Boosting Natural Killer Cells' Immunotherapy with Amoxicillin-Loaded Liposomes

Area of Science:

• Immunology
• Pharmacology
• Oncology

Background:

• Natural killer (NK) cell immunotherapy is a promising cancer treatment modality.
• Understanding how to enhance NK cell efficacy is crucial for improving therapeutic outcomes.

Purpose of the Study:

• To investigate the mechanisms by which amoxicillin augments NK cell cytotoxicity.
• To evaluate the therapeutic potential of amoxicillin-loaded liposomes in a preclinical cancer model.

Main Methods:

• Assessing NK-92MI cell cytotoxicity against MCF-7 cells with and without amoxicillin.
• Evaluating NK cell recognition and degranulation in response to amoxicillin.
• Utilizing amoxicillin-loaded liposomes (AMO@Liposome) in a mouse breast cancer model.
• Performing RNA transcriptome analysis to identify molecular pathways affected by amoxicillin.

Main Results:

• Amoxicillin significantly enhanced NK-92MI cell cytotoxicity by initiating cytolytic programs and augmenting degranulation.
• Low-concentration amoxicillin (10 ng/mL) improved NK cell target recognition.
• AMO@Liposome treatment demonstrated increased antitumor effects in a mouse breast cancer model.
• Amoxicillin upregulated genes in synaptic vesicle cycle and calcium signaling pathways, with FOSB, TNFRSF18, and H4C1 identified as key players.

Conclusions:

• Amoxicillin effectively boosts NK cell-mediated tumor killing through specific molecular pathways.
• Amoxicillin-loaded liposomes represent a viable strategy for enhancing NK cell immunotherapy.
• This approach holds significant potential for improving cancer treatment outcomes.