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A novel light-triggered system enhances aptamer therapeutics by controlling their release. This improves tumor retention and reduces off-target accumulation in organs like the liver and kidney.

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Area of Science:

  • Biotechnology
  • Drug Delivery
  • Oligonucleotide Therapeutics

Background:

  • Aptamers offer therapeutic potential but face challenges in targeted delivery and accumulation in vivo.
  • Minimizing off-target uptake, particularly in organs like the liver and kidney, is crucial for improving aptamer-based therapies.
  • Spatiotemporal control over aptamer activity is needed to enhance therapeutic efficacy and safety.

Purpose of the Study:

  • To develop and evaluate a light-triggered system for spatiotemporal regulation of aptamer activity.
  • To improve target-specific accumulation of aptamers in vivo.
  • To reduce off-target uptake of aptamers in non-target organs.

Main Methods:

  • Design of a photo-labile complementary oligonucleotide to hybridize with the aptamer, preventing cell binding.
  • In vitro and in vivo testing of the light-triggered system.
  • Irradiation at the tumor site to liberate the active aptamer.
  • Quantification of aptamer distribution in tumor tissue, liver, and kidney.

Main Results:

  • The light-triggered system successfully regulated aptamer activity in a spatiotemporal manner.
  • Irradiation led to the liberation of the aptamer at the tumor site.
  • Prolonged intratumoral retention of the aptamer was observed post-irradiation.
  • Significantly decreased relative distribution of the aptamer to the liver and kidney compared to free aptamers.

Conclusions:

  • Light-triggered aptamer systems offer a promising strategy for enhancing therapeutic applications.
  • Spatiotemporal control improves aptamer retention at the target site.
  • This approach effectively minimizes off-target accumulation, suggesting improved safety profiles for aptamer therapeutics.