On December 11, 2019 AstraZeneca and Daiichi Sankyo Company, Limited (Daiichi Sankyo) reported positive detailed data from the global pivotal Phase II single-arm DESTINY-Breast01 trial of trastuzumab deruxtecan (DS-8201), a HER2-targeting antibody drug conjugate (ADC) and potential new medicine, in patients with HER2-positive metastatic breast cancer who received two or more prior HER2-targeted regimens (Press release, AstraZeneca, DEC 11, 2019, View Source [SID1234552252]).

The primary endpoint of objective response rate (ORR), confirmed by independent central review, was 60.9% with trastuzumab deruxtecan monotherapy (5.4mg/kg). Patients had a median of six prior therapies for metastatic disease (2-27).

Patients achieved a disease control rate (DCR) of 97.3% with a median duration of response (DoR) of 14.8 months and median progression-free survival (PFS) of 16.4 months. The median overall survival (OS) has not yet been reached, with an estimated survival rate of 86% at one year. The results were consistent across subgroups of patients.

José Baselga, Executive Vice President, Oncology R&D, said: "The clinically meaningful and durable responses seen among these patients illustrate the potential of trastuzumab deruxtecan to establish a new standard of care. These results are impressive, as women with this advanced stage of breast cancer have already endured multiple prior therapies for HER2-positive metastatic breast cancer."

Antoine Yver, Executive Vice President and Global Head, Oncology Research and Development, Daiichi Sankyo, said: "The strength of the pivotal results and the consistency with previously reported trastuzumab deruxtecan data further underscore that this specifically engineered HER2-targeted antibody drug conjugate is delivering on its intent of enhancing efficacy for patients with HER2-positive metastatic breast cancer."

Ian E. Krop, a principal investigator of the DESTINY-Breast01 trial and Associate Chief, Division of Breast Oncology, Susan F. Smith Center for Women’s Cancers, Dana-Farber Cancer Institute, said: "These results are particularly striking as trastuzumab deruxtecan prompted a high level of durable tumour reduction among patients, the majority of whom had exhausted most if not all standard therapies for HER2-metastatic breast cancer. We are excited by these results and their potential to help patients with this advanced stage of breast cancer."

Summary of resultsi
Efficacy measure
Total evaluable (n=184) ii

ORR (%) (95% CI)
60.9 (53.4-68)
CR (%)
6.0
PR (%)
54.9
SD (%)
36.4
PD (%)
1.6
DCR (%) (95% CI)iii
97.3 (93.8-99.1)
CBR (%) (95% CI)iv
76.1 (69.3-82.1)
Median DoR (95% CI)
14.8 months (13.8-16.9)
Median PFS (95% CI)
16.4 months (12.7-NE)
Estimated OS at 12 months (%) (95% CI)
86 (80-91)
CI, confidence interval; CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease; NE, not estimable.
i As assessed by independent central review.
ii 5.4mg/kg.
iii DCR is (CR + PR + SD)
iv CBR is (CR + PR + SD for ≥6 months)

The data were included as part of the press programme at the 2019 San Antonio Breast Cancer Symposium and simultaneously published online in The New England Journal of Medicine.

Prior therapies included trastuzumab emtansine (100%), trastuzumab (100%), pertuzumab (65.8%), other anti-HER2 therapies (54.3%), hormone therapies (48.9%) and other systemic therapies (99.5%). Median treatment duration for trastuzumab deruxtecan was 10 months (0.7-20.5) with a median duration of follow-up of 11.1 months (0.7-19.9). As of data cut-off on 1 August 2019, 42.9% of patients remained on treatment.

The safety and tolerability profile of trastuzumab deruxtecan in DESTINY-Breast01 was consistent with that observed in the Phase I trial. The most common Grade 3 or higher treatment-emergent adverse events were decreased neutrophil count (20.7%), anaemia (8.7%), nausea (7.6%), decreased white cell count (6.5%), decreased lymphocyte count (6.5%) and fatigue (6.0%). Overall, 13.6% of patients had confirmed interstitial lung disease (ILD) related to treatment as determined by an independent review. The events were primarily Grade 1 or 2 (10.9%) in severity with one Grade 3 (0.5%) and no Grade 4 events. Four deaths (2.2%) were determined to be due to ILD.

