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1.
Med. oral patol. oral cir. bucal (Internet) ; 29(2): e273-e279, Mar. 2024. tab, ilus
Artigo em Inglês | IBECS | ID: ibc-231231

RESUMO

Background: The differentiation between primary and metastatic salivary gland neoplasms (SGNs) helps in determining appropriate management strategies, including the need for additional diagnostic tests, surveillance, or aggressive treatment. The purpose of this study was to identify and quantify the immature and mature dendritic cells (DCs) in metastatic and no metastatic SGNs and determine its association with clinicopathological findings. Material and Methods: Cross-sectional, observational, and descriptive study that includes 33 malignant salivary gland neoplasms [MSGN (6, 18.1% metastatic)], and 22 pleomorphic adenomas (PA), as a control group. Clinical and histopathological characteristics were obtained. Immunohistochemistry for human leukocyte antigen Drelated (HLA-DR), CD1a, CD83, and Ki-67 proteins was done. Positive intra- and peritumoral DCs were counted. Results: Individuals with MSGN had a lower density of intratumoral HLA-DR+ cells than those with PA (p=0.001), Ki-67 immunostaining was significantly higher in MSGN than in PA (6% vs. 1.4%, p<0.001). Metastatic MSGN showed less intratumoral CD1a+ than non-metastatic (3.2 vs. 165.1, p=0.001). No differences in intra- and peritumoral CD83+ cells were found between benign and malignant SGN. Conclusions: These results suggest that the immune-protective function of intratumoral DCs is compromised in MSGNs. DCs markers may represent useful prediction tools for metastases in salivary gland malignancies, with crucial implications in the implementation of appropriate disease management strategies. (AU)


Assuntos
Humanos , Neoplasias , Glândulas Salivares , Diagnóstico , Terapêutica , Células Dendríticas , Imuno-Histoquímica , Antígenos HLA , Estudos Transversais , Epidemiologia Descritiva
2.
Rev. esp. cardiol. (Ed. impr.) ; 75(3): 251-260, mar. 2022. mapas, tab, graf
Artigo em Espanhol | IBECS | ID: ibc-206982

RESUMO

Introducción y objetivos: El desarrollo de anticuerpos contra antígenos leucocitarios humanos es una complicación conocida de la asistencia ventricular de larga duración. El propósito del presente estudio es evaluar su incidencia durante el empleo de dispositivos de asistencia ventricular de corta duración (DAVC) (CentriMag), sus determinantes y su repercusión en los resultados del trasplante cardiaco. Métodos: Estudio retrospectivo con pacientes tratados con DAVC como puente al trasplante entre 2009 y 2019. Se consideró sensibilización un panel reactivo de anticuerpos calculado> 10%. Las variables de respuesta fueron supervivencia y supervivencia libre de rechazo agudo (RA). Resultados: Se trató con DAVC a 89 pacientes, con una mediana de edad de 56,0 [intervalo intercuartílico, 50,0-59,9] años y el 16,8% de mujeres, durante una mediana de 23,6 [16,6-35,0] días. El 12,4% se sensibilizó durante la asistencia. El único determinante independiente de la sensibilización fue el sexo femenino (OR=8,67; IC95%, 1,93-38,8; p=0,005). De los 89 pacientes, 21 fallecieron durante la asistencia y 68 se sometieron a trasplante. De los pacientes trasplantados, 8 (11,8%) fallecieron y 20 (29,4%) tuvieron algún episodio de RA tras un seguimiento promedio de 49,6 ±31,2 meses tras el trasplante. Tras ajuste multivariable, la sensibilización aumentó el riesgo de RA (HR=3,64; IC95%, 1,42-9,33; p=0,007), con una tendencia no significativa a mayor mortalidad (HR=4,07; IC95%, 0,96-17,3; p=0,057). Conclusiones: La sensibilización relacionada con los DAVC es posible, predomina en el sexo femenino y se asocia de manera significativa con el RA, con una tendencia no significativa a mayor mortalidad (AU)


