Modulatory effects of the fruits of Tribulus terrestris L. on the function of atopic dermatitis-related calcium channels,Orai1 and TRPV3

Objective: To examine the effects of Tribulus terrestris L.(T. terrestris) extract on the modulation of calcium channels to evaluate its use in topical agents for treatment of atopic dermatitis.Methods: The 70% methanol extract of T. terrestris was prepared. Human HEK293 T cells with over-expressed calcium release-activated calcium channel protein 1(Orai1),transient receptor potential vanilloid 1, or transient receptor potential vanilloid 3(TRPV3)were treated with T. terrestris extract. Modulation of ion channels was measured using a conventional whole-cell patch-clamp technique.Results: T. terrestris extract(100 mg/m L) significantly inhibited Orai1 activity in Orai1-stromal interaction molecule 1 co-overexpressed HEK293 T cells. In addition, T. terrestris extract significantly increased the TRPV3 activity compared with 2-Aminoethyl diphenylborinate(100 mmol/L), which induces the full activation of TRPV3.Conclusions: Our results suggest that T. terrestris extract may have a therapeutic potential for recovery of abnormal skin barrier pathologies in atopic dermatitis through modulating the activities of calcium ion channels, Orai1 and TRPV3. This is the first study to report the modulatory effect of a medicinal plant on the function of ion channels in skin barrier.

INHIBITORY EFFECT OF THE CONSTITUENTS FROM THE RHIZOMES OF CYPERUS ROTUNDUS ON TRPV1 ION CHANNEL

Cyperus rotundus(Cyperaceae)is used as an analgesic and sedative in oriental medicine,and has been reported to exhibit anti-nociceptive and anti-inflammatory effects.On the other hand,transient receptor potential vanilloid channel 1(TRPV1),the so-called capsaicin receptor,is a nonselective cation channel that senses various noxious chemical and thermal stimuli.However,it has recently