{"ok":true,"nota":{"id":"b8261f2728776940","slug":"los-padres-con-demencia-no-aceleran-el-envejecimiento-del-cerebro-pero-b8261f","titulo":"Los padres con demencia no aceleran el envejecimiento del cerebro, pero sí cambian las defensas","resumen":"Estudiaron a 1.204 adultos de mediana edad para ver si tener padres con demencia se asocia con envejecimiento acelerado en sangre o cerebro. Midieron marcadores epigenéticos, telómeros, células inmunes y resonancias cerebrales.","fuente":"medrxiv","fuenteNombre":"medRxiv · preprints","color":"#1f7a4d","autor":"Winford, E. D., Huber, B. D., Avila-Rieger, J. F., Ryan, C. P., Alshikho, M. J., Turney, I. C., Pyne, J. D., Belsky, D. ","url":"https://www.medrxiv.org/content/10.64898/2026.10.22.26366051v1?rss=1","imagen":"/hoy/portada/b8261f2728776940","tema":"salud","subtemas":["demencia","alzheimer","envejecimiento","sistema inmune","genetica"],"entidades":["medRxiv"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-24T00:00:00.000Z","indexTs":"2026-10-24T15:11:09.033Z","hash":"ca9e8194d743b2ad776f42b768febd043bed6caed82eb3c398ea9ee97a557e4b","tsa":{"time":"Oct 24 15:11:41 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"El dato concreto: no encontraron envejecimiento acelerado del cerebro ni del cuerpo en general, pero sí más células T de memoria CD8 y telómeros algo más cortos. Para alguien de acá con un padre o madre que tuvo demencia, el riesgo parece pasar más por el sistema inmune que por un deterioro generalizado. Eso abre una pregunta incómoda: ¿cuánto de la herencia familiar del Alzheimer se explica por cómo responde la sangre a lo largo de los años? Hay un límite serio: las diferencias en telómeros y otras células fueron leves y no todas resistieron el control estadístico, así que es una pista, no una conclusión.","quienFirma":"medRxiv (preprint; institución principal no identificada en el resumen)","confianza":"preprint","consulta":null},"sello":{"hash":"ca9e8194d743b2ad776f42b768febd043bed6caed82eb3c398ea9ee97a557e4b","sello":"0ad2ec9d30387c511bbecd3dac8bf7aa98c4f0d2693fa6222a80e55796a74d37","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6580789,"aleatorio":"ef445ca14b9cc44e00694e8ae45e556d89bc9472bbb1a10007afd8001ec10ab5","tiempo":"2026-10-24T15:11:30.000Z"},"nist":{"cadena":2,"pulso":1997588,"salida":"4315C380001FD0D890EEE53FF21419B736E831E26AD56DEFA5C2AE6D55D6943F9D0D6E7E8E664DF8290240EFAD7D7019EEA88D2EB8226E778DCCC0E675FE4C53","tiempo":"2026-10-24T15:11:00.000Z"},"noAntes":"2026-10-24T15:11:30.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 24 15:11:41 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Parental Dementia History is Associated with Peripheral Immune Aging Rather than Generalized Biological and Brain Age Acceleration in Midlife","descripcion":"Parental history of dementia is a risk factor for Alzheimer's disease, although the mechanisms underlying this association remain poorly understood. We hypothesize that differences in epigenetic aging may contribute to this increased risk. We examined DNA methylation (DNAm)-based measures of epigenetic aging, telomere length, immune cell composition, and MRI-based measures of brain aging in 1,204 middle-aged adults. Parental dementia history was not associated with accelerated epigenetic or brain aging. However, it was associated with CD8 memory T cell expansion, with nominal differences in CD4 memory T cells, memory B cells, and telomere length. The association with shorter telomere length ","pubDate":"2026-10-24","url":"https://www.medrxiv.org/content/10.64898/2026.10.22.26366051v1?rss=1"},"indexado":"2026-10-24T15:11:09.033Z"}}