Fig. 1: Degenerated NP tissues had low expression of PRL and its receptor

a H&E and Safranin-O staining of human NP tissues (Scar bar = 500 μm). b Immunohistochemical staining of PRL and its receptor in human NP tissues (Scar bar = 50 μm). c H&E and Safranin-O staining of rat NP tissues (Scar bar = 100 μm). d Immunohistochemical staining of PRL and its receptor in rat NP tissues (Scar bar = 50 μm). e, f Quantification of PRL and its receptor in the NP tissues of humans and rats. *P < 0.05 vs. the normal group, #P < 0.05 vs. the control group