Low Vitamin D3 (VD3) levels have been reported to be associated with the risk of allergic diseases like asthma. VD3 has been demonstrated in vitro, ex vivo and in animal models to program the immune system towards anti-inflammatory immune responses. VD3 co-administered with allergen may be a promising adjuvant to improve the onset and efficacy of allergen immunotherapy (AIT). A clinical trial will be performed to compare the immune effects, the tolerability and safety of multiple doses of aVD3 analogue (registered for the intravenous route) administered by the subcutaneous (s.c.) route in subjects with allergic rhinitis and healthy controls. The overall aim is to provide additional (in vivo) support for the use of VD3 as an adjuvant in allergen-specific immunotherapy, on top of the existing pre-clinical evidence demonstrating that antigen-presenting cells educate the adaptive immune system towards an anti-inflammatory response when allergen is seen in the presence of VD3.
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change in IL-10 production from baseline
Timeframe: baseline and 4 weeks of treatment
change in IL-10 production from baseline
Timeframe: baseline and follow-up visit (between 5-7 weeks)