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Discrimination exposure and DNA methylation of stress-related genes in Latina mothers.

Abstract：

:Latina mothers, who have the highest fertility rate among all ethnic groups in the US, are often exposed to discrimination. The epigenetic changes related to this discrimination are largely unknown. This study is the first to explore the relationship between discrimination and DNA methylation of stress regulatory genes in Latinas. Our sample was Latina women (n = 147) with a mean age of 27.6 years who were assessed at 24-32 weeks' gestation (T1) and 4-6 weeks postpartum (T2) and reside in the U.S. Blood was collected at T1, and the Everyday Discrimination Scale (EDS) was administered at T1 and T2. DNA Methylation at candidate gene regions was determined by bisulphite pyrosequencing. Associations between EDS and DNA methylation were assessed via zero-inflated Poisson models, adjusting for covariates and multiple-test comparisons. Discrimination was negatively associated with methylation at CpG sites within the glucocorticoid receptor (NR3C1) and brain-derived neurotrophic factor (BDNF) genes that were consistent over time. In addition, discrimination was negatively associated with methylation of a CpG in the glucocorticoid binding protein (FKBP5) at T1 but not at T2. This study underscores associations between discrimination and epigenetic markers of DNA methylation in Latinas that warrant further investigation to better understand the biological pathways and psychopathological effects of discrimination on Latina mothers and their families.

journal_name

Psychoneuroendocrinology

journal_title

Psychoneuroendocrinology

authors

Santos HP Jr,Nephew BC,Bhattacharya A,Tan X,Smith L,Alyamani RAS,Martin EM,Perreira K,Fry RC,Murgatroyd C

doi

10.1016/j.psyneuen.2018.08.014

subject

Has Abstract

pub_date

2018-12-01 00:00:00

pages

131-138

eissn

0306-4530

issn

1873-3360

pii

S0306-4530(18)30386-X

journal_volume

98

pub_type

杂志文章

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