Journal: Experimental & Molecular Medicine
Article Title: Megakaryocytic TGFβ1 orchestrates osteogenesis of LepR + SSCs to alleviate radiation-induced bone loss
doi: 10.1038/s12276-025-01612-z
Figure Lengend Snippet: a Representative micro-CT images of longitudinal section femurs, cross-sectional view of the distal femurs and reconstructed trabecular structure of the region of interest from Slc39a14 leprΔ/Δ mice and their littermate controls (Slc39a14 fl/fl mice) ( n = 6 mice per group). b Quantitative micro-CT analysis of the TB fraction (BV/TV, Tb.N, Tb.Th, Tb.Sp, BMD and Ct.Th) in Slc39a14 leprΔ/Δ mice and their littermate controls (Slc39a14 fl/fl mice) ( n = 6 mice per group). c Quantitative biomechanical analysis of femora (peak load and stiffness) from MK deleted mice and their littermate controls (Slc39a14 fl/fl mice) ( n = 6 mice per group). d Serum zinc concentration in Slc39a14 leprΔ/Δ mice and their littermate controls (Slc39a14 fl/fl mice) ( n = 6 per group). e Von Kossa staining showing mineralization of bone matrix in Slc39a14 leprΔ/Δ mice and their littermate controls (Slc39a14 fl/fl mice) ( n = 6 per group). f Representative micro-CT images of longitudinal section femurs, cross-sectional view of the distal femurs and reconstructed trabecular structure of the region of interest from Slc39a14 leprΔ/Δ mice injected with TPO or vehicle after irradiation ( n = 6 mice per group). g Representative immunostaining images of OCN (red) in the TB and EB of the Slc39a14 leprΔ/Δ mice injected with TPO or vehicle after irradiation. The quantification of OCN cells is shown on the right ( n = 6 mice per group). Scale bar, 100 µm. h Representative immunostaining images of LepR (red) and PTP1B (green) in the BM of the Slc39a14 leprΔ/Δ mice injected with TPO or vehicle after irradiation. Scale bar, 100 µm. i Colocalization of LepR (red) with Ki67 (green) in the BM of the Slc39a14 leprΔ/Δ mice injected with TPO or vehicle after irradiation ( n = 6 mice per group). Scale bar, 100 µm. j Representative immunostaining images of TUNEL (green) in the BM of the Slc39a14 leprΔ/Δ mice injected with TPO or vehicle after irradiation. The quantification of tunel positive cells is shown on the right ( n = 6 mice per group). Scale bar, 100 µm. Data on graphs are shown as mean ± SD. An unpaired two-tailed t -test was used to analyze the data in b – d , g , i and j . * P < 0.05, ** P < 0.01 and *** P < 0.001. For all panels in this figure, data are representative of three independent experiments.
Article Snippet: Briefly, the bone sections were incubated with primary antibodies against mouse osteocalcin (A20800, ABclonal), Ki67 (AF7617, R&D), PTP1B (bs-55182R, Bioss), Slc39a14 (A10413, ABclonal), leptin receptor (bs-0410R, Bioss), CHOP ( A21902 , ABclonal), F4/80 (30325, CST), TGFβ1 (ab313729, abcam), vWF (bsm-52775R, Bioss), osterix (ab209484, abcam) and Smad2 (A7699, ABclonal) overnight at 4 °C and incubated with secondary antibodies for 1 h at 37 °C.
Techniques: Micro-CT, Concentration Assay, Staining, Injection, Irradiation, Immunostaining, TUNEL Assay, Two Tailed Test