slit3  (Proteintech)

Journal: Stem Cell Research & Therapy

Article Title: SLIT3/ROBO1 axis contributes to angiogenic–osteogenic coupling in endothelial progenitor cells and peripheral blood mesenchymal stem cells

doi: 10.1186/s13287-026-04960-3

Figure Lengend Snippet: The SLIT3/ROBO1 axis expression in EPCs/PBMSCs sheets. A Representative pictures of EPCs/PBMSCs sheets at 1 d, 3 d, 7 d, 10 d, and 14 d of co-culture. The PBMSCs and EPCs were respectively circled with blue and orange dotted lines. Scale: 20–500 μm. B The expression and localization of the SLIT3/ROBO1 axis in EPCs/PBMSCs sheets were detected by IF staining and statistically analyzed ( N = 3). The co-localization of SLIT3 and ROBO1 was analyzed using Image J and the Coloc 2 plugin, characterized by the Person’s Coefficient and the Overlap Coefficient. Scale: 500 μm

Article Snippet: The closed alveolar bone sections were successively incubated with corresponding antibodies, including Mouse CD31 mAb (1:80; MA1-80069, Thermo Scientific), Rabbit EMCN-Cy5 pAb (1:100; bs-5884R, Bioss), Rabbit SLIT3 pAb (1:100; bs-7880R, Bioss), and Rabbit ROBO1-Cy5 pAb (1:150; bs-5794R, Bioss).

Techniques: Expressing, Co-Culture Assay, Staining

Journal: Stem Cell Research & Therapy

Article Title: SLIT3/ROBO1 axis contributes to angiogenic–osteogenic coupling in endothelial progenitor cells and peripheral blood mesenchymal stem cells

doi: 10.1186/s13287-026-04960-3

Figure Lengend Snippet: Effects of shRNA lentivirus and neutralizing antibodies on SLIT3 and ROBO1 expression in EPCs/PBMSCs sheets. A, B The effects of shRNA lentivirus on SLIT3 protein and mRNA expression in PBMSCs were detected by RT-qPCR ( A ) and western blotting assays ( B ) ( N = 3). C The effect of SLIT3 shRNA lentivirus and ROBO1-neutralizing antibodies on SLIT3 levels in the supernatant of EPCs/PBMSCs sheets was detected by ELISA assay ( N = 3). D Representative images of gel bot for SLIT3 and ROBO1 in EPCs/PBMSCs sheets ( N = 3). Original gel blots see supplementary material

Article Snippet: The closed alveolar bone sections were successively incubated with corresponding antibodies, including Mouse CD31 mAb (1:80; MA1-80069, Thermo Scientific), Rabbit EMCN-Cy5 pAb (1:100; bs-5884R, Bioss), Rabbit SLIT3 pAb (1:100; bs-7880R, Bioss), and Rabbit ROBO1-Cy5 pAb (1:150; bs-5794R, Bioss).

Techniques: shRNA, Expressing, Quantitative RT-PCR, Western Blot, Enzyme-linked Immunosorbent Assay

Journal: Stem Cell Research & Therapy

Article Title: SLIT3/ROBO1 axis contributes to angiogenic–osteogenic coupling in endothelial progenitor cells and peripheral blood mesenchymal stem cells

doi: 10.1186/s13287-026-04960-3

Figure Lengend Snippet: Effect of the SLIT3/ROBO1 axis on angiogenic–osteogenic coupling in EPCs/PBMSCs sheets. A Representative pictures of alizarin red staining for each group of EPCs/PBMSCs sheets ( N = 3). B Representative images of gel bolt for osteogenesis-related markers (ALP, RUNX2, and OCN) and vascular-related markers (CD31) ( N = 3). C The effects of the SLIT3/ROBO1 axis on vascular-osteogenic coupling of EPCs/PBMSCs sheets were observed by IF staining ( N = 3). Scale: 100 μm. The co-localization of CD31 and EMCN was analyzed using Image J and the Coloc 2 plugin, characterized by the Person’s Coefficient and the Overlap Coefficient. Original gel blots see supplementary material

Article Snippet: The closed alveolar bone sections were successively incubated with corresponding antibodies, including Mouse CD31 mAb (1:80; MA1-80069, Thermo Scientific), Rabbit EMCN-Cy5 pAb (1:100; bs-5884R, Bioss), Rabbit SLIT3 pAb (1:100; bs-7880R, Bioss), and Rabbit ROBO1-Cy5 pAb (1:150; bs-5794R, Bioss).

