A study on the role of cholinergic and gamma amino butyric acid systems in the anti-nociceptive effect of gossypin.

1. The participation of cholinergic and gamma amino butyric acid (GABA) neurotransmitter systems in the anti-nociceptive effect of gossypin was investigated using pharmacological tools. 2. Physostigmine potentiated its anti-nociceptive response while atropine failed to modify it significantly. 3. THIP (4,5,6,7-tetra hydroisoxazolo (5,4-C) pyridin-3-ol) and gossypin treatment produced an additive response while bicuculline attenuated the anti-nociceptive response of gossypin. Similar observations were recorded for morphine. 4. It is suggested that cholinergic and GABAergic systems play a role in gossypin-induced anti-nociception.