Intanza (®) 9 µg intradermal seasonal influenza vaccine for adults 18 to 59 years of age.
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ABSTRACT:
SUBMITTER: Leroux-Roels I
PROVIDER: S-EPMC3667924 | biostudies-literature | 2013 Jan
REPOSITORIES: biostudies-literature
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Intanza (®) 9 µg intradermal seasonal influenza vaccine for adults 18 to 59 years of age.
Leroux-Roels Isabel I Weber Françoise F
Human vaccines & immunotherapeutics 20130101 1
Seasonal influenza in healthy working-age adults accounts for a substantial part of the socioeconomic burden of this disease. Intanza® 9 µg (sanofi pasteur) is a microneedle-delivered intradermal trivalent inactivated influenza vaccine approved in 2009 for the prevention of seasonal influenza in adults 18 to 59 years of age. The microneedle system reliably and reproducibly delivers the vaccine to the dermis. Clinical studies show that Intanza 9 µg is as immunogenic and as well tolerated in worki ...[more]
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Project description:Seasonal influenza vaccine formulations must be updated annually to correspond to the influenza viruses in circulation. This was an uncontrolled, open-label, multi-center phase IV study conducted in Belgium to comply with interim European Medicines Agency (EMA) guidelines for rapidly evaluating the safety of newly formulated seasonal influenza vaccines. Adult volunteers received one dose of the 2014-2015 Northern Hemisphere formulation of licensed intradermal trivalent influenza vaccine at either the standard dose (9µg hemagglutinin/strain for 18-59 year-olds) or the high dose (15µg hemagglutinin/strain for ≥ 60 year-olds). Vaccinees recorded their solicited reactions and unsolicited adverse events for 7 d after vaccination. Solicited reaction frequencies were compared to historical reference values obtained from previous clinical trials to determine if the new formulations were excessively reactogenic or allergenic. A total of 210 participants (105 per age group) were included and vaccinated in October 2014. In both groups, pain, erythema, and pruritus were the most common solicited injection site reactions, and headache and myalgia were the most common solicited systemic reactions. Although the frequencies of shivering in 18-59 year-olds and malaise in ≥ 60 year-olds were higher than historical reference values, they were not considered indicative of excessive reactogenicity because almost all of these reactions were mild. The study design was endorsed by the EMA and permitted the reactogenicity of both vaccine formulations to be assessed within one month by collecting adverse events for 7 d. Both formulations exhibited acceptable safety profiles although this should be confirmed through forthcoming enhanced post-marketing safety surveillance systems.
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Project description:The skin plays a crucial role in host defences against microbial attack and the innate cells must provide the immune system with sufficient information to organize these defences. This unique feature makes the skin a promising site for vaccine administration. Although cellular innate immune events during vaccination have been widely studied, initial events remain poorly understood. Our aim is to determine molecular biomarkers of skin innate reaction after intradermal (i.d.) immunization. Using an ex vivo human explant model from healthy donors, we investigated by NanoLC-MS/MS analysis and MALDI-MSI imaging, to detect innate molecular events (lipids, metabolites, proteins) few hours after i.d. administration of seasonal trivalent influenza vaccine (TIV). This multimodel approach allowed to identify early molecules differentially expressed in dermal and epidermal layers at 4 and 18 h after TIV immunization compared with control PBS. In the dermis, the most relevant network of proteins upregulated were related to cell-to-cell signaling and cell trafficking. The molecular signatures detected were associated with chemokines such as CXCL8, a chemoattractant of neutrophils. In the epidermis, the most relevant networks were associated with activation of antigen-presenting cells and related to CXCL10. Our study proposes a novel step-forward approach to identify biomarkers of skin innate reaction.
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