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• W2592181289 abstract "Distinct regulatory signaling mechanisms exist between cortisol and brain derived neurotrophic factor (BDNF) that may influence secondary injury cascades associated with traumatic brain injury (TBI) and predict outcome. We investigated concurrent CSF BDNF relationships with CSF cortisol in 117 patients sampled days 0-6 after severe TBI while accounting for BDNF genetics and age; relationships were assessed for associations with 6-month mortality. BDNF variants, rs6265 and rs7124442, were used to create a gene risk score (GRS) in reference to previously published hypothesized risk for mortality in “younger patients” (<48 years) and hypothesized BDNF production/secretion capacity with these variants. Group based trajectory analysis (TRAJ) was used to create patient cortisol groupings. A Bayesian estimation approach informed the mediation models. Results show CSF BDNF predicted patient cortisol TRAJ group (P=0.001). Also, GRS moderated BDNF associations with cortisol TRAJ group. Additionally, cortisol TRAJ predicted 6-month mortality (P=<0.001). In mediation analysis, BDNF predicted mortality, with cortisol acting as the mediator (P=0.011), yielding a mediation percentage of 29.92%. Mediation effects increased to 45.45% among younger patients. A BDNF*GRS interaction predicted mortality in younger patients (P=0.004). Thus, we conclude 6-month mortality after severe TBI can be predicted through a mediation model with CSF cortisol and BDNF, suggesting a regulatory role for cortisol with BDNF’s contribution to TBI pathophysiology and mortality, particularly among younger patients with severe TBI. Based on the literature, cortisol modulated BDNF effects on mortality after TBI may be related to known hormone and neurotrophin relationships to neurological injury severity and autonomic nervous system imbalance." @default.
• W2592181289 created "2017-03-16" @default.
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• W2592181289 date "2017-03-09" @default.
• W2592181289 modified "2023-10-15" @default.
• W2592181289 title "Cerebrospinal Fluid Cortisol Mediates Brain-Derived Neurotrophic Factor Relationships to Mortality after Severe TBI: A Prospective Cohort Study" @default.
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• W2592181289 doi "https://doi.org/10.3389/fnmol.2017.00044" @default.
• W2592181289 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5343043" @default.
• W2592181289 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28337122" @default.
• W2592181289 hasPublicationYear "2017" @default.
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