Related Experiment Video
Updated: Aug 6, 2025

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice
Published on: September 30, 2021
The National Hemophilia Foundation State of the Science Research Summit initiative: executive summary
Leonard A Valentino1,2, Michelle L Witkop1, Maria E Santaella1
1National Hemophilia Foundation, New York, NY, USA.
Introduction:
The National Hemophilia Foundation State of the Science Research Summit initiative sought to unify research efforts in the US inherited bleeding disorders (BDs) community around key topics of importance to people living with inherited BDs, the lived experience experts.
Areas Covered:
This community-led and -informed project focused on six broad areas - hemophilia A or B; von Willebrand Disease (VWD), platelet dysfunctions and other mucocutaneous inherited BDs; ultra-rare inherited BDs; the unique challenges of people with the potential to menstruate with inherited BDs; diversity, equity and inclusion, health services research, and implementation science; and facilitating research in the inherited BD community through designing an optimizied research infrastructure, enabling resources and funding, and furthering workforce capabilities required to execute the research priorities.
Expert Opinion:
The work summarized here, and in the accompanying supplement manuscripts , has implications not only for the US population but for people globally who have inherited BDs. The information is equally relevant to people living with hemophilia, VWD, the spectrum of inherited platelet disorders, ultra-rare factor deficiencies, and all other inherited BDs as it is to the health care providers and researchers focused on the care and treatment of inherited BDs in the US and globally.
Related Concept Videos
Genome-wide Association Studies-GWAS
GWAS does not require the identification of the target gene involved in...
Introduction to Hemostasis
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
Disorders of Hemostasis
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Clot Retraction and Fibrinolysis
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...

