1
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Yuan P, Ma N, Xu B. Poly (adenosine diphosphate-ribose) polymerase inhibitors in the treatment of triple-negative breast cancer with homologous repair deficiency. Med Res Rev 2024. [PMID: 38922930 DOI: 10.1002/med.22058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/23/2024] [Accepted: 05/20/2024] [Indexed: 06/28/2024]
Abstract
Breast cancer (BC) is a highly heterogeneous disease, and the presence of germline breast cancer gene mutation (gBRCAm) is associated with a poor prognosis. Triple-negative breast cancer (TNBC) is a BC subtype, characterized by the absence of hormone and growth factor receptor expression, making therapeutic decisions difficult. Defects in the DNA damage response pathway due to mutation in breast cancer genes (BRCA 1/2) lead to homologous recombination deficiency (HRD). However, in HRD conditions, poly (adenosine diphosphate-ribose) polymerase (PARP) proteins repair DNA damage and lead to tumor cell survival. Biological understanding of HRD leads to the development of PARP inhibitors (PARPi), which trap PARP proteins and cause genomic instability and tumor cell lysis. HRD assessment can be an important biomarker in identifying gBRCAm patients with BC who could benefit from PARPi therapy. HRD can be identified by homologous recombination repair (HRR) gene-based assays, genomic-scarring assays and mutational signatures, transcription and protein expression profiles, and functional assays. However, gold standard methodologies that are robust and reliable to assess HRD are not available currently. Hence, there is a pressing need to develop accurate biomarkers identifying HRD tumors to guide targeted therapies such as PARPi in patients with BC. HRD assessment has shown fruitful outcomes in chemotherapy studies and preliminary evidence on PARPi intervention as monotherapy and combination therapy in HRD-stratified patients. Furthermore, ongoing trials are exploring the potential of PARPi in BC and clinically complex TNBC settings, where HRD testing is used as an adjunct to stratify patients based on BRCA mutations.
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Affiliation(s)
- Peng Yuan
- Department of VIP Medical Services, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Nan Ma
- Value & Implementation Global Medical & Scientific Affairs, MSD China, Shanghai, China
| | - Binghe Xu
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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2
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Pascual T, Fernandez-Martinez A, Agrawal Y, Pfefferle AD, Chic N, Brasó-Maristany F, Gonzàlez-Farré B, Paré L, Villacampa G, Saura C, Hernando C, Muñoz M, Galván P, Gonzàlez-Farré X, Oliveira M, Gil-Gil M, Ciruelos E, Villagrasa P, Gavilá J, Prat A, Perou CM. Cell-cycle inhibition and immune microenvironment in breast cancer treated with ribociclib and letrozole or chemotherapy. NPJ Breast Cancer 2024; 10:20. [PMID: 38448600 PMCID: PMC10918094 DOI: 10.1038/s41523-024-00625-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 02/22/2024] [Indexed: 03/08/2024] Open
Abstract
In this study, we performed genomic analyses of cell cycle and tumor microenvironment changes during and after ribociclib and letrozole or chemotherapy in the CORALLEEN trial. 106 women with untreated PAM50-defined Luminal B early breast cancers were randomly assigned to receive neoadjuvant ribociclib and letrozole or standard-of-care chemotherapy. Ki67 immunohistochemistry, tumor-infiltrating lymphocytes quantification, and RNA sequencing were obtained from tissue biopsies pre-treatment, on day 14 of treatment, and tumor specimens from surgical resection. Results showed that at surgery, Ki67 and the PAM50 proliferation scores were lower after ribociclib compared to chemotherapy. However, consistent reactivation of tumor cell proliferation from day 14 to surgery was only observed in the ribociclib arm. In tumors with complete cell cycle arrest (CCCA) at surgery, PAM50 proliferation scores were lower in the ribociclib arm compared to chemotherapy (p < 0.001), whereas the opposite was observed with tumor cellularity (p = 0.002). Gene expression signatures (GES) associated with antigen-presenting cells (APCs) and innate immune system activity showed increased expression post-chemotherapy but decreased expression post-ribociclib. Interferon-associated GES had decreased expression with CCCA and increased expression with non-CCCA. Our findings suggest that while both treatment strategies decreased proliferation, the depth and the patterns over time differed by treatment arm. Immunologically, ribociclib was associated with downregulated GES associated with APCs and the innate immune system in Luminal B tumors, contrary to existing preclinical data. Further studies are needed to understand the effect of CDK4/6 inhibition on the tumor cells and microenvironment, an effect which may vary according to tumor subtypes.
