing ROS. We previously demonstrated that the p66ShcA adaptor protein is variably expressed in TNBCs. We now show that, in response to therapy-induced stress, p66ShcA stimulated ROS production, which, in turn, potentiated the synergy of PARPi in combination with doxorubicin in TNBCs. This p66ShcA-induced sensitivity relied on the accumulation of oxidative damage in TNBCs, rather than genomic instability, to potentiate cell death. These findings suggest that increasing the expression of p66ShcA protein levels in TNBCs represents a rational approach to bolster the synergy between PARPi and doxorubicin.
Collapse
Affiliation(s)
- Eduardo Cepeda Cañedo
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Division of Experimental Medicine
| | - Stephanie Totten
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Division of Experimental Medicine
| | - Ryuhjin Ahn
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Division of Experimental Medicine
| | - Paul Savage
- Goodman Cancer Research Centre.,Department of Biochemistry, and
| | - Deanna MacNeil
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Department of Anatomy and Cell Biology, McGill University, Montreal, Québec, Canada
| | - Jesse Hudson
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Division of Experimental Medicine
| | - Chantal Autexier
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Department of Anatomy and Cell Biology, McGill University, Montreal, Québec, Canada
| | - Genevieve Deblois
- Institute for Research in Immunology and Cancer, Montreal, Québec, Canada
| | - Morag Park
- Goodman Cancer Research Centre.,Department of Biochemistry, and
| | - Michael Witcher
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Division of Experimental Medicine.,Gerald Bronfman Department of Oncology, McGill University, Montreal, Québec, Canada
| | - Josie Ursini-Siegel
- Lady Davis Institute for Medical Research, Montreal, Québec, Canada.,Division of Experimental Medicine.,Department of Biochemistry, and.,Gerald Bronfman Department of Oncology, McGill University, Montreal, Québec, Canada
| |
Collapse
|
17
|
Xu B, Yin Y, Dong M, Song Y, Li W, Huang X, Wang T, He J, Mu X, Li L, Mu S, Zhang W, Li M. Pamiparib dose escalation in Chinese patients with non-mucinous high-grade ovarian cancer or advanced triple-negative breast cancer. Cancer Med 2020; 10:109-118. [PMID: 33128299 PMCID: PMC7826463 DOI: 10.1002/cam4.3575] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 09/15/2020] [Accepted: 10/10/2020] [Indexed: 12/23/2022] Open
Abstract
Background The recommended phase 2 dose (RP2D) of pamiparib, an investigational PARP1/2 inhibitor, was established as 60 mg twice daily (BID) in a first‐in‐human (FIH) study (NCT02361723). Methods Chinese patients with advanced non‐mucinous high‐grade ovarian cancer (HGOC) or triple‐negative breast cancer (TNBC) whose disease either progressed despite standard therapy, or for which there is no standard therapy were enrolled in the dose‐escalation (DE) portion of a phase 1/2 study (NCT03333915). The primary endpoint was safety/tolerability; secondary objectives were pharmacokinetics and antitumor activity. BRCA1/2 mutation status was retrospectively evaluated. Results Nine HGOC and six TNBC patients (N = 15; n = 4, 20 mg; n = 4, 40 mg; n = 7, 60 mg) were enrolled; as of 30 September 2019, one HGOC patient remained on treatment. Seven patients (n = 5, HGOC; n = 2, TNBC) had germline BRCA1/2 mutation (gBRCAmut); all HGOC patients were resistant/refractory to platinum. Asthenia and nausea (n = 12 each) were the most common treatment‐related adverse events (TRAEs). Decreased hemoglobin was the most common grade 3 TRAE (n = 3); no grade ≥4 AEs were observed. No dose‐limiting toxicities (DLTs) were reported. Pamiparib plasma exposure was similar to exposure observed in the FIH study after a single‐dose administration, albeit slightly higher at steady state. Among 13 RECIST‐evaluable patients, two with HGOC (gBRCAmut, n = 1) achieved a confirmed partial response and six with HGOC (gBRCAmut, n = 4) achieved stable disease; all TNBC RECIST‐evaluable patients (n = 5) reported progressive disease. Conclusions Pamiparib was generally well tolerated in Chinese patients, with durable responses observed in patients with HGOC. Based on these results, pamiparib 60 mg BID was confirmed as the RP2D.
Collapse
Affiliation(s)
- Binghe Xu
- National Cancer Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
| | - Yongmei Yin
- The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina
| | - Mei Dong
- National Cancer Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
| | - Yan Song
- National Cancer Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
| | - Wei Li
- The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina
| | - Xiang Huang
- The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina
| | - Tongshan Wang
- The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina
| | - Jing He
- The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina
| | - Xiyan Mu
- BeiGene (Shanghai) Co., Ltd.ShanghaiChina
| | - Li Li
- BeiGene (Beijing) Co., Ltd.BeijingChina
| | - Song Mu
- BeiGene USA, Inc.San MateoCAUSA
| | - Wa Zhang
- BeiGene (Beijing) Co., Ltd.BeijingChina
| | - Miao Li
- BeiGene (Beijing) Co., Ltd.BeijingChina
| |
Collapse
|
18
|
Curtin NJ, Szabo C. Poly(ADP-ribose) polymerase inhibition: past, present and future. Nat Rev Drug Discov 2020; 19:711-736. [PMID: 32884152 DOI: 10.1038/s41573-020-0076-6] [Citation(s) in RCA: 271] [Impact Index Per Article: 67.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2020] [Indexed: 12/11/2022]
Abstract
The process of poly(ADP-ribosyl)ation and the major enzyme that catalyses this reaction, poly(ADP-ribose) polymerase 1 (PARP1), were discovered more than 50 years ago. Since then, advances in our understanding of the roles of PARP1 in cellular processes such as DNA repair, gene transcription and cell death have allowed the investigation of therapeutic PARP inhibition for a variety of diseases - particularly cancers in which defects in DNA repair pathways make tumour cells highly sensitive to the inhibition of PARP activity. Efforts to identify and evaluate potent PARP inhibitors have so far led to the regulatory approval of four PARP inhibitors for the treatment of several types of cancer, and PARP inhibitors have also shown therapeutic potential in treating non-oncological diseases. This Review provides a timeline of PARP biology and medicinal chemistry, summarizes the pathophysiological processes in which PARP plays a role and highlights key opportunities and challenges in the field, such as counteracting PARP inhibitor resistance during cancer therapy and repurposing PARP inhibitors for the treatment of non-oncological diseases.
Collapse
Affiliation(s)
- Nicola J Curtin
- Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Faculty of Medical Sciences, University of Newcastle, Newcastle upon Tyne, UK.
| | - Csaba Szabo
- Chair of Pharmacology, Section of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
| |
Collapse
|
19
|
Wang CX, Zhang ZL, Yin QK, Tu JL, Wang JE, Xu YH, Rao Y, Ou TM, Huang SL, Li D, Wang HG, Li QJ, Tan JH, Chen SB, Huang ZS. Design, Synthesis, and Evaluation of New Quinazolinone Derivatives that Inhibit Bloom Syndrome Protein (BLM) Helicase, Trigger DNA Damage at the Telomere Region, and Synergize with PARP Inhibitors. J Med Chem 2020; 63:9752-9772. [PMID: 32697083 DOI: 10.1021/acs.jmedchem.0c00917] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
DNA damage response (DDR) pathways are crucial for the survival of cancer cells and are attractive targets for cancer therapy. Bloom syndrome protein (BLM) is a DNA helicase that performs important roles in DDR pathways. Our previous study discovered an effective new BLM inhibitor with a quinazolinone scaffold by a screening assay. Herein, to better understand the structure-activity relationship (SAR) and biological roles of the BLM inhibitor, a series of new derivatives were designed, synthesized, and evaluated based on this scaffold. Among them, compound 9h exhibited nanomolar inhibitory activity and binding affinity for BLM. 9h could effectively disrupt BLM recruitment to DNA in cells. Furthermore, 9h inhibited the proliferation of the colorectal cell line HCT116 by significantly triggering DNA damage in the telomere region and inducing apoptosis, especially in combination with a poly (ADP-ribose) polymerase (PARP) inhibitor. This result suggested a synthetic lethal effect between the BLM and PARP inhibitors in DDR pathways.
Collapse
Affiliation(s)
- Chen-Xi Wang
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Zi-Lin Zhang
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Qi-Kun Yin
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Jia-Li Tu
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Jia-En Wang
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Yao-Hao Xu
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Yong Rao
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Tian-Miao Ou
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Shi-Liang Huang
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Ding Li
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Hong-Gen Wang
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Qing-Jiang Li
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Jia-Heng Tan
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Shuo-Bin Chen
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| | - Zhi-Shu Huang
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Sun Yat-sen University, Guangzhou 510006, China
| |
Collapse
|
20
|
Mancari R, Cutillo G, Bruno V, Vincenzoni C, Mancini E, Baiocco E, Bruni S, Vocaturo G, Chiofalo B, Vizza E. Development of new medical treatment for epithelial ovarian cancer recurrence. Gland Surg 2020; 9:1149-1163. [PMID: 32953630 PMCID: PMC7475356 DOI: 10.21037/gs-20-413] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 07/01/2020] [Indexed: 02/05/2023]
Abstract
Epithelial ovarian cancer (EOC) is the scariest gynaecological cancer. Many advances have been done with evolving knowledge, leading to the introduction of new drugs, most in maintenance setting. The antiangiogenic Bevacizumab and the three approved PARP-inhibitors-olaparib, niraparib and rucaparib-are gradually improving PFS of patients with EOC, with initial effects on OS too. But recurrence is still a heavy sentence and lethality continues to be high. Ovarian cancer is a complex disease, with different clinical presentation, histological aspect, and molecular expression, leading to disappointing results, when using a single drug. Implementation of biobanking and analysis of patients' tumour samples, before starting a treatment, could be a promising way to better understand molecular aspects of this disease, to identify markers predictive of response and to allow a better use of experimental drugs, as immunomodulators, targeted therapies, and combinations of these, to fight tumour growth and clinical progression. We reviewed the literature on the updated treatments for recurrent ovarian cancer, summarizing all the available drugs and combinations to treat patients with this diagnosis, and focusing the attention on the new approved molecules and the contemporary Clinical Trials, investigating new target therapies and new associations.
