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To Evaluate the Safety, Tolerability, Pharmacokinetics and Antitumor Activity of DAY301 in Participants With Locally Advanced or Metastatic Solid Tumors

A Phase 1, Open Label, Multiple Dose, Dose Escalation and Expansion Study to Investigate the Safety, Tolerability, Pharmacokinetics and Antitumor Activity of the PTK7-Targeted Antibody-drug Conjugate DAY301 in Patients With Locally Advanced or Metastatic Solid Tumors

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06752681
Enrollment
300
Registered
2024-12-31
Start date
2024-11-18
Completion date
2028-12-01
Last updated
2026-07-22

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

Conditions

Advanced or Metastatic Solid Tumors

Keywords

Advanced or metastatic solid tumors, Dose Escalation, Dose Expansion, DAY301, PTK7-Targeted Antibody-drug Conjugate

Brief summary

This is a Phase 1a/1b, open-label, dose escalation and expansion study to evaluate the safety and anti-tumor activity of DAY301, a PTK7-directed antibody-drug conjugate (ADC) in participants with advanced or metastatic solid tumors. The study comprises of 2 phases: Phase 1a dose escalation where participants will be administered DAY301 at escalating dose levels to assess safety and tolerability, and to determine the maximum tolerated dose (MTD) and/or the recommended dose (RD); In Phase 1b dose expansion, DAY301 will be evaluated in dose expansion cohorts.

Interventions

DRUGDAY301

DAY301 will be administered as IV infusion

Sponsors

Day One Biopharmaceuticals, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Histologically or cytologically confirmed diagnosis of advanced or metastatic solid tumors of the following histologies: * Ovarian cancer * Esophageal squamous cell carcinoma * Triple-negative breast cancer * Non-small cell lung cancer * Small cell lung cancer * Head and neck squamous cell carcinoma * Cervical squamous cell carcinoma * Endometrial cancers (Participants must have been previously treated with standard of care systemic therapy, have refused standard therapy, or have no standard therapy available). * Availability of tumor tissue sample (either an archival specimen or a fresh biopsy) at screening * Measurable disease per Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1). * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. * Adequate organ function.

Exclusion criteria

* Prior use of PTK7 targeting treatment (Phase 1a) or prior use of PTK7 targeting treatments and/or topoisomerase 1 (TOP1) inhibitors (Phase 1b). * Phase 1b disease-specific

Design outcomes

Primary

MeasureTime frameDescription
Phase 1a: Dose Escalation: Number of participants with reported Dose Limiting Toxicities (DLTs)Within 21 days of first infusion (Day 1)To evaluate adverse events (AEs) considered dose limiting toxicities that occur in the first cycle of treatment (within a DLT observation period).
Phase 1a: Dose Escalation: Number of participants with reported adverse events (AEs) and serious AEs (SAEs)through the duration of treatment, up to approximately 12 monthsThe type, incidence, and severity of AEs and SAEs will be determined using the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) v5.0.
Phase 1a: Dose Escalation: Frequency of dose interruptionsthrough the duration of treatment, up to approximately 12 monthsThe frequency at which dose interruptions occur during dose-escalation
Phase 1a: Dose Escalation: Duration of dose interruptionsthrough the duration of treatment, up to approximately 12 monthsThe duration of dose interruptions that occur during dose-escalation.
Phase 1a: Dose Escalation: Frequency of dose reductionsthrough the duration of treatment, up to approximately 12 monthsThe frequency at which dose reductions occur during dose-escalation.
Phase 1a: Dose Escalation: Duration of dose reductionsthrough the duration of treatment, up to approximately 12 monthsThe duration of dose reductions that occur during dose-escalation.
Phase 1b: Dose Expansion: Objective response ratethrough the duration of treatment, up to approximately 12 monthsObjective response rate based on best overall response (BOR) will be assessed by investigators according to Response Evaluation Criteria in Solid Tumors (RECIST v1.1).
Phase 1b: Dose Expansion: Number of participants reporting AEs and SAEsthrough the duration of treatment, up to approximately 12 monthsThe type, incidence, and severity of AEs and SAEs will be determined using the NCI CTCAE v5.0.
Phase 1b: Dose Expansion: Frequency of dose interruptionsthrough the duration of treatment, up to approximately 12 monthsThe frequency at which dose interruptions occur during dose-expansion.
Phase 1b: Dose Expansion: Duration of dose interruptionthrough the duration of treatment, up to approximately 12 monthsThe duration of dose interruptions that occur during dose-expansion.
Phase 1b: Dose Expansion: Frequency of dose reductionsthrough the duration of treatment, up to approximately 12 monthsThe frequency at which dose reductions occur during dose-expansion.
Phase 1b: Dose Expansion: Duration of dose reductionsthrough the duration of treatment, up to approximately 12 monthsThe duration of dose reductions that occur during dose-expansion.

Secondary

MeasureTime frameDescription
Phase 1a and Phase 1b: Maximum concentration (Cmax) of DAY301Varying timepoints through the duration of treatment, up to approximately 12 monthsBlood samples will be collected at indicated time points for the analysis of pharmacokinetic parameters.
Phase 1a and Phase 1b: time to Cmax (Tmax) of DAY301Varying timepoints through the duration of treatment, up to approximately 12 monthsBlood samples will be collected at indicated time points for the analysis of pharmacokinetic parameters.
Phase 1a and Phase 1b: area under the curve (AUC) of DAY301Varying timepoints through the duration of treatment, up to approximately 12 monthsBlood samples will be collected at indicated time points for the analysis of pharmacokinetic parameters.
Phase 1a and Phase 1b: terminal half-life (t1/2) of DAY301Varying timepoints through the duration of treatment, up to approximately 12 monthsBlood samples will be collected at indicated time points for the analysis of pharmacokinetic parameters.
Phase 1a Dose Escalation: Objective response ratethrough the duration of treatment, up to approximately 12 monthsObjective response rate based on BOR will be assessed by investigators according to RECIST v1.1.
Phase 1a and 1b: Clinical Benefit rate (CBR)through the duration of treatment, up to approximately 12 monthsClinical Benefit rate will be assessed by investigators according to RECIST v1.1.
Phase 1a and 1b: duration of response (DOR)through the duration of treatment, up to approximately 12 monthsDuration of response will be assessed by investigators according to RECIST v1.1.
Phase 1a and 1b: time to response (TTR)through the duration of treatment, up to approximately 12 monthsTime to response will be assessed by investigators according to RECIST v1.1.
Phase 1a and 1b: Progression-free survivalthrough the duration of treatment, up to approximately 12 monthsProgression-free survival will be assessed by investigators according to RECIST v1.1.
Phase 1b: Overall survivalthrough the duration of treatment, up to approximately 12 monthsOverall survival will be assessed by investigators.
Phase 1a and 1b: Number of participants with positive antidrug antibodies (ADAs)varying timepoints through the duration of treatment, up to approximately 12 monthsAssessed by the measure of anti-drug antibodies in serum.

Countries

Canada, United States

Contacts

CONTACTDay One Clinical Trials Information
clinicaltrials@dayonebio.com650-484-0899

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 23, 2026