Sympathetic Nervous System-Driven T-Cell Exhaustion and Promoting T-Cell Priming and Trafficking in Breast Cancer...

科学分野:

• Oncology
• Immunology
• Nanotechnology

背景:

• Immunotherapy efficacy in solid tumors like breast cancer is limited by T cell dysfunction within the tumor microenvironment.
• Sympathetic nervous system (SNS) hyperactivation contributes to T cell exhaustion, presenting a therapeutic target.

研究 の 目的:

• To develop a multifunctional nanoplatform for enhanced breast cancer immunotherapy.
• To simultaneously address T cell priming, trafficking, activation, and exhaustion.

主な方法:

• A nanoplatform was engineered using dendritic cell membranes wrapping lipid nanoparticles.
• The nanoplatform codelivered carvedilol (a β-adrenergic receptor blocker) and S1PR1 mRNA.
• Nanovesicles were designed to target tumor-draining lymph nodes for enhanced antigen presentation and T cell priming.

主要な成果:

• The nanoplatform improved T cell priming and trafficking, while carvedilol mitigated SNS-mediated exhaustion.
• Combination therapy with PD-L1 blockade reduced tumor volume by 76% and extended median survival from 30 to 54 days.
• Complete tumor regression was observed in 60% of animals.

結論:

• This integrated nanoplatform strategy effectively overcomes immunotherapy resistance in breast cancer models.
• Simultaneous targeting of multiple T cell functions offers a promising approach for solid tumor treatment.