1. Ultrasound Controlled Anti-Inflammatory Polarization of Platelet Decorated Microglia for Targeted Ischemic Stroke Therapy.
- Author
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Li Y, Teng X, Yang C, Wang Y, Wang L, Dai Y, Sun H, and Li J
- Subjects
- Animals, Apoptosis physiology, Blood Platelets chemistry, Cell Engineering, Infarction, Middle Cerebral Artery complications, Infarction, Middle Cerebral Artery metabolism, Infarction, Middle Cerebral Artery therapy, Inflammation etiology, Inflammation metabolism, Interleukin-4 chemistry, Interleukin-4 metabolism, Ischemic Stroke complications, Ischemic Stroke metabolism, Liposomes chemistry, Liposomes radiation effects, Male, Mice, Inbred C57BL, Microglia chemistry, Neurogenesis physiology, Protoporphyrins chemistry, Recovery of Function physiology, Ultrasonic Waves, Mice, Blood Platelets metabolism, Inflammation therapy, Ischemic Stroke therapy, Microglia metabolism
- Abstract
Stroke is a lethal cerebral disease with severe sequelae and high mortality. Microglia, the main immune cell in the cerebrum, possess therapeutic potential for strokes as its specific anti-inflammatory phenotype can reduce inflammation and promote neuron regeneration. However, the on-demand anti-inflammatory polarization of microglia at the stroke site is uncontrollable for therapeutic application. Here, we develop a platelet hybrid microglia platform which can specifically polarize to the anti-inflammatory phenotype by ultrasound irradiation for targeted cerebrum repair after stroke. The engineered microglia have strong adherence to the injured cerebral vessels with platelet membrane fusion and realize on-demand anti-inflammatory polarization with ultrasound-responsive IL-4 liposome decoration. The intravenously injected microglia platform showed anti-inflammatory polarization at the stroke site with insonation, and accelerated the M2-type polarization of endogenous microglia for long-term stroke recovery. Satisfied prognoses were achieved with reduced apoptosis, promoted neurogenesis, and functional recovery, indicating the implications of the microglia platform for stroke therapy., (© 2020 Wiley-VCH GmbH.)
- Published
- 2021
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