Cited by 254Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesBlood Pressure and Hypertension Studies

Contrasting blood pressure effects of obesity in leptin-deficient ob/ob mice and agouti yellow obese mice

Mark, Allyn L., Shaffer, Richard A., Correia, Marcelo L.G., Morgan, Donald A., Sigmund, Curt D., Haynes, William G.·1999·Journal of Hypertension

Abstract

OBJECTIVE: Recent advances in understanding the neuroendocrine pathways regulating appetite, metabolism and body weight afford an opportunity to explore further the mechanisms by which obesity influences arterial pressure. ob/ob(Lep(ob)/Lep(ob)) mice have a mutation in the ob gene and are leptin-deficient. Leptin possesses pressor actions and has been shown to increase arterial pressure when infused chronically or over-expressed transgenically. In contrast, agouti yellow obese(Ay) mice have overexpression of an agouti peptide that blocks melanocortin receptors. Stimulation of melanocortin receptors by alpha-melanocyte-stimulating hormone decreases arterial pressure. DESIGN AND METHODS: This study measured arterial pressure in leptin-deficient ob/ob mice, agouti yellow obese mice and their lean controls to test the hypothesis that the effects of obesity on arterial pressure are importantly influenced by the genetic and neuroendocrine mechanisms causing the obesity. We measured arterial pressure directly in conscious ob/ob mice (n = 14), agouti yellow obese mice (n = 6) and the same number of lean littermates. RESULTS: Body weight was nearly twice as high in ob/ob mice as in their lean controls, but mean arterial pressure was significantly lower in ob/ob mice (92+/-3 mmHg) compared with their lean controls (106+/-2 mmHg; P = 0.00017). In contrast, mean arterial pressure was significantly higher in agouti yellow obese mice (124+/-3 mmHg) than in their lean controls (99+/-1 mmHg; P = 0.000002) despite the fact that the agouti mice had milder obesity. CONCLUSIONS: This study prompts three conclusions: (1) leptin-deficient ob/ob mice and agouti yellow obese mice have contrasting blood pressure responses to obesity, (2) obesity does not invariably increase arterial pressure in mice, and (3) the arterial pressure response to obesity may depend critically on the underlying genetic and neuroendocrine mechanisms.

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Crossref · 10.1097/00004872-199917121-00026

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23 of 23 references verified0 citation errors · 0 not checkable

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  • Leptin-deficient (ob/ob) mice exhibit severe obesity, dyslipidaemia, insulin resistance, and hyperinsulinaemia but reduced blood pressure and sympathetic nerve activity compared with lean control mice.

    “In addition, leptin-deficient (ob/ob) mice exhibit severe obesity, dyslipidaemia, insulin resistance and hyperinsulinaemia but reduced BP and SNA compared with lean control mice130.”
  • Mice with leptin deficiency (ob/ob) have severe obesity, insulin resistance, hyperinsulinemia, and dyslipidemia but lower BP and reduced SNS activity compared to lean mice.

    “Mice with leptin deficiency (ob/ob) mice have severe obesity, insulin resistance, hyperinsulinemia, and dyslipidemia but lower BP and reduced SNS activity compared to lean mice112.”
  • Another caveat of the ob/ob model for the study of hypertrophy is the presence of low arterial pressure, while the opposite is found in most forms of obesity.

    “Another caveat of this model for the study of hypertrophy is the presence of low arterial pressure, while the opposite is found in most forms of obesity (224).”

    From Cardiac remodeling in obesity (2008) · cites this paper as [224]

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Authors
Mark, A. L., Shaffer, R. A., Correia, M. L. G., Morgan, D. A., Sigmund, C. D., & Haynes, W. G.
Affiliations
University of Iowa (US)
Corresponding author
Mark, Allyn L.
Venue
Journal of Hypertension
Published
1999-12
Volume
17
Issue
Supplement
Pages
1949-1953
ISSN
0263-6352 (ISSN-L)
OpenAlex
W1976029372
Cited by
254
References
23
Citations by year
2026: 3 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 3 · 2020: 8 · 2019: 9 · 2018: 5 · 2017: 12 · 2016: 13 · 2015: 10 · 2014: 14 · 2013: 12 · 2012: 8
FWCI
3.03
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Hypertension (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p50hl044546-05)
  • National Heart, Lung, and Blood Institute (HL-14388, HL-44546, P01HL014388)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
Keywords
obesity, blood pressure, leptin deficiency, ob/ob mice, melanocortin receptors, alpha-melanocyte-stimulating hormone, neuroendocrine regulation
MeSH terms
Animals, Blood Pressure, Body Weight, Male, Mice, Inbred C57BL, Mice, Mutant Strains, Obesity, Reference Values, Leptin, Mice

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