Cited by 34TGF-β signaling in diseasesProteoglycans and glycosaminoglycans researchChronic Kidney Disease and Diabetes

Nephrocan, a Novel Member of the Small Leucine-rich Repeat Protein Family, Is an Inhibitor of Transforming Growth Factor-β Signaling

Open access
Mochida, Yoshiyuki, Parisuthiman, Duenpim, Kaku, Masaru, Hanai, Jun-ichi, Sukhatme, Vikas P., Yamauchi, Mitsuo·2006·Journal of Biological Chemistry

Abstract

In a search of new, small leucine-rich repeat proteoglycan/protein (SLRP) family members, a novel gene, nephrocan (NPN), has been identified. The gene consists of three exons, and based on the deduced amino acid sequence, NPN has 17 leucine-rich repeat motifs and unique cysteine-rich clusters both in the N and C termini, indicating that this gene belongs to a new class of SLRP family. NPN mRNA was predominantly expressed in kidney in adult mice, and during mouse embryogenesis, the expression was markedly increased in 11-day-old embryos at a time when early kidney development takes place. In the adult mouse kidney, NPN protein was located in distal tubules and collecting ducts. When NPN was overexpressed in cell culture, the protein was detected in the cultured medium, and upon treatment with N-glycosidase F, the molecular mass was lowered by approximately 14 kDa, indicating that NPN is a secreted N-glycosylated protein. Furthermore, transforming growth factor-beta (TGF-beta)-responsive 3TP promoter luciferase activity was down-regulated, and TGF-beta-induced Smad3 phosphorylation was also inhibited by NPN, suggesting that NPN suppresses TGF-beta/Smad signaling. Taken together, NPN is a novel member of the SLRP family that may play important roles in kidney development and pathophysiology by functioning as an endogenous inhibitor of TGF-beta signaling.

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 · 10.1074/jbc.m604787200

Cites

49 of 49 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?

  • Nephrocan (Nepn) was identified by Mochida et al. as an inhibitor of Transforming Growth Factor-β signaling.

    “Interestingly, 5730521E12Rik is identical to nephrocan (Nepn), which was recently identified by Mochida et al. as an inhibitor of Transforming Growth Factor-β signaling [52].”
  • 5730521E12Rik is identical to nephrocan (Nepn).

    “Interestingly, 5730521E12Rik is identical to nephrocan (Nepn), which was recently identified by Mochida et al. as an inhibitor of Transforming Growth Factor-β signaling [52].”

    From A systematic screen for genes expressed in definitive endoderm by Serial Analysis of Gene Expression (SAGE) (2007) · cites this paper as [52]

    The Abstract identifies nephrocan (NPN) and describes it as an inhibitor of TGF-β signaling. However, neither that passage nor the passages retrieved by searching for “5730521E12Rik” and its RIKEN-clone variant links that identifier to nephrocan, so our copy cannot verify the claimed identity. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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: 1

  1. Scott, P. G., McEwan, P. A., Dodd, C. M., Bergmann, E. M., Bishop, P. N., and Bella, J. (2004) Proc. Natl. Acad. Sci. U. S. A. 101, 15633-15638

Cited by

Sorted by citations

Authors
Mochida, Y., Parisuthiman, D., Kaku, M., Hanai, J.-I., Sukhatme, V. P., & Yamauchi, M.
Affiliations
  • University of North Carolina at Chapel Hill (US)
  • Beth Israel Deaconess Medical Center (US)
Corresponding author
Yamauchi, Mitsuo
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2006-11
Volume
281
Issue
47
Pages
36044-36051
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2150843788
Cited by
34
References
49
Citations by year
2025: 2 · 2023: 1 · 2022: 3 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 2 · 2014: 2 · 2013: 2 · 2012: 1
FWCI
1.49
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
  • National Aeronautics and Space Administration (NAG21596)
  • National Institutes of Health
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR052824, R21AR052824)
  • National Institute of Dental and Craniofacial Research (DE10489, R01DE010489)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
  • Health Sciences › Medicine › Nephrology › Chronic Kidney Disease and Diabetes
Keywords
small leucine-rich proteoglycans, TGF-beta signaling, Smad3 phosphorylation, kidney development, distal tubule, collecting duct, N-glycosylation, secreted proteins, embryonic kidney, gene expression
MeSH terms
Amino Acid Sequence, Animals, Cell Line, Cloning, Molecular, Glycoproteins, Humans, Kidney, Leucine, Molecular Sequence Data, Phylogeny, Tissue Distribution, Signal Transduction, Transforming Growth Factor beta, Gene Expression Regulation, Developmental, Intercellular Signaling Peptides and Proteins, 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