This study aimed to evaluate the effects of dietary yeast culture(YC)on lipopolysaccharide(LPS)-induced oxidative stress,immune and inflammatory response in P.ussuriensis.The fish were randomly assigned into three gro...This study aimed to evaluate the effects of dietary yeast culture(YC)on lipopolysaccharide(LPS)-induced oxidative stress,immune and inflammatory response in P.ussuriensis.The fish were randomly assigned into three groups as the control group,LPS group and YC+LPS group.The fish in the control were fed diet with no YC supplementation and no LPS challenge,and the fish in the LPS group or YC+LPS group were fed diet supplemented with no YC or 20 g·kg^(-1)YC,and with LPS challenge,respectively.The results showed that compared with the control group,intestinal total antioxidant capacity(T-AOC)level and superoxide dismutase(SOD)activity were significantly decreased,while intestinal malondialdehyde(MDA),plasma aspartate transaminase(AST)and alanine transaminase(ALT)levels were significantly increased in the LPS group(P<0.05).Besides,lower plasma alkaline phosphatase(ALP),alternative complement pathway(ACH50)activity and the albumin(ALB)level,as well as higher lysozyme(LZM)activity,were also found in the LPS group.However,dietary 20 g·kg^(-1)YC supplementation could relieve the above LPS-induced changes in Pseudobagrus ussuriensis.Furtherly,LPS challenge could significantly up-regulate gene expression of interleukin-8(IL-8),heat shock protein(HSP70)and NF-κBp65 except for toll-like receptors 2(TLR2),while dietary 20 g·kg^(-1)YC supplementation suppressed the increased expression of NF-κBp65 and IL-8 induced by LPS in P.ussuriensis.In summary,LPS challenge could induce immune impairment,oxidative stress and hepatic damage,and the protective effect of dietary 20 g·kg^(-1)YC supplementation on LPS-induced immune impairment and oxidative stress was observed in the present study,which was associated with the enhanced levels of antioxidant enzymes and immune parameters.Also,dietary 20 g·kg^(-1)YC supplementation could suppress LPS-induced inflammatory response by down-regulating NF-κBp65,HSP70 and IL-8 gene expression.展开更多
Yeast culture is a kind of green feed additive. It has been researched and applied widely in the feed industry. In this paper, the functions of yeast culture and its application in the actual production were discussed...Yeast culture is a kind of green feed additive. It has been researched and applied widely in the feed industry. In this paper, the functions of yeast culture and its application in the actual production were discussed. It can be concluded that yeast culture has a great application prospect.展开更多
The effects of yeast culture and directfed microbes on the growth performance of weaner lambs was examined. Thirty-two Hu lambs with inihtial weight of 22.20 （ ±0.75 ） kg were randomly assigned to one of four t...The effects of yeast culture and directfed microbes on the growth performance of weaner lambs was examined. Thirty-two Hu lambs with inihtial weight of 22.20 （ ±0.75 ） kg were randomly assigned to one of four treatments： basal diet without additive （control）, added with yeast culture at 15 g/head/d （YEC）, YEC plus Bacillus licheniformis preparation at 2. 3 g/head/d （YBL） or plus Clostridium butyricum preparation at 2. 3 g/head/d （YCB）. The feeding trial lasted 75 d with 15 d for adaptation. Feed intake was not influenced （P 〉0. 05） by treatment. Average daily gain of growing lambs was 102, 114, 90, and 89 g/d in control, YEC, YBL, and YCB, respectively, with no significant difference （P 〉 0.05） among treatments, but the carcass weight of YEC lambs was significantly higher （P 〈 0.05） than that of other treatments. Total volatile fatty acids and acetate to propionate ratio in the rumen were unaffected, although the butyric acid concentration was higher （ P 〈 0.05 ） in the ru men fluid of YCB lambs compared with YEC lambs and slightly higher （ P 〉 0. 05 ） than in controls and YBL lambs. Solid-associated fungi population relative to total rumen bacteria 16S ribosomal DNA was significantly lower （ P 〈 0. 