Thymic Stromal Lymphopoietin Participates in the Host Response to Intra-amniotic Inflammation Leading to Preterm Labor and Birth

Overview

Journal Hum Immunol

Specialty Allergy & Immunology

Date 2023 Jul 8

PMID 37422429

Authors

Tomi Kanninen

Li Tao

Roberto Romero

Yi Xu

Marcia Arenas-Hernandez

Jose Galaz

Zhenjie Liu

Derek Miller

Dustyn Levenson

Jonathan M Greenberg

Jonathan Panzer

Justin Padron

Kevin R Theis

Nardhy Gomez-Lopez

Affiliations

Soon will be listed here.

Abstract

The aim of this study was to establish the role of thymic stromal lymphopoietin (TSLP) in the intra-amniotic host response of women with spontaneous preterm labor (sPTL) and birth. Amniotic fluid and chorioamniotic membranes (CAM) were collected from women with sPTL who delivered at term (n = 30) or preterm without intra-amniotic inflammation (n = 34), with sterile intra-amniotic inflammation (SIAI, n = 27), or with intra-amniotic infection (IAI, n = 17). Amnion epithelial cells (AEC), Ureaplasma parvum, and Sneathia spp. were also utilized. The expression of TSLP, TSLPR, and IL-7Rα was evaluated in amniotic fluid or CAM by RT-qPCR and/or immunoassays. AEC co-cultured with Ureaplasma parvum or Sneathia spp. were evaluated for TSLP expression by immunofluorescence and/or RT-qPCR. Our data show that TSLP was elevated in amniotic fluid of women with SIAI or IAI and expressed by the CAM. TSLPR and IL-7Rα had detectable gene and protein expression in the CAM; yet, CRLF2 was specifically elevated with IAI. While TSLP localized to all layers of the CAM and increased with SIAI or IAI, TSLPR and IL-7Rα were minimal and became most apparent with IAI. Co-culture experiments indicated that Ureaplasma parvum and Sneathia spp. differentially upregulated TSLP expression in AEC. Together, these findings indicate that TSLP is a central component of the intra-amniotic host response during sPTL.

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