Missense Mutation of Brain Derived Neurotrophic Factor BDNF Alters Neurocognitive Performance in Patients with Mild Traumatic Brain Injury: A Longitudinal StudyReportar como inadecuado




Missense Mutation of Brain Derived Neurotrophic Factor BDNF Alters Neurocognitive Performance in Patients with Mild Traumatic Brain Injury: A Longitudinal Study - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

The predictability of neurocognitive outcomes in patients with traumatic brain injury is not straightforward. The extent and nature of recovery in patients with mild traumatic brain injury mTBI are usually heterogeneous and not substantially explained by the commonly known demographic and injury-related prognostic factors despite having sustained similar injuries or injury severity. Hence, this study evaluated the effects and association of the Brain Derived Neurotrophic Factor BDNF missense mutations in relation to neurocognitive performance among patients with mTBI. 48 patients with mTBI were prospectively recruited and MRI scans of the brain were performed within an average 10.1 SD 4.2 hours post trauma with assessment of their neuropsychological performance post full Glasgow Coma Scale GCS recovery. Neurocognitive assessments were repeated again at 6 months follow-up. The paired t-test, Cohen’s d effect size and repeated measure ANOVA were performed to delineate statistically significant differences between the groups wildtype G allele Val homozygotes vs. minor A allele Met carriers and their neuropsychological performance across the time point T1 = baseline- admission vs. T2 = 6th month follow-up. Minor A allele carriers in this study generally performed more poorly on neuropsychological testing in comparison wildtype G allele group at both time points. Significant mean differences were observed among the wildtype group in the domains of memory M = -11.44, SD = 10.0, p = .01, d = 1.22, executive function M = -11.56, SD = 11.7, p = .02, d = 1.05 and overall performance M = -6.89 SD = 5.3, p = .00, d = 1.39, while the minor A allele carriers showed significant mean differences in the domains of attention M = -11.0, SD = 13.1, p = .00, d = .86 and overall cognitive performance M = -5.25, SD = 8.1, p = .01, d = .66.The minor A allele carriers in comparison to the wildtype G allele group, showed considerably lower scores at admission and remained impaired in most domains across the timepoints, although delayed signs of recovery were noted to be significant in the domains attention and overall cognition. In conclusion, the current study has demonstrated the role of the BDNF rs6265 Val66Met polymorphism in influencing specific neurocognitive outcomes in patients with mTBI. Findings were more detrimentally profound among Met allele carriers.



Autor: Vairavan Narayanan , Vigneswaran Veeramuthu , Azlina Ahmad-Annuar, Norlisah Ramli, Vicknes Waran, Karuthan Chinna, Mark William B

Fuente: http://plos.srce.hr/



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