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Immunohistochemical staining showing NF-kB expression in control (N), GB alone (GB), CIS alone (CIS), and the three GB-protected rats (CIS+L: 50 mg/kg GB; CIS+M: 100 mg/kg GB; CIS+H: 200 mg/kg GB). Photomicrographs show variable levels of NF-kB expression in different experimental groups. Brown staining indicates NF-kB expression. CIS-treated rats show increased NF-kB levels compared to N and all other GB-protected groups. Tissues were counterstained with hematoxylin, 400x.
