Cited by 179Regulation of Appetite and ObesityPharmacology and Obesity TreatmentAdipose Tissue and Metabolism

RM-493, a melanocortin-4 receptor (MC4R) agonist, increases resting energy expenditure in obese individuals

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Chen, Kong Y., Muniyappa, Ranganath, Abel, Brent S., Mullins, Katherine P., Staker, Pamela, Brychta, Robert J., Zhao, Xiongce, Ring, Michael +7 more·2015·The Journal of Clinical Endocrinology & Metabolism

Abstract

CONTEXT: Activation of the melanocortin-4 receptor (MC4R) with the synthetic agonist RM-493 decreases body weight and increases energy expenditure (EE) in nonhuman primates. The effects of MC4R agonists on EE in humans have not been examined to date. OBJECTIVE, DESIGN, AND SETTING: In a randomized, double-blind, placebo-controlled, crossover study, we examined the effects of the MC4R agonist RM-493 on resting energy expenditure (REE) in obese subjects in an inpatient setting. STUDY PARTICIPANTS AND METHODS: Twelve healthy adults (6 men and 6 women) with body mass index of 35.7 ± 2.9 kg/m(2) (mean ± SD) received RM-493 (1 mg/24 h) or placebo by continuous subcutaneous infusion over 72 hours, followed immediately by crossover to the alternate treatment. All subjects received a weight-maintenance diet (50% carbohydrate, 30% fat, and 20% protein) and performed 30 minutes of standardized exercise daily. Continuous EE was measured on the third treatment day in a room calorimeter, and REE in the fasting state was defined as the mean of 2 30-minute resting periods. RESULTS: RM-493 increased REE vs placebo by 6.4% (95% confidence interval, 0.68-13.02%), on average by 111 kcal/24 h (95% confidence interval, 15-207 kcal, P = .03). Total daily EE trended higher, whereas the thermic effect of a test meal and exercise EE did not differ significantly. The 23-hour nonexercise respiratory quotient was lower during RM-493 treatment (0.833 ± 0.021 vs 0.848 ± 0.022, P = .02). No adverse effect on heart rate or blood pressure was observed. CONCLUSIONS: Short-term administration of the MC4R agonist RM-493 increases REE and shifts substrate oxidation to fat in obese individuals.

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  • Setmelanotide administration for 3 days to 12 obese adults did not raise blood pressure.

    “In another study [80], setmelanotide administration for 3 days to 12 in obese adults caused significant increases in resting energy expenditure and preferential increases in fat oxidation without raising BP.”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [80]

  • Setmelanotide administration for 3 days to 12 obese adults caused significant increases in resting energy expenditure.

    “In another study [80], setmelanotide administration for 3 days to 12 in obese adults caused significant increases in resting energy expenditure and preferential increases in fat oxidation without raising BP.”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [80]

  • Setmelanotide administration for 3 days to 12 obese adults caused preferential increases in fat oxidation.

    “In another study [80], setmelanotide administration for 3 days to 12 in obese adults caused significant increases in resting energy expenditure and preferential increases in fat oxidation without raising BP.”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [80]

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Authors
Chen, K. Y., Muniyappa, R., Abel, B. S., Mullins, K. P., Staker, P., Brychta, R. J., Zhao, X., Ring, M., Psota, T. L., Cone, R. D., Panaro, B. L., Gottesdiener, K. M., Van der Ploeg, L. H. T., Reitman, M. L., & Skarulis, M. C.
Affiliations
  • National Institutes of Health (US)
  • Vanderbilt University (US)
  • Rhythm (United states) (US)
  • Rhythm Pharmaceuticals (K.M.G., L.H.T.V.d.P.), Boston, Massachusetts 02116
Corresponding author
Skarulis, Monica C.
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
2015-04-01
Volume
100
Issue
4
Pages
1639-1645
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W2079643489
Cited by
174
References
30
Citations by year
2026: 4 · 2025: 13 · 2024: 11 · 2023: 8 · 2022: 13 · 2021: 21 · 2020: 22 · 2019: 21 · 2018: 21 · 2017: 16 · 2016: 18 · 2015: 6
FWCI
11.27
Type
journal article
Language
en
Open access
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (MD 20892)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK070332, P30DK058404)
  • NIH Clinical Center
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Pharmacology › Pharmacology and Obesity Treatment
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
melanocortin-4 receptor agonist, resting energy expenditure, obesity, energy expenditure, substrate oxidation, respiratory quotient, weight loss, continuous subcutaneous infusion, thermogenesis
MeSH terms
Adult, alpha-MSH, Combined Modality Therapy, Double-Blind Method, Energy Metabolism, Female, Humans, Male, Middle Aged, Obesity, Rest, Cross-Over Studies, Anti-Obesity Agents, Receptor, Melanocortin, Type 4, Young Adult, Weight Reduction Programs

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