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Current and future antithrombotic agents in children
1Children's Hospital of Orange County, 455 S. Main Street, Orange, CA 92868, USA. gyoung@choc.org
Insights
Pediatric thromboembolic events are rising, prompting increased anticoagulation use. Novel agents like direct thrombin inhibitors offer potential advantages over traditional heparin and warfarin for children.
Area of Science:
- Pediatric Hematology
- Pharmacology
- Thrombosis Management
Background:
- Increasing incidence of thromboembolic complications in pediatric patients.
- Expanded use of anticoagulation in children without robust clinical trial data.
- Limitations of traditional anticoagulants (heparin, warfarin) in pediatric populations.
Purpose of the Study:
- Review current and novel anticoagulation agents for pediatric use.
- Highlight potential advantages of newer agents over established therapies.
- Discuss the role of emerging anticoagulants in managing pediatric thrombosis.
Main Methods:
- Literature review of anticoagulation therapies in children.
- Analysis of pharmacologic properties of heparin, low-molecular-weight heparin, direct thrombin inhibitors, and Factor Xa inhibitors.
- Examination of ongoing clinical trials for novel agents.
Main Results:
- Heparin and warfarin are common but have limitations in children.
- Low-molecular-weight heparin offers improved properties.
- Novel agents like direct thrombin inhibitors (argatroban, bivalirudin) and fondaparinux show promise but require further study.
Conclusions:
- Novel anticoagulants present potential benefits for pediatric thrombosis.
- Further research and clinical trials are essential to define optimal use and dosing in children.
- Emerging agents may offer safer and more effective anticoagulation strategies for pediatric patients.
Abstract:
Thromboembolic complications are increasing in children, and the use of anticoagulation has seen a dramatic increase despite the lack of randomized clinical trials. The most widely used agents in children are heparin and warfarin, however these agents have limitations that are exaggerated in children. This has led to the use of newer agents with improved pharmacologic properties such as low-molecular-weight heparin, however, the use of novel agents such as direct thrombin inhibitors has been limited to case reports. These agents, however, have potential advantages over heparin, low-molecular-weight heparin and warfarin. Current clinical trials are in progress to define the proper dose of two such agents--argatroban (Argatroban, GlaxoSmithKline) and bivalirudin (Angiomax, The Medicines Company). The selective Factor Xa inhibitor fondaparinux (Arixtra, Sanofi-Synthelabo) has not been used in children; however, there are situations in which this agent may be advantageous. This review will discuss the currently available agents, with an emphasis on those that are novel and their potential uses in children.
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