Exploring the sonodynamic effects of bacteriochlorophyll a

Area of Science:

• Biochemistry
• Biophysics
• Oncology

Background:

• Bacteriochlorophyll a (BCA) is a pigment with potential applications in biomedical imaging and therapy.
• Near-infrared fluorescence (NIRF) imaging offers advantages for deep tissue visualization.
• Sonodynamic therapy (SDT) utilizes ultrasound and a photosensitizer to induce tumor cell death.

Purpose of the Study:

• To evaluate BCA as a diagnostic agent in NIRF imaging.
• To investigate BCA's efficacy in mediating sonodynamic antitumor effects.
• To explore the underlying mechanisms of BCA-mediated SDT.

Main Methods:

• UV-Vis and fluorescence spectroscopy were used to characterize BCA.
• IVIS Lumina imaging system and confocal laser scanning microscopy (CLSM) were employed for fluorescence imaging and cellular localization studies.
• LLC cells were used to assess BCA uptake, cytotoxicity, and ROS generation following SDT.

Main Results:

• BCA exhibited fluorescence properties suitable for imaging.
• BCA-mediated SDT significantly enhanced cytotoxicity in LLC cells compared to control groups.
• SDT treatment led to increased intracellular reactive oxygen species (ROS) levels and inhibited tumor cell growth.

Conclusions:

• BCA demonstrates potential as a diagnostic factor in NIRF imaging.
• BCA acts as an effective sonosensitizer, inducing tumor cell death through ROS generation.
• BCA-mediated SDT presents a promising therapeutic strategy for lung cancer.