Comparing Efficacy and Safety of Inhaled SNG001 to Placebo

A Randomised, Double-blind, Placebo-controlled Phase II Study, Comparing the Efficacy and Safety of Inhaled SNG001 to Placebo Administered to Asthmatic Subjects After the Onset of a Respiratory Viral Infection for the Prevention or Attenuation of Asthma Symptoms Caused by Respiratory Viruses

When people with asthma get respiratory virus such as a cold or flu it often increases asthma symptoms. The investigators will test the study medication to find out if it can prevent the virus spreading from the nose to the lungs.

SNG001 contains Interferon-beta that occurs naturally in the body. In this study, SNG001 will be given by a nebuliser.

Study Overview

• Status: Completed
• Conditions: Asthma
• Intervention / Treatment: Drug: Placebo; Drug: Interferon beta 1a

Detailed Description

The study will consist of a Pre-Treatment Phase into which subjects potentially eligible for the Treatment Phase will be recruited. Subjects will remain in the Pre-Treatment Phase until they experience respiratory virus symptoms at which time they will be further screened for eligibility for entry into the Treatment Phase. If eligible, subjects will be randomised 1:1 to receive SNG001 or placebo once daily for 14 days. Doses will be delivered by a CE marked breath actuated nebuliser (I-neb Philips Respironics). Subjects will be assessed for changes in changes in respiratory virus symptoms and asthma symptoms at home using a text message system, and via telephone questionnaire. Lung function will be measured both at home by the subjects (PEFR only) and in the clinic. Efficacy and safety will be monitored until at least 30 days post treatment.

• Study Type: Interventional
• Enrollment (Actual): 300
• Phase: Phase 2

Contacts and Locations

Study Locations

• United Kingdom
  • Hampshire
    • Southampton, Hampshire, United Kingdom, SO16 6YD
      • Southampton University General Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 65 years (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

1. Male or female aged 18 to 65 years of age at the time of screening.

2. Symptoms of asthma for at least 2 years pri or to the Screening Visit, confirmed by a medical history and:

   1. ≥12% and 200mL bronchodilator reversibility at screening or documented in the past, OR,
   2. evidence of bronchial hyper-responsiveness at screening or documented in the past, OR,
   3. a documented hospital admission (including an Accident and Emergency admission) for asthma since the age of 18, OR.
   4. documented evidence that they have attended their GP surgery, out-of-hours clinic (or alternative health care provider) for worsening of asthma symptoms, since the age of 18
3. Must answer "Yes" to the question "Does a cold make your asthma worse?"
4. To have had at least one asthma exacerbation suspected to have been caused by a respiratory virus in the last 24 months which required the use of oral steroids and/or additional treatment with antibiotics on one or more occasion.
5. Must be taking regular inhaled corticosteroids.
6. Pre-bronchodilator FEV1 ≥ 40 % predicted at screening.
7. Post-bronchodilator FEV1 ≥ 50 % predicted at screening.
8. Provide written informed consent.
9. Females of childbearing potential must be using a medically acceptable adequate form of birth control and agree to maintain this usage throughout the duration of and four weeks post the Treatment Phase of the study.
10. Motivation (in the Investigator"s opinion) to complete all study visits, the ability to communicate well with the Investigator and be capable of understanding the nature of the research and its treatment including its risks and benefits.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: RANDOMIZED
• Interventional Model: PARALLEL
• Masking: QUADRUPLE

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
PLACEBO_COMPARATOR: Placebo; Placebo once daily for 14 days	Drug: Placebo; Placebo (excipients of the SNG001 solution only)
EXPERIMENTAL: SNG001	Drug: Interferon beta 1a; SNG001, IFN-β1a solution for inhalation

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
S-ACQ	To evaluate the superiority of inhaled SNG001 compared to placebo administered to asthmatic subjects after the onset of a respiratory viral infection for the prevention or attenuation of asthma symptoms caused by respiratory viruses in the modified intention to treat (mITT) population as measured by change from Baseline to Day 8 in the Shortened-Asthma Control Questionnaire (symptoms plus short-acting β2 agonist. - change from Baseline to Day 8 in the Shortened-Asthma Control Questionnaire	Baseline - Day 8

