Cited by 58Fibroblast Growth Factor ResearchAdipose Tissue and MetabolismPeroxisome Proliferator-Activated Receptors

FGF21 mimetic antibody stimulates UCP1-independent brown fat thermogenesis via FGFR1/βKlotho complex in non-adipocytes

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Chen, Mark Z., Chang, Joshua C., Zavala-Solorio, Jose, Kates, Lance, Thai, Minh, Ogasawara, Annie, Bai, Xiaobo, Flanagan, Sean +7 more·2017·Molecular Metabolism

Abstract

OBJECTIVE: Fibroblast Growth Factor 21 (FGF21) is a potent stimulator of brown fat thermogenesis that improves insulin sensitivity, ameliorates hepatosteatosis, and induces weight loss by engaging the receptor complex comprised of Fibroblast Growth Factor Receptor 1 (FGFR1) and the requisite coreceptor βKlotho. Previously, recombinant antibody proteins that activate the FGFR1/βKlotho complex were proposed to act as an FGF21-mimetic; however, in vivo action of these engineered proteins has not been well studied. METHODS: We investigated the mechanism by which anti-FGFR1/βKlotho bispecific antibody (bFKB1) stimulates thermogenesis in UCP1-expressing brown adipocytes using genetically engineered mice. Anti-FGFR1 agonist antibody was also used to achieve brown adipose tissue restricted activation in transgenic mice. RESULTS: Studies with global Ucp1-deficient mice and adipose-specific Fgfr1 deficient mice demonstrated that bFKB1 acts on targets distal to adipocytes and indirectly stimulates brown adipose thermogenesis in a UCP1-independent manner. Using a newly developed transgenic system, we also show that brown adipose tissue restricted activation of a transgenic FGFR1 expressed under the control of Ucp1 promoter does not stimulate energy expenditure. Finally, consistent with its action as a FGF21 mimetic, bFBK1 suppresses intake of saccharin-containing food and alcohol containing water in mice. CONCLUSIONS: Collectively, we propose that FGFR1/βKlotho targeted therapy indeed mimics the action of FGF21 in vivo and stimulates UCP1-independent brown fat thermogenesis through receptors outside of adipocytes and likely in the nervous system.

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Crossref · 10.1016/j.molmet.2017.09.003

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  • Effects of extended FGF21 signalling in promoting weight loss through increased energy expenditure are mediated through direct actions on the CNS, not adipose tissues.

    “These effects of extended FGF21 signalling in promoting weight loss through increased energy expenditure are mediated through direct actions on the central nervous system67,80–84, not adipose tissues65,67,85”

    From Metabolic messengers: FGF21 (2021) · cites this paper as [85]

  • UCP1 is dispensable for FGF21-mediated increases in energy expenditure.

    “However, while adipose tissues are critical for these metabolic effects, UCP1 is dispensable for FGF21-mediated increases in energy expenditure (17, 85, 111, 132).”
  • Neither the inducible expression of a constitutively active FGFR1 protein specifically in adipose tissue nor antibody-mediated activation of a chimeric human FGFR1 receptor in brown adipocytes is sufficient to increase energy expenditure or affect body weight in vivo.

    “Neither the inducible expression of a constitutively active FGFR1 protein specifically in adipose tissue (11) nor antibody-mediated activation of a chimeric human FGFR1 receptor in brown adipocytes (17) is sufficient to increase energy expenditure or affect body weight in vivo.”
  • Activation of FGFR1-dependent signaling specifically in adipose tissues is not sufficient to induce the beneficial metabolic effects of FGF21 in vivo.

    “In addition to the loss-of-function studies, independent groups also found that the activation of FGFR1-dependent signaling specifically in adipose tissues is not sufficient to induce the beneficial metabolic effects of FGF21 in vivo (11, 17).”
  • Adipose-specific Fgfr1 knockout mice (Fgfr1fl/fl;Adiponectin-Cre) respond to chronic FGF21 administration similarly to control mice.

    “Consistent with these results, adipose-specific Fgfr1 knockout mice (Fgfr1fl/fl;Adiponectin-Cre) were also recently shown to respond to chronic FGF21 administration similarly to control mice (17) in contrast to the results obtained with Fgfr1fl/fl;ap2-Cre mice (4).”

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Authors
Chen, M. Z., Chang, J. C., Zavala-Solorio, J., Kates, L., Thai, M., Ogasawara, A., Bai, X., Flanagan, S., Nunez, V., Phamluong, K., Ziai, J., Newman, R., Warming, S., Kolumam, G., & Sonoda, J.
Affiliations
Genentech (US)
Corresponding author
Sonoda, Junichiro
Venue
Molecular Metabolism
Publisher
Elsevier BV
Published
2017-11
Volume
6
Issue
11
Pages
1454-1467
ISSN
2212-8778 (ISSN-L)
OpenAlex
W2755264179
Cited by
58
References
70
Citations by year
2026: 6 · 2025: 7 · 2024: 6 · 2023: 4 · 2022: 8 · 2021: 7 · 2020: 9 · 2019: 6 · 2018: 5
FWCI
2.23
Type
journal article
Language
en
Open access
Locations
  • Molecular Metabolism (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Genentech
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fibroblast Growth Factor Research
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
FGF21, FGFR1, β-Klotho, brown adipose tissue thermogenesis, energy expenditure, alcohol consumption, saccharin intake, nervous system
MeSH terms
Uncoupling Protein 1, Klotho Proteins, Animals, Antibodies, Adipose Tissue, Brown, Energy Metabolism, Fibroblast Growth Factors, Membrane Proteins, Mice, Transgenic, Obesity, Weight Loss, Mice, Knockout, Thermogenesis, Mitochondrial Proteins, Mice, Receptor, Fibroblast Growth Factor, Type 1, Adipose Tissue, White, Adipocytes, Brown

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