Abstract:
OBJECTIVE:Glucocorticoid receptor gene (NR3C1) promoter methylation influences cellular expression of the glucocorticoid receptor and is a proposed mechanism by which early life stress impacts neuroendocrine function. Mitochondria are sensitive and responsive to neuroendocrine stress signaling through the glucocorticoid receptor, and recent evidence with this sample and others shows that mitochondrial DNA copy number (mtDNAcn) is increased in adults with a history of early stress. No prior work has examined the role of NR3C1 methylation in the association between early life stress and mtDNAcn alterations. METHODS:Adult participants (n = 290) completed diagnostic interviews and questionnaires characterizing early stress and lifetime psychiatric symptoms. Medical conditions, active substance abuse, and prescription medications other than oral contraceptives were exclusionary. Subjects with a history of lifetime bipolar, obsessive-compulsive, or psychotic disorders were excluded; individuals with other forms of major psychopathology were included. Whole blood mtDNAcn was measured using qPCR; NR3C1 methylation was measured via pyrosequencing. Multiple regression and bootstrapping procedures tested NR3C1 methylation as a mediator of effects of early stress on mtDNAcn. RESULTS:The positive association between early adversity and mtDNAcn (p = .02) was mediated by negative associations of early adversity with NR3C1 methylation (p = .02) and NR3C1 methylation with mtDNAcn (p < .001). The indirect effect involving early adversity, NR3C1 methylation, and mtDNAcn was significant (95 % CI [.002, .030]). CONCLUSIONS:NR3C1 methylation significantly mediates the association between early stress and mtDNAcn, suggesting that glucocorticoid receptor signaling may be a mechanistic pathway underlying mtDNAcn alterations of interest for future longitudinal work.
journal_name
Psychoneuroendocrinologyjournal_title
Psychoneuroendocrinologyauthors
Ridout KK,Coe JL,Parade SH,Marsit CJ,Kao HT,Porton B,Carpenter LL,Price LH,Tyrka ARdoi
10.1016/j.psyneuen.2020.104632subject
Has Abstractpub_date
2020-06-01 00:00:00pages
104632eissn
0306-4530issn
1873-3360pii
S0306-4530(20)30051-2journal_volume
116pub_type
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pub_type: 临床试验,杂志文章,随机对照试验
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pub_type: 临床试验,杂志文章
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2004-10-01 00:00:00
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pub_type: 杂志文章
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更新日期:2006-04-01 00:00:00
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journal_title:Psychoneuroendocrinology
pub_type: 临床试验,杂志文章
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更新日期:2005-09-01 00:00:00