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Status unknownNCT05096871Updated Oct 27, 2021

Association of Brain Derived Neurotrophic Factor (BDNF) rs6265 Gene Polymorphism With Susceptibility to Epilepsy

An observational study in Epilepsy, sponsored by Sohag University. Status unknown. Open to participants aged 1 Year to 15 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-10-27.

Sponsored by Sohag University · Observational

The sponsor has not verified this record recently (last verified Oct 2021), so the status shown — last known as Not yet recruiting — may be out of date.
Study type
Observational
Model
Case-control
Time perspective
Cross-sectional
Enrollment
90
Ages
1 Year to 15 Years
Sex
All
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Study summary

Epilepsy is a common neurological condition that affects people of all ages.Recent studies found that epilepsy is associated with several chromosomal regions, where mutations in these regions cause neurological dysfunction.

BDNF which is the most ample neurotropic factor in the CNS, has survival and growth promoting roles in a variety of neurons. It has been shown to promote excitatory (glutamatergic) synapses while weakening inhibitory (GABAergic) ones.

A nonsynonymous G to A single-nucleotide polymorphism (SNP) exists at position 196 of exon 2 (rs6265), which results in valine (val) to methionine (met) substitution. This polymorphism affects intracellular packaging of pro-BDNF, its axonal transport and in turn, activity-dependent secretion of BDNF at the synapse.

Read the detailed description

Epilepsy was defined as the separate occurrence of two or more unprovoked seizures, manifested by involuntary motor, sensory, or autonomic, alone or in combination, and not diagnosed as neonatal or febrile seizures. Despite extensive studies, the molecular causes of the disease are not yet discovered completely. A functional imbalance between excitatory (transmitted by glutamate) and inhibitory signals (transmitted by γ-amino butyric acid or GABA) in neural cells has been regarded as a putative contributing factor in epilepsy.

The brain-derived neurotropic factor (BDNF) encodes a small dimeric protein which is the most ample neurotropic factor in the CNS.It has been shown to promote excitatory (glutamatergic) synapses while weakening inhibitory (GABAergic) ones.Any interference with the BDNF signaling pathway may negatively affect downstream neuronal functions and cause neuronal diseases.

A nonsynonymous G to A single-nucleotide polymorphism (SNP) exists at position 196 of exon 2 (rs6265), which results in valine (val) to methionine (met) substitution at codon 66 (val66met), changing the 5' proregion of the human BDNF protein. This polymorphism affects intracellular packaging of pro-BDNF, its axonal transport and in turn, activity-dependent secretion of BDNF at the synapse

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Conditions studied

  • Epilepsy

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Keywords

  • BDNF in epileptic patients
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In context

Epilepsy

1,805 studies on the registry are indexed under Epilepsy; 417 are open to participants now.

This study's planned enrollment of 90 is below the median of 102 across 521 observational studies indexed under Epilepsy.

Browse Epilepsy studies →

Lead sponsor

Sohag University is the lead sponsor of 1,183 studies on the registry; 612 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
1 Year to 15 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

Patients with epilepsy aged from 1 year to less than 15 years, in Pediatric department of Sohag University Hospital and healthy control children of matched age and sex

Inclusion criteria

  • Epileptic patients aged more than 1 year and less than 15 year who recently had seizures over a period of one year

Exclusion criteria

Exclusion Criteria:

  • Patients > 15 years old or less than 1 year.
  • Patients that have epilepsy as a result of head injuries, brain tumors , exposure to low oxygen during birth or infections such as meningitis or encephalitis .
  • Patients that have no sufficient medical records or unreliable seizure frequency,
  • patients with developmental disorders such as Autism and Neurofibromatosis
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Study design

Observational model
Case-control
Time perspective
Cross-sectional
Enrollment
90 participants (estimated)
Patient registry
No

Groups and cohorts

  • Group I

    patients with epilepsy

    Genetic: Genotyping by Real Time PCR

  • Group II

    apparently healthy controls with no chronic illness of matched age and sex

    Genetic: Genotyping by Real Time PCR

Interventions

  • GeneticGenotyping by Real Time PCR

    3 mL of blood will be withdrawn by venipuncture in EDTA tube. DNA extraction will be done after centrifugation and used for genotyping assay of ( BDNF ) gene with the Real- time polymerase chain reaction. BDNF level in serum will also be analyzed by Sandwich enzyme linked immunosorbant assay kit ( ELISA).

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What researchers measure

Primary outcomes

  1. Iinvestigate the possible association between BDNF rs6265 polymorphism and epilepsy susceptibility in Egyptian patients

    Genotyping assay of ( BDNF ) rs6265 gene polymorphism by the Real- time polymerase chain reaction.

    Time frame: within 3 days after collection of samples

Secondary outcomes

  1. Assess the utility of serum BDNF concentration as a diagnostic tool for Epilepsy and evaluate its relationship with disease severity

    Measurement BDNF level in serum by Sandwich enzyme linked immunosorbant assay kit

    Time frame: within 3 days after collection of samples

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Study locations

No study locations are listed for this record.

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References and documents

Publications

  • Egan MF, Kojima M, Callicott JH, Goldberg TE, Kolachana BS, Bertolino A, Zaitsev E, Gold B, Goldman D, Dean M, Lu B, Weinberger DR. The BDNF val66met polymorphism affects activity-dependent secretion of BDNF and human memory and hippocampal function. Cell. 2003 Jan 24;112(2):257-69. doi: 10.1016/s0092-8674(03)00035-7. PubMed 12553913 ↗
  • Chen ZY, Patel PD, Sant G, Meng CX, Teng KK, Hempstead BL, Lee FS. Variant brain-derived neurotrophic factor (BDNF) (Met66) alters the intracellular trafficking and activity-dependent secretion of wild-type BDNF in neurosecretory cells and cortical neurons. J Neurosci. 2004 May 5;24(18):4401-11. doi: 10.1523/JNEUROSCI.0348-04.2004. PubMed 15128854 ↗
  • Fisher RS, Acevedo C, Arzimanoglou A, Bogacz A, Cross JH, Elger CE, Engel J Jr, Forsgren L, French JA, Glynn M, Hesdorffer DC, Lee BI, Mathern GW, Moshe SL, Perucca E, Scheffer IE, Tomson T, Watanabe M, Wiebe S. ILAE official report: a practical clinical definition of epilepsy. Epilepsia. 2014 Apr;55(4):475-82. doi: 10.1111/epi.12550. Epub 2014 Apr 14. PubMed 24730690 ↗
  • Loscher W, Potschka H, Sisodiya SM, Vezzani A. Drug Resistance in Epilepsy: Clinical Impact, Potential Mechanisms, and New Innovative Treatment Options. Pharmacol Rev. 2020 Jul;72(3):606-638. doi: 10.1124/pr.120.019539. PubMed 32540959 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 27, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT05096871
Lead sponsor
Sohag University
Responsible party
Salma Khalaf Abdelmageed (demonstrator of Medical Biochemistry, Sohag University) — Principal investigator
First posted
Oct 27, 2021
Start date
Nov 1, 2021 (estimated)
Primary completion
Nov 1, 2022 (estimated)
Completion
Dec 1, 2022 (estimated)
Last update
Oct 27, 2021

Study contacts

Salma K Abdelmageed, demonstrator
Contact
salma011101@med.sohag.edu.eg
01091285241

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Oct 2021. You cannot join it, but the record below documents what was studied.

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