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Biomedical subjects

G Tortorolo

Publications and source records attributed to G Tortorolo.

At least 55 records · Page 3Linked to original sources
PubMed1987

Antithrombin III in full-term and pre-term newborn infants: three cases of neonatal diagnosis of AT III congenital defect.

Antithrombin III (AT III) plasma levels were investigated in 18 full term neonates and 14 healthy preterm neonates. A control group of 20 healthy adults was also studied. AT III was measured as antigen concentration (Ag) and antithrombin or anti-factor Xa heparin cofactor (H.C.) activities. Crossed immunoelectrophoresis on heparin-agarose (H-CIE) was carried out on plasma samples; moreover the distribution of isoantithrombins was investigated on whole plasma by a technique of crossed immunoelectrofocusing (CIEF). AT III plasma levels in full term infants were significantly lower as compared to the adult values. The preterm newborns group showed a further significant decrease in AT III levels as compared to the full term neonates. In all infants AT III H-CIE runs displayed a single fast moving anodal peak, so that a normal binding to heparin was demonstrated. The CIEF AT III plasma pattern of the adults as well as of all neonates displayed three major peaks at pH range 5.2-4.9, a small amount of AT III at pH 4.9-4.8 and a minor peak at pH 4.8-4.6, so that it was concluded that the isoantithrombins plasma distribution in neonatal age is identical to that of the adult subjects. Four neonates whose mothers were affected by AT III congenital defect were also investigated: diagnosis of congenital deficiency was established in three cases.

Adult↗
PubMed1987

Plasma thyrocalcitonin and parathyroid hormone concentrations in early neonatal hypocalcaemia.

During the first week of life serum calcium, phosphorus, magnesium, immunoreactive thyrocalcitonin hormone, and parathyroid hormone concentrations were determined daily in 36 preterm and 29 small for gestational age, full term, healthy infants. Preterm babies with early neonatal hypocalcaemia had significantly higher concentrations of serum thyrocalcitonin hormone in the first four days of life than normocalcaemic preterm babies. Parathyroid hormone concentrations were similar in hypocalcaemic and normocalcaemic infants. In contrast, in the full term group no significant differences were detected in thyrocalcitonin hormone and parathyroid hormone patterns between hypocalcaemic and normocalcaemic subjects. This suggests two different pathogeneses for early hypocalcaemia in low birthweight infants. Hyperthyrocalcitoninaemia seems to be the main determining factor in preterm infants, while a non-hormonal pathogenesis should be considered in full term infants who are small for gestational age.

Calcitonin↗
PubMed1985

Vitamin D-binding protein in the perinatal period.

The molecular polymorphism and quantitative levels of serum vitamin D-binding protein (DBP) were ascertained in a group of preterm, full-term and hypocalcaemic full-term newborn infants. The serum concentration of DBP is not influenced by phenotype and increases with fetal age from the 32nd-33rd week of gestation until the 35th week of gestation. Neither different DBP allele distribution nor abnormal quantitative levels found among 29 hypocalcaemic full-term newborn infants.

Alleles↗
PubMed1982

Serial blood T4 and TSH determinations in low birth weight infants. Influence of gestational age, birth weight and neonatal pathology on thyroid function.

Serial blood T4 and TSH determinations were performed on a total number of 352 low birth weight (LBW) infants: 210 healthy newborns and 142 infants affected by respiratory distress syndrome (RDS), sepsis, hyperbilirubinaemia, hypocalcemia, or hypoglycemia. The healthy infants have been divided into three groups in relation to gestational age (less than or equal to 33 wk, 34-36 wk, greater than or equal to 37 wk). Statistical evaluation among groups shows that reduced T4 concentration in LBW infants is strictly related to gestational age, while TSH failed to demonstrate any significant correlation. No significant influence of birth weight on T4 and TSH has been observed. The preterm newborns affected by RDS or sepsis showed a significant reduction of mean T4 concentrations up to 20th day of life when compared with healthy controls similar for gestational age and birth weight. TSH levels are not significantly different. No significant modifications of T4 and TSH have been found related to the other pathological conditions. The significant reduction of T4 and the high incidence of subjects with low T4 values observed in healthy and sick preterm population lend further support to the use of TSH determination for optimum screening of congenital hypothyroidism.

Birth Weight↗