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Vol. 44. Issue 2.
Pages 69-74 (January 2001)
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Vol. 44. Issue 2.
Pages 69-74 (January 2001)
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Actividad urinaria del N-acetil-beta-glucosaminidasa (NAG) durante la gestación normal
Urinary activity of N-acetyl-betaglucosaminidase in normal pregnancy
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J.L. Gallo*
Servicio de Obstetricia y Ginecología. Hospital de Motril. Granada
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Resumen
Objetivo

Determinar la excreción urinaria de Nacetil- beta-glucosaminidasa (NAG) en mujeres con gestación normal, a fin de conocer su actividad en los diferentes trimestres del embarazo. Comparar los cambios ocurridos en esta enzima tubular con otros parámetros de función renal

Población

Un total de 96 mujeres, 26 de ellas no gestantes tomadas como grupo control y 70 gestantes con embarazo normal

Principales determinaciones

Actividad de la NAG en orina de 24 h siguiendo el método espectrofotométrico de Horak. También, determinación de otros parámetros de función renal

Resultados

La excreción urinaria de la NAG en el grupo control (mujeres no embarazadas) fue de 11,24 ± 7,33U/g de creatinina; en las gestantes, sus valores fueron 8,76 ± 3,43 (primer trimestre), 15,75 ± 6,73 (segundo trimestre) y 23,90 ± 6,64 (tercer trimestre), sin encontrarse diferencias significativas entre los grupos de mujeres no embarazadas y embarazadas de primer y segundo trimestre y sí entre los grupos de mujeres no gestantes y gestantes del tercer trimestre (p<0,01). Igualmente, hay diferencias significativas entre embarazadas de primer y tercer trimestre (p<0,01). Por otra parte, no se observa correlación significativa de la NAG con el aclaramiento de creatinina y creatinina urinaria, pero sí con el ácido úrico sérico y con la calicreína

Conclusiones

El ascenso de la actividad urinaria de la NAG en la última fase de la gestación nos indica que es en este momento cuando se producen los mayores cambios en la función tubular

Palabras clave:
N-acetil-beta-glucosaminidasa urinaria
Gestación
Urinary activity of N-acetyl-betaglucosaminidase in normal pregnancy
Aim

To determine urinary excretion of N-acetylbeta- glucosaminidase in women with uncomplicated pregnancies in order to determine its activity in different trimesters. We also compare the changes in this tubular enzyme with other classical parameters of renal function

Population

We studied 96 women, 70 with normal pregnancy and 26 non-pregnant women as control group

Main outcome measures

Urinary excretion of N-acetyl-beta-glucosaminidase was measured using the spectrophotometric method developed by Horak. Other parameters of renal function were also determined

Results

Urinary excretion of N-acetyl-betaglucosaminidase was 11.24 ± 7.33U/g creatinine in the control group and 8.76 ± 3.43U/g creatinine in pregnant women in the first trimester, 15.75 ± 6.73U/g creatinine in the second and 23.90 ± 6.64U/g creatinine in the third. No significant differences in urinary N-acetyl-beta-glucosaminidase were found between pregnant and nonpregnant women in the first trimester but differences between groups were significant (p<0.01) in the third trimester. Significant differences (p<0.01) were found between the first and third trimester in pregnant women. No significant differences in urinary N-acetyl-beta-glucosaminidase were found between creatinine clearance and urinary creatinine but significant differences were found between serum uric acid and urinary kallikrein

Conclusions

The results suggest that the increase in N-acetyl-beta-glucosaminidase during the third trimester coincides with greater changes in tubular function

Keywords:
N-acetyl-beta-glucosaminidase
Pregnancy
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Copyright © 2001. Sociedad Española de Ginecología y Obstetricia
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