Journal: bioRxiv
Article Title: TAR syndrome causal gene RBM8A is critical for embryonic bone development and proper Hedgehog signaling
doi: 10.64898/2026.04.21.718480
Figure Lengend Snippet: A. Immunofluorescence staining of cultured human bone marrow-derived mesenchymal stem cells showing CD90 (green) and RBM8A (red). Merged image (right) demonstrates RBM8A localization in CD90-positive cells. Scale bar = 50 µm. B. Whole-mount immunofluorescence staining of E10.5 mouse embryo section showing RBM8A (red), SOX9 (green), and merged image with DAPI (blue). RBM8A is broadly expressed, with high expression in the limb bud. In the neural crest, RBM8A expression is decreased in SOX9-positive regions. Scale bar = 200 µm. C. Whole-mount immunofluorescence staining of E14.5 mouse forelimb autopod sections showing RBM8A (red), SOX9 (green), and merged image with DAPI (blue). RBM8A is broadly distributed throughout the autopod, including SOX9-positive cartilage condensation. Scale bar = 200 µm. D. Whole-mount immunofluorescence staining of E14.5 mouse forelimb zeugopod longitudinal tissue section showing RBM8A (red), SOX9 (green), and merged image with DAPI (blue). RBM8A is detected in and around SOX9-positive skeletal condensations, including the central region of the developing cartilage element. Scale bar = 200 µm.
Article Snippet: Human bone marrow-derived MSCs were obtained from ATCC (catalog #: PCS-500-012) and cultured using Bone Marrow-Mesenchymal Stem Cell Basal Medium (ATCC, catalog #: PCS-500-030) with 7% FBS and growth factor supplements (15 ng/ml IGF-1, 125 ng/ml FGF2).
Techniques: Immunofluorescence, Staining, Cell Culture, Derivative Assay, Expressing