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Transdermal microparticle delivery by a supersonic-Helios gun system
1College of Pharmaceutical Sciences, Zhejang University, Zhejiang University, Hangzhou, China. jinyizju@hotmail.com
Die Pharmazie
|January 11, 2005
Summary
Helium gas flow and particle size influence indomethacin absorption via needle-free injection. Higher helium pressure increased drug delivery, bioavailability, and Cmax in rats.
Area of Science:
- Pharmacology
- Biomaterials Science
- Drug Delivery Systems
Background:
- Systemic drug absorption is crucial for therapeutic efficacy.
- Needle-free injection systems offer potential advantages over traditional methods.
- Optimizing particle characteristics and delivery parameters is key for efficient drug delivery.
Purpose of the Study:
- To investigate the impact of particle size and helium gas flow on indomethacin systemic absorption.
- To evaluate the efficacy of a needle-free injection system utilizing poly-L-lactic acid microspheres.
- To determine the relationship between helium pressure and drug delivery parameters.
Main Methods:
- Indomethacin-loaded poly-L-lactic acid microspheres were prepared using o/w solvent evaporation.
- Microspheres were delivered transdermally to hairless rats using a helium gas-powered Helios gun system.
- Systemic absorption, bioavailability, and Cmax of indomethacin were assessed at varying helium pressures.
Main Results:
- Indomethacin delivery to rat skin increased proportionally with helium gas pressure.
- Supersonic helium flow enhanced drug delivery.
- Bioavailability and maximum concentration (Cmax) were significantly dependent on helium pressure.
Conclusions:
- Helium gas-driven needle-free injection is an effective method for delivering drugs and microparticulate systems into skin tissues.
- Optimizing helium pressure is critical for controlling systemic absorption and pharmacokinetic profiles.
- This technology holds promise for transdermal drug delivery and therapeutic applications.