Microbial Cell Factories最新文献

筛选
英文 中文
Correction: Glycylglycine promotes the solubility and antigenic utility of recombinant HCV structural proteins in a point-of-care immunoassay for detection of active viremia. 更正:甘氨酸促进重组丙型肝炎病毒结构蛋白的溶解度和抗原效用,用于即时免疫分析检测活动性病毒血症。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-23 DOI: 10.1186/s12934-024-02622-8
Heba Shawky, Ashraf A Tabll, Reem M Elshenawy, Naiera M Helmy, Rehab I Moustafa, Yasser K Elesnawy, Marwa M Abdelghany, Yasmine S El-Abd
{"title":"Correction: Glycylglycine promotes the solubility and antigenic utility of recombinant HCV structural proteins in a point-of-care immunoassay for detection of active viremia.","authors":"Heba Shawky, Ashraf A Tabll, Reem M Elshenawy, Naiera M Helmy, Rehab I Moustafa, Yasser K Elesnawy, Marwa M Abdelghany, Yasmine S El-Abd","doi":"10.1186/s12934-024-02622-8","DOIUrl":"10.1186/s12934-024-02622-8","url":null,"abstract":"","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"340"},"PeriodicalIF":4.3,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11665090/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142877494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of the large-scale production for Erwinia amylovora bacteriophages. 淀粉状埃尔文菌噬菌体规模化生产工艺优化。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-23 DOI: 10.1186/s12934-024-02607-7
Su Jin Jo, Sib Sankar Giri, Sung Bin Lee, Won Joon Jung, Jae Hong Park, Mae Hyun Hwang, Da Sol Park, Eunjae Park, Sang Wha Kim, Jin Woo Jun, Sang Guen Kim, Eunjung Roh, Se Chang Park
{"title":"Optimization of the large-scale production for Erwinia amylovora bacteriophages.","authors":"Su Jin Jo, Sib Sankar Giri, Sung Bin Lee, Won Joon Jung, Jae Hong Park, Mae Hyun Hwang, Da Sol Park, Eunjae Park, Sang Wha Kim, Jin Woo Jun, Sang Guen Kim, Eunjung Roh, Se Chang Park","doi":"10.1186/s12934-024-02607-7","DOIUrl":"10.1186/s12934-024-02607-7","url":null,"abstract":"<p><strong>Background: </strong>Fire blight, caused by Erwinia amylovora, poses a significant threat to global agriculture, with antibiotic-resistant strains necessitating alternative solutions such as phage therapy. Scaling phage therapy to an industrial level requires efficient mass-production methods, particularly in optimizing the seed culture process. In this study, we investigated large-scale E. amylovora phage production by optimizing media supplementation and fermenter conditions, focusing on minimizing seed phages and pathogenic strains to reduce risks and improve the seed culture process.</p><p><strong>Results: </strong>We optimized the phage inoculum concentrations and media supplements to achieve higher phage yields comparable to or exceeding conventional methods. Laboratory-scale validation and refinement for fermenter-scale production allowed us to reduce bacterial and phage inoculum levels to 10⁵ CFU/mL and 10³ PFU/mL, respectively. Using fructose and sucrose supplements, the yields were comparable to conventional methods that use 10⁸ CFU/mL host bacteria and 10⁷ PFU/mL phages. Further pH adjustments in the fermenter increased yields by 16-303% across all phages tested.</p><p><strong>Conclusions: </strong>We demonstrated the successful optimization and scale-up of E. amylovora phage production, emphasizing the potential for industrial bioprocessing with the reduced use of host cells and phage seeds. Overall, by refining key production parameters, we established a robust and scalable method for enhancing phage production efficiency.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"342"},"PeriodicalIF":4.3,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11664846/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142877500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
H2-driven xylitol production in Cupriavidus necator H16. 坏死葡萄球菌 H16 中 H2 驱动的木糖醇生产
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-23 DOI: 10.1186/s12934-024-02615-7
Tytti Jämsä, Nico J Claassens, Laura Salusjärvi, Antti Nyyssölä
