Pro-drugs as drug delivery systems XXIII. Improved dermal delivery of 5-fluorouracil through human skin via N-acyloxymethyl pro-drug derivatives

1982 ◽  
Vol 12 (2-3) ◽  
pp. 153-162 ◽  
Author(s):  
Birgitte Møllgaard ◽  
Annie Hoelgaard ◽  
Hans Bundgaard
2019 ◽  
Vol 563 ◽  
pp. 1-8 ◽  
Author(s):  
Martha L. Vázquez-González ◽  
Adrià Botet-Carreras ◽  
Òscar Domènech ◽  
M. Teresa Montero ◽  
Jordi H. Borrell

2021 ◽  
Vol 10 ◽  
Author(s):  
Ravi Shankar ◽  
Prabhat Kumar Upadhyay ◽  
Manish Kumar

Background: Portage of therapeutic agents directly to the skin (cutaneous/dermal delivery) is the preferable approach in mitigating and curing a variety of skin manifestations, including itching, eczema, acne, psoriasis keratinization, and skin cancer. Dermal delivery reduces side effects associated with systemic therapy and allows maximum utilization of the available doses. Invasomes are the next generation of liposomes with greater flexibility, elasticity, and permeability through the skin than liposomes and ethosomes. Objective: This review article highlights various aspects of invasomes, including the structure and composition of invasomes, methods of preparation of invasomes, the mechanism involved in better penetration through the skin, key parameters to be considered for effective permeation, therapeutic applications of invasomes as novel drug delivery systems, and future development and challenges. Methods: The authors have reviewed various primary and secondary sources, including PUBMED, SCIENCE DIRECT, INFORMA, and patents.com, to collect information on various aspects of invasomes. Results and Conclusion: Invasomes are novel vesicular drug delivery systems that have been used for dermal delivery of drugs for various therapeutic applications. These novel carriers have great ability, and their properties can be highly modulated by varying their composition and concentration of terpenes. Based on all the research reports gathered, it is well proven that these systems have a much higher potential for delivering drugs for skin manifestations and could expand the opportunities for treating various dermatological issues, increasing day by day.


Author(s):  
G.E. Visscher ◽  
R. L. Robison ◽  
G. J. Argentieri

The use of various bioerodable polymers as drug delivery systems has gained considerable interest in recent years. Among some of the shapes used as delivery systems are films, rods and microcapsules. The work presented here will deal with the techniques we have utilized for the analysis of the tissue reaction to and actual biodegradation of injectable microcapsules. This work has utilized light microscopic (LM), transmission (TEM) and scanning (SEM) electron microscopic techniques. The design of our studies has utilized methodology that would; 1. best characterize the actual degradation process without artifacts introduced by fixation procedures and 2. allow for reproducible results.In our studies, the gastrocnemius muscle of the rat was chosen as the injection site. Prior to the injection of microcapsules the skin above the sites was shaved and tattooed for later recognition and recovery. 1.0 cc syringes were loaded with the desired quantity of microcapsules and the vehicle (0.5% hydroxypropylmethycellulose) drawn up. The syringes were agitated to suspend the microcapsules in the injection vehicle.


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