This invention relates to a mitochondrial composite nanosystem DTPS@Mito targeting
lung inflammation, comprising a mitochondrial core and a functionalized lipid material DSPE-TK-PEG2000-SA modified on its surface. DSPE acts as a hydrophobic anchor inserted into the mitochondrial outer membrane, PEG2000 provides hydrophilicity and
biocompatibility, ketithiothiol bonds serve as ROS-responsive linkers, and
sialic acid targets the head group to specifically bind to E-
selectin, which is highly expressed at the inflammatory site. The DTPS@Mito particles have a
diameter of approximately 832 nm, maintaining intact mitochondrial morphology and
protein composition.
In vitro experiments show that it significantly inhibits the expression of
inflammatory factors, reduces ROS levels, restores
ATP production, and regulates mitochondrial dynamics.
In vivo experiments show that it has enhanced retention and accumulation capacity in the lungs of
ARDS mice, significantly alleviating
lung inflammation,
tissue damage, and
oxidative stress, and reducing hyaline membrane formation. This invention achieves the synergistic integration of three major functions: mitochondrial
transplantation, targeted delivery, and antioxidation, and can be used to prepare drugs for the treatment of
acute respiratory distress syndrome.