Cited by 345Fibroblast Growth Factor ResearchParathyroid Disorders and TreatmentsFluoride Effects and Removal

βKlotho Is Required for Fibroblast Growth Factor (FGF) 21 Signaling through FGF Receptor (FGFR) 1c and FGFR3c

Open access
Suzuki, Masashi, Uehara, Yuriko, Motomura-Matsuzaka, Kaori, Oki, Junko, Koyama, Yoshinori, Kimura, Miho, Asada, Masahiro, Komi-Kuramochi, Akiko +2 more·2008·Molecular Endocrinology

Abstract

Fibroblast growth factor (FGF) 21, a structural relative of FGF23 that regulates phosphate homeostasis, is a regulator of insulin-independent glucose transport in adipocytes and plays a role in the regulation of body weight. It also regulates ketogenesis and adaptive responses to starvation. We report that in a reconstituted receptor activation assay system using BaF3 cells, which do not endogenously express any type of FGF receptor (FGFR) or heparan sulfate proteoglycan, FGF21 alone does not activate FGFRs and that betaKlotho is required for FGF21 to activate two specific FGFR subtypes: FGFR1c and FGFR3c. Coexpression of betaKlotho and FGFR1c on BaF3 cells enabled FGF21, but not FGF23, to activate receptor signaling. Conversely, coexpression of FGFR1c and Klotho, a protein related to betaKlotho, enabled FGF23 but not FGF21 to activate receptor signaling, indicating that expression of betaKlotho/Klotho confers target cell specificity on FGF21/FGF23. In all of these cases, heparin enhanced the activation but was not essential. In 3T3-L1 adipocytes, up-regulation of glucose transporter (GLUT) expression by FGF21 was associated with expression of betaKlotho, which was absent in undifferentiated 3T3-L1 fibroblasts. It is thus suggested that betaKlotho expression is a crucial determinant of the FGF21 specificity of the target cells upon which it acts in an endocrine fashion.

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 · 10.1210/me.2007-0313

Cites

34 of 34 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?

  • FGF21 signals by binding and activating a receptor complex composed of KLB and FGFR1c.

    “FGF21 elicits its biological effects by binding and activating a receptor complex composed of the co-receptor KLB and a traditional FGF receptor, fibroblast growth factor receptor 1c (FGFR1c)46,47.”

    From Metabolic messengers: FGF21 (2021) · cites this paper as [47]

  • FGF21 signals to a receptor complex comprised of FGFR1c and KLB.

    “FGF21 signals to a receptor complex comprised of FGF receptor 1c (FGFR1c) and its co-receptor β-klotho (KLB) [[143], [144], [145], [146]].”
  • FGF21 functions in target tissues that express FGFR1c and the obligate coreceptor β-klotho.

    “FGF21 functions in target tissues that express the traditional FGF receptor FGFR1c and the obligate coreceptor β-klotho (2, 27, 71, 99, 124, 140).”

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

Cited by

Sorted by citations

Authors
Suzuki, M., Uehara, Y., Motomura-Matsuzaka, K., Oki, J., Koyama, Y., Kimura, M., Asada, M., Komi-Kuramochi, A., Oka, S., & Toru, T.
Affiliations
  • National Institute of Advanced Industrial Science and Technology (JP)
  • Tokyo University of Science (JP)
  • Signaling Molecules Research Laboratory (M.S., Y.U., K.M.-M., J.O., M.K., M.A., A.K.-K., S.O., T.I.), Ibaraki 305-8566, Japan
Venue
Molecular Endocrinology
Published
2008-04-01
Volume
22
Issue
4
Pages
1006-1014
ISSN
  • 0888-8809 (ISSN-L)
  • 1944-9917
OpenAlex
W2110534048
Cited by
345
References
34
Citations by year
2026: 17 · 2025: 16 · 2024: 18 · 2023: 11 · 2022: 18 · 2021: 18 · 2020: 19 · 2019: 19 · 2018: 13 · 2017: 25 · 2016: 26 · 2015: 25 · 2014: 16 · 2013: 20 · 2012: 27
FWCI
7.82
Type
journal article
Language
en
Open access
Locations
  • Molecular Endocrinology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fibroblast Growth Factor Research
  • Health Sciences › Medicine › Nephrology › Parathyroid Disorders and Treatments
  • Physical Sciences › Environmental Science › Water Science and Technology › Fluoride Effects and Removal
Keywords
β-Klotho, FGF21, fibroblast growth factor 23, FGFR1c, FGF receptor signaling, target cell specificity, heparan sulfate proteoglycans, adipocytes, insulin-independent glucose transport, Ba/F3 cells, 3T3-L1 adipocytes, phosphate homeostasis, ketogenesis, starvation adaptation
MeSH terms
Fibroblast Growth Factor-23, Klotho Proteins, Animals, Fibroblast Growth Factors, Glucuronidase, Protein Binding, RNA, Messenger, Immunoblotting, Signal Transduction, Gene Expression, Reverse Transcriptase Polymerase Chain Reaction, 3T3-L1 Cells, Glucose Transport Proteins, Facilitative, Mice, Receptor, Fibroblast Growth Factor, Type 1, Receptor, Fibroblast Growth Factor, Type 3

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