Placenta and Preterm Birth

Preterm birth is the leading cause of infant death worldwide, and the associated cost with care for preterm infants is $26.2 billion per year in the U.S. alone. Additionally, maternal complications during pregnancy affect maternal health later in life. For example, women who experience preeclampsia during pregnancy are at double the risk of heart disease or stroke later in life. Altogether, pregnancy complications put a burden on caregivers, families, and the health care system.

To date, our researchers have published on the following topics:

  • Using integrated genomic, epigenomic and transcriptomic data from mothers, fathers and infants, we have identified genomic variants associated with PTB and identified 72 candidate biomarker genes for very early preterm birth.
  • We have identified transcriptomic changes in placentas from babies who have been born prematurely compared to normal term deliveries by mining publicly available datasets
  • We have performed comprehensive characterization of microRNAs, mRNAs and proteins in blood of women who have undergone spontaneous preterm labor. Our work has revealed immune signaling changes related to premature labor. This work has been released as a series of three independent manuscripts.
  • We have unveiled patterns in expression of miRNAs which are produced in the placenta and circulate to the mother and baby.
  • We have characterized how changes in expression of metabolic genes in different maternal organs change across pregnancy using mouse models.

 

Funding & Ongoing Research

Our ongoing work has been supported by the following research grants.

Systems Biology Approaches to Birth Timing and Preterm Birth Risk
The major goal of this project is to test the hypothesis that the convergence of functional data from gene expression and proteomic studies with existing GWAS and exome sequencing investigation will reveal critical targets for preterm birth risk that are not obvious from analysis of the individual datasets in isolation.
Gates Foundation
OPP1113966
11/17/14–10/31/18
PI: Nathan Price (ISB) and Louis Muglia (Cincinnati Children’s Hospital)

Harnessing “omics”: A Systems Biology approach to discovery of biological pathways in placental development and parturition
We will seek to identify key genes and pathways associated with placental maturity that are quantifiable in maternal serum and urine, as well as to create a transcriptional regulatory network in the placenta using Transcriptional Regulatory Network Analysis (TRENA), which has been developed by the Price lab as part of the NIH Accelerating Medicines Program and a Big Data to Knowledge
NIH R01 HD091527
03/10/17 -02/28/22
PI: Nathan Price (ISB) and Louis Muglia (Cincinnati Children’s Hospital)

Genetics Meets Metabolomics in Spontaneous Preterm BirthThis project aims to leverage a multi-layered systems approach to uncover the genetic control of metabolic reprogramming in preterm birth. We are integrating targeted metabolites and SNPs as well as clinical factors and demographics from a nested case-control cohort of females drawn from a population of singleton pregnancies with live births in the state of California. We are extracting multimodal biological parameters that can estimate gestational age at time of sampling and mechanistically depicting their biochemical interactions in preterm birth.
03/01/2019-02/01/2020
California 1000 Metabolic, Genetic, & Demo Data
Collaboration: Nathan Price (ISB), Amal Katrib (ISB), and Laura Jelliffe-Pawlowski (UCSF)

Publications

  • Fallen, S., Baxter, D., Wu, X., Kim, T.-K., Shynlova, O., Lee, M.Y., Scherler, K., Lye, S., Hood, L., Wang, K., 2018. Extracellular vesicle RNAs reflect placenta dysfunction and are a biomarker source for preterm labour. J. Cell. Mol. Med. https://doi.org/10.1111/jcmm.13570
  • Knijnenburg, T.A., Vockley, J.G., Chambwe, N., Gibbs, D.L., Humphries, C., Huddleston, K.C., Klein, E., Kothiyal, P., Tasseff, R., Dhankani, V., Bodian, D.L., Wong, W.S.W., Glusman, G., Mauldin, D.E., Miller, M., Slagel, J., Elasady, S., Roach, J.C., Kramer, R., Leinonen, K., Linthorst, J., Baveja, R., Baker, R., Solomon, B.D., Eley, G., Iyer, R.K., Maxwell, G.L., Bernard, B., Shmulevich, I., Hood, L., Niederhuber, J.E., 2019. Genomic and molecular characterization of preterm birth. Proc. Natl. Acad. Sci. 116, 5819. https://doi.org/10.1073/pnas.1716314116
  • Paquette, A., Baloni, P., Holloman, A.B., Nigam, S., Bammler, T., Mao, Q., Price, N.D. Temporal transcriptomic analysis of metabolic genes in maternal organs and placenta during murine pregnancy. Biol. Reprod, 2018. https://doi.org/10.1093/biolre/ioy148
  • Paquette, A., Chu, Tianjiao, Wu, Xiaogang, Wang, Kai, Price, Nathan, Sadovsky, YoelDistinct communication patterns of trophoblastic miRNA among the maternal-placental-fetal compartments. Placenta, 2018. https://doi.org/10.1016/j.placenta.2018.10.004
  • Paquette, A.G., Brockway, H.M., Price, N.D., Muglia, L.J. Comparative transcriptomic analysis of human placentae at term and preterm delivery. 2018, Biol. Reprod.. https://doi.org/10.1093/biolre/iox163
  • Paquette, A.G., Shynlova, O., Kibschull, M., Price, N.D., Lye, S.J.. Comparative analysis of gene expression in maternal peripheral blood and monocytes during spontaneous preterm labor. Am. J. Obstet. Gynecol, 2018. https://doi.org/10.1016/j.ajog.2017.12.234
  • Paquette AG, Shynlova O, Wu X, PhD, Kibschull M, Wang K, Price ND, Lye SJ . MicroRNA-transcriptome networks in whole blood and monocytes of women undergoing preterm labor. Journal of Cellular and Molecular Medicine DOI: https://doi.org/10.1111/jcmm.14567

Current Project Leads:

Nathan Price