Surfactants influence polymer nanoparticle fate within the brain

Area of Science:

• Neuroscience
• Materials Science
• Nanotechnology

Background:

• Drug delivery to the brain is hindered by the blood-brain barrier (BBB) and poor penetration within brain tissue.
• Nanoparticle surface chemistry is crucial for overcoming these delivery barriers.
• Surfactants like poloxamer 188 (F68), poloxamer 407 (F127), and polysorbate 80 (P80) influence nanoparticle behavior.

Purpose of the Study:

• To evaluate the effect of common surfactants on poly (lactic-co-glycolic acid)-poly (ethylene glycol) (PLGA-PEG) nanoparticle transport within the brain.
• To understand how surfactant choice influences nanoparticle diffusion, cellular interaction, and targeting within the brain.
• To optimize nanotherapeutic design for efficient brain drug delivery.

Main Methods:

• Formulation of PLGA-PEG nanoparticles with various surfactants: cholic acid (CHA), F68, F127, P80, and poly (vinyl alcohol) (PVA).
• Assessment of nanoparticle diffusion through brain tissue.
• In vivo administration of nanoparticles and evaluation of BBB penetration and cellular uptake in neurons and microglia.

Main Results:

• Surfactant inclusion reduced nanoparticle diffusion through brain tissue.
• PLGA-PEG/P80 nanoparticles exhibited enhanced BBB penetration.
• These P80-coated nanoparticles were effectively internalized by neurons and microglia.

Conclusions:

• Surfactants are critical design parameters for controlling nanoparticle fate in the brain.
• Surface chemistry, specifically the choice of surfactant, significantly impacts nanoparticle delivery efficiency.
• Optimizing surfactant selection can enhance nanotherapeutic strategies for brain drug delivery.