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Evidence for anti‐inflammatory effects of firocoxib administered to mares with experimentally induced placentitis
Author(s) -
Macpherson Margo L.,
Giguère Steeve,
Pozor Malgorzata A.,
Burden Chelsie A.,
Berghaus Londa J.,
Berghaus Roy D.,
Varner Jennifer C.,
Hayna Justin T.,
Benson Susanne M.,
Randell Sarah A.,
Lyle Sara K.,
Kelleman Audrey A.,
Hart Kelsey A.,
Mallicote Martha F.,
Horohov David W.
Publication year - 2021
Publication title -
american journal of reproductive immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 97
eISSN - 1600-0897
pISSN - 1046-7408
DOI - 10.1111/aji.13396
Subject(s) - amniotic fluid , medicine , fetus , andrology , gestation , pregnancy , biology , genetics
Problem Minimal evidence exists supporting therapeutic selections for equine placentitis. The goal of this study was to characterize the anti‐inflammatory effects of firocoxib when administered to mares with placentitis. Methods Mares (gestation D270‐300) were assigned to: INFECT ( n = 6; placentitis, no treatment), FIRO ( n = 6; placentitis, firocoxib, 0.1 mg/kg, PO, daily), and NORM ( n = 6; no infection/treatment). Allantoic fluid (8 hours, 24 hours, birth) and amniotic fluid (birth) were collected from mares after infection. Concentrations of IL‐1β, IL‐6, TNF‐α, IL‐10, PGF 2α , and PGE 2 in fluids were measured by ELISA. mRNA expression of IL‐1β, IL‐6, TNF‐α, IL‐8, IL‐10, matrix metalloproteinases (MMPs) −1, 3, and 9 in fetal membranes/fetuses was quantified using real‐time PCR. Results Allantoic TNF‐α concentrations were lowest in FIRO at 8 hours and 24 hours post‐infection; IL‐6 concentrations were lower in FIRO than NORM at 8 hours, lower in FIRO than INFECT at 24 hours post‐inoculation, and lower in NORM than FIRO or INFECT at birth. Marginal mean allantoic IL‐β and IL‐10 concentrations were lower in FIRO and NORM than INFECT. Amniotic fluid cytokines were lowest in NORM with all measurements in that group being below the limit of detection. Allantoic PGF 2α concentrations were lower in FIRO and INFECT than NORM at 8 hours post‐inoculation, and lower in FIRO than INFECT or NORM at 24 hours post‐inoculation. Allantoic PGE 2 concentrations were lower in FIRO than INFECT. Amniotic PGF 2α and PGE 2 concentrations were lower in NORM than INFECT. In fetal membranes, group differences with respect to IL‐1β, IL‐6, IL‐8, and MMP1 were dependent on tissue type. Conclusions Data suggest a suppressive effect of firocoxib administration on cytokine and prostaglandin production in mares with placentitis.