Advanced search
1 file | 1.08 MB Add to list

Placental mitochondrial DNA content is associated with childhood intelligence

Author
Organization
Abstract
Background: Developmental processes in the placenta and the fetal brain are shaped by the similar biological signals. Evidence accumulates that adaptive responses of the placenta may influence central nervous system development. We hypothesize that placental mtDNA content at birth is associated with intelligence in childhood. In addition, we investigate if intra-pair differences in mtDNA content are associated with intra-pair differences in intelligence. Methods: Relative mtDNA content was measured using qPCR in placental tissue of 375 children of the East Flanders Prospective Twin Survey. Intelligence was assessed with the Wechsler Intelligence Scale for Children-Revised (WISC-R) between 8 and 15 years old. We accounted for sex, gestational age, birth weight, birth year, zygosity and chorionicity, cord insertion, age at measurement, indicators of socioeconomic status, smoking during pregnancy, and urban environment. Results: In multivariable adjusted mixed modelling analysis, each doubling in placental mtDNA content was associated with 2.0 points (95% CI 0.02 to 3.9; p = 0.05) higher total and 2.3 points (95% CI 0.2 to 4.3; p = 0.03) higher performance IQ in childhood. We observed no association between mtDNA content and verbal intelligence. Intra-pair differences in mtDNA content and IQ were significantly (p = 0.01) correlated in monozygotic-monochorionic twin pairs, showing that the twin with the highest mtDNA content was 1.9 times more likely (p = 0.05) to have the highest IQ. This was not observed in dichorionic twin pairs. Conclusions: We provide the first evidence that placental mtDNA content is associated with childhood intelligence. This emphasizes the importance of placental mitochondrial function during in utero life on fetal brain development with long-lasting consequences.
Keywords
TWIN-SINGLETON DIFFERENCES, NEUROACTIVE STEROIDS, PYRAMIDAL NEURONS, BRAIN-DEVELOPMENT, AIR-POLLUTION, FETAL-BRAIN, COPY NUMBER, EXPRESSION, PREGNANCY, SEROTONIN, Mitochondrial DNA content, Placenta, Intelligence, Childhood, Twins, DOHaD

Downloads

  • s12967-019-2105-y.pdf
    • full text (Published version)
    • |
    • open access
    • |
    • PDF
    • |
    • 1.08 MB

Citation

Please use this url to cite or link to this publication:

MLA
Bijnens, Esmée, et al. “Placental Mitochondrial DNA Content Is Associated with Childhood Intelligence.” JOURNAL OF TRANSLATIONAL MEDICINE, vol. 17, no. 1, 2019, doi:10.1186/s12967-019-2105-y.
APA
Bijnens, E., Derom, C., Weyers, S., Janssen, B. G., Thiery, E., & Nawrot, T. S. (2019). Placental mitochondrial DNA content is associated with childhood intelligence. JOURNAL OF TRANSLATIONAL MEDICINE, 17(1). https://doi.org/10.1186/s12967-019-2105-y
Chicago author-date
Bijnens, Esmée, Catherine Derom, Steven Weyers, Bram G. Janssen, Evert Thiery, and Tim S. Nawrot. 2019. “Placental Mitochondrial DNA Content Is Associated with Childhood Intelligence.” JOURNAL OF TRANSLATIONAL MEDICINE 17 (1). https://doi.org/10.1186/s12967-019-2105-y.
Chicago author-date (all authors)
Bijnens, Esmée, Catherine Derom, Steven Weyers, Bram G. Janssen, Evert Thiery, and Tim S. Nawrot. 2019. “Placental Mitochondrial DNA Content Is Associated with Childhood Intelligence.” JOURNAL OF TRANSLATIONAL MEDICINE 17 (1). doi:10.1186/s12967-019-2105-y.
Vancouver
1.
Bijnens E, Derom C, Weyers S, Janssen BG, Thiery E, Nawrot TS. Placental mitochondrial DNA content is associated with childhood intelligence. JOURNAL OF TRANSLATIONAL MEDICINE. 2019;17(1).
IEEE
[1]
E. Bijnens, C. Derom, S. Weyers, B. G. Janssen, E. Thiery, and T. S. Nawrot, “Placental mitochondrial DNA content is associated with childhood intelligence,” JOURNAL OF TRANSLATIONAL MEDICINE, vol. 17, no. 1, 2019.
@article{8679432,
  abstract     = {{Background: Developmental processes in the placenta and the fetal brain are shaped by the similar biological signals. Evidence accumulates that adaptive responses of the placenta may influence central nervous system development. We hypothesize that placental mtDNA content at birth is associated with intelligence in childhood. In addition, we investigate if intra-pair differences in mtDNA content are associated with intra-pair differences in intelligence.

Methods: Relative mtDNA content was measured using qPCR in placental tissue of 375 children of the East Flanders Prospective Twin Survey. Intelligence was assessed with the Wechsler Intelligence Scale for Children-Revised (WISC-R) between 8 and 15 years old. We accounted for sex, gestational age, birth weight, birth year, zygosity and chorionicity, cord insertion, age at measurement, indicators of socioeconomic status, smoking during pregnancy, and urban environment.

Results: In multivariable adjusted mixed modelling analysis, each doubling in placental mtDNA content was associated with 2.0 points (95% CI 0.02 to 3.9; p = 0.05) higher total and 2.3 points (95% CI 0.2 to 4.3; p = 0.03) higher performance IQ in childhood. We observed no association between mtDNA content and verbal intelligence. Intra-pair differences in mtDNA content and IQ were significantly (p = 0.01) correlated in monozygotic-monochorionic twin pairs, showing that the twin with the highest mtDNA content was 1.9 times more likely (p = 0.05) to have the highest IQ. This was not observed in dichorionic twin pairs.

Conclusions: We provide the first evidence that placental mtDNA content is associated with childhood intelligence. This emphasizes the importance of placental mitochondrial function during in utero life on fetal brain development with long-lasting consequences.}},
  articleno    = {{361}},
  author       = {{Bijnens, Esmée and Derom, Catherine and Weyers, Steven and Janssen, Bram G. and Thiery, Evert and Nawrot, Tim S.}},
  issn         = {{1479-5876}},
  journal      = {{JOURNAL OF TRANSLATIONAL MEDICINE}},
  keywords     = {{TWIN-SINGLETON DIFFERENCES,NEUROACTIVE STEROIDS,PYRAMIDAL NEURONS,BRAIN-DEVELOPMENT,AIR-POLLUTION,FETAL-BRAIN,COPY NUMBER,EXPRESSION,PREGNANCY,SEROTONIN,Mitochondrial DNA content,Placenta,Intelligence,Childhood,Twins,DOHaD}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{9}},
  title        = {{Placental mitochondrial DNA content is associated with childhood intelligence}},
  url          = {{http://dx.doi.org/10.1186/s12967-019-2105-y}},
  volume       = {{17}},
  year         = {{2019}},
}

Altmetric
View in Altmetric
Web of Science
Times cited: