Hallmarks of Protective Immunity in Sequential Rhinovirus Infections in Humans
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 46
- 试验地点
- 2
- 主要终点
- Virus Infection
研究概览
简要总结
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.
详细描述
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. .
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Single (Participant)
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Subject must be 18-40 years of age
- •Subject must read and sign a copy of the approved Consent Form
- •Subject must have a serum neutralizing antibody titer of ≤1:2 to rhinovirus type 39 and rhinovirus type 16
- •Female subjects must be using an effective birth control method.
- •Total IgE <150 IU/ml.
排除标准
- •Any clinically significant abnormalities of the upper respiratory tract
- •Any clinically significant acute or chronic respiratory illness
- •Any clinically significant bleeding tendency by history
- •Hypertension that requires treatment with antihypertensive medications
- •History of angina or other clinically significant cardiac disease
- •Any upper respiratory infection or allergic rhinitis in the two weeks prior to the start of the study
- •Any medical condition that in the opinion of the Investigator is cause for exclusion from the study
- •Use of any anti-inflammatory (steroids or NSAIDs) or cough/cold preparation in the 1 month prior to the study
- •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
- •Inability to refrain from the use of common cold therapies in the 5 days after each rhinovirus challenge.
- •Participation in any other clinical drug trial in the month prior to the study
- •Female subjects with a positive urine pregnancy screen.
结局指标
主要结局
Virus Infection
时间窗: 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
Number infected after re-challenge with RV16 compared to RV39 as determined by virus isolation in cell culture or viral serology
次要结局
未报告次要终点
研究者
Ronald B Turner
Professor of Pediatrics
University of Virginia