M Blanca

University of Lorraine, Nancy, Lorraine, France

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Publications (396)1909.59 Total impact

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    ABSTRACT: Local allergic rhinitis (LAR) is characterized by the presence of a nasal Th2 inflammatory response with local production of specific IgE antibodies and a positive response to a nasal allergen provocation test (NAPT) without evidence of systemic atopy.The prevalence has been shown to be up to 25% in subjects affected with rhinitis with persistence, comorbidity and evolution similar to allergic rhinitis. LAR is a consistent entity that does not evolve to allergic rhinitis with systemic atopy over time although patients have significant impairment in quality of life and increase in the severity of nasal symptoms over time. Lower airways can be also involved.The diagnosis of LAR is based mostly on demonstration of positive response to NAPT and/or local synthesis of specific IgE. Allergens involved include seasonal or perennial such as house dusts mites, pollens, animal epithelia, molds (alternaria) and others. Basophils from peripheral blood may be activated by the involved allergens suggesting the spill over of locally synthesized specific IgE to the circulation. LAR patients will benefit from the same treatment as allergic patients by using antihistamines, inhaled corticosteroids and IgE antagonists. Studies on immunotherapy are ongoing and will determine its efficacy in LAR in terms of symptoms improvement and evolution of the natural course of the disease.This article is protected by copyright. All rights reserved.
    Clinical & Experimental Allergy 12/2014; · 4.79 Impact Factor
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    ABSTRACT: Non-immediate drug reactions (NIR) are induced by specific immunological mechanisms and involve the recognition of hapten molecules by the immune system, with the participation of dendritic cells and other antigen-presenting cells. This process is followed by an effector response that can induce several clinical entities, ranging from mild to severe. The type of immunological recognition can be used as the basis for the diagnostic approach. Both in vivo and in vitro tests are available for the diagnosis of NIR. In vivo tests consist of the reproduction of a diminished immune response with the culprit drug and in vitro tests are based on the stimulation of memory cells in culture. If both tests give negative results, a drug provocation test can be used.
    Expert Review of Clinical Immunology 10/2014; · 2.89 Impact Factor
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    ABSTRACT: Metamizole is a pain-killer drug that has been banned in some countries because of its toxicity, but it is still used in many countries due to its effective analgesic and antispasmodic properties. Although large variability in the biodisposition and adverse effects of metamizole are known, factors underlying this variability are poorly understood. We analyzed the urinary recovery of metabolites, as well as the association of these profiles with genetic and non-genetic factors, in a group of 362 healthy individuals. Gender and functional polymorphisms are strongly related to metabolic profiles. N-demethylation of the active metabolite MAA is diminished in carriers of the CYP2C19*2 allele and in NAT2-slow acetylators. Acetylation of the secondary metabolite AA is decreased in men, in drinkers and in NAT2-slow acetylators with a differential effect of NAT2*5 and NAT2*6 alleles. The formylation of MAA is diminished in older subjects and in carriers of defect CYP2C9 and CYP2C19 alleles. Two novel arachidonoyl metabolites were identified for the first time in humans. Women and NAT2-slow acetylators show higher concentrations, whereas the presence of the rapid CYP2C19*17 allele is associated with lower concentrations of these metabolites. All genetic associations show a gene-dose effect. We identified for the first time genetic and non-genetic factors related to the oxidative metabolism of analgesic drug metamizole, as well as new active metabolites in humans. The phenotypic and genetic factors identified in this study have a potential application as biomarkers of metamizole biotransformation and toxicity.
    Biochemical Pharmacology 09/2014; 91(5). · 4.58 Impact Factor
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    ABSTRACT: Immediate reactions to β-lactams are the most common causes of anaphylactic reactions and can be life-threatening. The few known genetic factors influencing these reactions suggest a link with atopy and inflammation.
    Journal of Allergy and Clinical Immunology 09/2014; · 12.05 Impact Factor
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    ABSTRACT: Apple allergy manifests as two main groups of clinical entities reflecting different patterns of allergen sensitization: oral allergy syndrome (OAS) and generalized symptoms (GS).
    PLoS ONE 09/2014; 9(9):e107304. · 3.53 Impact Factor
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    ABSTRACT: Nonsteroidal anti-inflammatory drugs (NSAIDs) are the drugs most commonly involved in hypersensitivity drug reactions. Such reactions can be due to the release of inflammatory mediators in the absence of specific immunologic recognition, or immunoglobulin E (IgE)- or T-cell-selective responses. The former include upper and lower airway symptoms in patients with chronic underlying respiratory disease, the exacerbation of chronic spontaneous urticaria, and the induction of cutaneous symptoms. The latter include selective responses to a single NSAID with good tolerance to strong cyclooxygenase-1 inhibitors, with a putative IgE or T-cell mechanism proposed. These reactions can be acute or delayed.
    Immunology and Allergy Clinics of North America. 08/2014; 34(3):507–524.
  • Bernard Y Thong, Miguel Blanca
    Current Opinion in Allergy and Clinical Immunology 08/2014; 14(4):269-270. · 3.40 Impact Factor
