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该研究采用38株红曲霉菌株固态发酵制备功能红曲米,采用高效液相色谱法测定红曲米中monacolin K和桔霉素含量,筛选高产开环型莫纳可林K(monacolin K)红曲霉菌株,通过形态观察及分子生物学技术对筛选菌株进行鉴定,并将其应用于红曲酒酿造,分析红曲酒的品质。结果表明,筛选得到1株高产开环型monacolin K、不产桔霉素的菌株ABQ2,经鉴定,其为丛毛红曲霉(Monascus pilosus)。采用该菌株发酵制备功能红曲米中的monacolin K含量达到25.10 mg/g,开环率为90.5%,且桔霉素未检出。采用菌株ABQ2酿造的红曲酒酒精度为12%vol,酸度为1.91 g/100 mL,monacolin K含量为0.48 mg/mL,其理化指标均符合相关行标要求;与小曲酒相比,红曲酒中总酯含量(433.65 mg/L)极显著增加(P<0.01),其中乳酸乙酯和乙酸乙酯含量最高,高级醇类含量(145.52 mg/L)略低,主要为正丙醇、异丁醇、正戊醇、β-苯乙醇等。 相似文献
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该研究以新鲜山药为发酵基质,采用丛毛红曲菌(Monascus pilosus)MS-1固态发酵山药,探究新鲜山药、干山药、山药品种、蔗糖、山药块茎大小、乳酸等因素分别对发酵山药中莫纳可林K(MK)产量的影响。结果表明,新鲜山药更有利产生MK,当发酵基质为新鲜铁棍山药,蔗糖添加量为3%,山药块茎大小为(0.5 cm×0.5 cm×0.5 cm),乳酸添加量为0.3%时,MK产量可达8.10 mg/g。该研究可为山药的精深加工提供新思路,对新型红曲产品的开发也具有一定的借鉴意义。 相似文献
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新型降血胆固醇的物质MonacolinK的质谱研究 总被引:3,自引:0,他引:3
本文报告了新型降血胆固醇的物质 Monacolin K的 EI谱和 FAB谱 ,并根据高分辨质谱 ( HRMS)数据讨论了主要特征碎片离子的裂解途径。 m/z 2 2 4碎片离子可能来自 3氢原子的重排的结果。 相似文献
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建立了pH精制区带逆流色谱分离制备红曲中功能成分酸式莫那可林K的新方法。首先用体积分数95%乙醇提取红曲中的莫纳可林K,然后经过碱化处理使内酯式莫那可林K转化为酸式,最后采用溶剂系统V(石油醚):V(乙酸乙酯):V(甲醇):V(水)=5:5:4:6,上相添加HCl(10mmol/L)作为固定相,下相添加氨水(10mmol/L)为流动相进行pH精制区带逆流色谱分离。分离所得的酸式莫那可林K经HPLC检测纯度,并用UV,ESI-MS和~1H-NMR鉴定其化学结构。从2.0g粗提物一次分离得到纯度为93.4%的酸式莫那可林K147mg。 相似文献
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通过紫外线和LiCl对一株红曲菌MP进行复合诱变,并通过响应面法对其固态发酵条件进行优化分析。结果表明:在前期温度为30℃,后期温度为24℃,初始含水量为60%的条件下,Monacolin K的产量最高可达5.33mg/g。 相似文献
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Giuseppe Mannino Piera Iovino Antonino Lauria Tullio Genova Alberto Asteggiano Monica Notarbartolo Alessandra Porcu Graziella Serio Giorgia Chinig Andrea Occhipinti Andrea Capuzzo Claudio Medana Luca Munaron Carla Gentile 《International journal of molecular sciences》2021,22(5)
Hypercholesterolemia is one of the major causes of cardiovascular disease, the risk of which is further increased if other forms of dyslipidemia occur. Current therapeutic strategies include changes in lifestyle coupled with drug administration. Statins represent the most common therapeutic approach, but they may be insufficient due to the onset of resistance mechanisms and side effects. Consequently, patients with mild hypercholesterolemia prefer the use of food supplements since these are perceived to be safer. Here, we investigate the phytochemical profile and cholesterol-lowering potential of Protium heptaphyllum gum resin extract (PHE). Chemical characterization via HPLC-APCI-HRMS2 and GC-FID/MS identified 13 compounds mainly belonging to ursane, oleanane, and tirucallane groups. Studies on human hepatocytes have revealed how PHE is able to reduce cholesterol production and regulate the expression of proteins involved in its metabolism. (HMGCR, PCSK9, LDLR, FXR, IDOL, and PPAR). Moreover, measuring the inhibitory activity of PHE against HMGR, moderate inhibition was recorded. Finally, molecular docking studies identified acidic tetra- and pentacyclic triterpenoids as the main compounds responsible for this action. In conclusion, our study demonstrates how PHE may be a useful alternative to contrast hypercholesterolemia, highlighting its potential as a sustainable multitarget natural extract for the nutraceutical industry that is rapidly gaining acceptance as a source of health-promoting compounds. 相似文献
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以黄豆、黑豆、豌豆、绿豆和红豆5种常见食用豆类为基质,以高产莫纳可林K(monacolin K)且不产桔霉素的丛毛红曲菌(Monascus pilosus)MS-1为发酵菌株,进行红曲菌固态发酵,并对红曲菌MS-1在不同豆类中的发酵进程、淀粉酶与蛋白酶的酶活、发酵产物色价、莫纳可林K的含量,以及色素组成进行了分析。结果显示,豌豆、绿豆、红豆比黄豆和黑豆更适合红曲菌的生长,发酵过程中淀粉酶与蛋白酶的产生、莫纳可林K和色素的积累,以及色素组分存在一定差异。其中,豌豆的色价和莫纳可林K含量最高,分别达到246.12 U/g(干基)和5.05 mg/g(干基),适合作为高色价和高莫纳可林K红曲的生产基质。 相似文献