Enhanced production and purification of L-asparaginase from Bacillus paralicheniformis AUMC B-516 with potent cytotoxicity against MCF-7 cell lines.

IF 3.5 3区 生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Abdullah Abobakr Saleh, Hamdy M El-Aref, Azza M Ezzeldin, Rania M Ewida, Osama A M Al-Bedak
{"title":"Enhanced production and purification of L-asparaginase from Bacillus paralicheniformis AUMC B-516 with potent cytotoxicity against MCF-7 cell lines.","authors":"Abdullah Abobakr Saleh, Hamdy M El-Aref, Azza M Ezzeldin, Rania M Ewida, Osama A M Al-Bedak","doi":"10.1186/s13568-025-01890-w","DOIUrl":null,"url":null,"abstract":"<p><p>L-asparaginase is an important enzyme used in the pharmaceutical and food industries. Nowadays, bacterial species represent the main source of microbial synthesis for L-asparaginase. But studies aimed at improving production yields and new methods that use various microbes to expand the scope of application for the generated enzyme are also necessary for industrial manufacturing. This study focused on the isolation of Bacillus paralicheniformis AUMC B-516 and the optimization of L-asparaginase production under submerged fermentation. The enzyme was purified and characterized, followed by an evaluation of its cytotoxic effects against the MCF-7 human breast cancer cell line. The results revealed potent anticancer activity, highlighting the potential application of the purified enzyme in cancer therapeutics. Bacillus paralicheniformis AUMC B-516 was utilized for the biosynthesis of L-asparaginase (116.4 U/mL) after 48 h in the presence of 0.2% glucose and 1.0% L-asparagine at 35 °C and pH 8.0. Two-step chromatography (DEAE-cellulose and Sephacryl S200 HR) achieved a 12-fold purification, resulting in an enzyme specific activity of 4087.6 U/mg. For pure L-asparaginase that contained L-asparagine, the Km and Vmax values were 6.22 × 10<sup>-2</sup> mM and 120.75 µmol/min, respectively. Quantitative assessment of DNA fragmentation in MCF‑7 cells treated with B. paralicheniformis B-516' pure L-asparaginase was performed (22.2 ± 1.36%) and the drug doxorubicin (23.9 ± 0.93%) were significantly greater than those in the negative control cells (8.9 ± 0.83%). MCF-7 cells treated with 1000, 500, 250, 125, 62.5, or 31.25 µg/mL B. paralicheniformis AUMC B-516' pure L-asparaginase showed considerable cytotoxicity, with an IC<sub>50</sub> of 49.3 µg/mL. Biochemical analyses revealed significant increases in aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activities, while blood glucose, other electrolyte levels, and indicators of renal function remained unchanged. These findings highlight B. paralicheniformis AUMC B-516 as a promising source of L-asparaginase for future biotechnological and pharmaceutical applications.</p>","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"15 1","pages":"80"},"PeriodicalIF":3.5000,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12098240/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"AMB Express","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1186/s13568-025-01890-w","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

