Journal: Materials Today Bio
Article Title: Urine-derived stem cells efficiently assemble into micro-bone organoids supported by decellularized bone matrix microparticles for rapidly repairing bone defects through direct filling and paracrine functions
doi: 10.1016/j.mtbio.2025.102533
Figure Lengend Snippet: Evaluation of the in-vivo biological functions of uBOs and its in-vivo tracing. (A, B) After 3 weeks of modeling, immunofluorescence staining was employed to assess the expression levels of osteogenic markers ( RUNX2 , OCN ) and angiogenic markers ( CD31 , VEGF ), and semi-quantitative analysis was performed. Scale bar = 1 mm or 250 μm. (C) qRT-PCR was used to quantitatively detect the gene expression levels of osteogenic markers ( RUNX2 , OCN ) and angiogenic markers ( PDGF-BB , VEGF ) in newly formed bone tissue. (D) After 6 weeks of implantation of uBOs, in-vivo cell tracking was performed using immunohistochemistry. In the uBOs group, more human nuclei-stained cells were detected within the bone trabeculae. Scale bar = 200 μm. Data are presented as mean ± SD (n = 6). p-values are calculated using one-way ANOVA with Bonferroni post hoc test. ∗p < 0.05, ∗∗∗p < 0.001, ∗∗∗∗p < 0.0001, and “ns” indicates no significance.
Article Snippet: Subsequently, the supernatants were harvested and used to quantify the levels of angiogenic factors ( ANG-5 , VEGF-C ) and osteogenic factors ( IGF-2 , OPG ) using ELISA kits (Elabscience or Cusabio, China), following the manufacturer's instructions.
Techniques: In Vivo, Immunofluorescence, Staining, Expressing, Quantitative RT-PCR, Gene Expression, Cell Tracking Assay, Immunohistochemistry