Cited by 362Fibroblast Growth Factor ResearchDietary Effects on HealthDiet and metabolism studies

Fibroblast Growth Factor 21-Deficient Mice Demonstrate Impaired Adaptation to Ketosis

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Badman, Michael K., Koester, Anja, Flier, Jeffrey S., Kharitonenkov, Alexei, Maratos-Flier, Eleftheria·2009·Endocrinology

Abstract

Fibroblast growth factor 21 (FGF21) is a key metabolic regulator. Expressed primarily in liver and adipose tissue, FGF21 is induced via peroxisome proliferator-activated receptor (PPAR) pathways during states requiring increased fatty acid oxidation including fasting and consumption of a ketogenic diet. To test the hypothesis that FGF21 is a physiological regulator that plays a role in lipid oxidation, we generated mice with targeted disruption of the Fgf21 locus (FGF21 knockout). Mice lacking FGF21 had mild weight gain and slightly impaired glucose homeostasis, indicating a role in long-term energy homeostasis. Furthermore, FGF21KO mice tolerated a 24-h fast, indicating that FGF21 is not essential in the early stages of starvation. In contrast to wild-type animals in which feeding KD leads to dramatic weight loss, FGF21KO mice fed KD gained weight, developed hepatosteatosis, and showed marked impairments in ketogenesis and glucose control. This confirms the physiological importance of FGF21 in the adaptation to KD feeding. At a molecular level, these effects were accompanied by lower levels of expression of PGC1alpha and PGC1beta in FGF21KO mice, strongly implicating these key transcriptional regulators in the action of FGF21. Furthermore, within the liver, the maturation of the lipogenic transcription factor sterol regulatory element-binding protein-1c was increased in FGF21KO mice, implicating posttranscriptional events in the maladaptation of FGF21KO mice to KD. These data reinforce the role of FGF21 is a critical regulator of long-term energy balance and metabolism. Mice lacking FGF21 cannot respond appropriately to a ketogenic diet, resulting in an impaired ability to mobilize and utilize lipids.

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  • Fgf21 total knockout mice fed a ketogenic diet developed hepatosteatosis and exhibited impaired ketogenesis and glucose control.

    “Consistent with these data, Fgf21 total knockout mice fed a ketogenic diet developed hepatosteatosis and exhibited impaired ketogenesis and glucose control (6).”
  • FGF21 is markedly induced by ketogenic diets in rodents and has been proposed to be a key mediator of hepatic lipid metabolism during ketotic states.

    “FGF21 is markedly induced by ketogenic diets in rodents and has been proposed to be a key mediator of hepatic lipid metabolism during ketotic states (6, 7).”

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  1. [24]24. **Koester A, Broderick CL, Chen Y, Kharitonenkov A, Ford A** 2006 Metabolic evaluation of FGF-21 transgenic mice. Diabetologia 49(Suppl 1):352 [[Google Scholar](https://scholar.google.com/scholar_lookup?Koester%20A,%20Broderick%20CL,%20Chen%20Y,%20Kharitonenkov%20A,%20Ford%20A%202006%20Metabolic%20evaluation%20of%20FGF-21%20transgenic%20mice.%20Diabetologia%2049(Suppl%201):352)]

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Authors
Badman, M. K., Koester, A., Flier, J. S., Kharitonenkov, A., & Maratos-Flier, E.
Affiliations
  • Beth Israel Deaconess Medical Center (US)
  • BioTechnology Discovery Research (A.Ko., A.Kh.), Lilly Research Laboratories, Indianapolis, Indiana 46285
  • Eli Lilly (United States) (US)
  • Division of Endocrinology, Diabetes, and Metabolism (M.K.B., J.S.F., E.M.-F.), Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215;
Venue
Endocrinology
Published
2009-10-09
Volume
150
Issue
11
Pages
4931-4940
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2020958481
Cited by
362
References
27
Citations by year
2026: 8 · 2025: 12 · 2024: 19 · 2023: 15 · 2022: 13 · 2021: 24 · 2020: 24 · 2019: 25 · 2018: 22 · 2017: 26 · 2016: 27 · 2015: 30 · 2014: 20 · 2013: 25 · 2012: 36
FWCI
9.72
Type
journal article
Language
en
Open access
Locations
  • Endocrinology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Eli Lilly and Company
  • National Institutes of Health (5r01dk069983-05)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P01DK056116, P30DK046200, R01-DK-069983, R37DK028082)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fibroblast Growth Factor Research
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Health Sciences › Medicine › Physiology › Diet and metabolism studies
Keywords
FGF21, FGF21 knockout mice, ketogenic diet, ketogenesis, fasting tolerance, energy homeostasis, PGC-1α, PGC-1β, SREBP-1c, hepatic steatosis, lipid oxidation, glucose homeostasis, weight gain
MeSH terms
Animals, Disease Models, Animal, Energy Metabolism, Fatty Liver, Female, Fibroblast Growth Factors, Glucose, Humans, Ketosis, Male, Mice, Inbred C57BL, Mice, Knockout, Gene Silencing, Lipid Metabolism, Mice, Diet, Ketogenic

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