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Afzal MZ, Vahdat LT. Evolving Management of Breast Cancer in the Era of Predictive Biomarkers and Precision Medicine. J Pers Med 2024; 14:719. [PMID: 39063972 PMCID: PMC11278458 DOI: 10.3390/jpm14070719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/17/2024] [Accepted: 06/30/2024] [Indexed: 07/28/2024] Open
Abstract
Breast cancer is the most common cancer among women in the world as well as in the United States. Molecular and histological differentiation have helped clinicians optimize treatments with various therapeutics, including hormonal therapy, chemotherapy, immunotherapy, and radiation therapy. Recently, immunotherapy has become the standard of care in locally advanced triple-negative breast cancer and an option across molecular subtypes for tumors with a high tumor mutation burden. Despite the advancements in personalized medicine directing the management of localized and advanced breast cancers, the emergence of resistance to these therapies is the leading cause of death among breast cancer patients. Therefore, there is a critical need to identify and validate predictive biomarkers to direct treatment selection, identify potential responders, and detect emerging resistance to standard therapies. Areas of active scientific and clinical research include novel personalized and predictive biomarkers incorporating tumor microenvironment, tumor immune profiling, molecular characterization, and histopathological differentiation to predict response and the potential emergence of resistance.
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Affiliation(s)
- Muhammad Zubair Afzal
- Medical Oncology, Comprehensive Breast Program, Dartmouth Cancer Center, Lebanon, NH 03755, USA
| | - Linda T. Vahdat
- Medical Oncology and Hematology (Interim), Dartmouth Cancer Center, Lebanon, NH 03755, USA;
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The role of HER2 alterations in clinicopathological and molecular characteristics of breast cancer and HER2-targeted therapies: a comprehensive review. MEDICAL ONCOLOGY (NORTHWOOD, LONDON, ENGLAND) 2022; 39:210. [PMID: 36175719 DOI: 10.1007/s12032-022-01817-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/03/2022] [Indexed: 12/24/2022]
Abstract
Breast cancer (BC) is the most common malignancy in women and one of the leading causes of cancer mortality, despite significant treatment advancements over the last decades. Human epidermal growth factor receptor-2 (HER2) is a member of the ERBB family of receptor tyrosine kinases which have long been known to mediate cancer cell growth and invasion through constitutive activation of oncogenic downstream signaling, such as PI3K/Akt/mTOR and MAPK. Overexpression/amplification of HER2 in various tumors, especially BC, offers the possible therapeutic potential for target therapies. HER2-targeted therapies, either with a combination of chemotherapy or through multi-anti-HER2 therapies without chemotherapy, have significantly improved the prognosis of HER2-positive tumors. In recent years, novel anti-HER2 agents and combination therapies have garnered much attention, especially for heavily treated advanced or metastatic BCs. HER2-positive BC is biologically a heterogeneous group depending on HER2 activation mechanisms, hormone receptor status, genome variations, tumor heterogeneity, and treatment resistance, which affect the treatment benefit and patients' outcomes. This review will discuss HER2 alternations (gene amplification or receptor overexpression) in BC, their correlation with clinicopathological characteristics and molecular characteristics, and HER2-based therapies in tumors with HER2 overexpression/amplification.
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Guarneri V, Dieci MV, Bisagni G, Brandes AA, Frassoldati A, Cavanna L, Musolino A, Giotta F, Rimanti A, Garrone O, Bertone E, Cagossi K, Nanni O, Piacentini F, Orvieto E, Griguolo G, Curtarello M, Urso L, Paré L, Chic N, D'Amico R, Prat A, Conte P. PIK3CA Mutation in the ShortHER Randomized Adjuvant Trial for Patients with Early HER2 + Breast Cancer: Association with Prognosis and Integration with PAM50 Subtype. Clin Cancer Res 2020; 26:5843-5851. [PMID: 32843527 DOI: 10.1158/1078-0432.ccr-20-1731] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/22/2020] [Accepted: 08/14/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE We explored the prognostic effect of PIK3CA mutation in HER2+ patients enrolled in the ShortHER trial. PATIENTS AND METHODS The ShortHER trial randomized 1,253 patients with HER2+ breast cancer to 9 weeks or 1 year of adjuvant trastuzumab combined with chemotherapy. PIK3CA hotspot mutations in exon 9 and 20 were analyzed by pyrosequencing. Expression of 60 genes, including PAM50 genes was measured using the nCounter platform. RESULTS A mutation of the PIK3CA gene was detected in 21.7% of the 803 genotyped tumors. At a median follow-up of 7.7 years, 5-year disease-free survival (DFS) rates were 90.6% for PIK3CA mutated and 86.2% for PIK3CA wild-type tumors [HR, 0.84; 95% confidence interval (CI), 0.56-1.27; P = 0.417]. PIK3CA mutation showed a favorable prognostic impact in the PAM50 HER2-enriched subtype (n = 232): 5-year DFS 91.8% versus 76.1% (log-rank P = 0.049; HR, 0.46; 95% CI, 0.21-1.02). HER2-enriched/PIK3CA mutated versus wild-type tumors showed numerically higher tumor-infiltrating lymphocytes (TIL) and significant upregulation of immune-related genes (including CD8A, CD274, PDCD1, and MYBL2, a proliferation gene involved in immune processes). High TILs as well as the upregulation of PDCD1 and MYBL2 were associated with a significant DFS improvement within the HER2-enriched subtype (HR, 0.82; 95% CI, 0.68-0.99; P = 0.039 for 10% TILs increment; HR, 0.81; 95% CI, 0.65-0.99; P = 0.049 for PDCD1 expression; HR, 0.72; 95% CI, 0.53-0.99; P = 0.042 for MYBL2 expression). CONCLUSIONS PIK3CA mutation showed no prognostic impact in the ShortHER trial. Within the HER2-enriched molecular subtype, patients with PIK3CA mutated tumors showed better DFS versus PIK3CA wild-type, which may be partly explained by upregulation of immune-related genes.
