2026-04-29T13:12:15Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/186682024-09-21T23:36:50Zcom_20.500.12105_15322com_20.500.12105_2051col_20.500.12105_16927

00925njm 22002777a 4500 dc Fernandez-Santamaria, Ruben author Bogas, Gador author Montañez, Maria Isabel author Ariza, Adriana author Salas, Maria author Cespedes, Jose Antonio author Labella, Marina author Paris, Juan Luis author Perez-Sanchez, Natalia author Perez-Inestrosa, Ezequiel author Vida, Yolanda author Fernandez, Tahia D author Mayorga, Cristobalina author Torres, Maria Jose author 2022-06-09 Immediate drug hypersensitivity reactions (IDHRs) to clavulanic acid (CLV) have increased in the last decades due to a higher consumption alongside amoxicillin (AX). Due to its chemical instability, diagnostic procedures to evaluate IDHRs to CLV are difficult, and current in vitro assays do not have an optimal sensitivity. The inclusion of the specific metabolites after CLV degradation, which are efficiently recognised by the immune system, could help to improve sensitivity of in vitro tests. Recognition by dendritic cells (DCs) of CLV and the synthetic analogues of two of its hypothesised antigenic determinants (ADs) was evaluated by flow cytometry in 27 allergic patients (AP) and healthy controls (HC). Their ability to trigger the proliferation of T cells was also analysed by flow cytometry. The inclusion of synthetic analogues of CLV ADs, significantly increased the expression of maturation markers on DCs from AP compared to HC. A different recognition pattern could be observed with each AD, and, therefore, the inclusion of both ADs achieves an improved sensitivity. The addition of synthetic ADs analogues increased the proliferative response of CD4+ Th2 compared to the addition of native CLV. The combination of results from both ADs increased the sensitivity of proliferative assays from 19% to 65% with a specificity higher than 90%. Synthetic ADs from CLV are efficiently recognised by DCs with ability to activate CD4+ Th2 cells from AP. The combination of analogues from both ADs, significantly increased the sensitivity of DC maturation and T-cell proliferation compared to native CLV. 10.1111/all.15383 1398-9995 Allergy http://hdl.handle.net/10668/19901 35611454 http://hdl.handle.net/20.500.12105/18668 antigenic determinants clavulanic acid immediate drug hypersensitivity reactions maturation proliferation Synthetic antigenic determinants of clavulanic acid induce dendritic cell maturation and specific T cell proliferation in patients with immediate hypersensitivity reactions.