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Related Concept Videos

Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

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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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Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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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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Modified-Release Drug Delivery Systems: Stimuli-Activated01:30

Modified-Release Drug Delivery Systems: Stimuli-Activated

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Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also...
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Targeted Cancer Therapies02:57

Targeted Cancer Therapies

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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
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Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention

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Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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Drug Distribution: Tissue Binding01:21

Drug Distribution: Tissue Binding

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Upon entering the systemic circulation, drugs can distribute into the interstitial and intracellular fluid of various tissue cells. This distribution is facilitated by the binding of drugs to different cellular components within tissues, which may lead to drug accumulation in specific areas. Drugs bound to tissue components serve as reservoirs that release free drugs back into the system, prolonging the drug's overall action. However, this accumulation can also result in local toxicity.
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Updated: Apr 17, 2026

Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?
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Engineering Biomaterial-Drug Conjugates for Local and Sustained Chemotherapeutic Delivery.

Jeannine M Coburn1, David L Kaplan1

  • 1†Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States.

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Chemotherapy drugs cause severe side effects. Controlled release drug carriers and biomaterial conjugation can reduce toxicity and improve cancer treatment by targeting tumors more effectively.

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Area of Science:

  • Oncology
  • Biomaterials Science
  • Drug Delivery Systems

Background:

  • Standard cancer care involves surgery, radiation, and chemotherapy using cytotoxic drugs.
  • Cytotoxic chemotherapy often leads to significant side effects, including cardiotoxicity, ototoxicity, nephrotoxicity, peripheral neuropathy, and myelosuppression.
  • Reducing these secondary toxicities while enhancing tumor drug concentration is a critical clinical need.

Purpose of the Study:

  • To review existing clinically utilized drug carrier systems for chemotherapy delivery.
  • To explore novel approaches in drug-biomaterial conjugation for enhanced cancer therapy.
  • To highlight strategies for controlled release of cytotoxic agents to minimize systemic toxicity.

Main Methods:

  • Literature review of clinically approved drug delivery systems.
  • Analysis of recent research on drug-biomaterial conjugation techniques.
  • Examination of controlled-release mechanisms for cytotoxic chemotherapy.

Main Results:

  • Drug carrier systems offer a viable method to manage chemotherapy side effects.
  • Biomaterial conjugation presents innovative pathways for targeted drug delivery.
  • Controlled release technologies show promise in improving the therapeutic index of chemotherapeutic agents.

Conclusions:

  • Controlled release drug carriers are essential for mitigating chemotherapy-induced toxicities.
  • Drug-biomaterial conjugation represents a promising frontier in targeted cancer therapy.
  • Further development in these areas could significantly improve patient outcomes in oncology.