Collapse
Affiliation(s)
- Rosanna Mancari
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Giuseppe Cutillo
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Valentina Bruno
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Cristina Vincenzoni
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Emanuela Mancini
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Ermelinda Baiocco
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Simone Bruni
- Division of Obstetrics and Gynecology, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Giuseppe Vocaturo
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Benito Chiofalo
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Enrico Vizza
- Department of Experimental Clinical Oncology, Gynecologic Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| |
Collapse
|
21
|
XRN2 Links RNA:DNA Hybrid Resolution to Double Strand Break Repair Pathway Choice. Cancers (Basel) 2020; 12:cancers12071821. [PMID: 32645903 PMCID: PMC7408924 DOI: 10.3390/cancers12071821] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/02/2020] [Accepted: 07/02/2020] [Indexed: 12/17/2022] Open
Abstract
It was recently shown that the 5’ to 3’ exoribonuclease XRN2 is involved in the DNA damage response. Importantly, loss of XRN2 abrogates DNA double stranded break repair via the non-homologous end-joining pathway. However, the mechanistic details of how XRN2 functions in the non-homologous end-joining repair process are unknown. In this study, we elucidated that XRN2-mediated RNA:DNA hybrid resolution is required to allow Ku70 binding to DNA ends. These data suggest that XRN2 is required for the initiation of non-homologous end-joining repair. Interestingly, we uncovered a role for XRN2 in the homologous recombination repair pathway. Loss of XRN2 lead to a decrease in the repair of double strand breaks by homologous recombination. Strikingly, when we removed RNA:DNA hybrids by RNaseH1 over-expression, homologous recombination was not restored. We found RNA:DNA hybrid formation at and downstream of the DSB site, suggesting that unregulated transcription inhibits homologous recombination repair. In summary, our results indicate a relation between RNA:DNA hybrid resolution and double strand break repair pathway choice.
Collapse
|
22
|
Jain CK, Mukhopadhyay S, Ganguly A. RecQ Family Helicases in Replication Fork Remodeling and Repair: Opening New Avenues towards the Identification of Potential Targets for Cancer Chemotherapy. Anticancer Agents Med Chem 2020; 20:1311-1326. [PMID: 32418530 DOI: 10.2174/1871520620666200518082433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 08/08/2019] [Accepted: 12/30/2019] [Indexed: 11/22/2022]
Abstract
Replication fork reversal and restart has gained immense interest as a central response mechanism to replication stress following DNA damage. Although the exact mechanism of fork reversal has not been elucidated precisely, the involvement of diverse pathways and different factors has been demonstrated, which are central to this phenomenon. RecQ helicases known for their vital role in DNA repair and maintaining genome stability has recently been implicated in the restart of regressed replication forks. Through interaction with vital proteins like Poly (ADP) ribose polymerase 1 (PARP1), these helicases participate in the replication fork reversal and restart phenomenon. Most therapeutic agents used for cancer chemotherapy act by causing DNA damage in replicating cells and subsequent cell death. These DNA damages can be repaired by mechanisms involving fork reversal as the key phenomenon eventually reducing the efficacy of the therapeutic agent. Hence the factors contributing to this repair process can be good selective targets for developing more efficient chemotherapeutic agents. In this review, we have discussed in detail the role of various proteins in replication fork reversal and restart with special emphasis on RecQ helicases. Involvement of other proteins like PARP1, recombinase rad51, SWI/SNF complex has also been discussed. Since RecQ helicases play a central role in the DNA damage response following chemotherapeutic treatment, we propose that targeting these helicases can emerge as an alternative to available intervention strategies. We have also summarized the current research status of available RecQ inhibitors and siRNA based therapeutic approaches that targets RecQ helicases. In summary, our review gives an overview of the DNA damage responses involving replication fork reversal and provides new directions for the development of more efficient and sustainable chemotherapeutic approaches.
Collapse
Affiliation(s)
- Chetan K Jain
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Swagata Mukhopadhyay
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Agneyo Ganguly
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| |
Collapse
|
23
|
Aktas BY, Guner G, Guven DC, Arslan C, Dizdar O. Exploiting DNA repair defects in breast cancer: from chemotherapy to immunotherapy. Expert Rev Anticancer Ther 2019; 19:589-601. [PMID: 31181965 DOI: 10.1080/14737140.2019.1631162] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Introduction: Impaired DNA damage response (DDR) and subsequent genomic instability are associated with the carcinogenic process itself, but it also results in sensitivity of tumor cells to certain drugs and can be exploited to treat cancer by inducing deadly mutations or mitotic catastrophe. Exploiting DDR defects in breast cancer cells has been one of the main strategies in both conventional chemotherapy, targeted therapies, or immunotherapies. Areas covered: In this review, the authors first discuss DDR mechanisms in healthy cells and DDR defects in breast cancer, then focus on current therapies and developments in the treatment of DDR-deficient breast cancer. Expert opinion: Among conventional chemotherapeutics, platinum-based regimens, in particular, seem to be effective in DDR-deficient patients. PARP inhibitors represent one of the successful models of translational research in this area and clinical data showed high efficacy and reasonable toxicity with these agents in patients with breast cancer and BRCA mutation. Recent studies have underlined that some subtypes of breast cancer are highly immunogenic. Promising activity has been shown with immunotherapeutic agents, particularly in DDR-deficient breast cancers. Chemotherapeutics, DNA-repair pathway inhibitors, and immunotherapies might result in further improved outcomes in certain subsets of patients with breast cancer and DDR.
Collapse
Affiliation(s)
- Burak Yasin Aktas
- a Department of Medical Oncology , Hacettepe University Cancer Institute , Ankara , Turkey
| | - Gurkan Guner
- a Department of Medical Oncology , Hacettepe University Cancer Institute , Ankara , Turkey
| | - Deniz Can Guven
- a Department of Medical Oncology , Hacettepe University Cancer Institute , Ankara , Turkey
| | - Cagatay Arslan
- b Bahcesehir University , Faculty of Medicine, Department of Internal Medicine and Medical Oncology , Istanbul , Turkey
| | - Omer Dizdar
- a Department of Medical Oncology , Hacettepe University Cancer Institute , Ankara , Turkey
| |
Collapse
|
24
|
Suppression of colorectal cancer cell growth by combined treatment of 6-gingerol and γ-tocotrienol via alteration of multiple signalling pathways. J Nat Med 2019; 73:745-760. [DOI: 10.1007/s11418-019-01323-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 05/20/2019] [Indexed: 12/26/2022]
|
25
|
Baldwin P, Ohman AW, Medina JE, McCarthy ET, Dinulescu DM, Sridhar S. Nanoformulation of Talazoparib Delays Tumor Progression and Ascites Formation in a Late Stage Cancer Model. Front Oncol 2019; 9:353. [PMID: 31134152 PMCID: PMC6524318 DOI: 10.3389/fonc.2019.00353] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 04/17/2019] [Indexed: 01/01/2023] Open
Abstract
Talazoparib, a potent PARP inhibitor, induces synthetic lethality in BRCA-deficient cancers making it an attractive candidate for ovarian cancer treatment. However, its potency lends itself to side effects associated more closely with traditional chemotherapeutics than other clinically approved PARP inhbitors. We sought to formulate Talazoparib in a nanoparticle delivery system, which allows the drug to be administered intraperitoneally. This was done to specifically target peritoneal dissemination of late stage metastatic ovarian cancer and increase talazoparib's therapeutic efficacy while minimizing toxic side effects. NanoTalazoparib was developed and characterized with regard to its size, loading, and surface charge. Talazoparib and NanoTalazoparib were tested on a panel of murine and human BRCA cell lines and the dose response was compared to Olaparib's, the currently used PARP inhibitor. Therapeutic efficacy was tested in vivo in a Brca peritoneal cancer model that mimics late stage disseminated disease. NanoTalazoparib has a diameter of about 70 nm with a neutral surface charge and ~75% encapsulation efficiency, which slowly releases the drug over several hours. Dose response analysis indicated that the murine cell lines with conditional BRCA1/2, PTEN, and TP53 deletions had the lowest IC50s. NanoTalazoparib administered on a schedule of three doses weekly slowed disease progression and resulted in significantly less mice with ascites at the end point compared to controls. These results indicate that the slow release nanoformulation, NanoTalazoparib, effectively delivers PARP inhibitor therapy to the peritoneal cavity for disseminated cancer treatment. The ability to decrease ascites formation with the introduction of intraperitoneal NanoTalazoparib suggests this treatment may be an effective way to treat ovarian cancer-associated ascites and slow disease progression.
