This invention discloses a logic-responsive
biomolecule carrier based on a phase
separation system, its construction method, and its applications. The carrier is based on the attraction between cationic peptides with different logic responses and negatively charged biomolecules such as
DNA or
RNA, driving liquid-
liquid phase separation and forming droplet-like particle structures. The carrier of this invention can selectively use
protein kinase A (PKA) to phosphorylate peptides and use matrix metalloproteinases (MMPs) or
glutathione (GSH) to cleave the
peptide chain, thereby changing the
charge density of the
peptide to control the
controlled release of biomolecules. It exhibits excellent
biocompatibility, resistance to
enzymatic degradation, and
transfection efficiency, enabling effective delivery of biomolecules.