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Paris JL, Monío C, Pérez-Moreno AM, Jurado-Escobar R, Bogas G, Fernández TD, Montañez MI, Mayorga C, Torres MJ. Influence of Pore Size in Protein G'-Grafted Mesoporous Silica Nanoparticles as a Serum Pretreatment System for In Vitro Allergy Diagnosis. Adv Healthc Mater 2023:e2203321. [PMID: 36847336 DOI: 10.1002/adhm.202203321] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/28/2023] [Indexed: 03/01/2023]
Abstract
Particles with the capacity to bind to immunoglobulin G (IgG) can be used for the purification of IgG or to process clinical samples for diagnostic purposes. For in vitro allergy diagnosis, the high IgG levels in serum can interfere with the detection of allergen-specific IgE, the main diagnostic biomarker. Although commercially available, current materials present a low IgG capture capacity at large IgG concentrations or require complex protocols, preventing their use in the clinic. In this work, mesoporous silica nanoparticles are prepared with different pore sizes, to which IgG-binding protein G' is grafted. It is found that for one particular optimal pore size, the IgG capture capacity of the material is greatly enhanced. The capacity of this material to efficiently capture human IgG in a selective way (compared to IgE) is demonstrated in both solutions of known IgG concentrations as well as in complex samples, like serum, from healthy controls and allergic patients using a simple and fast incubation protocol. Interestingly, IgG removal using the best-performing material enhances in vitro IgE detection in sera from patients allergic to amoxicillin. These results highlight the great translation potential of this strategy to the clinic in the context of in vitro allergy diagnosis.
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Affiliation(s)
- Juan L Paris
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain
| | - Cristina Monío
- Facultad de Ciencias, Universidad de Málaga, Málaga, 29010, Spain
| | - Ana M Pérez-Moreno
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain
| | - Raquel Jurado-Escobar
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain
| | - Gador Bogas
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain.,Allergy Unit, Hospital Regional Universitario de Málaga-HRUM, Málaga, 29009, Spain
| | - Tahía D Fernández
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain.,Departamento de Biología Celular Genética y Fisiología, Facultad de Ciencias, Universidad de Málaga, Málaga, 29010, Spain
| | - María I Montañez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain.,Departamento de Química Orgánica, Universidad de Málaga-UMA, Málaga, 29010, Spain
| | - Cristobalina Mayorga
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain.,Allergy Unit, Hospital Regional Universitario de Málaga-HRUM, Málaga, 29009, Spain
| | - María J Torres
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND. RICORS "Enfermedades inflamatorias", Málaga, 29590, Spain.,Allergy Unit, Hospital Regional Universitario de Málaga-HRUM, Málaga, 29009, Spain.,Departmento de Medicina, Universidad de Málaga-UMA, Málaga, 29010, Spain
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2
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González-Morena JM, Sánchez-Gómez FJ, Vida Y, Pérez-Inestrosa E, Salas M, Montañez MI, Altomare A, Aldini G, Pajares MA, Pérez-Sala D. Amoxicillin Haptenation of α-Enolase is Modulated by Active Site Occupancy and Acetylation. Front Pharmacol 2022; 12:807742. [PMID: 35095517 PMCID: PMC8793629 DOI: 10.3389/fphar.2021.807742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/20/2021] [Indexed: 11/13/2022] Open
Abstract
Allergic reactions to antibiotics are a major concern in the clinic. ß-lactam antibiotics are the class most frequently reported to cause hypersensitivity reactions. One of the mechanisms involved in this outcome is the modification of proteins by covalent binding of the drug (haptenation). Hence, interest in identifying the corresponding serum and cellular protein targets arises. Importantly, haptenation susceptibility and extent can be modulated by the context, including factors affecting protein conformation or the occurrence of other posttranslational modifications. We previously identified the glycolytic enzyme α-enolase as a target for haptenation by amoxicillin, both in cells and in the extracellular milieu. Here, we performed an in vitro study to analyze amoxicillin haptenation of α-enolase using gel-based and activity assays. Moreover, the possible interplay or interference between amoxicillin haptenation and acetylation of α-enolase was studied in 1D- and 2D-gels that showed decreased haptenation and displacement of the haptenation signal to lower pI spots after chemical acetylation of the protein, respectively. In addition, the peptide containing lysine 239 was identified by mass spectrometry as the amoxicillin target sequence on α-enolase, thus suggesting a selective haptenation under our conditions. The putative amoxicillin binding site and the surrounding interactions were investigated using the α-enolase crystal structure and molecular docking. Altogether, the results obtained provide the basis for the design of novel diagnostic tools or approaches in the study of amoxicillin-induced allergic reactions.
