Cited by 127Regulation of Appetite and ObesityHypothalamic control of reproductive hormonesAdipokines, Inflammation, and Metabolic Diseases

Control of Blood Pressure, Appetite, and Glucose by Leptin in Mice Lacking Leptin Receptors in Proopiomelanocortin Neurons

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do Carmo, Jussara M., da Silva, Alexandre A., Cai, Zhengwei, Lin, Shuying, Dubinion, John H., Hall, John E.·2011·Hypertension

Abstract

Although the central nervous system melanocortin system is an important regulator of energy balance, the role of proopiomelanocortin (POMC) neurons in mediating the chronic effects of leptin on appetite, blood pressure, and glucose regulation is unknown. Using Cre/loxP technology we tested whether leptin receptor deletion in POMC neurons (LepR flox/flox /POMC-Cre mice) attenuates the chronic effects of leptin to increase mean arterial pressure (MAP), enhance glucose use and oxygen consumption, and reduce appetite. LepR flox/flox /POMC-Cre, wild-type, LepR flox/flox , and POMC-Cre mice were instrumented for MAP and heart rate measurement by telemetry and venous catheters for infusions. LepR flox/flox /POMC-Cre mice were heavier, hyperglycemic, hyperinsulinemic, and hyperleptinemic compared with wild-type, LepR flox/flox , and POMC-Cre mice. Despite exhibiting features of metabolic syndrome, LepR flox/flox /POMC-Cre mice had normal MAP and heart rate compared with LepR flox/flox but lower MAP and heart rate compared with wild-type mice. After a 5-day control period, leptin was infused (2 μg/kg per minute, IV) for 7 days. In control mice, leptin increased MAP by ≈5 mm Hg despite decreasing food intake by ≈35%. In contrast, leptin infusion in LepR flox/flox /POMC-Cre mice reduced MAP by ≈3 mm Hg and food intake by ≈28%. Leptin significantly decreased insulin and glucose levels in control mice but not in LepR flox/flox /POMC-Cre mice. Leptin increased oxygen consumption in LepR flox/flox /POMC-Cre and wild-type mice. Activation of POMC neurons is necessary for the chronic effects of leptin to raise MAP and reduce insulin and glucose levels, whereas leptin receptors in other areas of the brain other than POMC neurons appear to play a key role in mediating the chronic effects of leptin on appetite and oxygen consumption.

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Crossref · 10.1161/hypertensionaha.110.161349

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  • Selective leptin receptor deletion in POMC neurons of the arcuate nucleus and brainstem abolished blood pressure increases in mice during chronic leptin infusions.

    “Selective LepR deletion in POMC neurons of the ARC and brainstem also abolished BP increases in mice during chronic leptin infusions140.”
  • Deletion of LepR only in POMC neurons prevents increased BP during chronic hyperleptinemia.

    “In fact, deletion of LepR only in POMC neurons, a major type of neuron in the ARC, prevents increased BP during chronic hyperleptinemia97.”
  • Leptin receptor deletion specifically in POMC neurons did not markedly attenuate the effects of leptin on food intake.

    “Leptin receptor (LR) deletion specifically in POMC neurons completely abolished the chronic effects of leptin to raise BP and to reduce plasma glucose and insulin levels but did not markedly attenuate the effects of leptin on food intake [50].”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [50]

  • Leptin receptor activation in POMC neurons is critical for leptin's ability to increase blood pressure and improve glucose homeostasis but not for its effect to reduce food intake.

    “These findings suggest that LR activation in POMC neurons is critical for leptin’s ability to increase BP and improve glucose homeostasis but not for its effect to reduce food intake.”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [50]

  • Leptin requires activation of POMC neurons and MC4R to mediate its effects on renal sympathetic nervous system activity and blood pressure.

    “Leptin requires activation of POMC neurons and MC4R to mediate its effects on renal SNS activity and BP [28, 50, 51].”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [50]

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Authors
do Carmo, J. M., da Silva, A. A., Cai, Z., Lin, S., Dubinion, J. H., & Hall, J. E.
Affiliations
  • From the Departments of Physiology and Biophysics (J.M.d.C., A.A.d.S., J.H.D., J.E.H.) and Pediatrics (Z.C., S.L.), University of Mississippi Medical Center, Jackson, MS.
  • University of Mississippi Medical Center (US)
Venue
Hypertension
Published
2011-05
Volume
57
Issue
5
Pages
918-926
ISSN
  • 0194-911X (ISSN-L)
  • 1524-4563
OpenAlex
W1975214074
Cited by
127
References
34
Citations by year
2026: 2 · 2025: 2 · 2024: 6 · 2023: 1 · 2022: 2 · 2021: 9 · 2020: 13 · 2019: 6 · 2018: 10 · 2017: 18 · 2016: 11 · 2015: 8 · 2014: 12 · 2013: 15 · 2012: 10
FWCI
5.49
Type
journal article
Language
en
Open access
Locations
  • Hypertension (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Heart, Lung, and Blood Institute (P01HL051971)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
leptin, leptin receptor, proopiomelanocortin neurons, melanocortin system, blood pressure regulation, appetite, glucose regulation, insulin, oxygen consumption, energy balance, metabolic syndrome, hyperleptinemia, hyperglycemia, heart rate
MeSH terms
Analysis of Variance, Animals, Appetite, Blood Glucose, Blood Pressure, Body Weight, Eating, Enzyme-Linked Immunosorbent Assay, Fluorescent Antibody Technique, Immunohistochemistry, Insulin, Male, Motor Activity, Neurons, Oxygen Consumption, Pro-Opiomelanocortin, Telemetry, Mice, Knockout, Leptin, Mice, Receptors, Leptin

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