Urinary total hydroxyproline excretion in patients with Turner's syndrome and Klinefelter's syndrome.

Urinary total hydroxyproline excretion in patients with Turner's syndrome and Klinefelter's syndrome was studied. Among the patients with Turner's syndrome hydroxyproline excretion was relatively low in girls 11-14 years old and somewhat increased in 14-17 age groups. Above 17 years of age urinary total hydroxyproline excretion was significantly higher than in the control. In patients with Klinefelter's syndrome at the age below 11 and above 17 years normal hydroxyproline values were observed. In 3 sixteen-year-old boys with 47, XXY karyotype, excretion of hydroxyproline with urine was significantly lower than in the control. Relatively low values of total hydroxyproline in urine of 11-14 year-old girls with Turner's syndrome and decreased in boys with Klinefelter's syndrome result, most probably, from the absence of hormonal changes typical for the puberty. However, concentration of hydroxyproline in urine does not correlate with serum FSH and LH levels. It is not affected by the enhancement of changes in the bone system either. The presented data encourage further studies on the connective tissue biochemistry in the patients with numerical aberrations sex chromosomes.