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MARGENZA delivered more time without disease progression1

In the pivotal SOPHIA trial, MARGENZA plus chemotherapy demonstrated superior PFS compared with trastuzumab plus chemotherapy1,*

MARGENZA delivered a 24% reduction in risk of disease progression or death1

Kaplan Meyer curve showing median progression free survival of 5.8 months for MARGENZA plus chemotherapy in 266 patients compared to 4.9 months for trastuzumab plus chemotherapy in 270 patients. The hazard ratio was 0.76. P value was 0.033.
Kaplan Meyer curve showing median progression free survival of 5.8 months for MARGENZA plus chemotherapy in 266 patients compared to 4.9 months for trastuzumab plus chemotherapy in 270 patients. The hazard ratio was 0.76. P value was 0.033.

*PFS was evaluated by blinded independent central review (BICR).
aBased on stratified Cox Model.
b+ censored indicates censored data.

PFS=progression-free survival.

Additional efficacy endpoints

MARGENZA
+ chemotherapy 		Trastuzumab
+ chemotherapy
OS2,c
Median (months) (95% CI) 		(n=266)
21.6 (18.9-25.1) 		(n=270)
21.9 (18.7-24.2)
Objective response rate for patients with measurable disease1,d
Confirmed ORR (%) (95% CI) 		(n=262)
22 (17-27) 		(n=262)
16 (12-20)
Duration of response1
Median (months) (95% CI)e 		(n=58)
6.1 (4.1-9.1) 		(n=42)
6.0 (4.0-6.9)

cHR=0.95 (95% CI, 0.77-1.17). The OS analysis for the intent-to-treat population did not demonstrate a statistically significant advantage.
dAssessed per BICR.
eBased on Kaplan-Meier estimates.

Explore prespecified exploratory subgroups by Fc𝛄 receptor genotype

See Exploratory PFS Analysis by CD16A Genotype

See Exploratory OS Analysis by CD16A Genotype

SOPHIA study design

The efficacy and safety of MARGENZA plus chemotherapy compared with trastuzumab plus chemotherapy was evaluated in SOPHIA, a randomized, multicenter, open-label trial of 536 metastatic HER2-positive breast cancer patients† who have received two or more prior anti-HER2 regimens, at least one of which was for metastatic disease.

†IHC 3+ or ISH-amplified HER2+.

SOPHIA study design included patients with HER2 positive metastatic breast cancer who had received 1 to 3 prior lines of treatment in the metastatic setting, including prior treatments with multiple other anti-HER2 agents footnote a. Patients enrolled in the study received the investigator’s choice of chemotherapy options, including capecitabine, eribulin, gemcitabine, and vinorelbine. Patients were then randomized 1:1 to be either in the MARGENZA plus chemotherapy group or trastuzumab plus chemotherapy group. A total of 536 patients were enrolled.
SOPHIA study design included patients with HER2 positive metastatic breast cancer who had received 1 to 3 prior lines of treatment in the metastatic setting, including prior treatments with multiple other anti-HER2 agents footnote a. Patients enrolled in the study received the investigator’s choice of chemotherapy options, including capecitabine, eribulin, gemcitabine, and vinorelbine. Patients were then randomized 1:1 to be either in the MARGENZA plus chemotherapy group or trastuzumab plus chemotherapy group. A total of 536 patients were enrolled.
SOPHIA study design included patients with HER2 positive metastatic breast cancer who had received 1 to 3 prior lines of treatment in the metastatic setting, including prior treatments with multiple other anti-HER2 agents footnote a. Patients enrolled in the study received the investigator’s choice of chemotherapy options, including capecitabine, eribulin, gemcitabine, and vinorelbine. Patients were then randomized 1:1 to be either in the MARGENZA plus chemotherapy group or trastuzumab plus chemotherapy group. A total of 536 patients were enrolled.
SOPHIA study design included patients with HER2 positive metastatic breast cancer who had received 1 to 3 prior lines of treatment in the metastatic setting, including prior treatments with multiple other anti-HER2 agents footnote a. Patients enrolled in the study received the investigator’s choice of chemotherapy options, including capecitabine, eribulin, gemcitabine, and vinorelbine. Patients were then randomized 1:1 to be either in the MARGENZA plus chemotherapy group or trastuzumab plus chemotherapy group. A total of 536 patients were enrolled.

fThe median number of prior lines of therapy in the locally advanced/metastatic setting was 2 (range: 1-4). All study patients had previously received trastuzumab, all but 1 patient had previously received pertuzumab, and 91% had previously received ado-trastuzumab emtansine; 47% had visceral disease, 57% had bone metastases, 13% had brain metastases, and 60% were hormone receptor positive.

