mRNA Expression as a Biomarker of Omalizumab Response

Summary

Objectives: 1. Determine if mRNA expression could be use as a biomarker to predict and monitor the response to omalizumab in patients with difficult control asthma 2. Identify which genes are switched on and which are switched off by using Omalizumab. Methods: This study is an open label clinical trial, with six patients. The patients will receive Omalizumab according to their age and weight (maximum dose: 375 mg every 15 days) for 4 months. There will be a run-in period of one month, when allergic asthma diagnosis will be confirmed and treatment will be optimized. Patients will be evaluated and will have blood sample collected on 3 occasions: in the beginning, 2 months after baseline and at the end of the study. Blood samples will always be collected one week after the last omalizumab dose. Primary outcome will be RNA expression of 20 genes measured by real time-PCR (high-affinity IgE receptor, IL-4, IL-5, IL-13, gama-IFN, quimokines, Fc epsilon, between others). Secondary outcomes will be ACT, ACQ and spirometry.

Timeline

Start

2012-06

Primary completion

2012-12

Completion

2012-12

Drugs

Indications