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Molecular signatures of major depression.


ABSTRACT: Adversity, particularly in early life, can cause illness. Clues to the responsible mechanisms may lie with the discovery of molecular signatures of stress, some of which include alterations to an individual's somatic genome. Here, using genome sequences from 11,670 women, we observed a highly significant association between a stress-related disease, major depression, and the amount of mtDNA (p = 9.00 × 10(-42), odds ratio 1.33 [95% confidence interval [CI] = 1.29-1.37]) and telomere length (p = 2.84 × 10(-14), odds ratio 0.85 [95% CI = 0.81-0.89]). While both telomere length and mtDNA amount were associated with adverse life events, conditional regression analyses showed the molecular changes were contingent on the depressed state. We tested this hypothesis with experiments in mice, demonstrating that stress causes both molecular changes, which are partly reversible and can be elicited by the administration of corticosterone. Together, these results demonstrate that changes in the amount of mtDNA and telomere length are consequences of stress and entering a depressed state. These findings identify increased amounts of mtDNA as a molecular marker of MD and have important implications for understanding how stress causes the disease.

SUBMITTER: Cai N 

PROVIDER: S-EPMC4425463 | biostudies-literature | 2015 May

REPOSITORIES: biostudies-literature

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Molecular signatures of major depression.

Cai Na N   Chang Simon S   Li Yihan Y   Li Qibin Q   Hu Jingchu J   Liang Jieqin J   Song Li L   Kretzschmar Warren W   Gan Xiangchao X   Nicod Jerome J   Rivera Margarita M   Deng Hong H   Du Bo B   Li Keqing K   Sang Wenhu W   Gao Jingfang J   Gao Shugui S   Ha Baowei B   Ho Hung-Yao HY   Hu Chunmei C   Hu Jian J   Hu Zhenfei Z   Huang Guoping G   Jiang Guoqing G   Jiang Tao T   Jin Wei W   Li Gongying G   Li Kan K   Li Yi Y   Li Yingrui Y   Li Youhui Y   Lin Yu-Ting YT   Liu Lanfen L   Liu Tiebang T   Liu Ying Y   Liu Yuan Y   Lu Yao Y   Lv Luxian L   Meng Huaqing H   Qian Puyi P   Sang Hong H   Shen Jianhua J   Shi Jianguo J   Sun Jing J   Tao Ming M   Wang Gang G   Wang Guangbiao G   Wang Jian J   Wang Linmao L   Wang Xueyi X   Wang Xumei X   Yang Huanming H   Yang Lijun L   Yin Ye Y   Zhang Jinbei J   Zhang Kerang K   Sun Ning N   Zhang Wei W   Zhang Xiuqing X   Zhang Zhen Z   Zhong Hui H   Breen Gerome G   Wang Jun J   Marchini Jonathan J   Chen Yiping Y   Xu Qi Q   Xu Xun X   Mott Richard R   Huang Guo-Jen GJ   Kendler Kenneth K   Flint Jonathan J  

Current biology : CB 20150423 9


Adversity, particularly in early life, can cause illness. Clues to the responsible mechanisms may lie with the discovery of molecular signatures of stress, some of which include alterations to an individual's somatic genome. Here, using genome sequences from 11,670 women, we observed a highly significant association between a stress-related disease, major depression, and the amount of mtDNA (p = 9.00 × 10(-42), odds ratio 1.33 [95% confidence interval [CI] = 1.29-1.37]) and telomere length (p =  ...[more]

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