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Medical journals
Targeting and Controlled Release of Drugs Using Magnetoliposomes
CIELENÝ PRENOS A KONTROLOVATEĽNÉ UVOĽŇOVANIE LIEČIV POMOCOU MAGNETOLIPOZÓMOV
V práci sme sa zaoberali vytvorením takého systému prenosu liečiv, ktorý by umožňoval sústrediť liečivo v danom postihnutom mieste a uvoľňovať ho programovateľným spôsobom, pričom by bol systém stabilný a odolný voči rozrušeniu. Na tento účel sme navrhli použiť magnetolipozómy (lipozómy, do lipidickej dvojvrstvy ktorých sú zabudované feromagnetické častice), ktoré sú citlivé na magnetické pole, a to umožňuje ich nasmerovanie na konkrétne miesto v organizme. Vďaka kovovým časticiam, ktoré preferenčne absorbujú mikrovlné žiarenie, môže byť ľahko zvýšená ich teplota, čo vedie k ich zvýšenej permeabilite, a tým k uvoľneniu liečiva, ktorým boli lipozómy naplnené. Vplyv magnetického poľa sme analyzovali teoreticky. Experimentálne sme v práci pomo - cou fluorescenčnej spektrofotometrie overili kvantitatívny vzťah medzi dávkou mikrovlného žiare - nia a rozsahom uvoľnenia liečiva.
Klíčová slova:
cielený prenos liečiv – magnetolipozómy – mikrovlné žiarenie – magnetické pole
Authors: M. Babincová
Authors‘ workplace: Katedra biofyziky a chemickej fyziky Matematicko-fyzikálnej fakulty Univerzity Komenského, Bratislava
Published in: Čes. slov. Farm., 1999; , 27-29
Category:
Overview
The present paper deals with a stable drug delivery system which allows to concentrate the drug in a desired site and its programmable release. For these purposes the present authors have suggested to use magnetoliposomes (liposomes with enwrapped magnetite particles in their bilayers) which are magnetosensitive and may be maneuvered to the given site in the organism. Due to the magnetite particles, which are strong microwave absorbers, magnetoliposomes can be heated to higher temperatures which may subsequently lead to a leakage of encapsulated drug. Influence of static magnetic field on liposomes in the blood-stream was analyzed theoretically. Fluorescence spectro - photometry was used to determine the relationship between doses of microwave radiation and the extent of drug release.
Key words:
controlled drug delivery – magnetoliposomes – microwave radiation – magnetic field
Labels
Pharmacy Clinical pharmacology
Article was published inCzech and Slovak Pharmacy
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