Regulatory submission of trastuzumab deruxtecan for the treatment of patients with HER2-positive metastatic breast cancer was recently accepted with Priority Review by the US Food and Drug Administration. A regulatory submission has also been made to Japan’s Ministry of Health, Labour and Welfare.

About HER2-positive breast cancer
Approximately one in five breast cancers are HER2-positive.1,2 Despite recent improvements and approvals of new medicines, there remains significant unmet needs for patients with advanced HER2-positive metastatic breast cancer.3,4 This disease remains incurable with patients eventually progressing after currently available treatments.3,4

About HER2
HER2 is a tyrosine kinase receptor growth-promoting protein found on the surface of some cancer cells that is associated with aggressive disease and poor prognosis in breast cancer patients.5 To be considered HER2-positive, tumour cancer cells are usually tested by one of two methods: immunohistochemistry (IHC) or fluorescent in situ hybridisation (FISH). IHC test results are reported as: 0, IHC 1+, IHC 2+, or IHC 3+.1 A finding of IHC 3+ and/or FISH amplification is considered positive.1

About DESTINY-Breast01
DESTINY-Breast01 is a pivotal Phase II, single-arm, open-label, global, multicentre, two-part trial evaluating the safety and efficacy of trastuzumab deruxtecan in patients with HER2-positive unresectable and/or metastatic breast cancer previously treated with trastuzumab emtansine. The primary endpoint of the trial is objective response rate, as determined by independent central review. Secondary objectives include duration of response, disease control rate, clinical benefit rate, progression-free survival and overall survival. Enrolment into DESTINY-Breast01 was completed in September 2018 with 184 patients at more than 100 sites globally.

About trastuzumab deruxtecan
Trastuzumab deruxtecan (DS-8201; fam-trastuzumab deruxtecan in the US only); is the lead product in the investigational ADC Franchise of the Daiichi Sankyo Cancer Enterprise and the most advanced programme in AstraZeneca’s ADC scientific platform. ADCs are targeted cancer medicines that deliver cytotoxic chemotherapy ("payload") to cancer cells via a linker attached to a monoclonal antibody that binds to a specific target expressed on cancer cells.

A comprehensive development programme is underway in North America, Europe and Asia, including five pivotal trials in HER2-expressing metastatic breast and gastric cancers, including a trial in patients with metastatic breast cancer and low levels of HER2 expression. Phase II trials are underway for HER2-expressing advanced colorectal cancer, as well as metastatic non-squamous HER2-overexpressing or HER2-mutated non-small cell lung cancer. Trials in combination with other anticancer treatments, such as immunotherapy, are also underway.

About the collaboration between AstraZeneca and Daiichi Sankyo
In March 2019, AstraZeneca and Daiichi Sankyo entered into a global collaboration to jointly develop and commercialise trastuzumab deruxtecan as a potential new medicine worldwide, except in Japan where Daiichi Sankyo maintains exclusive rights. Daiichi Sankyo is solely responsible for manufacturing and supply.

About AstraZeneca in Oncology
AstraZeneca has a deep-rooted heritage in oncology and offers a quickly growing portfolio of new medicines that has the potential to transform patients’ lives and the Company’s future. With at least six new medicines to be launched between 2014 and 2020, and a broad pipeline of small molecules and biologics in development, the Company is committed to advance oncology as a key growth driver for AstraZeneca focused on lung, ovarian, breast and blood cancers. In addition to AstraZeneca’s main capabilities, the Company is actively pursuing innovative partnerships and investments that accelerate the delivery of our strategy, as illustrated by the investment in Acerta Pharma in haematology.

By harnessing the power of four scientific platforms – Immuno-Oncology, Tumour Drivers and Resistance, DNA Damage Response and Antibody Drug Conjugates – and by championing the development of personalised combinations, AstraZeneca has the vision to redefine cancer treatment and, one day, eliminate cancer as a cause of death.

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On December 11, 2019 NanoString Technologies, Inc. (NASDAQ:NSTG), reported a leading provider of life science tools for translational research, reported the formation of the GeoMx Breast Cancer Consortium (GBCC) (Press release, NanoString Technologies, DEC 11, 2019, View Source [SID1234552269]).
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The consortium is focused on using the GeoMx Digital Spatial Profiler to address some of the most challenging translational research questions in breast cancer by applying spatial analysis. Some of the initial projects that the GBCC is planning include studies that will explore the immune interactions in HER2+ breast cancer, responsiveness to immunotherapy in triple-negative breast cancer (TNBC), disease evolution in metastatic breast cancer, and role of the tumor microenvironment in molecular epidemiological studies.

