Interstitial cells were labelled by immunostaining with an anti-Vimentin antibody to reveal fibroblast proliferation in the interstitium. First, the specimens were incubated with the anti-Vimentin primary antibody (1:400; Proteintech, Rosemont, IL, USA) at 4 °C overnight and each slide contained a negative control. Next, the anti-Vimentin primary antibody was visualized using a one-step polymer detection kit (Maixin, Fuzhou, China). Finally, the results were observed and evaluated as described by Liu et al. [36 (link)].
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