The present study investigated the attenuating effects of Zn following Cd-exposure in the activities/expression of indoleamine 2, 3-dioxygenase (IDO), tryptophan 2, 3-dioxygenase (TDO), oxidative-inflammatory response, behavioral indices and histologic architecture in cerebral cortex and hippocampus of male rats. Adult male Wistar rats were exposed to 200 μg/L and 100 μg/L of Cd and/or Zn in drinking water for 42 days. Cd exposure significantly increased IDO and TDO activities, IDO 1 protein expression, inflammatory response, with attendant disruption in antioxidant systems and concomitant elevation in malondialdehyde (MDA) levels in the cerebral cortex and hippocampus.
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