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Anticoagulant Drugs: Low-Molecular-Weight Heparins

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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...

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Polyelectrolyte Complex for Heparin Binding Domain Osteogenic Growth Factor Delivery

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Recombinant supercharged polypeptides for safe and efficient heparin neutralization.

Jianfei Tu¹, Qing Liu², Shengye You²

¹Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Imaging Diagnostic and Interventional Minimally Invasive Institute, the Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, 323000, Zhejiang, China. jijiansong@zju.edu.cn.

Biomaterials Science

|July 3, 2023

Summary

This summary is machine-generated.

Supercharged polypeptides show promise as a safer alternative to protamine sulfate for reversing heparin

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Area of Science:

Biochemistry
Biotechnology
Pharmacology

Background:

Heparin is a crucial anticoagulant, but its effects require reversal.
Protamine sulfate (PS) is the standard antidote but causes severe adverse effects.
There is a need for safer heparin reversal agents.

Purpose of the Study:

To evaluate supercharged polypeptides as potential alternatives to protamine sulfate.
To assess the heparin-neutralizing capacity and safety of these polypeptides.

Main Methods:

Recombinant production of supercharged polypeptides with varying positive charges.
In vitro evaluation of heparin neutralization compared to protamine sulfate.
In vivo studies to assess efficacy in reversing heparin-induced bleeding and toxicity.

Main Results:

Increasing polypeptide positive charges enhanced heparin neutralization and salt resistance.
A 72-charge polypeptide (K72) demonstrated heparin-neutralizing ability comparable to PS.
K72 effectively alleviated heparin-induced bleeding in vivo with minimal toxicity.

Conclusions:

Supercharged polypeptides, particularly K72, represent a promising, safer alternative to protamine sulfate.
These polypeptides could potentially replace protamine sulfate in clinical settings for heparin reversal.