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A Study of Trastuzumab Emtansine in Combination With Atezolizumab or Placebo as a Treatment for Participants With Human Epidermal Growth Factor 2 (HER2)-Positive and Programmed Death-ligand 1 (PD-L1)-Positive Locally Advanced (LABC) or Metastatic Breast Cancer (MBC)
A Study of Trastuzumab Emtansine in Combination With Atezolizumab or Placebo as a Treatment for Participants With Human Epidermal Growth Factor 2 (HER2)-Positive and Programmed Death-ligand 1 (PD-L1)-Positive Locally Advanced (LABC) or Metastatic Breast Cancer (MBC)

NCT04740918

TerminatedPhase 3

Sponsor: Hoffmann-La Roche

Conditions: Metastatic Breast Cancer

Interventions: Trastuzumab Emtansine, Atezolizumab, Placebo

Countries: United States, Australia, Brazil, Canada, China, Colombia, Croatia, Finland

This study will evaluate the efficacy, safety and patient-reported outcomes of trastuzumab emtansine plus atezolizumab compared with trastuzumab emtansine plus placebo in participants with HER2-positive and PD-L1-positive LABC or MBC.Participants must have progressed either during or after prior trastuzumab- (+/- pertuzumab) and taxane-based therapy for LABC/MBC; or during (or within 6 months after completing) trastuzumab- (+/-pertuzumab) and taxane-based therapy in the neoadjuvant and/or adjuvant setting.

Eligibility overview

Sex: ALL

Age: 18 Years to

Healthy volunteers: No

Study type: INTERVENTIONAL

Eligibility criteria
Inclusion Criteria:

* HER2+ and PD-L1+ locally advanced (LABC) or metastatic breast cancer (MBC)
* Progression must have occurred during most recent treatment for LABC/MBC or during, or within 6 months after completing, neoadjuvant and/or adjuvant therapy
* Prior treatment with trastuzumab (+/- pertuzumab) and taxane in the neoadjuvant and/or adjuvant, locally advanced, or metastatic setting
* No more than two prior lines of therapy in the metastatic setting
* Measurable disease per RESIST version 1.1
* Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1
* Life expectancy \>= 6 months
* Adequate hematologic and end-organ function
* For women of childbearing potential: agreement to remain abstinent or use contraception, and agreement to refrain from donating eggs
* For men: agreement to remain abstinent or use contraceptive measures, and agreement to refrain from donating sperm

Exclusion Criteria:

* Prior treatment with trastuzumab emtansine in metastatic setting
* History of exposure to cumulative doses of anthracyclines
* Symptomatic or actively progressing central nervous system (CNS) metastases; asymptomatic CNS lesions ≤ 2cm without clinical requirement for local intervention or asymptomatic patients with treated CNS lesions are eligible
* Current Grade \>= 3 peripheral neuropathy
* Cardiopulmonary dysfunction
* History of malignancy within 5 years prior to initiation of study treatment, with the exception of the cancer under investigation and malignancies with a negligible risk of metastasis or death
* History of leptomeningeal disease
* Active or history of autoimmune disease or immune deficiency
* Active hepatitis B, hepatitis C and/or tuberculosis
* Prior allogeneic stem cell or solid organ transplantation
* Receipt of a live, attenuated vaccine within 4 weeks prior to initiation of study treatment, during treatment, or within 5 months following the last dose of study treatment
* Pregnancy or lactation
Locations (51)
  • Redlands, California, United States
  • Melbourne, Victoria, Australia
  • Salvador, Estado de Bahia, Brazil
  • Recife, Pernambuco, Brazil
  • Ijuí, Rio Grande do Sul, Brazil
  • São José do Rio Preto, São Paulo, Brazil
  • São Paulo, São Paulo, Brazil
  • Barrie, Ontario, Canada
  • Montreal, Quebec, Canada
  • Beijing, China
  • Beijing, China
  • Changchun, China
  • Guangzhou, China
  • Hangzhou, China
  • Harbin, China
  • Nanjing, China
  • Tianjing, China
  • Wuhan, China
  • Zhengzhou, China
  • Medellín, Colombia
  • Montería, Colombia
  • Zagreb, Croatia
  • Zagreb, Croatia
  • Helsinki, Finland
  • Tampere, Finland
  • Saint-Cloud, France
  • Avellino, Campania, Italy
  • Naples, Campania, Italy
  • Bologna, Emilia-Romagna, Italy
  • Oslo, Norway
  • + 21 more on CT.gov