Cited by 48Reproductive System and PregnancyReproductive Biology and FertilityPregnancy and preeclampsia studies

Cellular stress causes reversible, PRKAA1/2-, and proteasome-dependent ID2 protein loss in trophoblast stem cells

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Zhong, W, Xie, Y, Abdallah, M, Awonuga, A O, Slater, J A, Sipahi, L, Puscheck, E E, Rappolee, D A·2010·Reproduction

Abstract

Stress reduces fertility, but the mechanisms mediating this are not understood. For a successful pregnancy, placental trophoblast stem cells (TSCs) in the implanting embryo proliferate and then a subpopulation differentiates to produce hormones. Normally, differentiation occurs when inhibitor of differentiation 2 (ID2) protein is lost in human and mouse placental stem cells. We hypothesize that stress enzyme-dependent differentiation occurs in association with insufficient TSC accumulation. We studied a well-defined model where TSC differentiation requires ID2 loss. The loss of ID2 derepresses the promoter of chorionic somatomammotropin hormone 1 (CSH1), the first hormone after implantation. Csh1 mRNA is known to be induced in stressed TSCs. In this study, we demonstrate that AMP-activated protein kinase (PRKAA1/2, aka AMPK) mediates the stress-induced proteasome-dependent loss of ID2 at high stress levels. At very low stress levels, PRKAA1/2 mediates metabolic adaptation exemplified by the inactivation of acetyl coA carboxylase by phosphorylation without ID2 loss. At the highest stress levels, irreversible TSC differentiation as defined by ID2 loss and slower cell accumulation occurs. However, lower stress levels lead to reversible differentiation accompanied by metabolic adaptation. These data support the hypothesis that PRKAA1/2 mediates preparation for differentiation that is induced by stress at levels where a significant decrease in cell accumulation occurs. This supports the interpretation that enzyme-mediated increases in differentiation may compensate when insufficient numbers of stem cells accumulate.

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  • Activation of AMPK has been demonstrated to be a key step in the differentiation of mouse trophoblast stem cells under stress conditions, confirming that the pathway is functional in this cell type.

    “Activation has been demonstrated to be a key step in the differentiation of mouse trophoblast stem cells under stress conditions (613), confirming that the pathway is functional in this cell type.”

    From Placental Origins of Chronic Disease (2016) · cites this paper as [613]

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Authors
Zhong, W., Xie, Y., Abdallah, M., Awonuga, A. O., Slater, J. A., Sipahi, L., Puscheck, E. E., & Rappolee, D. A.
Affiliations
Wayne State University (US)
Venue
Reproduction
Published
2010-12-01
Volume
140
Issue
6
Pages
921-930
ISSN
  • 1470-1626 (ISSN-L)
  • 1741-7899
OpenAlex
W2131769373
Cited by
48
References
51
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 1 · 2022: 2 · 2020: 1 · 2019: 1 · 2018: 4 · 2017: 9 · 2016: 7 · 2015: 3 · 2014: 5 · 2013: 4 · 2012: 3
FWCI
1.51
Type
journal article
Language
en
Open access
Locations
  • Reproduction (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Aeronautics and Space Administration
  • National Institutes of Health
  • National Institute of Child Health and Human Development
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R03HD061431, R01HD040972, R01 HD 40972 A)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Reproductive System and Pregnancy
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
  • Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
Keywords
trophoblast stem cells, Id2, AMPK, proteasome, cellular stress, stem cell differentiation, acetyl-CoA carboxylase, metabolic adaptation, placenta, pregnancy, fertility
MeSH terms
Animals, Cells, Cultured, Female, Humans, Male, Mice, Inbred C57BL, Phosphorylation, Pregnancy, Protein Processing, Post-Translational, Stem Cells, Stress, Physiological, Trophoblasts, Proteasome Endopeptidase Complex, Mice, Inhibitor of Differentiation Protein 2, AMP-Activated Protein Kinases

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