International journal of pharmaceutics, 294(1-2), 149-155 (2005-04-09)
Phloretin and 6-ketocholestanol are penetration enhancers for percutaneous delivery of certain topically applied drugs. In the present study some physicochemical experiments have been performed to elucidate the mechanism of action of phloretin and 6-ketocholestanol. The penetration enhancing effect of phloretin
International journal of pharmaceutics, 255(1-2), 109-116 (2003-04-04)
In this study, the effect of lipophilic counter-ions on the permeation of 5-aminolevulinic acid (ALA) in combination with skin impregnation by phloretin and 6-ketocholestanol was evaluated. Standard in vitro permeation experiments with porcine skin were performed analysing the ALA content
Biochimica et biophysica acta, 1712(2), 128-136 (2005-06-01)
The dipole potential (Psi(d)) constitutes a large and functionally important part of the electrostatic potential of cell plasma membranes. However, its direct measurement is not possible. Herein, new 3-hydroxyflavone fluorescent probes were developed that respond strongly to Psi(d) changes by
Journal of pharmaceutical sciences, 92(5), 1018-1027 (2003-04-25)
In the present work, we report the possibility of modifying the electrostatic properties of the skin by treating human epidermis with compounds whose structures possess a large molecular dipole moment. Data are presented showing that such a modification can be
Biochimica et biophysica acta, 1768(1), 107-114 (2006-08-15)
We are interested in developing fluorescence methods for quantifying lateral variations in the dipole potential across cell surfaces. Previous work in this laboratory showed that the ratio of fluorescence intensities of the voltage-sensitive dye di-8-ANEPPS using excitation wavelengths at 420
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