MOF-Functionalized Ultrasound-Trackable Magnetic Microrobots for Intracranial Toxin Removal.

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Neuroscience

Background:

• Toxin accumulation in cerebrospinal fluid (CSF), like bilirubin, causes severe neurological damage.
• Current intracranial toxin clearance methods are invasive and lack targeted delivery.
• Effective strategies are needed for safe and efficient removal of toxins from the brain.

Purpose of the Study:

• To develop multifunctional microrobots for targeted toxin removal in confined anatomical spaces.
• To address limitations of current therapies for intracranial bilirubin clearance.
• To create a minimally invasive method for brain toxin detoxification.

Main Methods:

• Fabrication of ultrasound-trackable microbubbles@PCN-333 microrobots (UMPCs) with a hydrogel core, MOF layer, and Fe3O4 nanoparticles.
• Utilizing magnetic actuation to enhance microrobot toxin capture efficiency and mass transfer.
• Integrating ultrafast ultrasound imaging with magnetic guidance for real-time UMPC tracking and control in CSF.

Main Results:

• UMPCs demonstrated high-capacity bilirubin adsorption due to the MOF layer.
• Magnetic actuation significantly improved bilirubin capture efficiency.
• Real-time tracking and precise control of UMPCs within the CSF were achieved using integrated imaging and actuation.

Conclusions:

• UMPCs provide a promising minimally invasive and actively guided strategy for intracranial bilirubin clearance.
• This approach offers enhanced toxin removal in specialized anatomical compartments.
• The developed microrobots open new avenues for targeted neuroprotection against toxic insults.