共查询到17条相似文献,搜索用时 62 毫秒
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5-氨基乙酰丙酸(ALA)的功能与展开 总被引:3,自引:0,他引:3
5-氨基乙酰丙酸(ALA)是生物化学中至关重要的化合物,它是叶绿素、血红朊、细胞色素等具环状四吡咯基的化合物群共同的生物合成中间体,为生命体中普遍存在的天然氨基酸。该化合物亦可通过化学合成和发酵的方法制取。其在农业上可作为植物生长调节剂应用,同时亦可作为治癌剂、诊断试剂及毛发促进剂等在医药、化妆品等领域应用。 相似文献
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5—氨基乙酰丙酸的植物生理活性 总被引:13,自引:0,他引:13
在农药创制中,为了提高创制效率及药剂对环境的安全性,以生物源物质作为先导物进行新化学结构农药的创制已成为当今世界新农药创制的热点。这些生物源物质包括动物源(如沙蚕毒)、植物源(如烟碱、鱼藤)、微生物源(如吡咯菌素)及害物靶标酶必须物(如原卟啉原)。除此之外,生物本身还含有许多必不可少的生理活性物质,这种物质对生物的生长具有相当的影响。如能以此类物质作为农药先导物进行新农药创制,有望开发出与环境相容性及选择性均高的新农药。本文介绍的5-氨基乙酰丙酸系属此类物质,特予整理,以供参考。 相似文献
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Mohammad Jalili-Nik Farzaneh Abbasinezhad-moud Sajad Sahab-Negah Abolfazl Maghrouni Mohammad Etezad Razavi Maryam Khaleghi Ghadiri Walter Stummer Ali Gorji 《International journal of molecular sciences》2021,22(11)
5-Aminolevulinic acid (5-ALA) is a naturally occurring non-proteinogenic amino acid, which contributes to the diagnosis and therapeutic approaches of various cancers, including glioblastoma (GBM). In the present study, we aimed to investigate whether 5-ALA exerted cytotoxic effects on GBM cells. We assessed cell viability, apoptosis rate, mRNA expressions of various apoptosis-related genes, generation of reactive oxygen species (ROS), and migration ability of the human U-87 malignant GBM cell line (U87MG) treated with 5-ALA at different doses. The half-maximal inhibitory concentration of 5-ALA on U87MG cells was 500 μg/mL after 7 days; 5-ALA was not toxic for human optic cells and NIH-3T3 cells at this concentration. The application of 5-ALA led to a significant increase in apoptotic cells, enhancement of Bax and p53 expressions, reduction in Bcl-2 expression, and an increase in ROS generation. Furthermore, the application of 5-ALA increased the accumulation of U87MG cells in the SUB-G1 population, decreased the expression of cyclin D1, and reduced the migration ability of U87MG cells. Our data indicate the potential cytotoxic effects of 5-ALA on U87MG cells. Further studies are required to determine the spectrum of the antitumor activity of 5-ALA on GBM. 相似文献
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甘氨酸和琥珀酸是红假单胞菌生物转化合成5-氨基乙酰丙酸(ALA)的前体。在异养培养的条件下考察了两者浓度,添加时间以及协同作用对红假单胞菌生长及累积ALA的影响。结果表明添加100mmol/L甘氨酸,使ALA比生成速率(qALA)明显提高,ALA产量达到22.2mg/L,是不添加甘氨酸的3倍;同时加入100mmol/L的甘氨酸和20mmol/L的琥珀酸,ALA产量达到29.4mg/L,是两者都不加时的4.1倍。 相似文献
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Aleksandra Kaczorowska Magorzata Malinga-Drozd Wojciech Kaas Marta Kopaczyska Stanisaw Woowiec Katarzyna Borowska 《International journal of molecular sciences》2021,22(4)
Polyamidoamine PAMAM dendrimer generation 3 (G3) was modified by attachment of biotin via amide bond and glucoheptoamidated by addition of α-D-glucoheptono-1,4-lacton to obtain a series of conjugates with a variable number of biotin residues. The composition of conjugates was determined by detailed 1-D and 2-D NMR spectroscopy to reveal the number of biotin residues, which were 1, 2, 4, 6, or 8, while the number of glucoheptoamide residues substituted most of the remaining primary amine groups of PAMAM G3. The conjugates were then used as host molecules to encapsulate the 5-aminolevulinic acid. The solubility of 5-aminolevulinic acid increased twice in the presence of the 5-mM guest in water. The interaction between host and guest was accompanied by deprotonation of the carboxylic group of 5-aminolevulinic acid and proton transfer into internal ternary nitrogen atoms of the guest as evidenced by a characteristic chemical shift of resonances in the 1H NMR spectrum of associates. The guest molecules were most likely encapsulated inside inner shell voids of the host. The number of guest molecules depended on the number of biotin residues of the host, which was 15 for non-biotin-containing glucoheptoamidated G3 down to 6 for glucoheptoamidated G3 with 8 biotin residues on the host surface. The encapsulates were not cytotoxic against Caco-2 cells up to 200-µM concentration in the dark. All encapsulates were able to deliver 5-aminolevulinic acid to cells but aqueous encapsulates were more active in this regard. Simultaneously, the reactive oxygen species were detected by staining with H2DCFDA in Caco-2 cells incubated with encapsulates. The amount of PpIX was sufficient for induction of reactive oxygen species upon 30-s illumination with a 655-nm laser beam. 相似文献
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5-氨基乙酰丙酸(ALA)在农业、医学等领域应用广泛,市场前景广阔。今采用膜分离、反应萃取和浓缩结晶相结合的新工艺从发酵液中提取5-氨基乙酰丙酸盐酸盐(ALA·HCl),有效提高了产品的回收率,降低了生产成本。分离过程中先对离心后的发酵液进行超滤除杂,反渗透浓缩,预处理过程ALA回收率为86.4%;然后以体积比1:1的磷酸二(2-乙基己基)酯-正己醇混合液为萃取剂,20℃下进行二级萃取。初始水相pH6.5,两次萃取有机相和水相的体积比R均为0.5;两级萃取所得的有机相混合后,再在30℃下用1mol·L-1盐酸对有机相进行反萃取,水相和有机相的体积比r为0.5。萃取过程ALA的回收率为79.8%。所得反萃水相经脱色、真空蒸发浓缩后二次冷却结晶。分离过程ALA·HCl的总收率达到55.2%,产品纯度大于99.5%。 相似文献