Recent progress in metal complexes functionalized nanomaterials for photodynamic therapy.

Area of Science:

• Nanomaterials Science
• Materials Chemistry
• Biomedical Engineering

Background:

• Metal complexes are investigated as photosensitizers for cancer diagnosis and therapy.
• Existing metal photosensitizers suffer from limitations like poor pharmacokinetics, toxicity, and ineffective tumor penetration, especially in hypoxic environments.

Purpose of the Study:

• To review strategies for preparing metal complex-functionalized nanomaterials for photodynamic therapy (PDT).
• To highlight how these nanomaterials can overcome limitations of traditional metal photosensitizers.
• To discuss their potential in modulating the tumor microenvironment (TME) and enabling combination therapies for enhanced PDT efficacy.

Main Methods:

• Review of recent research strategies for synthesizing metal complex-functionalized nanomaterials.
• Discussion of methods including metal coordination bonds, self-assembly, π-π stacking, and physisorption.
• Analysis of how these strategies address challenges in PDT.

Main Results:

• Metal complex-functionalized nanomaterials offer a multifunctional platform for PDT.
• These systems can mitigate issues such as poor pharmacokinetics, off-target toxicity, and rapid clearance.
• Nanomaterial functionalization aids in TME modulation and facilitates combination therapies.

Conclusions:

• Metal complex-functionalized nanomaterials represent a significant advancement in PDT.
• They provide a versatile approach to enhance therapeutic efficacy and overcome current limitations.
• Further research in this area holds great promise for improved cancer treatment strategies.