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Published on: November 20, 2015
Coagulation, inflammation, and the risk of neonatal white matter damage
1Neuroepidemiology Unit, Children's Hospital and Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA. alan.leviton@tch.harvard.edu
Insights
Elevated coagulation factors in newborns with systemic inflammation may cause cerebral white matter damage by worsening inflammation, not by blocking blood vessels. This suggests new therapeutic targets for preventing brain injury.
Area of Science:
- Biomedical Science
- Neuroscience
- Hematology
Background:
- Systemic inflammation is linked to increased coagulation activation markers in newborns and adults.
- Coagulation factors can worsen inflammation, creating a detrimental cycle.
- Current therapies targeting only coagulation or inflammation have failed to reduce mortality in severe systemic inflammatory response syndrome and multi-organ dysfunction (SIRS/MOD).
Purpose of the Study:
- To investigate the role of activated coagulation factors in neonatal cerebral white matter damage.
- To propose a mechanism by which coagulation contributes to inflammation-induced brain injury in at-risk newborns.
Main Methods:
- Review of existing literature on coagulation, inflammation, and neonatal brain injury.
- Analysis of the relationship between systemic inflammatory response, coagulation factors, and cerebral white matter damage in newborns.
- Comparison of therapeutic outcomes in SIRS/MOD.
Main Results:
- Activated coagulation factors appear to exacerbate inflammation.
- Activated protein C, with both anti-coagulant and anti-inflammatory effects, is the only therapy shown to reduce mortality in SIRS/MOD.
- Newborns at risk for cerebral white matter damage often exhibit systemic inflammation with elevated coagulation factors.
Conclusions:
- Activated coagulation factors likely contribute to neonatal cerebral white matter damage by enhancing inflammatory processes.
- The mechanism is suggested to be inflammation exacerbation rather than direct blood vessel occlusion.
- This understanding may guide novel therapeutic strategies for preventing neonatal brain injury.
Abstract:
Indicators of coagulation activation are sometimes increased in the blood of newborns and adults who have a systemic inflammatory response. These coagulation factors have the ability to exacerbate inflammation, which in turn can promote coagulation. Therapies directed solely at coagulation factors and therapies directed solely at inflammation factors have not proved effective in reducing mortality in adults with a systemic inflammatory response syndrome and multi-organ dysfunction (SIRS/MOD). On the other hand, the only therapy that has reduced mortality in SIRS/MOD is activated protein C, which has both anti-coagulation and anti-inflammatory effects. This and other observations support the view that activated coagulation factors enhance inflammation. Since newborns at risk of cerebral white matter damage and cerebral palsy are more likely than their peers to have a systemic inflammatory response, which is sometimes accompanied by elevated blood levels of coagulation factors, we suggest that activated coagulation factors contribute to the occurrence of cerebral white matter damage by exacerbating inflammatory phenomena, rather than by occluding cerebral blood vessels.
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