Echinacoside Ameliorates UVB-Induced Skin Damage Through Selective Inhibition of the Cutaneous TRPV3 Channel
Excessive exposure to ultraviolet B (UVB) radiation can lead to skin damage, such as erythema and swelling. Echinacoside is a key effective ingredient of medicinal plant <i>Cistanche deserticola</i> commonly used for therapies and treatments for anti-aging and irradiation-related skin di...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
|
| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/9/2026 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Excessive exposure to ultraviolet B (UVB) radiation can lead to skin damage, such as erythema and swelling. Echinacoside is a key effective ingredient of medicinal plant <i>Cistanche deserticola</i> commonly used for therapies and treatments for anti-aging and irradiation-related skin diseases. However, the molecular mechanism underlying the action of echinacoside remains unclear. Here, we report that echinacoside ameliorates UVB-induced skin damage by directly acting on the Ca<sup>2+</sup>-permeable and thermosensitive transient receptor potential vanilloid 3 (TRPV3) channel. Topical application of echinacoside efficaciously suppresses skin lesions induced by UVB radiation in wild-type mice but has no additional benefit in <i>Trpv3</i> knockout mice. In whole-cell patch clamp recordings, echinacoside selectively inhibits TRPV3 channel currents induced by 2-aminoethoxydiphenyl borate in a concentration-dependent manner with an IC<sub>50</sub> value of 21.94 ± 1.28 μM. The single-channel patch clamp results show that echinacoside significantly reduces the open probability and open frequency without significantly altering TRPV3 channel unitary conductance. Molecular docking and site-specific mutagenesis indicate that residue T636 on the p-loop and residue T665 on the S6 segment of TRPV3 are critical for echinacoside binding to TRPV3. Taken together, our findings provide a molecular basis for further studies as use of natural echinacoside in irradiation-related skin care therapy, thus establishing a significant role of the TRPV3 channel in acute skin injury. |
|---|---|
| ISSN: | 1420-3049 |