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Affiliation(s)
- Valentina Guarneri
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy.,Medical Oncology 2, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
| | - Maria Vittoria Dieci
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy. .,Medical Oncology 2, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
| | - Giancarlo Bisagni
- Department of Oncology and Advanced Technologies, Reggio Emilia, Italy
| | - Alba A Brandes
- Medical Oncology, Azienda Unità Sanitaria Locale di Bologna-IRCCS Istituto delle Scienze Neurologiche, Bologna, Italy
| | - Antonio Frassoldati
- Clinical Oncology, Department of Morphology, Surgery and Experimental Medicine, S Anna University Hospital, Ferrara, Italy
| | - Luigi Cavanna
- Department of Oncology-Hematology, G. da Saliceto Hospital, Piacenza, Italy
| | - Antonino Musolino
- Medical Oncology and Breast Unit, University Hospital of Parma, Parma, Italy.,Department of Medicine and Surgery, University of Parma, Parma, Italy
| | | | - Anita Rimanti
- Medical Oncology, Azienda Ospedaliera di Mantova, Mantova, Italy
| | - Ornella Garrone
- Breast Unit, Medical Oncology, A.O.S. Croce and Carle Teaching Hospital, Cuneo, Italy
| | - Elena Bertone
- Department of Gynecology and Obstetrics, Ospedale S. Anna, Turin, Italy
| | - Katia Cagossi
- Breast Unit Ausl Modena, Ramazzini Hospital, Carpi, Italy
| | - Oriana Nanni
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Federico Piacentini
- Division of Medical Oncology, Department of Medical and Surgical Sciences for Children & Adults, University Hospital of Modena, Modena, Italy
| | | | - Gaia Griguolo
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy.,Medical Oncology 2, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
| | - Matteo Curtarello
- Immunology and Molecular Oncology Unit, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
| | - Loredana Urso
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy
| | - Laia Paré
- SOLTI Breast Cancer Research Group, Barcelona, Spain
| | - Nuria Chic
- Department of Medical Oncology, Hospital Clínic de Barcelona, Barcelona, Spain.,Translational Genomics and Targeted Therapeutics in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Roberto D'Amico
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena, Modena, Italy.,Azienda Ospedaliero-Universitaria di Modena, Modena, Italy
| | - Aleix Prat
- SOLTI Breast Cancer Research Group, Barcelona, Spain.,Department of Medical Oncology, Hospital Clínic de Barcelona, Barcelona, Spain.,Translational Genomics and Targeted Therapeutics in Solid Tumors, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Pierfranco Conte
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy.,Medical Oncology 2, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
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Dieci MV, Miglietta F, Griguolo G, Guarneri V. Biomarkers for HER2-positive metastatic breast cancer: Beyond hormone receptors. Cancer Treat Rev 2020; 88:102064. [PMID: 32622272 DOI: 10.1016/j.ctrv.2020.102064] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 12/17/2022]
Abstract
The overexpression of human epidermal growth factor receptor-2 (HER2) results in a biologically and clinically aggressive breast cancer (BC) subtype. Since the introduction of anti-HER2 targeted agents, survival rates of patients with HER2-positive metastatic BC have dramatically improved. Currently, although the treatment decision process in metastatic BC is primarily based on HER2 and hormone-receptor (HR) status, a rapidly growing body of data suggests that several other sources of biological heterogeneity may characterize HER2-positive metastatic BC. Moreover, pivotal clinical trials of new anti-HER2 antibody-drug conjugates showed encouraging results in HER2-low metastatic BC, thus leading to the possibility, in the near future, to expand the pool of patients suitable for HER2-targeted treatments. The present review summarizes and puts in perspective available evidence on biomarkers that hold the greatest promise to become potentially useful tools for optimizing HER2-positive metastatic BC patients' prognostic stratification and treatment in the next future. These biomarkers include HER2 levels and heterogeneity, HER3, intrinsic molecular subtypes by PAM50 analysis, DNA mutations, and immune-related factors. Molecular discordance between primary and metastatic tumors is also discussed.
