Journal: Stem Cell Research & Therapy
Article Title: Nonthermal radiofrequency radiation promotes hematopoietic stem and progenitor cells function by regulating Ca 2+ efflux
doi: 10.1186/s13287-026-04937-2
Figure Lengend Snippet: RFR enhanced HSPC membrane fluidity and inhibited the activation of calcium-dependent kinases. a Sequential fluorescence patterns in a fluorescence bleach plot of RFR-treated or control HSPCs. Each main panel contains three subpanels: pre-bleach images, immediate post-bleach capture, and membrane recovery phases. Time-to-half-recovery (t1/2) values are annotated in the top right corners of the recovery subpanels. b Corresponding t1/2 values are compared, demonstrating significant differences between two groups. c Quantified fluorescence recovery kinetics through normalized intensity curves: blue (Con), and red (RFR). The x-axis represents time post-bleach (seconds), while the y-axis indicates relative fluorescence intensity. d Phosphorylation levels of downstream calcium-dependent kinases (CaMKII, PKA, PKC, and CREB) by western blot. e Model depicting: non-thermal radiofrequency radiation enhances HSPC function via a membrane fluidity-PMCA activation-Ca 2+ -energy metabolism axis. Datasets represent pooled results from three independent experimental replicates. Values are expressed as mean ± standard deviation (SD), with significance levels indicated as ****, p < 0.0001. Intergroup comparisons employed Student’s t-test for statistical evaluation
Article Snippet: For immunoblotting with phosphorylation-specific primary antibodies (GAPDH, Cell Signaling Technology, #3900; PMCA1, Abcam, #ab190355; Phospho-CaMKII (Thr286) (D21E4), Cell Signaling Technology, #12716; CaMKII Gamma Polyclonal antibody, Proteintech, #12666-2-AP; Phospho-PKCζ/λ(Thr410/403), Cell Signaling Technology, #9378; PKCζ Antibody, Cell Signaling Technology, #9372; PRKACB Polyclonal antibody, Proteintech, #55382-1-AP; Phospho-PKA C (Thr197), Cell Signaling Technology, #4781; Anti-CREB antibody, Abcam, #ab32515; Anti-CREB (phospho S133) antibody, Abcam, #ab32096; Beta Actin Monoclonal antibody, Proteintech, #66009-1-Ig), membranes were blocked with 5% skimmed milk prior to overnight incubation with the designated primary antibodies at 4 °C.
Techniques: Membrane, Activation Assay, Fluorescence, Control, Phospho-proteomics, Western Blot, Standard Deviation