Sympathetic vasomotor tone determines blood pressure response to long-term sibutramine treatment

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Item Type:	Article
Title:	Sympathetic vasomotor tone determines blood pressure response to long-term sibutramine treatment
Creators Name:	Heusser, K., Engeli, S., Tank, J., Diedrich, A., Wiesner, S., Janke, J., Luft, F.C. and Jordan, J.
Abstract:	Context: The serotonin and norepinephrine transporter inhibitor sibutramine is a widely used antiobesity drug. In acute studies, the peripheral sympathomimetic effect of sibutramine was counteracted by a central sympatholytic action. Objective: The objective was to test the hypothesis that blood pressure responses to long-term sibutramine therapy may be related to sympathetic nerve traffic before treatment in a prospective open-label study in an academic clinical research center. Patients: This study comprised 20 obese subjects (body mass index, 30-40 kg/m2; age, 30-57 yr) receiving 5 d of placebo treatment followed by open-label 15 mg/d sibutramine and hypocaloric diet over 12 wk. Main Outcome Measures: Body weight, blood pressure, heart rate, muscle sympathetic nerve activity (MSNA) (microneurography), plasma catecholamines, and adipose tissue gene expression were measured. Results: Open-label sibutramine treatment decreased body weight 4.1 kg (P<0.01) and MSNA 17 bursts per minute (P=0.001), and increased diastolic blood pressure 3 mm Hg (P<0.05) and heart rate 8 bpm (P<0.01). The change in blood pressure with sibutramine treatment was inversely correlated with initial MSNA (r2=0.34; P<0.01). Chronic sibutramine treatment increased adrenoreceptor gene expression and plasma catecholamines. Conclusions: The blood pressure response to sibutramine treatment is related to initial MSNA so that subjects with higher MSNA exhibit a smaller increase or even a decrease in blood pressure. The phenomenon might be explained by a sustained reduction in central sympathetic activity with sibutramine treatment.
Keywords:	Autonomic, Microneurography , Obesity, Norepinephrine transporter
Source:	Journal of Clinical Endocrinology and Metabolism
ISSN:	0021-972X
Publisher:	Endocrine Society
Volume:	92
Number:	4
Page Range:	1560-1563
Date:	April 2007
Official Publication:	https://doi.org/10.1210/jc.2006-2499
PubMed:	View item in PubMed

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