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• W2891475910 abstract "Nonsteroidal anti-inflammatory drugs are commonly administered parenterally in addition to antimicrobial mastitis therapy to increase the well-being of the diseased animal. As mastitis is usually a localized infection of mammary tissue, we tested the hypothesis that a local administration of nonsteroidal anti-inflammatory drugs through the teat canal could have anti-inflammatory effects on the affected area. We investigated the effects of intramammarily administered ketoprofen (KET) during an LPS-induced immune response on somatic cell count (SCC) and blood–milk barrier integrity. In addition, we investigated the effects of KET on the mRNA abundance of immune factors and their prostaglandin E2 secretion in primary bovine mammary epithelial cells in vitro. Six cows received 0.2 µg of LPS (serotype O26:B6) together with 50 mg of KET into one quarter and LPS only in the opposing quarter. The increase of SCC and of serum albumin (SA) and IgG concentrations and the increase of lactate dehydrogenase (LDH) activity in milk induced by LPS were lower in quarters that received KET in addition. In 3 cows, intramammary KET (50 mg) without additional LPS did not affect SCC, SA, IgG, and LDH in milk. Effects of KET on the immune response of mammary epithelial cells in vitro were investigated in cells from 3 cows challenged with or without LPS (0.2 µg/mL) and with or without additional KET in 2 concentrations (1.25 or 2.5 mg/mL). Ketoprofen reduced the LPS-induced increase of mRNA abundance of tumor necrosis factor α, IL-8, serum amyloid A, and cyclooxygenase-2. The mRNA abundance of cyclooxygenase-1 and prostaglandin E synthase was reduced in cells without LPS challenge by addition of KET at 2.5 mg/mL. Furthermore, the LPS-induced secretion of prostaglandin E2 of mammary epithelial cells into the supernatant could not be detected if KET was added. The results demonstrate that intramammary KET diminishes the increase of SCC and reduces the impairment of the blood–milk barrier (based on SA and LDH in milk), leading to a reduced IgG concentration in milk during LPS-induced mastitis. In mammary epithelial cells, KET limits the expression of several immune factors that are increased during an immune response. In summary, intramammary administration of KET reduces the inflammatory response in the mammary gland. However, it remains unclear whether the inhibited transfer of immune cells and IgG from blood into milk after KET administration would reduce the success of the immune defense in infectious mastitis." @default.
• W2891475910 created "2018-09-27" @default.
• W2891475910 creator A5015725603 @default.
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• W2891475910 date "2018-12-01" @default.
• W2891475910 modified "2023-09-26" @default.
• W2891475910 title "Ketoprofen affects the mammary immune response in dairy cows in vivo and in vitro" @default.
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• W2891475910 doi "https://doi.org/10.3168/jds.2018-15034" @default.
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