Journal: Frontiers in Cell and Developmental Biology
Article Title: miR-1260b inhibits periodontal bone loss by targeting ATF6β mediated regulation of ER stress
doi: 10.3389/fcell.2022.1061216
Figure Lengend Snippet: Cell culture supernatant from miR-1260b mimic/ATF6β small interfering RNA (siRNA)-transfected PDL cells inhibits osteoclastogenesis in CD14 + peripheral blood-derived monocytes (PBMCs). (A) Scheme for the validation of the effect of cell culture supernatant from PDL cells on osteoclast differentiation. PDL cells were transfected with either miRNA mimic (miR-Ctrl or miR-1260b) or siRNA (si-Ctrl or si-ATF6β) for 24 h. After changing the medium, cells were stimulated with tunicamycin (0.5 μg/ml) for 24 h. CD14 + PBMCs were stimulated with M-CSF for 3 days, and then incubated with the cell culture supernatant from PDL cells as described above for additional 3 days. PBMCs were further stimulated with the receptor activator of NF-κB ligand (RANKL)/macrophage colony-stimulating factor (M-CSF) for up to 14 days (B) Representative images of tartrate-resistant acid phosphatase (TRAP) staining. Scale bar = 200 μm. (C,D) Osteoclast differentiation was evaluated by the number of TRAP-positive multinucleated cells (MNCs) (7 or 10 ≤ nuclei) (C) and the size of TRAP-positive MNCs (3 ≤ nuclei) (D) . n = 3. (E) Representative images of the resorption pit on the calcium phosphate (CaP)-coated plate. Scale bar = 200 μm. (F) Total resorbed area in each culture was measured. n = 3. * p < 0.05, ** p < 0.01, **** p < 0.0001. The significance of differences between groups was determined using one-way ANOVA, followed by correction for multiple comparisons with Tukey’s post hoc test.
Article Snippet: Human CD14 + peripheral blood-derived monocytes (PBMCs) were purchased from Lonza (Basel, Switzerland).
Techniques: Cell Culture, Small Interfering RNA, Transfection, Derivative Assay, Incubation, Staining