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Through the work of the GBCC, NanoString intends to develop a GeoMx Atlas database combining spatial and clinical data to enable meta-analyses to identify and validate oncology biomarkers in the spatial domain.

"By evaluating breast cancer with a spatial approach, we hope to expand our ability to understand the impact of treatments on the tumor, immune infiltrate and microenvironment," said Sandra Swain, M.D., Associate Dean for Research Development and Professor of Medicine at Georgetown University Medical Center. "In forming this consortium, we are promoting the importance of engaging innovative approaches across multiple studies to ensure rapid progress in discovery of novel biomarkers which may lead to more effective means of treating breast cancer."

"While earlier diagnosis and new therapies have improved patient outcomes in breast cancer, there are subgroups of patients with aggressive disease where effective therapies remain elusive," said Brad Gray, president and CEO of NanoString. "We believe that by applying spatial analysis, the GeoMx Breast Cancer Consortium can help to address some of the most pressing needs in breast cancer research."

Founding member institutions and investigators of the GeoMx Breast Cancer Consortium include:

The Dana Farber Cancer Institute: Elizabeth Mittendorf, M.D., Ph.D.
The Mayo Clinic: Jodi Carter, M.D., Ph.D.; Aubrey Thompson, Ph.D.; Fergus Couch, Ph.D.
The Peter MacCallum Cancer Centre: Sherene Loi, Ph.D.
The University of North Carolina, Chapel Hill: Melissa Troester, M.P.H., Ph.D.
Georgetown University Medical Center: Sandra Swain, M.D.
The Institut d’Investigacions Biomèdiques: August Pi i Sunyer (IDIBAPS): Aleix Prat, M.D., Ph.D.
Researchers that are interested in joining the GeoMx Breast Cancer Consortium can find an application at: View Source

On December 11, 2019 Roche (SIX: RO, ROG; OTCQX: RHHBY), the Breast International Group (BIG), Institut Jules Bordet Clinical Trials Support Unit (IJB-CTSU) and Frontier Science Foundation (FS) reported data from a second interim overall survival (OS) analysis of the phase III APHINITY study, evaluating the combination of Perjeta (pertuzumab), Herceptin (trastuzumab) and chemotherapy (the Perjeta-based regimen) as an adjuvant (after surgery) treatment for patients with HER2-positive early breast cancer (eBC) (Press release, Hoffmann-La Roche, DEC 11, 2019, View Source [SID1234552253]). This latest interim OS analysis was conducted after a median follow-up of approximately 74 months, compared to approximately 45 months for the primary analysis in 2017, and includes updated descriptive iDFS and cardiac safety data.1

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"The goal of adjuvant treatment is to give each person with early breast cancer the best chance of a cure," said Levi Garraway, M.D., Ph.D., Chief Medical Officer and Head of Global Product Development. "These new data with longer follow-up show the continued effect of the Perjeta-based regimen and an increased invasive disease-free survival benefit."

Martine Piccart, M.D., Ph.D., BIG co-founder and Scientific Director at Institut Jules Bordet, added: "These results demonstrate the importance of longer follow-up of APHINITY and further confirm the Perjeta-based regimen as the standard of care for people with HER2-positive early breast cancer at high risk of recurrence, such as those with lymph node-positive disease."

At this latest planned analysis, in the overall study population, the Perjeta-based regimen reduced the risk of breast cancer recurrence or death by 24%, compared to Herceptin, chemotherapy and placebo (HR=0.76; 95% CI 0.64-0.91). At six years, 90.6% of patients in the Perjeta arm have not seen their breast cancer return, compared to 87.8% in the placebo arm, an absolute benefit of 2.8%.1

Consistent with the primary analysis, the greatest effect continues to be observed in patients at high risk of recurrence, such as those with lymph node (LN)-positive disease. In these patients there was a 28% reduction in the risk of recurrence or death with the Perjeta-based regimen compared to Herceptin, chemotherapy and placebo (HR=0.72; 95% CI 0.59-0.87). This corresponds to an absolute improvement in iDFS at six years of 4.5% (87.9% vs. 83.4%). With longer follow-up, the treatment effect of the Perjeta-based regimen is seen regardless of hormone receptor (HR) status. The iDFS hazard ratio for HR-positive patients is 0.73 (95% CI 0.59-0.92). The iDFS hazard ratio for HR-negative patients is 0.83 (95% CI 0.63–1.10).1

