Effect of sabeluzole (R 58,735) on memory functions in patients with epilepsy

Area of Science:

• Neuroscience
• Pharmacology
• Clinical Neurology

Background:

• Sabeluzole, a novel benzothiazole derivative, has previously shown promise in enhancing memory function in preclinical and healthy volunteer studies.
• Memory impairment is a significant concern in patients with localization-related (partial) epilepsy.

Purpose of the Study:

• To evaluate the efficacy of sabeluzole in improving memory function in patients diagnosed with localization-related (partial) epilepsy.
• To assess the safety and tolerability of sabeluzole treatment in this patient population.

Main Methods:

• A randomized, double-blind, placebo-controlled, parallel-group study was conducted.
• 33 patients with localization-related (partial) epilepsy were randomized to receive either sabeluzole (n=14) or placebo (n=19) for 12 weeks, following a 4-week titration phase.
• Memory function was assessed using multiple tests, with 'responders' defined as patients showing >1 SD improvement on at least three tests.

Main Results:

• A higher proportion of patients in the sabeluzole group were classified as 'responders' (64.3%) compared to the placebo group (36.8%).
• Sabeluzole treatment resulted in a statistically significant improvement on a verbal long-term memory test.
• These findings align with previous studies indicating sabeluzole's beneficial effects primarily on verbal long-term memory.

Conclusions:

• Sabeluzole exhibits a clinically relevant positive effect on memory function in patients with localization-related (partial) epilepsy.
• The observed improvements, particularly in verbal long-term memory, suggest a specific pharmacological action of sabeluzole.
• Further research may explore sabeluzole's potential as a therapeutic agent for cognitive deficits in epilepsy.