Figure 10: Representative optical fluorescence microscopy images of hABMSCs cultured for 5 days in static conditions (a1–d1) or at 10 min/day (a2–d2), 30 min/day (a3–d3), 60 min/day (a4–d4), 120 min/day (a5–d5), and 180 min/day (a6–d6) by OSS with OM; cell nuclei (a1–a6), actin filaments (b1–b6), gap junction (Cx43, c1–c6), and merged images (d1–d6) of the fluorescence stains. Fluorescence images showed more intense observation at OSS groups compared to those of control (arrows: cell direction).