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Interferencia de Hb J-Sardegna en la cuantificación de HbA1c en un paciente diabético
Clinical laboratory
|February 11, 2026
Resumen
Este estudio identifica la rara variante de hemoglobina J-Sardegna que interfiere con las pruebas de HbA1c. Esta rara variante de hemoglobina puede causar falsos resultados elevados de HbA1c en pacientes diabéticos.
Área de la Ciencia:
- Química clínica es la química clínica.
- Hematología Hematología.
- Genética La genética.
Sus antecedentes:
- La hemoglobina (Hb) J-Sardegna es una rara variante de Hb.
- No se documentó ninguna interferencia previa con la cuantificación de HbA1c.
- Este estudio informa el primer caso de Hb J-Sardegna que afecta las mediciones de HbA1c.
Objetivo del estudio:
- Para informar la identificación incidental de Hb J-Sardegna en un paciente diabético.
- Para investigar la discordancia entre los niveles de glucosa en sangre y los niveles de HbA1c.
- Para resaltar la interferencia de Hb J-Sardegna con la cuantificación de HbA1c.
Principales métodos:
- Cribado de la diabetes que incluye la medición de la glucosa plasmática y la HbA1c.
- Cuantificación de HbA1c mediante cromatografía líquida de alto rendimiento (HPLC).
- Análisis de la fracción de Hb por electroforesis capilar (EC) y secuenciación de Sanger para la confirmación de la variante.
Principales resultados:
- Marcadamente elevados niveles de glucosa con una HbA1c desproporcionadamente alta (32,23%).
- CE identificó una fracción anormal de Hb J (31,8%).
- La secuenciación de Sanger confirmó Hb J-Sardegna (HBA2: c.151C> G) y una variante intrónica (HBA1: c.301-61T> C).
Conclusiones:
- Hb J-Sardegna puede interferir con la cuantificación de HbA1c.
- Esta interferencia conduce a valores falsamente elevados de HbA1c.
- Los técnicos de laboratorio deben interpretar cuidadosamente los perfiles cromatográficos para obtener resultados precisos de HbA1c.
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