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Study of GX-I7 in Combination With Pembrolizumab in Refractory or Relapsed (R/R) TNBC Subjects(GX-I7-CA-006/KEYNOTE-899)

A Phase 1b/2, Open Label, Dose Escalation Study to Evaluate Safety, Tolerability, Pharmacodynamics and Antitumor Activity of GX-I7 in Combination With Pembrolizumab in Subjects With Refractory or Relapsed (R/R) TNBC

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03752723
Enrollment
84
Registered
2018-11-26
Start date
2019-03-27
Completion date
2023-05-11
Last updated
2024-03-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Triple Negative Breast Cancer

Keywords

Breast cancer, TNBC

Brief summary

To evaluate the safety and tolerability of escalating doses GX-I7 in combination with standard dose pembrolizumab, and to evaluate objective response rate (ORR) in subjects with refractory or relapsed TNBC

Interventions

DRUGGX-I7

i.m.

DRUGPembrolizumab(KEYTRUDA®)

i.v.

DRUGCyclophosphamide

i.v.

Sponsors

Merck Sharp & Dohme LLC
CollaboratorINDUSTRY
Genexine, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
19 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: 1. Triple negative must be defined as guidelines of American Society of Clinical Oncology(ASCO)/ College of American Pathologist(CAP): Estrogen Receptor (ER) \< 1% positive tumor nuclei, Progesterone Receptor (PR) \< 1% positive tumor nuclei, and negative for HER2 by IHC 1+, 0 or negativity status confirmed by in situ hybridization (ISH). 2. Subject must have received anthracycline and taxane based chemotherapy for TNBC 3. Has measurable disease as defined by RECIST 1.1 as assessed by the the local site Investigator/radiology. 4. Female subjects, age ≥ 19 years at the time of consent. Key

Exclusion criteria

1. Known severe hypersensitivity (≥ Grade 3) to pembrolizumab, pembrolizumab formulation excipients or GX-I7 formulation excipients or cyclophosphamide formulation. 2. Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another co-inhibitory T-cell receptor (ie, CTLA-4, OX-40, CD137) or has previously participated in a Merck pembrolizumab (MK-3475) clinical trial.

Design outcomes

Primary

MeasureTime frameDescription
Incidence and nature of DLTsduring the first 5 weeksTo evaluate the safety and tolerability of GX-I7 in combination with standard dose pembrolizumab
Incidence, nature and severity of adverse eventsup to 24monthgraded according to NCI CTCAE v5.0
Objective response rate (ORR)up to 24monthdefined as percentage of subjects with a complete response (CR) or partial response (PR) per RECIST v.1.1

Countries

South Korea

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 29, 2026