Background: Nucleus targeted drug delivery provides several opportunities for the treatment
of fatal diseases such as cancer. However, the complex nucleocytoplasmic barriers pose significant
challenges for delivering a drug directly and efficiently into the nucleus. Aptamers representing singlestranded
DNA and RNA qualify as next-generation highly advanced and personalized medicinal agents
that successfully inhibit the expression of certain proteins; possess extraordinary gene-expression for
manoeuvring the diseased cell's fate with negligible toxicity. In addition, the precisely directed aptamers
to the site of action present a tremendous potential to reach the nucleus by escaping the ensuing
barriers to exhibit a better drug activity and gene expression.
Objective: This review epigrammatically highlights the significance of targeted drug delivery and presents
a comprehensive description of the principal barriers faced by the nucleus targeted drug delivery
paradigm and ensuing complexities thereof. Eventually, the progress of nucleus targeting with nucleic
acid aptamers and success achieved so far have also been reviewed.
Methods: Systematic literature search was conducted of research published to date in the field of nucleic
Results and Conclusion: The review specifically points out the contribution of individual aptamers as
the nucleus-targeting agent rather than aptamers in conjugated form.