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[Alpha-1-antitrypsin in the newborn with idiopathic respiratory distress syndrome]
Insights
Newborns with respiratory distress syndrome (RDS) have lower plasma alpha-1-antitrypsin (a-l-AT) and protein levels at 24 hours. Levels increase by 72 hours, suggesting a-l-AT quantification aids RDS diagnosis.
Area of Science:
- Neonatal Medicine
- Biochemistry
- Pulmonary Medicine
Background:
- Respiratory Distress Syndrome (RDS) is a significant cause of morbidity and mortality in newborns.
- Plasma protein levels, including alpha-1-antitrypsin (a-l-AT), may be altered in neonatal conditions.
- Understanding these biochemical markers is crucial for early diagnosis and management of RDS.
Purpose of the Study:
- To investigate the plasma concentrations of alpha-1-antitrypsin (a-l-AT) and total proteins in newborns with RDS.
- To compare these concentrations with those in healthy control infants.
- To evaluate the diagnostic utility of a-l-AT quantification for RDS.
Main Methods:
- Plasma samples were collected from 50 newborns diagnosed with RDS and 41 healthy controls.
- Blood samples were analyzed at three time points: 24, 72, and 120 postnatal hours.
- Concentrations of a-l-AT and total proteins were measured using established biochemical assays.
Main Results:
- At 24 hours postnatal, infants with RDS exhibited significantly lower plasma a-l-AT (187.5 +/- 9 mg/dl) and total protein (4.15 +/- 0.09 g.%) levels compared to controls.
- By 72 hours, a-l-AT and total protein concentrations increased in the RDS group, while control levels remained stable.
- A decrease in total protein was partly attributed to a reduction in the globulin fraction.
Conclusions:
- Plasma a-l-AT and total protein levels are significantly reduced in newborns with RDS during the early postnatal period.
- The dynamic changes in these protein concentrations over the first 72 hours of life may reflect disease progression or recovery.
- Quantification of plasma a-l-AT shows potential as a valuable diagnostic biomarker for Respiratory Distress Syndrome in neonates.
Abstract:
The study included 50 newborns with (RDS) and 41 controls in relation with the plasma concentration of alpha-antitrypsin (a-l-AT) and of proteins. The blood samples were taken at 24, 72 and 120 postnatal hours. At 24 hours, in infants with IRDS 187.5 +/- 9 mg/dl of a-l-AT were shown and 4.15 +/- 0.09 g. % of total proteins, which compared with concentrations of a-l-AT and total proteins in controls of the same age, turned out significantly lower. The a-l-AT and total proteins suffered increment in their concentrations at 72 hours of life in relation to control cases in whom there was no modifications in the course of postnatal age. Among other factors, a drop in total protein was considered related to the drop in globulin fraction. The usefulness of quantification of a-l-AT for the diagnosis of IRDS, is pointed out at the end.