scholarly journals A New In Vitro Model to Evaluate Anti-Adhesive Effect against Fungal Nail Infections

2021 ◽  
Vol 11 (5) ◽  
pp. 1977
Author(s):  
Paola Perugini ◽  
Margherita Bonetti ◽  
Marta Guerini ◽  
Giorgio Musitelli ◽  
Pietro Grisoli
Keyword(s):  
Candida Albicans ◽  
Social Life ◽  
In Vitro Model ◽  
Trichophyton Rubrum ◽  
Negative Impact ◽  
Nail Plate ◽  
Negative Control ◽  
Pharmaceutical Product ◽  
Vitro Model

Nail fungal infection is often mistakenly considered a minor issue or a purely esthetic problem that is not worth solving. However, onychomycosis has been demonstrated to have a negative impact on a patient’s social life. Therefore, given the poor efficacy of various therapy types, there is strong interest in exploring new methods for evaluating antifungal treatments. As such, the aim of this work was to develop a new protocol, using bovine hoof membranes as a model of the human nail to evaluate the capability of a product claiming to prevent fungal adhesion, which is the first step of the infection. In this work, two specific and representative fungal strains, Trichophyton rubrum and Candida albicans, were used. In order to evaluate the possible protective activity of a product against fungal contamination of the nail plate, it was first necessary to test the affinity of the hoof membranes to be contaminated by the fungi. Then, a pharmaceutical product and a base coat were tested as a positive and negative control, respectively, by introducing the membranes (anti-fungal, basic or no treatment and single vs. multiple treatments) into the fungal suspensions for three different contact times (15 min, 5 h and 24 h). The results showed that the more significant antiadhesive effect (AE) was obtained against Trichophyton rubrum than against Candida albicans. Furthermore, taking into account the results obtained at all testing times, 5 h appeared to be the best time for testing the antiadhesive activity. The results obtained after three treatments with drugs and on washed membranes, in comparison to one single application of antifungal product (AP), demonstrated clearly that the drug was able to penetrate deeper into the membranes to exert itself, even after washing and also after only 15 min of contact. Thus, hoof membrane has been shown to be a valuable in vitro model for this kind of product assessment.

scholarly journals An In Vitro Model for Candida albicans–Streptococcus gordonii Biofilms on Titanium Surfaces

2018 ◽  
Vol 4 (2) ◽  
pp. 66 ◽  
Author(s):  
Daniel Montelongo-Jauregui ◽  
Anand Srinivasan ◽  
Anand Ramasubramanian ◽  
Jose Lopez-Ribot
Keyword(s):  
Candida Albicans ◽  
In Vitro Model ◽  
Streptococcus Gordonii ◽  
Titanium Surfaces ◽  
Vitro Model

Differential invasion of Candida albicans isolates in an in vitro model of oral candidosis

2004 ◽  
Vol 19 (5) ◽  
pp. 293-296 ◽  
Author(s):  
K. L. Bartie ◽  
D. W. Williams ◽  
M. J. Wilson ◽  
A. J. C. Potts ◽  
M. A. O. Lewis
Keyword(s):  
Candida Albicans ◽  
In Vitro Model ◽  
Oral Candidosis ◽  
Vitro Model

scholarly journals Fusarium and Candida albicans Biofilms on Soft Contact Lenses: Model Development, Influence of Lens Type, and Susceptibility to Lens Care Solutions

2007 ◽  
Vol 52 (1) ◽  
pp. 171-182 ◽  
Author(s):  
Yoshifumi Imamura ◽  
Jyotsna Chandra ◽  
Pranab K. Mukherjee ◽  
Ali Abdul Lattif ◽  
Loretta B. Szczotka-Flynn ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Contact Lens ◽  
Biofilm Formation ◽  
In Vitro Model ◽  
Contact Lenses ◽  
Fungal Keratitis ◽  
Soft Contact ◽  
Soft Contact Lenses ◽  
Vitro Model

