RESUMEN
INTRODUCTION: Rheumatoid arthritis (RA) is a chronic, systemic, inflammatory and multifactorial disease. Genetic predisposition seems to play an important role. The aim of this study is to explore the relationship between human leukocyte antigen (HLA)-DRB1 alleles and susceptibility, clinical and biological features of RA in an Algerian patient population. METHODS: Using polymerase chain reaction - sequence specific primers (SSP), 134 RA patients and 132 healthy controls were genotyped for HLA-DRB1 and HLA-DRB1*04 subtypes. RESULTS: HLA-DRB1*04 was found to have increased frequency in the RA group compared to controls (P < 0.001, OR = 3.14), and was associated with anti-citrullinated protein antibodies positivity (ACPA) (P = 0.01, OR = 2.35). In contrast, HLA-DRB1*07 was found to have a decreased frequency in patients compared to controls (P = 0.003, OR = 0.44) and significant decrease was observed in patients with the rheumatoid factor (RF) positivity subgroup (P = 0.009, OR = 0.29). HLA-DRB1*04:05 was associated with RA (P = 0.005, OR = 3.41), whereas, HLA-DRB1*04:02 showed a protective effect against RA (P = 0.003, OR = 0.20). CONCLUSIONS: HLA-DRB1*04 was associated with increased risk for RA and ACPA positivity, while HLA-DRB1*07 was associated with reduced risk for RA and RF synthesis in Algerian patients.
Asunto(s)
Artritis Reumatoide/genética , Cadenas HLA-DRB1/genética , Adulto , Argelia , Anticuerpos Antiproteína Citrulinada/sangre , Artritis Reumatoide/sangre , Artritis Reumatoide/diagnóstico , Artritis Reumatoide/inmunología , Biomarcadores/sangre , Estudios de Casos y Controles , Distribución de Chi-Cuadrado , Femenino , Frecuencia de los Genes , Estudios de Asociación Genética , Marcadores Genéticos , Predisposición Genética a la Enfermedad , Cadenas HLA-DRB1/inmunología , Humanos , Masculino , Persona de Mediana Edad , Oportunidad Relativa , Fenotipo , Factores Protectores , Factor Reumatoide/sangre , Factores de Riesgo , Adulto JovenRESUMEN
A glycopeptide-resistant Enterococcus faecium (EFRG) was isolated from a wound in a patient hospitalized in a university hospital in Algiers. This strain was resistant to several antibiotics. This patient was carrying this strain in the digestive tract which may partly explain its origin. Genotypic comparison of the two strains by pulsed field gel electrophoresis showed that it was the same strain. Glycopeptide resistance was due to the presence of the vanA gene. Vigilance is required facing the emergence of strains of EFRG in our hospitals.
