Clinical isolates of Trichophyton rubrum are completely inhibited by photochemical treatment with a γ-cyclodextrin formulation of curcuminoids.

Abstract:

INTRODUCTION:It was shown previously that dermatophytes can markedly be inhibited by a photochemical treatment with curcumin. This kind of photo-inactivation needs to be improved, however, because curcumin is poorly water-soluble. Therefore, a new water-soluble γ-cyclodextrin formulation of curcuminoids was tested for its photochemical inactivation of Trichophyton (T.) rubrum. MATERIALS AND METHODS:Conidia were harvested from 6 typical strains of T rubrum and used to inoculate wells of microtiter plates. These wells were also filled with a γ-cyclodextrin curcuminoid formulation with 0.1% DMSO and Sabouraud broth. The assays were then irradiated with visible light (wavelength 420 nm, 45 J/cm2 ). After 24 hours, curcuminoid was added once more, and irradiation was repeated. Fungal growth was monitored photometrically for 8 days and compared with controls. RESULTS:Growth of all 6 T rubrum strains was completely inhibited by the photochemical treatment with the γ-cyclodextrin formulation of curcuminoids. The same curcuminoid formulation applied without irradiation had only a minor inhibitory effect. DISCUSSION:Photo-inactivation of dermatophytes with a γ-cyclodextrin formulation of curcuminoids plus visible light is a very promising procedure with potential for a new treatment of patients with superficial tinea.

journal_name

Mycoses

journal_title

Mycoses

authors

Brasch J,Beck-Jendroschek V,Walther G,Rubbel D

doi

10.1111/myc.13051

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

369-375

issue

4

eissn

0933-7407

issn

1439-0507

journal_volume

63

pub_type

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