Collapse
Affiliation(s)
- Paige Baldwin
- Department of Bioengineering, Northeastern University, Boston, MA, United States
| | - Anders W Ohman
- Division of Women's and Perinatal Pathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Jamie E Medina
- Division of Women's and Perinatal Pathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Eric T McCarthy
- Division of Women's and Perinatal Pathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Daniela M Dinulescu
- Division of Women's and Perinatal Pathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Srinivas Sridhar
- Department of Bioengineering, Northeastern University, Boston, MA, United States.,Department of Physics, Northeastern University, Boston, MA, United States.,Division of Radiation Oncology, Harvard Medical School, Boston, MA, United States
| |
Collapse
|
26
|
Studies Towards Hypoxia-Activated Prodrugs of PARP Inhibitors. Molecules 2019; 24:molecules24081559. [PMID: 31010230 PMCID: PMC6514732 DOI: 10.3390/molecules24081559] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/16/2019] [Accepted: 04/16/2019] [Indexed: 01/21/2023] Open
Abstract
Poly(ADP-ribose)polymerase (PARP) inhibitors (PARPi) have recently been approved for the treatment of breast and ovarian tumors with defects in homologous recombination repair (HRR). Although it has been demonstrated that PARPi also sensitize HRR competent tumors to cytotoxic chemotherapies or radiotherapy, normal cell toxicity has remained an obstacle to their use in this context. Hypoxia-activated prodrugs (HAPs) provide a means to limit exposure of normal cells to active drug, thus adding a layer of tumor selectivity. We have investigated potential HAPs of model PARPi in which we attach a bioreducible “trigger” to the amide nitrogen, thereby blocking key binding interactions. A representative example showed promise in abrogating PARPi enzymatic activity in a biochemical assay, with a ca. 160-fold higher potency of benzyl phthalazinone 4 than the corresponding model HAP 5, but these N-alkylated compounds did not release the PARPi upon one-electron reduction by radiolysis. Therefore, we extended our investigation to include NU1025, a PARPi that contains a phenol distal to the core binding motif. The resulting 2-nitroimidazolyl ether provided modest abrogation of PARPi activity with a ca. seven-fold decrease in potency, but released the PARPi efficiently upon reduction. This investigation of potential prodrug approaches for PARPi has identified a useful prodrug strategy for future exploration.
Collapse
|
27
|
Chen DL. PET Imaging of PARP Expression Using 18F-Olaparib. J Nucl Med 2019; 60:502-503. [DOI: 10.2967/jnumed.118.219733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Accepted: 12/14/2018] [Indexed: 11/16/2022] Open
|
28
|
Caleca L, Colombo M, van Overeem Hansen T, Lázaro C, Manoukian S, Parsons MT, Spurdle AB, Radice P. GFP-Fragment Reassembly Screens for the Functional Characterization of Variants of Uncertain Significance in Protein Interaction Domains of the BRCA1 and BRCA2 Genes. Cancers (Basel) 2019; 11:E151. [PMID: 30696104 PMCID: PMC6406614 DOI: 10.3390/cancers11020151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 01/22/2019] [Indexed: 01/14/2023] Open
Abstract
Genetic testing for BRCA1 and BRCA2 genes has led to the identification of many unique variants of uncertain significance (VUS). Multifactorial likelihood models that predict the odds ratio for VUS in favor or against cancer causality, have been developed, but their use is conditioned by the amount of necessary data, which are difficult to obtain if a variant is rare. As an alternative, variants mapping to the coding regions can be examined using in vitro functional assays. BRCA1 and BRCA2 proteins promote genome protection by interacting with different proteins. In this study, we assessed the functional effect of two sets of variants in BRCA genes by exploiting the green fluorescent protein (GFP)-reassembly in vitro assay, which was set-up to test the BRCA1/BARD1, BRCA1/UbcH5a, and BRCA2/DSS1 interactions. Based on the findings observed for the validation panels of previously classified variants, BRCA1/UbcH5a and BRCA2/DSS1 binding assays showed 100% sensitivity and specificity in identifying pathogenic and non-pathogenic variants. While the actual efficiency of these assays in assessing the clinical significance of BRCA VUS has to be verified using larger validation panels, our results suggest that the GFP-reassembly assay is a robust method to identify variants affecting normal protein functioning and contributes to the classification of VUS.
Collapse
Affiliation(s)
- Laura Caleca
- Unit of Molecular Bases of Genetic Risk and Genetic Testing, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy.
| | - Mara Colombo
- Unit of Molecular Bases of Genetic Risk and Genetic Testing, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy.
| | - Thomas van Overeem Hansen
- Center for Genomic Medicine, Copenhagen University Hospital, Rigshospitalet, 2100 Copenhagen, Denmark.
- Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, 2100 Copenhagen, Denmark.
| | - Conxi Lázaro
- Hereditary Cancer Program, Catalan Institute of Oncology. Program in Molecular Mechanisms and Experimental Therapy in Oncology (Oncobell), IDIBELL, Hospitalet de Llobregat, 08900 Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain.
| | - Siranoush Manoukian
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy.
| | - Michael T Parsons
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane 4029, Australia.
| | - Amanda B Spurdle
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane 4029, Australia.
| | - Paolo Radice
- Unit of Molecular Bases of Genetic Risk and Genetic Testing, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy.
| |
Collapse
|
29
|
Mullen MM, Kuroki LM, Thaker PH. Novel treatment options in platinum-sensitive recurrent ovarian cancer: A review. Gynecol Oncol 2018; 152:416-425. [PMID: 30409489 DOI: 10.1016/j.ygyno.2018.10.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 10/18/2018] [Accepted: 10/20/2018] [Indexed: 11/26/2022]
Abstract
Epithelial ovarian cancer (EOC) is the leading cause of death due to gynecologic malignancy. The majority of advanced stage EOC patients, even those who respond well to frontline therapy, will ultimately recur and succumb to their disease. In platinum-sensitive EOC patients, or those who recur ≥6 months from initial diagnosis, treatment of recurrent disease has traditionally consisted of repeat platinum-based chemotherapy. Secondary cytoreduction remains controversial. Due to recent advances in molecularly targeted treatment options, outcomes for advanced stage EOC patients are significantly improving and hold great promise. This review discusses pivotal trials establishing platinum-based combination chemotherapy as the standard of care and addresses the utility of increasing a patient's platinum-free interval. It then discusses the role of anti-angiogenesis therapeutics, specifically bevacizumab, cediranib, and trebananib and their side effects. Lastly, it reviews key trials for the three poly-adenosine diphosphate [ADP]-ribose polymerases (PARP) inhibitors that have been FDA-approved for maintenance therapy in platinum-sensitive recurrent EOC: olaparib, rucaparib, and niraparib. This review concludes with a discussion regarding ongoing and future clinical trials.
Collapse
Affiliation(s)
- Mary M Mullen
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Washington University School of Medicine, Alvin J. Siteman Cancer Center, St Louis, MO, United States of America
| | - Lindsay M Kuroki
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Washington University School of Medicine, Alvin J. Siteman Cancer Center, St Louis, MO, United States of America
| | - Premal H Thaker
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Washington University School of Medicine, Alvin J. Siteman Cancer Center, St Louis, MO, United States of America.
| |
Collapse
|
30
|
Gogola E, Duarte AA, de Ruiter JR, Wiegant WW, Schmid JA, de Bruijn R, James DI, Guerrero Llobet S, Vis DJ, Annunziato S, van den Broek B, Barazas M, Kersbergen A, van de Ven M, Tarsounas M, Ogilvie DJ, van Vugt M, Wessels LFA, Bartkova J, Gromova I, Andújar-Sánchez M, Bartek J, Lopes M, van Attikum H, Borst P, Jonkers J, Rottenberg S. Selective Loss of PARG Restores PARylation and Counteracts PARP Inhibitor-Mediated Synthetic Lethality. Cancer Cell 2018; 33:1078-1093.e12. [PMID: 29894693 DOI: 10.1016/j.ccell.2018.05.008] [Citation(s) in RCA: 209] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 03/27/2018] [Accepted: 05/14/2018] [Indexed: 02/04/2023]
Abstract
Inhibitors of poly(ADP-ribose) (PAR) polymerase (PARPi) have recently entered the clinic for the treatment of homologous recombination (HR)-deficient cancers. Despite the success of this approach, drug resistance is a clinical hurdle, and we poorly understand how cancer cells escape the deadly effects of PARPi without restoring the HR pathway. By combining genetic screens with multi-omics analysis of matched PARPi-sensitive and -resistant Brca2-mutated mouse mammary tumors, we identified loss of PAR glycohydrolase (PARG) as a major resistance mechanism. We also found the presence of PARG-negative clones in a subset of human serous ovarian and triple-negative breast cancers. PARG depletion restores PAR formation and partially rescues PARP1 signaling. Importantly, PARG inactivation exposes vulnerabilities that can be exploited therapeutically.
Collapse
Affiliation(s)
- Ewa Gogola
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Alexandra A Duarte
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Julian R de Ruiter
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Division of Molecular Carcinogenesis, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Wouter W Wiegant
- Department of Human Genetics, Leiden University Medical Center, Leiden 2333 ZC, the Netherlands
| | - Jonas A Schmid
- Institute of Molecular Cancer Research, University of Zurich, Zurich CH-8057, Switzerland
| | - Roebi de Bruijn
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Division of Molecular Carcinogenesis, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Dominic I James
- Drug Discovery Unit, Cancer Research UK Manchester Institute, University of Manchester, Manchester M20 4BX, UK
| | - Sergi Guerrero Llobet
- Department of Medical Oncology, University Medical Center Groningen, University of Groningen, Groningen 9723GZ, the Netherlands
| | - Daniel J Vis
- Division of Molecular Carcinogenesis, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Stefano Annunziato
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Bram van den Broek
- Division of Cell Biology and BioImaging Facility, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands
| | - Marco Barazas
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Ariena Kersbergen
- Division of Molecular Oncology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands
| | - Marieke van de Ven
- Mouse Clinic for Cancer and Aging (MCCA), Preclinical Intervention Unit, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands
| | - Madalena Tarsounas
- CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Donald J Ogilvie
- Drug Discovery Unit, Cancer Research UK Manchester Institute, University of Manchester, Manchester M20 4BX, UK
| | - Marcel van Vugt
- Department of Medical Oncology, University Medical Center Groningen, University of Groningen, Groningen 9723GZ, the Netherlands
| | - Lodewyk F A Wessels
- Division of Molecular Carcinogenesis, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands
| | - Jirina Bartkova
- Danish Cancer Society Research Center, Copenhagen 2100, Denmark; Karolinska Institute, Department of Medical Biochemistry and Biophysics, Division of Genome Biology, Science for Life Laboratory, Stockholm 171 77, Sweden
| | - Irina Gromova
- Danish Cancer Society Research Center, Copenhagen 2100, Denmark
| | - Miguel Andújar-Sánchez
- Pathology Department, Complejo Hospt. Univ. Insular Materno Infantil, Las Palmas, Gran Canaria, Spain
| | - Jiri Bartek
- Danish Cancer Society Research Center, Copenhagen 2100, Denmark; Karolinska Institute, Department of Medical Biochemistry and Biophysics, Division of Genome Biology, Science for Life Laboratory, Stockholm 171 77, Sweden
| | - Massimo Lopes
- Institute of Molecular Cancer Research, University of Zurich, Zurich CH-8057, Switzerland
| | - Haico van Attikum
- Department of Human Genetics, Leiden University Medical Center, Leiden 2333 ZC, the Netherlands
| | - Piet Borst
- Division of Molecular Oncology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands
| | - Jos Jonkers
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Cancer Genomics Netherlands, Oncode Institute, Amsterdam 1066CX, the Netherlands.
