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Updated: Jun 21, 2026

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

Published on: June 12, 2020

Complement production by trophoblast cells at the feto-maternal interface.

Roberta Bulla¹, Fleur Bossi, Chiara Agostinis

¹Department of Life Sciences, University of Trieste, 34127 Trieste, Italy.

Journal of Reproductive Immunology

|August 12, 2009

Summary

Trophoblast cells synthesize key complement proteins, C3 and C4, crucial for placental immune defense. Their production is enhanced by interferon-gamma (IFNγ), suggesting a role in fighting infections.

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Area of Science:

Immunology
Reproductive Biology
Cell Biology

Background:

Trophoblast cells are vital for feto-maternal interface immunity.
These cells recognize pathogens and recruit immune cells.
The role of trophoblast cells in complement system synthesis is not well understood.

Purpose of the Study:

To investigate the synthesis of complement components by human trophoblast cells.
To determine the regulation of complement synthesis by cytokines.

Main Methods:

ELISA and RT-PCR were used to assess complement molecule synthesis.
HTR8/SVneo trophoblast cell line and primary human first-trimester trophoblast cells (CTBs) were utilized.
Cells were treated with cytokines like IFNγ, IL-1α, and TNFα.

Main Results:

Trophoblast cells (HTR8/SVneo and CTBs) synthesize complement molecules C4 and C3.
HTR8/SVneo cells secrete measurable amounts of C6.
IFNγ up-regulated C4 expression in HTR8/SVneo cells and C3/C4 in CTBs.
IL-1α and TNFα had no significant effect on complement component expression.

Conclusions:

Human trophoblast cells produce complement components C3, C4, and C6.
Interferon-gamma (IFNγ) can regulate complement synthesis in trophoblast cells.
Trophoblast-derived complement components may contribute to placental immune defense against pathogens.