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Briquilimab

Phase 2

Urticaria Chronic | Small molecule | Dermatology |Jasper Therapeutics, Inc.|Last Updated: Feb 23, 2026

Target and mechanism

Molecular targetKIT
Target classInhibitor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment67

FDA Designations

ORPHAN_DRUGRARE_PEDIATRIC_DISEASE

Clinical trial landscape

Briquilimab · 2 trials · 2 indications

Phase 2 1Phase 1 1
NCT06736262A Phase 2, Open-Label, Extension Study to Evaluate Long Term Safety and Clinical Activity of Briquilimab in Participants From Jasper-Sponsored Chronic Urticaria TrialsUrticaria Chronic
ACTIVE NOT_RECRUITING67 Analytics
PHASE2ACTIVE NOT_RECRUITING
A Phase 2, Open-Label, Extension Study to Evaluate Long Term Safety and Clinical Activity of Briquilimab in Participants From Jasper-Sponsored Chronic Urticaria Trials
Urticaria ChronicUnlock trial analytics

Study Endpoints

Primary Endpoints

To evaluate the safety and tolerability of briquilimab
From signing the informed consent form through study completion (an average of one year)

Incidence and severity of AEs including SAEs, TEAEs and AEIs.

Evaluate the safety and tolerability of briquilimab
From signing the informed consent form (ICF) through end of trial (EOT) visit (up to 48 weeks)

Incidence and severity of treatment emergent AEs/SAEs

Secondary Endpoints

Evaluate the preliminary efficacy of briquilimab-- UAS7 Score
Change from baseline to Week 12 and all assessment time points through Week 48
Evaluate the preliminary efficacy of briquilimab - Urticaria Control Test (UCT)
Change from baseline to Week 12 and all assessment time points through Week 48
Maximum serum concentration (Cmax)
Up to 12 weeks
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
BriquilimabEXPERIMENTALBriquilimab via SQ injection
PlaceboPLACEBO_COMPARATORPlacebo Comparator

Interventions

NameTypeDescription
BriquilimabDRUGNo additional details needed
PlaceboOTHERPlacebo Comparator
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites19

Inclusion Criteria: 1. Provides informed written consent. 2. Previously participated in and completed an eligible Jasper-sponsored clinical trial (in the last 4 months) without any investigational product (IP)-related anaphylactic event 3. Disease specific eligibility: 1. Participants with CSU ...

Countries:United StatesGermany
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Recent Changes (Last 90 Days)

LOWMay 26, 2026NCT06162728primaryCompletionDate: changed
LOWMay 26, 2026NCT06736262primaryCompletionDate: changed
LOWMay 24, 2026NCT06162728studyFirstPostDate: changed
LOWMay 24, 2026NCT06736262studyFirstPostDate: changed

Frequently asked questions about Briquilimab

What is Briquilimab used for in Chronic Spontaneous Urticaria?

Briquilimab is an investigational small molecule being studied for the treatment of Chronic Spontaneous Urticaria (CSU), a condition characterized by recurrent hives without an identifiable trigger. It is currently in Phase 1 clinical development, with trials evaluating its safety, pharmacokinetics, pharmacodynamics, and preliminary clinical activity in adult patients with CSU.

What does Briquilimab target?

Briquilimab targets KIT, a receptor tyrosine kinase involved in mast cell growth and function. As a KIT inhibitor, it is being investigated for its potential to modulate mast cell activity in chronic urticaria. This mechanism is central to its proposed role in treating conditions like Chronic Spontaneous Urticaria, where mast cell dysregulation is a key factor.

Who makes Briquilimab?

Briquilimab is being developed by Jasper Therapeutics, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol JSPR. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with chronic urticaria, including a Phase 1 dose escalation study and a Phase 2 open-label extension study.

What phase is Briquilimab in?

Briquilimab is in Phase 1 clinical development for Chronic Spontaneous Urticaria. It is an investigational drug and has not been approved by the FDA. The ongoing Phase 1 trial is a randomized, double-blind, placebo-controlled dose escalation study, and a Phase 2 open-label extension study is also active to assess long-term safety and clinical activity.

What clinical trials is Briquilimab in?

Briquilimab is being studied in two clinical trials. The first is NCT06162728, a Phase 1 dose escalation trial in adults with Chronic Spontaneous Urticaria, with 88 participants in the United States and Germany. The second is NCT06736262, a Phase 2 open-label extension study evaluating long-term safety and activity in participants from Jasper-sponsored chronic urticaria trials.

Is Briquilimab the same as any other drug?

Briquilimab is also known by the ChEMBL identifier CHEMBL5095110, which is a database entry for the compound. No other alternative names have been reported for this drug in the available information. It is a distinct investigational agent being developed by Jasper Therapeutics for chronic urticaria indications.