Fibrinogen is a protein in the body that plays crucial roles in hemostasis, thrombosis, inflammation, and is frequently used in studies on clot formation, structure, and stability. Once synthesized in the liver, fibrinogen is released into the blood in high concentrations, where it stays with a relatively long half-life. A person’s fibrinogen levels tend to increase with age and is highly responsive to changes in the inflammation state of the person (Wolberg, 2023). Fibrinogen in the blood helps the formation of blood clots to stop bleeding when the body sustains an injury (Fibrinogen blood test, 2025). In this blog post, we’ll look at the various functions of fibrinogen and discuss why it is such an important protein for various research applications.
Wound Healing and Tissue Repair
One of the primary functions of fibrinogen is to help stop bleeding and start recovery after the body sustains an injury. As stated above, the liver produces fibrinogen and secretes it into the blood. Typical concentrations of fibrinogen in the blood range from about 200 to 400 mg/dL (Fibrinogen blood test, 2025). When the body exhibits inflammation, more fibrinogen is produced and released into the blood. Further, if an injury is sustained that causes bleeding, fibrinogen synthesis increases and distinct isoforms and post-translationally modified forms of fibrinogen may be found in circulation. Fibrinogen converts to fibrin during coagulation via thrombin‐mediated proteolytic cleavage, resulting in the production of protofibrils and fibers that add stability to clots (Pieters and Wolberg, 2019).
Because of its important role in inflammation and clot formation, people with disorders that impact on the concentration or function of fibrinogen experience an increased risk of bleeding, thrombosis, and infection (Pieters and Wolberg, 2019). Some factors that may cause low levels of fibrinogen in the body include genetic mutations, liver disease, malnutrition, and cancer. Certain medications can also lower fibrinogen levels in the body. On the flip side, factors such as inflammatory bowel disease, pollution exposure, tissue necrosis, coronary heart disease, stroke, trauma, severe illness, acute infections, dehydration, and more may lead to abnormally high levels of fibrinogen in the body (ODX Research).
Cardiovascular and Immune Function
As stated above, fibrinogen is closely tied to cardiovascular function and research. Elevation of normal fibrinogen concentrations may contribute to a variety of pathological conditions, and have been associated with an increased risk of cardiovascular (CV) disease, coronary artery disease, and stroke. On the other hand, low levels of fibrinogen can lead to spontaneous bleeding disorders and disorders in blood clot formation (Nencini, Giurranna, Borghi, Taddei, Fiorillo, and Becatti, 2025).
Besides wound repair, fibrinogen has deeper ties to normal immune function in the body. When an injury is sustained that damages tissue, fibrinogen is converted to fibrin by thrombin, creating a clot that acts as a scaffold that traps pathogens and allows for platelets, immune cells, fibroblasts, and endothelial cells to latch on and start neutralizing the pathogens and repairing the tissue. When vascular injury is sustained, platelets are among the first immune cells to respond. Fibrinogen acts as a key mediator in platelet aggregation around the site of injury. Once activated, platelets bind to fibrinogen and crosslink to form a stable blood clot. Further, oxidized fibrinogen increases the expression of adhesion molecules within endothelial cells, helping to recruit leukocytes at the wound site (Nencini et al., 2025).
Fibrinogen from Innovative Research
Are you getting ready for a new research project related to fibrinogen function? Maybe you’re studying fibrin specificity, inflammatory disease mechanisms, circulating biomarker levels in mouse models, or protein adsorption behavior on material surfaces. Purified Human Fibrinogen from Innovative Research has been trusted by scientists in applications such as clotting studies, fibrin-focused assay development, thromboinflammation research, and therapeutic programs targeting fibrin-associated pathology.
Perhaps your study focuses on something outside traditional coagulation biology; labeled fibrinogen samples might be the perfect match for your workflow. Researchers used FITC-labeled fibrinogen from Innovative Research to serve as a fluorescent probe for protein adsorption while working on polymer surface treatment and biological fouling. Finally, for those needing to quantify fibrinogen levels in their mouse models, Innovative Research’s Mouse Total Fibrinogen ELISA Kit has been trusted in research workflows around the world.
Fibrinogen is a protein critical for many functions in the body. If you’re researching coagulation, inflammation, homeostasis, wound healing, thrombosis, or similar topics, fibrinogen may be a key sample for your workflow. Purified fibrinogen products support clotting studies, fibrin-focused binding work, fibrinolysis-related assays, thromboelastography, and other classic hemostasis workflows. Are you ready to make your next breakthrough? Innovative Research has the samples you need to empower your workflow and make that next discovery!
Citations
Alisa S. Wolberg, Fibrinogen and fibrin: synthesis, structure, and function in health and disease, Journal of Thrombosis and Haemostasis, Volume 21, Issue 11, 2023, Pages 3005-3015, ISSN 1538-7836, https://doi.org/10.1016/j.jtha.2023.08.014. (https://www.sciencedirect.com/science/article/pii/S1538783623006426)
Fibrinogen blood test. (2025). Ucsfhealth.org. (https://www.ucsfhealth.org/care/medical-tests/fibrinogen-blood-test)
Pieters M, Wolberg AS. Fibrinogen and fibrin: An illustrated review. Res Pract Thromb Haemost. 2019 Mar 4;3(2):161-172. doi: 10.1002/rth2.12191. PMID: 31011700; PMCID: PMC6462751 (https://pmc.ncbi.nlm.nih.gov/articles/PMC6462751/)
ODX Research. Biomarkers of Inflammation: Fibrinogen, Fibrinogen Activity. Optimaldx.com. Published February 21, 2023. Accessed April 9, 2026. (https://www.optimaldx.com/research-blog/fibrinogen)
Nencini F, Giurranna E, Borghi S, Taddei N, Fiorillo C, Becatti M. Fibrinogen Oxidation and Thrombosis: Shaping Structure and Function. Antioxidants (Basel). 2025 Mar 26;14(4):390. doi: 10.3390/antiox14040390. PMID: 40298646; PMCID: PMC12024030 (https://pmc.ncbi.nlm.nih.gov/articles/PMC12024030/)