Fewer deaths have been observed in the Perjeta-based regimen arm (125 vs. 147 [HR=0.85; 95% CI: 0.67-1.07]); however, data remain immature at this time. The APHINITY study continues as planned with the third interim analysis of OS scheduled for 2022. Continued follow-up of these patients is very important to determine a possible OS benefit.1

No new cardiac safety concerns emerged. The safety profile of the Perjeta-based regimen was consistent with that seen at primary analysis and in previous studies, with a low incidence of cardiac events. The percentage of primary cardiac events recorded in the Perjeta-based regimen arm was 0.8% vs. 0.3% in the placebo arm.1,2

Based on the primary study analysis in 2017, the clinical value of the Perjeta-based regimen for patients with HER2-positive eBC has been recognised by regulatory bodies around the world. This regimen is now approved for the treatment of eBC for people at a high risk of recurrence in more than 86 countries, including the US and across the EU. To date, more than 150,000 patients have been treated with the Perjeta-based regimen in this setting.3 The regimen has also been recognised in multiple international treatment guidelines, including those from St Gallen International Breast Cancer Conference, NCCN, ASCO (Free ASCO Whitepaper) and ESMO (Free ESMO Whitepaper), which recommend it as an adjuvant standard treatment for patients with HER2-positive eBC at high risk of recurrence.4,5,6,7

These results from APHINITY will be presented in an oral session on Wednesday 11 December at 09.30 CT at the 2019 San Antonio Breast Cancer Symposium (SABCS) in San Antonio, Texas, US, by Dr Martine Piccart (Abstract #GS1-04). The data will also be featured in SABCS’ official press programme.

About APHINITY
APHINITY (Adjuvant Pertuzumab and Herceptin IN Initial TherapY in Breast Cancer, NCT01358877/ BO25126/ BIG 4-11) is an international, phase III, randomised, double-blind, placebo-controlled, two-arm study evaluating the efficacy and safety of Perjeta plus Herceptin and chemotherapy, compared to Herceptin and chemotherapy, as adjuvant therapy in 4,805 people with operable HER2-positive eBC. The primary efficacy endpoint of the APHINITY study is iDFS, which in this study is defined as the time a patient lives without return of invasive breast cancer at any site, or death from any cause after adjuvant treatment. Secondary endpoints include cardiac and overall safety, OS, disease-free survival and health-related quality of life. The study will continue to follow participants for ten years.2,8

About Perjeta
Perjeta is a medicine that targets the HER2 receptor, a protein found on the outside of many normal cells and in high quantities on the outside of cancer cells in HER2-positive cancers. Perjeta is designed specifically to prevent the HER2 receptor from pairing (or ‘dimerising’) with other HER receptors (EGFR/HER1, HER3 and HER4) on the surface of cells, a process that is believed to play a role in tumour growth and survival.9 Binding of Perjeta to HER2 may also signal the body’s immune system to destroy the cancer cells. The mechanisms of action of Perjeta and Herceptin are believed to complement each other, as both bind to the HER2 receptor, but to different locations. The combination of Perjeta and Herceptin is thought to provide a more comprehensive, dual blockade of HER signalling pathways, thus preventing tumour cell growth and survival.10

About Roche’s medicines for HER2-positive breast cancer
Roche has been leading research into the HER2 pathway for over 30 years and is committed to improving the health, quality of life and survival of people with both early and metastatic HER2-positive disease. HER2-positive breast cancer is a particularly aggressive form of the disease that affects approximately 15-20% of patients.11 Roche has developed three innovative medicines that have helped transform the treatment of HER2-positive breast cancer: Herceptin (trastuzumab), Perjeta (pertuzumab) and Kadcyla (trastuzumab emtansine). Eligibility for treatment with Roche’s HER2-targeted medicines is determined via a diagnostic test which identifies people who will likely benefit from these medicines at the onset of their disease.

On December 11, 2019 PierianDx, the leading clinical genomics informatics company, reported that Intermountain Healthcare has selected the PierianDx Clinical Genomics Workstation to advance their precision medicine program, Intermountain Precision Genomics (Press release, PierianDx, DEC 11, 2019, View Source [SID1234552270]). Intermountain Healthcare will leverage PierianDx for next-generation sequencing (NGS) variant analysis, classification, and reporting services to assist in the identification of targeted therapies and potential clinical trial opportunities for cancer patients.

