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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Parenteral drug delivery systems play a crucial role in modern therapeutics by enabling the direct administration of drugs into the systemic circulation, bypassing the gastrointestinal tract. These systems are particularly valuable for poorly absorbed oral medications that are unstable in the digestive environment or require rapid onset or sustained therapeutic levels. Delivery is achieved through intravenous, intramuscular, or subcutaneous routes, each selected based on the drug's properties...
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Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
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Conventional oral drug products, termed immediate-release (IR) formulations, are engineered to promptly release their active pharmaceutical ingredient (API) upon ingestion, typically in tablets or capsules. This rapid release often results in swift drug absorption and consequent pharmacodynamic effects, although the timing and intensity can vary depending on the drug's properties. Prodrugs within these formulations require metabolic conversion to activate their pharmacodynamic effects,...
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Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
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Area of Science:

  • Biomedical Engineering
  • Drug Delivery
  • Molecular Therapy

Background:

  • Nucleic acid (NA) therapies, including gene, aptamer, and antisense oligonucleotide treatments, offer potential for severe diseases like cancer and AIDS.
  • Effective NA delivery into targeted cells is crucial for therapeutic success, as NAs are inefficient when administered alone.
  • Viral vectors show high efficacy but have drawbacks, driving research towards non-viral delivery systems.

Purpose of the Study:

  • To review the characteristics and limitations of nucleic acid molecules for pharmaceutical formulation and administration.
  • To provide an update on the latest developments in in vivo applications of viral and non-viral NA delivery systems.
  • To identify research gaps hindering the clinical application of NA therapies.

Main Methods:

  • Literature review of nucleic acid therapies and delivery systems.
  • Analysis of viral and non-viral vector technologies for NA delivery.
  • Evaluation of pre-clinical and clinical study requirements for NA-based therapeutics.

Main Results:

  • Non-viral NA delivery systems face challenges in in vivo efficacy, limiting clinical translation.
  • While viral vectors are effective, research is increasingly focused on overcoming non-viral vector limitations.
  • A significant gap exists in pre-clinical studies using specific disease animal models for NA delivery systems.

Conclusions:

  • Development of effective NA delivery systems remains a critical challenge in pharmaceutical technology.
  • Further research, particularly in disease-specific animal models, is essential to bridge the gap between pre-clinical findings and human clinical trials.
  • Addressing in vivo failure of NA delivery systems is paramount for their successful clinical application.