| | - Sven Rottenberg
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam 1066CX, the Netherlands; Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern 3012, Switzerland.
| |
Collapse
|
31
|
Guney Eskiler G, Cecener G, Egeli U, Tunca B. Triple negative breast cancer: new therapeutic approaches andBRCAstatus. APMIS 2018; 126:371-379. [DOI: 10.1111/apm.12836] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 02/28/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Gamze Guney Eskiler
- Deparment of Medical Biology; Faculty of Medicine; Sakarya University; Sakarya Turkey
| | - Gulsah Cecener
- Deparment of Medical Biology; Faculty of Medicine; Uludag University; Bursa Turkey
| | - Unal Egeli
- Deparment of Medical Biology; Faculty of Medicine; Uludag University; Bursa Turkey
| | - Berrin Tunca
- Deparment of Medical Biology; Faculty of Medicine; Uludag University; Bursa Turkey
| |
Collapse
|
32
|
The effect of food on the pharmacokinetics of niraparib, a poly(ADP-ribose) polymerase (PARP) inhibitor, in patients with recurrent ovarian cancer. Cancer Chemother Pharmacol 2018; 81:497-503. [PMID: 29322231 DOI: 10.1007/s00280-017-3512-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 12/27/2017] [Indexed: 01/01/2023]
Abstract
PURPOSE Niraparib is a highly selective inhibitor of PARP-1 and PARP-2 approved in the United States for maintenance treatment of adult patients with recurrent ovarian cancer in complete or partial response to platinum-based chemotherapy. In this open-label crossover study, we evaluated the effects of food on niraparib pharmacokinetics (PK) and safety. METHODS Patients received a single 300-mg dose of niraparib either after a high-fat meal or under fasting conditions. After a 7-day PK assessment, all patients received a second 300-mg dose of niraparib under the opposite condition, followed by 7-day PK assessment. Blood samples for PK analyses were collected at baseline (on days 1 and 8) and up to 168 h post-dose. Bioequivalence between conditions was defined by the 90% confidence intervals (CIs) for area under the plasma concentration-time curve (AUC) from 0 to last measurable concentration (AUC0-last) and from 0 to infinity (AUC0-∞) being within the 80-125% range. RESULTS The high-fat meal/fasting ratios of geometric least-squares means for AUC0-last and AUC0-∞ were 106.8 (90% CI 97.8-116.6) and 110.1 (90% CI 99.7-121.6), respectively, indicating bioequivalence between conditions. Mean half-life, maximum plasma concentration (Cmax), and time to Cmax after the high-fat meal were similar to, 27% smaller than, and 128% greater than after fasting, respectively. Adverse events were similar between conditions. CONCLUSIONS A high-fat meal did not impact the PK profile of niraparib, indicating that niraparib can be taken with or without food. Niraparib was safe and well-tolerated.
Collapse
|
33
|
Hoskins PJ, Gotlieb WH. Missed therapeutic and prevention opportunities in women with BRCA-mutated epithelial ovarian cancer and their families due to low referral rates for genetic counseling and BRCA testing: A review of the literature. CA Cancer J Clin 2017; 67:493-506. [PMID: 28881380 DOI: 10.3322/caac.21408] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 12/24/2022] Open
Abstract
Answer questions and earn CME/CNE Fifteen percent of women with epithelial ovarian cancer have inherited mutations in the BRCA breast cancer susceptibility genes. Knowledge of her BRCA status has value both for the woman and for her family. A therapeutic benefit exists for the woman with cancer, because a new family of oral drugs, the poly ADP-ribose polymerase (PARP) inhibitors, has recently been approved, and these drugs have the greatest efficacy in women who carry the mutation. For her family, there is the potential to prevent ovarian cancer in those carrying the mutation by using risk-reducing surgery. Such surgery significantly reduces the chance of developing this, for the most part, incurable cancer. Despite these potential benefits, referral rates for genetic counseling and subsequent BRCA testing are low, ranging from 10% to 30%, indicating that these therapeutic and prevention opportunities are being missed. The authors have reviewed the relevant available literature. Topics discussed are BRCA and its relation to ovarian cancer, the rates of referral for genetic counseling/BRCA testing, reasons for these low rates, potential strategies to improve on those rates, lack of effectiveness of current screening strategies, the pros and cons of risk-reducing surgery, other prevention options, and the role and value of PARP inhibitors. CA Cancer J Clin 2017;67:493-506. © 2017 American Cancer Society.
Collapse
Affiliation(s)
- Paul J Hoskins
- Medical Oncologist and Past President, Society of Gynecologic Oncology Canada, British Columbia Cancer Agency, Vancouver Center, BC, Canada
| | - Walter H Gotlieb
- Gynecologic Oncologist and President, Society of Gynecologic Oncology Canada, McGill University, Jewish General Hospital, Montreal, QC, Canada
| |
Collapse
|
34
|
Belz JE, Kumar R, Baldwin P, Ojo NC, Leal AS, Royce DB, Zhang D, van de Ven AL, Liby KT, Sridhar S. Sustained Release Talazoparib Implants for Localized Treatment of BRCA1-deficient Breast Cancer. Am J Cancer Res 2017; 7:4340-4349. [PMID: 29158830 PMCID: PMC5695017 DOI: 10.7150/thno.18563] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 06/17/2017] [Indexed: 01/17/2023] Open
Abstract
Talazoparib, a potent PARP inhibitor, has shown promising clinical and pre-clinical activity by inducing synthetic lethality in cancers with germline Brca1/2 mutations. Conventional oral delivery of Talazoparib is associated with significant off-target effects, therefore we sought to develop new delivery systems in the form of an implant loaded with Talazoparib for localized, slow and sustained release of the drug at the tumor site in Brca1-deficient breast cancer. Poly(lactic-co-glycolic acid) (PLGA) implants (0.8 mm diameter) loaded with subclinical dose (25 or 50 µg) Talazoparib were fabricated and characterized. In vitro studies with Brca1-deficient W780 and W0069 breast cancer cells were conducted to test sensitivity to PARP inhibition. The in vivo therapeutic efficacy of Talazoparib implants was assessed following a one-time intratumoral injection in Brca1Co/Co;MMTV-Cre;p53+/- mice and compared to drug-free implants and oral gavage. Immunohistochemistry studies were performed on tumor sections using PCNA and γ-H2AX staining. Sustained release of Talazoparib was observed over 28 days in vitro. Mice treated with Talazoparib implants showed statistically significant tumor growth inhibition compared to those receiving drug-free implants or free Talazoparib orally. Talazoparib implants were well-tolerated at both drug doses and resulted in less weight loss than oral gavage. PARP inhibition in mice treated with Talazoparib implants significantly increased double-stranded DNA damage and decreased tumor cell proliferation as shown by PCNA and γ-H2AX staining as compared to controls. These results demonstrate that localized and sustained delivery of Talazoparib via implants has potential to provide superior treatment outcomes at sub-clinical doses with minimal toxicity in patients with BRCA1 deficient tumors.
Collapse
|
35
|
Vanderstichele A, Busschaert P, Olbrecht S, Lambrechts D, Vergote I. Genomic signatures as predictive biomarkers of homologous recombination deficiency in ovarian cancer. Eur J Cancer 2017; 86:5-14. [PMID: 28950147 DOI: 10.1016/j.ejca.2017.08.029] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 08/24/2017] [Indexed: 12/22/2022]
Abstract
DNA repair deficiency is a common hallmark of many cancers and is increasingly recognised as a target for cancer therapeutics. Selecting patients for these treatments requires a functional assessment of multiple redundant DNA repair pathways. With the advent of whole-genome sequencing of cancer genomes, it is increasingly recognised that multiple signatures of mutational and chromosomal alterations can be correlated with specific DNA repair defects. The clinical relevance of this approach is underlined by the use of poly-(ADP-ribose) polymerase inhibitors (PARPi) in homologous recombination (HR) deficient high-grade serous ovarian cancers. Beyond deleterious mutations in HR-related genes such as BRCA1/2, it is recognised that HR deficiency endows ovarian cancers with specific signatures of base substitutions and structural chromosomal variation. Multiple metrics quantifying loss-of-heterozygosity (LOH) events were proposed and implemented in trials with PARPi. However, it was shown that some of the HR-deficient cases, i.e. CDK12-mutated tumours, were not associated with high LOH-based scores, but with distinct patterns of genomic alterations such as tandem duplication. Therefore, more complex signatures of structural genomic variation were identified and quantified. Ultimately, optimal prediction models for treatments targeting DNA repair will need to integrate multiples of these genomic signatures and will also need to assess multiple resistance mechanisms such as genomic reversion events that partially or fully re-activate DNA repair.