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Affiliation(s)
- Tomás Pascual
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
- SOLTI Cancer Research Group, Barcelona, Spain
- Medical Oncology Department, Hospital Clinic de Barcelona, Barcelona, Spain
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Aranzazu Fernandez-Martinez
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Yash Agrawal
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Adam D Pfefferle
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Nuria Chic
- Medical Oncology Department, Hospital Clinic de Barcelona, Barcelona, Spain
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Fara Brasó-Maristany
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Blanca Gonzàlez-Farré
- SOLTI Cancer Research Group, Barcelona, Spain
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
- Pathology Department, Hospital Clinic of Barcelona, Barcelona, Spain
| | - Laia Paré
- SOLTI Cancer Research Group, Barcelona, Spain
- Medical Oncology Department, Hospital Clinic de Barcelona, Barcelona, Spain
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | | | - Cristina Saura
- SOLTI Cancer Research Group, Barcelona, Spain
- Medical Oncology Department, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
- Breast Cancer Program, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Cristina Hernando
- Medical Oncology Department, Hospital Clínico Universitario de Valencia, Valencia, Spain
- Breast Cancer Biology Research Group, Biomedical Research Institute INCLIVA, Valencia, Spain
| | - Montserrat Muñoz
- SOLTI Cancer Research Group, Barcelona, Spain
- Medical Oncology Department, Hospital Clinic de Barcelona, Barcelona, Spain
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Patricia Galván
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Xavier Gonzàlez-Farré
- SOLTI Cancer Research Group, Barcelona, Spain
- Breast Cancer Unit, Hospital Universitari General de Catalunya, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Mafalda Oliveira
- SOLTI Cancer Research Group, Barcelona, Spain
- Medical Oncology Department, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
- Breast Cancer Program, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Miguel Gil-Gil
- IDIBELL, L'Hospitalet, Barcelona, Spain
- Department of Medical Oncology, Multidisciplinary Breast Cancer Unit, Institut Català d'Oncologia Medical Oncology, Barcelona, Spain
| | - Eva Ciruelos
- SOLTI Cancer Research Group, Barcelona, Spain
- Medical Oncology Department, Hospital 12 de Octubre, Madrid, Spain
- Medical Oncology Department, HM Hospitales Madrid, Madrid, Spain
| | | | - Joaquín Gavilá
- SOLTI Cancer Research Group, Barcelona, Spain
- Fundación Instituto Valenciano de Oncología, Valencia, Spain
| | - Aleix Prat
- SOLTI Cancer Research Group, Barcelona, Spain.
- Medical Oncology Department, Hospital Clinic de Barcelona, Barcelona, Spain.
- Translational Genomics and Targeted Therapies in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain.
- Department of Medicine, University of Barcelona, Barcelona, Spain.
- Breast Cancer Unit, IOB-Quirón Salud, Barcelona, Spain.
| | - Charles M Perou
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
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Dhakal A, Van Swearingen AED, O'Regan R, Anders CK. Systemic Therapy Approaches for Breast Cancer Brain and Leptomeningeal Metastases. Curr Treat Options Oncol 2022; 23:1457-1476. [PMID: 36136177 DOI: 10.1007/s11864-022-01011-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/12/2022] [Indexed: 11/25/2022]
Abstract
OPINION STATEMENT Brain metastasis arising from breast cancer is associated with a poor prognosis. Various systemic chemotherapy and targeted therapies which are effective against breast cancer often fail to provide benefits against brain metastasis. This is mainly due to limited penetration of the therapies across the blood-brain barrier, and divergent evolution of brain metastasis compared to the primary tumor. Thus, brain metastasis is typically treated upfront with local therapies, such as surgery and radiation, followed by systemic therapies. Systemic therapies with CNS permeability are favored in patients with brain metastasis. This paper reviews various systemic therapy options for breast cancer brain metastasis.
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Affiliation(s)
| | | | | | - Carey K Anders
- Duke Center for Brain and Spine Metastasis, Duke Cancer Institute, Duke University, Durham, NC, USA.
