BDNF Val66Met polymorphism alters spinal DC stimulation-induced plasticity in humans

The brain-derived neurotrophic factor gene (BDNF) is one of many genes thought to influence neuronal survival, synaptic plasticity, and neurogenesis. A common single nucleotide polymorphism (SNP) of the BDNF gene due to valine-to-methionine substitution at codon 66 (BDNF Val66Met) in the normal popu...

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Published inJournal of neurophysiology Vol. 110; no. 1; pp. 109 - 116
Main Authors Lamy, Jean-Charles, Boakye, Maxwell
Format Journal Article
LanguageEnglish
Published United States 01.07.2013
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Online AccessGet full text
ISSN0022-3077
1522-1598
1522-1598
DOI10.1152/jn.00116.2013

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Abstract The brain-derived neurotrophic factor gene (BDNF) is one of many genes thought to influence neuronal survival, synaptic plasticity, and neurogenesis. A common single nucleotide polymorphism (SNP) of the BDNF gene due to valine-to-methionine substitution at codon 66 (BDNF Val66Met) in the normal population has been associated with complex neuronal phenotype, including differences in brain morphology, episodic memory, or cortical plasticity following brain stimulation and is believed to influence synaptic changes following motor learning task. However, the effect of this polymorphism on spinal plasticity remains largely unknown. Here, we used anodal transcutaneous spinal direct current stimulation (tsDCS), a novel noninvasive technique that induces plasticity of spinal neuronal circuits in healthy subjects. To investigate whether the susceptibility of tsDCS probes of spinal plasticity is significantly influenced by BDNF polymorphism, we collected stimulus-response curves of the soleus (Sol) H reflex before, during, at current offset, and 15 min after anodal tsDCS delivered at Th11 (2.5 mA, 15 min, 0.071 mA/cm 2 , and 64 mC/cm 2 ) in 17 healthy, Met allele carriers and 17 Val homozygotes who were matched for age and sex. Anodal tsDCS induced a progressive leftward shift of recruitment curve of the H reflex during the stimulation that persisted for at least 15 min after current offset in Val/Val individuals. In contrast, this shift was not observed in Met allele carriers. Our findings demonstrate for the first time that the BDNF Val66Met genotype impacts spinal plasticity in humans, as assessed by tsDCS, and may be one factor influencing the natural response of the spinal cord to injury or disease.
AbstractList The brain-derived neurotrophic factor gene (BDNF) is one of many genes thought to influence neuronal survival, synaptic plasticity, and neurogenesis. A common single nucleotide polymorphism (SNP) of the BDNF gene due to valine-to-methionine substitution at codon 66 (BDNF Val66Met) in the normal population has been associated with complex neuronal phenotype, including differences in brain morphology, episodic memory, or cortical plasticity following brain stimulation and is believed to influence synaptic changes following motor learning task. However, the effect of this polymorphism on spinal plasticity remains largely unknown. Here, we used anodal transcutaneous spinal direct current stimulation (tsDCS), a novel noninvasive technique that induces plasticity of spinal neuronal circuits in healthy subjects. To investigate whether the susceptibility of tsDCS probes of spinal plasticity is significantly influenced by BDNF polymorphism, we collected stimulus-response curves of the soleus (Sol) H reflex before, during, at current offset, and 15 min after anodal tsDCS delivered at Th11 (2.5 mA, 15 min, 0.071 mA/cm(2), and 64 mC/cm(2)) in 17 healthy, Met allele carriers and 17 Val homozygotes who were matched for age and sex. Anodal tsDCS induced a progressive leftward shift of recruitment curve of the H reflex during the stimulation that persisted for at least 15 min after current offset in Val/Val individuals. In contrast, this shift was not observed in Met allele carriers. Our findings demonstrate for the first time that the BDNF Val66Met genotype impacts spinal plasticity in humans, as assessed by tsDCS, and may be one factor influencing the natural response of the spinal cord to injury or disease.The brain-derived neurotrophic factor gene (BDNF) is one of many genes thought to influence neuronal survival, synaptic plasticity, and neurogenesis. A common single nucleotide polymorphism (SNP) of the BDNF gene due to valine-to-methionine substitution at codon 66 (BDNF Val66Met) in the normal population has been associated with complex neuronal phenotype, including differences in brain morphology, episodic memory, or cortical plasticity following brain stimulation and is believed to influence synaptic changes following motor learning task. However, the effect of this polymorphism on spinal plasticity remains largely unknown. Here, we used anodal transcutaneous spinal direct current stimulation (tsDCS), a novel noninvasive technique that induces plasticity of spinal neuronal circuits in healthy subjects. To investigate whether the susceptibility of tsDCS probes of spinal plasticity is significantly influenced by BDNF polymorphism, we collected stimulus-response curves of the soleus (Sol) H reflex before, during, at current offset, and 15 min after anodal tsDCS delivered at Th11 (2.5 mA, 15 min, 0.071 mA/cm(2), and 64 mC/cm(2)) in 17 healthy, Met allele carriers and 17 Val homozygotes who were matched for age and sex. Anodal tsDCS induced a progressive leftward shift of recruitment curve of the H reflex during the stimulation that persisted for at least 15 min after current offset in Val/Val individuals. In contrast, this shift was not observed in Met allele carriers. Our findings demonstrate for the first time that the BDNF Val66Met genotype impacts spinal plasticity in humans, as assessed by tsDCS, and may be one factor influencing the natural response of the spinal cord to injury or disease.
