Zusammenfassung
Nanopartikel sind aufgrund ihrer geringen Größe und der Vielseitigkeit der verwendeten Materialien hervorragend geeignet, um als Drug-Delivery-Systeme eingesetzt zu werden. Sie sind in der Lage, biologische Barrieren zu durchdringen, Medikamente zielgerichtet an ihren Wirkort zu bringen und dort verzögert freizusetzen. In der Onkologie schon lange im Einsatz, wird das Potenzial von Nanopartikeln zum Medikamententransport im letzten Jahrzehnt auch vermehrt in der Ophthalmologie erforscht. Damit ließen sich Hindernisse wie die schlechte Wirkstoffaufnahme bei der Gabe von Augentropfen und das Nebenwirkungsprofil bei der Anwendung von invasiven Methoden wie dem Einsetzen von Medikamentendepots in Form von Implantaten überwinden. Zu den wichtigsten untersuchten Strukturen zählen polymere Nanopartikel, Mizellen, Liposomen, „solid lipid nanoparticles“, Dendrimere und Cyclodextrine. Zusätzlich zur Zusammensetzung der eigentlichen Nanopartikel selbst können ihre Effektivität und Stabilität durch Beschichtungen verbessert werden. Die größten Herausforderungen liegen v. a. in der Langzeitstabilität, der Standardisierung bei der Herstellung und der Toxizität. Die bisherigen präklinischen und zum Teil auch klinischen Ergebnisse lassen darauf hoffen, dass ein baldiger Einsatz von Nanopartikeln zur Optimierung der okulären Wirkstoffaufnahme möglich ist.
Abstract
Nanoparticles are perfectly suited as drug delivery systems due to their size and the diversity of materials used. They are able to penetrate biological barriers, can directly deliver drugs to the target site and provide a sustained release profile. Having long been established in oncology, in the last decade research has started to take a closer look at the potential of nanoparticles for ocular drug delivery. Obstacles, such as poor delivery of drugs via eye drops and the side effects of invasive methods, such as placing implants as drug depots could be overcome. Among the most relevant investigated structures are polymeric nanoparticles, micelles, liposomes, solid lipid nanoparticles, dendrimers and cyclodextrins. Besides the composition of the nanoparticle itself, its efficacy and stability can be optimized through coatings; however, long-term stability, standardization of production and toxicity remain the major challenges. The preclinical and partly clinical results obtained so far will hopefully give impulse to the idea of applying nanoparticles for optimized ocular drug delivery in the near future.
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M.S. Spitzer und S. Schnichels sind Miterfinder der unter [33] genannten Technologie. M. Löscher, J. Hurst und L. Strudel geben an, dass kein Interessenkonflikt besteht.
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Löscher, M., Hurst, J., Strudel, L. et al. Nanopartikel als Drug-Delivery-Systeme für die Ophthalmologie. Ophthalmologe 115, 184–189 (2018). https://doi.org/10.1007/s00347-017-0596-6
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DOI: https://doi.org/10.1007/s00347-017-0596-6