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Poza-Guedes P.,Consulta de Alergia Infantil | Barrios Y.,Hospital Universitario Of Canarias | Fuentes V.,Consulta de Alergia Infantil | Franco A.,Hospital Universitario Of Canarias | And 7 more authors.
BioMed Research International | Year: 2014

Background. Angiogenesis has a key role in several conditions and is regulated by several factors such as the platelet-derived growth factor (PDGF) or the vascular endothelial growth factor (VEGF). The goal of this study was to investigate the possible role of PDGF and VEGF in a group of patients with severe food allergy. Methods. We design a prospective longitudinal study (n=30) with patients with persistent cow's milk proteins (CMP) allergy. After achieving a CMP rush desensitization protocol, a clinical followup including SPT and blood samples to determine sIgE, protein levels, PDGF, and VEGF-A and a panel of the most representative Th1, Th2, Treg, and Th17 cytokines were also monitored. Results. Baseline levels of PDGF and VEGF in the CMP allergic patients (1170 pg/mL and 253 pg/mL) were different compared to those nonallergic CMP control subjects (501 pg/mL and 108 pg/mL). Both PDGF and VEGF were significantly downregulated (P<0.05) 6 months after completion of the CMP desensitization process and remained significantly decreased 12 months later. Conclusion. The present study shows a significant increase of PDGF and VEGF in anaphylaxis suffering children compared to a control group. Interestingly, both VEGF and PDGF were significantly downregulated after completing a full CMP rush IgE desensitization. © 2014 Paloma Poza-Guedes et al. Source

Iglesias-Souto J.,Consulta de Alergia Infantil | Iglesias-Souto J.,Complejo Hospital Universitario Candelaria | Gonzalez R.,Consulta de Alergia Infantil | Gonzalez R.,Complejo Hospital Universitario Candelaria | And 7 more authors.
Pediatric Infectious Disease Journal | Year: 2012

Many children with adverse reactions to beta-lactams are labeled as allergic without performing an allergy study to confirm it. In this retrospective study of 10 years, we detected only 3.3% positive cases. Although international guidelines recommend a second allergy workup in patients with a negative study, we found from our results a low profitability of retesting. Copyright © 2012 by Lippincott Williams &Wilkins. Source

Poza-Guedes P.,Consulta de Alergia Infantil | Barrios Y.,Hospital Universitario Of Canarias | Gonzalez-Perez R.,Consulta de Alergia Infantil | Sanchez-Machin I.,Consulta de Alergia Infantil | And 2 more authors.
Allergy, Asthma and Clinical Immunology | Year: 2016

Rationale: The prevalence of many phenotypes of food allergy is increasing. Specific gastrointestinal (GI) phenotype of food allergy (GI allergy) is also increasing but it is difficult to know the prevalence because of many entities. Methods and Results: A 1 year retrospective study of pediatric patients complaining exclusively gastrointestinal symptoms after cow's milk consumption and at least one positive specific IgE (sIgE) to cow's milk (CM) proteins (CMP) was done (n = 39). The most prevalent symptom was abdominal cramps in 35 patients (90 %), discomfort or abdominal distention in 30 patients (75 %), diarrhea in 10 patients (25 %) and constipation in 5 patients (12 %). IgA anti-transglutaminase antibodies were absent and lactose intolerance was ruled out in all patients. Average of total IgE on this group was 288 UI/ml. sIgE against β-lactoglobulin was the dominant with an average of 4.14 kU/l. sIgE to casein (CAS), which is the dominant protein in systemic anaphylaxis was 1.74 kU/l; sIgE to α-lactoalbumin, the other whey protein, was 0.83 kU/l and sIgE levels to CM were 0.78 kU/l. The quotient sIgE CAS/sIgE β-lactoglobulin in these patients was always lower than 1. Patients experienced an improvement of their symptoms after a CM free diet. An open oral challenge with CM did mimic their initial symptoms in all patients. However, the open oral challenge with dairy products was well tolerated. Conclusions: Patients with a specific phenotype of GI allergy with CM have specific IgE against β-lactoglobulin, as a dominant sIgE. These patients could beneficiate of a diet with dairy products. © 2016 Poza-Guedes et al. Source

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