Thrombosis in inflammatory bowel diseases: what's the link?
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Martina Giannotta1, Gherardo Tapete1, Giacomo Emmi2
1Gastroenterology Department, AOU Careggi Regional Referral Center for Inflammatory Bowel Disease, Florence, Italy.
Insights
Inflammatory bowel disease (IBD) patients face a threefold higher risk of blood clots (thromboembolic events) compared to the general population. Research is exploring various factors, including coagulation and immune abnormalities, to understand this increased risk.
Area of Science:
- Gastroenterology
- Hematology
- Immunology
Background:
- Inflammatory bowel disease (IBD) impacts over 2 million Europeans, with 20% diagnosed in childhood.
- IBD patients exhibit a significantly increased risk of thromboembolic complications, impacting morbidity and mortality.
- Deep venous thrombosis and pulmonary embolism risk are threefold higher in IBD patients, occurring at younger ages than in the general population.
Purpose of the Study:
- To investigate the pro-thrombotic tendency in patients with inflammatory bowel disease.
- To explore potential causes, including genetic, immune, and coagulation abnormalities.
- To review the role of platelets and microvascular endothelium in linking inflammation and hemostasis.
Main Methods:
- Review of existing literature on thromboembolic events in IBD.
- Analysis of studies investigating coagulation cascade, natural inhibitors, and fibrinolytic system.
- Examination of recent research on platelet and microvascular endothelium involvement.
Main Results:
- IBD is associated with a threefold increased risk of thromboembolic events, including deep venous thrombosis and pulmonary embolism.
- Both quantitative and qualitative alterations in coagulation cascade, natural inhibitors, and fibrinolytic system components have been observed.
- Platelets and microvascular endothelium are emerging as potential links between the inflammatory and hemostatic processes in IBD.
Conclusions:
- The pro-thrombotic tendency in IBD is multifactorial, with no single cause identified.
- Abnormalities in hemostasis and immune dysregulation contribute to increased thromboembolic risk in IBD patients.
- Further research into the interplay between inflammation, platelets, and endothelium is crucial for understanding and managing IBD-associated thrombosis.
Abstract:
Inflammatory bowel disease affects more than 2 million people in Europe, with almost 20% of patients being diagnosed in pediatric age. Patients with inflammatory bowel disease are at increased risk of thromboembolic complications which may affect patients' morbidity and mortality. The risk of the most common thromboembolic events, such as deep venous thrombosis and pulmonary embolism, are estimated to be three-fold increased compared to controls, but many other districts can be affected. Moreover, patients with ulcerative colitis and Crohn's disease experience thromboembolic events at a younger age compared to general population. Many factors have been investigated as determinants of the pro-thrombotic tendency such as acquired risk factors or genetic and immune abnormalities, but a unique cause has not been found. Many efforts have been focused on the study of abnormalities in the coagulation cascade, its natural inhibitors and the fibrinolytic system components and both quantitative and qualitative alterations have been demonstrated. Recently the role of platelets and microvascular endothelium has been reviewed, as the possible link between the inflammatory and hemostatic process.
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