Design, Synthesis and Biological Evaluation of Two Opioid Agonist and Cav 2.2 Blocker Multitarget Ligands

Chem Biol Drug Des. 2015 Aug;86(2):156-62. doi: 10.1111/cbdd.12479. Epub 2014 Dec 8.

Abstract

N-type voltage-dependent Ca(2+) channels (CaV 2.2) are located at nerve endings in the central and peripheral nervous systems and are strongly associated with the pathological processes of cerebral ischaemia and neuropathic pain. CaV 2.2 blockers such as the ω-conotoxin MVIIA (Prialt) are analgesic and have opioid-sparing effects. With the aim to develop new multitarget analgesic compounds, we designed the first ω-conotoxin/opioid peptidomimetics based on the enkephalin-like sequence Tyr-D-Ala-Gly-Phe (for the opioid portion) and two fragments derived from the loop-2 pharmacophore of ω-conotoxin MVIIA. Antinociceptive activity evaluated in vitro and in vivo revealed differential affinity for CaV 2.2 and opioid receptors and no significant synergistic activity.

Keywords: CaV2.2; analgesic; conotoxin; multitarget ligands; opioid; pain.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Analgesics, Opioid / chemical synthesis*
  • Analgesics, Opioid / pharmacology*
  • Animals
  • Calcium Channel Blockers / chemical synthesis*
  • Calcium Channel Blockers / pharmacology*
  • Calcium Channels / metabolism
  • Calcium Channels, N-Type / metabolism
  • Conotoxins / chemistry
  • Drug Design
  • Ligands
  • Mice
  • Oligopeptides / chemistry*
  • Oligopeptides / pharmacology*
  • Pain / drug therapy
  • omega-Conotoxins / chemistry
  • omega-Conotoxins / pharmacology

Substances

  • Analgesics, Opioid
  • Calcium Channel Blockers
  • Calcium Channels
  • Calcium Channels, N-Type
  • Conotoxins
  • Ligands
  • Oligopeptides
  • omega-Conotoxins
  • tyrosyl-alanyl-glycyl-phenylalanine