A First-in-human Study to Evaluate the Safety, Tolerability and Pharmacokinetics of DS-6051b
A Phase 1/1B Multi-Center, Non Randomized, Open-Label, Multiple Dose First-In-Human Study Of DS-6051b, An Oral ROS1 And NTRK Inhibitor, In Subjects With Metastatic and/or Unresectable Solid Tumors
This date has not been verified as actual or estimated.
Primary Completion
March 2019
Actual (reported)
Study Completion
March 2019
Actual (reported)
Brief Summary
DS-6051b is an orally administered inhibitor of the tyrosine kinases (ROS1) and neurotropic tyrosine kinase receptors (NTRK). This phase 1 first-in-human study evaluates safety and tolerability of DS-6051b in cancer subjects and identify a recommended phase 2 dose (RP2D). In addition, this study will also assess the pharmacokinetic (PK)/pharmacodynamic (PD) profiles and preliminary efficacy of DS-6051b.
Registry Overview
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
Recruitment status
completed
Actual enrollment (reported)
46 participants
Study completion date
March 2019
Actual (reported)
Listed locations
1 countries · 6 sites
Trial Relationships
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Related Scientific Literature
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Study Timeline
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
Study Start
September 2014
Date type not reported
This date has not been verified as actual or estimated.
Part 1: Number of participants with dose-limiting toxicities
within 21 days following the first dose of treatment
Tumor response
Tumor response will be assessed using Response Evaluation Criteria In Solid Tumors (RECIST) 1.1.
up to 2 years
Secondary Outcomes (4)
Maximum concentration (Cmax) for DS-6051a
At Days 1 and 15 of Cycle 1 (21 days)
Time to maximum concentration (Tmax) for DS-6051a
At Days 1 and 15 of Cycle 1 (21 days)
Area under the concentration-time curve from time zero to t (AUC0-t) for DS-6051a
At Days 1 and 15 of Cycle 1 (21 days)
Change from baseline in QTc interval
within 2 years
Study Arms (1)
DS-6051b
EXPERIMENTAL
DS-6051b is orally administered as 50 mg and 200 mg capsules once daily on Days 1 to 21 of a 21-day cycle. Dose escalation in Part 1 will continue until tentative Recommended Part 2 Dose (RP2D) is determined. In Part 2 participants will receive the RP2D.
Drug: DS6051b
Interventions
DS6051bDrug
DS-6051b 50 mg and 200 mg capsules for oral administration
Also known as: Investigational product, DS-6051a (a free base of 6051b)
DS-6051b
Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.
Eligibility Criteria
Age18 Years+
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)
You may qualify if:
Histologically or cytologically confirmed diagnosis of advanced solid tumors that have relapsed from or are refractory to standard treatment or for which no standard treatment is available
Part 1 Dose Escalation subjects must meet 1 of the following criteria:
Solid tumors with documented ROS1, NTRK1, NTRK2, or NTRK3 rearrangement
Neuroendocrine tumors
Solid tumors with tumor-induced pain
Part 2 Dose Expansion subjects must meet 1 of the following criteria:
NSCLC with documented ROS1, NTRK1, NTRK2, or NTRK3 rearrangement
k-RAS wild-type CRC with documented NTRK1, NTRK2, or NTRK3 rearrangement
Other solid tumors with documented ROS1, NTRK1, NTRK2, or NTRK3 rearrangement
Pulmonary LCNEC;
Male or female ≥18 years of age
Eastern Cooperative Oncology Group performance status 0 to 1
Adequate organ function
Adequate blood clotting function
Women of childbearing potential must have a negative pregnancy test
+1 more criteria
You may not qualify if:
Hematological malignancies
Known positive HIV infection, or active hepatitis B or C infection
Comorbidity that would interfere with therapy
Receipt of an allogeneic bone marrow or allogeneic stem cell transplant
Concomitant medical condition that would increase the risk of toxicity, in the opinion of the Investigator or Sponsor
History of myocardial infarction and unstable angina within 6 months before study drug treatment; symptomatic congestive heart failure (Congestive Heart Failure New York Heart Association Class III or IV); congenital long QT syndrome; or ventricular arrhythmias defined as grade ≥2 according to NCI CTCAE, v4
Clinically active primary central nervous system tumors or brain metastases with the exception of subjects with glioblastoma multiform that carry ROS1 rearrangement
Unresolved toxicities from previous anticancer therapy
Systemic treatment with anticancer therapy within 3 weeks before study drug treatment
Therapeutic radiation therapy or major surgery within 4 weeks before study drug treatment or palliative radiation therapy within 2 weeks before study drug treatment
Participation in a therapeutic clinical study within 3 weeks for biological treatments, and within 2 weeks or 5 half-lives, whichever is longer, for small molecule agents, before study drug treatment
Concomitant treatment with strong inhibitors or inducers of CYP3A4 and P-glycoprotein
Clinically significant malabsorption syndrome or other gastrointestinal disease that would impact drug absorption
QTcF values higher than 450 ms at screening
Breastfeeding
Contact the study team to confirm eligibility.
Colonic Diseases
Intestinal Diseases
Rectal Diseases
Neuroectodermal Tumors
Neoplasms, Germ Cell and Embryonal
Neoplasms by Histologic Type
Neoplasms, Nerve Tissue
Endocrine Gland Neoplasms
Pancreatic Diseases
Endocrine System Diseases
Primary Completion
March 2019
Actual (reported)
Study Completion
March 2019
Actual (reported)
Last Updated
June 24, 2025
Record last verified: 2025-06
Data Sharing
IPD Sharing
Will not share
Source record
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Source: ClinicalTrials.gov.
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