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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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Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...
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Functional Self-Immolative Hydrogels with Dendritic Cross-Linkers for Controlled Drug Delivery.

Silvia Muñoz-Sánchez1, Jue Gong2, Francisco Javier de la Mata1,3,4

  • 1Department of Organic and Inorganic Chemistry and Research Institute in Chemistry ″Andrés M. Del Río″ (IQAR), University of Alcalá, 28805 Madrid, Spain.

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We developed novel dendritic hydrogels using click chemistry for controlled degradation. These materials offer tunable properties and drug release, showing promise for biomedical applications.

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Area of Science:

  • Biomaterials science
  • Polymer chemistry
  • Click chemistry

Background:

  • Controlled material degradation is crucial for biomedical applications.
  • Dendrimers offer unique properties for material design.
  • Click chemistry provides efficient and specific network formation.

Purpose of the Study:

  • To synthesize and characterize a novel family of dendritic hydrogels.
  • To investigate the tunable degradation properties of these hydrogels.
  • To evaluate their potential for controlled drug release.

Main Methods:

  • Copper-assisted azide-alkyne cycloaddition click reaction.
  • Synthesis of bifunctional carbosilane dendrimers as cross-linkers.
  • Incorporation of cleavable and self-immolative polymers.

Main Results:

  • Dendritic hydrogels with tunable swelling and mechanical properties were successfully synthesized.
  • Degradation rates were controlled from hours to days, including pH-controlled conditions.
  • Curcumin release profiles were modulated by network degradation.

Conclusions:

  • Dendritic hydrogels offer precise control over degradation and properties.
  • Self-immolative hydrogels (SIHs) show significant potential for biomedical applications.
  • These materials enable tunable drug delivery systems.