05 ） in YBL lambs （3.55） compared with those on YCB （23.12）. There was little difference in blood glucose and plasma urea-N concentrations among the treatments. Blood concentrations of creatinine and globulin were significantly higher （P 〈0.05） in YBL lambs, compared with the control and YEC-fed animals, and no difference with YCB lambs. Total protein and triglycerides in blood were significantly （P 〈 0.05） higher in YBL lambs, compared with controls. These serum biochemical parameters suggest that treatment increased amounts of absorbable protein but not efficiency of protein utilization and in YBL and YCB lambs. The results indicated that yeast culture improve growth performance, while little advantage could be expected from combining yeast culture with either the B. licheniformis preparation or C. butyricum preparation. More research using lower doses of B. licheniformis prepara- tion or C. butyricum preparation in combination with yeast culture is warranted.展开更多
Culture condition of every phase for fermentation of yeast culture was studied, and its solid and liquid conditions of elaboration were optimized to improve the total counts of living cells. Results showed that microz...Culture condition of every phase for fermentation of yeast culture was studied, and its solid and liquid conditions of elaboration were optimized to improve the total counts of living cells. Results showed that microzyme grew best at 30℃ when solid fermented, and the count of the living cells reached the tiptop with pH 5.5. The count of Candida tropicalis could reach 137.96× 10^9 cfu·g^-1, the count of Saccharomyces cerevisia could reach 134.62× 10^9 cfu·g^-1 the best liquid fermentation condition for cell-wall broken was 50℃ for 28 h, the rate of cell-wall broken could reach 80% at least; the rate of vitamin loss in yeast could be the minimun, the loss rate of vitamin B6 in Candida tropicalis and Saccharomyces cerevisiae was 8.71% and 19.54% respectively, the loss rate of vitamin B2 was 19.39% and 13.18%, respectively, and the loss rate of vitamin B6 was 6.3% and 3.04%, respectively.展开更多
Objective: To evaluate the impact of plant growth regulators including kinetin(KN),benzyl adenine and naphthalene acetic acid, yeast extract and casein hydrolyzate on biomass accumulation of Vietnamese ginseng Panax v...Objective: To evaluate the impact of plant growth regulators including kinetin(KN),benzyl adenine and naphthalene acetic acid, yeast extract and casein hydrolyzate on biomass accumulation of Vietnamese ginseng Panax vietnamensis(P. vietnamensis) in cell suspension culture.Methods: Cell suspension cultures were established from friable calluses derived from leaves and petioles of 3-year-old in-vitro P. vietnamensis plants. The cell suspension cultures were grown in Murashige and Skoog basal media supplemented with various concentrations of KN, benzyl adenine, naphthalene acetic acid, and yeast extract and casein hydrolyzate.Results: All tested factors generated an increase in the cell biomass of P. vietnamensis in suspension culture, but the impact of each varies depended on the factor type, concentration, and incubation period. Addition of 2.0 mg/L KN resulted in the largest biomass increase after 24 d,(57.0 ± 0.9) and(3.1 ± 0.1) mg/m L fresh and dry weight, respectively,whereas addition of benzyl adenine or naphthalene acetic acid produced optimum levels of Panax cell biomass at 1.0 and 1.5 mg/L, respectively. Addition of the elicitor yeast extract led to a 1.4–2.4 fold increase in biomass of P. vietnamensis, while addition of casein hydrolyzate enhanced biomass accumulation 1.8–2.6 fold.Conclusions: The addition of each factor causes significant changes in biomass accumulation of P. vietnamensis. The largest biomass accumulation is from cultures grown in MS media containing 2.0 mg/L KN for 24 d. The outcome of the present study provides new insights into the optimal suspension culture conditions for studies on the in vitro cell biomass production of P. vietnamensis.展开更多
