Cascade Catalytic Nanoparticles Selectively Alkalize Cancerous Lysosomes to Suppress Cancer Progression and Metastasis

Area of Science:

• Nanotechnology
• Cancer Biology
• Biochemistry

Background:

• Lysosomes play a crucial role in cancer progression and metastasis.
• Existing lysosomal alkalizers lack selectivity and safety.
• There is a need for targeted therapies to modulate lysosomal function in cancer.

Purpose of the Study:

• To develop and evaluate an effective, selective, and safe lysosomal alkalizer for cancer therapy.
• To investigate the mechanism of action of the novel alkalizer on cancer lysosomes and autophagy.
• To assess the in vivo efficacy of the lysosomal alkalizer in inhibiting tumor growth and metastasis.

Main Methods:

• Design of a nanoparticle-based lysosomal alkalizer with an iron oxide core and cerium oxide satellites.
• In vitro assessment of the alkalizer's ability to generate hydroxide ions and alter lysosomal pH.
• In vivo studies in mice to evaluate tumor inhibition, metastasis suppression, and safety.

Main Results:

• The lysosomal alkalizer selectively targets cancer lysosomes, increasing their pH.
• Alkalized lysosomes exhibit impaired enzyme activity and autophagy, leading to cancer cell apoptosis.
• The alkalizer effectively inhibited local and systemic tumor growth and metastasis in mouse models.
• The developed agent demonstrated both selectivity and safety in preclinical evaluations.

Conclusions:

• Nanoparticle intrinsic properties can be utilized to create effective lysosomal alkalizers.
• This novel lysosomal alkalizer shows significant potential for cancer treatment by targeting lysosomal function.
• The developed agent offers a promising new therapeutic strategy for inhibiting cancer progression and metastasis.