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4
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Herzog H, Dogan S, Aktas B, Nel I. Targeted Sequencing of Plasma-Derived vs. Urinary cfDNA from Patients with Triple-Negative Breast Cancer. Cancers (Basel) 2022; 14:4101. [PMID: 36077638 PMCID: PMC9454533 DOI: 10.3390/cancers14174101] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022] Open
Abstract
In breast cancer, the genetic profiling of circulating cell-free DNA (cfDNA) from blood plasma was shown to have good potential for clinical use. In contrast, only a few studies were performed investigating urinary cfDNA. In this pilot study, we analyzed plasma-derived and matching urinary cfDNA samples obtained from 15 presurgical triple-negative breast cancer patients. We used a targeted next-generation sequencing approach to identify and compare genetic alterations in both body fluids. The cfDNA concentration was higher in urine compared to plasma, but there was no significant correlation between matched samples. Bioinformatical analysis revealed a total of 3339 somatic breast-cancer-related variants (VAF ≥ 3%), whereof 1222 vs. 2117 variants were found in plasma-derived vs. urinary cfDNA, respectively. Further, 431 shared variants were found in both body fluids. Throughout the cohort, the recovery rate of plasma-derived mutations in matching urinary cfDNA was 47% and even 63% for pathogenic variants only. The most frequently occurring pathogenic and likely pathogenic mutated genes were NF1, CHEK2, KMT2C and PTEN in both body fluids. Notably, a pathogenic CHEK2 (T519M) variant was found in all 30 samples. Taken together, our results indicated that body fluids appear to be valuable sources bearing complementary information regarding the genetic tumor profile.
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Affiliation(s)
- Henrike Herzog
- Department of Gynecology, Medical Center, University of Leipzig, 04103 Leipzig, Germany
| | - Senol Dogan
- Soft Matter Physics Division, Peter-Debye-Institute, University of Leipzig, 04103 Leipzig, Germany
| | - Bahriye Aktas
- Department of Gynecology, Medical Center, University of Leipzig, 04103 Leipzig, Germany
| | - Ivonne Nel
- Department of Gynecology, Medical Center, University of Leipzig, 04103 Leipzig, Germany
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5
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Rodriguez-Calero A, Gallon J, Akhoundova D, Maletti S, Ferguson A, Cyrta J, Amstutz U, Garofoli A, Paradiso V, Tomlins SA, Hewer E, Genitsch V, Fleischmann A, Vassella E, Rushing EJ, Grobholz R, Fischer I, Jochum W, Cathomas G, Osunkoya AO, Bubendorf L, Moch H, Thalmann G, Ng CKY, Gillessen S, Piscuoglio S, Rubin MA. Alterations in homologous recombination repair genes in prostate cancer brain metastases. Nat Commun 2022; 13:2400. [PMID: 35504881 PMCID: PMC9065149 DOI: 10.1038/s41467-022-30003-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 04/12/2022] [Indexed: 12/31/2022] Open
Abstract
Improved survival rates for prostate cancer through more effective therapies have also led to an increase in the diagnosis of metastases to infrequent locations such as the brain. Here we investigate the repertoire of somatic genetic alterations present in brain metastases from 51 patients with prostate cancer brain metastases (PCBM). We highlight the clonal evolution occurring in PCBM and demonstrate an increased mutational burden, concomitant with an enrichment of the homologous recombination deficiency mutational signature in PCBM compared to non-brain metastases. Focusing on known pathogenic alterations within homologous recombination repair genes, we find 10 patients (19.6%) fulfilling the inclusion criteria used in the PROfound clinical trial, which assessed the efficacy of PARP inhibitors (PARPi) in homologous recombination deficient prostate cancer. Eight (15.7%) patients show biallelic loss of one of the 15 genes included in the trial, while 5 patients (9.8%) harbor pathogenic alterations in BRCA1/2 specifically. Uncovering these molecular features of PCBM may have therapeutic implications, suggesting the need of clinical trial enrollment of PCBM patients when evaluating potential benefit from PARPi.
