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Differences in Response to the Flu Vaccine Among Adults With HIV and Without HIV in Uganda

2014年4月22日 更新者:Saad B. Omer, PhD、Emory University

Systems Biological Responses to Influenza Vaccination in an HIV-infected and HIV-uninfected Adult Population in Kampala, Uganda

To use a systems biological approach to study the molecular signatures of innate and adaptive responses to vaccination in a HIV infected versus uninfected adult population in Kampala, Uganda.

研究概览

详细说明

This longitudinal, observational cohort study will be conducted at the Makerere University- Johns Hopkins University Research Collaboration, at the Mulago National Referral Hospital complex in Kampala Uganda. The study will consist of 2 groups. One group will consist of 25 healthy HIV uninfected adults and the other arm will consist of 35 HIV infected adults. Within the HIV infected arm there will be two groups, 25 HIV infected adults and 10 long term non-progressors. Vaccinees will receive a primary immunization at day 0, and blood samples will be obtained at days 0, 1, 3, 7, 14, 28 and 100 after immunization.

We will analyze the early molecular signatures (identified by microarray analyses, as well as by FACS analyses of innate immune cells and luminex analyses of cytokines and chemokines) that correlate and predict the later immune responses.

研究类型

介入性

注册 (实际的)

63

阶段

  • 不适用

联系人和位置

本节提供了进行研究的人员的详细联系信息,以及有关进行该研究的地点的信息。

学习地点

      • Kampala、乌干达
        • Makere University- Johns Hopkins University Research Collaboration, at the Mulago National Referral Hospital

参与标准

研究人员寻找符合特定描述的人,称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

18年 及以上 (成人、年长者)

接受健康志愿者

是的

有资格学习的性别

全部

描述

Inclusion Criteria:

  1. For HIV uninfected group

    • Confirmation of HIV-1 infection from medical records
  2. For HIV infected on HAART group

    • Confirmation of HIV-1 infection from medical records
    • Participants must be on HAART for at least 6 months prior to enrollment
    • A CD4 T-cell count available in the last 6 months
    • CD4 T-cell count >350 cells/μL on the eligibility blood specimen
  3. Long-term non-progressor group

    • HIV infected for more than 7 years
    • No evidence of opportunistic infections in the medical records
    • Never received antiretroviral therapy (except anti-retrovirals for prevention of mother-to-infant transmission of HIV)
    • A CD4 T-cell count available in the last 6 months
    • CD4+ T-cell count slop of ≥0 cells/µl blood from entry into the MU-JHU cohort until the most recent available CD4+ T-cell count.

Exclusion Criteria:

  1. Current moderate or severe acute illness, history of fever or temperature ≥37.5oC within 48 hours prior to vaccination (participants can be re-evaluated at a subsequent visit)
  2. History of systemic disease, including: Guillain-Barré Syndrome; known hepatitis B, or hepatitis C infection; cardiac disease; uncontrolled diabetes mellitus (including gestational diabetes); chronic liver condition; clinically significant renal impairment; clinically significant neurological disorders; active TB within the last year; Cancer. This information will be based on self-reporting and (where possible) will be confirmed by hospital medical records
  3. Received immunoglobulin or other blood product within the preceding 3 months or expected receipt of blood products during the 3 months of follow-up
  4. History of anaphylactic hypersensitivity reactions to egg proteins (eggs or egg products), or any other component of the vaccine including traces (formaldehyde, octoxinol 9 (Triton X-100) and neomycin)
  5. History of severe reaction (including hypersensitivity) after receiving any vaccine
  6. Currently pregnant
  7. In the opinion of the study team it would be unsuitable for the study subjects to receive the vaccine or participate in the study.

学习计划

本节提供研究计划的详细信息,包括研究的设计方式和研究的衡量标准。

研究是如何设计的?

设计细节

  • 主要用途:基础科学
  • 分配:非随机化
  • 介入模型:单组作业
  • 屏蔽:无(打开标签)

