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Effect of the Presence of Brain-Derived Neurotrophic Factor Val66Met Polymorphism on the Recovery in Patients With Acute Subcortical Stroke

박혜경|신준호|박경운|백남종|임종엽|김원석|Samuel Arnado Tan
대한재활의학회 (Korean Academy Of Rehabilitation Medicine)|2013.06|Annals of Rehabilitation Medicine|제37권 제3호|pp. 311-319

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참고문헌

키워드

RecoveryStrokeBrain-derived neurotrophic factorPolymorphismBrain plasticity
주제분류재활의학

초록

Objective To investigate the effect of brain-derived neurotrophic factor (BDNF) Val66Met polymorphism on the recovery after subcortical stroke, using the modified Rankin Scale (mRS).Methods Subcortical stroke patients with copies of BDNF Val66Met polymorphism (n=7) were compared to their controls (n=7) without a copy of BDNF Val66Met polymorphism after matching for initial severity, location and type of stroke. The mRS scores at 1 and 3 months after discharge from the neurorehabilitation unit were compared between the groups.Results A repeated measures ANOVA for mRS revealed significant interaction between time and group (F(2, 24) =37.2, p<0.001) and a significant effect of time (F(2, 24)=10.8, p<0.001), thereby reflecting significant differences between the Met allele (+) group and the Met allele (-) group. There was a significant difference in mRS scores at 3 months post-discharge between the two groups (p=0.01) although no difference was evident in mRS scores at 1 month post-discharge between the two groups. There were significant improvements between mRS scores on admission and mRS scores at 1 month post-discharge (p=0.02), and between mRS scores at 1 month post-discharge and mRS scores at 3 months post-discharge (p=0.004) in the Met allele (-) group.Conclusion BDNF Val66Met polymorphism may be associated with worse functional outcome in Korean patients with subcortical stroke. Therefore, BDNF Val66Met polymorphism should be considered as an important prognostic factor for recovery and responses to rehabilitation therapies after stroke in Korean patients. There is a need for developing different rehabilitation strategies for the population with BDNF Val66Met polymorphism. Further studies assessing different outcomes for various functional domains of stroke recovery are needed to clarify the role of BDNF Val66Met polymorphism.

Abstract

Objective To investigate the effect of brain-derived neurotrophic factor (BDNF) Val66Met polymorphism on the recovery after subcortical stroke, using the modified Rankin Scale (mRS).Methods Subcortical stroke patients with copies of BDNF Val66Met polymorphism (n=7) were compared to their controls (n=7) without a copy of BDNF Val66Met polymorphism after matching for initial severity, location and type of stroke. The mRS scores at 1 and 3 months after discharge from the neurorehabilitation unit were compared between the groups.Results A repeated measures ANOVA for mRS revealed significant interaction between time and group (F(2, 24) =37.2, p<0.001) and a significant effect of time (F(2, 24)=10.8, p<0.001), thereby reflecting significant differences between the Met allele (+) group and the Met allele (-) group. There was a significant difference in mRS scores at 3 months post-discharge between the two groups (p=0.01) although no difference was evident in mRS scores at 1 month post-discharge between the two groups. There were significant improvements between mRS scores on admission and mRS scores at 1 month post-discharge (p=0.02), and between mRS scores at 1 month post-discharge and mRS scores at 3 months post-discharge (p=0.004) in the Met allele (-) group.Conclusion BDNF Val66Met polymorphism may be associated with worse functional outcome in Korean patients with subcortical stroke. Therefore, BDNF Val66Met polymorphism should be considered as an important prognostic factor for recovery and responses to rehabilitation therapies after stroke in Korean patients. There is a need for developing different rehabilitation strategies for the population with BDNF Val66Met polymorphism. Further studies assessing different outcomes for various functional domains of stroke recovery are needed to clarify the role of BDNF Val66Met polymorphism.

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