Yeast of Saccharomyces cerevisiae（SCY） origin has over long time been incorporated into domestic animal diets. In calves, several products have offered improved performance and health. Although several types of rese...Yeast of Saccharomyces cerevisiae（SCY） origin has over long time been incorporated into domestic animal diets. In calves, several products have offered improved performance and health. Although several types of research have been completed, the mode of action of SCY is not clear in calves. Under this review, we have highlighted the works available in the literature on the use of SCY in calves performance, health, immunity, and the gut environment. Both active live yeast and yeast culture have positive effects on growth, rumen, small intestines, immunity and general health of the calf. Specifically, SCY can improve DMI, growth, feed efficiency and reduce diarrhea in calves. Furthermore, subtle improvements are seen in rumen fermentation（increased butyrate production） and rumen papillae growth. These positive results are, however, more pronounced in calves that are under stress or exposed to significant levels of disease-causing agents. There is a need for further research in areas such as gut morphology, gut microbiology and immunity using latest molecular methods to fully understand how SCY helps the growth and development of calves.展开更多
【目的】比较两种酵母培养物及其代谢成分的差异,为指导酵母培养物的生产及应用提供参考。【方法】材料为1种自研酵母培养物与达农威益康XP酵母培养物,利用非靶标代谢组学UHPLC-QTOF-MS技术,分析比较二者代谢产物成分及差异。【结果】(1...【目的】比较两种酵母培养物及其代谢成分的差异,为指导酵母培养物的生产及应用提供参考。【方法】材料为1种自研酵母培养物与达农威益康XP酵母培养物,利用非靶标代谢组学UHPLC-QTOF-MS技术,分析比较二者代谢产物成分及差异。【结果】(1)在二级类别注释下,正、负离子模式分别注释到614、497个化合物,主要代谢类别为有机酸,核苷、核苷酸及其衍生物,氨基酸及其衍生物,两种酵母培养物均无特有代谢成分,只在含量上有显著(P<0.05)差异。(2)共237个差异代谢物在正离子模式检出,176个显著(P<0.05)上调表达,61个显著(P<0.05)下调表达;136个差异代谢物在负离子模式检出,64个显著(P<0.05)上调表达,72个显著(P<0.05)下调表达。(3)差异代谢物的KEGG(Kyoto Encyclopedia of Genes and Genomes)富集分析主要集中在丙氨酸、天冬氨酸和谷氨酸等代谢通路。【结论】自研酵母培养物与达农威益康XP的代谢产物含量存在显著差异,但其发酵原料及工艺更简便,并含有多种具药理、生理作用的代谢成分,有潜在应用价值。展开更多
This study was conducted to investigate the effects of dietary supplementation with yeast culture(YC)and organic selenium(Se)during late gestation and lactation on reproductive performance,milk quality,piglet preweani...This study was conducted to investigate the effects of dietary supplementation with yeast culture(YC)and organic selenium(Se)during late gestation and lactation on reproductive performance,milk quality,piglet preweaning performance,antioxidant capacity,and secretion of immunoglobulin in multiparous sows.A total of 160 healthy cross-bred sows(Landrace×Yorkshire,mean parity 4.1±0.3)were randomly assigned to 4 groups as follows:1)high nutrient(HN),3,420 kcal/kg digestible energy(DE)and 18.0%crude protein(CP);2)low nutrient(LN),3,240 kcal/kg DE and 16.0%CP;3)LN+YC,LN diet+10 g/kg YC;4)LN+YC+Se,LN diet+10 g/kg YC+organic Se(1 mg/kg Se).Feeding trials of sows started from d 85 of pregnancy to d 35 of lactation.Compared with sows in the LN group,sows fed the LN+YC+Se diet had greater litter weaning weight,average litter gain,and milk fat content(14-d and25-d milk)(P<0.05).The content of malonaldehyde(MDA)(colostrum and 14-d milk)was lesser,and the activity of glutathione peroxidase(GSH-Px)(colostrum and 25-d milk)was greater when sows were fed the LN+YC+Se diet,compared with sows fed the LN diet(P<0.05).Supplementation of YC and organic Se in the nutrient-restricted diet improved sows’reproductive performance and pig weaning body weight by enhancing the antioxidant capacity and fat content in milk.展开更多
基金Supported by the Special Fund for Beijing Enhalor Bio-Tech Co.,Ltd.the Open Fund for National Engineering Research Laboratory of Marine Biotechnology and Engineering,Ningbo Universitythe Entrepreneurship Trainning Project of SIPT Program of Northeast Agricultural University(202310224129S)。
