PMID- 23183272 OWN - NLM STAT- MEDLINE DCOM- 20130606 LR - 20181202 IS - 1423-0097 (Electronic) IS - 1018-2438 (Linking) VI - 160 IP - 4 DP - 2013 TI - Fluoroquinolone photodegradation influences specific basophil activation. PG - 377-82 LID - 10.1159/000343023 [doi] AB - Fluoroquinolones (FQs) are photoreactive drugs, but it is not known whether laboratory light exposure can influence the induction of photoproducts and modify in vitro test results. The basophil activation test (BAT) has proven to be useful for evaluating immunoglobulin E (IgE)-mediated hypersensitivity to FQs, with a higher percentage of positive responders with ciprofloxacin (CIP) than with moxifloxacin (MOX). We studied the effect of laboratory light on CIP and MOX degradation, and drug-protein conjugate formation, and its influence on the BAT for evaluating IgE-mediated hypersensitivity to FQs. The results showed an important decrease in fluorescence emission intensity under light compared to dark conditions for MOX, and that BAT positivity was lower in light (17.9%) than in dark (35.7%) conditions. No changes were found for CIP in either fluorescence emission intensity or BAT results (46.4% in both conditions). We can conclude that light exposure is a critical factor in BAT results when photolabile drugs like MOX are used. Therefore, light is important when interpreting in vitro results. CI - Copyright (c) 2012 S. Karger AG, Basel. FAU - Mayorga, Cristobalina AU - Mayorga C AD - Research Laboratory, Carlos Haya Hospital, Malaga, Spain. FAU - Andreu, Inmaculada AU - Andreu I FAU - Aranda, Ana AU - Aranda A FAU - Dona, Inmaculada AU - Dona I FAU - Montanez, M Isabel AU - Montanez MI FAU - Blanca-Lopez, Natalia AU - Blanca-Lopez N FAU - Ariza, Adriana AU - Ariza A FAU - Nuin, Edurne AU - Nuin E FAU - Blanca, Miguel AU - Blanca M FAU - Miranda, Miguel A AU - Miranda MA FAU - Torres, M Jose AU - Torres MJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20121122 PL - Switzerland TA - Int Arch Allergy Immunol JT - International archives of allergy and immunology JID - 9211652 RN - 0 (Aza Compounds) RN - 0 (Fluoroquinolones) RN - 0 (Quinolines) RN - 37341-29-0 (Immunoglobulin E) RN - 5E8K9I0O4U (Ciprofloxacin) RN - U188XYD42P (Moxifloxacin) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Aza Compounds/chemistry MH - Basophils/*immunology MH - Ciprofloxacin/chemistry MH - Fluoroquinolones/*chemistry MH - Humans MH - Hypersensitivity, Immediate/*immunology MH - Immunoglobulin E/immunology MH - Light MH - Middle Aged MH - Moxifloxacin MH - *Photolysis MH - Quinolines/chemistry MH - Young Adult EDAT- 2012/11/28 06:00 MHDA- 2013/06/07 06:00 CRDT- 2012/11/28 06:00 PHST- 2012/03/26 00:00 [received] PHST- 2012/08/27 00:00 [accepted] PHST- 2012/11/28 06:00 [entrez] PHST- 2012/11/28 06:00 [pubmed] PHST- 2013/06/07 06:00 [medline] AID - 000343023 [pii] AID - 10.1159/000343023 [doi] PST - ppublish SO - Int Arch Allergy Immunol. 2013;160(4):377-82. doi: 10.1159/000343023. Epub 2012 Nov 22.