Comisión de terapias biológicas. ¿Qué nos aporta?

Objetivo: Evaluar el impacto general a nivel asistencial de una comisión de terapias biológicas, en enfermedades inflamatorias inmunomediadas, mediante los hábitos de prescripción, los estudios prebiológicos y la inmunización. Método: Se realizó un estudio cuasiexperimental sobre todos los pacientes naïve mayores de edad que iniciaron tratamiento con un medicamento biológico por enfermedad inflamatoria inmunomediada el año anterior y el año posterior a la creación de la comisión de terapias biológicas. Resultados: Se incluyeron un total de 31 pacientes estudiados en 2016 y 40 pacientes estudiados en 2018. La prescripción de medicamentos inhibidores del factor de necrosis tumoral α se redujo en 2018 (80,6% versus 45,0%;

Multiancestry analysis of the HLA locus in Alzheimer’s and Parkinson’s diseases uncovers a shared adaptive immune response mediated by HLA-DRB1*04 subtypes

Across multiancestry groups, we analyzed Human Leukocyte Antigen (HLA) associations in over 176,000 individuals with Parkinson’s disease (PD) and Alzheimer’s disease (AD) versus controls. We demonstrate that the two diseases share the same protective association at the HLA locus. HLA-specific fine-mapping showed that hierarchical protective effects of HLA-DRB1*04 subtypes best accounted for the association, strongest with HLA-DRB1*04:04 and HLA-DRB1*04:07, and intermediary with HLA-DRB1*04:01 and HLA-DRB1*04:03. The same signal was associated with decreased neurofibrillary tangles in postmortem brains and was associated with reduced tau levels in cerebrospinal fluid and to a lower extent with increased Aβ42. Protective HLA-DRB1*04 subtypes strongly bound the aggregation-prone tau PHF6 sequence, however only when acetylated at a lysine (K311), a common posttranslational modification central to tau aggregation. An HLA-DRB1*04-mediated adaptive immune response decreases PD and AD risks, potentially by acting against tau, offering the possibility of therapeutic avenues

Rituximab intravítreo como tratamiento de la recidiva de un linfoma no Hodgkin a nivel intraocular

Caso clínico: Mujer de 58 años que presenta una recidiva de un linfoma difuso de células B grandes a nivel intraocular. Inicia tratamiento con rituximab intravítreo (1 mg/0,1 ml) con pauta semanal durante 4 semanas. Tras 12 meses de la última administración de rituximab intravítreo no se observan lesiones compatibles con linfoma ni reacciones adversas asociadas a su administración. Discusión: El rituximab intravítreo ha resultado efectivo y seguro para el tratamiento de la recaída del linfoma no Hodgkin a nivel intraocular, induciendo su remisión completa y resultando ser una buena alternativa respecto a otras opciones terapéuticas con mayor número de reacciones adversas graves

New insights into the genetic etiology of Alzheimer’s disease and related dementias

Characterization of the genetic landscape of Alzheimer’s disease (AD) and related dementias (ADD) provides a unique opportunity for a better understanding of the associated pathophysiological processes. We performed a two-stage genome-wide association study totaling 111,326 clinically diagnosed/‘proxy’ AD cases and 677,663 controls. We found 75 risk loci, of which 42 were new at the time of analysis. Pathway enrichment analyses confirmed the involvement of amyloid/tau pathways and highlighted microglia implication. Gene prioritization in the new loci identified 31 genes that were suggestive of new genetically associated processes, including the tumor necrosis factor alpha pathway through the linear ubiquitin chain assembly complex. We also built a new genetic risk score associated with the risk of future AD/dementia or progression from mild cognitive impairment to AD/dementia. The improvement in prediction led to a 1.6- to 1.9-fold increase in AD risk from the lowest to the highest decile, in addition to effects of age and the APOE ε4 allele