Vitamin D Supplementation And Varicella Zoster Virus Vaccine Responsiveness In Older Long-Term Care Residents
|Immunosenescence Shingles||Biological: Varicella Zoster Virus Vaccine (Zostavax)||Phase 1|
|Study Design:||Intervention Model: Single Group Assignment
Masking: No masking
Primary Purpose: Prevention
|Official Title:||Vitamin D Supplementation And Varicella Zoster Virus Vaccine Responsiveness In Older Nursing Home Residents|
- VZV-specific cell mediated immunity, as measured by the interferon-γ ELISPOT assay [ Time Frame: 3 weeks post-vaccination ]
- VZV-gpELISA to measure the VZV-specific antibody concentration [ Time Frame: 3 weeks post-vaccination ]
- VZV-specific effector and memory T cells [ Time Frame: 3 weeks post-vaccination ]
- -specific cell mediated immunity, as measured by the responder cell frequency assay [ Time Frame: 3 weeks post-vaccination ]
|Study Start Date:||November 2010|
|Estimated Study Completion Date:||June 2017|
|Primary Completion Date:||November 2014 (Final data collection date for primary outcome measure)|
Experimental: VZV vaccine
Varicella Zoster Virus vaccine (Zostavax), single dose X 1 injection
All subjects in this trial will receive the VZV vaccine. We will primarily compare immune responses in those that are receiving high dose vs. standard dose vitamin D supplementation and those that have high and low 25-hydroxyvitamin D levels.
Biological: Varicella Zoster Virus Vaccine (Zostavax)
Single 0.65 mL subcutaneous injection of the live, attenuated VZV zoster vaccine (Zostavax; Merck, Whitehouse Station, NJ).
- To determine the increase in VZV-specific cell-mediated immune response from pre-zoster vaccination to 3 weeks post-vaccination in nursing home residents after 4 months of high dose vs. standard dose vitamin D3 supplementation.
- In the same participants as Aim 1, to measure the association between pre-zoster vaccination 25-hydroxyvitamin D [25(OH)D] levels and the increase in VZV-specific cell-mediated immune response from pre- vaccination to 3 weeks post-vaccination.
- Characterize the phenotypic and functional VZV-specific T cell responses to Zostavax, including memory, effector, Th1/Th2, and homing receptor-bearing T cells in the high compared to low ELISPOT responders.
- At baseline, higher serum 25(OH)D levels will be associated with higher levels of VZV-specific cell-mediated immunity (cross-sectional).
- At baseline, higher serum 25(OH)D levels, independent of vitamin D supplementation dose, will be associated with greater increases in VZV-specific cell-mediated immune responses to Zostavax, as measured by the interferon (IFN)-γ ELISPOT assay.
- Compared to standard dose, high dose vitamin D3 supplementation will enhance VZV-specific cell-mediated immune response to vaccination independent of baseline serum 25(OH)D levels.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01262300
|United States, Colorado|
|University of Colorado Denver|
|Aurora, Colorado, United States, 80045|
|Principal Investigator:||Adit A Ginde, MD, MPH||University of Colorado, Denver|