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PierianDx provides a SaaS platform, Clinical Genomics Workspace (CGW), the industry-leading clinical software for informatics, interpretation, and reporting of NGS data. By joining the PierianDx customer network, Intermountain Healthcare can access the genomic data within CGW’s knowledgebase, the most clinically robust database comprised of millions of biomedical findings driven by public and highly curated sources. Intermountain Healthcare joins a long list of other leading diagnostic labs and health systems using PierianDx.

"We are thrilled that Intermountain Healthcare has joined our rapidly expanding partner network," says Michael L. Sanderson, CEO of PierianDx. "Intermountain Healthcare is widely known as a leader in precision medicine and we look forward to continued collaboration opportunities."

On December 11, 2019 MacroGenics, Inc. (NASDAQ: MGNX), a clinical-stage biopharmaceutical company focused on discovering and developing innovative monoclonal antibody-based therapeutics for the treatment of cancer, reported updated results from the Phase 3 SOPHIA study comparing margetuximab plus chemotherapy versus trastuzumab plus chemotherapy in patients with HER2-positive metastatic breast cancer who have previously been treated with anti-HER2-targeted therapies (Press release, MacroGenics, DEC 11, 2019, View Source [SID1234553173]). Margetuximab is an investigational, immune-enhancing monoclonal antibody derived from the Company’s proprietary Fc-engineering technology platform. The data were presented today during an oral session at the San Antonio Breast Cancer Symposium (SABCS) by Dr. Hope Rugo, M.D., Director, Breast Oncology and Clinical Trials Education, University of California San Francisco Helen Diller Family Comprehensive Cancer Center.

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"Patients with later stage HER2-positive metastatic breast cancer need access to new therapies. The updated SOPHIA study results presented today at the second interim survival analysis showed a trend in overall survival favoring margetuximab and are encouraging. Furthermore, margetuximab is the only HER2-targeted agent to show PFS superiority versus trastuzumab in a head-to-head Phase 3 clinical trial," said Dr. Rugo. "The SOPHIA study also includes a pre-specified analysis of CD16A genotype as a predictor of anti-HER2 antibody efficacy, which although exploratory, is the first such prospective clinical analysis and suggests differential benefit in this population."

Overall survival (OS) results favored margetuximab plus chemotherapy compared with trastuzumab and chemotherapy in the intention-to-treat (ITT) population; however, these data did not reach statistical significance at this second interim analysis as of a September 2019 cut-off after 270 events (median OS=21.6 months versus 19.8 months; hazard ratio [HR]=0.89; 95% CI: 0.69-1.13; P=0.326). The final pre-specified OS analysis is planned after 385 events have accrued, which is projected to occur in the second half of 2020. A pre-specified exploratory objective of the study was to evaluate the effect of CD16A (Fcγ receptor) allelic variation on margetuximab activity. Among the genetically defined subpopulation of patients carrying a CD16A 158F allele, who represent approximately 85% of the human (and SOPHIA study) population, the median OS at the second interim analysis was prolonged by 4.3 months in the margetuximab arm compared to the trastuzumab arm (23.7 months versus 19.4 months; HR=0.79; 95% CI: 0.61-1.04; nominal P=0.087). Among the approximately 15% of patients who were homozygous for the CD16A 158V allele, the trastuzumab arm performed better than the margetuximab arm.

As previously reported, margetuximab plus chemotherapy showed a statistically significant improvement in independently-assessed progression-free survival (PFS) compared to trastuzumab plus chemotherapy in this study as of an October 2018 cut-off after 256 events (median PFS=5.8 months versus 4.9 months; HR=0.76; 95% CI: 0.59-0.98; P=0.033). An updated investigator-assessed analysis as of a September 2019 cut-off showed consistent results after 430 PFS events (median PFS=5.7 months in the margetuximab arm versus 4.4 in the trastuzumab arm; HR=0.71; nominal P=0.0006). Similarly, at the time of this updated analysis, additional patients were evaluable for response in the ITT population. Investigator-assessed objective response rate (ORR) was 25.2% (95% CI: 20.1-30.9%) in the margetuximab arm compared to 13.7% (95% CI: 9.8–18.4%) in the trastuzumab (nominal P=0.0006). The clinical benefit rate (CBR, which includes CR+PR+SD>6 months, was 48.1% (95% CI: 42.0-54.3%) in the margetuximab arm versus 35.6% (95% CI: 29.9-41.6%) in the trastuzumab arm (nominal P=0.0025).

