Official Title
An Expanded Access, Single-Arm, Multicenter Study to Provide at Home Subcutaneous Administration of Pertuzumab and Trastuzumab Fixed-Dose Combination (PH FDC SC) for Patients With HER2-Positive Breast Cancer During the COVID-19 Pandemic
Brief Summary

This single arm, multicenter study provides the pertuzumab and trastuzumab fixed-dosecombination formulation for subcutaneous injection (PH FDC SC) administered at home by ahome health nursing provider for patients with human epidermal growth factor receptor2-positive (HER2+) breast cancer who have completed concurrent chemotherapy withpertuzumab (Perjeta) and trastuzumab (Herceptin) by intravenous administration (P+H IV)and are currently receiving or will be receiving maintenance therapy with P+H IV, PH FDCSC, or trastuzumab SC in the clinic. The main objective is to enable continuity of careduring the COVID-19 pandemic.This study will enroll approximately 200 patients in the United States.Participants with early or metastatic HER2+ breast cancer will be enrolled in this study.Participants with metastatic HER2+ breast cancer will receive treatment every 3 weeks andcontinue treatment unless early cessation is necessary due to disease recurrence, diseaseprogression, unacceptable toxicity, participant withdrawal of consent, or per physician'srecommendation. Participants with early HER2+ breast cancer will receive PH FDC SC tocomplete 1 year (up to 18 cycles) of dual blockade, including the P+H IV, PH FDC SC, ortrastuzumab SC they received prior to enrolling in this study, unless early cessation isnecessary due to disease recurrence, disease progression, unacceptable toxicity,participant withdrawal of consent, or per physician's recommendation.A remote cardiac surveillance substudy will be optional for patients enrolled at selectsites.The Sponsor may decide to terminate the study when the COVID-19 pandemic is no longer arisk for this patient population.

Approved for marketing
Treatment IND/Protocol
HER2-positive Breast Cancer

Drug: Pertuzumab and Trastuzumab Fixed-Dose Combination for Subcutaneous Administration (PH FDC SC)

PH FDC SC is given as a fixed dose (i.e. non-weight based) subcutaneous injection. Two
dosage configurations of PH FDC SC may be administered in the study: a 15-millilitre (mL)
loading dose consisting of 1200 milligrams (mg) pertuzumab and 600 mg trastuzumab and a
10-mL maintenance dose consisting of 600 mg pertuzumab and 600 mg trastuzumab.
Participants who have had ≥6 weeks since their last P+H IV, PH FDC SC, or are receiving
trastuzumab SC treatment must receive a loading dose before continuing with maintenance
doses for subsequent administrations. Note that participants receiving trastuzumab SC
only (i.e. without pertuzumab) must receive a loading dose regardless of time since last
treatment.
Other Name: Pertuzumab, Trastuzumab, and Hyaluronidase-zzxf,PHESGO®,RO7198574,RG6264

Eligibility Criteria

Inclusion Criteria:

- Female or male patients with histologically confirmed human epidermal growth factor
receptor 2-positive (HER2+) breast cancer who have completed chemotherapy in
combination with P+H IV and are currently receiving or will be receiving maintenance
P+H IV, PH FDC SC, or trastuzumab SC (regardless of remaining treatment cycles
[e.g., only 1 cycle remaining])

- HER2+ status must have been previously determined and is defined as 3+ by
immunohistochemistry (IHC) and/or positive by HER2 amplification by in situ
hybridization (ISH) with a ratio of ≥2 for the number of HER2 gene copies to the
number of chromosome 17 copies

- Eastern Cooperative Oncology Group (ECOG) performance status 0-2

- Intact skin at planned site of subcutaneous (SC) injections (thigh)

- Baseline and most recent (within 3 months) LVEF ≥ 50% measured by echocardiogram
(ECHO) or multiple-gated acquisition scan (MUGA)

- For women of childbearing potential: agreement to remain abstinent (refrain from
heterosexual intercourse) or use contraceptive measures, and agreement to refrain
from donating eggs, as defined in the protocol

