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. 2019 Mar 14;9:4605. doi: 10.1038/s41598-019-40810-4

Figure 5.

Figure 5

Transactivation of Acan enhancers by PAX1/PAX9 and SOX9/SOX5/SOX6. (a–f) Dual luciferase assays were performed with HEK293T cells (a–c), chondrocytes (d,e), or NIH3T3 cells (f). Cells were co-transfected with reporter plasmids (pGL4.74 [hRluc/TK] and pGL4.23[luc2/minP] or pGL3-Basic vectors) and expression plasmids (pcDNA3 vectors). The pGL4.23[luc2/minP] and pGL3-Basic vectors used for the assays were pGL4.23[luc2/minP]-1xUE-Luc (1xUE-Luc), pGL4.23[luc2/minP]-4xUE-Luc (4xUE-Luc), or pGL4.23[luc2/minP]-I12E-Luc (I12E-Luc), and pGL3-Basic-Nkx3.2-P-Luc (Nkx3.2-P-Luc). The expression plasmids used were pcDNA3 empty vector (pcDNA3), pcDNA3-hSox5 (Sox5), pcDNA3-hSox6 (Sox6), pcDNA3-mSox9 (Sox9), pcDNA3-FLAG-Pax1 (Pax1), or pcDNA3-FLAG-Pax9 (Pax9). For the co-transfection of pcDNA3 vectors in (b), 10 ng each of Sox5, Sox6, and Sox9, and 20 ng of pcDNA3, Pax1, or Pax9 were used. For the co-transfection of pcDNA3 vectors in (f), 25 ng each of Pax1 and Pax9 (the fourth bar from the left), or 25 ng of Sox9 and 25 ng of pcDNA3, Pax1, or Pax9 (from the fifth to the seventh bars from the left), or 12.5 ng each of Pax1 and Pax9 (the right end bar) were used. The firefly and Renilla luciferase activities were measured 24 h after transfection. Values were normalized using a pGL4.74[hRluc/TK] vector and are presented as fold induction relative to pcDNA3 co-transfected with reporter plasmids. Graphs show a representative experiment out of at least three. Each bar represents the average of three independent transfections (means ± s.d.). *P < 0.05 versus pcDNA3, **P < 0.01 versus pcDNA3, ***P < 0.001 versus pcDNA3 (a,c,d,e,f), pcDNA3 + Sox5 + Sox6 + Sox9 (b), or pcDNA3 + Sox9 (f).