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Uroguanylin level in umbilical cord blood
H Tsukahara1, K Sekine, M Uchiyama
1Department of Pediatrics, Fukui Medical University, Fukui, Japan. htsuka@fmsrsa.fukui-u.ac.jp
Summary
Uroguanylin, a peptide found in urine, is present at higher levels in umbilical cord plasma than in adults. This suggests a role in perinatal adaptation.
Area of Science:
- Endocrinology
- Perinatal Physiology
- Neuropeptide Research
Background:
- Uroguanylin is a recently identified natriuretic and diuretic peptide.
- This peptide was initially isolated from human urine.
Purpose of the Study:
- To investigate the physiological role of uroguanylin during the perinatal period.
- To measure uroguanylin levels in umbilical cord plasma at delivery.
Main Methods:
- Radioimmunoassay was used to quantify uroguanylin concentrations.
- Measurements were taken from umbilical cord plasma samples.
- Cord serum osmolality was also measured for comparison.
Main Results:
- Mean cord plasma uroguanylin concentrations were elevated compared to adult levels.
- Uroguanylin levels showed a significant positive correlation with cord serum osmolality.
- Factors like gestational maturity, delivery mode, and infant gender did not influence uroguanylin levels.
Conclusions:
- The findings indicate a potential regulatory function for uroguanylin in perinatal adaptation.
- This peptide may play a role in the cardiovascular and renal adjustments occurring around birth.