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What is the desired maintained time of nanoparticles in cells for drug delivery? 


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The desired maintained time of nanoparticles in cells for drug delivery varies depending on the specific drug release requirements. Studies have shown that sustained drug release for a prolonged duration is a desired feature of modern drugs, with examples of nanoparticles achieving this goal. Nanoparticles can enhance and sustain drug delivery inside cells, with some formulations demonstrating sustained release over a 15-day period in vitro. Additionally, the development of a continuous flow microreactor and an in vitro microfluidic drug delivery model have been introduced to analyze real-time drug efficacy and cytotoxic effects, showcasing the potential for on-demand screening of cancer drugs. These findings highlight the importance of maintaining nanoparticles in cells for extended periods to achieve sustained and effective drug delivery.

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The nanoparticles demonstrated sustained release of doxorubicin over a 15-day period in vitro, indicating the desired maintained time for drug delivery into cells.
Journal ArticleDOI
Jeffrey A. Hubbell, Ashutosh Chilkoti 
20 Jul 2012-Science
443 Citations
Nanoparticles for drug delivery aim to extend circulation time by overcoming barriers, with some designs projecting a 100-hour half-life extension for therapeutic proteins, enhancing drug efficacy.
The nanoparticles are designed for real-time drug delivery into apoptotic cancer cells, with a focus on efficient drug transport kinetics rather than a specific desired maintenance time in cells.
The sustained drug release achieved by double-loaded self-decomposable SiO₂ nanoparticles demonstrated a Tmax of about 8 hours in blood circulation, with a plasma elimination half-life of approximately 28 hours.
The desired maintained time of nanoparticles in cells for drug delivery is typically 48 hours, as it mimics the residence time of nanoparticles in vivo, preventing aggregation and ensuring efficacy.

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