1. Uncaria Rhynchophylla and hirsuteine as TRPV1 agonists inducing channel desensitization.
- Author
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Ha T, Kang B, Kim MS, Chu JW, Kim K, Yoon W, Kim SH, Kang T, Kim MS, Kim C, Cha JY, Oh U, Han K, Choi CW, and Hong GS
- Subjects
- Humans, HEK293 Cells, Animals, Sensory Receptor Cells drug effects, Sensory Receptor Cells metabolism, Capsaicin pharmacology, Calcium metabolism, TRPV Cation Channels agonists, TRPV Cation Channels metabolism, Plant Extracts pharmacology, Uncaria chemistry
- Abstract
Ethnopharmacological Relevance: Uncaria rhynchophylla (UR) is recognized for its therapeutic applications in treating hypertension and inflammation. However, the specific molecular mechanisms how UR and its bioactive constituents modulate inflammatory pathways remain unknown. This study investigates the effects of UR extract and its constituent, hirsuteine (HST), on TRPV1 channel modulation which is related to hypertension and inflammation., Materials and Methods: Electrophysiological recordings and calcium imaging experiments were conducted to assess TRPV1 activation by UR extract and HST in HEK293T cells and sensory neurons., Results: UR extract and HST activated TRPV1 in HEK293T cells, with repeated applications causing channel desensitization. HST application on TRPV1-positive sensory neurons significantly reduced electrical activity compared to capsaicin., Conclusion: This study demonstrated UR extract and HST are a novel TRPV1 agonists inducing channel desensitization and a potent agent for treatment of TRPV1 dependent pain relief., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 KIST. Published by Elsevier B.V. All rights reserved.)
- Published
- 2025
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