Lubricating Block Copolymers Mimicking Lubricin for Boundary Lubrication

The patent creates simplified polymer copies of lubricin's key functional domains (mucin-like domain for lubrication and C-terminal domain for binding) using synthetic polymers that mimic the essential properties without requiring complex protein synthesis and glycosylation processes

The invention uses block copolymer compositions combining hydrophilic blocks (mimicking mucin domain) and anchoring blocks (mimicking C-terminal domain) to create a composite material that reproduces lubricin's dual functionality of lubrication and surface binding

The patent applies different functional blocks to different regions of the copolymer molecule: hydrophilic blocks provide lubrication at the interface while anchoring blocks provide binding to cartilage surface, creating local functional specialization that addresses both viscosity and friction reduction

The block copolymers act as intermediaries between synovial fluid and cartilage surface, providing both viscous properties in the fluid phase and binding capability to the surface, bridging the gap between hyaluronic acid's fluid properties and lubricin's surface properties

The patent replaces complex natural lubricin protein with simplified synthetic polymer copies that can be manufactured at scale using standard polymer synthesis techniques, eliminating the need for complex biomanufacturing processes

The invention changes the fundamental chemical parameters from protein-based to polymer-based, allowing production through well-established polymer chemistry methods that are more scalable and cost-effective than recombinant protein production