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Decrease of urinary levels of adrenergic metabolites including conjugated MHPG after a short term course of
M Popa1, A M Stefănescu, L Dumitriu
1C. I. Parhon, Institute of Endocrinology, Bucharest, Romania.
Insights
Diethylpropion medication in obese children on a low-calorie diet significantly reduced urinary levels of noradrenaline, vanillylmandelic acid, metanephrines, and homovanillic acid. These findings offer new insights into the drug
Area of Science:
- Pediatric Endocrinology
- Pharmacology
- Nutritional Science
Background:
- Obesity in children is a significant health concern.
- Dietary interventions are a cornerstone of pediatric obesity management.
- Pharmacological adjuncts are sometimes considered for weight management.
Purpose of the Study:
- To investigate the effect of diethylpropion on urinary catecholamine metabolites in obese children.
- To compare the impact of diethylpropion plus diet versus diet alone on these metabolites.
Main Methods:
- A short-term (8-11 days) study involving 12 obese children receiving diethylpropion (50 mg/day) and a 1000-calorie diet.
- A control group of 10 obese children received the diet only.
- Urinary excretion of adrenaline, noradrenaline, vanillyl-mandelic acid, metanephrines, methoxy hydroxyphenyl glycol, and homovanillic acid was measured before and after the intervention.
Main Results:
- Diethylpropion administration led to significant reductions in urinary noradrenaline, vanillyl-mandelic acid, metanephrines, and homovanillic acid.
- A borderline significant decrease was observed in methoxy hydroxyphenyl glycol levels.
- No significant changes in these metabolites were noted in the diet-only control group.
Conclusions:
- Short-term diethylpropion treatment in obese children on a restricted diet alters urinary excretion of key noradrenergic metabolites.
- The observed changes in metabolite excretion are not fully explained by existing pharmacological knowledge of diethylpropion.
- Further research is warranted to elucidate the mechanisms underlying these metabolic alterations.
Abstract:
A short term course (8-11 days) of diethylpropion 50 mg a day was administered to 12 obese children of both sexes fed a mixed low calorie diet containing about 1000 calories/day. A group of 10 obese children received the same diet and no medication. The sex-distribution was similar in both groups as well as the degree of overweight (appreciated by the Quettelet index). The urinary excretion of some noradrenergic derivative (adrenaline-A, noradrenaline-NA, vanillyl-mandelic acid VMA, metanephrines NM and methoxy hydroxyphenyl glycol-MHPG) and of homovanillic acid (HVA) was measured in both groups before and after drug therapy or diet, respectively. After the diethylpropion course, the urinary mean value of MHPG decreased (2.17 +/- 0.30, mean +/- SE vs 1.47 +/- 0.21) but the significance was borderline. The mean level excretion of NA, VMA, MN and HVA were significantly lower following diethylpropion. No significant change was observed in the diet-only group of patients as regards the same determinations. These observations are not entirely explained by the previous pharmacologic knowledge on diethylpropion and other sympathomimetic amines.