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- W4313373330 abstract "Abstract Fetal placental macrophages (Hofbauer cells (HCs)) appear at 18 days post-conception and are maintained throughout pregnancy. Despite their identification more than a century ago, there are few studies characterizing the evolution of human HC phenotype through gestation. Using high-dimensional flow cytometry, we measured expression of CD68, CD80, CD86, HLA-DR, CD163, CD206, and CD209 on human HCs ex vivo. This panel includes markers previously validated on term human HCs for immune activation (CD80, CD86) and modulation (DC-SIGN, HLA-DR). To best capture the spectrum of HC diversity across gestation, we employed an unbiased approach to analyze processed datasets from HCs isolated from placentae 12–17 weeks gestational age (n=5), 17–24 weeks gestational age (n=7) and at term (n=5) using t-distributed stochastic neighbor embedding analysis (tSNE). HC populations were more diverse early in pregnancy and at term, compared to the second trimester; this is anticipated given the changing microenvironment following initial placental anchoring to eventual parturition. Marker expression heatmaps were generated to assess gestation-dependent changes in HC phenotype; HCs expressing activation markers were most frequent in early gestation, and reduced by term. HCs bearing markers of immune modulation were most frequent at mid-gestation, and least in early gestation. These results demonstrate the power of utilizing computational methods to analyze high-dimensional flow cytometry data collected from an understudied cell type and demonstrate how HCs phenotypically evolve during human pregnancy." @default.
- W4313373330 created "2023-01-06" @default.
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- W4313373330 date "2020-05-01" @default.
- W4313373330 modified "2023-09-27" @default.
- W4313373330 title "Baby’s First Macrophage: characterizing Hofbauer Cell phenotype through gestation using unsupervised dimensionality reduction" @default.
- W4313373330 doi "https://doi.org/10.4049/jimmunol.204.supp.235.19" @default.
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