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A Phase 2 Study to Evaluate the Safety, Tolerability, and Clinical Activity of BLU-808, a Wild Type KIT Inhibitor, in Chronic Inducible Urticaria and Chronic Spontaneous Urticaria

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-520031-33-00
Acronym
BLU-808-1201
Enrollment
57
Registered
2025-08-27
Start date
2025-09-16
Completion date
Unknown
Last updated
2025-09-05

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

Conditions

Chronic Inducible Urticaria and Chronic Spontaneous Urticaria

Brief summary

Part A/B: Overall safety profile as assessed by the type, frequency, severity, and causality of Adverse Events

Detailed description

1. Part A: Cold-induced urticaria: mean change in critical temperature threshold using TempTest from Baseline to the end of Week 12, 2. Part A: Symptomatic dermographism: mean change in total Fric score using FricTest from Baseline to the end of Week 12, 3. Part A: Complete response rate at the end of Week 12, 4. Part B: Mean change from Baseline to the end of Week 12 in patient reported outcome(s), 5. Part B: Complete response rate at the end of Week 12, 6. Part A/B: Absolute and percent change in pharmacodynamic markers from Baseline to the end of Week 12, 7. Part A/B: Population pharmacokinetic parameters including but not limited to AUC, Cmax, Cmin, CL/F, Vc/F, and t1/2

Interventions

DRUGPlacebo matching BLU-808
DRUGtablet

Sponsors

Blueprint Medicines Corp.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Part A/B: Overall safety profile as assessed by the type, frequency, severity, and causality of Adverse Events

Secondary

MeasureTime frame
1. Part A: Cold-induced urticaria: mean change in critical temperature threshold using TempTest from Baseline to the end of Week 12, 2. Part A: Symptomatic dermographism: mean change in total Fric score using FricTest from Baseline to the end of Week 12, 3. Part A: Complete response rate at the end of Week 12, 4. Part B: Mean change from Baseline to the end of Week 12 in patient reported outcome(s), 5. Part B: Complete response rate at the end of Week 12, 6. Part A/B: Absolute and percent change in pharmacodynamic markers from Baseline to the end of Week 12, 7. Part A/B: Population pharmacokinetic parameters including but not limited to AUC, Cmax, Cmin, CL/F, Vc/F, and t1/2

Countries

Denmark, Germany, Italy, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026