New 1,2,3,4-tetrahydroisoquinoline derivatives as modulators of proteolytic cleavage of amyloid precursor proteins
2008
Abstract A type of new 1,2,3,4-tetrahydroisoquinoline derivatives was synthesized via concise procedure from commercially available tetrahydroisoquinoline. These derivatives were delicately designed to possess propargyl-related pharmacophores simulated with a monoamine oxidase inhibitor rasagiline. We investigated the effect of these synthetic tetrahydroisoquinoline derivatives on the regulation of proteolytic processing of amyloid precursor protein (APP) by an ERK-dependent signaling pathway. Additionally, these compounds were also evaluated on the prevention of the proteolytic processing of C99 as γ-secretase inhibitors by using a highly efficient cell-based reporter gene assay for γ-secretase. The results suggested that certain compounds might be explored to possess both sAPPα-releasing stimulation and γ-secretase inhibitory potency, which may reflect the synergetic potential of neuroprotective activities for the treatment of Alzheimer’s disease as they possessed both ERK activation and inhibition of amyloidogenic Aβ release.
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