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Affiliation(s)
- Juan M González-Morena
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Francisco J Sánchez-Gómez
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Yolanda Vida
- Dpto. Química Orgánica, Universidad de Málaga-IBIMA, Málaga, Spain.,Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Parque Tecnológico de Andalucía, Málaga, Spain
| | - Ezequiel Pérez-Inestrosa
- Dpto. Química Orgánica, Universidad de Málaga-IBIMA, Málaga, Spain.,Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Parque Tecnológico de Andalucía, Málaga, Spain
| | - María Salas
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Allergy Unit, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - María I Montañez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Andalusian Centre for Nanomedicine Biotechnology-BIONAND, Parque Tecnológico de Andalucía, Málaga, Spain
| | - Alessandra Altomare
- Department of Scienze Farmaceutiche, Universita degli Studi di Milano, Milan, Italy
| | - Giancarlo Aldini
- Department of Scienze Farmaceutiche, Universita degli Studi di Milano, Milan, Italy
| | - María A Pajares
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Dolores Pérez-Sala
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
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3
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Tesfaye A, Rodríguez‐Nogales A, Benedé S, Fernández TD, Paris JL, Rodriguez MJ, Jiménez‐Sánchez IM, Bogas G, Mayorga C, Torres MJ, Montañez MI. Nanoarchitectures for efficient IgE cross-linking on effector cells to study amoxicillin allergy. Allergy 2021; 76:3183-3193. [PMID: 33784407 PMCID: PMC8518075 DOI: 10.1111/all.14834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/28/2021] [Accepted: 03/14/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Amoxicillin (AX) is nowadays the β-lactam that more frequently induces immediate allergic reactions. Nevertheless, diagnosis of AX allergy is occasionally challenging due to risky in vivo tests and non-optimal sensitivity of in vitro tests. AX requires protein haptenation to form multivalent conjugates with increased size to be immunogenic. Knowing adduct structural features for promoting effector cell activation would help to improve in vitro tests. We aimed to identify the optimal structural requirement in specific cellular degranulation to AX using well-precised nanoarchitectures of different lengths. METHOD We constructed eight Bidendron Antigens (BiAns) based on polyethylene glycol (PEG) linkers of different lengths (600-12,000 Da), end-coupled with polyamidoamine dendrons that were terminally multi-functionalized with amoxicilloyl (AXO). In vitro IgE recognition was studied by competitive radioallergosorbent test (RAST) and antibody-nanoarchitecture complexes by transmission electron microscopy (TEM). Their allergenic activity was evaluated using bone marrow-derived mast cells (MCs) passively sensitized with mouse monoclonal IgE against AX and humanized RBL-2H3 cells sensitized with polyclonal antibodies from sera of AX-allergic patients. RESULTS All BiAns were recognized by AX-sIgE. Dose-dependent activation responses were observed in both cellular assays, only with longer structures, containing spacers in the range of PEG 6000-12,000 Da. Consistently, greater proportion of immunocomplexes and number of antibodies per complex for longer BiAns were visualized by TEM. CONCLUSIONS BiAns are valuable platforms to study the mechanism of effector cell activation. These nanomolecular tools have demonstrated the importance of the adduct size to promote effector cell activation in AX allergy, which will impact for improving in vitro diagnostics.