Introduction and objectives: The development of human-leukocyte antigen antibodies is a well-known adverse effect of the use of long-term ventricular assist devices (VADs). The aim of this study was to determine the incidence of sensitization during short-term mechanical circulatory support with VAD (CentriMag), its determinants, and its impact on posttransplant outcomes. Methods: We performed a retrospective review of patients who were bridged to transplant with short-term VAD from 2009 to 2019. Sensitization was defined as a calculated panel-reactive antibody> 10%. The endpoints included overall survival and rejection-free survival. Results: A total of 89 patients (median age 56.0 [interquartile range, 50.0-59.9] years, 16.8% female) received a short-term VAD as a bridge to transplant. The median duration of support was 23.6 [interquartile range, 16.6-35.0] days. Eleven patients (12.4%) became sensitized during support. The only factor significantly associated with sensitization was female sex (OR, 8.67; 95%CI, 1.93–38.8; P=.005). Of the 89 patients, 21 patients died during support; 68 patients underwent heart transplant. After a mean follow-up of 49.6 ±31.2 months, 8 patients (11.8%) died and 20 (29.4%) had at least 1 rejection episode. On multivariate analysis, sensitization was an independent predictor of acute rejection (HR, 3.64; 95%CI, 1.42-9.33; P=.007), with a nonstatistically significant trend to higher mortality (HR, 4.07; 95%CI, 0.96-17.3; P=.057). Conclusions: Sensitization with short-term VADs can occur and is significantly associated with female sex and with rejection. Sensitization also showed a nonstatistically significant trend to higher mortality (AU)


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Insuficiência Cardíaca/cirurgia , Transplante de Coração , Coração Auxiliar , Antígenos HLA , Estudos Retrospectivos , Incidência , Resultado do Tratamento , Prognóstico
3.
Med. intensiva (Madr., Ed. impr.) ; 45(2): 96-103, mar. 2021. tab
Artigo em Inglês | IBECS | ID: ibc-193526

RESUMO

OBJECTIVE: Different genetic polymorphisms of human leukocyte antigen (HLA) have been associated with the risk and prognosis of autoimmune and infectious diseases. The objectives of this study were to determine whether there is an association between HLA genetic polymorphisms and the susceptibility to and mortality of coronavirus disease 2019 (COVID-19) patients. DESIGN: Observational and prospective study. SETTING: Eight Intensive Care Units (ICU) from 6 hospitals of Canary Islands (Spain). PATIENTS: COVID-19 patients admitted in ICU and healthy subjects. INTERVENTIONS: Determination of HLA genetic polymorphisms. MAIN VARIABLE OF INTEREST: Mortality at 30 days. RESULTS: A total of 3886 healthy controls and 72 COVID-19 patients (10 non-survivors and 62 survivor patients at 30 days) were included. We found a trend to a higher rate of the alleles HLA-A*32 (p = 0.004) in healthy controls than in COVID-19 patients, and of the alleles HLA-B*39 (p = 0.02) and HLA-C*16 (p = 0.02) in COVID-19 patients than in healthy controls; however, all these p-values were not significant after correction for multiple comparisons. Logistic regression analysis showed that the presence of certain alleles was associated with higher mortality, such as the allele HLA-A*11 after controlling for SOFA (OR = 7.693; 95% CI = 1.063-55.650; p = 0.04) or APACHE-II (OR = 11.858; 95% CI = 1.524-92.273; p = 0.02), the allele HLA-C*01 after controlling for SOFA (OR = 11.182; 95% CI = 1.053-118.700; p = 0.04) or APACHE-II (OR = 17.604; 95% CI = 1.629-190.211; p = 0.02), and the allele HLA-DQB1*04 after controlling for SOFA (OR = 9.963; 95% CI = 1.235-80.358; p = 0.03). CONCLUSIONS: The new finding from our preliminary study of small sample size was that HLA genetic polymorphisms could be associated with COVID-19 mortality; however, studies with a larger sample size before definitive conclusions can be drawn


OBJETIVO: Diferentes polimorfismos genéticos de los antígenos leucocitarios humanos (HLA) están asociados con el riesgo y el pronóstico de enfermedades autoinmunes e infecciosas. Los objetivos de estudio fueron determinar si existe una asociación entre polimorfismos genéticos de HLA y la susceptibilidad y mortalidad de pacientes con la enfermedad del coronavirus 2019 (COVID-19). DISEÑO: Estudio observacional y prospectivo. ÁMBITO: Ocho unidades de cuidados intensivos (UCI) de 6 hospitales de las Islas Canarias (España). PACIENTES: Pacientes COVID-19 ingresados en la UCI y sujetos sanos. INTERVENCIONES: Se determinaron los polimorfismos genéticos de los HLA. VARIABLE DE INTERÉS PRINCIPAL: Mortalidad a los 30 días. RESULTADOS: Se incluyeron 3.886 sujetos sanos y 72 pacientes COVID-19 (10 fallecidos y 62 supervivientes a 30 días). Encontramos una tendencia a una mayor frecuencia de los alelos HLA-A*32 (p = 0,004) en sujetos sanos que en pacientes COVID-19, y de los alelos HLA-B*39 (p = 0,02) y HLA-C*16 (p = 0,02) en pacientes COVID-19 que en sujetos sanos; sin embargo, no fueron significativos al corregir por comparaciones múltiples. En la regresión logística encontramos que la presencia de ciertos alelos estuvo asociada con mayor mortalidad, como el alelo HLA-A*11 controlando por SOFA (OR = 7.693; IC del 95% = 1.063-55.650; p = 0,04) o APACHE-II (OR = 11.858; IC del 95% = 1.524-92.273; p = 0,02), el alelo HLA-C*01 controlando por SOFA (OR = 11.182; IC del 95% = 1.053-118.700; p = 0,04) o APACHE-II (OR = 17.604; IC del 95% = 1.629-190.211; p = 0,02) y el alelo HLA-DQB1*04 controlando por SOFA (OR = 9.963; IC del 95% = 1.235-80.358; p = 0,03). CONCLUSIONES: Los nuevos hallazgos de nuestro preliminar estudio de pequeño tamaño muestral fueron que determinados polimorfismos genéticos de los HLA podrían estar asociados con la mortalidad de pacientes COVID-19; sin embargo, son necesarios estudios de mayor tamaño muestral para concluirlo definitivamente