Techniques: Staining

Journal: Stem Cell Research & Therapy

Article Title: SLIT3/ROBO1 axis contributes to angiogenic–osteogenic coupling in endothelial progenitor cells and peripheral blood mesenchymal stem cells

doi: 10.1186/s13287-026-04960-3

Figure Lengend Snippet: Effect of the SLIT3/ROBO1 axis on bone regeneration mediated by EPCs/PBMSCs in alveolar bone defect models was detected by Micro CT. A Representative images of Micro CT of alveolar bone in the EPCs/PBMSCs, EPCs/shNC-PBMSCs, EPCs/shSLIT3-PBMSCs, anti-ROBO1-EPCs/PBMSCs, and anti-ROBO1-EPCs/shSLIT3-PBMSCs groups ( N = 3). B Differential expression analysis of BV/TV, Tb.Th, Tb.N and Tb.Sp of regenerated alveolar bone in the EPCs/PBMSCs, EPCs/shNC-PBMSCs, EPCs/shSLIT3-PBMSCs, anti-ROBO1-EPCs/PBMSCs, and anti-ROBO1-EPCs/shSLIT3-PBMSCs groups ( N = 3)

Article Snippet: The closed alveolar bone sections were successively incubated with corresponding antibodies, including Mouse CD31 mAb (1:80; MA1-80069, Thermo Scientific), Rabbit EMCN-Cy5 pAb (1:100; bs-5884R, Bioss), Rabbit SLIT3 pAb (1:100; bs-7880R, Bioss), and Rabbit ROBO1-Cy5 pAb (1:150; bs-5794R, Bioss).

Techniques: Micro-CT, Quantitative Proteomics

Journal: Stem Cell Research & Therapy

Article Title: SLIT3/ROBO1 axis contributes to angiogenic–osteogenic coupling in endothelial progenitor cells and peripheral blood mesenchymal stem cells

doi: 10.1186/s13287-026-04960-3

Figure Lengend Snippet: Effect of the SLIT3/ROBO1 axis on the therapeutic efficacy of EPCs/PBMSCs was characterized in alveolar bone defect models using tissue staining. A, B Bone regeneration of alveolar bone defect models in the EPCs/PBMSCs, EPCs/shNC-PBMSCs, EPCs/shSLIT3-PBMSCs, anti-ROBO1-EPCs/PBMSCs, and anti-ROBO1-EPCs/shSLIT3-PBMSCs groups was evaluated by HE ( A ) and MASSON ( B ) staining ( N = 3). Scale: 3–500 μm. C Representative images of IHC staining for SLIT3, ROBO1, CD31 and EMCN proteins in the EPCs/PBMSCs, EPCs/shNC-PBMSCs, EPCs/shSLIT3-PBMSCs, anti-ROBO1-EPCs/PBMSCs, and anti-ROBO1-EPCs/shSLIT3-PBMSCs groups ( N = 3). Scale: 3–500 μm

Article Snippet: The closed alveolar bone sections were successively incubated with corresponding antibodies, including Mouse CD31 mAb (1:80; MA1-80069, Thermo Scientific), Rabbit EMCN-Cy5 pAb (1:100; bs-5884R, Bioss), Rabbit SLIT3 pAb (1:100; bs-7880R, Bioss), and Rabbit ROBO1-Cy5 pAb (1:150; bs-5794R, Bioss).

Techniques: Drug discovery, Staining, Immunohistochemistry

Journal: Bone Research

Article Title: PTH induced osteoblast Slit3 to decrease aberrant sensory innervation in degenerated vertebral endplates to relieve low back pain in mice

doi: 10.1038/s41413-025-00488-z

Figure Lengend Snippet: Osteoblasts respond to PTH treatment with increased Slit3 transcription and translation. mRNA expression of the Slit3 in the endplate tissue of WT young mice treated with Veh and aged mice treated with Veh or PTH for 1 month ( a ), and WT LSI mice treated with veh or PTH for 2 months ( b ) ( n = 3, one-way ANOVA with Tukey’s multiple comparisons test). c mRNA expression of the Slit3 in MC3T3 cells cultured in osteoblast-stimulated medium and subsequently treated with Veh or PTH at different doses for 3 days ( n = 3, t -test). d , e Protein expression level of Slit3 in MC3T3 cells cultured in osteoblast-stimulated medium and treated with Veh (PBS) or PTH for 3 days. ( n = 3, t -test). Representative images ( f ) and quantification ( g ) of IF staining of PGP9.5 positive primary DRG neuron fibers crossing the microgroove barrier (microfluid assay) cultured in condition medium (CM), CM + PTH, CM + PTH plus mouse Slit3 antibody (1 µg/mL), or CM + Veh (1X PBS) plus human recombinant Slit3 (1.25 µg/mL) for 1 week. Representative images showing co-immunostaining for OCN (green) and Slit3 (red) in the lumbar spine sections and quantitative analysis of number of Slit3 + cells in trabecular bone (TB) and endplate (EP) of aged mice ( h – j ) and PPR OCN −/− LSI mice ( k – m ) treated with PTH or Veh for 2 months. Scale bar: 100 µm. ( n ≥ 5, t -test). * P < 0.05, ** P < 0.01, *** P < 0.005, **** P < 0.001