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Affiliation(s)
- Amene Tesfaye
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Alba Rodríguez‐Nogales
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Sara Benedé
- Instituto de Investigación en Ciencias de la Alimentación (CIALCSIC‐UAM)MadridSpain
| | - Tahía D. Fernández
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Departamento de Biología Celular Genética y FisiologíaFacultad de CienciasUniversidad de MálagaMálagaSpain
| | - Juan L. Paris
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Maria J. Rodriguez
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Isabel M. Jiménez‐Sánchez
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Gador Bogas
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Allergy UnitHospital Regional Universitario de MálagaMálagaSpain
| | - Cristobalina Mayorga
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Allergy UnitHospital Regional Universitario de MálagaMálagaSpain
| | - María J. Torres
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Allergy UnitHospital Regional Universitario de MálagaMálagaSpain
- Departamento de MedicinaFacultad de MedicinaUniversidad de MálagaMálagaSpain
| | - María I. Montañez
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
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4
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Bogas G, Doña I, Dionicio J, Fernández TD, Mayorga C, Boteanu C, Montañez MI, Al-Ahmad M, Rondón C, Moreno E, Laguna JJ, Torres MJ. Diagnostic Approach of Hypersensitivity Reactions to Cefazolin in a Large Prospective Cohort. J Allergy Clin Immunol Pract 2021; 9:4421-4430.e4. [PMID: 34464750 DOI: 10.1016/j.jaip.2021.08.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 07/29/2021] [Accepted: 08/11/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND Cefazolin is a common trigger of perioperative anaphylaxis. The diagnostic approach is controversial because the optimal concentration for skin testing is uncertain, drug provocation tests (DPTs) are contraindicated in severe reactions, and in vitro tests are not thoroughly validated. OBJECTIVE We aimed to characterize a large number of patients reporting cefazolin allergic reactions and to analyze the diagnostic role of in vivo and in vitro tests. METHODS We prospectively evaluated patients with suspicion for allergic reactions to cefazolin by clinical history, skin tests (STs), and, if negative, DPT. In a subgroup of patients, basophil activation test (BAT) and radioallergosorbent test were done before allergologic workup was performed and the final diagnosis was achieved. RESULTS We evaluated 184 patients, 76 of whom were confirmed as allergic (41.3%), 90 were nonallergic (48.9%), and 18 were nonconfirmed (9.8%). All patients reporting anaphylactic shock and most reporting anaphylaxis were confirmed to be allergic (P < .001). Forty allergic patients (52.6%) were confirmed by STs, 22 by DPT (28.9%), and 14 by clinical history (18.4%). All subjects manifesting exanthemas and pruritus were nonallergic. The BAT sensitivity was 66.7% when CD63 and CD203c were combined as activation markers. Six of 8 patients with negative STs and positive DPT had a positive BAT. CONCLUSIONS Patients allergic to cefazolin often reported severe immediate-type reactions. Skin tests enabled a diagnosis in half of patients when using cefazolin at 20 mg/mL. Unfortunately, DPT could not be performed in all patients owing to reaction severity, which makes BAT a promising diagnostic tool. Further research is needed to clarify the underlying mechanisms, especially in severe reactions.
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Affiliation(s)
- Gador Bogas
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA-ARADyAL, Málaga, Spain; Allergy Unit, Hospital Regional Universitario de Málaga-ARADyAL, Málaga, Spain
| | - Inmaculada Doña
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA-ARADyAL, Málaga, Spain; Allergy Unit, Hospital Regional Universitario de Málaga-ARADyAL, Málaga, Spain
| | | | - Tahia D Fernández
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA-ARADyAL, Málaga, Spain; Department of Cell Biology, Genetics, and Physiology, Universidad de Málaga, Málaga, Spain
| | - Cristobalina Mayorga
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA-ARADyAL, Málaga, Spain; Allergy Unit, Hospital Regional Universitario de Málaga-ARADyAL, Málaga, Spain; Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
| | - Cosmin Boteanu
- Allergy Section, Hospital Universitario Puerta de Hierro, Majadahonda, Spain
| | - María I Montañez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA-ARADyAL, Málaga, Spain; Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
| | - Mona Al-Ahmad
- Al Rashed Allergy Centre, Ministry of Health, Kuwait; Microbiology Department, Faculty of Medicine, Kuwait University, Kuwait
| | - Carmen Rondón
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA-ARADyAL, Málaga, Spain; Allergy Unit, Hospital Regional Universitario de Málaga-ARADyAL, Málaga, Spain
| | - Esther Moreno
- Allergy Service, University Hospital of Salamanca., Salamanca, Spain
| | - Jose J Laguna
- Allergy Unit, Hospital de la Cruz Roja, Madrid, Spain; Faculty of Medicine, Universidad Alfonso X El Sabio, Madrid, Spain
| | - Maria J Torres
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA-ARADyAL, Málaga, Spain; Allergy Unit, Hospital de la Cruz Roja, Madrid, Spain; Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain; Department of Medicine, Universidad de Málaga, Málaga, Spain.
