Recent studies have shown that age-related aging evolution is accompanied by imbalances in intestinal homeostasis.Marine red yeast(MRY)is a functional probiotic that has been shown to have antioxidant,immune and other...Recent studies have shown that age-related aging evolution is accompanied by imbalances in intestinal homeostasis.Marine red yeast(MRY)is a functional probiotic that has been shown to have antioxidant,immune and other properties.Therefore,we chose 900 healthy Hy-Line Brown hens at 433 d old as the research subjects and evaluated the correlation between intestinal health,laying performance,and egg quality in aged hens through the supplementation of MRY.These laying hens were assigned into 5 groups and received diet supplementation with 0%,0.5%,1.0%,1.5%,and 2%MRY for 12 weeks.The results showed that MRY supplementation increased egg production rate,average egg weight,and egg quality,and decreased feed conversion ratio and daily feed intake(P<0.05).The MRY supplement improved antioxidant indicators such as superoxide dismutase(SOD),catalase(CAT),glutathione peroxidase(GSH-Px),stimulated villus height,and increased the villus height to crypt depth ratio(V/C ratio)in the intestine(P<0.05).It also regulated the expression of intestinal inflammatory factors(transforming growth factor-β[TGF-β],interleukin[IL]-1β,IL-8,tumor necrosis factor-α[TNF-α])while increasing serum immunoglobulin G(IgG)levels(P<0.05).Furthermore,MRY supplementation upregulated the mRNA expression of tight junction proteins(occludin and zonula occludens-1[ZO-1]),anti-apoptotic gene(Bcl-2),and autophagy-related proteins(beclin-1 and light chain 3I[LC3I])in the intestine(P<0.05).The MRY supplement also led to an increase in the concentration of short-chain fatty acids in the cecum,and the relative abundance of the phylum Bacteroidetes,and genera Bacteroides and Rikenellaceae_RC9_gut_group.The LEfSe analysis revealed an enrichment of Sutterella and Akkermansia muciniphila.In conclusion,the results of this experiment indicated that the additional supplementation of MRY can improve the production performance of laying hens and may contribute to the restoration and balance of intestinal homeostasis,which supports the application potential of MRY as a green and efficient feed additive for improving the laying performance in chickens.展开更多
After a serial of UV, EMS and NTG mutagenesis, a mutant named MM of the red marine yeast strain Rhodotorula sp. hidai was obtained. The mutant MM could produce 603.93 μg g-1 of carotenoid within 5 days in the medium ...After a serial of UV, EMS and NTG mutagenesis, a mutant named MM of the red marine yeast strain Rhodotorula sp. hidai was obtained. The mutant MM could produce 603.93 μg g-1 of carotenoid within 5 days in the medium containing 4.0 g sucrose, 1.5 g yeast extract, 0.1 g MgSO4, and 100 mL of sea water, with pH 6.0 and at 30 ℃, while only 213.18 μg g-1 of carotenoid was pro-duced by the wild type under the same conditions.展开更多
基金supported by the Science and Technology Research and Develo pment Program Joint Fund of Henan Province (232103810013)Major Scientific and Technological Special Project of Henan Province (221100110200)the China Agniculture Research Systems of Ministry of Finance and Ministry of Agriculture and Rural Affairs of China (CARS-40).
文摘Recent studies have shown that age-related aging evolution is accompanied by imbalances in intestinal homeostasis.Marine red yeast(MRY)is a functional probiotic that has been shown to have antioxidant,immune and other properties.Therefore,we chose 900 healthy Hy-Line Brown hens at 433 d old as the research subjects and evaluated the correlation between intestinal health,laying performance,and egg quality in aged hens through the supplementation of MRY.These laying hens were assigned into 5 groups and received diet supplementation with 0%,0.5%,1.0%,1.5%,and 2%MRY for 12 weeks.The results showed that MRY supplementation increased egg production rate,average egg weight,and egg quality,and decreased feed conversion ratio and daily feed intake(P<0.05).The MRY supplement improved antioxidant indicators such as superoxide dismutase(SOD),catalase(CAT),glutathione peroxidase(GSH-Px),stimulated villus height,and increased the villus height to crypt depth ratio(V/C ratio)in the intestine(P<0.05).It also regulated the expression of intestinal inflammatory factors(transforming growth factor-β[TGF-β],interleukin[IL]-1β,IL-8,tumor necrosis factor-α[TNF-α])while increasing serum immunoglobulin G(IgG)levels(P<0.05).Furthermore,MRY supplementation upregulated the mRNA expression of tight junction proteins(occludin and zonula occludens-1[ZO-1]),anti-apoptotic gene(Bcl-2),and autophagy-related proteins(beclin-1 and light chain 3I[LC3I])in the intestine(P<0.05).The MRY supplement also led to an increase in the concentration of short-chain fatty acids in the cecum,and the relative abundance of the phylum Bacteroidetes,and genera Bacteroides and Rikenellaceae_RC9_gut_group.The LEfSe analysis revealed an enrichment of Sutterella and Akkermansia muciniphila.In conclusion,the results of this experiment indicated that the additional supplementation of MRY can improve the production performance of laying hens and may contribute to the restoration and balance of intestinal homeostasis,which supports the application potential of MRY as a green and efficient feed additive for improving the laying performance in chickens.
文摘After a serial of UV, EMS and NTG mutagenesis, a mutant named MM of the red marine yeast strain Rhodotorula sp. hidai was obtained. The mutant MM could produce 603.93 μg g-1 of carotenoid within 5 days in the medium containing 4.0 g sucrose, 1.5 g yeast extract, 0.1 g MgSO4, and 100 mL of sea water, with pH 6.0 and at 30 ℃, while only 213.18 μg g-1 of carotenoid was pro-duced by the wild type under the same conditions.
