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Consorcio de Imagenología de Alzheimer

Meng Jiang1, Nelly Joseph-Mathurin1, Yong Wang2

  • 1Washington University School of Medicine, St. Louis, MO, USA.

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Resumen
Este resumen es generado por máquina.

La imagen por resonancia magnética de espectro de difusión generalizada (g-DBSI) muestra potencial para detectar la neuroinflamación y el edema vasogénico asociados con las anomalías de imagen relacionadas con el amiloide (ARIA-E) durante la terapia con anticuerpos monoclonales para la enfermedad de Alzheimer (EA). Esta técnica avanzada de RM puede ayudar a monitorear la progresión de ARIA y comprender los mecanismos subyacentes.

Palabras clave:
Imagenología cerebralResonancia magnéticaEnfermedad de AlzheimerNeuroinflamaciónEdemaAnomalías de imagen relacionadas con el amiloideTerapia con anticuerpos monoclonalesg-DBSI

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Área de la Ciencia:

  • Neuroimagen
  • Técnicas avanzadas de RM
  • Investigación de neuroinflamación

Sus antecedentes:

  • Las anomalías de imagen relacionadas con el amiloide (ARIA), que incluyen edema vasogénico (ARIA-E) y lesiones hemorrágicas (ARIA-H), plantean desafíos en la terapia con anticuerpos monoclonales (mAb) para la enfermedad de Alzheimer (EA).
  • Los mecanismos subyacentes de ARIA, en particular la neuroinflamación, no se comprenden bien.
  • Los métodos de imagen avanzados como la imagen por resonancia magnética de espectro de difusión generalizada (g-DBSI) son esenciales para investigar estos procesos.

Objetivo del estudio:

  • Utilizar g-DBSI para explorar alteraciones microestructurales relacionadas con la neuroinflamación y el edema vasogénico durante el desarrollo y la resolución de ARIA-E en pacientes que reciben tratamiento con anticuerpos monoclonales.
  • Evaluar el potencial de g-DBSI para detectar signos tempranos de ARIA-E y monitorear su progresión.

Principales métodos:

  • Un estudio piloto que involucró a tres participantes que recibieron Gantenerumab en el ensayo DIAN-TU-001, con exploraciones longitudinales de g-DBSI.
  • Evaluación de ARIA por un panel de neurorradiología utilizando las directrices de la FDA y la presentación de informes estructurados.
  • Cuantificación de la relación de restricción (RR) derivada de g-DBSI como marcador de inflamación y la relación de impedancia (HR) para el edema vasogénico dentro de las regiones de ARIA-E.

Principales resultados:

  • El Participante 1 mostró RR y FC elevados un mes antes del inicio de ARIA-E.
  • El Participante 2 presentó RR y FC elevados durante el inicio de ARIA-E, con disminuciones significativas a los dos años de seguimiento.
  • El Participante 3 mostró RR y FC estables entre los seguimientos de 1 y 2 años posteriores a la resolución de ARIA-E.

Conclusiones:

  • Los hallazgos sugieren un papel de la neuroinflamación en la progresión de ARIA-E.
  • g-DBSI demuestra potencial para detectar cambios microestructurales que preceden al inicio de ARIA-E.
  • g-DBSI puede servir como una herramienta no invasiva para monitorear la progresión de ARIA y comprender la neuroinflamación y el edema, lo que justifica una mayor investigación en cohortes más grandes.