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5
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Martín-Serrano Á, Gonzalez-Morena JM, Barbero N, Ariza A, Sánchez Gómez FJ, Pérez-Inestrosa E, Pérez-Sala D, Torres MJ, Montañez MI. Biotin-Labelled Clavulanic Acid to Identify Proteins Target for Haptenation in Serum: Implications in Allergy Studies. Front Pharmacol 2021; 11:594755. [PMID: 33442385 PMCID: PMC7797785 DOI: 10.3389/fphar.2020.594755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/06/2020] [Indexed: 12/19/2022] Open
Abstract
Clavulanic acid (CLV) and amoxicillin, frequently administered in combination, can be independently involved in allergic reactions. Protein haptenation with β-lactams is considered necessary to activate the immune system. The aim of this study was to assess the suitability of biotinylated analogues of CLV as probes to study protein haptenation by this β-lactam. Two synthetic approaches afforded the labeling of CLV through esterification of its carboxylic group with a biotin moiety, via either direct binding (CLV-B) or tetraethylenglycol linker (CLV-TEG-B). The second analogue offered advantages as solubility in aqueous solution and potential lower steric hindrance for both intended interactions, with the protein and with avidin. NMR reactivity studies showed that both CLV and CLV-TEG-B reacts through β-lactam ring opening by aliphatic amino nitrogen, however with different stability of resulting conjugates. Unlike CLV conjugates, that promoted the decomposition of clavulanate fragment, the conjugates obtained with the CLV-TEG-B remained linked, as a whole structure including biotin, to nucleophile and showed a better stability. This was a desired key feature to allow CLV-TEG-B conjugated protein detection at great sensitivity. We have used biotin detection and mass spectrometry (MS) to detect the haptenation of human serum albumin (HSA) and human serum proteins. MS of conjugates showed that HSA could be modified by CLV-TEG-B. Remarkably, HSA preincubation with CLV excess only reduced moderately the incorporation of CLV-TEG-B, which could be attributed to different protein interferences. The CLV-TEG-B fragment with opened β-lactam was detected bound to the 404-430HSA peptide of the treated protein. Incubation of human serum with CLV-TEG-B resulted in the haptenation of several proteins that were identified by 2D-electrophoresis and peptide mass fingerprinting as HSA, haptoglobin, and heavy and light chains of immunoglobulins. Taken together, our results show that tagged-CLV keeps some of the CLV features. Moreover, although we observe a different behavior in the conjugate stability and in the site of protein modification, the similar reactivity indicates that it could constitute a valuable tool to identify protein targets for haptenation by CLV with high sensitivity to get insights into the activation of the immune system by CLV and mechanisms involved in β-lactams allergy.
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Affiliation(s)
- Ángela Martín-Serrano
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain.,Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Málaga, Spain
| | - Juan M Gonzalez-Morena
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Nekane Barbero
- Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Málaga, Spain.,Department Química Orgánica, Universidad de Málaga-IBIMA, Málaga, Spain
| | - Adriana Ariza
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
| | - Francisco J Sánchez Gómez
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Ezequiel Pérez-Inestrosa
- Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Málaga, Spain.,Department Química Orgánica, Universidad de Málaga-IBIMA, Málaga, Spain
| | - Dolores Pérez-Sala
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Maria J Torres
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain.,Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Málaga, Spain.,Allergy Unit, Hospital Regional Universitario de Málaga, Málaga, Spain.,Department of Medicina, Universidad de Málaga, Málaga, Spain
| | - María I Montañez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain.,Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Málaga, Spain
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6
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Pajares MA, Zimmerman T, Sánchez-Gómez FJ, Ariza A, Torres MJ, Blanca M, Cañada FJ, Montañez MI, Pérez-Sala D. Amoxicillin Inactivation by Thiol-Catalyzed Cyclization Reduces Protein Haptenation and Antibacterial Potency. Front Pharmacol 2020; 11:189. [PMID: 32210804 PMCID: PMC7065267 DOI: 10.3389/fphar.2020.00189] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 02/10/2020] [Indexed: 11/25/2022] Open
Abstract
Serum and cellular proteins are targets for the formation of adducts with the β-lactam antibiotic amoxicillin. This process could be important for the development of adverse, and in particular, allergic reactions to this antibiotic. In studies exploring protein haptenation by amoxicillin, we observed that reducing agents influenced the extent of amoxicillin-protein adducts formation. Consequently, we show that several thiol-containing compounds, including dithiothreitol, N-acetyl-L-cysteine, and glutathione, perform a nucleophilic attack on the amoxicillin molecule that is followed by an internal rearrangement leading to amoxicillin diketopiperazine, a known amoxicillin metabolite with residual activity. Increased diketopiperazine conversion is also observed with human serum albumin but not with L-cysteine, which mainly forms the amoxicilloyl amide. The effect of thiols is catalytic and can render complete amoxicillin conversion. Interestingly, this process is dependent on the presence of an amino group in the antibiotic lateral chain, as in amoxicillin and ampicillin. Furthermore, it does not occur for other β-lactam antibiotics, including cefaclor or benzylpenicillin. Biological consequences of thiol-mediated amoxicillin transformation are exemplified by a reduced bacteriostatic action and a lower capacity of thiol-treated amoxicillin to form protein adducts. Finally, modulation of the intracellular redox status through inhibition of glutathione synthesis influenced the extent of amoxicillin adduct formation with cellular proteins. These results open novel perspectives for the understanding of amoxicillin metabolism and actions, including the formation of adducts involved in allergic reactions.
