Related Experiment Videos
Blood cell polyamines in children with short stature in reference to growth hormone activity
Insights
The spermidine to spermine ratio in children with short stature may indicate endocrine issues. Low ratios correlated with growth hormone deficiency, suggesting its potential as a diagnostic marker.
Area of Science:
- Biochemistry
- Pediatric Endocrinology
Background:
- Polyamines, such as spermidine and spermine, are crucial for cellular growth and differentiation.
- Altered polyamine metabolism has been implicated in various growth disorders.
Purpose of the Study:
- To investigate the diagnostic utility of the molar ratio of spermidine to spermine in children with short stature.
- To explore the correlation between this polyamine ratio and endocrine function, particularly growth hormone status.
Main Methods:
- Analysis of blood samples from 54 children with short stature to determine the spermidine/spermine molar ratio.
- Assessment of long-term reproducibility of the ratio.
- Correlation analysis with growth hormone response to insulin hypoglycemia and nitrogen retention during growth hormone therapy.
Main Results:
- The spermidine/spermine ratio exhibited good long-term reproducibility (9.0%).
- Children with short stature and endocrine disturbances, specifically isolated growth hormone deficiency or combined growth hormone and ACTH deficiency, showed significantly lower mean ratios (0.61 and 0.67, respectively) compared to those without endocrine issues (0.97).
- A significant positive correlation was observed between the polyamine ratio and growth hormone response (r=0.58) and nitrogen retention (r=0.45).
Conclusions:
- The spermidine to spermine molar ratio is a reproducible biomarker.
- A low spermidine/spermine ratio is associated with growth hormone deficiency in children with short stature.
- This polyamine ratio may serve as a valuable indicator in the diagnostic workup of pediatric short stature.
Abstract:
The molar ratio or two blood polyamines (spermidine to spermine) was investigated in 54 children with shortness of stature. The long-term reproducibility of this ratio was 9.0%. In children with no endocrine disturbances, the mean ratio was 0.97. In children with isolated growth hormone deficiency, it was 0.61, and in those with growth hormone and ACTH deficiency, it was 0.67, both significantly low values. The ratio showed a significant positive correlation with growth hormone response to insulin hypoglycemia (r = 0.58; P less than 0.001) and with the nitrogen retention response to short-term growth hormone therapy (r = 0.45; P less than 0.001). In contrast, no such correlation was present with cortisol response to hypoglycemia.