Lipid, sugar and liposaccharide based delivery systems.

Area of Science:

• Pharmacology
• Drug Delivery Systems
• Bioconjugation Chemistry

Background:

• Significant challenges exist in delivering biologically active drugs orally due to absorption barriers.
• Physical and chemical strategies are being developed to improve drug absorption.
• Lipophilic modification and carbohydrate conjugation offer promising avenues for enhanced oral drug delivery.

Purpose of the Study:

• To review methods for enhancing oral drug absorption using lipophilic and carbohydrate modifications.
• To explore how these modifications target specific cellular uptake mechanisms.
• To highlight the potential of these conjugates as prodrugs or new active molecules.

Main Methods:

• Exploiting lipophilic modification to enhance passive diffusion of drugs.
• Utilizing mono and oligosaccharide conjugation to target sugar transport systems.
• Developing drug delivery units tailored for specific absorption routes (skin, gut, brain).

Main Results:

• Lipid modification effectively targets passive diffusion pathways.
• Sugar conjugation successfully targets sugar transport systems for drug uptake.
• Conjugates can be designed to release drugs post-absorption (prodrugs) or act as new entities.

Conclusions:

• Lipid and sugar conjugation represent effective strategies for overcoming oral drug delivery barriers.
• These modifications enable targeted delivery across various biological barriers.
• The development of lipid, sugar, and lipid-sugar conjugates shows significant potential for improving drug bioavailability and efficacy.