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    ABSTRACT: The human leukocyte antigen (HLA) genes have a fundamental role in immunity. Polymorphisms at HLA-DRB1 and HLA-DQB1 are well known to impact asthma susceptibility as indicated by many candidate-gene and genome-wide association studies (GWAS). We sought to better understand the associations at these two loci performing an association study of SNPs and imputed classic alleles from HLA-DRB1 and HLA-DQB1 genes with asthma using a two-stage case-control study. We first selected 22 SNPs that allow to accurately defining classic alleles at these HLA genes in European populations, and evaluated their ability to predict classic alleles in individuals from the Spanish population with paired data for classic alleles. Then, we tested the association of accurately predicted classic alleles in a total of 3,115 samples from Spain. We identified 2 SNPs, constituting eQTLs in the region, and one classic allele (HLA-DRB1*15:01) that were consistently associated with asthma across the two stages. Interestingly, the 2 SNPs showed concordant allelic effects in asthma with the ones shown with lipid traits. In addition, a third SNP demonstrated a strong association effect with allergen-specific sensitization among asthma cases. Besides, we describe for the first time a classic allele-based pleiotropic effect for HLA-DRB1*15:01, being opposite between asthma and other immune-related diseases. These results lines up with previous evidence showing some other genes firmly involved in asthma pathogenesis that also demonstrate opposite effects in autoimmune diseases.
    The Journal of allergy and clinical immunology 07/2014; · 12.05 Impact Factor
  • International archives of allergy and immunology. 07/2014; 164(2):147-148.
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    ABSTRACT: Hypersensitivity drug reactions (HDRs) encompass a wide spectrum of unpredictable clinical entities. They represent an important health problem, affecting people of all ages, and lead to a large strain on the public health system. Here, we summarise experiments that use high throughput genomics technologies to investigate HDRs. We also introduce the field of systems biology as a relatively recent discipline concerned with the integration and analysis of high throughput datasets such as DNA microarrays and next generation sequencing data. We describe previous studies that have applied systems biology techniques to related fields such as allergy and asthma. Finally, we present a number of potential applications of systems biology to the study of HDRs, in order to make the reader aware of the types of analyses that can be performed and the insights that can be gained through their application.This article is protected by copyright. All rights reserved.
    Clinical & Experimental Allergy 07/2014; · 4.79 Impact Factor
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    ABSTRACT: Background Act d 12 (11S globulin) and Act d 13 (2S albumin) are two novel relevant allergens from kiwi seeds that might be useful to improve the diagnostic sensitivity and the management of kiwifruit allergic patients.Objective: To perform a comprehensive structural and immunological characterization of purified Act d 12 and Act d 13 from kiwi seeds.Methods Sera from 55 well-defined kiwifruit allergic patients were used. Act d 12 and Act d 13 were purified by chromatographic procedures. Circular dichroism, mass spectrometry, concanavalinA detection, immunoblotting, enzyme-linked immunosorbent assays, basophil activation tests and IgE-inhibition experiments were used.ResultsAct d 12 and Act d 13 were purified from kiwi seeds to homogeneity by combining size-exclusion, ion-exchange and RP-HPLC chromatographies. Both purified allergens preserve the structural integrity and display typical features of their homologous counterparts from the 11S globulin and 2S albumin protein families, respectively. These allergens are released from kiwi seeds after oral and gastric digestion of whole kiwifruit, demonstrating their bioavailability after ingestion. The allergens retain the capacity to bind serum IgE from kiwifruit allergic patients, induce IgE cross-linking in effector circulating basophils and display in vitro IgE cross-reactivity with homologous counterparts from peanut and tree nuts.Conclusion Purified Act d 12 and Act d 13 from kiwi seeds are well-defined molecules involved in in vitro IgE cross-reactivity with peanut and tree nuts. Their inclusion in component-resolved diagnosis of kiwifruit allergy might well contribute to improve the diagnostic sensitivity and the management of kiwifruit allergic patients.This article is protected by copyright. All rights reserved.
    Allergy 07/2014; · 5.88 Impact Factor
  • Journal of Allergy and Clinical Immunology 06/2014; · 12.05 Impact Factor
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    ABSTRACT: Ara h 1, Ara h 2, and Ara h 3 are important sensitizers in peanut allergy. Ara h 9 has also been shown to be relevant in the Mediterranean area. We evaluated the basophil response to peanut allergens and Pru p 3 in Mediterranean patients: Group 1, peanut and peach allergy; Group 2, peanut allergy and tolerance to peach; Group 3, peach allergy and tolerance to peanut; Group 4, nonallergic subjects that tolerate both peanut and peach. Compared to controls (Group 4), there was an increased basophil activation with Ara h 2 (P = 0.031) and Pru p 3 (P = 0.009) in Group 1 and with Ara h 1 (P = 0.016), Ara h 2 (P = 0.001), and Ara h 9 (P = 0.016) in Group 2. Importantly, only Ara h 2 showed an increased activation (P = 0.009) in Group 2 compared to Group 3. Ara h 2 is the best discriminating allergen for peanut allergy diagnosis in a Mediterranean population showing two patterns: patients also allergic to peach, responding to Ara h 2 and Pru p 3, and patients allergic only to peanut, responding to Ara h 1, Ara h 2, and Ara h 9.
    Allergy 05/2014; · 5.88 Impact Factor
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    The Journal of allergy and clinical immunology 04/2014; · 12.05 Impact Factor