Assuntos
Pessoa de Meia-Idade , Idoso , Humanos , Polimorfismo Genético , Infecções por Coronavirus/complicações , Infecções por Coronavirus/fisiopatologia , Pneumonia Viral/complicações , Pneumonia Viral/fisiopatologia , Betacoronavirus , Prognóstico , Antígenos HLA/análise , Infecções por Coronavirus/virologia , Pneumonia Viral/virologia , Pandemias , Estudos Prospectivos , Unidades de Terapia Intensiva , Modelos Logísticos , APACHE , Escores de Disfunção Orgânica
4.
Gastroenterol. hepatol. (Ed. impr.) ; 43(1): 34-45, ene. 2020. ilus, graf, tab
Artigo em Inglês | IBECS | ID: ibc-188293

RESUMO

Despite unique immunoregulatory properties pointing toward tolerance, the liver allograft can be negatively impacted by humoral alloreactivity, with immediate as well as long-term harmful consequences. With regard to the unmet need of long-term outcomes improvement after liver transplantation, donor-specific antibodies have recently been the matter of intense study in this context. We review here recent advances regarding the understanding of the impact of preformed as well as de novo anti-human leukocyte antigen donor-specific antibodies in liver transplantation and discuss potential strategies to overcome this problem


A pesar de sus propiedades inmunorreguladoras únicas que apuntan a la tolerancia, el aloinjerto hepático puede verse afectado negativamente por la alorreactividad humoral, con consecuencias nocivas inmediatas y también a largo plazo. Recientemente, y en relación con la necesidad no cubierta de mejorar los resultados a largo plazo tras el trasplante de hígado, se han realizado estudios exhaustivos sobre los anticuerpos específicos del donante. En el presente artículo, revisamos los últimos avances a la hora de comprender el impacto de los anticuerpos contra el antígeno leucocitario humano específicos del donante, preformados o de novo, en el trasplante de hígado y estudiamos posibles estrategias para resolver este problema


Assuntos
Humanos , Citotoxicidade Celular Dependente de Anticorpos , Transplante de Fígado , Especificidade de Anticorpos/imunologia , Isoanticorpos/imunologia , Antígenos HLA/imunologia , Especificidade de Órgãos , Terapia de Imunossupressão/métodos , Aloenxertos/imunologia , Imunidade Humoral
9.
Endocrinol. diabetes nutr. (Ed. impr.) ; 64(3): 146-151, mar. 2017. mapas, graf, tab
Artigo em Inglês | IBECS | ID: ibc-171256

RESUMO

Introduction: Incidence of childhood-onset type 1 diabetes mellitus in the Canary Islands is the highest reported so far in Spain, and among the highest worldwide. The HLA region accounts for approximately half the genetic risk of type 1 diabetes. Our aim was to assess distribution of high-risk and protective HLA haplotypes in the Canarian families included in the T1DGC, as compared to the rest of Spain. Methods: The T1DGC study, an international project to study the genetics and pathogenesis of type 1 diabetes, enrolled more than 3000 families with type 1 diabetes worldwide. Spain provided 149 of these families, of whom 42 were from Tenerife and Gran Canaria. HLA was genotyped centrally using a PCR-based, sequence-specific oligonucleotide probe system. Haplotypes were reconstructed using the deterministic algorithm alleHap in the R programming environment. Based on prior T1DGC results in Caucasian population, haplotypes DRB1*0405-DQA1*0301-DQB1*0302, DRB1*0401-DQA1*0301-DQB1*0302, DRB1*0301-DQA1*0501-DQB1*0201, DRB1*0402-DQA1*0301-DQB1*0302 and DRB1*0404-DQA1*0301-DQB1*0302 were considered high-risk. DRB1*0701-DQA1*0201-DQB1*0303, DRB1*1401-DQA1*0101-DQB1*0503, DRB1*1501-DQA1*0102-DQB1*0602, DRB1*1101-DQA1*0501-DQB1*0301, DRB1*1104-DQA1*0501-DQB1*0301, DRB1*1303-DQA1*0501-DQB1*0301, DRB1*1301-DQA1*0103-DQB1*0603 and DRB1*0403-DQA1*0301-DQB1*0302 were considered protective. The distribution of protective, high-risk, and other haplotypes in the (first two) affected siblings and unaffected parents from Canarian and non-Canarian Spanish families was compared (Chi-square test). Results: No significant differences were found between the regions in distribution of the HLA haplotypes in the affected siblings or in the non-affected parents. Conclusions: The high incidence of childhood-onset type 1 diabetes in the Canarian population does not appear to be explained by a greater prevalence of high-risk class II HLA haplotypes in families with the disease. However, sample size limits the differences that can be detected in this study (AU)


