Trophoblast Cell Invasion Mechanisms in Pregnancy

Trophoblast invasion is a pivotal process in early pregnancy by which specialised placental cells migrate into the maternal decidua and remodel uterine vasculature to establish adequate blood flow to the developing foetus. Cytotrophoblasts differentiate into an invasive extravillous lineage that acquires mesenchymal characteristics through an epithelial-to-mesenchymal transition-like programme, expressing proteolytic enzymes and adhesion molecules that enable penetration of the spiral arteries. This finely tuned invasion is governed by growth factor signalling networks, notably members of the transforming growth factor-β superfamily, as well as integrin-mediated adhesion, matrix metalloproteinase activity and cytokine modulation of the local immune milieu. Disruption of these pathways can lead to insufficient arterial remodelling, contributing to disorders such as pre-eclampsia, foetal growth restriction and preterm birth. Advances in stem-cell models, three-dimensional organoid cultures and single-cell transcriptomics have begun to unravel cell-type-specific programmes and identify key regulators of the invasive trophoblast phenotype, offering new avenues for intervention in placental dysfunction and therapeutic targeting of adverse pregnancy outcomes.

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Trophoblast Cell Invasion Mechanisms in Pregnancy publication trend

The graph below shows the total number of articles in trophoblast cell invasion mechanisms in pregnancy across all publications each year (not limited to Nature Index journals).

Technical terms

Trophoblast: A population of placental epithelial cells, originating from the outer trophectoderm, that contribute to implantation and placenta formation.

Extravillous trophoblast (EVT): A differentiated trophoblast lineage that invades the maternal decidua and remodels uterine arteries.

Epithelial-to-mesenchymal transition (EMT): A cellular programme whereby epithelial cells acquire migratory and invasive mesenchymal traits.

Matrix metalloproteinase (MMP): A family of zinc-dependent proteases that degrade extracellular matrix components to facilitate cell invasion.

Transforming growth factor-β (TGFβ): A multifunctional cytokine superfamily that regulates cell proliferation, differentiation, migration and immune responses.

SMAD proteins: Intracellular transducers that convey signals from TGFβ receptors to the nucleus, modulating gene expression.

References

1. TGFβ signalling: a nexus between inflammation, placental health and preeclampsia throughout pregnancy. Human Reproduction Update (2024).
2. Snail mediates GDF-8-stimulated human extravillous trophoblast cell invasion by upregulating MMP2 expression. Cell Communication and Signaling (2023).