AI Article Synopsis
- The study focuses on creating injectable polymeric paste (IPP) formulations designed for the local and sustained release of drugs, addressing key characteristics necessary for effective clinical use such as viscosity and drug release rates.
- Methods included testing the injectability of the pastes and assessing drug degradation and release stability, while pharmacokinetic evaluations were performed on formulations of lidocaine and an anti-cancer drug using rat and mouse models.
- Results showed that the composition of the IPPs can be adjusted to control their viscosity and injectability, leading to long-term stability and effective drug release in animal models, suggesting their potential for treating various diseases.
Article Abstract
Purpose: We describe the preparation of injectable polymeric paste (IPP) formulations for local and sustained release of drugs. Furthermore, we include the characterization and possible applications of such pastes. Particular attention is paid to characteristics relevant to the successful clinical formulation development, such as viscosity, injectability, degradation, drug release, sterilization, stability performance and pharmacokinetics.
Methods: Paste injectability was characterized using measured viscosity and the Hagen-Poiseuille equation to determine injection forces. Drug degradation, release and formulation stability experiments were performed in vitro and drug levels were quantified using HPLC-UV methods. Pharmacokinetic evaluation of sustained-release lidocaine IPPs used five groups of six rats receiving increasing doses subcutaneously. An anti-cancer formulation was evaluated in a subcutaneous tumor xenograft mouse model.
Results: The viscosity and injectability of IPPs could be controlled by changing the polymeric composition. IPPs demonstrated good long-term stability and tunable drug-release with low systemic exposure in vivo in rats. Preliminary data in a subcutaneous tumor model points to a sustained anticancer effect.
Conclusions: These IPPs are tunable platforms for local and sustained delivery of drugs and have potential for further clinical development to treat a number of diseases.
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| http://dx.doi.org/10.1007/s11095-019-2730-4 | DOI Listing |
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