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  2. Glycogen synthase kinase-3 (GSK-3) inhibitory activity and structure-activity relationship (SAR) studies of the manzamine alkaloids. Potential for Alzheimer's disease

Glycogen synthase kinase-3 (GSK-3) inhibitory activity and structure-activity relationship (SAR) studies of the manzamine alkaloids. Potential for Alzheimer's disease

  • J Nat Prod. 2007 Sep;70(9):1397-405. doi: 10.1021/np060092r.
Mark Hamann 1 Diana Alonso Ester Martín-Aparicio Ana Fuertes M José Pérez-Puerto Ana Castro Susana Morales María Luisa Navarro María Del Monte-Millán Miguel Medina Hari Pennaka Akula Balaiah Jiangnan Peng Jennifer Cook Subagus Wahyuono Ana Martínez
Affiliations

Affiliation

  • 1 Department of Pharmacognosy, Pharacology, Chemistry and Biochemistry, School of Pharmacy, University of Mississippi, Mississippi 38677, USA.
Abstract

Manzamine A and related derivatives isolated from a common Indonesian Sponge, Acanthostrongylophora, have been identified as a new class of GSK-3beta inhibitors. The semisynthesis of new analogues and the first structure-activity relationship studies with GSK-3beta are also reported. Moreover, manzamine A proved to be effective in decreasing tau hyperphosphorylation in human neuroblastoma cell lines, a demonstration of its ability to enter cells and interfere with tau pathology. Inhibition studies of manzamine A against a selected panel of five different kinases related to GSK-3beta, specifically CDK-1, PKA, CDK-5, MAPK, and GSK-3alpha, show the specific inhibition of manzamine A on GSK-3beta and CDK-5, the two kinases involved in tau pathological hyperphosphorylation. These results suggest that manzamine A constitutes a promising scaffold from which more potent and selective GSK-3 inhibitors could be designed as potential therapeutic agents for Alzheimer's disease.

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