Association between TNF-alpha polymorphism and the age of first suicide attempt in chronic patients with schizophrenia.

Association between TNF-alpha polymorphism and the age of first suicide attempt in chronic patients with schizophrenia. Aging (Albany NY). 2020 Jan 18;12: Authors: Lang X, Trihn TH, Wu HE, Tong Y, Xiu M, Zhang XY Abstract Patients with schizophrenia (SCZ) exhibit higher suicide rates than the general population. However, the molecular mechanism remains poorly understood. Tumor necrosis factor (TNF)-alpha polymorphisms have been repeatedly indicated to play a pathogenetic role in various mental disorders, but none of these studies focused on the susceptibility to suicidal behavior in SCZ. We recruited 1087 chronic inpatients with SCZ and 576 controls to assess the psychopathological symptoms of SCZ using the Positive and Negative Syndrome Scale scales. We selected 2 polymorphisms (-308G>A and -1031C>T) in the TNF-alpha gene and analyzed their associations with SCZ and suicide. Our results showed that TNF-alpha -308G>A and -1031C>T were not related to SCZ and suicide. However, we found that suicide attempters with the C allele carriers exhibited suicidal behaviors significantly later than those with TT genotype in the SCZ patients. The haplotype containing the T allele of the -1031 was significantly associated with the age of suicide initiation. Further logistic regression analysis showed that -1031C>T interacted with psychopathological symptoms and drinking, age of smoking, and related to the initiation age of suicide a...
Source: Aging - Category: Biomedical Science Authors: Tags: Aging (Albany NY) Source Type: research