The application discloses a self-derived
protein anticoagulant coating and a preparation method and application thereof. The
coating utilizes the oxidation of
hydrogen peroxide generated by the reaction of an
oxidizing agent or a
reducing agent with
oxygen in the air, is based on the endogenous
active center (such as hematin) removal mechanism of self-extracted proteins (such as
hemoglobin), induces the oxidative self-
assembly of the proteins, and loads an
anticoagulant in the
assembly process to form a
protein-
anticoagulant composite nanofilm. The application utilizes the self-proteins to avoid the transmission risk of pathogens such as HIV, PERVs and prions from the source; the preparation method is simple and rapid, and the obtained
coating has excellent adhesion stability, good
biocompatibility and anti-
biofouling capacity on the surface of various substrates. In-vitro and in-vivo experiments prove that the coating has superior anticoagulant performance, reduces the risk of bleeding and
liver and kidney toxicity, and can be used for the
surface modification of blood-contacting medical devices such as a heart
stent, an artificial
blood vessel, a
central venous catheter and an
extracorporeal oxygenator.