Phase Ia/Ib Study of RS-0139 in Patients With a Recurrent, Locally Advanced or Metastatic Solid Tumors

A Multicenter, Open Label, Two-step, Phase Ia/Ib Study of Tumor Targeted Prodrug RS-0139 in Patients With a Recurrent, Locally Advanced or Metastatic Solid Tumors

This study designed as a multicenter, open label, two-step study to determine the optimum dose, pharmacokinetics, and the safety of RS-0139 in patients with a recurrent, locally advanced or metastatic solid tumors. The research is planned as a two-step study (Phase Ia and phase Ib) and accelerated titration design (ATD) is used.

Study Overview

• Status: Completed
• Conditions: Solid Tumors
• Intervention / Treatment: Drug: RS-0139

• Study Type: Interventional
• Enrollment (Actual): 16
• Phase: Phase 1

Contacts and Locations

Study Locations

• Turkey (Türkiye)
  • Ankara, Turkey (Türkiye)
    • Abdurrahman Yurtaslan Ankara Onkoloji Eğitim ve Araştırma Hastanesi
  • Istanbul, Turkey (Türkiye)
    • Koç University Hospital Phase I Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Patients who have consented to participation in the trial.
• Patients of both sexes aged between 18 and 75 years.
• Patients with relapsed or refractory solid tumors who have failed available standard therapy or are not candidates for standard therapy.
• Patients who are willing to provide fresh or archival biopsy material before their participation to identify the integrin expression levels (for Phase Ib only).
• Patients who completed the previous treatments 21 days before the first dose of the study drug.
• Patients who have at least three months of life expectancy.
• Patients with ECOG performance score 0 to 1.

• Patients with adequate organ function defined as:

  • Hemoglobin ≥10 mg/dl
  • Neutrophil ≥1,500/µL
  • Platelet ≥100,000/µL
  • Creatinine ≤1.5xULN or creatinine clearance ≥60mL/sec/1.73m2
  • Total bilirubin ≤ 1.5xULN
  • AST/ALT ≤2.5xULN; for patients who have confirmed liver metastasis: AST/ALT ≤5xULN.
  • Prothrombin time ≤1.5xULN (in case of no anticoagulant treatment).
  • Normal levels of serum magnesium and potassium concentrations

Exclusion Criteria:

• Patients with active and/or uncontrolled central nervous system (CNS) metastasis.
• Patients who have interstitial lung disease or interstitial pneumonia.
• Patients who have serious cardiac dysfunction.
• Patients who have insufficient target organ function.
• Patients with positive tests for HAV, HBV, HCV or HIV.
• Patients who experienced grade 3 or higher toxicity related to the previous docetaxel treatment.
• Female patients who are pregnant or breastfeeding.
• Male patients with pregnant female partners.
• Patients enrolled in another clinical trial at the same time or recently completed an investigational drug study and received the last dose of an investigational drug within 30 days or five half-lives (whichever is longer).
• Patients who have serious medical conditions such as uncontrolled infection or untreated wounds.
• Patients who have bone marrow transplantation history.
• Patients who have hypersensitivity to docetaxel, components of RS-0139 and/or other taxanes.
• Patients taking inhibitors or inducers of CYP3A4, including grapefruit juice and OTC medications such as St. John's Wort.
• Patients who, in the judgment of the PI, are likely to be non-compliant or unable to cooperate.
• Patients who cannot be contacted in case of emergency.
• Patients who are the PI or sub-investigator, research assistant, pharmacist, study coordinator or other staff directly involved in conducting the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: RS-0139; There will be only RS-0139 arm in the study.	Drug: RS-0139; RS-0139 will be administered for the indication of solid tumors.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Dose-limiting toxicities (DLTs)	At the end of each cycle (Each cycle is 21 days)
The incidence of AEs, serious adverse events (SAEs) and treatment-emergent adverse events (TEAEs).	At the end of each cycle (Each cycle is 21 days)

Secondary Outcome Measures

Outcome Measure	Time Frame
Anti-tumor activity measured by tumor shrinkage (based on CT-scan evaluations)	At the end of Phase Ib (assessed up to 1 year)
Change in CA 125 / CA15-3 / CA 19-9 / CA 72-4 (depends on the tumor type)	At the end of Phase Ib (assessed up to 1 year)
Change in circulating tumor cells	At the end of Phase Ib (assessed up to 1 year)
Objective Response Rate (ORR)	At the end of Phase Ib (assessed up to 1 year)
Progression-Free Survival (PFS)	At the end of Phase Ib (assessed up to 1 year)
Duration of Response (DoR)	At the end of Phase Ib (assessed up to 1 year)
Peak plasma concentration (Cmax)	At the end of the Phase Ia and Ib (assessed up to 1 year)
AUC(o-t)	At the end of the Phase Ia and Ib (assessed up to 1 year)
AUC(0-∞)	At the end of the Phase Ia and Ib (assessed up to 1 year)
tmax	At the end of the Phase Ia and Ib (assessed up to 1 year)
t1/2	At the end of the Phase Ia and Ib (assessed up to 1 year)
λz	At the end of the Phase Ia and Ib (assessed up to 1 year)
CL	At the end of the Phase Ia and Ib (assessed up to 1 year)
Vss	At the end of the Phase Ia and Ib (assessed up to 1 year)

Collaborators and Investigators

• Sponsor: RS Arastirma Egitim Danismanlik Ilac Sanayi Ticaret A.S.

Study record dates

Study Major Dates

• Study Start (Actual): December 13, 2021
• Primary Completion (Actual): March 4, 2026
• Study Completion (Actual): March 4, 2026

Study Registration Dates

• First Submitted: February 5, 2020
• First Submitted That Met QC Criteria: February 6, 2020
• First Posted (Actual): February 7, 2020

Study Record Updates

• Last Update Posted (Actual): March 11, 2026
• Last Update Submitted That Met QC Criteria: March 8, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Keywords: chemotherapy; solid tumors; targeted
• Additional Relevant MeSH Terms: Respiratory Tract Diseases; Neoplasms; Lung Diseases; Neoplasms by Site; Respiratory Tract Neoplasms; Thoracic Neoplasms; Carcinoma, Bronchogenic; Bronchial Neoplasms; Lung Neoplasms; Neoplasms
• Other Study ID Numbers: RS-001

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No