Abstract
The aim of this study was to assess autoimmune response following annual influenza vaccination in apparently healthy adults, staff at a children's hospital. 92 healthy adult subjects were tested for autoantibodies including antinuclear antibodies (ANA), anti-extractable nuclear antigen antibodies (anti-ENA), antiphospholipid antibodies (aPL), namely anticardiolipin antibodies (aCL), anti-beta2-glycoprotein I antibodies (aβ2-GPI) and lupus anticoagulant (LA). Blood samples were taken from each participant before annual influenza vaccination, one month and six months after vaccination. Before influenza vaccination 26% of participants were positive for ANA, 1% for anti-ENA, 16% for aCL, 7% for aβ2-GPI and 2% for LA. One month after influenza vaccination 76% of participants showed no change in autoantibodies titres. Six months after influenza vaccination 74% of participants showed no change in autoantibodies titres. Overall, there was no statistically significant difference in the percentage of positive ANA, aCL, aβ2-GPI and LA before and 6 months after the vaccination. Five participants developed autoantibodies 6 months after the vaccination and one who was initially low positive for ANA became highly positive (1:320). Eleven participants had only transiently increased autoantibodies. Persistently positive or progressively increased levels of autoantibodies during 6 months' follow up were observed in 6 persons (7%). Our study showed a high percentage of positive autoantibody testing among healthy adult staff at a children's hospital. There was no statistically significant difference in the percentage of positive autoantibodies before and after influenza vaccination. However, our study clearly demonstrated induction of autoantibodies production in selected subjects.
Highlights
15th Paediatric Rheumatology European Society (PreS) Congress Wietse Kuis, Patricia Woo, Angelo Ravelli, Hermann Girschick, Michaël Hofer, Johannes Roth, Rotraud K Saurenmann, Alberto Martini, Pavla Dolezova, Janjaap van der Net, Pierre Quartier, Lucy Wedderburn and Jan Scott Meeting abstracts – A single PDF containing all abstracts in this Supplement is available here.
92 healthy adult subjects were tested for autoantibodies including antinuclear antibodies (ANA), anti-extractable nuclear antigen antibodies, antiphospholipid antibodies, namely anticardiolipin antibodies, anti-beta2-glycoprotein I antibodies and lupus anticoagulant (LA)
Before influenza vaccination 26% of participants were positive for ANA, 1% for anti-ENA, 16% for aCL, 7% for aβ2-GPI and 2% for LA
Summary
15th Paediatric Rheumatology European Society (PreS) Congress Wietse Kuis, Patricia Woo, Angelo Ravelli, Hermann Girschick, Michaël Hofer, Johannes Roth, Rotraud K Saurenmann, Alberto Martini, Pavla Dolezova, Janjaap van der Net, Pierre Quartier, Lucy Wedderburn and Jan Scott Meeting abstracts – A single PDF containing all abstracts in this Supplement is available here. . Autoimmune response following influenza vaccination N Toplak*1, T Kveder2, A Trampus-Bakija3 and T Avcin1 Address: 1Department of Allergology, Rheumatology and Clinical immunology, University Children's Hospital, University Medical Centre, Ljubljana, Slovenia, 2Department of Rheumatology, Laboratory for Immunology, University Medical Centre, Ljubljana, Slovenia and 33 Unit of Special Laboratory Diagnostics, University Children's Hospital, University Medical Centre, Ljubljana, Slovenia
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