Characterization of a Family of Scorpion Toxins Modulating Ca2+-Activated Cl- Current in Vascular Myocytes
Language
EN
Article de revue
This item was published in
Toxins. 2022-11-10, vol. 14, n° 11
English Abstract
The pharmacology of calcium-activated chloride current is not well developed. Peptides from scorpion venom present potent pharmacological actions on ionic conductance used to characterize the function of channels but can ...Read more >
The pharmacology of calcium-activated chloride current is not well developed. Peptides from scorpion venom present potent pharmacological actions on ionic conductance used to characterize the function of channels but can also be helpful to develop organic pharmacological tools. Using electrophysiological recording coupled with calcium measurement, we tested the potent effect of peptides extracted from venom on the calcium-activated chloride current expressed in smooth muscle cells freshly dissociated from rat portal veins. We identified one peptide which selectively inhibited the chloride conductance without effects on either calcium signaling or calcium and potassium currents expressed in this cell type. The synthetic peptide had the same affinity, but the chemical modification of the amino acid sequence altered the efficiency to inhibit the calcium-activated chloride conductance.Read less <
English Keywords
Rats
Animals
Scorpion Venoms
Chloride Channels
Calcium
Chlorides
Myocytes
Smooth Muscle
Peptides