  • The main efficacy outcome measures were PFS by BICR and OS. Additional efficacy outcome measures were ORR and DOR assessed by BICR
  • Patients were randomized (1:1) to MARGENZA plus chemotherapy or trastuzumab plus chemotherapy. Randomization was stratified by chemotherapy choice (capecitabine, eribulin, gemcitabine, or vinorelbine), number of lines of therapy in the metastatic setting (≤2, >2), and number of metastatic sites (≤2, >2)
  • Patients were required to have progressed on or after the most recent line of therapy. Prior radiotherapy and hormonal therapy were allowed
  • Patients were treated with MARGENZA or trastuzumab in combination with chemotherapy until disease progression or unacceptable toxicity
  • Patients received MARGENZA intravenously at a dose of 15 mg/kg every 3 weeks administered over 120 minutes for the initial administration and then over 30 to 120 minutes thereafter

See dosage and administration information

Learn more about the
SOPHIA study

See Publication

MARGENZA has a well-characterized safety profile

Safety of MARGENZA in combination with chemotherapy1

Adverse reactions (>10%) in patients with metastatic HER2+ breast cancer who received MARGENZA in SOPHIA

Adverse Reaction MARGENZA + chemotherapy (n=264) Trastuzumab + chemotherapy (n=266)
All grades (%) Grade 3 or 4 (%) All grades (%) Grade 3 or 4 (%)
Fatigue/Asthenia 57 7 47 4.5
Nausea 33 1.1 32 0.4
Diarrhea 25 2.3 25 2.3
Vomiting 21 0.8 14 1.5
Constipation 19 0.8 17 0.8
Headacheg 19 0 16 0
Pyrexia 19 0.4 14 0.4
Alopecia 18 0 15 0
Abdominal painh 17 1.5 21 1.5
Peripheral neuropathyi 16 1.1 15 2.3
Arthralgia/Myalgia 14 0.4 12 0.8
Cough 14 0.4 12 0
Decreased appetite 14 0.4 14 0.4
Dyspnea 13 1.1 11 2.3
Infusion-related reaction 13 1.5 3 0
Palmar-plantar erythrodysesthesia 13 0 15 3
Extremity pain 11 0.8 9 0

gIncludes headache and migraine.
hIncludes abdominal pain, abdominal discomfort, lower abdominal pain, and upper abdominal pain.
iIncludes peripheral neuropathy, peripheral sensory neuropathy, peripheral motor neuropathy, and neuropathy.

Serious adverse reactions occurred in 16% of patients who received MARGENZA.

  • Serious adverse reactions in >1% of patients included febrile neutropenia (1.5%), neutropenia/neutrophil count decrease (1.5%), and infusion-related reactions (1.1%)
  • Fatal adverse reactions occurred in 1.1% of patients who received MARGENZA, including viral pneumonia (0.8%) and aspiration pneumonia (0.4%)

Permanent discontinuation due to an adverse reaction occurred in 3% of patients who received MARGENZA.

  • Adverse reactions that resulted in permanent discontinuation in >1% of patients who received MARGENZA included left ventricular dysfunction and infusion-related reactions
  • Dosage interruptions due to an adverse reaction occurred in 11% of patients who received MARGENZA. Adverse reactions that required dosage interruption in >5% of patients who received MARGENZA included infusion-related reactions
References:

1. MARGENZA Prescribing Information. MacroGenics, Inc.; 2020.

2. Rugo HS, Im S, Cardoso F, et al. Margetuximab versus trastuzumab in patients with previously treated HER2-positive advanced breast cancer (SOPHIA): Final overall survival results from a randomized phase 3 trial. J Clin Oncol. Published online November 4, 2022. doi:10.1200/JCO.21.02937

Dosage and administration
information

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IMPORTANT SAFETY INFORMATION

