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A Study Evaluating DS-1055a in Participants With Relapsed or Refractory Locally Advanced or Metastatic Solid Tumors

A Phase 1, First In Human Study of DS-1055a in Subjects With Relapsed or Refractory Locally Advanced or Metastatic Solid Tumors

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04419532
Enrollment
40
Registered
2020-06-05
Start date
2020-10-09
Completion date
2027-07-01
Last updated
2026-03-20

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

Conditions

Advanced Cancer, Metastatic Solid Tumor, Solid Tumor

Keywords

Solid Tumor, Advanced Cancer, Metastatic Solid Tumor, DS-1055a

Brief summary

The purpose of this study is to assess the safety and tolerability of DS-1055a in participants with relapsed or refractory locally advanced or metastatic solid tumors for which no standard treatment is available.

Detailed description

This Phase 1, open-label, non-randomized, dose escalation, first-in-human study will assess the safety and tolerability of DS-1055a, determine the maximum tolerated dose of DS-1055a, pharmacokinetic (PK) properties of DS-1055a, and the incidence of anti-drug antibodies (ADAs) against DS-1055a and other antibodies.

Interventions

DRUGDS-1055a

Administered as an intravenous infusion on Day 1 of every 21-day cycle following low dose administration(s) in priming dose period. Infusion duration: 180 minutes for the first infusion, and if no infusion-related reaction, 120 minutes for subsequent infusions

Sponsors

Daiichi Sankyo
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

* Has a histopathologically documented locally advanced or metastatic head and neck, gastric, esophageal cancer, non-small cell lung cancer, or melanoma. Participants with other types of solid tumors may be eligible following discussion with the Sponsor. * Has a relapsed or refractory disease that is not amenable to curative standard therapy. * Is 18 years of age or older. * Has an Eastern Cooperative Oncology Group Performance Status (ECOG PS) of 0-1, with no deterioration for two weeks. * Has a measurable disease based on Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. * Has adequate organ function within 7 days before enrollment. * Is able to provide written informed consent and is willing and able to comply with the protocol.

Exclusion criteria

* Has a concurrently active second malignancy, other than adequately treated non-melanoma skin cancers, in situ melanoma or in situ cervical cancer. Participants with history of the second malignancy have been disease-free for \<3 years. * Has a history of (non-infectious) interstitial lung disease (ILD) that required steroids, currently has ILD, or when suspected ILD cannot be ruled out by imaging at screening. * Has a history of severe pulmonary compromise or requirement of supplemental oxygen within 6 months before enrollment. * Has active hepatitis B or hepatitis C virus infection. * Has received prior immunotherapy with a Grade 3 or higher, or any unresolved ≥Grade 2 immune-related adverse event.

Design outcomes

Primary

MeasureTime frameDescription
Number of participants with dose-limiting toxicities21 days of Cycle 1A dose-limiting toxicity (DLT) is defined as any treatment-emergent adverse event (TEAE) that occurs during the DLT evaluation period (21 days), excluding toxicities clearly related to disease progression or intercurrent illness or to concomitant medications or to concomitant procedures and is Grade 3 or above according to National Cancer Institute-Common Terminology Criteria for Adverse Events Version 5.0, with certain specified exceptions.
Number of participants with adverse eventsBaseline up to approximately 3 yearsAdverse events were assessed using National Cancer Institute-Common Terminology Criteria for Adverse Events Version 5.0.

Secondary

MeasureTime frame
Maximum Plasma Concentration (Cmax)Priming Dose Cycle 1 Day 1 to Cycle 4 Day 1, and every 2 cycles from Cycle 4 to end of treatment, within approximately 2 years (each cycle is 21 days)
Time to Reach Maximum Plasma Concentration (Tmax)Priming Dose Cycle 1 Day 1 to Cycle 4 Day 1, and every 2 cycles from Cycle 4 to end of treatment, within approximately 2 years (each cycle is 21 days)
Area Under the Plasma Concentration-Time Curve Up to Last Quantifiable Time (AUClast) and During Dosing Interval (AUCtau)Priming Dose Cycle 1 Day 1 to Cycle 4 Day 1, and every 2 cycles from Cycle 4 to end of treatment, within approximately 2 years (each cycle is 21 days)
Minimum Observed Concentration (Ctrough)Priming Dose Cycle 1 Day 1 to Cycle 4 Day 1, and every 2 cycles from Cycle 4 to end of treatment, within approximately 2 years (each cycle is 21 days)
The Incidence of Anti-Drug Antibodies (ADA) and Other AntibodiesFrom pre-treatment to follow-up visit (within approximately 2 years)

Countries

Canada, Japan, United States

Contacts

STUDY_DIRECTORClinical Study Leader

Daiichi Sankyo

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 21, 2026