Tryptophan Hydroxylase 2 Gene Polymorphism in Anxiety and Depressive Disorder in Kashmiri Population
Published: June 1, 2014 | DOI: https://doi.org/10.7860/JCDR/2014/.4453
Raheel Mushtaq, Sheikh Shoib, Tabindah Shah, Sahil Mushtaq
1. Registrar, Department of Psychiatry, Government Medical College, Srinagar, Kashmir, India.
2. Registrar, Department of Psychiatry, Government Medical College, Srinagar, Kashmir, India.
3. Intern, Government Medical College, Srinagar, Kashmir, India.
4. Student, Acharya Shri Chander college of medical sciences , Sidhra , Jammu, Kashmir, India.
Correspondence
Dr. Raheel Mushtaq,
Senior Resident, Post Graduate, Department of Psychiatry, Govt.Medical College, Srinagar, India.
Phone: 9596554343, E-mail: shahraheel786@gmail.com
Background: The gene of tryptophan hydroxylase is widely recognized as a major candidate gene in many psychiatric disorders. However, no study has been done which investigates tryptophan hydroxylase 2 gene polymorphism in anxiety and depressive disorders in Kashmiri population (India). Objectives: To study tryptophan hydroxylase 2 (TPH2) C 11993 A gene polymorphism in anxiety and depressive disorders.
Method: Sixty patients of depression disorder, 60 patients of anxiety disorder and 40 unrelated healthy volunteers (control) were studied in a case control design. Polymorphism was determined using polymerase chain reaction (PCR) and agarose gel electrophoresis after digestion with HAP II enzyme. Genotypes and allele frequencies were compared using Chi-square tests, Fischer’s exact test, odds ratio, 95% confidence interval (C.I) and p-value of <0.05 was considered to be statistical significant.
Results: The mean age ± SD of anxiety, depression and control group was 32.73±10.99, 32.20±10 and 29.75±10.12 respectively and the difference was found to be statistically non significant (p=0.349).The mean HAM-A (Hamilton rating scale for anxiety) score and HAM-D (Hamilton rating scale for depression) score was high in both groups (anxiety and depression) and found to be statistically significant (p=0.001).Depression group had AA genotype (55.2%) than control (37.5%) and was found to be statistically non significant (p=0.890).Comparison of allelic frequency revealed no association of A allele in anxiety group (76.67%) compared with control (75.5%) and was found to be statistically non significant (p= 0.866), OR 1.09 (0.56-2.11).
Conclusion: TPH2C 11993 A gene was not found to be associated with major depressive disorder (MDD) and anxiety disorder in Kashmiri population.
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