为了探究草菇子实体多肽(Volvariella volvacea fruit body polypeptides,VVFP)对模型小鼠急性酒精肝预防作用及肠道菌群的影响,以先前获得的VVFP(分子质量1~3 kDa)为材料灌胃小鼠,将小鼠随机分为空白组、模型组、阳性对照组、多肽低剂...为了探究草菇子实体多肽(Volvariella volvacea fruit body polypeptides,VVFP)对模型小鼠急性酒精肝预防作用及肠道菌群的影响,以先前获得的VVFP(分子质量1~3 kDa)为材料灌胃小鼠,将小鼠随机分为空白组、模型组、阳性对照组、多肽低剂量组、多肽中剂量组、多肽高剂量组,比较各组小鼠的血清和肝脏指标以及组织病理切片,利用16S rDNA基因高通量测序分析各样品中微生物菌群的生物多样性以及在门和属水平上的相对丰度。结果表明,与模型组相比,VVFP能够极显著降低血清中甘油三酯、总胆固醇、谷丙转氨酶、谷草转氨酶水平和肝脏中丙二醛的含量,并且降低肿瘤坏死因子-α、白细胞介素-6炎症因子水平,同时明显提高肝脏中乙醇脱氢酶、总超氧化物歧化酶和谷胱甘肽过氧化物酶的活性。16S rDNA基因高通量测序结果表明,VVFP可以使小鼠肠道菌群中α多样性的Chao1指数和Observed_species指数明显降低,Shannon指数升高,并可通过调节拟杆菌门、厚壁菌门、链霉菌属、乳酸杆菌属和弧菌属的丰度从而减轻小鼠肝脏的损伤程度。综上,VVFP可以减轻酒精引起的肝损伤,本研究可为多肽在功能食品领域的应用提供理论参考。展开更多
为了筛选合适的草菇液体菌种培养条件,本实验设计三个配方进行草菇液体菌种摇床培养对比试验,筛选出适宜的培养基配方,即马铃薯50 g,葡萄糖20 g,蛋白胨1.5 g,KH2PO4 1 g,MgSO4 0.5 g,维生素B1 10 mg,水1000 mL,pH自然。在此基础上设计...为了筛选合适的草菇液体菌种培养条件,本实验设计三个配方进行草菇液体菌种摇床培养对比试验,筛选出适宜的培养基配方,即马铃薯50 g,葡萄糖20 g,蛋白胨1.5 g,KH2PO4 1 g,MgSO4 0.5 g,维生素B1 10 mg,水1000 mL,pH自然。在此基础上设计摇床转速、维生素B1添加浓度、培养基装瓶量、摇前静置时间等四个因子,进行草菇液体菌种摇床培养的比较试验。结果表明,草菇液体菌种培养最适合的摇床转速是130 r/min;添加的维生素B1的最佳浓度为15 mg/L;规格为250 mL的锥形瓶,培养基的最适装瓶量为80 mL;培养基静置36 h再进行摇床培养效果最好。In order to screen suitable culture conditions of liquid strains for Volvariella volvacea, this experiment designed three formulas for comparative shaking table cultivation of V. volvacea liquid strains. The suitable medium formula was selected, namely 50 g of potato, 20 g of glucose, 1.5 g of peptone, 1 g of KH2PO4, 0.5 g of MgSO4, 10 mg of Vitamin B1, 1000 mL of water, and natural pH. On this basis, four factors were designed, including shaking table speed, vitamin B1 addition concentration, bottling volume of culture medium, and settling time before shaking, to conduct comparative experiments on V. volvacea liquid strain shaking table cultivation. The results showed that the most suitable shaking table speed for the cultivation of V. volvacea liquid strains was 130 r/min;the optimal concentration of added vitamin B1 was 15 mg/L;the optimal filling volume for a 250 mL conical flask and culture medium was 80 mL;the best effect was to let the culture medium stand for 36 hours before shaking it on a shaker.展开更多
文摘为了探究草菇子实体多肽(Volvariella volvacea fruit body polypeptides,VVFP)对模型小鼠急性酒精肝预防作用及肠道菌群的影响,以先前获得的VVFP(分子质量1~3 kDa)为材料灌胃小鼠,将小鼠随机分为空白组、模型组、阳性对照组、多肽低剂量组、多肽中剂量组、多肽高剂量组,比较各组小鼠的血清和肝脏指标以及组织病理切片,利用16S rDNA基因高通量测序分析各样品中微生物菌群的生物多样性以及在门和属水平上的相对丰度。结果表明,与模型组相比,VVFP能够极显著降低血清中甘油三酯、总胆固醇、谷丙转氨酶、谷草转氨酶水平和肝脏中丙二醛的含量,并且降低肿瘤坏死因子-α、白细胞介素-6炎症因子水平,同时明显提高肝脏中乙醇脱氢酶、总超氧化物歧化酶和谷胱甘肽过氧化物酶的活性。16S rDNA基因高通量测序结果表明,VVFP可以使小鼠肠道菌群中α多样性的Chao1指数和Observed_species指数明显降低,Shannon指数升高,并可通过调节拟杆菌门、厚壁菌门、链霉菌属、乳酸杆菌属和弧菌属的丰度从而减轻小鼠肝脏的损伤程度。综上,VVFP可以减轻酒精引起的肝损伤,本研究可为多肽在功能食品领域的应用提供理论参考。
文摘为了筛选合适的草菇液体菌种培养条件,本实验设计三个配方进行草菇液体菌种摇床培养对比试验,筛选出适宜的培养基配方,即马铃薯50 g,葡萄糖20 g,蛋白胨1.5 g,KH2PO4 1 g,MgSO4 0.5 g,维生素B1 10 mg,水1000 mL,pH自然。在此基础上设计摇床转速、维生素B1添加浓度、培养基装瓶量、摇前静置时间等四个因子,进行草菇液体菌种摇床培养的比较试验。结果表明,草菇液体菌种培养最适合的摇床转速是130 r/min;添加的维生素B1的最佳浓度为15 mg/L;规格为250 mL的锥形瓶,培养基的最适装瓶量为80 mL;培养基静置36 h再进行摇床培养效果最好。In order to screen suitable culture conditions of liquid strains for Volvariella volvacea, this experiment designed three formulas for comparative shaking table cultivation of V. volvacea liquid strains. The suitable medium formula was selected, namely 50 g of potato, 20 g of glucose, 1.5 g of peptone, 1 g of KH2PO4, 0.5 g of MgSO4, 10 mg of Vitamin B1, 1000 mL of water, and natural pH. On this basis, four factors were designed, including shaking table speed, vitamin B1 addition concentration, bottling volume of culture medium, and settling time before shaking, to conduct comparative experiments on V. volvacea liquid strain shaking table cultivation. The results showed that the most suitable shaking table speed for the cultivation of V. volvacea liquid strains was 130 r/min;the optimal concentration of added vitamin B1 was 15 mg/L;the optimal filling volume for a 250 mL conical flask and culture medium was 80 mL;the best effect was to let the culture medium stand for 36 hours before shaking it on a shaker.
