Cited by 186Pharmacology and Obesity TreatmentAdipose Tissue and MetabolismRegulation of Appetite and Obesity

Effect of a 28-d treatment with L-796568, a novel β3-adrenergic receptor agonist, on energy expenditure and body composition in obese men

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Larsen, Thomas M, Toubro, Søren, van Baak, Marleen A, Gottesdiener, Keith M, Larson, Patrick, Saris, Wim HM, Astrup, Arne·2002·The American Journal of Clinical Nutrition

Abstract

Background Stimulation of energy expenditure (EE) with selective thermogenic beta-adrenergic agonists may be a promising approach for treating obesity.Objective We analyzed the effects of the highly selective human beta(3)-adrenergic agonist L-796568 on 24-h EE, substrate oxidation, and body composition in obese, weight-stable men.Design In this 2-center, double-blind, randomized, parallel-group study, we measured 24-h EE before and after 28 d of treatment with L-796568 (375 mg/d) or placebo during weight maintenance (ie, without dietary intervention) in nondiabetic, nonsmoking men aged 25-49 y with body mass index (in kg/m(2)) of 28-35 (n = 10 subjects per treatment group).Results The mean change in 24-h EE from before to after treatment did not differ significantly between groups (92 +/- 586 and 86 +/- 512 kJ/24 h for the L-796568 and placebo groups, respectively). The change in 24-h nonprotein respiratory quotient from before to after treatment did not differ significantly between groups (0.009 +/- 0.021 and 0.009 +/- 0.029, respectively). No changes in glucose tolerance were observed, but triacylglycerol concentrations decreased significantly with L-796568 treatment compared with placebo (-0.76 +/- 0.76 and 0.42 +/- 0.31 mmol/L, respectively; P < 0.002). Overall, treatment-related changes in body composition were not observed, but higher plasma L-796568 concentrations in the L-796568 group were associated with greater decreases in fat mass (r = -0.69, P < 0.03).Conclusions Treatment with L-796568 for 28 d had no major lipolytic or thermogenic effect but it lowered triacylglycerol concentrations. This lack of chronic effect on energy balance is likely explained by insufficient recruitment of beta(3)-responsive tissues in humans, down-regulation of the beta(3)-adrenergic receptor-mediated effects with chronic dosing, or both.

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Crossref · 10.1093/ajcn/76.4.780

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  • Attempts to find functional BAT or utilize its thermogenesis for weight loss in humans have been largely unsuccessful.

    “Histological evidence has indicated that brown fat is present, albeit in small amounts, in adults, throughout life 76, but attempts to find functional BAT 77 or utilize its thermogenesis for weight loss 78,79 have been largely unsuccessful.”

    From Cellular bioenergetics as a target for obesity therapy (2010) · cites this paper as [79]

  • The effect of L-796568 seemed to be lost after 28 days of treatment.

    “One β3 agonist, L-796568, increased lipolysis and energy expenditure in overweight men acutely 142, but its effect seemed to be lost after 28 days of treatment 79,141.”

    From Cellular bioenergetics as a target for obesity therapy (2010) · cites this paper as [79]

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Research works printed but not linked: 4

  1. Blaak EE, van Baak MA, Kempen KPG, Saris WHM. Role of ␣-and ␤-adrenoceptors in sympathetically mediated thermogenesis. Am J Physiol 1993;264:E11-7.
  2. Yoshida T, Umekawa T, Sakane Nkogure A, Kondo M. Long-term exposure of a ␤ 3 -adrenoceptor agonist induces up-regulation of ␤ 3 -, but not ␤ 1 -adrenoceptor in adipose tissue in OLEFT rats with obesity and diabetes. Int J Obes Relat Metab Disord 1998;22:S187 (abstr).
  3. Schiffelers SLH, Saris WHM, van Baak MA. The effect of an increased NEFA concentration on thermogenesis and substrate oxi- dation in obese and lean men. Int J Obes Relat Metab Disord 2001; 25:33-8.
  4. Mitchell TH, Ellis RMD, Smith SA, Robb G, Cawthorne MA. Effects of BRL 35135, a ␤-adrenoceptor agonist with novel selectivity in obese subjects. Int J Obes 1989;13:757-66.

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Authors
Larsen, T. M., Toubro, S., van Baak, M. A., Gottesdiener, K. M., Larson, P., Saris, W. H., & Astrup, A.
Affiliations
  • Merck & Co., Inc., Rahway, NJ, USA (United States) (US)
  • University of Copenhagen (DK)
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2002-10
Volume
76
Issue
4
Pages
780-788
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2139904173
Cited by
179
References
46
Citations by year
2026: 1 · 2025: 2 · 2024: 6 · 2023: 7 · 2022: 13 · 2021: 11 · 2020: 7 · 2019: 7 · 2018: 9 · 2017: 5 · 2016: 14 · 2015: 15 · 2014: 9 · 2013: 6 · 2012: 6
FWCI
2.24
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • Research Publications (Maastricht University) (publishedVersion, other-oa)
  • Research Publications (Maastricht University) (submittedVersion, other-oa)
Topics
  • Health Sciences › Medicine › Pharmacology › Pharmacology and Obesity Treatment
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
beta3-adrenergic agonists, obesity, energy expenditure, body composition, fat mass, triglycerides, substrate oxidation, respiratory quotient, lipolysis, thermogenesis, receptor down-regulation, glucose tolerance, plasma drug concentration, weight maintenance, pharmacological weight loss, beta-adrenergic agonists
MeSH terms
Benzenesulfonamides, Adult, Blood Glucose, Body Composition, Calorimetry, Indirect, Cholesterol, Diet, Double-Blind Method, Energy Metabolism, Fasting, Fatty Acids, Glucose Tolerance Test, Humans, Insulin, Kinetics, Male, Middle Aged, Obesity, Placebos, Sulfonamides, Thiazoles, Triglycerides, Adrenergic beta-3 Receptor Agonists

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