Representative tissue sections of liver apoptosis and NF-κB P65 expression (×400).

<p>(A) TUNEL-stained liver tissues with different CPT. TUNEL-positive cells are revealed by brown stain (indicated by arrows). (B) Liver immunohistochemistry sections of NF-κB P65 with different CPT. Positive stain was homogeneously distributed in liver sections (indicated by arrow heads).