scholarly journals Depression in multiple sclerosis: effect of brain derived neurotrophic factor Val66Met polymorphism and disease perception

2019 ◽  
Vol 26 (5) ◽  
pp. 830-830
Keyword(s):  
Multiple Sclerosis ◽  
Neurotrophic Factor ◽  
Brain Derived Neurotrophic Factor ◽  
Val66met Polymorphism ◽  
Disease Perception

No association of the Val66Met polymorphism of brain-derived neurotrophic factor (BDNF) to multiple sclerosis

2006 ◽  
Vol 396 (3) ◽  
pp. 217-219 ◽  
Author(s):  
Y. Blanco ◽  
M. Gómez-Choco ◽  
J.L. Arostegui ◽  
B. Casanova ◽  
J.E. Martínez-Rodríguez ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Neurotrophic Factor ◽  
Brain Derived Neurotrophic Factor ◽  
Val66met Polymorphism

scholarly journals The Brain-Derived Neurotrophic Factor Val66Met Polymorphism Can Protect Against Cognitive Impairment in Multiple Sclerosis

2021 ◽  
Vol 12 ◽  
Author(s):  
Emilio Portaccio ◽  
Angelo Bellinvia ◽  
Elio Prestipino ◽  
Benedetta Nacmias ◽  
Silvia Bagnoli ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Cognitive Impairment ◽  
Neurotrophic Factor ◽  
Multivariable Analysis ◽  
Brain Derived Neurotrophic Factor ◽  
Bdnf Expression ◽  
Val66met Polymorphism ◽  
Bdnf Val66met Polymorphism ◽  
Edss Score

Introduction: Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin family, involved in neuronal survival and synaptic plasticity. The BDNF Val66Met polymorphism is known to reduce BDNF expression and secretion; its role in multiple sclerosis (MS) is poorly investigated.Objectives and Methods: In this multicenter, retrospective study, we assessed the role of BDNF Val66Met polymorphism on cognitive and motor disability in MS patients consecutively referred to the University of Florence and the Hospital of Barletta. All patients underwent a genetic analysis for the presence of Val66Met polymorphism and a comprehensive neuropsychological examination on the Rao's Brief Repeatable Battery and the Stroop Color Word Test. Possible predictors of the Expanded Disability Status Scale (EDSS) score and number of failed neuropsychological tests were assessed through linear multivariable regression models.Results: Ninety-eight patients were recruited. Patients with the BDNF Val66Met polymorphism (35.7%) were more frequently males (p = 0.020), more disabled (p = 0.026) and, marginally, older (p = 0.064). In the multivariable analysis, BDNF Val66Met polymorphism was associated with a better cognitive performance (B = −1.1 ± 0.5, p = 0.027). Higher EDSS score was associated with a progressive disease course (B = 3.4, p < 0.001) and, marginally, with the presence of the BDNF Val66Met polymorphism (B = 0.56, p = 0.066).Discussion: Our results preliminarily suggest a protective role of BDNF Val66Met polymorphism against cognitive impairment in MS patients, possibly related to a detrimental effect of increased BDNF concentration in a neuroinflammatory environment.

The Influence of Val66Met Polymorphism in Brain-Derived Neurotrophic Factor on Stroke Recovery Outcome: A Systematic Review and Meta-analysis

2021 ◽  
pp. 154596832110141
Author(s):  
Xuan Liu ◽  
Jun-Chao Fang ◽  
Xin-Yue Zhi ◽  
Qiu-Yu Yan ◽  
Hong Zhu ◽  
...  
Keyword(s):  
Neurotrophic Factor ◽  
Genetic Model ◽  
Meta Analysis ◽  
Brain Derived Neurotrophic Factor ◽  
Recessive Model ◽  
Stroke Recovery ◽  
Stroke Severity ◽  
Val66met Polymorphism ◽  
Asian Patients ◽  
Caucasian Patients

Background and purpose. A single nucleotide polymorphism at nucleotide 196 (G/A) in the human brain-derived neurotrophic factor ( BDNF) gene produces an amino acid substitution (valine to methionine) at codon 66(Val66Met). It is unclear whether carriers of this substitution may have worse functional outcomes after stroke. We aimed to explore the distribution of Val66Met polymorphism and evaluate the effect of different genotypes on stroke functional recovery. Methods. Several databases were searched using the keywords BDNF or brain-derived neurotrophic factor, codon66, G196A, rs6265, or Val66Met, and stroke. Results. A total of 25 articles were relevant to estimate the distribution of alleles; 5 reports were applied in the meta-analysis to assess genetic differences on recovery outcomes. The genetic model analysis showed that the recessive model should be used; we combined data for AA versus GA+GG (GG—Val/Val, GA—Val/Met, AA—Met/Met). The results showed that stroke patients with AA might have worse recovery outcomes than those with GA+GG (odds ratio = 1.90; 95% CI: 1.17-3.10; P = .010; I2 = 69.2%). Overall, the A allele may be more common in Asian patients (48.6%; 95% CI: 45.8%-51.4%, I2 = 54.2%) than Caucasian patients (29.8%; 95% CI: 7.5%-52.1%; I2 = 99.1%). However, in Caucasian patients, the frequency of the A allele in Iranians (87.9%; 95% CI: 83.4%-92.3%) was quite higher than that in other Caucasians (18.7%; 95% CI: 16.6%-20.9%; I2 = 0.00%). Conclusion. Val66Met AA carriers may have worse rehabilitation outcomes than GA+GG carriers. Further studies are needed to determine the effect of Val66Met polymorphism on stroke recovery and to evaluate this relationship with ethnicity, sex, age, stroke type, observe duration, stroke severity, injury location, and therapies.

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