This Phase 1, multi-center, open-label, first-in-human study evaluates multiple ascending daily oral doses of STC-15 in Q3W treatment cycles in a 3+3 cohort design with dose levels determined by a modified Fibonacci algorithm. The study is designed to systematically assess safety and tolerability, pharmacokinetics, pharmacodynamics and clinical activity of STC-15 in adult subjects with advanced malignancies. Dose levels for further evaluation in expansion cohorts will be selected based on all available PK, pharmacodynamic, target engagement, efficacy, safety, and tolerability data including long-term safety data beyond dose limiting toxicities (DLTs). The study may be amended to evaluate STC-15 in combination with a Food and Drug Administration-approved standard of care treatment regimen, which could encompass targeted/chemotherapy, radiation therapy and/or immunotherapy with immune checkpoint blockers.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
42
STC-15 oral capsules various dosing regimen in 3-week cycles
Honor Health
Scottsdale, Arizona, United States
The University of Texas MD Anderson Cancer Center
Houston, Texas, United States
South Texas Accelerated Research Therapeutics
San Antonio, Texas, United States
Number of participants with adverse events
To evaluate the incidence, severity, and duration of adverse events
Time frame: Screening through end of treatment, approximately 6 months
Cmax (PK)
To determine the Cmax concentration over a dosing interval, systemic clearance, volume of distribution at steady-state (Vss), and accumulation ratio from first dose to steady-state.
Time frame: Screening through Cycle 2 (each cycle is 21 days)
Tmax (PK)
To determine the time to Cmax (Tmax)
Time frame: Screening through Cycle 2 (each cycle is 21 days)
Ctrough (PK)
To determine observed trough serum concentration (Ctrough)
Time frame: Screening through end of treatment, approximately 6 months
Terminal elimination half life (PK)
To determine the terminal elimination half-life (t½)
Time frame: Screening through Cycle 2 (each cycle is 21 days)
AUC (PK)
To determine AUC in 1 dosing interval
Time frame: Screening through Cycle 2 (each cycle is 21 days)
Average concentration (PK)
To determine the average concentration over a dosing interval
Time frame: Screening through Cycle 2 (each cycle is 21 days)
Systemic Clearance (PK)
To determine the systemic clearance
Time frame: Screening through Cycle 2 (each cycle is 21 days)
Volume of distribution at steady-state (PK)
To determine the volume of distribution at steady-state (Vss)
Time frame: Screening through Cycle 2 (each cycle is 21 days)
Accumulation ratio from first dose to steady-state (PK)
To determine the accumulation ratio from first dose to steady-state
Time frame: Screening through end of treatment, approximately 6 months
Efficacy as measured by RECIST 1.1 (DoR)
Determine the duration of response (DoR)
Time frame: Screening through disease progression, approximately 6 months
Efficacy as measured by RECIST 1.1 (PFS)
Determine progression-free survival (PFS)/PFS assessed per immune-related response evaluation criteria (iPFS).
Time frame: Screening through disease progression, approximately 6 months
Efficacy as measured by RECIST 1.1 (DCR)
Determine the disease control rate (DCR)
Time frame: Screening through disease progression, approximately 6 months
Efficacy as measured by RECIST 1.1 (ORR)
Determine the objective response rate (ORR)
Time frame: Screening through disease progression, approximately 6 months
Recommended Phase 2 Dose (RP2D)
determine the RP2D for STC-15
Time frame: Screening through 90 days after the last dose of STC-15, approximately 9 months
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