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Affiliation(s)
- Antonio Rodriguez-Calero
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Institute of Pathology, University of Bern, Bern, Switzerland
| | - John Gallon
- Visceral Surgery and Precision Medicine Research Laboratory, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Dilara Akhoundova
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Department of Medical Oncology and Hematology, University Hospital Zurich, Zurich, Switzerland
| | - Sina Maletti
- Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Alison Ferguson
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Department of Oncology, Ludwig Cancer Centre, University of Lausanne, Lausanne, Switzerland
| | - Joanna Cyrta
- Department of Pathology, Institut Curie, University Paris Sciences et Lettres, Paris, France
| | - Ursula Amstutz
- Department of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Andrea Garofoli
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Viola Paradiso
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Scott A Tomlins
- Departments of Pathology and Urology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Ekkehard Hewer
- Institute of Pathology, University of Bern, Bern, Switzerland
- Institute of Pathology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Vera Genitsch
- Institute of Pathology, University of Bern, Bern, Switzerland
| | - Achim Fleischmann
- Institute of Pathology, University of Bern, Bern, Switzerland
- Institute of Pathology, Cantonal Hospital Thurgau, Münsterlingen, Switzerland
| | - Erik Vassella
- Institute of Pathology, University of Bern, Bern, Switzerland
| | - Elisabeth J Rushing
- Institute of Neuropathology, University Hospital Zurich, Zurich, Switzerland
| | - Rainer Grobholz
- Institute of Pathology, Cantonal Hospital Aarau, Aarau, Switzerland
| | - Ingeborg Fischer
- Institute of Pathology, Cantonal Hospital Aarau, Aarau, Switzerland
| | - Wolfram Jochum
- Institute of Pathology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - Gieri Cathomas
- Institute of Pathology, Cantonal Hospital Baselland, Liestal, Switzerland
| | - Adeboye O Osunkoya
- Departments of Pathology and Laboratory Medicine, and Urology, Emory University School of Medicine, Atlanta, USA
| | - Lukas Bubendorf
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Holger Moch
- Department of Pathology and Molecular Pathology, University Hospital Zurich, Zurich, Switzerland
| | - George Thalmann
- Department of Urology, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Charlotte K Y Ng
- Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Silke Gillessen
- Faculty of Biomedical Sciences, USI, Lugano, Switzerland
- Department of Oncology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
- Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
| | - Salvatore Piscuoglio
- Visceral Surgery and Precision Medicine Research Laboratory, Department of Biomedicine, University of Basel, Basel, Switzerland.
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland.
| | - Mark A Rubin
- Department for BioMedical Research, University of Bern, Bern, Switzerland.
- Bern Center for Precision Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
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6
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Treatments on the Horizon: Breast Cancer Patients with Central Nervous System Metastases. Curr Oncol Rep 2022; 24:343-350. [PMID: 35138599 DOI: 10.1007/s11912-022-01206-2] [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] [Accepted: 11/02/2021] [Indexed: 12/19/2022]
Abstract
PURPOSE OF REVIEW The goal of this paper is to provide a review on the current emerging management strategies as described in the literature pertaining to breast cancer and central nervous system metastases. As systemic oncology treatments evolve, so are new approaches to the management of central nervous system metastases from breast cancer. RECENT FINDINGS In this review, we describe how novel treatment strategies have evolved from standard chemotherapy to more targeted approaches, innovative drug delivery methodologies, immunotherapeutics, and radiotherapeutic approaches. We describe innovative treatment strategies on the horizon for breast cancer and central nervous metastases. Future therapeutics may be better able to penetrate through the blood-brain-barrier bypassing limitations from standard therapies. These pioneering strategies will hopefully improve patients' quality of life as well as survival.
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7
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Yordanova M, Hubert A, Hassan S. Expanding the Use of PARP Inhibitors as Monotherapy and in Combination in Triple-Negative Breast Cancer. Pharmaceuticals (Basel) 2021; 14:1270. [PMID: 34959671 PMCID: PMC8709256 DOI: 10.3390/ph14121270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/27/2021] [Accepted: 11/29/2021] [Indexed: 12/31/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is the most aggressive subtype of breast cancer, and is known to be associated with a poor prognosis and limited therapeutic options. Poly (ADP-ribose) polymerase inhibitors (PARPi) are targeted therapeutics that have demonstrated efficacy as monotherapy in metastatic BRCA-mutant (BRCAMUT) TNBC patients. Improved efficacy of PARPi has been demonstrated in BRCAMUT breast cancer patients who have either received fewer lines of chemotherapy or in chemotherapy-naïve patients in the metastatic, adjuvant, and neoadjuvant settings. Moreover, recent trials in smaller cohorts have identified anti-tumor activity of PARPi in TNBC patients, regardless of BRCA-mutation status. While there have been concerns regarding the efficacy and toxicity of the use of PARPi in combination with chemotherapy, these challenges can be mitigated with careful attention to PARPi dosing strategies. To better identify a patient subpopulation that will best respond to PARPi, several genomic biomarkers of homologous recombination deficiency have been tested. However, gene expression signatures associated with PARPi response can integrate different pathways in addition to homologous recombination deficiency and can be implemented in the clinic more readily. Taken together, PARPi have great potential for use in TNBC patients beyond BRCAMUT status, both as a single-agent and in combination.