Collapse
Affiliation(s)
- Adriaan Vanderstichele
- Department of Gynaecology and Obstetrics, University Hospitals Leuven, Belgium; Division of Gynaecological Oncology, Leuven Cancer Institute, KU Leuven, Leuven, Belgium.
| | - Pieter Busschaert
- Department of Gynaecology and Obstetrics, University Hospitals Leuven, Belgium; Division of Gynaecological Oncology, Leuven Cancer Institute, KU Leuven, Leuven, Belgium
| | - Siel Olbrecht
- Department of Gynaecology and Obstetrics, University Hospitals Leuven, Belgium; Division of Gynaecological Oncology, Leuven Cancer Institute, KU Leuven, Leuven, Belgium
| | - Diether Lambrechts
- Center for Cancer Biology, VIB, Leuven, Belgium; Laboratory for Translational Genetics, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Ignace Vergote
- Department of Gynaecology and Obstetrics, University Hospitals Leuven, Belgium; Division of Gynaecological Oncology, Leuven Cancer Institute, KU Leuven, Leuven, Belgium
| |
Collapse
|
36
|
Hengel SR, Spies MA, Spies M. Small-Molecule Inhibitors Targeting DNA Repair and DNA Repair Deficiency in Research and Cancer Therapy. Cell Chem Biol 2017; 24:1101-1119. [PMID: 28938088 PMCID: PMC5679738 DOI: 10.1016/j.chembiol.2017.08.027] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 08/11/2017] [Accepted: 08/30/2017] [Indexed: 01/13/2023]
Abstract
To maintain stable genomes and to avoid cancer and aging, cells need to repair a multitude of deleterious DNA lesions, which arise constantly in every cell. Processes that support genome integrity in normal cells, however, allow cancer cells to develop resistance to radiation and DNA-damaging chemotherapeutics. Chemical inhibition of the key DNA repair proteins and pharmacologically induced synthetic lethality have become instrumental in both dissecting the complex DNA repair networks and as promising anticancer agents. The difficulty in capitalizing on synthetically lethal interactions in cancer cells is that many potential targets do not possess well-defined small-molecule binding determinates. In this review, we discuss several successful campaigns to identify and leverage small-molecule inhibitors of the DNA repair proteins, from PARP1, a paradigm case for clinically successful small-molecule inhibitors, to coveted new targets, such as RAD51 recombinase, RAD52 DNA repair protein, MRE11 nuclease, and WRN DNA helicase.
Collapse
Affiliation(s)
- Sarah R Hengel
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA
| | - M Ashley Spies
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA; Department of Pharmaceutical Sciences and Experimental Therapeutics, Division of Medicinal and Natural Products Chemistry, University of Iowa, Iowa City, IA 52242, USA.
| | - Maria Spies
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA.
| |
Collapse
|
37
|
Garcia TB, Snedeker JC, Baturin D, Gardner L, Fosmire SP, Zhou C, Jordan CT, Venkataraman S, Vibhakar R, Porter CC. A Small-Molecule Inhibitor of WEE1, AZD1775, Synergizes with Olaparib by Impairing Homologous Recombination and Enhancing DNA Damage and Apoptosis in Acute Leukemia. Mol Cancer Ther 2017; 16:2058-2068. [PMID: 28655785 DOI: 10.1158/1535-7163.mct-16-0660] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 05/22/2017] [Accepted: 06/16/2017] [Indexed: 01/01/2023]
Abstract
Although some patients with acute leukemia have good prognoses, the prognosis of adult and pediatric patients who relapse or cannot tolerate standard chemotherapy is poor. Inhibition of WEE1 with AZD1775 has been shown to sensitize cancer cells to genotoxic chemotherapies, including cytarabine in acute myeloid leukemia (AML) and T-ALL. Inhibition of WEE1 impairs homologous recombination by indirectly inhibiting BRCA2. Thus, we sought to determine whether AZD1775 could sensitize cells to the PARP1/2 inhibitor olaparib. We found that combined treatment with AZD1775 and olaparib was synergistic in AML and ALL cells, and this combination impaired proliferative capacity upon drug withdrawal. AZD1775 impaired homologous recombination in olaparib-treated cells, resulting in enhanced DNA damage accumulation and apoptosis induction. This combination enhanced disease control and increased survival in a murine AML model. Furthermore, we demonstrated that combined treatment with AZD1775 and olaparib reduces proliferation and colony formation and increases apoptosis in AML patient samples. In aggregate, these studies raise the possibility of rational combinations of targeted agents for leukemia in patients for whom conventional chemotherapeutics may not be effective or well tolerated. Mol Cancer Ther; 16(10); 2058-68. ©2017 AACR.
Collapse
Affiliation(s)
- Tamara B Garcia
- Medical Scientist Training Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Jonathan C Snedeker
- Department of Pediatrics Summer Internship Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Dmitry Baturin
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Lori Gardner
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Susan P Fosmire
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Chengjing Zhou
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia
| | - Craig T Jordan
- Division of Hematology, University of Colorado, Aurora, Colorado
| | - Sujatha Venkataraman
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Rajeev Vibhakar
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Christopher C Porter
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado. .,Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia
| |
Collapse
|
38
|
A germline FANCA alteration that is associated with increased sensitivity to DNA damaging agents. Cold Spring Harb Mol Case Stud 2017; 3:mcs.a001487. [PMID: 28864460 PMCID: PMC5593159 DOI: 10.1101/mcs.a001487] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 04/27/2017] [Indexed: 12/26/2022] Open
Abstract
Defects in genes involved in DNA damage repair (DDR) pathway are emerging as novel biomarkers and targets for new prostate cancer drug therapies. A previous report revealed an association between an exceptional response to cisplatin treatment and a somatic loss of heterozygosity (LOH) of FANCA in a patient with metastatic prostate cancer who also harbored a germline FANCA variant (S1088F). Although germline FANCA mutations are the most frequent alterations in patients with Fanconi anemia, germline alterations are less common in prostate cancer. We hypothesized that the germline S1088F FANCA variant in combination with FANCA LOH was deleterious for FANCA function and contributed to the patient's exceptional response to cisplatin. We show that although it properly localizes to the nucleus, the S1088F FANCA mutant protein disrupts the FANC protein complex resulting in increased sensitivity to DNA damaging agents. Because molecular stratification is emerging as a strategy for treating men with metastatic, castrate-resistant prostate cancer harboring specific DDR gene defects, our findings suggest that more biomarker studies are needed to better define clinically relevant germline and somatic alterations.
Collapse
|
39
|
Guppy BJ, McManus KJ. Synthetic lethal targeting of RNF20 through PARP1 silencing and inhibition. Cell Oncol (Dordr) 2017; 40:281-292. [PMID: 28462496 DOI: 10.1007/s13402-017-0323-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2017] [Indexed: 12/14/2022] Open
Abstract
PURPOSE The identification of novel therapeutic targets that exploit the aberrant genetics driving oncogenesis is critical to better combat cancer. RNF20 is somatically altered in numerous cancers, and its diminished expression drives genome instability, a driving factor of oncogenesis. Accordingly, we sought to determine whether PARP1 silencing and inhibition could preferentially kill RNF20-deficient cells using a synthetic lethal strategy. METHODS RNF20 and PARP1 were silenced using RNAi-based approaches. Direct synthetic lethal tests were performed by silencing RNF20 with and without PARP1 and the impact on cell numbers was evaluated using semi-quantitative imaging microscopy. Next, Olaparib and BMN673 (PARP1 inhibitors) were evaluated for their ability to induce preferential killing in RNF20 silenced cells, while real-time cell analyses were used to distinguish cell cytotoxicity from cell cycle arrest. Finally, quantitative imaging microscopy was employed to evaluate marks associated with DNA double-strand breaks (γ-H2AX) and apoptosis (cleaved Caspase-3). RESULTS We found that PARP1 silencing resulted in a decrease in number of RNF20 silenced cells relative to controls. We further found that Olaparib and BMN673 treatments also resulted in fewer RNF20 silenced cells relative to controls. Finally, we found by quantitative imaging microscopy that RNF20 silenced cells treated with BMN673 exhibited significant increases in γ-H2AX and cleaved Caspase-3, suggesting that these treatments induce DNA double-strand breaks that are not adequately repaired within RNF20-silenced cells. CONCLUSIONS Collectively, our data indicate that RNF20 and PARP1 are synthetic lethal interactors, suggesting that cancers with diminished RNF20 expression and/or function may be susceptible to PARP1 inhibitors.
Collapse
Affiliation(s)
- Brent J Guppy
- Department of Biochemistry & Medical Genetics, University of Manitoba, Winnipeg, MB, Canada.,CancerCare Manitoba, Research Institute in Oncology and Hematology, ON6010 - 675 McDermot Avenue, Winnipeg, MB, R3E 0V9, Canada
| | - Kirk J McManus
- Department of Biochemistry & Medical Genetics, University of Manitoba, Winnipeg, MB, Canada. .,CancerCare Manitoba, Research Institute in Oncology and Hematology, ON6010 - 675 McDermot Avenue, Winnipeg, MB, R3E 0V9, Canada.
| |
Collapse
|
40
|
Kim Y, Kim A, Sharip A, Sharip A, Jiang J, Yang Q, Xie Y. Reverse the Resistance to PARP Inhibitors. Int J Biol Sci 2017; 13:198-208. [PMID: 28255272 PMCID: PMC5332874 DOI: 10.7150/ijbs.17240] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 09/09/2016] [Indexed: 12/24/2022] Open
Abstract
One of the DNA repair machineries is activated by Poly (ADP-ribose) Polymerase (PARP) enzyme. Particularly, this enzyme is involved in repair of damages to single-strand DNA, thus decreasing the chances of generating double-strand breaks in the genome. Therefore, the concept to block PARP enzymes by PARP inhibitor (PARPi) was appreciated in cancer treatment. PARPi has been designed and tested for many years and became a potential supplement for the conventional chemotherapy. However, increasing evidence indicates the appearance of the resistance to this treatment. Specifically, cancer cells may acquire new mutations or events that overcome the positive effect of these drugs. This paper describes several molecular mechanisms of PARPi resistance which were reported most recently, and summarizes some strategies to reverse this type of drug resistance.
