IL-17C is a driver of damaging inflammation during Neisseria gonorrhoeae infection of human Fallopian tube

Erin M. Garcia, Jonathan D. Lenz, Ryan E. Schaub, Kathleen T. Hackett, Wilmara Salgado-Pabón and Joseph P. Dillard ()
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Erin M. Garcia: University of Wisconsin-Madison
Jonathan D. Lenz: University of Wisconsin-Madison
Ryan E. Schaub: University of Wisconsin-Madison
Kathleen T. Hackett: University of Wisconsin-Madison
Wilmara Salgado-Pabón: University of Wisconsin-Madison
Joseph P. Dillard: University of Wisconsin-Madison

Nature Communications, 2024, vol. 15, issue 1, 1-15

Abstract: Abstract The human pathogen Neisseria gonorrhoeae ascends into the upper female reproductive tract to cause damaging inflammation within the Fallopian tubes and pelvic inflammatory disease (PID), increasing the risk of infertility and ectopic pregnancy. The loss of ciliated cells from the epithelium is thought to be both a consequence of inflammation and a cause of adverse sequelae. However, the links between infection, inflammation, and ciliated cell extrusion remain unresolved. With the use of ex vivo cultures of human Fallopian tube paired with RNA sequencing we defined the tissue response to gonococcal challenge, identifying cytokine, chemokine, cell adhesion, and apoptosis related transcripts not previously recognized as potentiators of gonococcal PID. Unexpectedly, IL-17C was one of the most highly induced genes. Yet, this cytokine has no previous association with gonococcal infection nor pelvic inflammatory disease and thus it was selected for further characterization. We show that human Fallopian tubes express the IL-17C receptor on the epithelial surface and that treatment with purified IL-17C induces pro-inflammatory cytokine secretion in addition to sloughing of the epithelium and generalized tissue damage. These results demonstrate a previously unrecognized but critical role of IL-17C in the damaging inflammation induced by gonococci in a human explant model of PID.

Date: 2024
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DOI: 10.1038/s41467-024-48141-3

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