Mechanical loading differentially regulates membrane-bound and soluble RANKL availability in MC3T3-E1 cells

Dae Won Kim, Hahn Jun Lee, Jaime A. Karmin, Se Eun Lee, Seong Sil Chang, Ben Tolchin, Shiphin Lin, Sam K. Cho, Anthony Kwon, Jae Mok Ahn, Francis Young In Lee

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

To understand the biochemical response of RANKL in response to mechanical loading, MC3T3-E1 cells were biequiaxially stretched. A murine RANKL cDNA with double epitopes, pEF6 HA-RANKL-V5His, was transfected into MC3T3-E1 cells, which were then stretched. Endogenous RANKL protein expression increased in response to mechanical loading. Membrane-bound RANKL (HA-RANKL-V5His) increased in cell lysates while soluble RANKL (RANKL-V5His) decreased in the conditioned media after mechanical loading. This may have resulted from the decreased activity of TACE after mechanical loading. Increased membrane-bound RANKL may be one of the mechanisms through which osteoblasts adapt to mechanical loading by regulating osteoclastogenic activity in a region-specific manner.

Original languageEnglish
Pages (from-to)568-572
Number of pages5
JournalAnnals of the New York Academy of Sciences
Volume1068
Issue number1
DOIs
StatePublished - Apr 2006
Externally publishedYes

Keywords

  • Mechanical loading
  • Osteoblast
  • RANKL
  • TACE

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