The feto-maternal immune response to equine placentitis

American Journal of Reproductive Immunology : AJRI
Carleigh E FedorkaAmanda A Adams

Abstract

Ascending placentitis is one of the leading causes of abortion in the horse. Minimal work has focused on its effect on fetal fluids or the antenatal immune response of the fetus. Placentitis was induced via transcervical inoculation of Streptococcus equi ssp Zooepidemicus, and fluids/serum/tissues were collected 4-6 days later following euthanasia. Cytokine concentrations were detected using a multiplex immunoassay within fetal fluids (amniotic and allantoic) and serum (maternal and fetal) in inoculated and control mares. In addition, tissues from fetal (spleen, liver, lung, umbilicus, amnioallantois) and maternal (spleen, liver, lung, chorioallantois, endometrium) origin were analyzed in inoculated and control mares utilizing qPCR for expression of cytokines. No difference in cytokine concentrations in maternal or fetal serum was noted between inoculated and control mares. Concentrations of IL-1β, IL-6, IL-10, and GRO were upregulated in the amniotic fluid following inoculation, with a trend toward higher IL-6 concentration in allantoic fluid. The amnioallantoic tissue separating the two fluids had higher expression of IL-1β and IL-6 following inoculation, while chorioallantois and endometrium upregulated IL-1β and IL-8 expres...Continue Reading

References

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Citations

Feb 24, 2020·Theriogenology·Igor F CanissoFabio S Lima
Oct 25, 2020·American Journal of Reproductive Immunology : AJRI·Carleigh E FedorkaBarry A Ball
Feb 12, 2021·American Journal of Reproductive Immunology : AJRI·Margo L MacphersonDavid W Horohov
Jan 18, 2021·Journal of Reproductive Immunology·C E FedorkaB A Ball
Mar 31, 2021·Journal of Equine Veterinary Science·C E FedorkaM H T Troedsson

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