Journal: eLife
Article Title: Species-specific sensitivity to TGFβ signaling and changes to the Mmp13 promoter underlie avian jaw development and evolution
doi: 10.7554/eLife.66005
Figure Lengend Snippet: Quail lower jaws harvested at HH35 and placed in culture with control beads (left side) and treatment beads (right side) soaked in ( A ) TGFβR1 inhibitor (TGFβi, n=5), ( B ) SMAD3 inhibitor (SMAD3i, n=5), and ( C ) MMP13 inhibitor (MMP13i, n=5). The effects of inhibitor treatments can be seen on TRAP staining (red) after 5 days of culture (red dashed lines). Quantification of the % area of TRAP-positive staining for ( D ) TGFβR1 inhibitor (medium gray), ( E ) SMAD3 inhibitor (white), and ( F ) MMP13 inhibitor (dark gray) in comparison to the contralateral control side. ( G ) In ovo electroporations of the pPIDNB- Mmp13 OE construct were performed at HH8.5 and embryos were allowed to develop until HH35 when they were treated with a single dose of dox. Electroporation efficiency and extent of OE were evaluated during embryo collection at HH40 by detecting RFP (red). Microcomputed tomography (µCT) analysis of duck specimens electroporated with ( H ) empty vector or ( I ) Mmp13 OE construct. A 3D model was annotated with landmarks from which ( J ) lower jaw distances were calculated. Embryos overexpressing Mmp13 showed significantly shorter jaws compared to empty vector controls. * denotes significance from control within each group p≤0.05, ** denotes significance from control within each group p≤0.01, and *** denotes significance from control within each group p≤0.001. Figure 5—source data 1. Effects of TGFβR1, SMAD3, and MMP13 inhibition on TRAP staining in quail embryos. Figure 5—source data 2. Effects of MMP13 overexpression on jaw length in duck embryos as visualized by µCT.
Article Snippet: Membranes were probed with 1:1000 rabbit anti-human pSer423/pSer425 SMAD3 antibody (NBP1-77836, Novus Biologicals, Littleton, CO), 1:1000 rabbit anti-human SMAD3 antibody (NB100-56479, Novus Biologicals, Littleton, CO), 1 μg/ml rabbit anti-chick MMP13 custom-made primary antibody (GenScript, Piscataway, NJ; ), 1:1000 rabbit anti-human MMP2 antibody (NB200-193, Novus Biologicals, Littleton, CO), 1:4000 mouse anti-human β-actin antibody (NB600-501, Novus Biologicals, Littleton, CO), 1:15,000 goat anti-rabbit IRDye 800CW (925–32211, LI-COR, Lincoln, NE), and 1:15,000 donkey anti-mouse IRDye 680RD antibody ( ; 925–68072, LI-COR, Lincoln, NE).
Techniques: Control, Staining, Comparison, In Ovo, Construct, Electroporation, Tomography, Plasmid Preparation, Inhibition, Over Expression