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Asthma Index	To evaluate the superiority of inhaled SNG001 compared to placebo administered to asthmatic subjects after the onset of a respiratory viral infection for the prevention or attenuation of asthma symptoms caused by respiratory viruses in the mITT population as measured by peak score of the Asthma Index (Sorkness et al, 2008) in the 14 day period following first administration of study drug (measured from 24 hours post first dose to 24 hours post last dose taken).	Day 1-14
S-ACQ	To evaluate the superiority of inhaled SNG001 compared to placebo administered to asthmatic subjects after the onset of a respiratory viral infection for the prevention or attenuation of asthma symptoms caused by respiratory viruses in the per protocol (PP) population as measured by change from Baseline to Day 8 in the Shortened-Asthma Control Questionnaire.	Baseline - Day 8
Asthma Index	To evaluate the superiority of inhaled SNG001 compared to placebo administered to asthmatic subjects after the onset of a respiratory viral infection for the prevention or attenuation of asthma symptoms caused by respiratory viruses in the PP population as measured by peak score of the Asthma Index in the 14 day period following first administration of study drug (measured from 24 hours post first dose to 24 hours post last dose taken).	14 days
Sever Exacerbation	To evaluate the superiority of inhaled SNG001 compared to placebo administered to asthmatic subjects after the onset of a respiratory viral infection for the prevention or attenuation of asthma symptoms caused by respiratory viruses as measured by the proportion of subjects experiencing a severe exacerbation (Appendix 2) in the mITT population during the 14 days following first administration of study drug.	Day 1-14
Lung Function	To compare inhaled SNG001 to placebo administered to asthmatic subjects after the onset of a respiratory viral infection for the prevention or attenuation of decreases in lung function (AUC FEV1 and PEFR) caused by respiratory viruses in the mITT population during the 14 day dosing period.	Day 1-14
Viral Load	To compare the effect of inhaled SNG001 to placebo when administered to asthmatic subjects on viral load on Days 4 and 7 in sputum.	Days 4 and 7
Safety	To evaluate the safety of inhaled SNG001 when administered to asthmatic subjects.	Day 1-14
Concomitant Medications	To compare the frequency of use of concomitant medications in relation to conditions of the respiratory tract during the study Treatment Phase in asthmatic subjects receiving inhaled SNG001 compared to placebo.	Day 1-28
Pharmacokinetic	To gain information on the pharmacokinetic profile of inhaled SNG001 administered to asthmatic subjects during a respiratory virus infection.	Day 1-14
Pharmacodynamic	To gain information on the pharmacodynamic profile of inhaled SNG001 administered to asthmatic subjects during a respiratory virus infection.	Day 1-14

Collaborators and Investigators

• Sponsor: Synairgen Research Ltd.
• Investigators: Principal Investigator: Ratko Djukanovic, MD, DM, FRCP, University of Southampton

Publications and helpful links

General Publications

• Djukanovic R, Harrison T, Johnston SL, Gabbay F, Wark P, Thomson NC, Niven R, Singh D, Reddel HK, Davies DE, Marsden R, Boxall C, Dudley S, Plagnol V, Holgate ST, Monk P; INTERCIA Study Group. The effect of inhaled IFN-beta on worsening of asthma symptoms caused by viral infections. A randomized trial. Am J Respir Crit Care Med. 2014 Jul 15;190(2):145-54. doi: 10.1164/rccm.201312-2235OC.

Study record dates

Study Major Dates

• Study Start: March 1, 2010
• Primary Completion (ACTUAL): October 1, 2011
• Study Completion (ACTUAL): January 1, 2012

Study Registration Dates

• First Submitted: May 17, 2010
• First Submitted That Met QC Criteria: May 18, 2010
• First Posted (ESTIMATE): May 19, 2010

Study Record Updates

• Last Update Posted (ESTIMATE): February 13, 2012
• Last Update Submitted That Met QC Criteria: February 10, 2012
• Last Verified: February 1, 2012

More Information

Terms related to this study

• Keywords: asthma
• Additional Relevant MeSH Terms: Respiratory Tract Diseases; Immune System Diseases; Lung Diseases; Hypersensitivity, Immediate; Bronchial Diseases; Lung Diseases, Obstructive; Respiratory Hypersensitivity; Hypersensitivity; Asthma; Physiological Effects of Drugs; Anti-Infective Agents; Antiviral Agents; Antineoplastic Agents; Immunologic Factors; Adjuvants, Immunologic; Interferons; Interferon beta-1a; Interferon-beta
• Other Study ID Numbers: SG005