Related Experiment Video
Updated: Oct 15, 2025
Cheek Injection Model for Simultaneous Measurement of Pain and Itch-related Behaviors
Published on: September 27, 2019
Oxymatrine screened from Sophora flavescens by cell membrane immobilized chromatography relieves
Zhe Zhang1, Jianhao Pan1, Tao Zhu1
1Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, China.
Objectives:
This study aimed to discover the active compounds of Sophora flavescens Ait. (SF), the anti-itch effects and underlying mechanisms of oxymatrine (OMT), one of the bioactive compounds from SF.
Methods:
Dorsal root ganglion cell membrane immobilized chromatography was used to screen potential anti-pruritic active compounds from SF. The scratching behaviour was analysed to systematically study the anti-pruritic effects of OMT in chloroquine- (CQ), peptide Ser-Leu-Ile-Gly-Arg-Leu- (SLIGRL), histamine- (HIS) and allyl-isothiocyanate-(AITC)-induced itch mice models. Real-time quantitative PCR, in-vivo study and molecular docking were employed to explore the underlying mechanisms.
Key Findings:
All in all, 21 compounds of SF were identified and 5 potential bioactive compounds were discovered. OMT significantly reduced scratching bouts in two HIS-independent itch models induced by CQ and SLIGRL but was not effective in the HIS-induced itch model. OMT reduced scratching bouts in a dose-dependent manner and decreased the messenger RNA (mRNA) expression of transient receptor potential ankyrin 1 (TRPA1) channel in two HIS-independent itch models; in addition, OMT reduced the wipes and scratching bouts induced by AITC.
Conclusions:
This study discovered five potential anti-pruritic compounds including OMT in the SF extract, and OMT has strong anti-pruritic effects in HIS-independent itch via TRPA1 channel.
More Related Videos
08:25An Ex vivo Mast Cell Degranulation Assay using Crude Peritoneal Exudate Cells and Natural Antigen Stimulation
Published on: April 27, 2021
08:31Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions
Published on: December 1, 2020
Related Concept Videos
01:25Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
01:24Cholinergic Antagonists: Pharmacokinetics
01:26Cholinergic Antagonists: Therapeutic Uses
Respiratory Tract: Ipratropium, aclidinium, and tiotropium treat asthma, chronic bronchitis, and chronic obstructive pulmonary disease (COPD). They protect against bronchoconstriction caused by irritants like cigarette smoke, sulfur dioxide, and ozone. They also help reduce nasopharyngeal...
01:28Cholinergic Antagonists: Pharmacological Actions
Gastrointestinal Effects: Antimuscarinics reduce gut contractions, increase gastric emptying, and slow intestinal transit. They partly inhibit gastric acid secretion...
01:24Antiasthma Drugs: Methylxanthines
Theophylline is thought to inhibit phosphodiesterase enzymes, increasing intracellular levels of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). This rise in cAMP and cGMP concentrations stimulates cardiac function,...
01:28Adrenergic Agonists: Mixed-Action Agents
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...