Article Snippet: Different interventions were administered to the wells: 150 μL conditioned medium from vehicle or PTH-treated osteoblasts, with or without Slit3 antibody (1 μg/mL, AF3629, R&D Systems), or human recombinant Slit3 protein (1.25 μg/mL, 9067-SL, Biotechne), for 1 week.

Techniques: Expressing, Cell Culture, Staining, Recombinant, Immunostaining

Journal: Bone Research

Article Title: PTH induced osteoblast Slit3 to decrease aberrant sensory innervation in degenerated vertebral endplates to relieve low back pain in mice

doi: 10.1038/s41413-025-00488-z

Figure Lengend Snippet: Transcriptional mechanism underpinning Slit3 secretion. a mRNA expression levels of Ets1, E47, FoxJ2 , and FoxA2 genes in MC3T3 cells cultured in osteoblast differentiation-inducing medium and treated with vehicle or PTH (100 nmol/L) for 3 days ( n = 3, t -test). b , c Protein expression level of E47, FoxA2 in MC3T3 cells cultured in stimulated medium and treated with PTH or Veh (PBS) for 3 days ( n = 3, t -test). Representative images depicting E47 IF staining (green) in lumbar vertebral body and endplate sections ( d ), quantitative analysis of the number of E47 + cells in the vertebral body ( e ) and endplate ( f ) of aged mice treated with Veh or PTH ( n = 5, t -tset). Scale bar: 100 µm. Representative images showing FoxA2 IF staining (red) in lumbar vertebral body and endplate sections ( g ), quantitative analysis of the number of FoxA2 + cells in the vertebral body ( h ) and endplate ( i ) of aged mice treated with PTH or vehicle for 2 months ( n = 5, t -tset). Scale bar: 100 µm. j Relative fold enrichment of the E47 binding site in the Slit3 promoter region from stimulated MC3T3 cells treated with vehicle or PTH (100 nmol/L) for 3 days ( n = 3, two-way ANOVA with Sidak’s multiple comparisons test). k Relative fold enrichment of the FoxA2 binding site in the Slit3 promoter region from stimulated MC3T3 cells treated with vehicle or PTH (100 nmol/L) for 3 days ( n = 3, two-way ANOVA with Sidak’s multiple comparisons test). * P < 0.05, ** P < 0.01, *** P < 0.005, **** P < 0.001

Article Snippet: Different interventions were administered to the wells: 150 μL conditioned medium from vehicle or PTH-treated osteoblasts, with or without Slit3 antibody (1 μg/mL, AF3629, R&D Systems), or human recombinant Slit3 protein (1.25 μg/mL, 9067-SL, Biotechne), for 1 week.

Techniques: Expressing, Cell Culture, Staining, Binding Assay

Journal: Bone Research

Article Title: PTH induced osteoblast Slit3 to decrease aberrant sensory innervation in degenerated vertebral endplates to relieve low back pain in mice

doi: 10.1038/s41413-025-00488-z

Figure Lengend Snippet: Efficacy of PTH treatment is diminished in osteoblastic Slit3 knockout mice with spinal degeneration. Vertebral endplate bone structure analyses by micro-CT: bone volume per tissue volume (BV/TV) percentage ( a ), total porosity percentage ( b ), and total pore space ( c ) in Slit3 OCN −/− LSI mice with PTH (40 µg/kg/d) or Veh treatment for 2 months ( n = 7, t -test). Behavior evaluations included pressure tolerance of the lumbar spine assessed via the force threshold ( d ), total distance covered in spontaneous activity in 2 days ( e ), and latency of paw withdrawal post-thermal stimulation ( f ) for Slit3 OCN −/− LSI mice with PTH or Veh treatment for 2 months ( n = 7, t -test). g Western blot analysis of protein expression levels of β3 tubulin, CGRP, PGP9.5 relative to GAPDH in endplate tissue (L3-L5) in Slit3 OCN −/− LSI mice treated with PTH or Veh for 2 months. ( n = 5). Representative images of PGP9.5 (red) and CGRP (green)-positive fibers ( h ) and quantitative analysis of fiber length in the lumbar vertebral body of Slit3 OCN −/− LSI mice with PTH or Veh treatment ( i , j ) ( n = 5, t -tset). Scale bar: 100 µm. k Western blot analysis of protein expression levels of CGRP in DRG tissue (L1–L2), normalized to GAPDH expression, in Slit3 OCN −/− LSI mice treated with PTH or Veh for 2 months ( n = 5). Representative IF images showing CGRP-positive (green) neurons in DRG sections ( l ), followed by quantitative analysis of the mean IF intensity for CGRP ( m ) in the DRG of Slit3 OCN −/− LSI mice treated with PTH or Veh for 2 months ( n = 5, t -tset). Scale bar: 100 µm

