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SL-279252

Phase 1

Squamous Cell Carcinoma of the Head and Neck | Small molecule | Oncology |Shattuck Labs, Inc.|Trials Updated: Apr 2, 2025

SL-279252 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Mar 2019

SL-279252 target and mechanism

Molecular targetPD1
Target classImmune Checkpoint
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment49

FDA Designations

No designations recorded

SL-279252 clinical trials

SL-279252 · 1 trial · 13 indications

Phase 1 1
NCT03894618SL-279252 (PD1-Fc-OX40L) in Subjects With Advanced Solid Tumors or LymphomasSquamous Cell Carcinoma of the Head and Neck
COMPLETED49 Analytics
PHASE1COMPLETED
SL-279252 (PD1-Fc-OX40L) in Subjects With Advanced Solid Tumors or Lymphomas
Squamous Cell Carcinoma of the Head and NeckUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety Profile of SL-279252
From Day 1 to 90 days after Last Dose of SL-279252

Number of participants with treatment emergent adverse events

Maximum Tolerated Dose (MTD) of SL-279252
From Day 1 to Day 21 (Schedule 1) or Day 28 (Schedule 2)

Number of participants with dose limiting toxicities (DLTs)

Secondary Endpoints

Recommended Phase 2 Dose for SL-279252
Approximately 32 months
Overall Response Rate of SL-279252
Approximately 32 months
Immunogenicity to SL-279252
Approximately 32 months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
SL-279252EXPERIMENTALIntravenous administration; Two possible dosing schedules for SL-279252 may be evaluated

Interventions

NameTypeDescription
SL-279252DRUGThe investigational product (IP), SL-279252, is a first-in-class agonist redirected checkpoint (ARC) fusion protein (FP) consisting of the extracellular domains of human programmed cell death 1 (PD- 1) and OX40L, linked by a central Fc domain (PD1-Fc-OX40L).
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites5

Inclusion Criteria: Participants are eligible to be included in the study only if all the following criteria apply. 1. Subject has voluntarily agreed to participate by giving written informed consent in accordance with ICH/GCP guidelines and applicable local regulations. 2. Subject has a histologi...

Countries:United StatesBelgiumCanadaSpain
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Frequently asked questions about SL-279252

What is SL-279252?

SL-279252 is an investigational small molecule immune checkpoint therapy being developed by Shattuck Labs, Inc. for advanced solid tumors and lymphomas. It was studied in a Phase 1 clinical trial that enrolled 49 participants with cancers including squamous cell carcinoma of the head and neck, melanoma, non-small cell lung cancer, and Hodgkin lymphoma.

What is SL-279252 used for in squamous cell carcinoma of the head and neck?

SL-279252 was studied as a treatment for squamous cell carcinoma of the head and neck, along with other advanced solid tumors and lymphomas. It was evaluated in a single Phase 1 trial in adults with these cancers. The trial has been completed, and SL-279252 remains an investigational agent rather than an approved therapy.

What does SL-279252 target?

SL-279252 targets PD1, an immune checkpoint protein. By binding PD1, the drug is designed to interfere with checkpoint signaling that tumors use to suppress immune responses. The molecule is described as a PD1-Fc-OX40L construct, combining PD1 targeting with an OX40L component in a single agent.

Who makes SL-279252?

SL-279252 is being developed by Shattuck Labs, Inc., which trades under the ticker STTK. The company sponsored the Phase 1 study of the drug in advanced solid tumors and lymphomas. Shattuck Labs is the developer associated with this asset.

What phase is SL-279252 in?

SL-279252 is in Phase 1 development. It has been evaluated in one completed Phase 1 trial, and no later-stage trials are recorded. The drug is investigational and has not been approved by the FDA for any indication.

What clinical trial was SL-279252 studied in?

SL-279252 was studied in the Phase 1 trial NCT03894618, titled SL-279252 (PD1-Fc-OX40L) in Subjects With Advanced Solid Tumors or Lymphomas. The completed, uncontrolled study enrolled 49 adults across the United States, Belgium, Canada, and Spain, and included squamous cell carcinoma of the head and neck among its cancer types.