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CPP-Assisted Intracellular Drug Delivery, What Is Next?

Junxiao Ye1,2, Ergang Liu3,4, Zhili Yu5

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Cell-penetrating peptides (CPPs) enhance drug delivery into cells but can cause toxicity. This review explores new CPP designs for targeted chemotherapy, improving efficacy and reducing side effects in oncology.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Oncology

Background:

  • Cell-penetrating peptides (CPPs) are natural enhancers that facilitate cellular uptake of biomacromolecules.
  • CPPs overcome cell membrane barriers, enabling intracellular delivery of therapeutic payloads like genes and proteins.
  • Despite their potential, non-specific CPP delivery leads to widespread organ distribution, reducing therapeutic efficacy and increasing toxicity.

Purpose of the Study:

  • To review novel designs of CPP-linked vehicles and strategies.
  • To address challenges of non-specific delivery and toxicity associated with CPPs.
  • To advance the development of effective and less toxic chemotherapy for cancer treatment.

Main Methods:

  • Review of recent literature on CPP-based drug delivery systems.
  • Analysis of innovative CPP designs and conjugation strategies.
  • Evaluation of methods to enhance CPP targeting and reduce off-target effects.

Main Results:

  • Emerging CPP designs show improved specificity and controlled payload release.
  • Strategies for CPP functionalization enable targeted delivery to tumor cells.
  • New approaches mitigate systemic toxicity by minimizing normal tissue penetration.

Conclusions:

  • CPP-linked vehicles offer a promising platform for targeted cancer chemotherapy.
  • Advanced CPP designs and strategies are crucial for maximizing therapeutic benefits while minimizing adverse effects.
  • Further research into CPP-mediated delivery holds significant potential for improving patient outcomes in oncology.