Asymmetric total synthesis and identification of tetrahydroprotoberberine derivatives as new antipsychotic agents possessing a dopamine D(1), D(2) and serotonin 5-HT(1A) multi-action profile

Bioorg Med Chem. 2013 Feb 15;21(4):856-68. doi: 10.1016/j.bmc.2012.12.016. Epub 2012 Dec 21.

Abstract

An effective and rapid method for the microwave-assisted preparation of the key intermediate for the total synthesis of tetrahydroprotoberberines (THPBs) including l-stepholidine (l-SPD) was developed. Thirty-one THPB derivatives with diverse substituents on A and D ring were synthesized, and their binding affinity to dopamine D(1), D(2) and serotonin 5-HT(1A) and 5-HT(2A) receptors were determined. Compounds 18k and 18m were identified as partial agonists at the D(1) receptor with K(i) values of 50 and 6.3nM, while both compounds act as D(2) receptor antagonists (K(i)=305 and 145nM, respectively) and 5-HT(1A) receptor full agonists (K(i)=149 and 908nM, respectively). These two THPBs compounds exerted antipsychotic actions in animal models. Further electrophysiological studies employing single-unit recording in intact animals demonstrated that 18k-excited dopaminergic (DA) neurons are associated with its 5-HT(1A) receptor agonistic activity. These results suggest that these two compounds targeted to multiple neurotransmitter receptors may present novel lead drugs with new pharmacological profiles for the treatment of schizophrenia.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antipsychotic Agents / chemical synthesis*
  • Antipsychotic Agents / pharmacology
  • Antipsychotic Agents / therapeutic use
  • Berberine / analogs & derivatives
  • Berberine / chemistry
  • Berberine Alkaloids / chemical synthesis
  • Berberine Alkaloids / chemistry*
  • CHO Cells
  • Cricetinae
  • Cricetulus
  • Dopamine D2 Receptor Antagonists*
  • HEK293 Cells
  • Humans
  • Microwaves
  • Motor Activity / drug effects
  • Protein Binding
  • Rats
  • Receptor, Serotonin, 5-HT1A / chemistry*
  • Receptor, Serotonin, 5-HT1A / metabolism
  • Receptor, Serotonin, 5-HT2A / chemistry
  • Receptor, Serotonin, 5-HT2A / metabolism
  • Receptors, Dopamine D1 / antagonists & inhibitors*
  • Receptors, Dopamine D1 / metabolism
  • Receptors, Dopamine D2 / metabolism
  • Schizophrenia / chemically induced
  • Schizophrenia / drug therapy
  • Serotonin 5-HT1 Receptor Agonists / chemistry
  • Serotonin 5-HT1 Receptor Agonists / pharmacology
  • Serotonin 5-HT1 Receptor Agonists / therapeutic use
  • Structure-Activity Relationship

Substances

  • Antipsychotic Agents
  • Berberine Alkaloids
  • Dopamine D2 Receptor Antagonists
  • Receptor, Serotonin, 5-HT2A
  • Receptors, Dopamine D1
  • Receptors, Dopamine D2
  • Serotonin 5-HT1 Receptor Agonists
  • Berberine
  • stepholidine
  • Receptor, Serotonin, 5-HT1A
  • protoberberine