- For men: agreement to remain abstinent (refrain from heterosexual intercourse) or
use a condom, and agreement to refrain from donating sperm, as defined in the
protocol

Exclusion Criteria:

- Current or prior history of active malignancy (other than current breast cancer)
within the last 5 years. Appropriately treated non-melanoma skin cancer; in situ
carcinomas, including cervix, colon, or skin; or Stage I uterine cancer within the
last 5 years are allowed

- Investigational treatment within 4 weeks of enrollment

- Patients with any severe infection within 4 weeks prior to initiation of study
treatment, including, but not limited to, hospitalization for complications of
infections should not be enrolled in the trial (in the current situation, this also
applies to patients with suspected or confirmed COVID-19 infection). Patients with
suspected or confirmed COVID-19 may be re-screened for eligibility following
physician-prescribed COVID-19 treatment and/or a quarantine period consistent with
current Centers for Disease Control and Prevention (CDC) guidelines.

- Patients who may have had a recent episode of thromboembolism and are still trying
to optimize the anticoagulation dose and/or have not normalized their INR

- Serious cardiac illness or medical conditions

- History of ventricular dysrhythmias or risk factors for ventricular dysrhythmias,
such as structural heart disease (e.g., severe left ventricular systolic dysfunction
[LVSD], left ventricular hypertrophy), coronary heart disease (symptomatic or with
ischemia demonstrated by diagnostic testing), clinically significant electrolyte
abnormalities (e.g., hypokalemia, hypomagnesemia, hypocalcemia), or family history
of sudden unexplained death or long QT syndrome

- Inadequate bone marrow function

- Impaired liver function

- Renal function with creatinine clearance <50 mL/min using the Cockroft-Gault formula

- Major surgical procedure unrelated to breast cancer within 28 days prior to study
entry or anticipation of the need for major surgery during the course of study
treatment

- Current severe, uncontrolled systemic disease that may interfere with planned
treatment (e.g., clinically significant cardiovascular, pulmonary, or metabolic
disease; wound-healing disorders)

- Pregnant or breastfeeding, or intending to become pregnant during the study or
within seven months after the last dose of study treatment

- Any serious medical condition or abnormality in clinical laboratory tests that, in
the investigator's judgment, precludes the patient's safe participation in, and
completion of, the study

- Known active liver disease, for example, active viral hepatitis infection (i.e.,
hepatitis B or hepatitis C), autoimmune hepatic disorders, or sclerosing cholangitis

- Concurrent, serious, uncontrolled infections, or known infection with human
immunodeficiency virus (HIV)

- Known hypersensitivity to any of the study drugs, excipients, and/or murine proteins
or a history of severe allergic or immunological reactions, e.g. difficult to
control asthma

- Previously experienced severe injection related reactions with P+H IV, PH FDC SC,
and/or trastuzumab SC

- Current chronic daily treatment with corticosteroids (dose >10 mg methylprednisolone
or equivalent excluding inhaled steroids)

Eligibility Gender
All
Eligibility Age
Minimum: 18 Years ~ Maximum: N/A
Countries
United States
Locations

Beverly Hills Cancer Center
Beverly Hills, California, United States

UCSF Helen Diller Family CCC
San Francisco, California, United States

Stanford Univ School of Med; Oncology
Stanford, California, United States

University Of Colorado
Aurora, Colorado, United States

MedStar Washington Hosp Center
Washington, District of Columbia, United States

Mayo Clinic-Jacksonville
Jacksonville, Florida, United States

University of Maryland School of Medicine
Baltimore, Maryland, United States

Dana Farber Cancer Institute
Boston, Massachusetts, United States

Mayo Clinic Hospital-Rochester, St. Marys Campus - PPDS
Minneapolis, Minnesota, United States

Memorial Sloan Kettering Cancer Center
New York, New York, United States

Levine Cancer Institute
Charlotte, North Carolina, United States

University of Washington Seattle Cancer Care Alliance
Seattle, Washington, United States

Clinical Trials, Study Director
Genentech, Inc.

Genentech, Inc.
NCT Number
MeSH Terms
COVID-19
Breast Neoplasms
Trastuzumab
Pertuzumab