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Related Concept Videos

Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...
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Group therapy is a sociocultural approach to psychological treatment, where individuals with shared psychological challenges come together under the guidance of a mental health professional. This therapeutic modality offers unique opportunities for individuals to connect, share, and grow within the context of a supportive group. By fostering mutual understanding and collaboration, group therapy can address a range of psychological concerns effectively, often complementing or surpassing the...
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Polymer Classification: Architecture01:14

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
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Updated: Feb 1, 2026

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
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Functional Polymer Nanocarriers for Photodynamic Therapy.

Tuanwei Li1, Lifeng Yan2

  • 1CAS Key Laboratory of Soft Matter Chemistry, iChEM, and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China. lituanwe@mail.ustc.edu.cn.

Pharmaceuticals (Basel, Switzerland)
|December 6, 2018
PubMed
Summary

Photodynamic therapy (PDT) uses photosensitizers (PSs) for cancer treatment. Functional polymer nanoparticles enhance PDT efficacy by improving PS delivery and utilizing tumor hypoxia.

Keywords:
hypoxiananocarriersphotodynamic therapyphotosensitizers

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Oncology

Background:

  • Photodynamic therapy (PDT) offers minimally invasive treatment with low systemic toxicity for solid tumors.
  • Current limitations include photosensitizer hydrophobicity, poor selectivity, tumor hypoxia, and limited light penetration.
  • Functional polymer nanoparticles present a promising solution as nanocarriers for targeted PDT.

Purpose of the Study:

  • To elucidate the mechanism and application of PDT in cancer treatment.
  • To review strategies for optimizing photosensitizer (PS) biodistribution and activation.
  • To enhance PDT effects by addressing the tumor microenvironment, particularly hypoxia.

Main Methods:

  • Review of existing literature on PDT mechanisms and applications.
  • Analysis of strategies utilizing functional polymer nanoparticles as PS nanocarriers.
  • Exploration of methods to manage tumor hypoxia for improved therapeutic outcomes.

Main Results:

  • Functional polymer nanoparticles can overcome PS limitations like hydrophobicity and non-selectivity.
  • Strategies exist to modulate PS biodistribution and activation within the tumor microenvironment.
  • Utilizing or ameliorating tumor hypoxia can significantly enhance PDT efficacy.

Conclusions:

  • Functional polymer nanoparticles are effective nanocarriers for improving PDT.
  • Targeted delivery and activation of PSs, coupled with microenvironment modulation, enhance cancer treatment.
  • PDT holds significant potential for clinical application with optimized nanocarrier strategies.