NCT01262300已完成1 期
Vitamin D Supplementation And Varicella Zoster Virus Vaccine Responsiveness In Older Nursing Home Residents
适应症
干预措施
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 33
- 试验地点
- 1
- 主要终点
- VZV-specific cell mediated immunity, as measured by the interferon-γ ELISPOT assay
研究概览
简要总结
This is an ancillary study to a randomized controlled trial of high dose vitamin D in older long-term care residents (NCT01102374). In this study, a subset of trial subjects will receive the zoster vaccine and the investigators will determine the immunological response to the vaccine in this older, frail population, as well as the association between vitamin D and immunological outcomes.
详细描述
Objectives
- To determine the increase in Varicella-zoster virus (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.
Hypotheses
- 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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 60 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Aged ≥ 60 years;
- •Residing in a long-term care facility;
- •Have not yet received VZV vaccine
排除标准
- •terminal illness (expected survival <6 months);
- •anticipated discharge within 12 months;
- •unable to take whole or crushed tablets;
- •active cancer, except squamous/basal cell carcinoma;
- •severe malnutrition (body mass index <18 kg/m2);
- •current immunosuppressive medications (including corticosteroids);
- •renal failure (eGFR<15 mL/min/1.73m2);
- •currently taking >800 IU/d vitamin D supplementation;
- •history (or strong family history) of kidney stones;
- •history of sarcoidosis or other granulomatous disorders associated with hypercalcemia;
- •elevated baseline hypercalcemia (albumin-adjusted serum calcium >10.5 mg/dL);
- •serum 25 (OH)D level ≥40 ngl/ml at baseline;
- •inability to provide informed consent and no available healthcare proxy;
- •inability of participant or proxy to speak/understand English.
- •previous receipt of the Zostavax (anticipate <10% of trial;
- •known allergy to gelatin, neomycin, or any other component of the vaccine.
研究组 & 干预措施
VZV vaccine
Experimental
Varicella Zoster Virus vaccine (Zostavax), single dose X 1 injection
All subjects in this trial will receive the VZV vaccine. The Investigators 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.
干预措施: Varicella Zoster Virus Vaccine (Zostavax) (Biological)
结局指标
主要结局
VZV-specific cell mediated immunity, as measured by the interferon-γ ELISPOT assay
时间窗: 3 weeks post-vaccination
次要结局
- VZV-gpELISA to measure the VZV-specific antibody concentration(3 weeks post-vaccination)
- VZV-specific effector and memory T cells(3 weeks post-vaccination)
- -specific cell mediated immunity, as measured by the responder cell frequency assay(3 weeks post-vaccination)
研究者
研究点 (1)
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