武器和干预

参与者组/臂
干预/治疗
其他:HIV uninfected adults
25 HIV uninfected adults enrolled at the Mulago National Referral Hospital complex in Kampala, Uganda will receive seasonal trivalent inactivated influenza vaccine (Vaxigrip®).
Administer seasonal trivalent inactivated influenza vaccine (Vaxigrip®) and collect blood specimens at 0, 1, 3, 7, 14, 28 and 100 days following vaccination.
其他:HIV infected adults on HAART
25 HIV infected adults enrolled at the Mulago National Referral Hospital complex in Kampala, Uganda will receive seasonal trivalent inactivated influenza vaccine (Vaxigrip®).
Administer seasonal trivalent inactivated influenza vaccine (Vaxigrip®) and collect blood specimens at 0, 1, 3, 7, 14, 28 and 100 days following vaccination.
其他:HIV-infected long-term non-progressors
10 HIV-infected long-term non-progressor adults enrolled at the Mulago National Referral Hospital complex in Kampala, Uganda will receive seasonal trivalent inactivated influenza vaccine (Vaxigrip®).
Administer seasonal trivalent inactivated influenza vaccine (Vaxigrip®) and collect blood specimens at 0, 1, 3, 7, 14, 28 and 100 days following vaccination.

研究衡量的是什么?

主要结果指标

结果测量
措施说明
大体时间
In group and between group comparison of immune parameters and gene expressions that change significantly following vaccination with the seasonal trivalent influenza vaccine (Vaxigrip®)
大体时间:From baseline (Day 0) to 100 days post vaccination
Immune parameters or gene expressions that change significantly in groups over baseline post immunization and between the study groups will be analyzed. For immune parameters, we will use a two-sided paired t-test. Fold-change will be combined with the test p-value in a selection criterion as appropriate. The tentative selection criterion is p-value ≤ 0.01 and fold change ≥ 3. For the gene/miRNA expression data, we will use the method Significance Analysis of Microarrays (SAM) with paired design to find differentially expressed genes. False discovery rate (FDR) will be used as selection criterion. The tentative selection criterion is FDR ≤ 0.1.
From baseline (Day 0) to 100 days post vaccination
Proportion of subjects achieving 4-fold or greater hemagglutination inhibition (HAI)antibody titer increases.
大体时间:From baseline (Day 0) to 100 days following primary vaccination
Proportion of subjects in different study groups achieving 4-fold or greater hemagglutination inhibition (HAI)antibody titer increases will be tabulated at each time point (Days 0, 1, 3, 7, 14, 28 and 100) and plotted across time. Fisher's exact test will be used to make comparisons between the study groups.
From baseline (Day 0) to 100 days following primary vaccination
Calculating correlation coefficient between the immune parameter and vaccine immunogenicity, as measured by the humoral immune response against seasonal influenza.
大体时间:From baseline (Day 0) to 100 days post vaccination
For immune parameters, we will calculate the correlation coefficient between the immune parameter and vaccine immunogenicity, as measured by the humoral immune response against seasonal influenza. The p-values associated with the correlation coefficients will be used to select immune parameters that are associated with the respective adaptive immune responses. The tentative selection criterion is p-value ≤ 0.01. For gene expression data, we will use the method Significance Analysis of Microarrays (SAM) with quantitative outcome to identify genes that are significantly associated with the immune response. False discovery rate (FDR) will be used as selection criterion. The tentative selection criterion is FDR ≤ 0.1.
From baseline (Day 0) to 100 days post vaccination
Characterization of the gut microbiota to determine compositional differences between HIV-uninfected adults versus HIV-infected adults on HAART versus HIV-infected long-term non-progressors
大体时间:From baseline (Day 0) to Day 28 post vaccination
Gut mircobiota will be characterized to determine what compositional differences exist between HIV-uninfected adults versus HIV-infected adults on HAARt versus HIV-infected long-term non-progressors at baseline (Day 0), Day 7 and Day 28 post vaccination
From baseline (Day 0) to Day 28 post vaccination
Correlation between microbiata status and the quality of immune response elicited in vaccinated individuals
大体时间:From baseline (Day 0) to Day 28 post vaccination
Determine whether the status of the microbita correlates with the quality of immune responses elicited in vaccinated individuals
From baseline (Day 0) to Day 28 post vaccination

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

调查人员

  • 首席研究员:Saad B Omer, MBBS,MPH,PhD、Emory Unversity

出版物和有用的链接

负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。

一般刊物

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查,以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始

2013年6月1日

初级完成 (实际的)

2013年12月1日

研究完成 (实际的)

2014年3月1日

研究注册日期

首次提交

2013年2月25日

首先提交符合 QC 标准的

2013年8月4日

首次发布 (估计)

2013年8月6日

研究记录更新

最后更新发布 (估计)

2014年4月23日

上次提交的符合 QC 标准的更新

2014年4月22日

最后验证

2014年4月1日

更多信息

此信息直接从 clinicaltrials.gov 网站检索,没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求,请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改,我们的网站上也会自动更新.

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