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
Objective:To evaluate the antifungal activity of four honeys of different types from Algeria against pathogenic yeast i.e.Candida albicans(C.albicans) and Rhoddtorula sp.Methods:Four Algeria honeys of different botani...Objective:To evaluate the antifungal activity of four honeys of different types from Algeria against pathogenic yeast i.e.Candida albicans(C.albicans) and Rhoddtorula sp.Methods:Four Algeria honeys of different botanical origin were analvzed to test anlilungal effect against C.albicans,and Rhodotorula sp.Different concentrations(undiluted,10%,30%,50%and 70%w/v) of honey were studied in vitro for their antifugal aclivity using C.albicans and Rhodotorula sp.as fungal strains.Results:The range of the c liameter of zone of inhibition of various concentrations ol tested honeys was(7-23 mm) for Rhodotorula sp.,while C.albicans showed clearly resistance towards all concentrations used.The MICs of tested honey concentrations against C.albicans and Rhodotorula sp.were(70.09-93.48)%and(4.90-99.70)%v/v,respectively.Conclusions:This study demonstrales that,in vitro,these natural products have clearly an antifungal activity against Rhodotorula sp.and C.albicans.展开更多
目的:探讨晚期糖基化终末产物受体(receptors for advanced glycation end products,RAGE)、表面活性蛋白D(surfactant protein D,SP-D)、血管生成素2(angiopoietin 2,ANG2)及高迁移率族蛋白B1(high mobility group protein B1,HMGB1)...目的:探讨晚期糖基化终末产物受体(receptors for advanced glycation end products,RAGE)、表面活性蛋白D(surfactant protein D,SP-D)、血管生成素2(angiopoietin 2,ANG2)及高迁移率族蛋白B1(high mobility group protein B1,HMGB1)在社区获得性肺炎(community-acquired pneumonia,CAP)严重程度及预后评估中的价值。方法:连续纳入2022年1月至2023年1月于河南省人民医院呼吸与危重症医学科住院并确诊为CAP的患者,共112例,其中非重症CAP(non-severe community-acquired pneumonia,NSCAP)70例,重症CAP(severe community-acquired pneumonia,SCAP)42例;根据90 d生存情况,分为生存组和死亡组,分别为83例和29例。ELISA法检测血浆RAGE、SP-D、ANG2及HMGB1的浓度,采用二元logistic回归分析评估发展为SCAP及90 d死亡的危险因素,应用受试者工作特征(ROC)曲线分析上述指标单独及联合CURB-65评分预测SCAP、90 d死亡风险的价值。结果:SCAP组RAGE、SP-D、ANG2、HMGB1的浓度中位数(四分位数)分别为2.09(0.90,4.99)ng/ml、3.48(2.22,6.98)ng/ml、3.59(2.50,6.31)ng/ml、47.52(25.99,80.58)ng/ml,均较CAP组[分别为1.21(0.88,2.26)ng/ml、2.45(1.36,3.77)ng/ml、0.90(0.53,1.64)ng/ml、14.09(7.96,25.31)ng/ml]显著升高,差异均有统计学意义(Z=-2.861,P=0.004;Z=-2.951,P=0.003;Z=-7.272,P<0.001;Z=-6.256,P<0.001)。其中,ANG2和HMGB1均是CAP发展为SCAP的独立危险因素(OR=3.889,95%CI:1.775~8.518,P=0.001;OR=1.047,95%CI:1.012~1.082,P=0.008),两者联合预测发展为SCAP取得的AUC值为0.923,敏感度和特异度分别为83.3%和85.7%。死亡组RAGE、SP-D、ANG2、HMGB1浓度中位数(四分位数)分别为2.73(0.82,4.59)ng/ml、3.41(2.49,6.86)ng/ml、4.30(2.98,6.63)ng/ml、64.01(35.32,89.34)ng/ml均明显高于生存组[分别为1.24(0.90,2.37)ng/ml、2.61(1.38,4.32)ng/ml、1.00(0.60,1.98)ng/ml、15.05(9.26,26.44)ng/ml],差异均有统计学意义(Z=-1.989,P=0.047;Z=-2.295,P=0.022;Z=-7.024,P<0.001;Z=-6.446,P<0.001),其中,ANG2、HMGB1、CURB-65评分均是CAP患者90 d死亡的独立危险因素(OR=5.458,95%CI:1.374~21.683,P=0.016;OR=1.089,95%CI:1.030~1.151,P=0.003;OR=2.772,95%CI:1.097~7.003,P=0.031),ANG2、HMGB1联合CURB-65评分可以更准确地预测CAP患者90 d死亡风险,其AUC值为0.970,敏感度和特异度分别为89.7%和92.8%。结论:SCAP组及90 d死亡组RAGE、SP-D、ANG2、HMGB1显著升高,ANG2和HMGB1均是发展为SCAP的独立危险因素,ANG2、HMGB1和CURB-65评分均是CAP患者90 d死亡的独立危险因素,三者联合可提高预测90 d死亡风险的价值。展开更多
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.
基金supported by project CNEPRU,Institute of Veterinary Sciences(IVS),University Ibn-Khaldoun(TIARET),Algeria(grant No.F023 2009/0009)
文摘Objective:To evaluate the antifungal activity of four honeys of different types from Algeria against pathogenic yeast i.e.Candida albicans(C.albicans) and Rhoddtorula sp.Methods:Four Algeria honeys of different botanical origin were analvzed to test anlilungal effect against C.albicans,and Rhodotorula sp.Different concentrations(undiluted,10%,30%,50%and 70%w/v) of honey were studied in vitro for their antifugal aclivity using C.albicans and Rhodotorula sp.as fungal strains.Results:The range of the c liameter of zone of inhibition of various concentrations ol tested honeys was(7-23 mm) for Rhodotorula sp.,while C.albicans showed clearly resistance towards all concentrations used.The MICs of tested honey concentrations against C.albicans and Rhodotorula sp.were(70.09-93.48)%and(4.90-99.70)%v/v,respectively.Conclusions:This study demonstrales that,in vitro,these natural products have clearly an antifungal activity against Rhodotorula sp.and C.albicans.