Article Snippet: Different interventions were administered to the wells: 150 μL conditioned medium from vehicle or PTH-treated osteoblasts, with or without Slit3 antibody (1 μg/mL, AF3629, R&D Systems), or human recombinant Slit3 protein (1.25 μg/mL, 9067-SL, Biotechne), for 1 week.

Techniques: Knock-Out, Micro-CT, Activity Assay, Western Blot, Expressing

Journal: Bone Research

Article Title: PTH induced osteoblast Slit3 to decrease aberrant sensory innervation in degenerated vertebral endplates to relieve low back pain in mice

doi: 10.1038/s41413-025-00488-z

Figure Lengend Snippet: Osteoblasts respond to PTH treatment with increased Slit3 transcription and translation. mRNA expression of the Slit3 in the endplate tissue of WT young mice treated with Veh and aged mice treated with Veh or PTH for 1 month ( a ), and WT LSI mice treated with veh or PTH for 2 months ( b ) ( n = 3, one-way ANOVA with Tukey’s multiple comparisons test). c mRNA expression of the Slit3 in MC3T3 cells cultured in osteoblast-stimulated medium and subsequently treated with Veh or PTH at different doses for 3 days ( n = 3, t -test). d , e Protein expression level of Slit3 in MC3T3 cells cultured in osteoblast-stimulated medium and treated with Veh (PBS) or PTH for 3 days. ( n = 3, t -test). Representative images ( f ) and quantification ( g ) of IF staining of PGP9.5 positive primary DRG neuron fibers crossing the microgroove barrier (microfluid assay) cultured in condition medium (CM), CM + PTH, CM + PTH plus mouse Slit3 antibody (1 µg/mL), or CM + Veh (1X PBS) plus human recombinant Slit3 (1.25 µg/mL) for 1 week. Representative images showing co-immunostaining for OCN (green) and Slit3 (red) in the lumbar spine sections and quantitative analysis of number of Slit3 + cells in trabecular bone (TB) and endplate (EP) of aged mice ( h – j ) and PPR OCN −/− LSI mice ( k – m ) treated with PTH or Veh for 2 months. Scale bar: 100 µm. ( n ≥ 5, t -test). * P < 0.05, ** P < 0.01, *** P < 0.005, **** P < 0.001

Article Snippet: A range of primary antibodies was used for this purpose, including those specific for mouse β3 tubulin (1:500, 2G10, Thermo Fisher), CGRP (1:1 000, sc-57053, Santa Cruz), PGP9.5 (1:1 000, SAB4503057, Sigma), IB4 (1:1 000, I21441 , Thermo Fisher), TH (1:1 000, AB152, Sigma), Slit3 (1:1 000, AF3629, Biotechne), E47 (1:1 000, sc-416, Santa Cruz), FoxA2 (1:1 000, 22474-1-AP, Proteintech), and GAPDH (1:2 000, 14C10, Cell Signaling), which facilitated the determination of protein concentrations in the lysates.

Techniques: Expressing, Cell Culture, Staining, Recombinant, Immunostaining

Journal: Bone Research

Article Title: PTH induced osteoblast Slit3 to decrease aberrant sensory innervation in degenerated vertebral endplates to relieve low back pain in mice