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Affiliation(s)
- María A Pajares
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - Tahl Zimmerman
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - Francisco J Sánchez-Gómez
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - Adriana Ariza
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Hospital Civil, Málaga, Spain.,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
| | - María J Torres
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Hospital Civil, Málaga, Spain.,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain.,Allergy Unit, Hospital Regional Universitario de Málaga, Hospital Civil, Málaga, Spain
| | - Miguel Blanca
- Servicio de Alergología, Hospital Infanta Leonor, Madrid, Spain
| | - F Javier Cañada
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - María I Montañez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Hospital Civil, Málaga, Spain.,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
| | - Dolores Pérez-Sala
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
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7
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Barbero N, Fernández‐Santamaría R, Mayorga C, Martin‐Serrano Á, Salas M, Bogas G, Nájera F, Pérez‐Sala D, Pérez‐Inestrosa E, Fernandez TD, Montañez MI, Torres MJ. Identification of an antigenic determinant of clavulanic acid responsible for IgE-mediated reactions. Allergy 2019; 74:1490-1501. [PMID: 30829415 DOI: 10.1111/all.13761] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/23/2019] [Accepted: 02/18/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Selective reactions to clavulanic acid (CLV) account for around 30% of immediate reactions after administration of amoxicillin-CLV. Currently, no immunoassay is available for detecting specific IgE to CLV, and its specific recognition in patients with immediate reactions has only been demonstrated by basophil activation testing, however with suboptimal sensitivity. The lack of knowledge regarding the structure of the drug that remains bound to proteins (antigenic determinant) is hampering the development of in vitro diagnostics. We aimed to identify the antigenic determinants of CLV as well as to evaluate their specific IgE recognition and potential role for diagnosis. METHODS Based on complex CLV degradation mechanisms, we hypothesized the formation of two antigenic determinants for CLV, AD-I (N-protein, 3-oxopropanamide) and AD-II (N-protein, 3-aminopropanamide), and designed different synthetic analogs to each one. IgE recognition of these structures was evaluated in basophils from patients with selective reactions to CLV and tolerant subjects. In parallel, the CLV fragments bound to proteins were identified by proteomic approaches. RESULTS Two synthetic analogs of AD-I were found to activate basophils from allergic patients. This determinant was also detected bound to lysines 195 and 475 of CLV-treated human serum albumin. One of these analogs was able to activate basophils in 59% of patients whereas CLV only in 41%. Combining both results led to an increase in basophil activation in 69% of patients, and only in 12% of controls. CONCLUSION We have identified AD-I as one CLV antigenic determinant, which is the drug fragment that remains protein-bound.
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Affiliation(s)
- Nekane Barbero
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Department of Organic Chemistry IBIMAUniversity of Málaga Málaga Spain
| | | | - Cristobalina Mayorga
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
| | - Ángela Martin‐Serrano
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
| | - María Salas
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
| | - Gador Bogas
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
| | - Francisco Nájera
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Department of Organic Chemistry IBIMAUniversity of Málaga Málaga Spain
| | | | - Ezequiel Pérez‐Inestrosa
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Department of Organic Chemistry IBIMAUniversity of Málaga Málaga Spain
| | - Tahia D. Fernandez
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
| | - María I. Montañez
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
| | - María J. Torres
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
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8
