Hallmarks of Protective Immunity in Sequential Rhinovirus Infections in Humans

University of Virginia46 enrolled

Overview

The primary objective of this study is to assess the relationship between rhinovirus specific T-cell immunity and the human host response to primary rhinovirus challenge and subsequent secondary challenge with either homologous or heterologous rhinovirus serotypes.

The primary objective of this study is to assess the relationship between RV-specific T-cell immunity and the human host response to primary RV challenge and subsequent secondary challenge with either homologous or heterologous RV serotypes. The overall hypothesis that will be addressed by the mechanistic studies in this proposal is that T helper (Th) and T follicular helper (Tfh) cells directed against conserved RV epitopes expand upon RV exposure and some of these cells persist as stable cross-reactive memory populations capable of displaying lineage-specific protective functions upon re-infection with related or unrelated strains of RV. The human specimens collected in this study will be analyzed with a variety of state-of-the-art techniques to provide an in depth description of T-cell responses to RV infection, and the correlation of these responses with viral infection, antibody responses, and illness. Beyond this objective, by using a systems biology approach, we aim to gain new insight into the role of diverse cell types involved in adaptive immunity to RV. .

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

SINGLE

Enrollment

Conditions

Healthy Volunteers

Interventions

human rhinovirusBIOLOGICAL

human rhinovirus

no interventionOTHER

4 volunteers were not re-challenged and did not participate in the second challenge

Eligibility

Sex: ALLMin age: 18 YearsMax age: 40 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: 1. Subject must be 18-40 years of age 2. Subject must read and sign a copy of the approved Consent Form 3. Subject must have a serum neutralizing antibody titer of ≤1:2 to rhinovirus type 39 and rhinovirus type 16 4. Female subjects must be using an effective birth control method. 5. Total IgE \<150 IU/ml. Exclusion Criteria: 1. Any clinically significant abnormalities of the upper respiratory tract 2. Any clinically significant acute or chronic respiratory illness 3. Any clinically significant bleeding tendency by history 4. Hypertension that requires treatment with antihypertensive medications 5. History of angina or other clinically significant cardiac disease 6. Any upper respiratory infection or allergic rhinitis in the two weeks prior to the start of the study 7. Any medical condition that in the opinion of the Investigator is cause for exclusion from the study 8. Use of any anti-inflammatory (steroids or NSAIDs) or cough/cold preparation in the 1 month prior to the study 9. Regular use of tobacco in the last 6 months (ie. more than 2 days out of 7) or inability to refrain from smoking during the study 10. Inability to refrain from the use of common cold therapies in the 5 days after each rhinovirus challenge. 11. Participation in any other clinical drug trial in the month prior to the study 12. Female subjects with a positive urine pregnancy screen.

Locations (1)

University of Virginia

Charlottesville, Virginia, United States

Outcomes

Primary Outcomes

Virus Infection

Number infected after re-challenge with RV16 compared to RV39 as determined by virus isolation in cell culture or viral serology

Time frame: Volunteers were cultured daily for detection of virus shedding for 5 days after the virus re-challenge and serum was collected for viral serology 4 weeks after virus re-challenge

Data from ClinicalTrials.gov

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