Collapse
Affiliation(s)
- Yevgeniy Kim
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Aleksei Kim
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Ainur Sharip
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Aigul Sharip
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Juhong Jiang
- Department of Pathology, the First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Qing Yang
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Yingqiu Xie
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| |
Collapse
|
41
|
Gojo I, Beumer JH, Pratz KW, McDevitt MA, Baer MR, Blackford AL, Smith BD, Gore SD, Carraway HE, Showel MM, Levis MJ, Dezern AE, Gladstone DE, Ji JJ, Wang L, Kinders RJ, Pouquet M, Ali-Walbi I, Rudek MA, Poh W, Herman JG, Karnitz LM, Kaufmann SH, Chen A, Karp JE. A Phase 1 Study of the PARP Inhibitor Veliparib in Combination with Temozolomide in Acute Myeloid Leukemia. Clin Cancer Res 2017; 23:697-706. [PMID: 27503200 PMCID: PMC5290001 DOI: 10.1158/1078-0432.ccr-16-0984] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 06/23/2016] [Accepted: 07/17/2016] [Indexed: 11/16/2022]
Abstract
PURPOSE In preclinical studies, the PARP inhibitor veliparib enhanced the antileukemic action of temozolomide through potentiation of DNA damage. Accordingly, we conducted a phase 1 study of temozolomide with escalating doses of veliparib in patients with relapsed, refractory acute myeloid leukemia (AML) or AML arising from aggressive myeloid malignancies. EXPERIMENTAL DESIGN Patients received veliparib [20-200 mg once a day on day 1 and twice daily on days 4-12 in cycle 1 (days 1-8 in cycle ≥2)] and temozolomide [150-200 mg/m2 daily on days 3-9 in cycle 1 (days 1-5 in cycle ≥2)] every 28 to 56 days. Veliparib pharmacokinetics and pharmacodynamics [ability to inhibit poly(ADP-ribose) polymer (PAR) formation and induce H2AX phosphorylation] were assessed. Pretreatment levels of MGMT and PARP1 protein, methylation of the MGMT promoter, and integrity of the Fanconi anemia pathway were also examined. RESULTS Forty-eight patients were treated at seven dose levels. Dose-limiting toxicities were oral mucositis and esophagitis lasting >7 days. The MTD was veliparib 150 mg twice daily with temozolomide 200 mg/m2 daily. The complete response (CR) rate was 17% (8/48 patients). Veliparib exposure as well as inhibition of PAR polymer formation increased dose proportionately. A veliparib-induced increase in H2AX phosphorylation in CD34+ cells was observed in responders. Three of 4 patients with MGMT promoter methylation achieved CR. CONCLUSIONS Veliparib plus temozolomide is well tolerated, with activity in advanced AML. Further evaluation of this regimen and of treatment-induced phosphorylation of H2AX and MGMT methylation as potential response predictors appears warranted. Clin Cancer Res; 23(3); 697-706. ©2016 AACR.
Collapse
Affiliation(s)
- Ivana Gojo
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland.
| | - Jan H Beumer
- Cancer Therapeutics Program, University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Keith W Pratz
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Michael A McDevitt
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Maria R Baer
- Department of Medicine, University of Maryland Greenebaum Cancer Center, Baltimore, Maryland
| | - Amanda L Blackford
- Department of Statistics, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - B Douglas Smith
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Steven D Gore
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Hetty E Carraway
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Margaret M Showel
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Mark J Levis
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Amy E Dezern
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Douglas E Gladstone
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Jiuping Jay Ji
- Laboratory of Human Toxicology and Pharmacology, Applied/Developmental Research Support Directorate, SAIC-Frederick, Inc., NCI-Frederick, Frederick, Maryland
| | - Lihua Wang
- Laboratory of Human Toxicology and Pharmacology, Applied/Developmental Research Support Directorate, SAIC-Frederick, Inc., NCI-Frederick, Frederick, Maryland
| | - Robert J Kinders
- Laboratory of Human Toxicology and Pharmacology, Applied/Developmental Research Support Directorate, SAIC-Frederick, Inc., NCI-Frederick, Frederick, Maryland
| | - Marie Pouquet
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ismail Ali-Walbi
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Michelle A Rudek
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Weijie Poh
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - James G Herman
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| | - Larry M Karnitz
- Division of Oncology Research and Department of Molecular Pharmacology, Mayo Clinic, Rochester, Minnesota
| | - Scott H Kaufmann
- Division of Oncology Research and Department of Molecular Pharmacology, Mayo Clinic, Rochester, Minnesota
| | - Alice Chen
- Cancer Therapy Evaluation Program, NCI, Rockville, Maryland
| | - Judith E Karp
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital, Baltimore, Maryland
| |
Collapse
|
42
|
Heerma van Voss MR, Brilliant JD, Vesuna F, Bol GM, van der Wall E, van Diest PJ, Raman V. Combination treatment using DDX3 and PARP inhibitors induces synthetic lethality in BRCA1-proficient breast cancer. Med Oncol 2017; 34:33. [PMID: 28138868 DOI: 10.1007/s12032-017-0889-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 01/16/2017] [Indexed: 12/20/2022]
Abstract
Triple-negative breast cancers have unfavorable outcomes due to their inherent aggressive behavior and lack of targeted therapies. Breast cancers occurring in BRCA1 mutation carriers are mostly triple-negative and harbor homologous recombination deficiency, sensitizing them to inhibition of a second DNA damage repair pathway by, e.g., PARP inhibitors. Unfortunately, resistance against PARP inhibitors in BRCA1-deficient cancers is common and sensitivity is limited in BRCA1-proficient breast cancers. RK-33, an inhibitor of the RNA helicase DDX3, was previously demonstrated to impede non-homologous end-joining repair of DNA breaks. Consequently, we evaluated DDX3 as a therapeutic target in BRCA pro- and deficient breast cancers and assessed whether DDX3 inhibition could sensitize cells to PARP inhibition. High DDX3 expression was identified by immunohistochemistry in breast cancer samples of 24% of BRCA1 (p = 0.337) and 21% of BRCA2 mutation carriers (p = 0.624), as compared to 30% of sporadic breast cancer samples. The sensitivity to the DDX3 inhibitor RK-33 was similar in BRCA1 pro- and deficient breast cancer cell lines, with IC50 values in the low micromolar range (2.8-6.6 μM). A synergistic interaction was observed for combination treatment with RK-33 and the PARP inhibitor olaparib in BRCA1-proficient breast cancer, with the mean combination index ranging from 0.59 to 0.62. Overall, we conclude that BRCA pro- and deficient breast cancers have a similar dependency upon DDX3. DDX3 inhibition by RK-33 synergizes with PARP inhibitor treatment, especially in breast cancers with a BRCA1-proficient background.
Collapse
Affiliation(s)
- Marise R Heerma van Voss
- Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA.,Department of Pathology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Justin D Brilliant
- Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Farhad Vesuna
- Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Guus M Bol
- Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA.,Department of Pathology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Elsken van der Wall
- Cancer Center, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.,Department of Oncology, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Paul J van Diest
- Department of Pathology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.,Department of Oncology, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Venu Raman
- Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA. .,Department of Pathology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands. .,Department of Oncology, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA.
| |
Collapse
|
43
|
Swisher EM, Lin KK, Oza AM, Scott CL, Giordano H, Sun J, Konecny GE, Coleman RL, Tinker AV, O'Malley DM, Kristeleit RS, Ma L, Bell-McGuinn KM, Brenton JD, Cragun JM, Oaknin A, Ray-Coquard I, Harrell MI, Mann E, Kaufmann SH, Floquet A, Leary A, Harding TC, Goble S, Maloney L, Isaacson J, Allen AR, Rolfe L, Yelensky R, Raponi M, McNeish IA. Rucaparib in relapsed, platinum-sensitive high-grade ovarian carcinoma (ARIEL2 Part 1): an international, multicentre, open-label, phase 2 trial. Lancet Oncol 2017; 18:75-87. [PMID: 27908594 DOI: 10.1016/s1470-2045(16)30559-9] [Citation(s) in RCA: 852] [Impact Index Per Article: 121.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/26/2016] [Accepted: 09/28/2016] [Indexed: 01/22/2023]
Abstract
BACKGROUND Poly(ADP-ribose) polymerase (PARP) inhibitors have activity in ovarian carcinomas with homologous recombination deficiency. Along with BRCA1 and BRCA2 (BRCA) mutations genomic loss of heterozygosity (LOH) might also represent homologous recombination deficiency. In ARIEL2, we assessed the ability of tumour genomic LOH, quantified with a next-generation sequencing assay, to predict response to rucaparib, an oral PARP inhibitor. METHODS ARIEL2 is an international, multicentre, two-part, phase 2, open-label study done at 49 hospitals and cancer centres in Australia, Canada, France, Spain, the UK, and the USA. In ARIEL2 Part 1, patients with recurrent, platinum-sensitive, high-grade ovarian carcinoma were classified into one of three predefined homologous recombination deficiency subgroups on the basis of tumour mutational analysis: BRCA mutant (deleterious germline or somatic), BRCA wild-type and LOH high (LOH high group), or BRCA wild-type and LOH low (LOH low group). We prespecified a cutoff of 14% or more genomic LOH for LOH high. Patients began treatment with oral rucaparib at 600 mg twice per day for continuous 28 day cycles until disease progression or any other reason for discontinuation. The primary endpoint was progression-free survival. All patients treated with at least one dose of rucaparib were included in the safety analyses and all treated patients who were classified were included in the primary endpoint analysis. This trial is registered with ClinicalTrials.gov, number NCT01891344. Enrolment into ARIEL2 Part 1 is complete, although an extension (Part 2) is ongoing. FINDINGS 256 patients were screened and 206 were enrolled between Oct 30, 2013, and Dec 19, 2014. At the data cutoff date (Jan 18, 2016), 204 patients had received rucaparib, with 28 patients remaining in the study. 192 patients could be classified into one of the three predefined homologous recombination deficiency subgroups: BRCA mutant (n=40), LOH high (n=82), or LOH low (n=70). Tumours from 12 patients were established as BRCA wild-type, but could not be classified for LOH, because of insufficient neoplastic nuclei in the sample. The median duration of treatment for the 204 patients was 5·7 months (IQR 2·8-10·1). 24 patients in the BRCA mutant subgroup, 56 patients in the LOH high subgroup, and 59 patients in the LOH low subgroup had disease progression or died. Median progression-free survival after rucaparib treatment was 12·8 months (95% CI 9·0-14·7) in the BRCA mutant subgroup, 5·7 months (5·3-7·6) in the LOH high subgroup, and 5·2 months (3·6-5·5) in the LOH low subgroup. Progression-free survival was significantly longer in the BRCA mutant (hazard ratio 0·27, 95% CI 0·16-0·44, p<0·0001) and LOH high (0·62, 0·42-0·90, p=0·011) subgroups compared with the LOH low subgroup. The most common grade 3 or worse treatment-emergent adverse events were anaemia or decreased haemoglobin (45 [22%] patients), and elevations in alanine aminotransferase or aspartate aminotransferase (25 [12%]). Common serious adverse events included small intestinal obstruction (10 [5%] of 204 patients), malignant neoplasm progression (10 [5%]), and anaemia (nine [4%]). Three patients died during the study (two because of disease progression and one because of sepsis and disease progression). No treatment-related deaths occurred. INTERPRETATION In patients with BRCA mutant or BRCA wild-type and LOH high platinum-sensitive ovarian carcinomas treated with rucaparib, progression-free survival was longer than in patients with BRCA wild-type LOH low carcinomas. Our results suggest that assessment of tumour LOH can be used to identify patients with BRCA wild-type platinum-sensitive ovarian cancers who might benefit from rucaparib. These results extend the potential usefulness of PARP inhibitors in the treatment setting beyond BRCA mutant tumours. FUNDING Clovis Oncology, US Department of Defense Ovarian Cancer Research Program, Stand Up To Cancer-Ovarian Cancer Research Fund Alliance-National Ovarian Cancer Coalition Dream Team Translational Research Grant, and V Foundation Translational Award.
