Abstract: Nanocomplex for targeted repairing of neurovascular lesion. The nanocomplex comprises a lipid, an apolipoprotein and a targeted peptide, the targeted peptide formed by covalently linking, through a bridge structure, a nanocarrier linking end and a peptide chain targeting RAGE, which specifically binds to cerebrovascular lesion site. Based on AD and the high expression of RAGE in cerebrovascular and brain parenchyma in diabetic encephalopathy, the nanocomplex, as modified by the targeted peptide, can mainly bind, in a targeted manner, to cerebrovascular endothelium by linking the targeted peptide, to repair vascular endothelial cells, promote removal of AB plaque near blood vessels, and repair cerebrovascular and neurovascular unit components such as microglial cells, astrocytes and neurons. Ameliorating cognitive impairment is achieved by combined repairing of multiple components and restoring cerebrovascular functions and cerebral blood flow.

Abstract: Disclosed is a nanocomplex, a preparation method therefor, and a use thereof. The nanocomplex comprises 0-60% a protein drug, 0.03-15% hyaluronic acid, 0.8-20% protamine, 35-95% lipid components, and 2.5-40% a apolipoprotein and/or a mimetic peptide thereof; the lipid components comprise an electrically neutral lipid and an anionic lipid; and the total amount of hyaluronic acid and protamine is 0.03-15%. The nanocomplex of the present invention provides a general-type carrier for protein drugs having different physicochemical properties (such as molecular weights of 10-255 KDa and PIs of 4-11), implements highly efficient intracellular, in vivo, and even in-brain delivery, utilized technology is universal in nature, and said invention can effectively solve the current problem of insufficient in vivo and in vitro transport of protein drugs (comprising a protein drug exceeding the molecular weight and PI of an embodiment).

Abstract: A lipid nano drug delivery system targeting a brain lesion and a preparation method and application thereof. The drug delivery system comprises a lipid, a delivery drug, and a functional penetrating peptide, and the functional penetrating peptide is formed by covalently connecting a peptide chain linking a nanocarrier end, an arginine-rich penetrating peptide, a matrix metalloproteinase-9 sensitive peptide, and a polyanion inhibitory peptide. The lipid nano drug delivery system can be used for targeting the brain lesion and realizing mitochondrial enrichment by means of modification of the functional penetrating peptide.