Journal: Scientific reports
Article Title: Mechanical forces trigger invasive behavior in synovial fibroblasts through N-cadherin/ADAM15 -dependent modulation of LncRNA H19.
doi: 10.1038/s41598-025-94012-2
Figure Lengend Snippet: Fig. 8. CDH11-mediated increased cell invasion can be blocked by CDH11 silencing and transfection with miR-130a-3p mimics. (A, B) RASFs were treated with H19 siRNA or negative nonsilencing siRNA (N) and (A) MTT-based cell viability assays and (B) cells transmigrated through matrigel were stained with DAPI, the whole transwell photographed and all cells counted. (C) upper panel, invaded cells prior transfected with 130a- 3p mimics, CDH11 siRNA or scramble control, shown is the mean ± SD from 5 different RASFs. (C) lower panel, immunoblots for CDH11 from cells transfected and strained as in upper panel. *p < 0.05, **p < 0.005, ***p < 0.0005, Student’s test. (D) diagram of summarized results: mechanical strain results in NCAD/ADAM15- mediated phosphorylation of PAK2, resulting in the downregulation of lncRNA H19 and miR-130a-3p and subsequent upregulation of CDH11, which in turn promotes an aggressive phenotype: increased cell invasion. Inhibition of PAK signaling by PAK inhibitor IPA-3 blocks mechano-induced H19 downregulation and subsequently CDH11 upregulation. In addition, mechano-induced PAK2 phosphorylation is accompanied by recruitment of SH2/SH3 adapter Nck and PAK2 to the NCAD/ADAM15 complex, but binding of Nck/PAK2 is restricted to the cytoplasmic domain of ADAM15. The mechano-induced redistribution of PAK2 to the cell membrane does not occur when Nck is silenced.
Article Snippet: For detection of ADAM15 and NCAD, cells (1 × 104) were grown on 8-chamberslides for 48 h, fixed with 4% PFA, permeabilized with PBS/0.1% Triton X-100 for 5 min, blocked with 1% horse serum and incubated with mouse ADAM15 (R&D Systems, #MAB935, 1:50) and sheep-anti N-cadherin antibodies.
Techniques: Transfection, Staining, Control, Western Blot, Phospho-proteomics, Inhibition, Binding Assay, Membrane