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Arribas F, Falkencrone S, Sola J, Gomez-Serranillos MP, Laguna JJ, Montañez MI, Fernandez TD, Rodríguez D, Pineda F, Skov PS, Mayorga C, Torres MJ. Basophil Histamine Release Induced by Amoxicilloyl-poly-L-lysine Compared With Amoxicillin in Patients With IgE-Mediated Allergic Reactions to Amoxicillin. J Investig Allergol Clin Immunol 2017. [PMID: 28628008 DOI: 10.18176/jiaci.0180] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Amoxicillin (AX) is the ß-lactam most often involved in IgE-mediated reactions. Diagnosis is based mainly on skin testing, although sensitivity is not optimal. We produced a new AX derivative, amoxicilloyl-poly-L-lysine (APL), and analyzed its recognition of IgE using the passive histamine release test (pHRT). METHODS The study population comprised patients (n=19) with confirmed AX allergy and specific IgE to AX and controls (n=10) with good tolerance to AX. pHRT was performed using "IgE-stripped" blood from a single donor that was sensitized in vitro by patient sera and incubated with AX or APL. Histamine release was determined and expressed as nanograms of histamine released per milliliter of blood. RESULTS The clinical symptoms were anaphylaxis (n=9), urticaria (n=7), erythema (n=2), and nondefined immediate reactions (n=1). The median (IQR) time interval between reaction and study was 90 (60-240) days and between drug intake and development of symptoms 24 (10-60) minutes. The median sIgE level was 3.37 (0.95-5.89) kUA/L. The sensitivity of pHRT to APL was 79% and the specificity 100%, which were higher than data obtained with pHRT to AX (63% sensitivity and 90% specificity). There was a positive correlation between maximal histamine release levels obtained with AX and APL (r=0.63). CONCLUSIONS In patients with immediate hypersensitivity reactions to AX, APL showed higher sensitivity and specificity than the culprit drug, AX, when tested in vitro by pHRT. This indicates that APL can improve the in vitro diagnostic accuracy of allergic reactions to AX. Further assessment of skin testing is necessary.
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Affiliation(s)
| | - S Falkencrone
- Department of Dermatology, University Hospital of Odense, Denmark and Charité, Berlin, Germany
| | - J Sola
- Allergy Service, Ramon y Cajal Hospital, Madrid, Spain
| | | | - J J Laguna
- Allergy Unit, Cruz Roja Hospital, Madrid, Spain
| | - M I Montañez
- Allergy Unit, IBIMA-Regional University Hospital of Malaga UMA, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
| | - T D Fernandez
- Allergy Unit, IBIMA-Regional University Hospital of Malaga UMA, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
| | | | - F Pineda
- Diater Laboratorios, Madrid, Spain
| | - P S Skov
- Department of Dermatology, University Hospital of Odense, Denmark and Charité, Berlin, Germany
| | - C Mayorga
- Allergy Unit, IBIMA-Regional University Hospital of Malaga UMA, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
| | - M J Torres
- Allergy Unit, IBIMA-Regional University Hospital of Malaga UMA, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
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9
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Ariza A, Mayorga C, Salas M, Doña I, Martín-Serrano Á, Pérez-Inestrosa E, Pérez-Sala D, Guzmán AE, Montañez MI, Torres MJ. The influence of the carrier molecule on amoxicillin recognition by specific IgE in patients with immediate hypersensitivity reactions to betalactams. Sci Rep 2016; 6:35113. [PMID: 27731424 PMCID: PMC5059705 DOI: 10.1038/srep35113] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 09/23/2016] [Indexed: 11/26/2022] Open
Abstract
The optimal recognition of penicillin determinants, including amoxicillin (AX), by specific IgE antibodies is widely believed to require covalent binding to a carrier molecule. The nature of the carrier and its contribution to the antigenic determinant is not well known. Here we aimed to evaluate the specific-IgE recognition of different AX-derived structures. We studied patients with immediate hypersensitivity reactions to AX, classified as selective or cross-reactors to penicillins. Competitive immunoassays were performed using AX itself, amoxicilloic acid, AX bound to butylamine (AXO-BA) or to human serum albumin (AXO-HSA) in the fluid phase, as inhibitors, and amoxicilloyl-poli-L-lysine (AXO-PLL) in the solid-phase. Two distinct patterns of AX recognition by IgE were found: Group A showed a higher recognition of AX itself and AX-modified components of low molecular weights, whilst Group B showed similar recognition of both unconjugated and conjugated AX. Amoxicilloic acid was poorly recognized in both groups, which reinforces the need for AX conjugation to a carrier for optimal recognition. Remarkably, IgE recognition in Group A (selective responders to AX) is influenced by the mode of binding and/or the nature of the carrier; whereas IgE in Group B (cross-responders to penicillins) recognizes AX independently of the nature of the carrier.
