Cited by 1,033Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesHypothalamic control of reproductive hormones

Physiological response to long-term peripheral and central leptin infusion in lean and obese mice.

Open access
Halaas, Jeffrey L., Boozer, Carol, Blair-West, John, Fidahusein, Naseem, Denton, Derek A., Friedman, Jeffrey M.·1997·Proceedings of the National Academy of Sciences

Abstract

Recent data have identified leptin as an afferent signal in a negative-feedback loop regulating the mass of the adipose tissue. High leptin levels are observed in obese humans and rodents, suggesting that, in some cases, obesity is the result of leptin insensitivity. This hypothesis was tested by comparing the response to peripherally and centrally administered leptin among lean and three obese strains of mice: diet-induced obese AKR/J, New Zealand Obese (NZO), and Ay. Subcutaneous leptin infusion to lean mice resulted in a dose-dependent loss of body weight at physiologic plasma levels. Chronic infusions of leptin intracerebroventricularly (i.c.v.) at doses of 3 ng/hr or greater resulted in complete depletion of visible adipose tissue, which was maintained throughout 30 days of continuous i.c.v. infusion. Direct measurement of energy balance indicated that leptin treatment did not increase total energy expenditure but prevented the decrease that follows reduced food intake. Diet-induced obese mice lost weight in response to peripheral leptin but were less sensitive than lean mice. NZO mice were unresponsive to peripheral leptin but were responsive to i.c.v. leptin. Ay mice did not respond to subcutaneous leptin and were 1/100 as sensitive to i.c.v. leptin. The decreased response to leptin in diet-induced obese, NZO, and Ay mice suggests that obesity in these strains is the result of leptin resistance. In NZO mice, leptin resistance may be the result of decreased transport of leptin into the cerebrospinal fluid, whereas in Ay mice, leptin resistance probably results from defects downstream of the leptin receptor in the hypothalamus.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1073/pnas.94.16.8878

Cites

40 of 40 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

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?

  • Animals with diet-induced obesity produced by a cafeteria or highly palatable diet show a minimal response to leptin administration.

    “Animals with diet-induced obesity produced by a cafeteria or highly palatable diet, often a reliable predictor of responses in humans, showed a minimal response to leptin administration.”

    From Leptin at 14 y of age: an ongoing story (2009) · cites this paper as [23]

  • In rodents, leptin sensitivity varies among strains: leptin-deficient animals are extremely sensitive, and animals with leptin receptor mutations are most resistant.

    “Leptin's efficacy was first shown to be variable in rodents in which there was a spectrum of leptin sensitivity among different strains; animals in leptin-deficient states had extreme leptin sensitivity and animals with leptin receptor mutations were the most resistant (23).”

    From Leptin at 14 y of age: an ongoing story (2009) · cites this paper as [23]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 4

  1. [23]Bielschowsky M, Bielschowsky F. Proc Univ Otago Med Sch. 1953;31:29–31. [Google Scholar]
  2. [24]Bateson W. Proc Zool Soc London. 1903;2:71–99. [Google Scholar]
  3. [25]Danforth C. Proc Soc Exp Biol Med. 1926;24:69–71. [Google Scholar]
  4. [29]Grundy S M, Barnett J P. DM, Dis-Mon. 1990;36:645–696. [PubMed] [Google Scholar]

Cited by

Sorted by citations

Authors
Halaas, J. L., Boozer, C., Blair-West, J., Fidahusein, N., Denton, D. A., & Friedman, J. M.
Affiliations
St. Luke's-Roosevelt Hospital Center (US)
Venue
Proceedings of the National Academy of Sciences
Published
1997-08-05
Volume
94
Issue
16
Pages
8878-8883
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2032777955
Cited by
1,033
References
40
Citations by year
2026: 6 · 2025: 18 · 2024: 15 · 2023: 6 · 2022: 20 · 2021: 38 · 2020: 17 · 2019: 22 · 2018: 21 · 2017: 28 · 2016: 26 · 2015: 26 · 2014: 40 · 2013: 29 · 2012: 37
FWCI
19.21
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Amgen
  • National Institutes of Health (5r29dk049853-05)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-41096, DK49853, R01DK041096)
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 › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
leptin, leptin resistance, obesity, diet-induced obesity, energy balance, energy expenditure, dietary intake, adipose tissue, leptin receptor, hypothalamus, AKR/J mice
MeSH terms
Administration, Cutaneous, Animals, Body Weight, Diet, Dose-Response Relationship, Drug, Injections, Intraventricular, Mice, Inbred C57BL, Obesity, Proteins, Leptin, Mice

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