Cited by 51Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesNeuropeptides and Animal Physiology

Chronic antidiabetic and cardiovascular actions of leptin: role of CNS and increased adrenergic activity

da Silva, Alexandre A., Tallam, Lakshmi S., Liu, Jiankang, Hall, John E.·2006·American Journal of Physiology-Regulatory, Integrative and Comparative Physiology

Abstract

This study examined the importance of direct central nervous system (CNS) actions and increased adrenergic activity in mediating the chronic antidiabetic and cardiovascular actions of leptin. Insulin-deficient rats (streptozotocin, 50 mg/kg) were used to examine the effects of leptin on glucose homeostasis independent of changes in insulin. Male Sprague-Dawley rats were instrumented with arterial and venous catheters and intracerebroventricular cannula for 24-h/day blood pressure (BP) and heart rate (HR) monitoring and intravenous and intracerebroventricular infusions. Insulin-deficient diabetes was associated with marked hyperglycemia, hyperphagia, decreased BP, and pronounced fall in HR. Leptin treatment, intravenous or intracerebroventricular, completely restored to control values plasma glucose levels (384 ± 58 to 102 ± 28 and 307 ± 38 to 65 ± 7 mg/dl, respectively), food intake, BP, and HR (304 ± 8 to 364 ± 7 and 317 ± 13 to 423 ± 9 bpm, respectively). Combined blockade of α 1-, β 1-, and β 2-adrenergic receptors attenuated the rise in HR by 30 to 50% but had no effect on the antidiabetic and dietary actions of leptin. Blockade of β 3-adrenergic receptors did not attenuate the chronic cardiovascular or metabolic effects of leptin. These data demonstrate that leptin, via its direct actions in the CNS, has powerful antidiabetic actions in insulin-deficient rats independent of increased peripheral α 1, β 1, β 2, and β 3-adrenergic activity. Leptin also exerts important long-term cardiovascular actions that are partially mediated via α 1- and β 1/β 2-adrenergic activation. These findings provide new insights into novel pathways for long-term control of glucose homeostasis and cardiovascular regulation.

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Crossref · 10.1152/ajpregu.00187.2006

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Authors
da Silva, A. A., Tallam, L. S., Liu, J., & Hall, J. E.
Venue
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
Published
2006-11
Volume
291
Issue
5
Pages
R1275-R1282
ISSN
  • 0363-6119 (ISSN-L)
  • 1522-1490
OpenAlex
W2121512193
Cited by
51
References
36
Citations by year
2026: 3 · 2024: 1 · 2022: 1 · 2021: 3 · 2020: 4 · 2019: 1 · 2018: 2 · 2017: 3 · 2016: 2 · 2015: 5 · 2014: 5 · 2013: 3 · 2012: 2
FWCI
1.25
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Regulatory, Integrative and Comparative Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Heart, Lung, and Blood Institute (P01 HL-51972)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
leptin, insulin deficiency, streptozotocin-induced diabetes, glucose homeostasis, hyperglycemia, hyperphagia, blood pressure, heart rate, adrenergic receptors, alpha1-adrenoceptors, beta1-adrenergic receptor, beta2-adrenergic receptor, beta3-adrenergic receptor, central nervous system, intracerebroventricular infusion, cardiovascular regulation
MeSH terms
Animals, Blood Pressure, Cardiovascular Physiological Phenomena, Central Nervous System, Diabetes Mellitus, Experimental, Glucose, Heart Rate, Hemostasis, Insulin, Kidney, Male, Receptors, Adrenergic, Rats, Sprague-Dawley, Leptin, Rats

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