The brain-derived neurotrophic factor gene (BDNF) is one of many genes thought to influence neuronal survival, synaptic plasticity, and neurogenesis. A common single nucleotide polymorphism (SNP) of the BDNF gene due to valine-to-methionine substitution at codon 66 (BDNF Val66Met) in the normal population has been associated with complex neuronal phenotype, including differences in brain morphology, episodic memory, or cortical plasticity following brain stimulation and is believed to influence synaptic changes following motor learning task. However, the effect of this polymorphism on spinal plasticity remains largely unknown. Here, we used anodal transcutaneous spinal direct current stimulation (tsDCS), a novel noninvasive technique that induces plasticity of spinal neuronal circuits in healthy subjects. To investigate whether the susceptibility of tsDCS probes of spinal plasticity is significantly influenced by BDNF polymorphism, we collected stimulus-response curves of the soleus (Sol) H reflex before, during, at current offset, and 15 min after anodal tsDCS delivered at Th11 (2.5 mA, 15 min, 0.071 mA/cm(2), and 64 mC/cm(2)) in 17 healthy, Met allele carriers and 17 Val homozygotes who were matched for age and sex. Anodal tsDCS induced a progressive leftward shift of recruitment curve of the H reflex during the stimulation that persisted for at least 15 min after current offset in Val/Val individuals. In contrast, this shift was not observed in Met allele carriers. Our findings demonstrate for the first time that the BDNF Val66Met genotype impacts spinal plasticity in humans, as assessed by tsDCS, and may be one factor influencing the natural response of the spinal cord to injury or disease.
The brain-derived neurotrophic factor gene (BDNF) is one of many genes thought to influence neuronal survival, synaptic plasticity, and neurogenesis. A common single nucleotide polymorphism (SNP) of the BDNF gene due to valine-to-methionine substitution at codon 66 (BDNF Val66Met) in the normal population has been associated with complex neuronal phenotype, including differences in brain morphology, episodic memory, or cortical plasticity following brain stimulation and is believed to influence synaptic changes following motor learning task. However, the effect of this polymorphism on spinal plasticity remains largely unknown. Here, we used anodal transcutaneous spinal direct current stimulation (tsDCS), a novel noninvasive technique that induces plasticity of spinal neuronal circuits in healthy subjects. To investigate whether the susceptibility of tsDCS probes of spinal plasticity is significantly influenced by BDNF polymorphism, we collected stimulus-response curves of the soleus (Sol) H reflex before, during, at current offset, and 15 min after anodal tsDCS delivered at Th11 (2.5 mA, 15 min, 0.071 mA/cm 2 , and 64 mC/cm 2 ) in 17 healthy, Met allele carriers and 17 Val homozygotes who were matched for age and sex. Anodal tsDCS induced a progressive leftward shift of recruitment curve of the H reflex during the stimulation that persisted for at least 15 min after current offset in Val/Val individuals. In contrast, this shift was not observed in Met allele carriers. Our findings demonstrate for the first time that the BDNF Val66Met genotype impacts spinal plasticity in humans, as assessed by tsDCS, and may be one factor influencing the natural response of the spinal cord to injury or disease.
Author Lamy, Jean-Charles
Boakye, Maxwell
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  organization: Centre de la Sensorimotricité, Centre National de la Recherche Scientifique Unité Mixte de Recherche 8194, Université Paris Descartes, Sorbonne Paris Cité, Unité de Formation et de Recherche Biomédicale, Paris, France;, Spinal Cord and Brain Injury Research Laboratory, Center for Advanced Neurosurgery, Department of Neurosurgery, University of Louisville, Louisville, Kentucky; and
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  organization: Spinal Cord and Brain Injury Research Laboratory, Center for Advanced Neurosurgery, Department of Neurosurgery, University of Louisville, Louisville, Kentucky; and, Robley Rex Veterans Affairs Medical Center, Louisville, Kentucky
BackLink https://www.ncbi.nlm.nih.gov/pubmed/23576701$$D View this record in MEDLINE/PubMed
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Snippet The brain-derived neurotrophic factor gene (BDNF) is one of many genes thought to influence neuronal survival, synaptic plasticity, and neurogenesis. A common...
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SubjectTerms Adult
Brain-Derived Neurotrophic Factor - genetics
Brain-Derived Neurotrophic Factor - physiology
Female
Humans
Male
Muscle, Skeletal - physiology
Neuronal Plasticity - genetics
Neuronal Plasticity - physiology
Polymorphism, Genetic
Reflex - genetics
Reflex - physiology
Spinal Cord - physiology
Transcutaneous Electric Nerve Stimulation
Title BDNF Val66Met polymorphism alters spinal DC stimulation-induced plasticity in humans
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