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|Title:||Investigation of short tandem repeats in major depression using whole-genome sequencing data|
|Citation:||Journal of Affective Disorders, 2018; 232:305-309|
|Chenglong Yu, Bernhard T. Baune, Ma-Li Wong, Julio Licinio|
|Abstract:||Background: Major depressive disorder (MDD) is a leading contributor to global disease burden. Recent studies have shown that genetic factors play significant roles in the susceptibility to this condition; however, the underlying genetic basis currently remains largely unknown. Short tandem repeat (STR) has been proposed as an explanatory factor in the “missing heritability” of complex diseases or traits. Methods: We investigated STR variations from 15 MDD patients and 10 ethnically matched healthy controls based on their deep whole-genome sequencing (WGS) data. The lobSTR software was used to computationally determine STRs. Results: The results of the Mexican-American sample showed that STRs are significantly richer in healthy controls than in MDD cases on each of the 23 chromosomes (all false discovery rates, FDR P-values< 0.0062); while for the Australian of European-ancestry sample, there was no statistically significant STRs difference between MDD cases and controls. Limitations: High quality WGS costs limited obtaining larger datasets. Conclusions: This preliminary work is the first study that STR variations are applied to investigate MDD based on WGS data. The results on Mexican-American population may imply that within the same ancestry, targeted sequencing on a specific chromosome or region of genome would be sufficient for examining the relationship between STR and MDD. Further studies should examine larger sequencing datasets on other ethnic groups.|
|Keywords:||Major depressive disorder; Heritability; Psychiatric genetics; Whole-genome sequencing; Genetic marker|
|Description:||Available online 24 February 2018|
|Rights:||© 2018 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Psychiatry publications|
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