Ternary nanoparticle rigidity regulates mRNA vaccines transportation

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Immunology

Background:

• Messenger RNA (mRNA) delivery systems are crucial for therapeutics, but their transport to lymphatic tissues is not fully understood.
• Nanoparticle design often overlooks the impact of mechanical properties like elasticity on biodistribution.
• Understanding how nanoparticle rigidity affects lymphatic targeting is essential for optimizing mRNA delivery.

Purpose of the Study:

• To investigate the role of nanoparticle elasticity in lymphatic transport and mRNA delivery.
• To synthesize and characterize mRNA-loaded nanoparticles with tunable elastic moduli.
• To compare the in vitro and in vivo performance of rigid versus soft mRNA delivery systems.

Main Methods:

• Synthesis of ternary nanoparticles encapsulating mRNA with varying elastic moduli.
• In vitro assessment of cellular internalization and transfection efficiency.
• In vivo evaluation of lymph node accumulation, dendritic cell uptake, and protein expression.

Main Results:

• Rigid nanoparticles showed higher cellular uptake and transfection efficiency in vitro.
• Soft nanoparticles exhibited superior bovine serum albumin (BSA) binding.
• In vivo, soft nanoparticles demonstrated enhanced lymph node accumulation and dendritic cell uptake for protein expression.

Conclusions:

• Nanoparticle elasticity significantly influences mRNA delivery and immune response.
• Softer nanoparticles are potentially more suitable for in vivo mRNA delivery to lymphatic tissues.
• Findings provide insights into optimizing nanoparticle design for enhanced mRNA therapeutics and immune modulation.