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Bull Exp Biol Med. 2001 Nov;132(5):1079-83.

Dimebon and tacrine inhibit neurotoxic action of beta-amyloid in culture and block L-type Ca(2+) channels.

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  • 1Department of Biological Research, Institute of Physiologically Active Substances, Russian Academy of Sciences, Chernogolovka, Moscow Region.


Dimebon, a Russian-made drug, inhibited toxic effects of beta -amyloid on cultured neurons. Excessive accumulation of beta-amyloid in the brain is characteristic of Alzheimer dementias. Antialzheimer preparations tacrine and dimebon improve survival of cerebellar granule cells during long-term incubation with Abeta25-35, the neurotoxic fragment of beta-amyloid. Both preparations can block potential-dependent Ca(2+) entry into neurons by about 20%, which is explained by their selective action on L-type Ca(2+) channels. It was assumed that the neuroprotective effect of dimebon and tacrine against Abeta25-35 partially depends on inhibition of potential-dependent Ca(2+) entry.

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