PRIMARY OBJECTIVE: The influence of apolipoprotein (APOE) on neuropsychological outcome was investigated in 19 patients (25.79 ± 7.22 years) with mild-to-moderate traumatic brain injury and 14 matched healthy control subjects (27.43 ± 6.65 years). RESEARCH DESIGN: Within- and between-group comparisons were employed. METHODS AND PROCEDURE: APOE genotype was determined using the Polymerase Chain Reaction-Restriction Fragment Length Polymorphism method. Verbal learning and memory, speed of processing and executive function were assessed at 6 weeks and 6 months post-injury. A three-way [Group*Type*Time] ANOVA with repeated measures on the third factor was employed to determine the differences between groups and APOE genotype. MAIN OUTCOMES AND RESULTS: No Group*APOE Genotype*Time interaction was found for all neuropsychological measures, Auditory Verbal Learning Test (p = 0.484, η(2 )= 0.017), Trail Making Test-B (p = 0.454, η(2 )= 0.019), Controlled Oral Word Association (p = 0.107, η(2 )= 0.087) and Wisconsin Card Sorting Test-64 (p = 0.291, η(2 )= 0.038). The results of this pilot study support earlier findings that showed no relationship between APOE ε4 and poor recovery in the same population. CONCLUSION: The preliminary findings suggest no clear APOE genotype influence on neuropsychological outcome in mild and moderate TBI patients. Large-scale studies with longer follow-up duration are warranted.
PRIMARY OBJECTIVE: The influence of apolipoprotein (APOE) on neuropsychological outcome was investigated in 19 patients (25.79 ± 7.22 years) with mild-to-moderate traumatic brain injury and 14 matched healthy control subjects (27.43 ± 6.65 years). RESEARCH DESIGN: Within- and between-group comparisons were employed. METHODS AND PROCEDURE: APOE genotype was determined using the Polymerase Chain Reaction-Restriction Fragment Length Polymorphism method. Verbal learning and memory, speed of processing and executive function were assessed at 6 weeks and 6 months post-injury. A three-way [Group*Type*Time] ANOVA with repeated measures on the third factor was employed to determine the differences between groups and APOE genotype. MAIN OUTCOMES AND RESULTS: No Group*APOE Genotype*Time interaction was found for all neuropsychological measures, Auditory Verbal Learning Test (p = 0.484, η(2 )= 0.017), Trail Making Test-B (p = 0.454, η(2 )= 0.019), Controlled Oral Word Association (p = 0.107, η(2 )= 0.087) and Wisconsin Card Sorting Test-64 (p = 0.291, η(2 )= 0.038). The results of this pilot study support earlier findings that showed no relationship between APOE ε4 and poor recovery in the same population. CONCLUSION: The preliminary findings suggest no clear APOE genotype influence on neuropsychological outcome in mild and moderate TBI patients. Large-scale studies with longer follow-up duration are warranted.
Authors: Kevin R Krull; Deepa Bhojwani; Heather M Conklin; Deqing Pei; Cheng Cheng; Wilburn E Reddick; John T Sandlund; Ching-Hon Pui Journal: J Clin Oncol Date: 2013-05-06 Impact factor: 44.544
Authors: Charles A McFadyen; Frederick A Zeiler; Virginia Newcombe; Anneliese Synnot; Ewout Steyerberg; Russel L Gruen; Jonathan Rosand; Aarno Palotie; Andrew I R Maas; David K Menon Journal: J Neurotrauma Date: 2019-09-17 Impact factor: 5.269