文摘This study aimed to evaluate the effects of dietary yeast culture(YC)on lipopolysaccharide(LPS)-induced oxidative stress,immune and inflammatory response in P.ussuriensis.The fish were randomly assigned into three groups as the control group,LPS group and YC+LPS group.The fish in the control were fed diet with no YC supplementation and no LPS challenge,and the fish in the LPS group or YC+LPS group were fed diet supplemented with no YC or 20 g·kg^(-1)YC,and with LPS challenge,respectively.The results showed that compared with the control group,intestinal total antioxidant capacity(T-AOC)level and superoxide dismutase(SOD)activity were significantly decreased,while intestinal malondialdehyde(MDA),plasma aspartate transaminase(AST)and alanine transaminase(ALT)levels were significantly increased in the LPS group(P<0.05).Besides,lower plasma alkaline phosphatase(ALP),alternative complement pathway(ACH50)activity and the albumin(ALB)level,as well as higher lysozyme(LZM)activity,were also found in the LPS group.However,dietary 20 g·kg^(-1)YC supplementation could relieve the above LPS-induced changes in Pseudobagrus ussuriensis.Furtherly,LPS challenge could significantly up-regulate gene expression of interleukin-8(IL-8),heat shock protein(HSP70)and NF-κBp65 except for toll-like receptors 2(TLR2),while dietary 20 g·kg^(-1)YC supplementation suppressed the increased expression of NF-κBp65 and IL-8 induced by LPS in P.ussuriensis.In summary,LPS challenge could induce immune impairment,oxidative stress and hepatic damage,and the protective effect of dietary 20 g·kg^(-1)YC supplementation on LPS-induced immune impairment and oxidative stress was observed in the present study,which was associated with the enhanced levels of antioxidant enzymes and immune parameters.Also,dietary 20 g·kg^(-1)YC supplementation could suppress LPS-induced inflammatory response by down-regulating NF-κBp65,HSP70 and IL-8 gene expression.
文摘Yeast culture is a kind of green feed additive. It has been researched and applied widely in the feed industry. In this paper, the functions of yeast culture and its application in the actual production were discussed. It can be concluded that yeast culture has a great application prospect.
基金supported by the earmarked fund from China Agriculture Research System,Ministry of Agriculture,China(CARS-372)
文摘The effects of yeast culture and directfed microbes on the growth performance of weaner lambs was examined. Thirty-two Hu lambs with inihtial weight of 22.20 （ ±0.75 ） kg were randomly assigned to one of four treatments： basal diet without additive （control）, added with yeast culture at 15 g/head/d （YEC）, YEC plus Bacillus licheniformis preparation at 2. 3 g/head/d （YBL） or plus Clostridium butyricum preparation at 2. 3 g/head/d （YCB）. The feeding trial lasted 75 d with 15 d for adaptation. Feed intake was not influenced （P 〉0. 05） by treatment. Average daily gain of growing lambs was 102, 114, 90, and 89 g/d in control, YEC, YBL, and YCB, respectively, with no significant difference （P 〉 0.05） among treatments, but the carcass weight of YEC lambs was significantly higher （P 〈 0.05） than that of other treatments. Total volatile fatty acids and acetate to propionate ratio in the rumen were unaffected, although the butyric acid concentration was higher （ P 〈 0.05 ） in the ru men fluid of YCB lambs compared with YEC lambs and slightly higher （ P 〉 0. 05 ） than in controls and YBL lambs. Solid-associated fungi population relative to total rumen bacteria 16S ribosomal DNA was significantly lower （ P 〈 0. 05 ） in YBL lambs （3.55） compared with those on YCB （23.12）. There was little difference in blood glucose and plasma urea-N concentrations among the treatments. Blood concentrations of creatinine and globulin were significantly higher （P 〈0.05） in YBL lambs, compared with the control and YEC-fed animals, and no difference with YCB lambs. Total protein and triglycerides in blood were significantly （P 〈 0.05） higher in YBL lambs, compared with controls. These serum biochemical parameters suggest that treatment increased amounts of absorbable protein but not efficiency of protein utilization and in YBL and YCB lambs. The results indicated that yeast culture improve growth performance, while little advantage could be expected from combining yeast culture with either the B. licheniformis preparation or C. butyricum preparation. More research using lower doses of B. licheniformis prepara- tion or C. butyricum preparation in combination with yeast culture is warranted.