ABSTRACT Fungal keratitis is commonly caused by Fusarium species and less commonly by Candida species. Recent outbreaks of Fusarium keratitis were associated with contact lens wear and with ReNu with MoistureLoc contact lens care solution, and biofilm formation on contact lens/lens cases was proposed to play a role in this outbreak. However, no in vitro model for contact lens-associated fungal biofilm has been developed. In this study, we developed and characterized in vitro models of biofilm formation on various soft contact lenses using three species of Fusarium and Candida albicans. The contact lenses tested were etafilcon A, galyfilcon A, lotrafilcon A, balafilcon A, alphafilcon A, and polymacon. Our results showed that clinical isolates of Fusarium and C. albicans formed biofilms on all types of lenses tested and that the biofilm architecture varied with the lens type. Moreover, differences in hyphal content and architecture were found between the biofilms formed by these fungi. We also found that two recently isolated keratitis-associated fusaria formed robust biofilms, while the reference ATCC 36031 strain (recommended by the International Organization for Standardization guidelines for testing of disinfectants) failed to form biofilm. Furthermore, using the developed in vitro biofilm model, we showed that phylogenetically diverse planktonic fusaria and Candida were susceptible to MoistureLoc and MultiPlus. However, Fusarium biofilms exhibited reduced susceptibility against these solutions in a species- and time-dependent manner. This in vitro model should provide a better understanding of the biology and pathogenesis of lens-related fungal keratitis.

scholarly journals An In Vitro Model for Oral Mixed Biofilms of Candida albicans and Streptococcus gordonii in Synthetic Saliva

2016 ◽  
Vol 7 ◽  
Author(s):  
Daniel Montelongo-Jauregui ◽  
Anand Srinivasan ◽  
Anand K. Ramasubramanian ◽  
Jose L. Lopez-Ribot
Keyword(s):  
Candida Albicans ◽  
In Vitro Model ◽  
Streptococcus Gordonii ◽  
Vitro Model

An In Vitro Model for the Study of the Macrophage Response Upon Trichophyton rubrum Challenge

2016 ◽  
Vol 182 (1-2) ◽  
pp. 241-250 ◽  
Author(s):  
Fabio Seiti Yamada Yoshikawa ◽  
Lucas Gonçalves Ferreira ◽  
Fernando Gonçalves de Almeida ◽  
Sandro Rogerio de Almeida
Keyword(s):  
In Vitro Model ◽  
Trichophyton Rubrum ◽  
Macrophage Response ◽  
Vitro Model

scholarly journals Transungual Delivery of Ciclopirox Is Increased 3–4-Fold by Mechanical Fenestration of Human Nail Plate in an In Vitro Model

Pharmaceutics ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 29 ◽  
Author(s):  
Damian Cordoba Díaz ◽  
Marta Losa Iglesias ◽  
Ricardo Becerro de Bengoa Vallejo ◽  
Manuel Cordoba Diaz
Keyword(s):  
In Vitro Model ◽  
Nail Plate ◽  
New Drugs ◽  
Treatment Regimens ◽  
Recent Clinical Study ◽  
Transungual Delivery ◽  
Vitro Model ◽  
Anti Fungal ◽  
Human Nails

Onychomycosis is a fungal infection of nails that is widespread and difficult to treat because of the impermeable nature of human nails. Topically applied anti-fungal agents cannot penetrate this structure, and treatment regimens often resort to systemic antifungals with concomitant side effects. One recent clinical study suggested that mechanical fenestration of the nail using an intelligent nail drill might be a possible solution to this problem. In this work, an in vitro model of the transungual delivery of antifungal agents is presented, which utilizes real nail tissue and an inline flow system. This system was deployed to measure transungual delivery of ciclopirox and determined that nail fenestration improved drug delivery by 3–4-fold after 42 days. This study bolsters the argument that nail fenestration should be accepted as a pretreatment for onychomycosis and offers a way of evaluating new drugs or formulations designed to combat this condition.

Sign in / Sign up

Export Citation Format

Share Document