Cited by 73Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesPancreatic function and diabetes

Long-term effects of central leptin and resistin on body weight, insulin resistance, and β-cell function and mass by the modulation of hypothalamic leptin and insulin signaling.

Park, Sunmin, Hong, Sang Mee, Sung, So Ra, Jung, Hye Kyung·2008·Endocrinology

Abstract

To determine the long-term effect of central leptin and resistin on energy homeostasis, peripheral insulin resistance, and beta-cell function and mass, intracerebroventricular (ICV) infusion of leptin (3 ng/h), resistin (80 ng/h), leptin plus resistin, and cerebrospinal fluid (control) was conducted by means of an osmotic pump for 4 wk on normal rats and 90% pancreatectomized diabetic rats fed 40% fat-energy diets. Overall, the effects were greater in diabetic rats than normal rats. Leptin infusion, causing a significant reduction in food intake, decreased body weight and epididymal fat. However, resistin and leptin plus resistin reduced epididymal fat with decreased serum leptin levels in comparison with the control. Unlike serum leptin, only resistin infusion lowered serum resistin levels. Central leptin increased glucose infusion rates during euglycemic hyperinsulinemic clamp and suppressed hepatic glucose production in the hyperinsulinemic state in comparison with the control. However, central leptin did not affect glucose-stimulated insulin secretion and beta-cell mass. Central resistin infusion also increased peripheral insulin sensitivity, but not as much as leptin. Unlike leptin, resistin significantly increased first-phase insulin secretion during hyperglycemic clamp and beta-cell mass by augmenting beta-cell proliferation. These metabolic changes were associated with hypothalamic leptin and insulin signaling. ICV infusion of leptin potentiated signal transducer and activator of transcription 3 phosphorylation and attenuated AMP kinase in the hypothalamus, but resistin had less potent effects than leptin. Leptin enhanced insulin signaling by potentiating IRS2-->Akt pathways, whereas resistin activated Akt without augmenting insulin receptor substrate 2 phosphorylation. In conclusion, long-term ICV infusion of leptin and resistin independently improved energy and glucose homeostasis by modulating in different ways hypothalamic leptin and insulin signaling.

Integrity signals

Registry

Crossref · 10.1210/en.2007-0754

Cites

40 of 40 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Park, S., Hong, S. M., Sung, S. R., & Jung, H. K.
Affiliations
Hoseo University (KR)
Corresponding author
Park, Sunmin
Venue
Endocrinology
Published
2007-11-08
Volume
149
Issue
2
Pages
445-454
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2024813257
Cited by
73
References
40
Citations by year
2024: 3 · 2023: 2 · 2021: 3 · 2020: 2 · 2019: 4 · 2018: 2 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 5 · 2013: 4 · 2012: 7
FWCI
2.72
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
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 › Surgery › Pancreatic function and diabetes
Keywords
leptin, resistin, insulin resistance, beta-cell function, beta-cell mass, energy homeostasis, glucose homeostasis, dietary intake, epididymal adipose tissue, hepatic glucose production, first-phase insulin secretion, beta-cell proliferation, AMP kinase, STAT3, intracerebroventricular infusion, diabetic rats, pancreatic resection
MeSH terms
Insulin Secretion, Animals, Blood Glucose, Body Weight, Cell Division, Eating, Glucose Tolerance Test, Hyperinsulinism, Hypothalamus, Injections, Intraventricular, Insulin, Insulin Resistance, Insulin-Like Growth Factor I, Male, Pancreatectomy, Glucose Clamp Technique, Signal Transduction, Rats, Sprague-Dawley, Apoptosis, Leptin, Insulin-Secreting Cells, Rats, Resistin

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review