Collapse
Affiliation(s)
| | | | - Amit M Oza
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | | | | | - James Sun
- Foundation Medicine, Cambridge, MA, USA
| | | | - Robert L Coleman
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Anna V Tinker
- British Columbia Cancer Agency, Vancouver, BC, Canada
| | - David M O'Malley
- The Ohio State University, James Cancer Center, Columbus, OH, USA
| | | | - Ling Ma
- Rocky Mountain Cancer Centers, Lakewood, CO, USA
| | | | - James D Brenton
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK
| | | | - Ana Oaknin
- Vall d'Hebron University Hospital, Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | | | | | | | | | | | - Alexandra Leary
- Gustave Roussy Cancer Center and INSERM U981, Villejuif, France
| | | | | | | | | | | | | | | | | | - Iain A McNeish
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| |
Collapse
|
44
|
Lohse I, Kumareswaran R, Cao P, Pitcher B, Gallinger S, Bristow RG, Hedley DW. Effects of Combined Treatment with Ionizing Radiation and the PARP Inhibitor Olaparib in BRCA Mutant and Wild Type Patient-Derived Pancreatic Cancer Xenografts. PLoS One 2016; 11:e0167272. [PMID: 28033382 PMCID: PMC5199060 DOI: 10.1371/journal.pone.0167272] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 10/28/2016] [Indexed: 02/07/2023] Open
Abstract
Background The BRCA2 gene product plays an important role in DNA double strand break repair. Therefore, we asked whether radiation sensitivity of pancreatic cancers developing in individuals with germline BRCA2 mutations can be enhanced by agents that inhibit poly (ADP-ribose) polymerase (PARP). Methods We compared the sensitivity of two patient-derived pancreatic cancer xenografts, expressing a truncated or wild type BRCA 2, to ionizing radiation alone or in combination with olaparib (AZD-2281). Animals were treated with either a single dose of 12Gy, 7 days of olaparib or 7 days of olaparib followed by a single dose of 12Gy. Response was assessed by tumour growth delay and the activation of damage response pathways. Results The BRCA2 mutated and wild type tumours showed similar radiation sensitivity, and treatment with olaparib did not further sensitize either model when compared to IR alone. Conclusions While PARP inhibition has been shown to be effective in BRCA-mutated breast and ovarian cancers, it is less well established in pancreatic cancer patients. Our results show no radiosensitization in a germline BRCA 2 mutant and suggest that combining PARP inhibition and IR may not be beneficial in BRCA 2 related pancreatic tumors.
Collapse
Affiliation(s)
- Ines Lohse
- Ontario Cancer Institute and Campbell Family Cancer Research Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Ramya Kumareswaran
- Ontario Cancer Institute and Campbell Family Cancer Research Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Pinjiang Cao
- Ontario Cancer Institute and Campbell Family Cancer Research Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Bethany Pitcher
- Ontario Cancer Institute and Campbell Family Cancer Research Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Steven Gallinger
- Mount Sinai Hospital, Joseph and Wolf Lebovic Health Complex, Toronto, Ontario, Canada
- Translational Research Initiative in Pancreas Cancer, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Robert G. Bristow
- Ontario Cancer Institute and Campbell Family Cancer Research Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - David W. Hedley
- Ontario Cancer Institute and Campbell Family Cancer Research Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Department of Medical Oncology and Haematology, Princess Margaret Cancer Center, Toronto, Ontario, Canada
- * E-mail:
| |
Collapse
|
45
|
Konecny GE, Kristeleit RS. PARP inhibitors for BRCA1/2-mutated and sporadic ovarian cancer: current practice and future directions. Br J Cancer 2016; 115:1157-1173. [PMID: 27736844 PMCID: PMC5104889 DOI: 10.1038/bjc.2016.311] [Citation(s) in RCA: 147] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 08/02/2016] [Accepted: 09/01/2016] [Indexed: 12/12/2022] Open
Abstract
Poly(ADP-ribose) polymerase (PARP) inhibitors cause targeted tumour cell death in homologous recombination (HR)-deficient cancers, including BRCA-mutated tumours, by exploiting synthetic lethality. PARP inhibitors are being evaluated in late-stage clinical trials of ovarian cancer (OC). Recently, olaparib was the first PARP inhibitor approved in the European Union and United States for the treatment of advanced BRCA-mutated OC. This paper reviews the role of BRCA mutations for tumorigenesis and PARP inhibitor sensitivity, and summarises the clinical development of PARP inhibitors for the treatment of patients diagnosed with OC. Among the five key PARP inhibitors currently in clinical development, olaparib has undergone the most extensive clinical investigation. PARP inhibitors have demonstrated durable antitumour activity in BRCA-mutated advanced OC as a single agent in the treatment and maintenance setting, particularly in platinum-sensitive disease. PARP inhibitors are well tolerated; however, further careful assessment of moderate and late-onset toxicity is mandatory in the maintenance and adjuvant setting, respectively. PARP inhibitors are also being evaluated in combination with chemotherapeutic and novel targeted agents to potentiate antitumour activities. Current research is extending the use of PARP inhibitors beyond BRCA mutations to other sensitising molecular defects that result in HR-deficient cancer, and is defining an HR-deficiency signature. Trials are underway to determine whether such a signature will predict sensitivity to PARP inhibitors in women with sporadic OC.
Collapse
Affiliation(s)
- G E Konecny
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, 2825 Santa Monica Blvd., Suite 200, Santa Monica, CA 90404–2429, USA
| | - R S Kristeleit
- Department of Oncology, University College London Cancer Institute, University College London, Paul Gorman Building, Huntley Street, London, WC1E 6BT, UK
| |
Collapse
|
46
|
Zhao L, So CWE. PARP-inhibitor-induced synthetic lethality for acute myeloid leukemia treatment. Exp Hematol 2016; 44:902-7. [PMID: 27473567 DOI: 10.1016/j.exphem.2016.07.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/13/2016] [Accepted: 07/17/2016] [Indexed: 10/21/2022]
Abstract
Genomic instability is one of the most common and critical characteristics of cancer cells. The combined effect of replication stress and DNA damage repair defects associated with various oncogenic events drives genomic instability and disease progression. However, these DNA repair defects found in cancer cells can also provide unique therapeutic opportunities and form the basis of synthetic lethal targeting of solid tumors carrying BRCA mutations. Although the idea of utilizing synthetic lethality as a therapy strategy has been gaining momentum in various solid tumors, its application in leukemia still largely lags behind. In this article, we review recent advances in understanding the roles of the DNA damage response in acute myeloid leukemia and examine the potential therapeutic avenues of using poly (ADP-ribose) polymerase (PARP) inhibitors in AML treatment.
Collapse
MESH Headings
- Animals
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Cell Transformation, Neoplastic/genetics
- Clinical Trials as Topic
- DNA Damage
- Drug Resistance, Neoplasm
- Gene Expression Regulation, Leukemic/drug effects
- Genomic Instability
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Oxidative Stress/drug effects
- PTEN Phosphohydrolase/metabolism
- Poly(ADP-ribose) Polymerase Inhibitors/pharmacology
- Poly(ADP-ribose) Polymerase Inhibitors/therapeutic use
- Signal Transduction/drug effects
- Synthetic Lethal Mutations/drug effects
- Transcription, Genetic
Collapse
Affiliation(s)
- Lu Zhao
- Leukaemia and Stem Cell Biology Group. Department of Haematological Medicine, King's College London, London, UK
| | - Chi Wai Eric So
- Leukaemia and Stem Cell Biology Group. Department of Haematological Medicine, King's College London, London, UK.
