HIV Clinical Trial
Official title:
Systems Biological Responses to Influenza Vaccination in an HIV-infected and HIV-uninfected Adult Population in Kampala, Uganda
Verified date | April 2014 |
Source | Emory University |
Contact | n/a |
Is FDA regulated | No |
Health authority | United States: Institutional Review Board |
Study type | Interventional |
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.
Status | Completed |
Enrollment | 63 |
Est. completion date | March 2014 |
Est. primary completion date | December 2013 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Both |
Age group | 18 Years and older |
Eligibility |
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. |
Allocation: Non-Randomized, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science
Country | Name | City | State |
---|---|---|---|
Uganda | Makere University- Johns Hopkins University Research Collaboration, at the Mulago National Referral Hospital | Kampala |
Lead Sponsor | Collaborator |
---|---|
Emory University | Makerere University |
Uganda,
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* Note: There are 12 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | In group and between group comparison of immune parameters and gene expressions that change significantly following vaccination with the seasonal trivalent influenza vaccine (Vaxigrip®) | 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 | No |
Primary | Proportion of subjects achieving 4-fold or greater hemagglutination inhibition (HAI)antibody titer increases. | 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 | No |
Primary | Calculating correlation coefficient between the immune parameter and vaccine immunogenicity, as measured by the humoral immune response against seasonal influenza. | 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 | No |
Primary | 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 | 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 | No |
Primary | Correlation between microbiata status and the quality of immune response elicited in vaccinated individuals | 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 | No |
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