Trophoblast Side-Population Markers are Dysregulated in Preeclampsia and Fetal Growth Restriction

Wong, Georgia P.; Hartmann, S; Simmons, DG; Ellis, Sarah; Nonn, O; Cannon, P; Nguyen, Tuong-Vi; Nguyen, A; Bartho, LA; Tong, S; Hannan, NJ; Kaitu’u-Lino, TJ

doi:10.1007/s12015-024-10764-w

Trophoblast Side-Population Markers are Dysregulated in Preeclampsia and Fetal Growth Restriction

journal contribution

posted on 2024-10-14, 01:06 authored by Georgia P. Wong, S Hartmann, DG Simmons, Sarah EllisSarah Ellis, O Nonn, P Cannon, Tuong-Vi Nguyen, A Nguyen, LA Bartho, S Tong, NJ Hannan, TJ Kaitu’u-Lino

Dysregulated progenitor cell populations may contribute to poor placental development and placental insufficiency pathogenesis. Side-population cells possess progenitor properties. Recent human trophoblast side-population isolation identified enrichment of 8 specific genes (CXCL8, ELL2, GATA6, HK2, HLA-DPB1, INTS6, SERPINE3 and UPP1) (Gamage et al. 2020, Stem Cell Rev Rep). We characterised these trophoblast side-population markers in human placenta and in placental insufficiency disorders: preeclampsia and fetal growth restriction (FGR). Trophoblast side-population markers localised to mononuclear trophoblasts lining the placental villous basement membrane in preterm control, preeclamptic and FGR placental sections (n = 3, panel of 3 markers/serial section). Analysis of single-cell transcriptomics of an organoid human trophoblast stem cell (hTSC) to extravillous trophoblast (EVT) differentiation model (Shannon et al. 2022, Development) identified that all side-population genes were enriched in mononuclear trophoblast and trophoblasts committed to differentiation under hTSC culture conditions. In vitro validation via 96 h time course hTSC differentiation to EVTs or syncytiotrophoblasts (n = 5) demonstrated ELL2 and HK2 increased with differentiation (p < 0.0024, p < 0.0039 respectively). CXCL8 and HLA-DPB1 were downregulated (p < 0.030, p < 0.011 respectively). GATA6 and INTS6 increased with EVT differentiation only, and UPP1 reduced with syncytialisation. SERPINE3 was undetectable. Trophoblast side-population marker mRNA was measured in human placentas (< 34-weeks’ gestation; n = 78 preeclampsia, n = 30 FGR, and n = 18 gestation-matched controls). ELL2, HK2 and CXCL8 were elevated in preeclamptic (p = 0.0006, p < 0.0001, p = 0.0335 respectively) and FGR placentas (p = 0.0065, p < 0.0001, p = 0.0001 respectively) versus controls. Placental GATA6 was reduced in pregnancies with preeclampsia and FGR (p = 0.0014, p = 0.0146 respectively). Placental INTS6 was reduced with FGR only (p < 0.0001). This study identified the localisation of a unique trophoblast subset enriched for side-population markers. Aberrant expression of some side-population markers may indicate disruptions to unique trophoblast subtypes in placental insufficiency.

History

Publication Date

2024-10-01

Journal

Stem Cell Reviews and Reports

Volume

20

Pagination

17p. (p. 1954-1970)

Publisher

Springer Nature

ISSN

2629-3269

Rights Statement

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