| |
Collapse
|
47
|
McGonigle S, Chen Z, Wu J, Chang P, Kolber-Simonds D, Ackermann K, Twine NC, Shie JL, Miu JT, Huang KC, Moniz GA, Nomoto K. E7449: A dual inhibitor of PARP1/2 and tankyrase1/2 inhibits growth of DNA repair deficient tumors and antagonizes Wnt signaling. Oncotarget 2016; 6:41307-23. [PMID: 26513298 PMCID: PMC4747407 DOI: 10.18632/oncotarget.5846] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 09/22/2015] [Indexed: 11/25/2022] Open
Abstract
Inhibition of Poly(ADP-ribose) Polymerase1 (PARP1) impairs DNA damage repair, and early generation PARP1/2 inhibitors (olaparib, niraparib, etc.) have demonstrated clinical proof of concept for cancer treatment. Here, we describe the development of the novel PARP inhibitor E7449, a potent PARP1/2 inhibitor that also inhibits PARP5a/5b, otherwise known as tankyrase1 and 2 (TNKS1 and 2), important regulators of canonical Wnt/β-catenin signaling. E7449 inhibits PARP enzymatic activity and additionally traps PARP1 onto damaged DNA; a mechanism previously shown to augment cytotoxicity. Cells deficient in DNA repair pathways beyond homologous recombination were sensitive to E7449 treatment. Chemotherapy was potentiated by E7449 and single agent had significant antitumor activity in BRCA-deficient xenografts. Additionally, E7449 inhibited Wnt/β-catenin signaling in colon cancer cell lines, likely through TNKS inhibition. Consistent with this possibility, E7449 stabilized axin and TNKS proteins resulting in β-catenin de-stabilization and significantly altered expression of Wnt target genes. Notably, hair growth mediated by Wnt signaling was inhibited by E7449. A pharmacodynamic effect of E7449 on Wnt target genes was observed in tumors, although E7449 lacked single agent antitumor activity in vivo, a finding typical for selective TNKS inhibitors. E7449 antitumor activity was increased through combination with MEK inhibition. Particularly noteworthy was the lack of toxicity, most significantly the lack of intestinal toxicity reported for other TNKS inhibitors. E7449 represents a novel dual PARP1/2 and TNKS1/2 inhibitor which has the advantage of targeting Wnt/β-catenin signaling addicted tumors. E7449 is currently in early clinical development.
Collapse
Affiliation(s)
- Sharon McGonigle
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| | - Zhihong Chen
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| | - Jiayi Wu
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| | - Paul Chang
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.,Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | | | - Karen Ackermann
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| | - Natalie C Twine
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| | - Jue-Lon Shie
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| | - Jingzang Tao Miu
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA.,Current address: Moderna Therapeutics, Cambridge, MA 02139, USA
| | - Kuan-Chun Huang
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| | - George A Moniz
- Integrated Chemistry, Eisai Inc., Andover, MA 01810, USA.,Current address: Biogen, Cambridge, MA 02142, USA
| | - Kenichi Nomoto
- Discovery Biology, Oncology PCU, Eisai Inc., Andover, MA 01810, USA
| |
Collapse
|
48
|
Abstract
Human cells have numerous repair mechanisms to counteract various insults incurred on the DNA. Any mutation in these repair mechanisms can lead to accumulation of DNA errors and carcinogenesis. This review aims to discuss the therapeutic options in the two most common DNA repair deficient cancer syndromes, namely Lynch syndrome (hereditary non-polyposis colorectal cancer) and breast cancer susceptibility gene (BRCA) associated ovarian and breast cancer. Deficiency in DNA repair mechanisms renders these tumors with increased sensitivity to platinum agents. There has been increasing amount of information on the utility of the defects in DNA repair as targets for cancer therapy in these syndromes. Novel therapies like poly (ADP-ribose) polymerase (PARP) inhibitors are one of such example where the induction of double stranded breaks in DNA leads to tumoricidal effect in patients with homologous DNA repair deficiency. Interestingly, patients with DNA repair deficiencies tend to have a more favorable prognosis than sporadic malignancies. In microsatellite high colorectal cancer patients, this has been attributed to increased recruitment of CD8+ T lymphocytes in tumor microenvironment. However, these tumors are able to limit the host immune response by activation of immune checkpoints that seem like attractive targets of therapy in the future.
Collapse
Affiliation(s)
- Gaurav Goyal
- />Department of Internal Medicine, CHI Health Creighton University Medical Center, Omaha, NE USA
| | - Tiffany Fan
- />Class of 2017, Creighton University School of Medicine, Omaha, NE USA
| | - Peter Todd Silberstein
- />Division of Hematology/Oncology, CHI Health Creighton University Medical Center and VA Nebraska-Western Iowa Health Care System, Omaha, NE USA
| |
Collapse
|
49
|
Schouten PC, Dackus GMHE, Marchetti S, van Tinteren H, Sonke GS, Schellens JHM, Linn SC. A phase I followed by a randomized phase II trial of two cycles carboplatin-olaparib followed by olaparib monotherapy versus capecitabine in BRCA1- or BRCA2-mutated HER2-negative advanced breast cancer as first line treatment (REVIVAL): study protocol for a randomized controlled trial. Trials 2016; 17:293. [PMID: 27323902 PMCID: PMC4915081 DOI: 10.1186/s13063-016-1423-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 06/02/2016] [Indexed: 11/10/2022] Open
Abstract
Background Preclinical studies in breast cancer models showed that BRCA1 or BRCA2 deficient cell lines, when compared to BRCA proficient cell lines, are extremely sensitive to PARP1 inhibition. When combining the PARP1 inhibitor olaparib with cisplatin in a BRCA1-mutated breast cancer mouse model, the combination induced a larger response than either of the two compounds alone. Several clinical studies have investigated single agent therapy or combinations of both drugs, but no randomized clinical evidence exists for the superiority of carboplatin-olaparib versus standard of care therapy in patients with BRCA1- or BRCA2--mutated metastatic breast cancer. Methods/design This investigator-initiated study contains two parts. Part 1 is a traditional 3 + 3 dose escalation study of the carboplatin-olaparib combination followed by olaparib monotherapy. The carboplatin dose will be escalated from area under the curve (AUC) 3 to AUC 4 with an olaparib dose of 25 mg BID. Olaparib is subsequently escalated to 50, 75, and 100 mg BID until >1/6 of patients develop dose-limiting toxicity (DLT). The dose level below will be the maximum tolerable dose (MTD). It is expected that 15–20 patients are needed in Part I. In Part 2 BRCA1- or BRCA2-mutated HER2-negative breast cancer patients will be randomized between standard capecitabine 1250 mg/m2 BID day 1–14 q day 22, versus 2 cycles carboplatin-olaparib followed by olaparib monotherapy 300 mg BID. In total 104 events in 110 patients need to be observed to detect a 75 % clinically meaningful improvement in progression-free survival (PFS), from a median of 4 months (control) to 7 months (experimental) assuming a 2-year accrual and ≥6 months of follow-up with 80 % power (5 %, two-sided significance level). After progression on first line treatment, patients will receive physician’s best choice of paclitaxel, vinorelbine, eribulin, or capecitabine (experimental arm only) at standard dose. A compassionate use program of olaparib is available for patients in the standard arm after progression on second line treatment. Discussion Results might be pivotal for registration of olaparib as standard first line treatment in advanced BRCA1- or BRCA2-mutated breast cancer. Trial registration ClinicalTrials.gov identifier: NCT02418624. Registered on 9 March 2015. EudraCT number: 2013-005590-41. Registered on 15 October 2014. Protocol version 3.0. Electronic supplementary material The online version of this article (doi:10.1186/s13063-016-1423-0) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Philip C Schouten
- Department of Molecular Pathology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands
| | - Gwen M H E Dackus
- Department of Molecular Pathology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.,Department of Pathology, Utrecht University Medical Center, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands
| | - Serena Marchetti
- Division of Medical Oncology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.,Department of Clinical Pharmacology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands
| | - Harm van Tinteren
- Department of Biometrics, The Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands
| | - Gabe S Sonke
- Division of Medical Oncology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands
| | - Jan H M Schellens
- Department of Molecular Pathology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.,Division of Medical Oncology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.,Department of Clinical Pharmacology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.,Faculty of Science, Utrecht Institute of Pharmaceutical Sciences (UIPS), Universiteitsweg 99, 3584CG, Utrecht, The Netherlands
| | - Sabine C Linn
- Department of Molecular Pathology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands. .,Department of Pathology, Utrecht University Medical Center, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands. .,Division of Medical Oncology, Antoni van Leeuwenhoek Hospital - Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.
| |
Collapse
|
50
|
Jenner ZB, Sood AK, Coleman RL. Evaluation of rucaparib and companion diagnostics in the PARP inhibitor landscape for recurrent ovarian cancer therapy. Future Oncol 2016; 12:1439-56. [PMID: 27087632 PMCID: PMC4976841 DOI: 10.2217/fon-2016-0002] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 04/04/2016] [Indexed: 12/28/2022] Open
Abstract
Rucaparib camsylate (CO-338; 8-fluoro-2-{4-[(methylamino)methyl]phenyl}-1,3,4,5-tetrahydro-6H-azepino[5,4,3-cd]indol-6-one ((1S,4R)-7,7-dimethyl-2-oxobicyclo[2.2.1]hept-1-yl)methanesulfonic acid salt) is a PARP1, 2 and 3 inhibitor. Phase I studies identified a recommended Phase II dose of 600 mg orally twice daily. ARIEL2 Part 1 established a tumor genomic profiling test for homologous recombination loss of heterozygosity quantification using a next-generation sequencing companion diagnostic (CDx). Rucaparib received US FDA Breakthrough Therapy designation for treatment of platinum-sensitive BRCA-mutated advanced ovarian cancer patients who received greater than two lines of platinum-based therapy. Comparable to rucaparib development, other PARP inhibitors, such as olaparib, niraparib, veliparib and talazoparib, are developing CDx tests for targeted therapy. PARP inhibitor clinical trials and CDx assays are discussed in this review, as are potential PARP inhibitor combination therapies and likely resistance mechanisms.
Collapse
Affiliation(s)
- Zachary B Jenner
- Department of Gynecologic Oncology & Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- McGovern Medical School, formerly The University of Texas Health Science Center at Houston (UTHealth) Medical School, Houston, TX, USA
| | - Anil K Sood
- Department of Gynecologic Oncology & Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Robert L Coleman
- Department of Gynecologic Oncology & Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| |
Collapse
|