Introducción: La incidencia de diabetes tipo 1 infantil en Canarias es la más alta descrita hasta el momento en España y una de las mayores a nivel mundial. La región HLA explica aproximadamente el 50% del riesgo genético de la diabetes tipo 1. Nuestro objetivo fue comparar la frecuencia de haplotipos de HLA de riesgo y protectores en familias españolas canarias y peninsulares incluidas en el T1DGC. Métodos: El T1DGC es un proyecto internacional que estudia la genética y patogenia de la diabetes tipo 1, para el que fueron inluidas más de 3000 familias con la enfermedad. Un total de 149 familias provenían de España, y 42 de ellas, de Tenerife y Gran Canaria. El HLA fue genotipado en un laboratorio central, utilizando un método basado en PCR y sondas específicas de secuencia. Los haplotipos fueron reconstruidos utilizando el algoritmo determinista alleHap en el entorno de programación R. En base a los resultados previos del T1DGC en población caucásica, los haplotipos DRB1*0405-DQA1*0301-DQB1*0302, DRB1*0401-DQA1*0301-DQB1*0302, DRB1*0301-DQA1*0501-DQB1*0201, DRB1*0402-DQA1*0301-DQB1*0302 y DRB1*0404-DQA1*0301-DQB1*0302 fueron definidos como de alto riesgo. DRB1*0701-DQA1*0201-DQB1*0303, DRB1*1401-DQA1*0101-DQB1*0503, DRB1*1501-DQA1*0102-DQB1*0602, DRB1*1101-DQA1*0501-DQB1*0301, DRB1*1104-DQA1*0501-DQB1*0301, DRB1*1303-DQA1*0501-DQB1*0301, DRB1*1301-DQA1*0103-DQB1*0603 y DRB1*0403-DQA1*0301-DQB1*0302 fueron considerados protectores. La distribución de haplotipos de riesgo, protectores y otros en los (dos primeros) hermanos afectos y en los padres no afectos fue comparada entre las familias canarias y no canarias (chi cuadrado). Resultados: No se encontraron diferencias significativas en la distribución de haplotipos HLA entre las regiones estudiadas, ni en los hermanos afectos ni en los padres no afectos. Conclusiones: La alta incidencia de la enfermedad en la población canaria no parece ser explicada por una mayor prevalencia de haplotipos de HLA de clase II de riesgo en los casos con agregación familiar, aunque el tamaño de la muestra limita las diferencias detectables en este estudio (AU)


Assuntos
Humanos , Masculino , Feminino , Diabetes Mellitus Tipo 1/epidemiologia , Antígenos HLA/análise , Haplótipos , Antígenos de Histocompatibilidade/análise , Espanha/epidemiologia , Projetos , Algoritmos
10.
Reumatol. clín. (Barc.) ; 12(2): 85-90, mar.-abr. 2016. tab, ilus
Artigo em Espanhol | IBECS | ID: ibc-150874

RESUMO

La enfermedad de Behçet es una vasculitis caracterizada por úlceras bucales y genitales. La afectación neurológica o neuro-Behçet es una manifestación infrecuente, de predominio en el género masculino y que aparece de 2 a 4 años después de la primera manifestación clínica. El neuro-Behçet cursa ocasionalmente lesiones cerebrales pseudotumorales. Presentamos 2 casos de pacientes diagnosticados de neuro-Behçet tras la detección de lesiones cerebrales pseudotumorales y se realiza una revisión de la literatura (AU)


