Resumen
Objetivo: Evaluar y comparar la concentración proteica en muestras de saliva total sometidas a variaciones metodológicas en el procesamiento preanalítico. Métodos: Se recolectó saliva total de 10 participantes de 23 a 65 años (edad promedio: 31,10 ± 4,059) y se calculó el flujo salival (mL/min). Las muestras se fraccionaron y dividieron en seis grupos distintos (G1–G6), cada uno correspondiente a un protocolo preanalítico diferente que combinaba los siguientes factores: centrifugación, uso de inhibidor de proteasas, temperatura y tiempo de almacenamiento. La concentración de proteínas totales se cuantificó por duplicado mediante el método del ácido bicinconínico (BCA), con significancia estadística establecida en p < 0,05. Resultados: La concentración media de proteínas totales mostró una correlación negativa significativa con el flujo salival en G1 (r = −0,794; p = 0,020), G4 (r = −0,690; p = 0,027) y G5 (r = −0,626; p = 0,05). Las proteínas totales y la edad presentaron una correlación significativa en G3 (rho = 0,762; p = 0,01). No se observaron diferencias estadísticamente significativas en la concentración media de proteínas totales entre los grupos (F(5,45) = 1,132; p = 0,358). Tampoco hubo diferencias al comparar las medias de proteínas totales normalizadas según el flujo salival (F(5,45) = 2,068; p = 0,087). Conclusión: Las variaciones en los protocolos de procesamiento de muestras de saliva no alteraron significativamente las concentraciones de proteínas totales en este fluido.
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