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A Study of APS03118 in Advanced Solid Tumors Harboring RET Mutations or Fusions

A Phase 1/1b Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of APS03118 in Adult Patients With Unresectable Locally Advanced or Metastatic Solid Tumors Harboring RET Mutations or Fusions

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05653869
Enrollment
108
Registered
2022-12-16
Start date
2023-02-06
Completion date
2026-10-01
Last updated
2026-01-22

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

Conditions

RET-altered Solid Tumors

Brief summary

This is a Phase 1/1b, open-label, first-in-human (FIH) study designed to evaluate the safety, tolerability, pharmacokinetics (PK) and preliminary antineoplastic activity of APS03118 administered orally in participants with RET-altered solid tumors.

Detailed description

After being informed about the study procedure and potential risks and benefits, all patients giving written informed consent will undergo a 4-week screening period to determine eligibility for study entry. The eligible participants will be enrolled using a rolling 6 dose escalation scheme to identify MTD and/or RP2D.

Interventions

DRUGAPS03118

Participant received APS03118 orally until evidence of unacceptable toxicity, progressed disease, consent withdrawal or with drawl from the study at the discretion of the investigator.

Sponsors

Applied Pharmaceutical Science, 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

1. Male or female patients aged 18 years or older 2. Have histological or cytological confirmation of unresectable locally advanced or metastatic solid tumors harboring oncogenic RET mutations or fusions confirmed by NGS. Site may identify patients with a RET-mutated or RET-fusion solid tumor before the formal screening. 3. Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1. 4. Resolution of all toxic effects of prior therapies to Grade 1 or below according to NCI CTCAE version 5.0 (except alopecia or Grade 2 neuropathy); 5. Patients with asymptomatic brain metastases if they have been previously treated, demonstrated no progression at least for 1 months before Screening, are asymptomatic and have had no requirement for steroids or enzyme inducing anticonvulsants in the last 14 days before Screening 6. Adequate organ function

Exclusion criteria

1. Have a locally advanced solid tumor that is a candidate for curative surgery treatment through radical surgery and/or radiotherapy. 2. Have an active fungal, bacterial, and/or active untreated viral infection 3. The patient has a serious pre-existing medical condition(s) 4. Have received or will receive a COVID-19 vaccine within 1 month before the first dose of APS03118.

Design outcomes

Primary

MeasureTime frameDescription
Incidence of DLTs during Cycle 1 in dose-escalation cohortsWithin the 28 days of the first APS03118 dose for each patient
The maximum tolerated dose (MTD) and / or recommended Phase II dose (RP2D)Approximately 15 monthsThe MTD is defined as the maximum dose at which the incidence of dose-limiting toxicities (DLTs) during Cycle 1 is below 30%(\<2/6)

Secondary

MeasureTime frameDescription
Adverse events(AE)Approximately 24 months
Peak Plasma Concentration (Cmax)Up to approximately 1 month
Area under the plasma concentration versus time curve (AUC)Up to approximately 1 month
Time to Maximum Concentration (Tmax)Up to approximately 1 month
Degree of accumulationUp to approximately 1 month
Overall Response Rate (ORR)Up to approximately 24 monthsAs assessed by Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1)
Duration of response (DOR)Up to approximately 24 months
Best of response (BOR)Up to approximately 24 months
Disease Control Rate (DCR)Up to approximately 24 months
Progress Free Survival (PFS)Up to approximately 24 months

Countries

China

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 29, 2026