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4.
Nat Commun ; 6: 5966, 2015 Jan 22.
Artigo em Inglês | MEDLINE | ID: mdl-25608926

RESUMO

Alopecia areata (AA) is a prevalent autoimmune disease with 10 known susceptibility loci. Here we perform the first meta-analysis of research on AA by combining data from two genome-wide association studies (GWAS), and replication with supplemented ImmunoChip data for a total of 3,253 cases and 7,543 controls. The strongest region of association is the major histocompatibility complex, where we fine-map four independent effects, all implicating human leukocyte antigen-DR as a key aetiologic driver. Outside the major histocompatibility complex, we identify two novel loci that exceed the threshold of statistical significance, containing ACOXL/BCL2L11(BIM) (2q13); GARP (LRRC32) (11q13.5), as well as a third nominally significant region SH2B3(LNK)/ATXN2 (12q24.12). Candidate susceptibility gene expression analysis in these regions demonstrates expression in relevant immune cells and the hair follicle. We integrate our results with data from seven other autoimmune diseases and provide insight into the alignment of AA within these disorders. Our findings uncover new molecular pathways disrupted in AA, including autophagy/apoptosis, transforming growth factor beta/Tregs and JAK kinase signalling, and support the causal role of aberrant immune processes in AA.


Assuntos
Alopecia em Áreas/genética , Proteínas Reguladoras de Apoptose/genética , Ataxina-2/genética , Predisposição Genética para Doença , Antígenos HLA/genética , Proteínas de Membrana/genética , Polimorfismo de Nucleotídeo Único , Proteínas/genética , Proteínas Proto-Oncogênicas/genética , Proteínas Adaptadoras de Transdução de Sinal , Alelos , Animais , Proteína 11 Semelhante a Bcl-2 , Estudos de Casos e Controles , Feminino , Estudo de Associação Genômica Ampla , Humanos , Peptídeos e Proteínas de Sinalização Intracelular , Masculino , Camundongos , Microscopia de Fluorescência , Análise de Sequência com Séries de Oligonucleotídeos , Fenótipo , Análise de Componente Principal , Conformação Proteica , Pele/metabolismo
6.
J Arthroplasty ; 28(7): 1125-9, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-23523207

RESUMO

Obesity affects a disproportionate proportion of total knee arthroplasty (TKA) patients. Our study explores pre-operative characteristics between obese and non-obese patients undergoing TKA surgery. A cohort of 4718 osteoarthritic patients, undergoing primary TKA, was studied. Patients were stratified according to BMI classes. Each class was compared in terms of age, race, gender, level of education, insurance status, pre-operative WOMAC, SF-36, and Elixhauser comorbidities. There was a positive relationship between BMI and female gender, non-white race, Medicaid, private insurance, and self-pay. A negative relationship was observed between BMI and age, Medicare, WOMAC and SF-36. Obese TKA candidates differ from their non-obese counterparts in a number of demographic, socioeconomic, and clinical characteristics.


Assuntos
Artroplastia do Joelho , Obesidade/complicações , Osteoartrite do Joelho/cirurgia , Fatores Etários , Idoso , Análise de Variância , Índice de Massa Corporal , Distribuição de Qui-Quadrado , Comorbidade , Avaliação da Deficiência , Feminino , Humanos , Cobertura do Seguro/estatística & dados numéricos , Masculino , Medicaid , Pessoa de Meia-Idade , Obesidade/etnologia , Estudos Prospectivos , Sistema de Registros , Fatores de Risco , Fatores Sexuais , Estados Unidos
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