Maternal glycemia in pregnancy is longitudinally associated with blood DNAm variation at the FSD1L gene from birth to 5 years of age
Background In utero exposure to maternal hyperglycemia has been associated with an increased risk for the development of chronic diseases in later life. These predispositions may be programmed by fetal DNA methylation (DNAm) changes that persist postnatally. However, although some studies have assoc...
Saved in:
| Published in: | Clinical epigenetics Vol. 15; no. 1; pp. 107 - 11 |
|---|---|
| Main Authors: | , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
London
BioMed Central
29.06.2023
BioMed Central Ltd Springer Nature B.V BMC |
| Subjects: | |
| ISSN: | 1868-7083, 1868-7075, 1868-7083, 1868-7075 |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Background
In utero exposure to maternal hyperglycemia has been associated with an increased risk for the development of chronic diseases in later life. These predispositions may be programmed by fetal DNA methylation (DNAm) changes that persist postnatally. However, although some studies have associated fetal exposure to gestational hyperglycemia with DNAm variations at birth, and metabolic phenotypes in childhood, no study has yet examined how maternal hyperglycemia during pregnancy may be associated with offspring DNAm from birth to five years of age
.
Hypothesis
Maternal hyperglycemia is associated with variation in offspring DNAm from birth to 5 years of age.
Methods
We estimated maternal hyperglycemia using the area under the curve for glucose (AUC
glu
) following an oral glucose tolerance test conducted at 24–30 weeks of pregnancy. We quantified DNAm levels in cord blood (
n
= 440) and peripheral blood at five years of age (
n
= 293) using the Infinium MethylationEPIC BeadChip (Illumina). Our total sample included 539 unique dyads (mother–child) with 194 dyads having DNAm at both time-points. We first regressed DNAm
M
-values against the cell types and child age for each time-point separately to account for the difference by time of measurement for these variables. We then used a random intercept model from the linear mixed model (LMM) framework to assess the longitudinal association between maternal AUCglu and the repeated measures of residuals of DNAm. We adjusted for the following covariates as fixed effects in the random intercept model: maternal age, gravidity, smoking status, child sex, maternal body mass index (BMI) (measured at first trimester of pregnancy), and a binary variable for time-point.
Results
In utero exposure to higher maternal AUC
glu
was associated with lower offspring blood DNAm levels at cg00967989 located in
FSD1L
gene (
β
= − 0.0267,
P
= 2.13 × 10
–8
) in adjusted linear regression mixed models. Our study also reports other CpG sites for which DNAm levels were suggestively associated (
P
< 1.0 × 10
–5
) with in utero exposure to gestational hyperglycemia. Two of these (cg12140144 and cg07946633) were found in the promotor region of
PRDM16
gene (
β
: − 0.0251,
P
= 4.37 × 10
–07
and
β
: − 0.0206,
P
= 2.24 × 10
–06
, respectively).
Conclusion
Maternal hyperglycemia is associated with offspring DNAm longitudinally assessed from birth to 5 years of age. |
|---|---|
| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 |
| ISSN: | 1868-7083 1868-7075 1868-7083 1868-7075 |
| DOI: | 10.1186/s13148-023-01524-7 |