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Affiliation(s)
- Mariya Yordanova
- Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada;
| | - Audrey Hubert
- Faculty of Medicine, Université de Montréal, Montréal, QC H3C 3T5, Canada;
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), l’Institut de Cancer de Montreal, Montreal, QC H2X 0A9, Canada
| | - Saima Hassan
- Faculty of Medicine, Université de Montréal, Montréal, QC H3C 3T5, Canada;
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), l’Institut de Cancer de Montreal, Montreal, QC H2X 0A9, Canada
- Division of Surgical Oncology, Department of Surgery, Centre Hospitalier de l’Université de Montréal (CHUM), Montreal, QC H2X 0C1, Canada
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8
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Kuemmel S, Harrach H, Schmutzler RK, Kostara A, Ziegler-Löhr K, Dyson MH, Chiari O, Reinisch M. Olaparib for metastatic breast cancer in a patient with a germline PALB2 variant. NPJ Breast Cancer 2020; 6:31. [PMID: 32728620 PMCID: PMC7382468 DOI: 10.1038/s41523-020-00174-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 06/23/2020] [Indexed: 01/24/2023] Open
Abstract
There is a strong biologic rationale that poly(adenosine diphosphate-ribose) polymerase (PARP) inhibitors may benefit a broader range of metastatic breast cancer (MBC) patients than covered by current approvals, which require a germline BRCA1/2 sequence variant affecting function. We report a patient with germline/somatic BRCA1/2 wild-type MBC, who had a dramatic response to the PARP inhibitor olaparib of at least 8 months' duration. The patient is a 37-year-old woman with recurrent, hormone receptor-positive, HER2-negative MBC that had progressed despite hormonal therapy and palbociclib. Sensitivity to olaparib was likely conferred by a germline sequence variant affecting function in PALB2 (exon 1, c.18G>T, p.(=)). This case documenting activity of olaparib monotherapy in germline/somatic BRCA1/2 wild-type MBC illustrates that the clinical potential of PARP inhibition in MBC extends beyond currently approved indications to additional patients whose tumors have (epi)genetic changes affecting homologous recombination repair.
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Affiliation(s)
- Sherko Kuemmel
- Interdisciplinary Breast Unit, Kliniken Essen-Mitte, Essen, Germany
| | - Hakima Harrach
- Interdisciplinary Breast Unit, Kliniken Essen-Mitte, Essen, Germany
| | - Rita K. Schmutzler
- Center for Familial Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Athina Kostara
- Interdisciplinary Breast Unit, Kliniken Essen-Mitte, Essen, Germany
| | | | - Mark H. Dyson
- Interdisciplinary Breast Unit, Kliniken Essen-Mitte, Essen, Germany
| | - Ouafaa Chiari
- Interdisciplinary Breast Unit, Kliniken Essen-Mitte, Essen, Germany
| | - Mattea Reinisch
- Interdisciplinary Breast Unit, Kliniken Essen-Mitte, Essen, Germany
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9
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Kim JS, Kim IA. Evolving treatment strategies of brain metastases from breast cancer: current status and future direction. Ther Adv Med Oncol 2020; 12:1758835920936117. [PMID: 32636942 PMCID: PMC7313341 DOI: 10.1177/1758835920936117] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 05/22/2020] [Indexed: 12/11/2022] Open
Abstract
Remarkable progress in breast cancer treatment has improved patient survival, resulting in an increased incidence of brain metastasis (BM). Current treatment options for BM are limited and are generally used for palliative purposes. Historically, local treatment, consisting of radiotherapy and surgery, is the standard of care due to delivery limitations of systemic treatments through the blood-brain barrier. However, as novel biological mechanisms for tumors and BM have been discovered, several innovative systemic agents, such as small-molecular-targeted therapy and immunotherapy, have begun to change the treatment paradigm. In addition, efforts to maximize antitumor effects have been attempted using combination therapy, informed by tumor biology. In this comprehensive review, we will highlight various clinical trials investigating the treatment of BM in breast cancer patients, discuss presently available treatment options, and suggest potential directions of future therapeutic targets.
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Affiliation(s)
- Jae Sik Kim
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - In Ah Kim
- Department of Radiation Oncology, Seoul National University Bundang Hospital, Gumi-ro 173, 82 Beon-gil, Bundang gu, Seongnam, 13620, Republic of Korea
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