Journal: Nature cardiovascular research
Article Title: Angiopoietin-TIE2 feedforward circuit promotes PIK3CA-driven venous malformations.
doi: 10.1038/s44161-025-00655-9
Figure Lengend Snippet: Fig. 6 | Increased TIE2 phosphorylation and SMC coverage in Pik3ca-driven VM in mice. a, PLA staining of activated TIE2 on ear skin paraffin sections from Pik3caH1047R;Vegfr1-CreERT2 and Cre− littermate Ctrl mice, detected using pTyr and TIE2 antibodies. DAPI marks cell nuclei. b, Quantification of PLA signals within PECAM1+ blood vessels. Data represent the number of PLA dots per μm2 of PECAM1+ vessel area, mean ± s.d. (n = 8 (Ctrl) and n = 26 (Pik3caH1047R) vessels from four mice per genotype, unpaired two-tailed Student’s t-test, ****P = 0.0000054). c, Immunofluorescence of ear skin paraffin sections from Pik3caH1047R;Vegfr1- CreERT2 and Cre− littermate Ctrl mice using phospho-TIE2 antibodies. d, Phospho- TIE2 signal within EMCN+ vessels, represented as corrected total cell fluorescence (CTFC) of EMCN+ vessel area. Data points represent pTIE2 CTFC, mean ± s.d. (n = 20 (Ctrl) and n = 31 (Pik3caH1047R) vessels from two mice per genotype, unpaired two-tailed Student’s t-test, ****P = 0.000096; Extended Data Fig. 8d). e, Whole-mount immunofluorescence of ear skin from Pik3caH1047R;
Article Snippet: Human paraffin sections (5 μm) were treated as described above and antibodies used were rabbit pTyr (P-Tyr-1000 MultiMab, Cell Signaling, 8954, dilution 1:200) and goat anti-human TIE2 (R&D Systems, AF313, dilution 1:200).
Techniques: Phospho-proteomics, Staining, Two Tailed Test, Immunofluorescence, Fluorescence