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Mature naive B cell...
Mature naive B cells are retained in the placental intervillous blood and positively associate with specific chemokines in full-term healthy pregnancy
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- Solders, M. (author)
- Karolinska Institutet
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- Lundell, Anna-Carin, 1976 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för reumatologi och inflammationsforskning,Institute of Medicine, Department of Rheumatology and Inflammation Research
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- Gorchs, L. (author)
- Karolinska Institutet
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- Gidlof, S. (author)
- Karolinska Institutet
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- Tiblad, E. (author)
- Karolinska Institutet
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- Kaipe, H. (author)
- Karolinska Institutet
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(creator_code:org_t)
- 2019-06-18
- 2019
- English.
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In: American Journal of Reproductive Immunology. - : Wiley. - 1046-7408 .- 1600-0897. ; 82:3
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Abstract
Subject headings
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- Problem Circulating B-cell numbers are lower during pregnancy compared with non-pregnant women, but the underlying reasons for this are unknown. Pregnancy-related hormones could influence B-cell lymphopoiesis in the bone marrow, but B cells may also be recruited to the placenta. To investigate the latter, we examined whether the proportions of total B cells and B cells at different maturational stages in placental intervillous blood (IVB) differ compared with peripheral blood (PB). Method of study From 23 paired samples of PB and IVB following full-term healthy pregnancies, total B cells and immature/transitional, mature/naive, and memory B cells were identified by flow cytometry. Chemokine levels in blood were analyzed using a Luminex assay. Placental explant-derived supernatant was assayed for B-cell chemotactic activity. Results The proportions of total B cells and mature/naive B cells were significantly higher in IVB relative to PB, while the fractions of immature/transitional cells and memory B cells were higher in PB. Multivariate factor analysis demonstrated that a specific chemokine profile in IVB, including CCL20, positively associated with higher proportions of mature/naive B cells in the intervillous space. All B cells expressed CCR6, the corresponding receptor for CCL20, but the intensity of CCR6 expression was significantly higher in mature/naive B cells relative to immature/transitional B cells. Migration assays showed that placental explant-derived supernatants attract B cells. Conclusion These results indicate that B cells, and mature/naive B cells in particular, are retained in the intervillous blood in response to certain chemokines produced by the placenta during late healthy pregnancy.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Reproduktionsmedicin och gynekologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Obstetrics, Gynaecology and Reproductive Medicine (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Immunologi inom det medicinska området (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Immunology in the medical area (hsv//eng)
Keyword
- B cells
- B-cell maturation
- chemokines
- intervillous blood
- placenta
- subsets
- reconstitution
- lymphopoiesis
- memory
- fetus
- Immunology
- Reproductive Biology
Publication and Content Type
- ref (subject category)
- art (subject category)
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