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Smart functional nucleic acid chimeras: enabling tissue specific RNA targeting therapy.

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Summary

Nucleic acid aptamers offer targeted delivery for therapeutic oligonucleotides, overcoming cellular uptake challenges. Aptamer-oligonucleotide chimeras show promise for disease treatment, with chemical modifications enhancing stability.

Keywords:
Aptamer targeted deliveryaptamer chimeraaptamersmiRNA deliverymodified nucleotidessiRNA delivery

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Area of Science:

  • Biotechnology and Molecular Medicine
  • Drug Delivery Systems
  • Nucleic Acid Therapeutics

Background:

  • Effective delivery of therapeutic oligonucleotides (e.g., siRNA, antisense, antimiRs) to target tissues remains a significant challenge.
  • Poor cellular uptake of these therapeutic agents limits their efficacy in both in vitro and in vivo applications.
  • Nucleic acid aptamers are emerging as key players in targeted therapy due to their high affinity and specificity.

Purpose of the Study:

  • To review the applications of nucleic acid aptamers in achieving target-specific delivery of therapeutic oligonucleotides.
  • To highlight the potential of aptamer-oligonucleotide chimeras in enhancing therapeutic efficacy and monitoring.
  • To discuss the importance of chemically modified nucleic acid analogs for improving the bio-stability of chimeric conjugates.

Main Methods:

  • Selection of high-affinity, specific nucleic acid aptamers from large pools against chosen molecular targets.
  • Design and evaluation of aptamer-oligonucleotide chimeras for the delivery of various therapeutic payloads (siRNA, antimiRs, small molecules).
  • Investigation of chemically modified nucleic acid analogs to enhance the stability of aptamer-based conjugates.

Main Results:

  • Nucleic acid aptamers demonstrate significant potential for targeted delivery of therapeutic oligonucleotides.
  • Aptamer-oligonucleotide chimeras have shown promising results in delivering therapeutics to various targets across different disease models.
  • Chemically modified nucleic acid analogs are crucial for improving the bio-stability of these chimeric delivery systems.

Conclusions:

  • Nucleic acid aptamers are a powerful tool for overcoming the delivery obstacles associated with therapeutic oligonucleotides.
  • Aptamer-oligonucleotide chimeras represent a promising strategy for targeted gene therapy and drug delivery.
  • Further development incorporating modified nucleic acids will enhance the clinical applicability of aptamer-based therapeutics.