Liver cellular apoptosis expression was studied. TUNEL expression was detected using a ApopTag® Plus Peroxidase In Situ Apoptosis Detection Kit (CHEMICON International Inc., Temecula, CA, USA) according to the manufacturer’s protocol [2 (link),42 (link)]. Deparaffinized sections were washed with distilled water and treated with Protein Digestion Enzyme for 15 min at 37 °C. The number of positively-stained cells was counted from a total of five hundred hepatocytes in each rat.
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