Behçet‘s disease is a systemic vasculitis characterized by the presence of oral and genital ulcers. Neurological involvement or neuro-Behçet is an uncommon manifestation. It manifestation has predominance in the male gender appearing 2 to 4 years after the first clinical manifestation. However, neuro-Behçet disease sometimes occurs with pseudotumoral brain lesions. Herein, we present the cases of two patients diagnosed with neuro-Behçet after detection of pseudotumoral brain lesions. A review of the literature is performed (AU)


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Síndrome de Behçet/patologia , Síndrome de Behçet , Pseudotumor Cerebral/patologia , Pseudotumor Cerebral , Metilprednisolona/uso terapêutico , Prednisona/uso terapêutico , Colchicina/uso terapêutico , Azatioprina/uso terapêutico , Ciclofosfamida/uso terapêutico , Agressão/fisiologia , Anamnese/métodos , Foliculite/complicações , Foliculite/patologia , Foliculite , Esclerose/complicações , Esclerose , Antígenos HLA/isolamento & purificação , Glucocorticoides/uso terapêutico , Infliximab/uso terapêutico
11.
Inmunología (1987) ; 35(1): 33-36, ene.-mar. 2016. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-153560

RESUMO

La enfermedad celíaca (EC) es una enfermedad sistémica caracterizada por enteropatía crónica y mediada por el sistema inmune, que se desencadena en individuos genéticamente susceptible tras la ingesta de gluten[1]. En Europa, y probablemente también a nivel mundial, la prevalencia en la población general es aproximadamente del 1 %, pero aumenta en ciertos grupos de riesgo, en que se incluyen los familiares de primer grado de los pacientes. En estos individuos el riesgo puede elevarse hasta un 38 %, lo que da idea de la fuerte carga genética asociada a esta patología. De hecho, la concordancia entre gemelos monocigóticos ronda el 80 %, y disminuye hasta el 20 % en gemelos dicigóticos[2-3]. Los diversos estudios que se han desarrollado para desengranar los factores que determinan la heredabilidad de esta enfermedad, describen la principal asociación con genes localizados en la región del HLA (Human Leukocytes Antigen), así como un gran número de variantes génicas distribuidas por todo el genoma que aparecen con mayor frecuencia en la población enferma (AU)


No disponible


Assuntos
Humanos , Doença Celíaca/genética , Antígenos HLA/análise , Genômica/métodos , Marcadores Genéticos , Doenças Genéticas Inatas/diagnóstico
12.
Rev. bioét. derecho ; (36): 55-66, 2016.
Artigo em Espanhol | IBECS | ID: ibc-149263

RESUMO

Se denominan 'bebés medicamento' a, los niños concebidos con el propósito de que sean donantes compatibles para salvar, por medio de la determinación del antígeno leucocitario humano (HLA) de embriones, a un hermano que sufre una enfermedad congénita inmunitaria. Toda esta situación actual genera varios interrogantes éticos sobre el 'uso' o 'utilidad' de estas nuevas técnicas, el presente estudio pretende analizar las cuestiones bioéticas generadas más relevantes (AU)


The so‐called saviour sibling are those babys that were conceive with the purpose to become in compatible donor to save a sibling with immune congenital diseases through the identification of the human leukocyte antigen (HLA). In this entire new frame has born an ethical debate about the use of these techniques. This study tries to analyze the main bioethical question that this new situation provokes (AU)


Assuntos
Humanos , Técnicas de Reprodução Assistida/ética , Antígenos HLA/análise , Direitos Sexuais e Reprodutivos/ética , Temas Bioéticos , Clonagem de Organismos/ética , Pesquisas com Embriões/ética , Criação de Embriões para Pesquisa/ética , Princípios Morais
13.
Rev. neurol. (Ed. impr.) ; 61(7): 301-307, 1 oct., 2015. tab
Artigo em Espanhol | IBECS | ID: ibc-178483

RESUMO

Introducción. El síndrome de apnea obstructiva del sueño (SAOS) es una enfermedad frecuente, compleja y poligénica, con diversas etiologías que interaccionan originando un fenotipo único. El SAOS puede ocurrir a cualquier edad del individuo y se presume la existencia de agregación familiar. Han sido descritos diversos factores de predisposición, como la edad, el sexo y la obesidad. La relación entre los polimorfismos del antígeno leucocitario humano (HLA) y trastornos del sueño está confirmada, tanto en poblaciones europeas como no europeas. No obstante, las relaciones descritas entre los alelos HLA y SAOS no han sido coherentes y carecen de valor informativo para la clasificación del trastorno del sueño. Objetivo. Explorar la asociación genética del HLA con el SAOS en una población del norte de Portugal y evaluar el papel de la obesidad en el contexto del HLA en el SAOS. Pacientes y métodos. Se estudió una cohorte de 131 pacientes con SAOS. Los pacientes fueron atendidos en una clínica del sueño ambulatoria donde se valoraron los antecedentes clínicos, se les practicó una polisomnografía nocturna, una prueba de latencia múltiple del sueño (si lo exigió el diagnóstico diferencial), analíticas y estudios demográficos. A efectos comparativos, se utilizó una población de control de 223 personas sanas. Se efectuó el genotipado del HLA-DRB1 con la reacción en cadena de la polimerasa mediante cebadores de secuencia específica. Resultados. En esta cohorte, el alelo HLA-DRB1*03 fue identificado como un factor de predisposición para el SAOS (24% del SAOS frente a 15% de la población de control; p = 0,025; odds ratio = 1,861; intervalo de confianza al 95% = 1,081-3,205). No hubo diferencias significativas en lo referente a otros alelos HLA-DBR1*. Conclusión. El HLA-DRB1*03 es un factor de predisposición para el SAOS en la población portuguesa


