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Manifestaciones Clínicas

Akira Arakawa1, Tomoyasu Matsubara1, Manato Hara1

  • 1Brain Bank for Aging Research, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Tokyo, Japan.

Alzheimer's & dementia : the journal of the Alzheimer's Association
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Resumen

La enfermedad de gránulos argirófilos (AGD) está relacionada con la demencia, particularmente en la etapa III de Saito. Los síntomas de parkinsonismo, incluida la inestabilidad postural, también pueden presentarse comúnmente en pacientes con AGD.

Palabras clave:
Enfermedad de gránulos argirófilosDemenciaParkinsonismoEtapa de SaitoNeuropatologíaEstudios de autopsia

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Área de la Ciencia:

  • Neuropatología
  • Medicina Geriátrica
  • Enfermedades Neurodegenerativas

Sus antecedentes:

  • La enfermedad de gránulos argirófilos (AGD) es una neuropatología relacionada con la edad caracterizada por gránulos argirófilos y un patrón de distribución secuencial (etapa de Saito).
  • Las asociaciones clínicas de la AGD con la demencia y el parkinsonismo siguen siendo objeto de debate.
  • Este estudio tuvo como objetivo aclarar estas asociaciones utilizando una cohorte de autopsias japonesa.

Objetivo del estudio:

  • Investigar la relación clinicopatológica entre la enfermedad de gránulos argirófilos (AGD) y la demencia.
  • Determinar la asociación de la AGD con el parkinsonismo.
  • Analizar el impacto de la etapa de Saito en la gravedad de la demencia.

Principales métodos:

  • Análisis retrospectivo de 452 casos de autopsia de la cohorte del Banco de Cerebros para la Investigación del Envejecimiento (BBAR) (2012-2022).
  • Evaluación de la edad, la etapa de Saito y las puntuaciones CDR en relación con la presencia de AGD.
  • Selección de casos de AGD pura con demencia (CDR ≥ 1, etapa de Braak ≤ 2, etapa de Lewy BBAR ≤ 1) para un examen detallado de las características clínicas.

Principales resultados:

  • La AGD estuvo presente en el 50,2 % (227/452) de los casos, con una prevalencia y una etapa de Saito que aumentaron con la edad.
  • Los casos positivos para AGD mostraron tasas significativamente más altas de demencia (46,7 %) y puntuaciones CDR (1,2 ± 1,2) en comparación con los casos negativos para AGD (27,1 %, 0,8 ± 1,2).
  • Los casos de etapa III de Saito exhibieron las tasas más altas de demencia (77,6 %) y puntuaciones CDR (1,7 ± 1,0).
  • Seis de los 20 casos de demencia por AGD pura presentaron parkinsonismo.

Conclusiones:

  • La enfermedad de gránulos argirófilos (AGD) está fuertemente asociada con la demencia, particularmente en las etapas avanzadas de Saito.
  • El parkinsonismo, especialmente la inestabilidad postural, es una manifestación clínica potencial de la AGD.
  • Estos hallazgos resaltan el impacto significativo de la AGD en la función cognitiva y motora en las poblaciones que envejecen.