Photoactivated drug delivery and bioimaging

Area of Science:

• Biomedical Engineering
• Nanomedicine
• Photochemistry

Background:

• Cancer is a leading cause of mortality, necessitating advanced treatment strategies.
• Current cancer therapies face challenges including significant patient burden and side effects.
• Stimuli-responsive drug delivery and bioimaging systems are crucial for enhancing therapeutic efficiency.

Purpose of the Study:

• To review recent advancements in light-activated drug release and bioimaging for cancer treatment.
• To explore various photoresponsive strategies for controlled therapeutic and imaging agent delivery.
• To discuss the potential and challenges of photo-based cancer theranostics.

Main Methods:

• Review of literature on photoactivated cancer therapies.
• Discussion of strategies including photocages, photoisomerization, optical upconversion, and photothermal release.
• Analysis of light-responsive systems sensitive to UV, visible, and near-infrared (NIR) light.

Main Results:

• Photoactivated approaches enable precise spatial and temporal control over drug release and bioimaging agent activation.
• NIR light offers advantages over UV/visible light, including deeper tissue penetration and reduced photodamage.
• Various light-triggered mechanisms facilitate targeted delivery and activation of therapeutic and diagnostic agents.

Conclusions:

• Photoactivated nanomedicine holds significant potential for improving cancer theranostics.
• NIR-based strategies present a promising avenue for minimally invasive and effective cancer treatment.
• Further research is needed to address challenges and optimize photo-based cancer therapies.