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Affiliation(s)
- Adriana Ariza
- Research Laboratory, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
| | - Cristobalina Mayorga
- Research Laboratory, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
- Allergy Unit, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
- Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
| | - María Salas
- Allergy Unit, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
| | - Inmaculada Doña
- Allergy Unit, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
| | - Ángela Martín-Serrano
- Research Laboratory, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
- Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
| | - Ezequiel Pérez-Inestrosa
- Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
- Department of Organic Chemistry, University of Málaga, IBIMA, Málaga, Spain
| | | | - Antonio E. Guzmán
- Pharmacy Unit, Regional University Hospital of Malaga, Málaga, Spain
| | - María I. Montañez
- Research Laboratory, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
- Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
| | - María J. Torres
- Allergy Unit, IBIMA–Regional University Hospital of Malaga–UMA, Málaga, Spain
- Andalusian Center for Nanomedicine and Biotechnology - BIONAND, Málaga, Spain
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10
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Fernández TD, Ariza A, Palomares F, Montañez MI, Salas M, Martín-Serrano A, Fernández R, Ruiz A, Blanca M, Mayorga C, Torres MJ. Hypersensitivity to fluoroquinolones: The expression of basophil activation markers depends on the clinical entity and the culprit fluoroquinolone. Medicine (Baltimore) 2016; 95:e3679. [PMID: 27281069 PMCID: PMC4907647 DOI: 10.1097/md.0000000000003679] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Although fluoroquinolones (FQs) are generally well-tolerated antibiotics, increasing numbers of hypersensitivity reactions have been reported. These can be evaluated in vitro by basophil activation tests (BATs); however, sensitivity is not optimal. Many factors could influence sensitivity such as basophil activation markers. The objective of this study was to evaluate the influence of 2 different activations markers, CD63 and CD203c, on the sensitivity of BAT to FQ. We studied 17 patients with immediate allergic reactions to FQ. BAT was performed with moxifloxacin and ciprofloxacin using CD193 (CCR3) for basophil selection and CD203c or CD63 as activation markers. Stimulation with ciprofloxacin induced a significantly higher expression of CD63 in ciprofloxacin-allergic patients compared to moxifloxacin-allergic patients (P = 0.002). In patients allergic to moxifloxacin with anaphylactic shock, we have observed an increase in the percentage of cells that upregulate CD203c, whereas patients with anaphylaxis preferentially upregulate CD63. The best sensitivity-specificity was obtained using a cutoff of 3 and the culprit FQ, using CD203c for moxifloxacin-allergic patients (sensitivity = 36.4%; specificity = 94.4%), and CD63 for ciprofloxacin-allergic patients (sensitivity = 83.3%; specificity = 88.9%). A negative correlation was found between the upregulation of CD63 and CD203c and the time interval between the reaction occurrence and the performance of the test (Spearman r = -0.446; P < 0.001 for CD63 and Spearman r = -0.386; P < 0.001 for CD203c). The performance of BAT for FQ allergy must be optimized for each drug, taking into account possible differences in the stimulation mechanism that leads to the upregulation of different activation markers.
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Affiliation(s)
- Tahia D. Fernández
- Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Adriana Ariza
- Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Francisca Palomares
- Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - María I. Montañez
- Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - María Salas
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Angela Martín-Serrano
- Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Rubén Fernández
- Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Arturo Ruiz
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Miguel Blanca
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Cristobalina Mayorga
- Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
- ∗ Correspondence: Cristobalina Mayorga, Research Unit for Allergic Diseases, IBIMA-Regional University Hospital of Malaga, Pl. Hospital Civil, 29009 Malaga, Spain (e-mail: )
| | - María J. Torres
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
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11
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Lacombe-Barrios J, Salas M, Gómez F, Doña I, Ariza A, Mayorga C, Blanca M, Montañez MI, Torres MJ. The Addition of Benzylpenicillin Does Not Increase the Skin Test Sensitivity Obtained With Classic β-Lactam Determinants. J Investig Allergol Clin Immunol 2016; 26:52-54. [PMID: 27012018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
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12
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Torres MJ, Ariza A, Fernández J, Moreno E, Laguna JJ, Montañez MI, Ruiz-Sanchez AJ, Blanca M. Role of minor determinants of amoxicillin in the diagnosis of immediate allergic reactions to amoxicillin. Allergy 2010; 65:590-6. [PMID: 19968633 DOI: 10.1111/j.1398-9995.2009.02245.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Skin testing of subjects with immediate hypersensitivity to amoxicillin is performed using major and minor determinants of benzylpenicillin plus amoxicillin. However, sensitivity is not optimal, and other determinants need to be considered. We assessed the sensitivity of stable, well-characterized minor determinants of amoxicillin in subjects with immediate allergic reactions to amoxicillin to improve skin test sensitivity. METHODS Amoxicillin, amoxicilloic acid, and diketopiperazine were prepared and characterized by reverse-phase HPLC, tested in vivo by skin testing and in vitro by basophil activation test and RAST inhibition assay. RESULTS Patients with immediate hypersensitivity to amoxicillin were selected: Group A (n = 32), skin test positive just to amoxicillin; Group B (n = 19), skin test positive to benzylpenicillin determinants; Group C (n = 10), skin test negative and amoxicillin drug provocation test positive. In Group A, 27 subjects (81.8%) were skin test positive to amoxicillin, ten (30.3%) to amoxicilloic acid, two (6.1%) to diketopiperacine, and six (18.2%) negative. In Group B, nine (50%) were positive to amoxicillin, eight (42.1%) to amoxicilloic acid, none to diketopiperacine, and nine (50%) negative. In Group C, skin tests were negative. BAT was positive to amoxicillin in 26 patients (50.9%), to amoxicilloic acid in 15 (29.1%), and diketopiperazine in four (7.8%). RAST inhibition studies showed > 50% inhibition in all sera, with the highest concentration of amoxicillin and amoxicilloic acid. CONCLUSIONS The combination of minor determinants of amoxicillin, amoxicilloic acid, and diketopiperazine seems to be of no greater value than the use of amoxicillin alone. Further efforts are needed to find new structures to improve sensitivity in the diagnosis of immediate hypersensitivity to betalactams.