"MacroGenics is focused on developing novel antibody-based therapies for patients who face unmet medical needs. We believe that margetuximab, if approved by regulators, will address an important unmet need and could become a valuable treatment option for patients living with this devastating disease," said Scott Koenig, M.D., Ph.D., President and CEO of MacroGenics. "We are grateful for the patients who participated in this study, as well as their families, and look forward to submitting a BLA to the FDA, which we expect to occur before the end of the year."

Margetuximab plus chemotherapy has shown a safety profile generally comparable to that of trastuzumab plus chemotherapy in this study. As of the April 2019 cut-off for safety, Grade 3 or greater adverse events occurred in 142 (54%) patients on the margetuximab arm compared to 140 (53%) patients on the trastuzumab arm. Serious adverse events occurred in 43 (16%) patients on the margetuximab arm compared to 49 (18%) patients on the trastuzumab arm. Infusion-related reactions (IRR) were more common with margetuximab treatment than with trastuzumab (13% versus 3%) and were mostly Grade 1 or 2 and associated with the first dose. A substudy evaluating shorter, 30-minute infusions of margetuximab in Cycle 2 and beyond showed no effect on safety outcomes, as well as risk or severity of IRR. These data will be presented at the SABCS during Poster Session 1, today from 5:00 – 7:00 p.m. CT (P1-18-04: Gradishar, et al. "Phase 3 SOPHIA study of margetuximab + chemotherapy vs trastuzumab + chemotherapy in patients with HER2+ metastatic breast cancer after prior anti-HER2 therapies: infusion time substudy results").

The presentations are available on the Events & Presentations page on MacroGenics’ website at View Source

About the SOPHIA Study

The SOPHIA study (NCT02492711) is a randomized, open-label Phase 3 clinical trial evaluating margetuximab plus chemotherapy compared to trastuzumab plus chemotherapy in patients with HER2-positive metastatic breast cancer, who have previously been treated with anti-HER2-targeted therapies. All study patients had previously received trastuzumab and pertuzumab, and approximately 90% had previously received ado-trastuzumab emtansine, or T-DM1.

The study enrolled 536 patients who were randomized 1:1 to receive either margetuximab (n=266) given intravenously at 15 mg/kg every three weeks or trastuzumab (n=270) given intravenously at 6 mg/kg (or 8 mg/kg for loading dose) every three weeks in combination with one of four chemotherapy agents (capecitabine, eribulin, gemcitabine or vinorelbine) given at the standard dose. Intent-to-treat PFS analysis occurred after 265 PFS events.

Primary endpoints are sequentially-assessed PFS, determined by centrally-blinded radiological review, and OS. Key secondary endpoints are PFS by investigator assessment and ORR. Tertiary endpoints include ORR by investigator assessment and safety. PFS and ORR were assessed according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1).

About HER2-positive Breast Cancer

Human epidermal growth factor receptor 2 (HER2) is a protein found on the surface of some cancer cells that promotes growth and is associated with aggressive disease and poor prognosis. Approximately 15-20% of breast cancer cases are HER2-positive. Monoclonal antibodies targeting HER2 have greatly improved outcomes of patients with HER2-positive breast cancer and are now standard of care in both early-and late-stage disease. However, metastatic breast cancer remains an unmet need that eventually advances to the point where no currently approved HER2-targeting therapy continues to control the disease. Ongoing HER2 blockade is recommended for relapsed or refractory patients, but there is no approved therapy in the third line and beyond setting, or established standard of care after progression with trastuzumab, pertuzumab and ado-trastuzumab emtansine.

About Margetuximab

Margetuximab is an investigational monoclonal antibody that targets the HER2 oncoprotein. HER2 is expressed by tumor cells in breast, gastroesophageal and other solid tumors. Margetuximab was designed to provide HER2 blockade and has similar HER2 binding and antiproliferative effects as trastuzumab. In addition, the Fc region of margetuximab has been engineered with MacroGenics’ Fc Optimization technology to enhance the engagement of the immune system. Margetuximab is also being evaluated in combination with anti-PD-1 therapy for the treatment of patients with HER2-positive gastroesophageal cancer. The company has initiated the registration-directed Phase 2/3 MAHOGANY trial (NCT04082364).