The Development of a Human Model of Respiratory Syncytial Virus Infection
The aim of this study is to understand the immune response (how the body fights infection) to Respiratory Syncytial Virus (RSV). This virus usually causes a simple 'common cold' illness in healthy adults, but can cause wheezing and lung problems in young infants and the elderly. The investigators want to understand why this is, in order to develop vaccines and treatments.
Participants will include 30-40 healthy adults age 18-55 years. Study procedures will include brief medical exams, breathing tests, a diary of symptoms, blood tests, samples of fluid (lavage) and cells from the nose, throat and lungs. All participants will receive the virus via drops in the nose. The duration of the study for all subjects will be 6 weeks.
Studieöversikt
Status
Intervention / Behandling
Detaljerad beskrivning
Bronchiolitis is the commonest cause of hospital admission in infants. It is caused by Respiratory Syncytial Virus(RSV), a virus that causes mild 'common colds' in adults, but can cause lung inflammation and difficulty breathing in infants and the elderly. In 2005, nearly 34 million cases in children <5 years occurred, resulting in 3.4 million hospital admissions,and around 120,000 deaths. There is no vaccine, and some previous vaccines actually made the disease worse.
The investigators have been trying to understand why for 40 years. Advances in immunology have given us a completely different way of looking at inflammation: rather than studying what causes it, the investigators now want to know what regulates it. Much of what the investigators know about how what causes and regulates inflammation has come from studies of animals, however, these do not exactly predict what happens in man.
The investigators therefore plan to infect healthy adult volunteers with RSV, and observe what happens in humans after RSV infection. The investigators will collect samples of blood, fluid and cells from the nose, throat, and lungs, and a diary of symptoms over four weeks. The investigators will analyse the blood, fluid, and cells to determine the important mechanisms that regulate inflammation in human RSV infection.
Studies like this have been conducted previously with no severe side effects. The investigators anticipate that the discoveries made in this research project will help us achieve a better understanding of what causes and regulates inflammation in RSV so that the investigators can learn ways to control it, with the aim of developing vaccines and treatments.
Studietyp
Inskrivning (Faktisk)
Fas
- Inte tillämpbar
Kontakter och platser
Studieorter
-
-
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London, Storbritannien, W2 1PG
- St. Mary's Hospital, Imperial College London, Norfolk Place,
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Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
Inclusion Criteria:
- Healthy persons aged 18 to 55 years, able to give informed consent
Exclusion Criteria:
- Chronic respiratory disease (asthma, COPD, rhinitis, sinusitis) in adulthood
- Inhaled bronchodilator or steroid use within the last 12 months
- Use of any medication or other product (prescription or over-the-counter) for symptoms of rhinitis or nasal congestion within the last 6 months
- Acute upper respiratory infection (URI or sinusitis) in the past 6 weeks
- Smoking in the past 6 months OR >5 pack-year lifetime history
- Subjects with allergic symptoms present at baseline
- Those in close domestic contact (i.e. sharing a household with, caring for, or daily face to face contact) with children under 3 years, the elderly (>65 years), immunosuppressed persons, or those with chronic respiratory disease
- Subjects with known or suspected immune deficiency
- Receipt of systemic glucocorticoids (in a dose ≥ 5 mg prednisone daily or equivalent) within one month, or any other cytotoxic or immunosuppressive drug within 6 months prior to challenge
- History of frequent nose bleeds
- Any significant medical condition or prescribed drug deemed by the study doctor to make the participant unsuitable for the study
- Pregnant or breastfeeding women
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Grundläggande vetenskap
- Tilldelning: Icke-randomiserad
- Interventionsmodell: Enskild gruppuppgift
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
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Experimentell: Viral Challenge
|
Intranasal administration
Andra namn:
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Host response to RSV challenge
Tidsram: Prior to and 0-28 days post challenge
|
The host response to RSV challenge will be assessed daily for 14 days using methods such as symptom diaries, volume of nasal secretions, numbers of inflammatory cells in nasal mucus, and levels of chemical mediators in nasal fluids.
This will be compared with that at baseline and at 28 days post challenge.
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Prior to and 0-28 days post challenge
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Samarbetspartners och utredare
Sponsor
Samarbetspartners
Utredare
- Huvudutredare: Peter Openshaw, Imperial College London
Studieavstämningsdatum
Studera stora datum
Studiestart
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Uppskatta)
Uppdateringar av studier
Senaste uppdatering publicerad (Uppskatta)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- JROSM0127
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