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13
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Rodríguez-Bada JL, Montañez MI, Torres MJ, Mayorga C, Canto G, Perez-Inestrosa E, Suau R, Blanca M. Skin testing for immediate hypersensitivity to betalactams: comparison between two commercial kits. Allergy 2006; 61:947-51. [PMID: 16867047 DOI: 10.1111/j.1398-9995.2006.01176.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Skin testing with major and minor determinants of benzylpenicillin is the recommended standard practice to evaluate subjects with immediate hypersensitivity to betalactams. The withdrawal of these products from the market has set us back to the early days, before the introduction of reagents for in vivo testing. OBJECTIVES To compare a recently released kit of benzylpenicillin conjugated to poly-l-lysine (PPL) and minor determinants mixture (MDM) with the previously existing kit in a positive control group of subjects sensitized to major and/or minor determinants of benzylpenicillin. METHODS Skin tests with both kits were made in a group of positive subjects previously diagnosed with immediate hypersensitivity to penicillins and with positive results to PPL and/or MDM and in a negative control group. Radioallergosorbent test (RAST) inhibition assays with a pool of sera and individual samples were carried out to compare the inhibition capacity of PPL and MDM of both kits. RESULTS Of 22 cases selected from our historical group, 14 were positive: eight to PPL, three to MDM and three to both. These results were equivalent for both kits. RAST inhibition studies showed similar potencies in the inhibition of PPL and MDM. CONCLUSIONS Both tests show similar results in terms of RAST inhibition assays and skin tests sensitivity and specificity in the groups selected. The new assay can be used for the same purpose and indications as the previous test.
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Affiliation(s)
- J L Rodríguez-Bada
- Research Unit for Allergic Diseases, Allergy Service, Carlos Haya Hospital, Málaga, Spain
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14
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Sánchez-Sancho F, Perez-Inestrosa E, Suau R, Montañez MI, Mayorga C, Torres MJ, Romano A, Blanca M. Synthesis, characterization and immunochemical evaluation of cephalosporin antigenic determinants. J Mol Recognit 2003; 16:148-56. [PMID: 12833570 DOI: 10.1002/jmr.621] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Lack of knowledge of the exact chemical structure of cephalosporin antigenic determinants has hindered clinical interpretation of adverse reactions to these drugs and delayed understanding of the mechanisms involved in the specific recognition and binding of IgE molecules to these antigenic determinants. We further resolve the relationship between structure and activity of proposed antigenic chemicals, including the rational design and synthesis of these haptenic structures. Comparative RAST inhibition studies of the synthesized molecules revealed that they were recognized by IgE antibodies induced by cephalosporin antibiotics. Thus, these data indicate that recognition is mainly directed to the acyl side chain and to the beta-lactam fragment that remains linked to the carrier protein in the cephalosporin conjugation course.
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Torres MJ, Pérez-Inestrosa E, Mayorga C, Sánchez-Sancho F, Montañez MI, Moya MC, Romano A, Suau R, Blanca M. Toward a better understanding of allergy to cephalosporin antibiotics synthesis and characterization of major determinants. J Allergy Clin Immunol 2002. [DOI: 10.1016/s0091-6749(02)81558-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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