Cyclic Conjugated Peptides Extend Platelet Storage Life
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Solution Overview
Problem
Current methods for storing platelets are limited by rapid clearance and contamination, leading to chronic shortages and increased costs in clinical transfusions, as platelets do not tolerate refrigeration well and have a short shelf life due to bacterial contamination and rapid clearance by immune cells.
Innovation Solution
Development of cyclic conjugated peptides (CCPs) that bind non-covalently to the GPIbα chain on platelets, inhibiting interactions with Mac-1 and VWF receptors, thereby preventing rapid clearance and extending the storage life of platelets beyond 48 hours while maintaining hemostatic function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If platelets are stored at room temperature for extended periods, then storage duration is increased, but bacterial contamination risk increases
Solution Approach 1:
The patent changes the storage temperature parameter from room temperature to refrigeration temperatures (2°C to 10°C), which fundamentally alters the storage conditions to extend shelf life while controlling bacterial growth through temperature-dependent bacterial metabolism suppression
2Duration of action of stationary object
If platelets are refrigerated for long-term storage, then storage duration is extended, but platelet clearance by immune cells increases
Solution Approach 1:
The patent modifies the local quality of platelet surface glycans by adding sialic acid residues to specific terminal positions, creating a protective molecular layer that selectively prevents recognition by asialoglycoprotein receptors on immune cells while maintaining platelet functionality
Solution Approach 2:
The patent introduces sialic acid as an intermediary molecular layer between the platelet surface and immune cell receptors, which acts as a protective barrier that prevents direct interaction between platelet glycans and clearance receptors, thereby extending circulation time
3Reliability
If platelets are stored at room temperature, then platelet function is maintained, but shelf life is limited to 48 hours
Solution Approach 1:
The patent changes the temperature parameter from room temperature to controlled refrigeration (2°C to 10°C), which slows metabolic processes and bacterial growth while preserving platelet function through controlled cooling that prevents cold-induced activation
Solution Approach 2:
The patent applies preliminary glycan modification with sialic acid to platelets before storage, which pre-establishes protection against immune clearance mechanisms, allowing the platelets to withstand refrigeration and extended storage without rapid post-transfusion clearance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The CCPs effectively prevent the rapid clearance of cold-stored platelets, reducing contamination risks and extending their shelf life, thereby improving the availability and safety of platelet transfusions for thrombocytopenic patients.
Implementation Method 1
cyclic conjugated peptides (CCPs) that bind non-covalently to the GPIbα chain on platelets
Data Source
AI summary
Provided herein are methods and compositions, including pharmaceutical compositions, for treating thrombosis, vascular inflammation, and thrombocytopenia. The methods and compositions of the present invention are also useful for extending the useful storage shelf life of platelets.