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Influence of iontophoresis and ultrasound on the release of drugs from dendrimeric liquid crystals

Grant number: 17/05930-7
Support Opportunities:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2017
Effective date (End): April 09, 2019
Field of knowledge:Health Sciences - Pharmacy - Pharmaceutical Technology
Principal Investigator:Renata Fonseca Vianna Lopez
Grantee:Raquel Petrilli
Host Institution: Faculdade de Ciências Farmacêuticas de Ribeirão Preto (FCFRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated research grant:14/22451-7 - Sustained drug delivery systems targeting the epithelial tissue, AP.TEM


Topical treatment has been studied as a promising alternative for skin cancer therapy. Our research group has evaluated ways to increase the skin penetration of chemotherapeutic drugs so that they are able to reach deeper layers of the skin. It is known that techniques such as iontophoresis and ultrasound promote the skin penetration of both small and macromolecules. However, both techniques involve the formation of regions of Located Transport (LTR), which restrict the effectiveness of these techniques. In recent studies we observed that iontophoresis of dispersions containing dendrimeric nanoparticles as carriers of drugs was able to increase the topic transport into the skin. Some studies reported in the literature have used dendrimers for the development of thermotropic ionic liquid crystals. Thermotropic liquid crystals are intermediate phases between the solid and liquid phases of a substance, whose degree of molecular organization responds to changes in temperature and can respond to application of electric current and ultrasound, changing characteristics such as viscosity, conductivity and molecular relaxation. These characteristics could be used to benefit the permeation of drugs associated with iontophoresis and ultrasound, but have never been studied for this purpose. Thus, this project proposes to develop liquid crystal dendrimer formulations and evaluate their influence on the efficiency of iontophoresis and ultrasound as cutaneous absorption promoters of a monoclonal antibody, cetuximab. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CAMPOS, PATRICIA MAZUREKI; PETRILLI, RAQUEL; LOPEZ, V, RENATA F.. The prominence of the dosage form design to treat ocular diseases. International Journal of Pharmaceutics, v. 586, . (17/05930-7, 14/50928-2, 14/22451-7)
PETRILLI, RAQUEL; VIANNA LOPEZ, RENATA FONSECA. Physical methods for topical skin drug delivery: concepts and applications. Brazilian Journal of Pharmaceutical Sciences, v. 54, n. SI, . (17/05930-7, 14/22451-7)

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