L-asparaginase is an important enzyme used in the pharmaceutical and food industries. Nowadays, bacterial species represent the main source of microbial synthesis for L-asparaginase. But studies aimed at improving production yields and new methods that use various microbes to expand the scope of application for the generated enzyme are also necessary for industrial manufacturing. This study focused on the isolation of Bacillus paralicheniformis AUMC B-516 and the optimization of L-asparaginase production under submerged fermentation. The enzyme was purified and characterized, followed by an evaluation of its cytotoxic effects against the MCF-7 human breast cancer cell line. The results revealed potent anticancer activity, highlighting the potential application of the purified enzyme in cancer therapeutics. Bacillus paralicheniformis AUMC B-516 was utilized for the biosynthesis of L-asparaginase (116.4 U/mL) after 48 h in the presence of 0.2% glucose and 1.0% L-asparagine at 35 °C and pH 8.0. Two-step chromatography (DEAE-cellulose and Sephacryl S200 HR) achieved a 12-fold purification, resulting in an enzyme specific activity of 4087.6 U/mg. For pure L-asparaginase that contained L-asparagine, the Km and Vmax values were 6.22 × 10-2 mM and 120.75 µmol/min, respectively. Quantitative assessment of DNA fragmentation in MCF‑7 cells treated with B. paralicheniformis B-516' pure L-asparaginase was performed (22.2 ± 1.36%) and the drug doxorubicin (23.9 ± 0.93%) were significantly greater than those in the negative control cells (8.9 ± 0.83%). MCF-7 cells treated with 1000, 500, 250, 125, 62.5, or 31.25 µg/mL B. paralicheniformis AUMC B-516' pure L-asparaginase showed considerable cytotoxicity, with an IC50 of 49.3 µg/mL. Biochemical analyses revealed significant increases in aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activities, while blood glucose, other electrolyte levels, and indicators of renal function remained unchanged. These findings highlight B. paralicheniformis AUMC B-516 as a promising source of L-asparaginase for future biotechnological and pharmaceutical applications.

副青衣芽孢杆菌AUMC B-516对MCF-7细胞系具有强细胞毒性的l -天冬酰胺酶的强化生产和纯化。
l -天冬酰胺酶是一种用于制药和食品工业的重要酶。目前,细菌是l -天冬酰胺酶微生物合成的主要来源。但是,旨在提高产量和利用各种微生物扩大所生成酶的应用范围的新方法的研究对于工业制造也是必要的。本研究对副青衣芽孢杆菌AUMC B-516进行了分离培养,并对l -天冬酰胺酶的生产工艺进行了优化。对该酶进行了纯化和表征,随后对其对MCF-7人乳腺癌细胞系的细胞毒作用进行了评估。结果显示,该纯化酶具有强大的抗癌活性,在癌症治疗方面具有潜在的应用前景。利用副青芽孢杆菌AUMC B-516在0.2%葡萄糖和1.0% l -天冬酰胺存在下,在35℃、pH 8.0条件下,经48 h生物合成l -天冬酰胺酶(116.4 U/mL)。两步色谱法(DEAE-cellulose和Sephacryl S200 HR)纯化12倍,酶比活性为4087.6 U/mg。对于含有l -天冬酰胺的纯l -天冬酰胺酶,Km和Vmax分别为6.22 × 10-2 mM和120.75µmol/min。经副青衣芽孢杆菌B-516纯l -天冬酰胺酶处理的MCF - 7细胞DNA片段率(22.2±1.36%)和阿霉素(23.9±0.93%)均显著高于阴性对照细胞(8.9±0.83%)。用1000、500、250、125、62.5或31.25µg/mL B. paricheniformis AUMC B-516’纯l -天冬酰胺酶处理MCF-7细胞表现出相当大的细胞毒性,IC50为49.3µg/mL。生化分析显示,天冬氨酸转氨酶(AST)和丙氨酸转氨酶(ALT)活性显著升高,而血糖、其他电解质水平和肾功能指标保持不变。这些发现强调了副青霉状芽孢杆菌AUMC B-516作为l -天冬酰胺酶的一个有前景的来源,在未来的生物技术和制药应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
AMB Express
AMB Express BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
CiteScore
7.20
自引率
2.70%
发文量
141
审稿时长
13 weeks
期刊介绍: AMB Express is a high quality journal that brings together research in the area of Applied and Industrial Microbiology with a particular interest in ''White Biotechnology'' and ''Red Biotechnology''. The emphasis is on processes employing microorganisms, eukaryotic cell cultures or enzymes for the biosynthesis, transformation and degradation of compounds. This includes fine and bulk chemicals, polymeric compounds and enzymes or other proteins. Downstream processes are also considered. Integrated processes combining biochemical and chemical processes are also published.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信