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    ABSTRACT: Background Asthma is characterized by airway inflammation and remodelling in which matrix metalloproteinases (MMPs) play an important role. MMP-9 is the major MMP found in the bronchoalveolar lavage fluids and bronchial biopsies from patients with allergic asthma after allergen challenge, where it correlates with the count of neutrophils and macrophages. However, the cellular sources of MMP-9 in this inflammatory condition have not yet been clearly identified. This work was undertaken to analyse whether neutrophils may be a source of MMP-9 in the allergic asthma condition upon allergen challenge.Methods Neutrophils from allergic asthmatic patients were in vitro stimulated, and the levels of MMP-9 release were measured in the cell culture supernatants using enzyme-linked immunosorbent assay (ELISA) and zymography.ResultsWe show that MMP-9 is released by neutrophils, but not by eosinophils from allergic asthmatic patients in response to allergens to which the patients were sensitized. Neutrophils also released MMP-9 in response to anti-IgE Abs, and agonist Abs against FcεRI, FcεRII/CD23 and galectin-3. Inhibitors of transcription and translation, actinomycin D and cycloheximide, partially cancelled this process, suggesting that MMP-9 is also de novo synthesized in response to stimuli. We also show evidence that the MAPKs, p38 and extracellular signal-regulated kinase, as well as the transcription factor NF-κB, are involved, as specific chemical inhibitors of these cell-signalling pathways abolished the anti-IgE/allergen-dependent MMP-9 release.Conclusions These data demonstrate that the exposure of neutrophils to allergens leads to generation of MMP-9, which may then lead to remodelling in asthma.
    Allergy 04/2014; · 5.88 Impact Factor
  • Clinical & Experimental Allergy 03/2014; 44(3):459. · 4.79 Impact Factor
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    ABSTRACT: Hypersensitivity drug reactions (HDRs) represent a large and important health problem, affecting many patients and leading to a variety of clinical entities, some of which can be life-threatening. The culprit drugs include commonly used medications including antibiotics and NSAIDs. Nontherapeutical agents, such as contrast media, are also involved. Because the pathophysiological mechanisms are not well known and the current diagnostic procedures are somewhat insufficient, new approaches are needed for understanding the complexity of HDRs. Histochemical and molecular biology studies have enabled us to classify these reactions more precisely. Pharmacogenetics has led to the identification of several genes, involved mainly in T-cell-dependent responses, with a number of markers being replicated in different studies. These markers are now being considered as potential targets for reducing the number of HDRs. Transcriptomic approaches have also been used to investigate HDRs by identifying genes that show different patterns of expression in a number of clinical entities. This information can be of value for further elucidation of the mechanisms involved. Although first studies were performed using RT-PCR analysis to monitor the acute phase of the reaction, nowadays high-density expression platforms represent a more integrative way for providing a complete view of gene expression. By combining a detailed and precise clinical description with information obtained by these approaches, we will obtain a better understanding and management of patients with HDRs.
    Allergy 02/2014; 69(2):150-8. · 5.88 Impact Factor
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    ABSTRACT: Quantitation of specific IgE by immunoassay is a recommended in vitro test for the diagnosis of immediate hypersensitivity reactions to betalactams (BLs), particularly when skin test results are negative. IgE antibodies that recognize the common nuclear structure of all BLs or the specific side chain structure can be mainly distinguished by immunoassays. The aim of this study was to develop an immunoassay system to detect IgE antibodies with different specificities. Cellulose discs conjugated with benzylpenicillin (BP), amoxicillin (AX) or both drugs, with poly-L-lysine (PLL) as carrier molecule, were used as solid phases in radioallergosorbent test (RAST). Direct and inhibition radioimmunoassay studies were made to verify the structures recognized by serum IgE antibodies from penicillin-allergic patients. Our results indicated that the addition of both haptens did not decrease the capacity to capture IgE when serum specific to either BP or AX was used, at least in terms of sensitivity. And the inclusion of two haptens improved significantly the levels of IgE detection in patients who recognized both BP and AX. Therefore, the use of a solid phase with a carrier molecule conjugated with two determinants (AX and BP) is helpful to recognize IgE antibodies against either of these determinants and is useful for screening sera with different specificities.
    Journal of immunological methods 02/2014; · 2.35 Impact Factor
  • Journal of Allergy and Clinical Immunology; 02/2014
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    ABSTRACT: Nonsteroidal anti-inflammatory drugs (NSAIDs) are the drugs most frequently involved in allergic reactions of which two main types exist: IgE-mediated and crossintolerance. The diagnosis of crossintolerance reactions is often based on the drug provocation test. The potential value of the basophil activation test (BAT) was evaluated using different basophil markers in the diagnosis of patients with crossintolerance to NSAIDs and cutaneous symptoms. We studied 46 patients with crossintolerance to NSAIDs and 45 tolerant controls. BAT was performed with acetyl salicylic acid, paracetamol, diclofenac, dipyrone, naproxen, and ibuprofen at four different concentrations using CD193 and CD203c as basophil markers and CD63 as activation marker. We compared BAT results using CD193(+) or CD193(+) CD203c(+) for basophil selection and found a significant increase in the stimulation index when using CD193(+) CD203c(+) in both patients and controls (P = 0.004 and P = 0.017, respectively). Selection of living cells only produced an increase in basophil stimulation in patients for both CD193(+) and CD193(+) CD203c(+) (P < 0.001 for both), whereas in controls there was no change with CD193(+) and a decrease with CD193(+) CD203c(+) (P = 0.001). We found that CD193(+) CD203c(+) increased the percentage of positive cases in patients and controls when compared with CD193(+) . When excluding dead cells, there was an increase of 21.7% in patients and 10% in controls. These results indicate that using CD193(+) CD203(+) , excluding dead cells, is the best approach for BAT although this test is not recommended for the diagnosis of patients with crossintolerance to NSAIDs owing to its low sensitivity and specificity. © 2014 International Society for Advancement of Cytometry.
    Cytometry Part A 01/2014; · 3.71 Impact Factor