基金Program of Harbin Tackle Key Problem(2004AA6BNO20)
文摘Culture condition of every phase for fermentation of yeast culture was studied, and its solid and liquid conditions of elaboration were optimized to improve the total counts of living cells. Results showed that microzyme grew best at 30℃ when solid fermented, and the count of the living cells reached the tiptop with pH 5.5. The count of Candida tropicalis could reach 137.96× 10^9 cfu·g^-1, the count of Saccharomyces cerevisia could reach 134.62× 10^9 cfu·g^-1 the best liquid fermentation condition for cell-wall broken was 50℃ for 28 h, the rate of cell-wall broken could reach 80% at least; the rate of vitamin loss in yeast could be the minimun, the loss rate of vitamin B6 in Candida tropicalis and Saccharomyces cerevisiae was 8.71% and 19.54% respectively, the loss rate of vitamin B2 was 19.39% and 13.18%, respectively, and the loss rate of vitamin B6 was 6.3% and 3.04%, respectively.
基金the Ministry of Science and Technology,Vietnam for financial support
文摘Objective: To evaluate the impact of plant growth regulators including kinetin(KN),benzyl adenine and naphthalene acetic acid, yeast extract and casein hydrolyzate on biomass accumulation of Vietnamese ginseng Panax vietnamensis(P. vietnamensis) in cell suspension culture.Methods: Cell suspension cultures were established from friable calluses derived from leaves and petioles of 3-year-old in-vitro P. vietnamensis plants. The cell suspension cultures were grown in Murashige and Skoog basal media supplemented with various concentrations of KN, benzyl adenine, naphthalene acetic acid, and yeast extract and casein hydrolyzate.Results: All tested factors generated an increase in the cell biomass of P. vietnamensis in suspension culture, but the impact of each varies depended on the factor type, concentration, and incubation period. Addition of 2.0 mg/L KN resulted in the largest biomass increase after 24 d,(57.0 ± 0.9) and(3.1 ± 0.1) mg/m L fresh and dry weight, respectively,whereas addition of benzyl adenine or naphthalene acetic acid produced optimum levels of Panax cell biomass at 1.0 and 1.5 mg/L, respectively. Addition of the elicitor yeast extract led to a 1.4–2.4 fold increase in biomass of P. vietnamensis, while addition of casein hydrolyzate enhanced biomass accumulation 1.8–2.6 fold.Conclusions: The addition of each factor causes significant changes in biomass accumulation of P. vietnamensis. The largest biomass accumulation is from cultures grown in MS media containing 2.0 mg/L KN for 24 d. The outcome of the present study provides new insights into the optimal suspension culture conditions for studies on the in vitro cell biomass production of P. vietnamensis.
