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Effect of feeding spent coffee grounds on the methane production in bovine rumen

100%
Yamada K., Kawai K., Inui Y., Oda K., Kurumisawa T., Shimizu Y., Shinozuka Y.
Polish Journal of Veterinary Sciences
|
2024
|
tom 27
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nr 2
The environmental impact of methane, a greenhouse gas emitted from ruminants, is a pressing issue and methods to control methane emissions from ruminants are being investigated worldwide. In this study, we investigated the effects of the administration of spent coffee grounds (SCG) on methane production in the rumen in two cows. In the control condition (days 1 and 2), the cows were fed a basic diet twice daily (roughage and concentrate), and in the SCG condition (days 1 and 2) sequentially, the cows were fed the same basic diet and administered SCG into the rumen twice daily. The methane and carbon dioxide concentrations in rumen gas were measured via a fistula after feeding on days 2 in both cases of the study. The measurements were made using a newly developed gas measurement system with a portable gas monitor, and data were obtained for the control condition and SCG condition at each measurement time. The methane ratio at each measurement time was calculated from the methane and carbon dioxide concentrations, and compared between the two conditions. Statistical analysis showed no significant difference between the two conditions in the methane ratios after the morning (P=0.108) and afternoon feedings (P=0.345). However, the methane ratios before the morning (P=0.043) and afternoon feedings (P=0.008) were significantly lower in the SCG condition than in the control condition, suggesting that the administration of SCG may suppress methane production in the rumen.
2
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Anti-inflammatory effects of glycyrrhizin on lipoteichoic acid and lipopolysaccharide-induced bovine mastitis

84%
Kurumisawa T., Kazama K., Gondaira S., Higuchi H., Eguchi A., Onda K., Roh S. G., Kawai K.
Polish Journal of Veterinary Sciences
|
2025
|
tom 28
|
nr 1
Bovine mastitis is primarily treated with antimicrobial agents. Anti-inflammatory agents are also used to alleviate clinical symptoms or reduce antimicrobial use. Glycyrrhizin is an anti-inflammatory agent used in the treatment of bovine mastitis, but its effects are not fully understood. We therefore examined the anti-inflammatory effects of glycyrrhizin both in vivo and in vitro. We first tested whether glycyrrhizin exerts anti-inflammatory effects using MAC-T cells, an immortalized bovine mammary epithelial cell line. Glycyrrhizin decreased the expression of interleukin (IL)-1β mRNA in a concentration-dependent manner in MAC-T cells stimulated with lipoteichoic acid (LTA). We then investigated the effects of glycyrrhizin in bovine mammary epithelial cells (bMECs), which seem to retain more of the characteristics of actual mammary epithelial cells. Stimulation with LTA or lipopolysaccharide significantly increased cytokine mRNA expression in bMECs. Glycyrrhizin exhibited a slight inhibitory effect, but no significant difference was observed. The effect of glycyrrhizin on LTA-induced mastitis was examined in lactating cows. Quarters were divided into test and control areas (test quarter: n=8, control quarter: n=7). All quarters were stimulated with LTA at the start of the trial (0 h). In the test quarter group, glycyrrhizin was administered via intramammary infusion. The somatic cell count and relative gene expression of IL-1β and tumor necrosis factor–α were significantly lower in test quarters than control quarters. Both the in vitro and in vivo studies showed that glycyrrhizin reduces the expression of proinflammatory cytokine genes in response to LTA-induced inflammation and partially revealed the mechanism of the anti-inflammatory effect of glycyrrhizin on mastitis. Further investigations involving field cases of mastitis with bacterial infections are needed to demonstrate the anti-inflammatory effect of glycyrrhizin on bovine mastitis.
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