Mechanical loading activates the YAP/TAZ pathway and chemokine expression in the MLO-Y4 osteocyte-like cell line.
Journal
Laboratory investigation; a journal of technical methods and pathology
ISSN: 1530-0307
Titre abrégé: Lab Invest
Pays: United States
ID NLM: 0376617
Informations de publication
Date de publication:
12 2021
12 2021
Historique:
received:
27
02
2021
accepted:
19
08
2021
revised:
17
08
2021
pubmed:
16
9
2021
medline:
30
12
2021
entrez:
15
9
2021
Statut:
ppublish
Résumé
Osteocytes are mechanosensitive cells that control bone remodeling in response to mechanical loading. To date, specific signaling pathways modulated by mechanical loading in osteocytes are not well understood. Yes associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ), the main effectors of the Hippo pathway, are reported to play a role in mechanotransduction and during osteoblastogenesis. Here, we hypothesized that YAP/TAZ signaling mediates osteocyte mechanosensing to target genes of the bone remodeling process. We aimed to investigate the contribution of YAP/TAZ in modulating the gene expression in an osteocyte-like cell line MLO-Y4. We developed a 3D osteocyte compression culture model from an MLO-Y4 osteocyte cell line embedded in concentrated collagen hydrogel. 3D-mechanical loading led to the increased expression of mechanosensitive genes and a subset of chemokines, including M-csf, Cxcl1, Cxcl2, Cxcl3, Cxcl9, and Cxcl10. The transcription regulators YAP and TAZ translocated to the nucleus and upregulated their target genes and proteins. RNAseq analysis revealed that YAP/TAZ knockdown mediated the regulation of several genes including osteocyte dendrite formation. Use of YAP/TAZ knockdown partially blunted the increase in M-csf and Cxcl3 levels in response to MLO-Y4 compression. These findings demonstrate that YAP/TAZ signaling is required for osteocyte-like cell mechano-transduction, regulates the gene expression profiles and controls chemokine expression.
Identifiants
pubmed: 34521992
doi: 10.1038/s41374-021-00668-5
pii: S0023-6837(22)00387-7
doi:
Substances chimiques
Adaptor Proteins, Signal Transducing
0
Chemokines
0
Wwtr1 protein, mouse
0
YAP-Signaling Proteins
0
Yap1 protein, mouse
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1597-1604Informations de copyright
© 2021. The Author(s), under exclusive licence to United States and Canadian Academy of Pathology.
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