ArticlePharmaceutical research2012
Assessment of iontophoretic and passive ungual penetration by laser scanning confocal microscopy.
Article in Pharmaceutical research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
3 citing papers in PubMed, 14 citations in OpenAlex.
- Penetration Profiles of Four Topical Antifungals in Mycotic Human Toenails Quantified by Matrix-Assisted Laser Desorption Ionization-Fourier Transform Ion Cyclotron Resonance Imaging.Infectious diseases and therapy · 2024Article
- Iontophoresis to Overcome the Challenge of Nail Permeation: Considerations and Optimizations for Successful Ungual Drug Delivery.The AAPS journal · 2021Review
- Mechanism of human nail poration by high-repetition-rate, femtosecond laser ablation.Drug delivery and translational research · 2019Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo estimate the in vitro ungual penetration depth of sodium fluorescein and nile blue chloride by laser scanning confocal microscopy.
methodsThe depth, uniformity and pathways of penetration of both markers into human nail during passive and iontophoretic experiments were investigated. The penetration of sodium fluorescein into the dorsal, ventral and intermediate layers of the nail was also studied. Transversal images were used to estimate directly the relative penetration of the markers with respect to the complete thickness of the nail. "Exposed layer" images allowed estimating the depth of penetration by taking xy-plans, starting by the exposed layer, and following the z axis into the nail.
resultsThe fluorescent markers penetrated 7-12% of the nail thickness. Iontophoresis increased penetration of both markers compared to passive diffusion. However, ungual penetration was not modified by the intensity of current applied. Penetration into the dorsal, ventral, and intermediate nail layers was similar. The method developed allowed inter- and intra- nail variability to be accounted for.
conclusionsIontophoresis enhanced moderately the penetration of the two markers into the nail plate as compared to passive diffusion. The confocal images suggested the transcellular pathway to be predominant during both passive and iontophoretic experiments.
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Registered trials
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