Structure - Activity studies leading to ( - )1-(Benzofuran-2-yl)-2-propylaminopentane, (( - )BPAP), a highly potent, selective enhancer of the impulse propagation mediated release of catecholamines and serotonin in the brain

Fumio Yoneda, Toshiaki Moto, Masatoshi Sakae, Hironori Ohde, Berta Knoll, Ildikó Miklya, Joseph Knoll

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Abstract

The catecholaminergic and serotoninergic neurons in the brain change their performance according to the physiological need via a catecholaminergic/serotoninergic activity enhancer (CAE/SAE) mechanism. Phenylethylamine (PEA), tyramine and tryptamine are the presently known endogenous CAE/SAE substances which enhance the impulse propagation mediated release of catecholamines and serotonin in the brain. A PEA derivative, (-)deprenyl (selegiline), known as a selective inhibitor of MAO-B, is for the time being the only CAE/SAE substance in clinical use. Aiming to develop a selective CAE/SAE substance much more potent than (-)deprenyl, a series of new 1-aryl-2-alkylaminoalkanes, structurally unrelated to PEA and the amphetamines, was designed and prepared. Among them, (-)1-(benzofuran-2-yl)-2-propylaminopentane ((-)BPAP) was selected as a promising candidate substance for further studies. (-)BPAP significantly enhanced in rats the impulse propagation mediated release of catecholamines and serotonin in the brain 30 min after acute injection of 0.36 nmol/kg sc. In the shuttle box, (-)BPAP was in rats about 130 times more potent than (-)deprenyl in antagonizing tetrabenazine induced inhibition of performance. (±)BPAP protected cultured hippocampal neurons from the neurotoxic effect of β-amyloid in 10-14-10-15 M concentration.

Original languageEnglish
Pages (from-to)1197-1212
Number of pages16
JournalBioorganic and Medicinal Chemistry
Volume9
Issue number5
DOIs
Publication statusPublished - May 1 2001

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ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmaceutical Science
  • Drug Discovery
  • Clinical Biochemistry
  • Organic Chemistry

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