WARNING: LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY

  • Left Ventricular Dysfunction: MARGENZA may lead to reductions in left ventricular ejection fraction (LVEF). Evaluate cardiac function prior to and during treatment. Discontinue MARGENZA treatment for a confirmed clinically significant decrease in left ventricular function.
  • Embryo-Fetal Toxicity: Exposure to MARGENZA during pregnancy can cause embryo-fetal harm. Advise patients of the risk and need for effective contraception.
WARNINGS & PRECAUTIONS:
Left Ventricular Dysfunction
  • Left ventricular cardiac dysfunction can occur with MARGENZA.
  • In SOPHIA, left ventricular dysfunction occurred in 1.9% of patients treated with MARGENZA.
  • MARGENZA has not been studied in patients with a pretreatment LVEF value of <50%, a prior history of myocardial infarction or unstable angina within 6 months, or congestive heart failure NYHA class II-IV.
  • Withhold MARGENZA for ≥16% absolute decrease in LVEF from pretreatment values or LVEF below institutional limits of normal (or 50% if no limits available) and ≥10% absolute decrease in LVEF from pretreatment values.
  • Permanently discontinue MARGENZA if LVEF decline persists greater than 8 weeks, or dosing is interrupted more than 3 times due to LVEF decline.
  • Evaluate cardiac function within 4 weeks prior to and every 3 months during and upon completion of treatment. Conduct thorough cardiac assessment, including history, physical examination, and determination of LVEF by echocardiogram or MUGA scan.
  • Monitor cardiac function every 4 weeks if MARGENZA is withheld for significant left ventricular cardiac dysfunction.
Embryo-Fetal Toxicity
  • Based on findings in animals and mechanism of action, MARGENZA can cause fetal harm when administered to a pregnant woman. Post-marketing studies of other HER2 directed antibodies during pregnancy resulted in cases of oligohydramnios and oligohydramnios sequence manifesting as pulmonary hypoplasia, skeletal abnormalities, and neonatal death.
  • Verify pregnancy status of women of reproductive potential prior to initiation of MARGENZA.
  • Advise pregnant women and women of reproductive potential that exposure to MARGENZA during pregnancy or within 4 months prior to conception can result in fetal harm.
  • Advise women of reproductive potential to use effective contraception during treatment and for 4 months following the last dose of MARGENZA.
Infusion-Related Reactions (IRRs)
  • MARGENZA can cause IRRs. Symptoms may include fever, chills, arthralgia, cough, dizziness, fatigue, nausea, vomiting, headache, diaphoresis, tachycardia, hypotension, pruritus, rash, urticaria, and dyspnea.
  • In SOPHIA, IRRs were reported by 13% of patients on MARGENZA plus chemotherapy. Most of the IRRs occur during Cycle 1. Grade 3 IRRs were reported in 1.5% of MARGENZA-treated patients.
  • Monitor patients during and after MARGENZA infusion. Have medications and emergency equipment to treat IRRs available for immediate use.
  • In patients experiencing mild or moderate IRRs, decrease rate of infusion and consider premedications, including antihistamines, corticosteroids, and antipyretics. Monitor patients until symptoms completely resolve.
  • Interrupt MARGENZA infusion in patients experiencing dyspnea or clinically significant hypotension and intervene with supportive medical therapy as needed. Permanently discontinue MARGENZA in all patients with severe or life-threatening IRRs.
MOST COMMON ADVERSE REACTIONS:

The most common adverse drug reactions (>10%) with MARGENZA in combination with chemotherapy are fatigue/asthenia (57%), nausea (33%), diarrhea (25%), vomiting (21%), constipation (19%), headache (19%), pyrexia (19%), alopecia (18%), abdominal pain (17%), peripheral neuropathy (16%), arthralgia/myalgia (14%), cough (14%), decreased appetite (14%), dyspnea (13%), infusion-related reactions (13%), palmar-plantar erythrodysesthesia (13%), and extremity pain (11%).

You may report side effects to the FDA at (800) FDA-1088 or www.fda.gov/medwatch or to MacroGenics at (844)-MED-MGNX (844-633-6469).

INDICATION

MARGENZA is a HER2/neu receptor antagonist indicated, in combination with chemotherapy, for the treatment of adult patients with metastatic HER2-positive breast cancer who have received two or more prior anti-HER2 regimens, at least one of which was for metastatic disease.

Please see full Prescribing Information, including Boxed Warning.