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Affiliation(s)
- Maria Vittoria Dieci
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy; Medical Oncology 2, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy.
| | - Federica Miglietta
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy
| | - Gaia Griguolo
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy; Medical Oncology 2, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
| | - Valentina Guarneri
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy; Medical Oncology 2, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
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The sensitivity and efficacy method of PIK3CA exon 9 E545A as a high diagnostic accuracy in breast cancer. J Genet Eng Biotechnol 2017; 16:71-76. [PMID: 30647707 PMCID: PMC6296600 DOI: 10.1016/j.jgeb.2017.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 09/22/2017] [Accepted: 10/05/2017] [Indexed: 11/30/2022]
Abstract
The phosphatidylinositol 3-kinases (PIK3s) are lipid kinases. Mutation in the exon 9 and exon 20 determined as a predictive factor in anti-HER-2 therapy. In some countries, such as Singapore, China, and Peru, PIK3CA exon 9 E545A was reported to produce the highest rate of mutation. In this research, we developed and optimized PIK3CA exon 9 E545A detection methods with intercalating dye SYBR Green I based on the Tm Shift approach by using prepared recombinant plasmid pGEMT-easy PIK3CA exon 9 and PIK3CA exon 9 E545A. Recombinant plasmid was used due to the limited number of samples. Methods Recombinant plasmid was prepared based on manufactured procedures, and this process was then followed by Tm prediction with Poland software, Tm Shift SYBR Green I development, and its characterization (reproducibility, repeatability, sensitivity, qPCR efficiency, and qPCR amplification), respectively. Result A method for PIK3CA E545A detection based on TM shift SYBR Green I has been successfully developed. The melting temperature for PIK3CA exon 9 was 78.1 ± 0.1 °C, while that for PIK3CA exon E545A was 80.20 °C. The Tm of mutant was the same as that predicted using Polland Software. The reproducibility of the methods was high, with the coefficient values for inter and intra assays were below 10% with a high sensitivity at 1%, while R2 0.99 and PCR efficiency was 97.75%. Conclusion The results presented here demonstrate that the PIK3CA exon 9 E545A detection method has a good sensitivity and efficacy assay, which proves that the method has a high diagnostic accuracy in breast cancer.
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Myers MB, Banda M, McKim KL, Wang Y, Powell MJ, Parsons BL. Breast Cancer Heterogeneity Examined by High-Sensitivity Quantification of PIK3CA, KRAS, HRAS, and BRAF Mutations in Normal Breast and Ductal Carcinomas. Neoplasia 2016; 18:253-63. [PMID: 27108388 PMCID: PMC4840288 DOI: 10.1016/j.neo.2016.03.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 02/22/2016] [Accepted: 03/01/2016] [Indexed: 12/20/2022]
Abstract
Mutant cancer subpopulations have the potential to derail durable patient responses to molecularly targeted cancer therapeutics, yet the prevalence and size of such subpopulations are largely unexplored. We employed the sensitive and quantitative Allele-specific Competitive Blocker PCR approach to characterize mutant cancer subpopulations in ductal carcinomas (DCs), examining five specific hotspot point mutations (PIK3CA H1047R, KRAS G12D, KRAS G12V, HRAS G12D, and BRAF V600E). As an approach to aid interpretation of the DC results, the mutations were also quantified in normal breast tissue. Overall, the mutations were prevalent in normal breast and DCs, with 9/9 DCs having measureable levels of at least three of the five mutations. HRAS G12D was significantly increased in DCs as compared to normal breast. The most frequent point mutation reported in DC by DNA sequencing, PIK3CA H1047R, was detected in all normal breast tissue and DC samples and was present at remarkably high levels (mutant fractions of 1.1 × 10(-3) to 4.6 × 10(-2)) in 4/10 normal breast samples. In normal breast tissue samples, PIK3CA mutation levels were positively correlated with age. However, the PIK3CA H1047R mutant fraction distributions for normal breast tissues and DCs were similar. The results suggest PIK3CA H1047R mutant cells have a selective advantage in breast, contribute to breast cancer susceptibility, and drive tumor progression during breast carcinogenesis, even when present as only a subpopulation of tumor cells.
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Affiliation(s)
- Meagan B Myers
- US Food and Drug Administration, National Center for Toxicological Research, Division of Genetic and Molecular Toxicology, 3900 NCTR Rd., Jefferson, AR 72079
| | - Malathi Banda
- US Food and Drug Administration, National Center for Toxicological Research, Division of Genetic and Molecular Toxicology, 3900 NCTR Rd., Jefferson, AR 72079
| | - Karen L McKim
- US Food and Drug Administration, National Center for Toxicological Research, Division of Genetic and Molecular Toxicology, 3900 NCTR Rd., Jefferson, AR 72079
| | - Yiying Wang
- US Food and Drug Administration, National Center for Toxicological Research, Division of Genetic and Molecular Toxicology, 3900 NCTR Rd., Jefferson, AR 72079
| | - Michael J Powell
- DiaCarta, Inc., JOINN Innovation Park, 2600 Hilltop Drive, Richmond, CA 94806
| | - Barbara L Parsons
- US Food and Drug Administration, National Center for Toxicological Research, Division of Genetic and Molecular Toxicology, 3900 NCTR Rd., Jefferson, AR 72079.
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