Skip to main content

Harvesting and Characterization of Syncytial Nuclear Aggregates Following Culture of First Trimester Human Placental Explants

  • Protocol
  • First Online:

Part of the book series: Methods in Molecular Biology ((MIMB,volume 1710))

Abstract

There is currently no effective method to study multinucleated trophoblast debris extruded from the syncytiotrophoblast into the maternal circulation. In Chapter 9, an in vitro placental explant culture model to generate trophoblast debris was described. Here, we detail the method utilized to isolate individual large multinucleated syncytial nuclear aggregates (SNAs) that are extruded from the syncytiotrophoblast following the culture of first trimester human placental explants. Syncytial nuclear aggregates have been observed in the peripheral maternal circulation as early as 6 weeks’ gestation and may play a role in tolerating the maternal immune system during pregnancy. Conversely, aberrant cell death processes in the syncytiotrophoblast due to various maternal factors leading to the extrusion of SNAs that are altered in nature have been implicated in the development of preeclampsia. The methods described herein allow for the isolation and harvest of SNAs without other types of extruded trophoblast debris and can be used to investigate the effect of various maternal factors on the nature of SNAs extruded from the placenta in vitro.

This is a preview of subscription content, log in via an institution.

Springer Nature is developing a new tool to find and evaluate Protocols. Learn more

References

  1. Schmorl G (1893) Pathologisch-anatomische Untersuchungen über Puerperal-Eklampsie. Vogel, Würzburg

    Google Scholar 

  2. Chua S, Wilkins T, Sargent I, Redman C (1991) Trophoblast deportation in pre-eclamptic pregnancy. Br J Obstet Gynaecol 98(10):973–979

    Article  CAS  PubMed  Google Scholar 

  3. Johansen M, Knight M, Maher EJ, Smith K, Sargent IL (1995) An investigation of methods for enriching trophoblast from maternal blood. Prenat Diagn 15(10):921

    Article  CAS  PubMed  Google Scholar 

  4. Attwood HD, Park WW (1961) Embolism to the lungs by trophoblast. J Obstet Gynecol 68:611–617

    CAS  Google Scholar 

  5. Johansen M, Redman CW, Wilkins T, Sargent IL (1999) Trophoblast deportation in human pregnancy—its relevance for pre-eclampsia. Placenta 20(7):531–539

    Article  CAS  PubMed  Google Scholar 

  6. Mincheva-Nilsson L, Nagaeva O, Chen T, Stendahl U, Antsiferova J, Mogren I, Hernestal J, Baranov V (2006) Placenta-derived soluble MHC class I chain-related molecules down-regulate NKG2D receptor on peripheral blood mononuclear cells during human pregnancy: a possible novel immune escape mechanism for fetal survival. J Immunol 176(6):3585–3592

    Article  CAS  PubMed  Google Scholar 

  7. Burton G, Jones C (2009) Syncytial knots, sprouts, apoptosis, and trophoblast deportation from the human placenta. Taiwan J Obstet Gynecol 48(1):28

    Article  PubMed  Google Scholar 

  8. Cantle SJ, Kaufmann P, Luckhardt M, Schweikhart G (1987) Interpretation of syncytial sprouts and bridges in the human placenta. Placenta 8(3):221

    Article  CAS  PubMed  Google Scholar 

  9. Askelund K, Chamley L (2011) Trophoblast deportation part I: review of the evidence demonstrating trophoblast shedding and deportation during human pregnancy. Placenta 32(10):716–723

    Article  CAS  PubMed  Google Scholar 

  10. Abumaree MH, Stone PR, Chamley LW (2006) An in vitro model of human placental trophoblast deportation/shedding. Mol Hum Reprod 12(11):687

    Article  CAS  PubMed  Google Scholar 

  11. Chen L, Liu B, Zhao H, Stone P, Chen Q, Chamley L (2010) IL-6, TNFalpha and TGFbeta promote nonapoptotic trophoblast deportation and subsequently causes endothelial cell activation. Placenta 31(1):75

    Article  PubMed  Google Scholar 

  12. Chen Q, Guo F, Jin HY, Lau S, Stone P, Chamley L (2012) Phagocytosis of apoptotic trophoblastic debris protects endothelial cells against activation. Placenta 33(7):548–553. https://doi.org/10.1016/j.placenta.2012.03.007

    Article  CAS  PubMed  Google Scholar 

  13. Chen Q, Stone PR, McCowan LM, Chamley LW (2006) Phagocytosis of necrotic but not apoptotic trophoblasts induces endothelial cell activation. Hypertension 47(1):116

    Article  CAS  PubMed  Google Scholar 

  14. Chen Q, Viall C, Kang Y, Liu B, Stone P, Chamley L (2009) Anti-phospholipid antibodies increase non-apoptotic trophoblast shedding: a contribution to the pathogenesis of pre-eclampsia in affected women? Placenta 30(9):767–773

    Article  CAS  PubMed  Google Scholar 

  15. Smith P, Krohn R, Hermanson G, Mallia A, Gartner F, Provenzano M, Fujimoto E, Goeke N, Olson B, Klenk D (1985) Measurement of protein using bicinchoninic acid. Anal Biochem 150(1):76

    Article  CAS  PubMed  Google Scholar 

Download references

Acknowledgment

This study was funded by the Marsden Fund of the Royal Society of New Zealand. P.P. is a recipient of The University of Auckland Health Research Doctoral Scholarship.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Priyadarshini Pantham .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2018 Springer Science+Business Media LLC

About this protocol

Check for updates. Verify currency and authenticity via CrossMark

Cite this protocol

Pantham, P., Chamley, L.W. (2018). Harvesting and Characterization of Syncytial Nuclear Aggregates Following Culture of First Trimester Human Placental Explants. In: Murthi, P., Vaillancourt, C. (eds) Preeclampsia . Methods in Molecular Biology, vol 1710. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-7498-6_12

Download citation

  • DOI: https://doi.org/10.1007/978-1-4939-7498-6_12

  • Published:

  • Publisher Name: Humana Press, New York, NY

  • Print ISBN: 978-1-4939-7497-9

  • Online ISBN: 978-1-4939-7498-6

  • eBook Packages: Springer Protocols

Publish with us

Policies and ethics