Introduction. The obstructive sleep apnoea syndrome (OSAS) is a common, complex and polygenic disease with diverse aetiologies interacting to produce a single phenotype. OSAS occurs throughout the entire lifespan and familial aggregation has been suggested. Several predisposing factors, as age, gender and obesity have been described. Associations between HLA polymorphisms and sleep disorders are confirmed, in European and Non-European descendent populations. However the associations found between HLA alleles and OSAS have not been consistent and have no informative value for sleep disorder classification. Aims. To explore the genetic association of HLA with OSAS in a northern Portuguese population and to evaluate the role of obesity in the context of HLA in OSAS. Patients and methods. A cohort of 131 patients with OSAS was studied. Patients followed up in an Outpatient Sleep Clinic were assessed by clinical history, night sleep polygraphic recording, multiple sleep latency test (when necessary for differential diagnosis), laboratorial and demographic studies. A control population (CP) of 223 healthy individuals was used for comparison. HLA-DRB1 genotyping was performed using a polymerase chain reaction with sequence specific primers methodology. Results. In this cohort, the HLA-DRB1*03 allele was identified as a susceptibility factor for OSAS (24% OSAS vs. 15% CP; p = 0.025; odds ratio = 1.861; 95% CI = 1.081-3.205). No significant differences were found for other HLA-DBR1* alleles. Conclusion. HLA-DRB1*03 is a susceptibility factor for OSAS in Portuguese population


Assuntos
Humanos , Masculino , Feminino , Genes MHC Classe I , Genes MHC da Classe II , Antígenos HLA/genética , Predisposição Genética para Doença , Apneia Obstrutiva do Sono/genética , Estudos de Coortes , Genótipo , Cadeias HLA-DRB1/genética , Obesidade/epidemiologia , Ambulatório Hospitalar/estatística & dados numéricos , Portugal/epidemiologia , Fatores de Risco , Apneia Obstrutiva do Sono/epidemiologia , Apneia Obstrutiva do Sono/etiologia , Amostragem
14.
Rev. lab. clín ; 8(3): 131-137, jul.-sept. 2015. tab
Artigo em Espanhol | IBECS | ID: ibc-140744

RESUMO

Introducción. Existe un alto número de casos no diagnosticados de enfermedad celiaca, especialmente en individuos de edad avanzada. El objetivo del presente trabajo es determinar el valor predictivo del genotipado de HLA-DQ en el diagnóstico de la enfermedad celiaca en mayores de 50 años y analizar una posible relación entre la gradación de riesgo atribuida a los alelos y el diagnóstico en edad avanzada. Materiales y métodos. Seiscientos treinta y cinco pacientes fueron estudiados durante 2013 con clínica sugestiva de enfermedad celiaca. El diagnóstico fue confirmado mediante estudios serológicos y biopsia intestinal. El genotipado del HLA-DQ se realizó mediante una técnica PCR-SSOP. Resultados. Un 10,7% de los pacientes estudiados eran mayores de 50 años con un ratio hombre mujer 1:3. La frecuencia de los alelos considerados de riesgo para la enfermedad celiaca (HLA-DQ2.5 y/o HLA-DQ8) fue del 87,5% (56 pacientes), siendo celiacos 13 de ellos. Veintiún pacientes portaban solo un alelo del DQ2.5 (DQA1*05 o DQB1*02) sin confirmarse el diagnóstico de celiaquía. Un paciente celiaco confirmado no expresaba ni DQ2 ni DQ8. El valor predictivo positivo del genotipado de HLA-DQ para el diagnóstico de EC en la población mayor de 50 años fue del 29,27% y el valor predictivo negativo del 93%. Conclusiones. Debido al alto valor predictivo negativo, la determinación del HLA-DQ es un marcador útil en el diagnóstico de la EC en individuos de edad avanzada con clínica asociada. No se encontró relación entre los alelos considerados de menor riesgo y la aparición tardía de la enfermedad (AU)