Publication Stats

5k Citations
1,909.59 Total Impact Points

Institutions

  • 2013–2014
    • University of Lorraine
      • Faculty of medicine
      Nancy, Lorraine, France
  • 2012–2014
    • Civil Hospital, Raikot
      Rāikot, Punjab, India
    • Hospital Universitari Mutua de Terrassa
      Terrassa, Catalonia, Spain
    • French Institute of Health and Medical Research
      Lutetia Parisorum, Île-de-France, France
  • 1988–2014
    • Hospital Regional Universitario de Málaga
      • • Departamento de Medicina Interna
      • • Departamento de Alergología
      Málaga, Andalusia, Spain
  • 2011–2013
    • Universidad de Extremadura
      • • Departamento de Fisiología
      • • Departamento de Bioquímica, Biología Molecular y Genética
      Ara Pacis Augustalis, Extremadura, Spain
    • Tan Tock Seng Hospital
      Tumasik, Singapore
  • 2009–2013
    • Hospital Universitario Infanta Leonor
      Madrid, Madrid, Spain
    • Hospital 12 de Octubre
      Madrid, Madrid, Spain
  • 2002–2011
    • University of Malaga
      • Department of Organic Chemistry
      Málaga, Andalusia, Spain
  • 2001–2011
    • Complesso Integrato Columbus
      Roma, Latium, Italy
  • 2000–2011
    • Hospital Universitario La Paz
      • Servicio de Alergología
      Madrid, Madrid, Spain
  • 2006
    • Hospital Virgen del Camino
      Cádiz, Andalusia, Spain
  • 2003
    • Karl-Franzens-Universität Graz
      Gratz, Styria, Austria
  • 1999
    • Hospital General Universitario de Elche
      Elche, Valencia, Spain
    • University of Milan
      Milano, Lombardy, Italy
  • 1998–1999
    • Catholic University of the Sacred Heart
      • Institute of Internal and Geriatric Medicine
      Milano, Lombardy, Italy
  • 1997
    • Hospital Universitario San Cecilio
      Granata, Andalusia, Spain