Efficacy and Safety Results With Rilzabrutinib, an Oral Bruton Tyrosine Kinase Inhibitor, in Patients With Immune Thrombocytopenia: Phase 2 Part B Study.

Efficacy and Safety Results With Rilzabrutinib, an Oral Bruton Tyrosine Kinase Inhibitor, in Patients With Immune Thrombocytopenia: Phase 2 Part B Study.

Publication date: Mar 01, 2025

Current treatments for persistent or chronic immune thrombocytopenia (ITP) are limited by inadequate response, toxicity, and impaired quality of life. The Bruton tyrosine kinase inhibitor rilzabrutinib was evaluated to further characterize safety and durability of platelet response. LUNA2 Part B is a multicenter, phase 1/2 study in adults with ITP (≥ 3 months duration, platelet count  80 cD7 10/L. Three (12%) patients received rescue medication during main treatment, none in LTE. Clinically meaningful improvements were observed in fatigue and women’s health. With a median treatment duration of 167 days (main treatment), 16 (62%) patients had ≥ 1 treatment-related adverse event (AE), mainly grade 1, including diarrhea (35%), headache (23%), and nausea (15%). There was no treatment-related grade ≥ 2 bleeding/thrombotic events/infections, serious AE, or death. Rilzabrutinib continues to demonstrate durable platelet responses with favorable safety profile in previously treated ITP patients. Trial Registration: NCT03395210, EudraCT 2017-004012-19.

Concepts Keywords
Kinase Administration, Oral
Nct03395210 Adult
Platelet adults
Thrombocytopenia Agammaglobulinaemia Tyrosine Kinase
Agammaglobulinaemia Tyrosine Kinase
Aged
Aged, 80 and over
BTK protein, human
Female
Humans
immune thrombocytopenia
Male
Middle Aged
Platelet Count
platelets
Protein Kinase Inhibitors
Protein Kinase Inhibitors
Purpura, Thrombocytopenic, Idiopathic
Pyrazoles
Pyrazoles
Pyrimidines
Pyrimidines
quality of life
response
Treatment Outcome
Tyrosine Kinase Inhibitors
Tyrosine Kinase Inhibitors

Semantics

Type Source Name
disease MESH Immune Thrombocytopenia
disease IDO quality
disease MESH bleeding
disease MESH infections
disease MESH death

Original Article

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