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[The use of klofelin for studying somatotropin secretion in children]
Insights
Clonidine reliably stimulates somatotropin (STH) secretion in children, with no significant differences observed between healthy children and those with constitutional growth retardation (CRG). This safe and effective test aids in assessing STH secretion.
Area of Science:
- Pediatric Endocrinology
- Growth Hormone Physiology
Background:
- Assessing somatotropin (STH) secretion is crucial for diagnosing growth disorders in children.
- Constitutional retardation of growth (CRG) is a common condition requiring accurate diagnostic tools.
Purpose of the Study:
- To evaluate the efficacy and safety of clonidine as a stimulant for STH secretion in children.
- To compare STH secretion response to clonidine in healthy children versus those with CRG.
Main Methods:
- A clonidine stimulation test was administered to 47 children (21 healthy, 26 with CRG) at a dose of 0.15 mg/m2 body surface area.
- Blood samples were collected to measure STH levels at baseline and at intervals up to 90 minutes post-administration.
- Observed and recorded any adverse effects of clonidine.
Main Results:
- Clonidine significantly stimulated STH secretion, with peak levels observed 60-90 minutes after administration.
- Mean STH secretion peaks exceeded baseline levels more than 8-fold in both healthy and CRG groups.
- No statistically significant difference in STH secretory response was found between the two groups.
- Reported side-effects were minimal and transient.
Conclusions:
- Clonidine is a safe, sensitive, and user-friendly agent for stimulating STH secretion in pediatric populations.
- The study found no discernible difference in STH secretory capacity between children with normal growth and those with CRG when stimulated by clonidine.
Abstract:
A stimulation clonidine test was performed in children for a study of STH secretion. The drug was injected at a dose of 0.15 m per 1 m2 of body surface. A total of 47 children were investigated. Of them 21 were healthy, with normal growth and 26 with constitutional retardation of growth (CRG). Maximum values of STH secretion were observed 60-90 min. after clonidine administration. Mean values of a STH secretion peak exceeded the initial ones greater than 8-fold in both groups without significant differences between them. Side-effects were insignificant and of transient nature. Thus clonidine is a sensitive, easy to use and safe stimulator of STH secretion. We revealed no difference in STH secretion between children with normal growth and those with CRG.