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Efecto de diferentes condiciones de almacenamiento y diferentes tiempos de detección en los resultados de la proteína
Clinical laboratory
|February 11, 2026
Resumen
Las condiciones de almacenamiento y el tiempo tienen un impacto significativo en la detección de la proteína de muerte celular programada 1 (PD-1) en la sangre periférica. Para obtener resultados precisos de citometría de flujo (FCM), limite la detección a 8 horas a 4 °C o 4 horas a temperatura ambiente después de la preparación de la muestra.
Área de la Ciencia:
- Inmunología Inmunología.
- Diagnóstico Clínico El diagnóstico clínico.
- Análisis biomédico Análisis biomédico.
Sus antecedentes:
- La detección precisa de la proteína de muerte celular programada 1 (PD-1) es crucial para el diagnóstico clínico.
- La citometría de flujo (FCM) es un método común para el análisis de PD-1 en la sangre periférica.
- Comprender el impacto de las variables preanalíticas como el almacenamiento es esencial para obtener resultados confiables.
Objetivo del estudio:
- Para investigar el efecto de las diferentes condiciones de almacenamiento (4 °C frente a la temperatura ambiente) y los tiempos de detección en la expresión de PD-1 en muestras de sangre periférica.
- Determinar los protocolos óptimos de almacenamiento y manipulación para el análisis de PD-1 utilizando FCM.
- Para garantizar la precisión y estabilidad de los resultados de detección de PD-1.
Principales métodos:
- Se analizaron muestras de sangre periférica de 68 pacientes hospitalizados utilizando FCM.
- Las suspensiones de células se almacenaron a 4 ° C y temperatura ambiente, protegidas de la luz.
- Las muestras se analizaron 0, 4, 8 y 24 horas después de la preparación para evaluar la expresión de PD-1 en varias poblaciones celulares.
Principales resultados:
- El almacenamiento a 4 ° C no mostró cambios significativos en los resultados de PD-1 durante hasta 8 horas, con una disminución significativa a las 24 horas.
- El almacenamiento a temperatura ambiente no mostró diferencias significativas a las 4 horas, pero disminuciones significativas a las 8 y 24 horas.
- La estabilidad de siete poblaciones de células medidas, incluidas las células que expresan PD-1, se vio afectada por la duración y la temperatura de almacenamiento.
Conclusiones:
- El tiempo de detección de PD-1 es crítico en la preparación posterior a la muestra.
- Para las muestras almacenadas a 4°C, la detección debe ser dentro de las 8 horas.
- Para las muestras almacenadas a temperatura ambiente, la detección debe ser dentro de las 4 horas para mantener la precisión del resultado.
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