Related Experiment Video

Updated: Aug 30, 2025

Identification of Hemolytic and Phospholipase Activity in Crude Extracts from Sea Anemones by Straightforward Bioassays
12:12

Identification of Hemolytic and Phospholipase Activity in Crude Extracts from Sea Anemones by Straightforward Bioassays

Published on: March 29, 2022

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Anxiolytic Effect of Peptides from Sea Anemone Heteractis crispa, Modulators of TRPV1 and ASIC Channels

O V Sintsova1, R S Kalina1, I N Gladkikh1

  • 1Elyakov Pacific Institute of Bioorganic Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia.

Doklady. Biochemistry and Biophysics
|August 29, 2022
PubMed

Insights

Sea anemone peptides show anxiolytic potential. HCRG21 effectively reduces anxiety and boosts activity, outperforming a reference drug, while Hcr 1b-2 shows a weaker effect.

Area of Science:

  • Neuroscience
  • Pharmacology

Background:

  • Transient receptor potential vanilloid (TRPV) and acid-sensing (ASIC) ion channels are implicated in anxiety disorders.
  • Ligands targeting these channels represent potential anxiolytic agents.

Purpose of the Study:

  • To evaluate the anxiolytic efficacy of two sea anemone peptides, Hcr 1b-2 (ASIC1a ligand) and HCRG21 (TRPV1 ligand).

Main Methods:

  • Open field and elevated plus maze tests were used to assess anxiety levels and animal activity.
  • Pharmacodynamic studies evaluated the duration and effectiveness of the anxiolytic effect.

Main Results:

  • HCRG21 demonstrated significant anxiolytic effects and stimulated activity across doses of 0.01-1 mg/kg.
  • Hcr 1b-2 exhibited a weak anxiolytic effect only at 0.1 mg/kg.
  • HCRG21's anxiolytic effect lasted for 2 hours and was more potent than the reference drug.

Conclusions:

  • The sea anemone peptide HCRG21 is a promising anxiolytic agent targeting TRPV1 channels.
  • Further research into HCRG21 could lead to novel treatments for anxiety disorders.
Keywords:
CNSTRPV1 ion channelacid-sensing ion channelsanalgesic peptidesantidepressantsanxiety disordersanxiolytic effect

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