doi: 10.1038/s41413-025-00488-z

Figure Lengend Snippet: Transcriptional mechanism underpinning Slit3 secretion. a mRNA expression levels of Ets1, E47, FoxJ2 , and FoxA2 genes in MC3T3 cells cultured in osteoblast differentiation-inducing medium and treated with vehicle or PTH (100 nmol/L) for 3 days ( n = 3, t -test). b , c Protein expression level of E47, FoxA2 in MC3T3 cells cultured in stimulated medium and treated with PTH or Veh (PBS) for 3 days ( n = 3, t -test). Representative images depicting E47 IF staining (green) in lumbar vertebral body and endplate sections ( d ), quantitative analysis of the number of E47 + cells in the vertebral body ( e ) and endplate ( f ) of aged mice treated with Veh or PTH ( n = 5, t -tset). Scale bar: 100 µm. Representative images showing FoxA2 IF staining (red) in lumbar vertebral body and endplate sections ( g ), quantitative analysis of the number of FoxA2 + cells in the vertebral body ( h ) and endplate ( i ) of aged mice treated with PTH or vehicle for 2 months ( n = 5, t -tset). Scale bar: 100 µm. j Relative fold enrichment of the E47 binding site in the Slit3 promoter region from stimulated MC3T3 cells treated with vehicle or PTH (100 nmol/L) for 3 days ( n = 3, two-way ANOVA with Sidak’s multiple comparisons test). k Relative fold enrichment of the FoxA2 binding site in the Slit3 promoter region from stimulated MC3T3 cells treated with vehicle or PTH (100 nmol/L) for 3 days ( n = 3, two-way ANOVA with Sidak’s multiple comparisons test). * P < 0.05, ** P < 0.01, *** P < 0.005, **** P < 0.001

Article Snippet: A range of primary antibodies was used for this purpose, including those specific for mouse β3 tubulin (1:500, 2G10, Thermo Fisher), CGRP (1:1 000, sc-57053, Santa Cruz), PGP9.5 (1:1 000, SAB4503057, Sigma), IB4 (1:1 000, I21441 , Thermo Fisher), TH (1:1 000, AB152, Sigma), Slit3 (1:1 000, AF3629, Biotechne), E47 (1:1 000, sc-416, Santa Cruz), FoxA2 (1:1 000, 22474-1-AP, Proteintech), and GAPDH (1:2 000, 14C10, Cell Signaling), which facilitated the determination of protein concentrations in the lysates.

Techniques: Expressing, Cell Culture, Staining, Binding Assay

Journal: Bone Research

Article Title: PTH induced osteoblast Slit3 to decrease aberrant sensory innervation in degenerated vertebral endplates to relieve low back pain in mice

doi: 10.1038/s41413-025-00488-z

Figure Lengend Snippet: Efficacy of PTH treatment is diminished in osteoblastic Slit3 knockout mice with spinal degeneration. Vertebral endplate bone structure analyses by micro-CT: bone volume per tissue volume (BV/TV) percentage ( a ), total porosity percentage ( b ), and total pore space ( c ) in Slit3 OCN −/− LSI mice with PTH (40 µg/kg/d) or Veh treatment for 2 months ( n = 7, t -test). Behavior evaluations included pressure tolerance of the lumbar spine assessed via the force threshold ( d ), total distance covered in spontaneous activity in 2 days ( e ), and latency of paw withdrawal post-thermal stimulation ( f ) for Slit3 OCN −/− LSI mice with PTH or Veh treatment for 2 months ( n = 7, t -test). g Western blot analysis of protein expression levels of β3 tubulin, CGRP, PGP9.5 relative to GAPDH in endplate tissue (L3-L5) in Slit3 OCN −/− LSI mice treated with PTH or Veh for 2 months. ( n = 5). Representative images of PGP9.5 (red) and CGRP (green)-positive fibers ( h ) and quantitative analysis of fiber length in the lumbar vertebral body of Slit3 OCN −/− LSI mice with PTH or Veh treatment ( i , j ) ( n = 5, t -tset). Scale bar: 100 µm. k Western blot analysis of protein expression levels of CGRP in DRG tissue (L1–L2), normalized to GAPDH expression, in Slit3 OCN −/− LSI mice treated with PTH or Veh for 2 months ( n = 5). Representative IF images showing CGRP-positive (green) neurons in DRG sections ( l ), followed by quantitative analysis of the mean IF intensity for CGRP ( m ) in the DRG of Slit3 OCN −/− LSI mice treated with PTH or Veh for 2 months ( n = 5, t -tset). Scale bar: 100 µm

Article Snippet: A range of primary antibodies was used for this purpose, including those specific for mouse β3 tubulin (1:500, 2G10, Thermo Fisher), CGRP (1:1 000, sc-57053, Santa Cruz), PGP9.5 (1:1 000, SAB4503057, Sigma), IB4 (1:1 000, I21441 , Thermo Fisher), TH (1:1 000, AB152, Sigma), Slit3 (1:1 000, AF3629, Biotechne), E47 (1:1 000, sc-416, Santa Cruz), FoxA2 (1:1 000, 22474-1-AP, Proteintech), and GAPDH (1:2 000, 14C10, Cell Signaling), which facilitated the determination of protein concentrations in the lysates.

Techniques: Knock-Out, Micro-CT, Activity Assay, Western Blot, Expressing