Predicting the Response to Montelukast by Genetic Variation in Asthmatics

May 14, 2021 updated by: Elliot Israel, MD, Brigham and Women's Hospital

Predicting the Bronchoprotective Response to a Leukotriene Modifier by Genetic Polymorphism

The purpose of this study is to examine a specific variation in the genetic code for an enzyme (LTC4 synthase) which plays an important role in the airway inflammation associated with asthma. We hypothesize that asthmatic patients with this variant gene will have a better response to montelukast than patients with the wild type gene, as measured by the ability of montelukast to protect against a hypertonic saline challenge.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Multiple genetic polymorphisms in the leukotriene pathway have been described but their clinical relevance is unclear. A single nucleotide polymorphism in the LTC4 synthase promoter region has been associated with increased LTC4 synthase mRNA and a trend toward improved bronchodilatory response to leukotriene modifiers in severe asthmatics. This study will examine mild to moderate asthmatics with the variant gene and evaluate the bronchoprotective response of montelukast in a double-blind, placebo-controlled cross-over fashion.

Study Type

Interventional

Enrollment

150

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Massachusetts
      • Boston, Massachusetts, United States, 02115
        • Brigham and Women's Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Male and female subjects, age 18-55
  • Clinical history consistent with asthma
  • Mild to moderate asthma as determined by pulmonary function tests--60% or higher of predicted FEV1 for age, sex and race.
  • Response to hypertonic saline, which will be the main outcome variable measured.

Exclusion Criteria:

  • Smokers (total lifetime smoking history>10 pack-years, any in the past year)
  • Pregnant woman-if of childbearing age, not using an acceptable form of birth control.
  • Use of a leukotriene modifier within the past month
  • Use of inhaled or oral steroids within the past month.
  • Emergency room visit for asthma exacerbation within the past 6 weeks.
  • Intubation for asthma exacerbation in the past 10 years.
  • Adverse reaction to inhaled beta-agonists in the past.
  • No recent (past 48 hours) use of anticholinergics, theophylline, antihistamines, pseudoephedrine.
  • Patients will also be asked not to use any short acting beta-agonists for 6 hours and long-acting beta-agonists for 48 hours before their initial visit (when pulmonary function evaluation will be performed).
  • Lung disease other than asthma
  • Significant medical illness other than asthma

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Change in hypertonic saline PD20

Secondary Outcome Measures

Outcome Measure
Improved asthma control
Change in exhaled breath condensate inflammatory markers

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Brigham and Women's Hospital

Collaborators

Merck Sharp & Dohme LLC

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

April 1, 2003

Study Completion (Actual)

December 1, 2006

Study Registration Dates

First Submitted

June 28, 2005

First Submitted That Met QC Criteria

June 28, 2005

First Posted (Estimate)

June 29, 2005

Study Record Updates

Last Update Posted (Actual)

May 18, 2021

Last Update Submitted That Met QC Criteria

May 14, 2021

Last Verified

May 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2002-P-001696

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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