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A Study of NPX887 for Participants With Solid Tumors Known to Express B7-H7/HHLA2
Trial Status: active
NPX887 is a human, antagonistic immunoglobulin G1 (IgG1) monoclonal antibody targeting
B7-H7 (HHLA2) that may potentiate an anti-tumor immune response. The goal of this
first-in-human study is to learn whether NPX887 is safe and tolerable and shows a
preliminary efficacy in participants with B7-H7 (HHLA2) expressing tumors at selected
dose(s). The main questions it aims to answer are:
- what is an appropriate dose to be given to participants?
- are the side effects of treatment manageable?
- what is the preliminary anti-tumor activities?
Participants who are treated will receive an intravenous (IV) infusion of NPX887 if their
disease has not progressed, and be closely monitored by the treating physicians.
Inclusion Criteria
Histologically or cytologically confirmed recurrent, metastatic solid tumor refractory to, or intolerant of, standard of care therapy in one of the following indications:
Phase 1a (Dose Escalation): Non-small cell lung carcinoma (NSCLC), small cell lung carcinoma (SCLC), renal cell carcinoma (RCC), colorectal carcinoma (CRC), gastric and gastro-esophageal carcinoma, esophageal adenocarcinoma, biliary tract cancers, ovarian carcinoma, and other solid tumor types known to express B7-H7/HHLA2.
Phase 1b including Part 1b (Dose Expansion) and Part 1c (Randomized Dose Comparison): participants who have clear cell RCC, EGFR mutant lung adenocarcinoma, or gastric/GEJ adenocarcinoma.
In Phase 1b, participants must have confirmed B7-H7/HHLA2 expression in their tumor determined via archival tissue IHC testing through a central lab (pre-screening).
Phase 1a: Evaluable disease (measurable or non-measurable) by RECIST v.1.1 criteria; Phase 1b: Measurable disease by RECIST v1.1 criteria with additional disease-specific enrollment criteria applied to clear cell RCC, EGFR mutant lung adenocarcinoma, or gastric/GEJ adenocarcinoma.
Eastern Cooperative Oncology Group (ECOG) performance status 0, 1, or 2.
Ability to understand and the willingness to sign a written informed consent document
Willing to use highly effective contraceptive measures throughout the trial.
Exclusion Criteria
Treatment with any of the following:
Systemic anticancer treatment ≤14 days or within 5 half-lives prior to the first dose of study drug, whichever is shorter.
Limited-field radiotherapy ≤7 days or extended-field thoracic radiotherapy ≤8 weeks of the first dose of study drug.
Have any unresolved toxicity of ≥Grade 2 from previous anti-cancer treatment, except for alopecia, chronic stable neuropathy for >4 months, changes in skin pigmentation, or requiring replacement therapy for endocrine abnormalities.
Participants with known brain metastases are excluded unless they are clinically stable, with no new or enlarging brain metastases as evidenced on MRI during screening.
History of Grade 3 immune-related pneumonitis or colitis.
Participants who discontinued prior immunotherapy due to immune-related toxicities, or history of unresolved prior immune-related toxicity except for endocrine abnormalities requiring replacement therapy or vitiligo.
Known autoimmune disease requiring immunosuppressive treatment requiring the equivalent of more than 10 mg prednisone daily.
Additional locations may be listed on ClinicalTrials.gov for NCT06240728.
Locations matching your search criteria
United States
Maryland
Baltimore
Johns Hopkins University/Sidney Kimmel Cancer Center
Status: Active
Name Not Available
Massachusetts
Boston
Beth Israel Deaconess Medical Center
Status: Active
Name Not Available
This study is comprised of Phase 1a (Dose Escalation) and Phase 1b including Part 1b
(Dose Expansion) and Part 1c (Randomized Dose Comparison). Phase 1a will test different
doses of NPX887 to determine the optimal dose(s) to continue with in Phase 1b. In the
Phase 1b, more participants will be tested to evaluate preliminary activities in multiple
disease-specific cohorts and compare the efficacy of the higher and lower doses chosen in
Phase 1a.
Throughout the study, safety and preliminary efficacy data will be collected to
characterize the clinical activity of NPX887. Samples of blood will be taken to help in
an understanding of how NPX887 behaves in the body by assessing the amount of drug in the
blood over time, and changes in blood components. Tumor tissue samples will be collected
at screening and on-treatment stages for biomarker analysis and pharmacodynamics (PD)
