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ST-01156

Phase 1

Advanced Solid Tumors | Small molecule | Oncology |BeyondSpring, Inc.|Trials Updated: Feb 18, 2026

ST-01156 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Sep 2025

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment171

FDA Designations

No designations recorded

ST-01156 clinical trials

ST-01156 · 1 trial · 4 indications

Phase 1 1
NCT07197554A Phase 1/1B Study of ST-01156, a Small Molecule RBM39 Degrader, in Patients With Advanced Solid MalignanciesAdvanced Solid Tumors
RECRUITING171 Analytics
PHASE1RECRUITING
A Phase 1/1B Study of ST-01156, a Small Molecule RBM39 Degrader, in Patients With Advanced Solid Malignancies
Advanced Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Part 1: Dose Escalation
First 28 days of treatment

To characterize the safety, tolerability, and adverse event (AE) profile of escalating doses of ST-01156 administered for 5 consecutive days followed by 2 days without study drug administration every 7 days, with a cycle defined as 28 days (4 weeks).

Secondary Endpoints

Part 1: Dose Escalation
First 28 days of treatment
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose EscalationEXPERIMENTALST-01156, administered orally once daily for 5 consecutive days followed by 2 days without study drug administration every 7 days

Interventions

NameTypeDescription
ST-01156DRUGST-01156 is an orally administered degrader of RBM39, a protein frequently upregulated in cancer
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Eligibility Criteria

Age Range16 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites6

Inclusion Criteria: * Age ≥ 18 years on the day of signing the consent form, except for adolescents with Ewing Sarcoma or other malignancies for which there is a biological rationale to support participation, in which case the participant is ≥ 16 years old. * Has a metastatic or locally advanced an...

Countries:United States
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Competitive Landscape -Other Solid Tumors 10 trials (matched to "Advanced Solid Tumors")

Frequently asked questions about ST-01156

What is ST-01156?

ST-01156 is an investigational small molecule drug being developed by BeyondSpring, Inc. for advanced solid tumors. It is in Phase 1 clinical development and is described as an RBM39 degrader. It has not been approved by the FDA and remains under study in a single recruiting trial.

What is ST-01156 used for?

ST-01156 is being studied for the treatment of advanced solid malignancies. The Phase 1/1B trial enrolling patients lists advanced solid tumors, Ewing sarcoma, hepatocellular carcinoma (HCC), and biliary tract cancer (BTC) as the conditions under investigation. It is investigational and not approved for any use.

What does ST-01156 target?

ST-01156 targets RBM39, an RNA-binding protein, and is characterized as a small molecule RBM39 degrader. By degrading RBM39, the drug is designed to interfere with the splicing and transcriptional processes that tumor cells depend on. This mechanism is being evaluated in patients with advanced solid malignancies.

Who is developing ST-01156?

BeyondSpring, Inc. (ticker BYSI) is developing ST-01156. The company is the sponsor of the Phase 1/1B study of the drug in advanced solid malignancies. BeyondSpring is a biopharmaceutical company focused on oncology therapeutics.

What phase is ST-01156 in?

ST-01156 is in Phase 1 clinical development. The ongoing study is a Phase 1/1B trial, and the drug is investigational, meaning it has not been approved by the FDA. No trials of ST-01156 have been completed to date.

What clinical trials is ST-01156 in?

ST-01156 is being evaluated in one clinical trial, NCT07197554, titled a Phase 1/1B study of ST-01156, a small molecule RBM39 degrader, in patients with advanced solid malignancies. The trial is currently recruiting in the United States and has an planned enrollment of 171 participants.