Figure 5: Bcl-2 expression in the kidney tissues of rats. (A) The Bcl-2 expression is negative in the control group. (B) Mild cytoplasmic Bcl-2 expression is observed in the tubular epithelium of acrylamide-treated rats (arrowheads). (C) Moderate cytoplasmic Bcl-2 expression is found in the group treated with acrylamide and 50 mg/kg of naringin (arrowheads). (D) The group treated with acrylamide and 100 mg/kg of naringin shows severe cytoplasmic Bcl-2 expression in the tubular epithelium (arrowheads). (E) Bcl-2 expression is negative in the group treated with 100 mg/kg of naringin alone. IHC-P, Bar: 50 μm; Magnification: ×40.