title: Amniotic fluid lysozyme activity in fetal distress.
abstract: Lysozyme activity was measured in amniotic fluid samples from 90 pregnant women with gestational age ranging from 30 to 41 weeks. Twenty-nine samples were from high-risk subjects with different pathologies and signs of fetal distress. The control group consisted of 20 normal and 41 pathological pregnant women, whose disorders included Rh isoimmunization, diabetes, systemic arterial hypertension and pre-eclampsia without signs of fetal distress. Amniotic fluid lysozyme levels in normal controls were similar to those detected in abnormal pregnant women without signs of fetal distress (means = 156.0 vs 131.8 micrograms/ml for 34-37 weeks of gestation), with a tendency toward higher values as pregnancy progressed to term (means = 182.1 vs 155.4 micrograms/ml for 38-41 weeks of gestation). Lysozyme levels were significantly lower in high-risk pregnant women with signs of fetal distress, regardless of neonate birth weight, than in subjects showing no such signs (means = 40.3 and means = 25.4 micrograms/ml at 34-37 and 38-41 weeks of gestation, respectively). These data support the possibility of using amniotic fluid lysozyme activity levels as an indicator of fetal distress.
authors.affiliation: Departamento de Pediatria, Faculdade de Medicina, Universidade de São Paulo, Brasil.
authors.forename: M H
authors.initials: MH
authors.lastname: Porto
authors.forename: M A
authors.initials: MA
authors.lastname: Ribeiro
authors.forename: M
authors.initials: M
authors.lastname: Cavanha-Neto
authors.forename: J G
authors.initials: JG
authors.lastname: Franco Júnior
authors.forename: M
authors.initials: M
authors.lastname: Zugaib
authors.forename: M M
authors.initials: MM
authors.lastname: Carneiro-Sampaio
mesh_terms: D000653:Amniotic Fluid / Q000201:enzymology*; D004796:Clinical Enzyme Tests; D005260:Female; D005316:Fetal Distress / Q000175:diagnosis*; D006801:Humans; D009113:Muramidase / Q000032:analysis*; D011247:Pregnancy
chemical_list: D009113:Muramidase