PUBLICATION

Knockdown of Kmt2d leads to growth impairment by activating the Akt/β-catenin signaling pathway

Authors
Shangguan, H., Huang, X., Lin, J., Chen, R.
ID
ZDB-PUB-240124-10
Date
2024
Source
G3 (Bethesda)   14(3): (Journal)
Registered Authors
Keywords
Akt/β-catenin, KMT2D, chondrocyte, growth
MeSH Terms
  • Zebrafish/genetics
  • Zebrafish/metabolism
  • Cell Proliferation/genetics
  • beta Catenin*/genetics
  • beta Catenin*/metabolism
  • Wnt Signaling Pathway/genetics
  • Signal Transduction
  • Animals
  • Proto-Oncogene Proteins c-akt*/genetics
  • Proto-Oncogene Proteins c-akt*/metabolism
  • Chondrocytes/metabolism
(all 11)
PubMed
38263533 Full text @ G3 (Bethesda)
Abstract
The KMT2D variant-caused Kabuki syndrome (KS) is characterized by short stature as a prominent clinical characteristic. The initiation and progression of body growth are fundamentally influenced by chondrocyte proliferation. Uncertainty persists regarding the possibility that KMT2D deficiency affects growth by impairing chondrocyte proliferation. In this study, we used the CRISPR/Cas13d technique to knockdown kmt2d in zebrafish embryos and lentivirus to create a stable Kmt2d gene knockdown cell line in chondrocytes (ATDC5 cells). We also used CCK8 and flow cytometric studies, respectively, to determine proliferation and cell cycle state. The relative concentrations of phosphorylated Akt (ser473), phosphorylated β-catenin (ser552), and cyclin D1 proteins in chondrocytes and zebrafish embryos were determined by using western blots. In addition, Akt inhibition was used to rescue the phenotypes caused by kmt2d deficiency in chondrocytes, as well as a zebrafish model that was generated. The results showed that a knockdown of kmt2d significantly decreased body length and resulted in aberrant cartilage development in zebrafish embryos. Furthermore, the knockdown of Kmt2d in ATDC5 cells markedly increased proliferation and accelerated the G1/S transition. In addition, the knockdown of Kmt2d resulted in the activation of the Akt/β-catenin signaling pathway in ATDC5 cells. Finally, Akt inhibition could partly rescue body length and chondrocyte development in the zebrafish model. Our study demonstrated that KMT2D modulates bone growth conceivably via regulation of the Akt/β-catenin pathway.
Genes / Markers
Figures
Figure Gallery (5 images)
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Expression
Phenotype
Mutations / Transgenics
No data available
Human Disease / Model
Human Disease Fish Conditions Evidence
Kabuki syndromeTAS
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Sequence Targeting Reagents
Target Reagent Reagent Type
kmt2dCRISPR14-kmt2dCRISPR
kmt2dCRISPR15-kmt2dCRISPR
kmt2dCRISPR16-kmt2dCRISPR
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Fish
Antibodies
Name Type Antigen Genes Isotypes Host Organism
Ab5-aktmonoclonal
    Rabbit
    Ab24-ctnnbmonoclonal
      IgGRabbit
      Ab65-h3polyclonal
        IgGRabbit
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        Orthology
        No data available
        Engineered Foreign Genes
        No data available
        Mapping
        No data available