Effects of Wood Smoke Particles on Influenza-induced Nasal Inflammation in Normal Volunteers

Study Overview
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Brief Summary
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This study is focused on the pathophysiology underlying the association between exposure to particulate pollutants and risk for/response to viral infection. The investigators hypothesize that exposure to wood smoke particles (WSP) enhances influenza virus-induced granulocyte and NK cell activation, via hyaluronic acid-mediated effects on IFNg production. Oxidant stress and viral replication may also be affected. As an NIH funded ViCTER project, the purpose of the study is also to test novel assays of granulocyte activation (Doershuk lab) and lipid mediator activation (Albritton lab) which have not previously been used in this type of research. Healthy, nonsmoking adults age 18-40 years will be recruited. This is a randomized, placebo controlled study comparing NLF granulocyte responses to LAIV administered after either WSP or clean air, in normal healthy volunteers. Subjects receive either WSP or placebo (clean air), followed by a standardized dose of LAIV and serial post-infection sampling of nasal lavage fluids, nasal biopsy and blood

Official Title
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Effects of Wood Smoke Particles on Influenza-induced Nasal Inflammation in Normal Volunteers

Conditions
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Response of Viral Infection to Woodsmoke

Intervention / Treatment
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* Other: wood smoke
* Other: clean air


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Normal lung function, defined as (Knudson 1976/1984 predicted set): FVC > 75 % predicted for gender, ethnicity, age and height; FEV1 >75 % predicted ; FEV1/FVC ratio >0.70 and < 0.90. Oxygen saturation of > 94% Normal blood pressure (Systolic between 140 - 90, Diastolic between 90-60 mm Hg) Symptom Score no greater than 6 (out of a possible 39) for total symptom score On the day of a challenge, body temperature must be no greater than 37.8 degrees, measured orally Exclusion Criteria: A history of significant chronic illnesses (to include diabetes, autoimmune diseases, immunodeficiency state, known ischemic heart disease, chronic respiratory diseases such as chronic obstructive pulmonary disease or asthma, hypertension) Positive pregnancy test within 48 hours of the time of challenge Use of any inhaled substance (for medical or recreational purposes). Nonsmokers must have been abstinent from smoking for the prior 12 months, having not smoked more than 1 pack over the course of the previous year and does not smoke at all 1 week prior to entrance in the study. Receipt of LAIV in the current season History of allergy to eggs Acute, non-chronic, medical conditions, including (but not limited to) pneumonia or bronchitis requiring antibiotics, febrile illnesses, flu-like symptoms must be totally resolved symptomatically for 3 weeks Unspecified illnesses, which in the judgment of the investigator increase the risk associated with the experimental LAIV infection, will be a basis for exclusion. Expected exposure of subject to immunocompromised individuals (who can be infected by LAIV) for the 3 weeks following LAIV inoculation

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Wood smoke<br>The dose of WSP to be used (500 µg/m3 for 2 hours) is based on prior studies which indicate the exposure is well tolerated, and is similar to that found in some indoor exposures in homes heated by wood burning (24-26). The route of administration (breathing air containing WSP at rest, nasally) is intended to mimic natural exposures. | Other: wood smoke<br> <br> |
| Placebo Comparator: clean air<br>Chapel Hill air which has been filtered to remove ambient air pollutants. | Other: clean air<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| IL-13 | Change in IL-13 and ECP in nasal lavage fluids (NLF) compared to pre-virus baseline | 1-21 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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LAIV, Flumist, wood smoke