The protocol of IHC was described previously [36 (link)]. Sections were prepared in 10 μm. The primary antibodies against β-catenin (Abcam, #ab16051, 1:1000), Ki67 (Abcam, #ab245113, 1:1000), PDGFD, E-cadherin (Abcam, #ab1416, 1:500), and N-cadherin (Abcam, #ab76057, 1:1000) were used. Following PBS washes, secondary antibodies (1:1000 was applied to sections. Lastly, the signal was developed by DAB and validated by two experienced pathologists.
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