基金supported by Beijing Agricultural Committee(20160146)Tianjin Commission of Science and Technology(15YFXQNC00020)+1 种基金National Dairy Industry and Technology System(CARS-37)Key Technologies R&D Program of China(2012BAD12B06)
文摘Yeast of Saccharomyces cerevisiae（SCY） origin has over long time been incorporated into domestic animal diets. In calves, several products have offered improved performance and health. Although several types of research have been completed, the mode of action of SCY is not clear in calves. Under this review, we have highlighted the works available in the literature on the use of SCY in calves performance, health, immunity, and the gut environment. Both active live yeast and yeast culture have positive effects on growth, rumen, small intestines, immunity and general health of the calf. Specifically, SCY can improve DMI, growth, feed efficiency and reduce diarrhea in calves. Furthermore, subtle improvements are seen in rumen fermentation（increased butyrate production） and rumen papillae growth. These positive results are, however, more pronounced in calves that are under stress or exposed to significant levels of disease-causing agents. There is a need for further research in areas such as gut morphology, gut microbiology and immunity using latest molecular methods to fully understand how SCY helps the growth and development of calves.
文摘【目的】比较两种酵母培养物及其代谢成分的差异,为指导酵母培养物的生产及应用提供参考。【方法】材料为1种自研酵母培养物与达农威益康XP酵母培养物,利用非靶标代谢组学UHPLC-QTOF-MS技术,分析比较二者代谢产物成分及差异。【结果】(1)在二级类别注释下,正、负离子模式分别注释到614、497个化合物,主要代谢类别为有机酸,核苷、核苷酸及其衍生物,氨基酸及其衍生物,两种酵母培养物均无特有代谢成分,只在含量上有显著(P<0.05)差异。(2)共237个差异代谢物在正离子模式检出,176个显著(P<0.05)上调表达,61个显著(P<0.05)下调表达;136个差异代谢物在负离子模式检出,64个显著(P<0.05)上调表达,72个显著(P<0.05)下调表达。(3)差异代谢物的KEGG(Kyoto Encyclopedia of Genes and Genomes)富集分析主要集中在丙氨酸、天冬氨酸和谷氨酸等代谢通路。【结论】自研酵母培养物与达农威益康XP的代谢产物含量存在显著差异,但其发酵原料及工艺更简便,并含有多种具药理、生理作用的代谢成分,有潜在应用价值。
基金supported by National Key R&D Program of China(No.2018YFD0500600)National Natural Science Foundation of the P.R.of China(No.31872364 and No.31802067)the Natural Science Foundation of Guangdong Province(No.2018A030310201)
文摘This study was conducted to investigate the effects of dietary supplementation with yeast culture(YC)and organic selenium(Se)during late gestation and lactation on reproductive performance,milk quality,piglet preweaning performance,antioxidant capacity,and secretion of immunoglobulin in multiparous sows.A total of 160 healthy cross-bred sows(Landrace×Yorkshire,mean parity 4.1±0.3)were randomly assigned to 4 groups as follows:1)high nutrient(HN),3,420 kcal/kg digestible energy(DE)and 18.0%crude protein(CP);2)low nutrient(LN),3,240 kcal/kg DE and 16.0%CP;3)LN+YC,LN diet+10 g/kg YC;4)LN+YC+Se,LN diet+10 g/kg YC+organic Se(1 mg/kg Se).Feeding trials of sows started from d 85 of pregnancy to d 35 of lactation.Compared with sows in the LN group,sows fed the LN+YC+Se diet had greater litter weaning weight,average litter gain,and milk fat content(14-d and25-d milk)(P<0.05).The content of malonaldehyde(MDA)(colostrum and 14-d milk)was lesser,and the activity of glutathione peroxidase(GSH-Px)(colostrum and 25-d milk)was greater when sows were fed the LN+YC+Se diet,compared with sows fed the LN diet(P<0.05).Supplementation of YC and organic Se in the nutrient-restricted diet improved sows’reproductive performance and pig weaning body weight by enhancing the antioxidant capacity and fat content in milk.
