tailieunhanh - Báo cáo y học: " Recombinant phospholipase A1 (Ves v 1) from yellow jacket venom for improved diagnosis of hymenoptera venom hypersensitivit"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Recombinant phospholipase A1 (Ves v 1) from yellow jacket venom for improved diagnosis of hymenoptera venom hypersensitivity. | Seismann et al. Clinical and Molecular Allergy 2010 8 7 http content 8 1 7 RESEARCH CMA CLINICAL AND MOLECULAR ALLERGY Open Access Recombinant phospholipase A1 Ves v 1 from yellow jacket venom for improved diagnosis of hymenoptera venom hypersensitivity Henning Seismann 1 Simon Blank1 Liliana Cifuentes3 Ingke Braren2 Reinhard Bredehorst1 Thomas Grunwald2 Markus Ollert 3 and Edzard Spillner 1 Abstract Background Hymenoptera venoms are known to cause life-threatening IgE-mediated anaphylactic reactions in allergic individuals. Proper diagnosis of hymenoptera venom allergy using venom extracts is severely affected by molecular cross-reactivities. Although non-glycosylated marker allergens would facilitate the identification of the culprit venom the major allergen phospholipase A1 Ves v 1 from yellow jacket venom YJV remained unavailable so far. Methods Expression of Ves v 1 as wild type and enzymatically inactivated mutant and Ves v 5 in insect cells yielded soluble proteins that were purified via affinity chromatography. Functionality of the recombinant allergens was assessed by enzymatic and biophysical analyses as well as basophil activation tests. Diagnostic relevance was addressed by ELISA-based analyses of sera of YJV-sensitized patients. Results Both major allergens Ves v 1 and Ves v 5 could be produced in insect cells in secreted soluble form. The recombinant proteins exhibited their particular biochemical and functional characteristics and were capable for activation of human basophils. Assessment of IgE reactivity of sera of YJV-sensitized and double-sensitized patients emphasised the relevance of Ves v 1 in hymenoptera venom allergy. In contrast to the use of singular molecules the combined use of both molecules enabled a reliable assignment of sensitisation to YJV for more than 90 of doublesensitised patients. Conclusions The recombinant availability of Ves v 1 from yellow jacket venom will contribute to a more detailed .