Introduction. Celiac disease is significantly undiagnosed, especially in older individuals. The aim of this study is to determine the predictive value of HLA-DQ typing in the diagnosis of celiac disease in patients over 50 and analyze the possible relationship between the gradation of risk attributed to the alleles and diagnosis in elderly. Materials and methods. 635 patients were studied during 2013 with suggestive symptoms of celiac disease. The diagnosis was confirmed by serologic studies and small bowel biopsy. The HLA-DQ genotyping was performed using a PCR-SSOP technique. Results. 68 of out 635 patients studied (10.7%) were older than 50 years with a male to female ratio of 1:3. The frequency of the alleles that has been associated with risk of CD (HLA DQ2.5 and/or HLA DQ8) was 87.5% (56 patients), being celiac 13 of them. 21 patients carry the half allele of HLA-DQ2.5 (DQA1*05 or DQB1*02) associated with low risk of celiac disease being none of them celiac. One patient with celiac disease did not carry DQ2.5 or DQ8 heterodimers but was positive for serological and histological analysis. The positive predictive value of the use of HLA testing in the population older than 50 years is 29.27% and the negative predictive value is 93%. Conclusions. Due to the high negative predictive value, the determination of HLA-DQ is a useful marker in the diagnosis of CD, in individuals over 50 with associated clinical. There was no relationship between low risk alleles and late onset of disease (AU)


Assuntos
Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Doença Celíaca/diagnóstico , Técnicas de Genotipagem/instrumentação , Técnicas de Genotipagem/métodos , Técnicas de Genotipagem , Antígenos HLA , Teste de Histocompatibilidade/métodos , Antígenos HLA-DQ , Técnicas de Genotipagem/tendências , Biópsia/métodos , Biópsia , Estudos Retrospectivos , Doença Celíaca/sangue , Doença Celíaca/genética
15.
Rev. esp. enferm. dig ; 107(9): 547-553, sept. 2015. tab
Artigo em Inglês | IBECS | ID: ibc-140751

RESUMO

BACKGROUND AND AIM: There are some common genetic features between celiac disease (CD) and diabetes mellitus type 1 (DM). However, the genetic risk factors have not been fully clarified for CD and the co-occurrence of CD and DM. KIR (killer immunoglobulin-like receptor) genes regulate the cytolitic activity of NK-cells and T lymphocytes. The aim of this study is to evaluate the contribution of KIR genes, KIR ligands, and combinations of KIR/ KIR ligands on the genetic predisposition to CD and co-occurrence of CD and DM. MATERIAL AND METHODS: Forty six patients with CD (n = 46), 20 patients with CD+DM (n = 20), and 60 healthy controls (n = 60) were included in this study. KIR genes and KIR ligands were investigated with PCR-SSOP and PCR-SSP in all subjects, respectively. RESULTS: This study showed that while the telomeric KIR genes (2DS5 and 3DS1), and combinations of 3DS1+HLA-BBw4-Thrand 3DS1+HLA-BBw4-Iso- (p < 0.001, p < 0.001, p < 0.001, and p < 0.001, respectively) were observed more frequently in patients with CD than in controls, the 2DS5, 3DS1 KIR genes, C1 ligand, and combinations of 3DS1+HLA-BBw4-Thr- and 3DS1+HLA-BBw4-Iso- (p = 0.002, p = 0.004, p = 0.036, p < 0.001, and p = 0.007, respectively) were observed more frequently in patients with CD+DM than in controls. CONCLUSIONS: The results of this study indicated that some KIR genes, KIR ligands, and KIR/KIR ligand interactions may be responsible for a predisposition to CD and the coexistence of CD and DM. For development of coexisting CD and DM, the 2DS5 and 3DS1 genes, C1 ligand, and combinations of 3DS1+HLA-BBw4- Thr- and 3DS1+HLA-BBw4-Iso- were found to be risk factors


No disponible


Assuntos
Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Adulto Jovem , Receptores KIR/genética , Antígenos HLA , Genes MHC Classe I/genética , Doença Celíaca/complicações , Doença Celíaca/diagnóstico , Diabetes Mellitus Tipo 1/complicações , Diabetes Mellitus Tipo 1/diagnóstico , Fatores de Risco , Estudos de Casos e Controles , Consentimento Livre e Esclarecido/normas , 28599
16.
Rev. esp. enferm. dig ; 107(7): 423-429, jul. 2015.
Artigo em Inglês | IBECS | ID: ibc-137619

