The paraffin-embedded sections were treated with immunohistochemical staining using the primary antibody EZH2 (#5246, 1:50, Rabbit, CST), HMGB1 (1:250, Rabbit, ab79823, Abcam), p-STAT3 (1:500, Rabbit, ab76315, Abcam), cleaved-caspase3 (#9661, 1:200, Rabbit, CST), and cleaved-PARP (#5625, 1:150, Rabbit, CST). The samples were observed under a Leica microscope (Leica M205C). Positive stains were scored according to a previously published method (20 (link)).
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