HIV/AIDS Clinical Trial
Official title:
Immunogenicity and Safety of 13-valent Pneumococcal Conjugate Vaccine Among HIV-infected Adults in the Era of Highly Active Antiretroviral Therapy: Analysis Stratified by CD4 T-cell Count
HIV-infected patients are 30- to 100-fold more susceptible to invasive pneumococcal diseases. Pneumococcal vaccination is the best way to decrease the large pneumococcal disease burden, but the optimal timing of vaccination is still unclear. HIV-infected subjects aged ≥ 18 years were recruited and divided into two age-matched groups: group 1 (subjects with CD4 T-cell counts ≥350 cells/µL) and group 2 (subjects with CD4 T-cell counts <350 cells/µL). Multiplex opsonophagocytic killing assay was used to compare immunogenicity after the immunization of 13-valent pneumococcal conjugate vaccine (PCV13).
This single-center, open-label non-randomized clinical trial was conducted at Korea
University Guro Hospital from April 2015 to January 2017. Based on the CD4 T-cell counts at
the time of study enrollment, HIV-infected subjects aged ≥ 18 years were divided into two
groups, group 1 (subjects with CD4 T-cell counts ≥350 cells/µL) and group 2 (subjects with
CD4 T-cell counts <350 cells/µL).
The primary objective of the study was to demonstrate that the immune responses to PCV13
serotypes in Group 2 (CD4 T-cell counts <350 cells/µL) were not inferior to those in Group 1
(CD4 T-cell counts ≥350 cells/µL) at one month after vaccination. In addition, the safety
profiles of PCV13 were compared between two study groups.
HIV-infected subjects aged ≥ 18 years with stable underlying diseases (≥ 4 weeks on HAART)
were eligible for this study. All available subjects with low CD4 T-cell counts (<350
cells/µL, group 2) were recruited, and age/visit day-matched controls with high CD4 T-cell
counts (≥350 cells/µL, group 1) were enrolled. The exclusion criteria were as follows: 1) a
history of pneumococcal infection within the recent five years, 2) previous pneumococcal
vaccination, 3) current opportunistic infections, 4) known immunodeficiency other than HIV
infection and 5) coagulation disorders.
The study was approved by the ethics committee of Korea University Guro Hospital (IRB No.
2014GR0014) and was conducted in accordance with the Declaration of Helsinki and Good
Clinical Practice. Informed consent was taken for all participants before enrollment. Venous
blood samples of 10 mL were collected on day 0 and post-vaccination day 28 ± 7.
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