Isatin, an endogenous compound identified in humans possesses a wide range of biological properties. Among them the most significant being anxiogenic, anticonvulsant and analgesic activities. Neuropathic pain arises due to damage or permanent alteration of the peripheral or central nervous system. The major inhibitory neurotransmitter of the central nervous system (CNS), γ-aminobutyric acid (GABA) has been implicated in the etiology and pharmacotherapy of different neurological and psychiatric disorders including pain and epileptic conditions. Hence, the present study is aimed at design and synthesis of newer isatinimino GABA derivatives useful in the treatment of neurological disorders like neuropathic pain and epilepsy. Various isatinimino GABA amides were synthesized and screened for peripheral analgesic, antiallodynic, antihyperalgesic and anticonvulsant activities. The structures of the synthesized compounds were confirmed by the use of their spectral data besides elemental analysis. The synthesized derivatives of the inhibitory neurotransmitter GABA produced anticonvulsant and antinociceptive actions in the acetic acid induced writhing test and in two peripheral nerve injury models of neuropathic pain.
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