The study included 88 type 2 diabetic patients, which are further divided into two groups; depressed and non-depressed. Depression was assessed by Hamilton Depression Rating Scale (HAM-D) and structured clinical interview for DSM-IV Axis disorder (SCID-I) for diagnosing depression and exclusion of other psychiatric disorders. Genotyping was performed by using Real Time-PCR (TaqMan probes).
This study aimed to evaluate the relation between the levels of (Brain Derived Neurotropic Factor) BDNF and val66met polymorphism of BDNF gene, and the presence of depression in type 2 diabetes. In addition to studying the relationship between BDNF level and val66met polymorphism of its gene and assessing relation between BDNF level and obesity.