The Effect of Xolair ® (Omalizumab) in Mastocytosis Patients — XOLMA  

Mastocytosis Clinical Trial

Official title: The Effect of Xolair ® (Omalizumab) in Mastocytosis Patients Prospective Double-blind, Placebo-controlled, Multicentre Study, XOLMA-Study

Status Completed

Clinical Trial Summary

Patients with mastocytosis often suffer from associated symptoms such as nausea, vertigo, fatigue, urticaria, abdominal cramps, diarrhea or hypotension due to release of mediators by mast cells. These patients have also an increased frequency of anaphylactic/anaphylactoid reactions due to allergens such as hymenoptera or nonspecific stimuli such as contrast media, local anesthetics or analgesics. In addition, there is increased osteoporosis in mastocytosis patients due to the activity of mast cell mediators on osteoblasts and osteoclasts. Symptoms of mastocytosis respond poorly to treatment with antihistamines or other antiallergic drugs. There is currently no specific treatment for this disease with the exception of rare cases. There are, however, some case reports suggesting that omalizumab might decrease symptoms including hypotensive events.

The aim of the study is to investigate whether patients suffering from mastocytosis benefit from a 6 month course of omalizumab with regard to symptoms and quality of life and whether the applied in vitro and in vivo monitoring tools represent useful surrogate markers for the efficacy of omalizumab in patients with mastocytosis.

• Trial with medicinal product

Clinical Trial Description

The study will take place as double-blind placebo controlled study. After a first a run-period of 2 months for all participants randomization (1:1) in two group will take place:

Group A: With omalizumab treatment for 6 months; dosage and administration schedule according to body weight and total IgE level (1/2 of the patients). Group B: Placebo (1/2 of the patients). After 4 months of treatment in both groups patients are encouraged to stop all drugs given to reduce mast cell related effects, mainly antihistaminics . In case that disturbing symptoms are reoccurring patients are allowed to restart these drugs. The evaluation will take place after 5 months of treatment.

Finally, a follow up visit 1 and 4 months after the study will take place. ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Mastocytosis

• NCT number: NCT01333293
• Study type: Interventional
• Source: University of Zurich
• Status: Completed
• Phase: Phase 2/Phase 3
• Start date: September 2011
• Completion date: January 2016