Czech Journal of Animal Science, 2022 (vol. 67), issue 6
A meta-analysis of heat stress in dairy cattle: The increase in temperature humidity index affects both milk yield and some physiological parametersOriginal Paper
Ersin Kulaz, Gazel Ser
Czech J. Anim. Sci., 2022, 67(6):209-217 | DOI: 10.17221/1/2022-CJAS 
In this study, the relationships of temperature humidity index (THI) with milk yield and some physiological responses in dairy cattle were investigated. Our goal in the meta-analysis was to find the parameter(s) primarily affected under heat stress. A total of 16 studies with the temperature humidity index value higher than 72, which is an important factor in determining the effect of heat stress, were included in the meta-analysis. The variables of interest in the meta-analysis included: milk yield (kg/day), respiratory rate (breaths/min), rectal temperature (°C). In addition to the meta-analysis, principal component analysis (PCA) was also performed....
Effects of sweet potato vine silage supplementation on growth performance, nutrient digestibility, and intestinal health in finishing pigsOriginal Paper
Junjie Zhang, Zhiyuan Yue, Yuchen Sun, Zhishen Wang, Yiming Zhang, Libin Huang, Jinmin Tu, Baoming Shi, Anshan Shan, Qingquan Ma
Czech J. Anim. Sci., 2022, 67(6):218-227 | DOI: 10.17221/209/2021-CJAS
We investigated the effects of sweet potato vine silage (SPVS) supplementation on the growth performance, apparent digestibility and gut health of finishing pigs. 180 Bali Black pigs (Berkshire × Licha Black, with body weight of 74.54 ± 3.32 kg) were assigned to three groups: basal diet (Ctrl), Ctrl supplemented with 2.5% SPVS (Lspvs) and 5.0% SPVS (Hspvs). Animals were slaughtered after nine weeks of feeding. The results indicated that dietary SPVS supplementation improved average daily food intake and average daily gain. However, SPVS treatment decreased the apparent digestibility. Activities of antioxidant enzymes including...
L-Leucine stimulates proliferation and casein secretion in porcine mammary epithelial cells through mTOR-p70S6K-4EBP1 signalling pathwayOriginal Paper
Yutong Sun, Guohong Wang, Xinbo Zhou, Yuchen Sun, Qingquan Ma
Czech J. Anim. Sci., 2022, 67(6):228-236 | DOI: 10.17221/121/2021-CJAS
Milk production determines health status and optimal growth of suckling neonates. Recent studies revealed that the secretion of leucine into sow milk from the mammary gland is significantly lower than the amount taken up by the mammary gland from the blood, suggesting the potential and fundamental role in udder metabolism. However, little is known about the underlying mechanism. In this study, porcine mammary epithelial cells (PMECs) were employed to investigate the effects of leucine on protein synthesis and mammalian target of rapamycin (mTOR) signalling. Results showed that leucine supplementation significantly increased the proliferation of PMECs...
Novel circRNAs from cashmere goats: Discovery, integrated regulatory network, and their putative roles in the regeneration and growth of secondary hair folliclesOriginal Paper
Jincheng Shen, Yanru Wang, Man Bai, Yixing Fan, Zeying Wang, Wenlin Bai
Czech J. Anim. Sci., 2022, 67(6):237-251 | DOI: 10.17221/179/2021-CJAS
Circular RNAs (circRNAs) were identified as noncoding RNAs with covalently closed structures differing from other types of RNA molecules. It was thought that circRNAs were implicated in the development of secondary hair follicles (SHFs) of cashmere goats. In this investigation, a total of 21 novel circRNAs were identified from the skin tissue of cashmere goats. Of them, nine circRNAs were found to be significantly higher in expression at anagen skin tissue than those at telogen of cashmere goats. Based on bioinformatics analysis, a complicated regulatory relationship was revealed among the nine upregulated circRNAs at anagen with related signalling...