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Published on: November 30, 2015
Tryptophan hydroxylase 2 gene polymorphisms and poststroke anxiety disorders
Song Chi1, Lei Teng, Jing-Hui Song
1Department of Neurology, The Affiliated Hospital of Medical College, Qingdao University, No 16, Jiangsu Road, Qingdao, Shandong Province 266003, China.
Genetic variations in the tryptophan hydroxylase 2 (TPH2) gene are linked to post-stroke anxiety in the Han Chinese population. Specifically, the rs4570625 polymorphism increases anxiety risk, particularly in females.
Area of Science:
- Neuroscience
- Genetics
- Psychiatry
Background:
- Anxiety is a frequent complication for stroke survivors, potentially hindering recovery.
- Tryptophan hydroxylase 2 (TPH2) gene polymorphisms are implicated in anxiety and affective disorders.
- Investigating TPH2 gene variants offers insight into the biological underpinnings of post-stroke anxiety.
Purpose of the Study:
- To examine the association between two TPH2 gene polymorphisms (rs4570625 and rs4565946) and post-stroke anxiety.
- To determine if specific TPH2 genotypes or alleles correlate with an increased risk of anxiety after stroke.
- To explore potential sex-specific differences in the TPH2 gene's association with post-stroke anxiety.
Main Methods:
- A case-control study involving 112 post-stroke anxiety patients and 246 non-anxious controls.
- Participants were assessed using the Hamilton Anxiety Rating Scale.
- DNA analysis was performed to genotype the rs4570625 and rs4565946 polymorphisms within the TPH2 gene.
Main Results:
- The G allele of the rs4570625 polymorphism was significantly associated with an elevated risk of post-stroke anxiety.
- In females, both the GG genotype and G allele of rs4570625 were more prevalent in patients compared to controls.
- No significant association was found for the rs4565946 polymorphism.
- Haplotype analysis indicated that the G-C haplotype increased the risk of post-stroke anxiety.
Conclusions:
- The study identifies specific polymorphisms in the TPH2 gene (rs4570625) as risk factors for developing anxiety after stroke in the Han Chinese population.
- These findings contribute to understanding the genetic predisposition to post-stroke anxiety.
- Further research could explore other TPH2 polymorphisms and their combined effects.
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