RESUMO

BACKGROUND AND AIM: The presence of specific human leukocyte antigen-DQ2 and DQ8 seems to be necessary for celiac disease development, but the real contribution of its typing for screening is still uncertain. We aim to conduct a systematic review and meta-analysis of the diagnostic performance of human leukocyte antigen typing tests for celiac disease screening. METHODS: Systematic review of published studies assessing accuracy of human leukocyte antigen DQ2 and DQ8 typing for the detection of celiac disease were selected. MEDLINE and EMBASE were searched from 1st January 2004 until 31st December 2013. Two independent researchers carried out selection and classification of studies, data extraction and analysis. Meta-analysis combining sensitivities, specificities and likelihood ratios of HLA-DQ2 and DQ8 for the diagnosis of celiac disease were carried out. RESULTS: 6 studies including 1303 individuals were finally evaluated. Pooled sensitivity was 98% (95% confidence interval: 97-99). Overall specificity was 45% (95% confidence interval: 41-48). Regarding specificity, studies were heterogeneous and a subgroup analysis was done according to the type of population included. Overall negative likelihood ratio was 0.05 (0.03-0.09). CONCLUSIONS: Due to its great sensitivity and low negative likelihood ratio, human leukocyte antigen-DQ2/DQ8 typing would be an appropriate test for ruling out celiac disease in the general population suffering related symptoms, and even more in at risk population


No disponible


Assuntos
Feminino , Humanos , Masculino , Antígenos HLA/análise , Antígenos HLA , Doença Celíaca/diagnóstico , Doença Celíaca/epidemiologia , Doença Celíaca/prevenção & controle , Sensibilidade e Especificidade
17.
Inmunología (1987) ; 34(1): 33-34, ene.-mar. 2015. tab, ilus
Artigo em Inglês | IBECS | ID: ibc-143011

RESUMO

Portraying the structure of proteins of immunological interest is an important step to teach complex events of immunology. However this objective faces technical difficulties. In combination with the use of software dedicated to portrait of three-dimension (3D) structures, the democratization of 3D printing provides a unique opportunity for students to manipulate the molecules by themselves and to better understand their structural and functional details. This article describes how 3D printing of a protein belonging to human leukocyte antigen (HLA) system can be implemented and included in a pedagogical scenario for teaching the structure-function relationship of these molecules to students of 3rd year of Immunology (AU)


No disponible


Assuntos
Antígenos HLA/análise , Antígenos HLA , Antígenos HLA/imunologia , Receptores Toll-Like/administração & dosagem , Receptores Toll-Like/imunologia , Aprendizagem , Cristalografia/instrumentação , Cristalografia/métodos , Cristalografia/normas , Estrutura Molecular
18.
Prog. obstet. ginecol. (Ed. impr.) ; 57(10): 458-460, dic. 2014.
Artigo em Inglês | IBECS | ID: ibc-129780

RESUMO

Objective. To describe a patient with primary infertility and recurrent implantation failure (RIF) and coexistence of peripheral blood immunophenotypic dysregulation of lymphocytes and alloimmune and autoimmune abnormalities. The hypothesis is that functionally distinct immunological abnormalities might better explain the immunological etiology of RIF than individual abnormalities in some patients. Subjects and methods. We present clinical and immunological data. Results. A patient with primary infertility and RIF had peripheral blood immunophenotypic abnormalities of T, B and NK-cells, unusually high shared HLA antigens with her partner, and antiphospholipid antibodies. Conclusion. Functionally distinct immunological abnormalities may coexist in some women with RIF after in vitro fertilization (AU)


Objetivo. Describir un caso de fallo recurrente tras fecundación in vitro en el que coexisten varias alteraciones inmunológicas potencialmente relacionadas con este problema. La hipótesis es que esta coexistencia de factores podría explicar mejor la etiología inmunológica que alteraciones individuales. Sujetos y métodos. Se presentan datos clínicos e inmunológicos. Resultados. Una paciente con infertilidad primaria y fallo recurrente tras 4 intentos de fecundacion in vitro tenía alteraciones inmunofenotípicas de células T, B y NK, antígenos compartidos por la pareja en una frecuencia inusualmente alta y anticuerpos antifosfolípidos. Conclusiones. Distintas alteraciones inmunológicas pueden coexistir en casos aislados de fallo recurrente tras fecundación in vitro (AU)


Assuntos
Humanos , Feminino , Adulto , Infertilidade/complicações , Infertilidade/diagnóstico , Infertilidade/terapia , Autoimunidade , Fertilização In Vitro/métodos , Fertilização In Vitro/tendências , Fertilização In Vitro , Células Matadoras Naturais/imunologia , Células Matadoras Naturais/fisiologia , Antígenos HLA , Teste de Histocompatibilidade/métodos , Biomarcadores/análise , Biomarcadores/metabolismo
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