Determinantes Farmacogenómicos de la Diabetes Mellitus Postrasplante Hepático: Una Revisión Sistemática y un Análisis Farmacogenómico in Silico.

Autores/as

Palabras clave:

Tacrolimus, Farmacogenética, Trasplante Hepático, Diabetes Mellitus

Resumen

El tacrolimus sigue siendo fundamental en el trasplante hepático, pero su estrecho margen terapéutico y su variabilidad farmacocinética se asocian a un mayor riesgo de diabetes mellitus postrasplante (DMPT). Si bien los polimorfismos en las enzimas metabolizadoras modulan la exposición al fármaco y el riesgo diabetogénico, esta relación no se ha integrado sistemáticamente mediante enfoques farmacogenómicos específicos. Este estudio tuvo como objetivo evaluar sistemáticamente las variantes genéticas en los genes metabolizadores de tacrolimus y su asociación con la DMPT mediante un análisis farmacogenómico in silico integrado. Se realizó un análisis in silico integrando datos de repositorios públicos (PharmGKB), literatura especializada y anotaciones funcionales de variantes genéticas. Se desarrollaron modelos de aprendizaje automático utilizando datos sintéticos generados a partir de tamaños del efecto derivados de la literatura para demostrar la viabilidad del concepto. Priorizamos los genes (CYP3A5, CYP3A4, ABCB1) basándonos en los niveles de evidencia de PharmGKB, el impacto funcional y las asociaciones clínicas con la exposición al tacrolimus y el riesgo de profilaxis postexposición (PEP), incorporando información genotípica, dosis del fármaco y resultados metabólicos. El alelo CYP3A5*1 emergió como un determinante clave, requiriendo consistentemente dosis de tacrolimus de 1,5 a 2,8 veces mayores y confiriendo un riesgo significativamente elevado de PTPD en comparación con los no expresores, un efecto mediado por la exposición acumulada al fármaco. En la revisión sistemática y el modelado sintético, los portadores de alelos funcionales CYP3A5 con genotipos expresores exhibieron un riesgo significativamente mayor de PTPD en comparación con los no expresores, demostrando una clara relación dosis-exposición-toxicidad. Por el contrario, CYP3A4 y ABCB1 mostraron solo evidencia sugestiva, pero heterogénea, de asociación. Este estudio farmacogenómico in silico demuestra una asociación clínicamente significativa entre la variabilidad genética en el metabolismo del tacrolimus y el desarrollo de DMPT postrasplante. Estos hallazgos respaldan las estrategias basadas en el genotipo para optimizar la terapia inmunosupresora y promover la medicina de precisión en la atención postrasplante.

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Publicado

2026-08-11

Cómo citar

1.
Andrade LJ de O, Paraná R, Oliveira GCM de, Bittencourt AMV, Salles OJ de M, Oliveira LM de. Determinantes Farmacogenómicos de la Diabetes Mellitus Postrasplante Hepático: Una Revisión Sistemática y un Análisis Farmacogenómico in Silico. bjt [Internet]. 11 de agosto de 2026 [citado 16 de octubre de 2026];29. Disponible en: https://bjt.emnuvens.com.br/revista/article/view/786

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