VIP contribution to sustain immunetolerance during the peri-implantation period: focus on Tregs recruitment

LUCILA GALLINO; NORA SARACO; FERNANDA PARBORELL; ROSANNA RAMHORST; DAIANA VOTA; NATALIA PASCUALI; CLAUDIA PEREZ LEIRÓS; ESTEBAN GRASSO; ESPERANZA BERENSZTEIN; JAMES WASCHEK

Mar del Plata

Congreso; Reunión Anual Conjunta SAI-SAIC-SAFIS; 2018

SAI-SAIC-SAFIS

Uterine receptivity and embryo implantation are two main processes that need a finely regulated balance between pro-inflammatory and tolerogenic mediators in order to allow a successful pregnancy. The immunopeptide VIP is a key regulator and is involved in the recruitment of regulatory T cells (Tregs) which are crucial in both periods. VIP-knockout mice show cycling disorders and pregnancy complications. Here, we analyzed, using two mice models, the relevance of VIP associated with the recruitment of Tregs. During the day of estrous we found histological differences between the uterus of WT mice vs VIP knockout mice (-/-) accompanied with undetectable expression levels of Foxp3, higher expression of RORγt and a decrease in IL-10 and VEGF detected by RT-PCR (p