{"title":"H<sub>2</sub>-driven xylitol production in Cupriavidus necator H16.","authors":"Tytti Jämsä, Nico J Claassens, Laura Salusjärvi, Antti Nyyssölä","doi":"10.1186/s12934-024-02615-7","DOIUrl":"10.1186/s12934-024-02615-7","url":null,"abstract":"<p><strong>Background: </strong>Biocatalysis offers a potentially greener alternative to chemical processes. For biocatalytic systems requiring cofactor recycling, hydrogen emerges as an attractive reducing agent. Hydrogen is attractive because all the electrons can be fully transferred to the product, and it can be efficiently produced from water using renewable electricity. In this article, resting cells of Cupriavidus necator H16 harboring a NAD-dependent hydrogenase were employed for cofactor recycling to reduce D-xylose to xylitol, a commonly used sweetener. To enable this bioconversion, D-xylose reductase from Scheffersomyces stipitis was heterologously expressed in C. necator.</p><p><strong>Results: </strong>D-xylose reductase was successfully expressed in C. necator, enabling almost complete bioconversion of 30 g/L of D-xylose into xylitol. It was found that over 90% of the energy and protons derived from hydrogen were spent for the bioconversion, demonstrating the efficiency of the system. The highest xylitol productivity reached was 0.7 g/L/h. Additionally, the same chassis efficiently produced L-arabitol and D-ribitol from L-arabinose and D-ribose, respectively.</p><p><strong>Conclusions: </strong>This study highlights the efficient utilization of renewable hydrogen as a reducing agent to power cofactor recycling. Hydrogen-oxidizing bacteria, such as C. necator, can be promising hosts for performing hydrogen-driven biocatalysis.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"345"},"PeriodicalIF":4.3,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11665087/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unlocking the potential of titanium dioxide nanoparticles: an insight into green synthesis, optimizations, characterizations, and multifunctional applications. 解锁二氧化钛纳米颗粒的潜力:洞察绿色合成,优化,表征和多功能应用。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-23 DOI: 10.1186/s12934-024-02609-5
Ahmed Ghareeb, Amr Fouda, Rania M Kishk, Waleed M El Kazzaz
{"title":"Unlocking the potential of titanium dioxide nanoparticles: an insight into green synthesis, optimizations, characterizations, and multifunctional applications.","authors":"Ahmed Ghareeb, Amr Fouda, Rania M Kishk, Waleed M El Kazzaz","doi":"10.1186/s12934-024-02609-5","DOIUrl":"10.1186/s12934-024-02609-5","url":null,"abstract":"<p><p>This comprehensive review explores the emergence of titanium dioxide nanoparticles (TiO<sub>2</sub>-NPs) as versatile nanomaterials, particularly exploring their biogenic synthesis methods through different biological entities such as plants, bacteria, fungi, viruses, and algae. These biological entities provide eco-friendly, cost-effective, biocompatible, and rapid methods for TiO<sub>2</sub>-NP synthesis to overcome the disadvantages of traditional approaches. TiO<sub>2</sub>-NPs have distinctive properties, including high surface area, stability, UV protection, and photocatalytic activity, which enable diverse applications. Through detailed analysis, this review demonstrates significant applications of green fabricated TiO<sub>2</sub>-NPs in biomedicine, explicitly highlighting their antimicrobial, anticancer, and antioxidant activities, along with applications in targeted drug delivery, photodynamic therapy, and theragnostic cancer treatment. Additionally, the review underscores their pivotal significance in biosensors, bioimaging, and agricultural applications such as nanopesticides and nanofertilizers. Also, this review proves valuable incorporation of TiO<sub>2</sub>-NPs in the treatment of contaminated soil and water with various environmental contaminants such as dyes, heavy metals, radionuclides, agricultural effluents, and pathogens. These comprehensive findings establish the foundation for future innovations in nanotechnology, underscoring the importance of further investigating bio-based synthetic approaches and bioactivity mechanisms to enhance their efficacy and safety across healthcare, agricultural, and environmental applications.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"341"},"PeriodicalIF":4.3,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11665025/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142877503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microbial enzymes as powerful natural anti-biofilm candidates. 微生物酶是强大的天然抗生物膜候选物。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-23 DOI: 10.1186/s12934-024-02610-y
Lamiaa A Al-Madboly, Asmaa Aboulmagd, Mohamed Abd El-Salam, Ivan Kushkevych, Rasha M El-Morsi
{"title":"Microbial enzymes as powerful natural anti-biofilm candidates.","authors":"Lamiaa A Al-Madboly, Asmaa Aboulmagd, Mohamed Abd El-Salam, Ivan Kushkevych, Rasha M El-Morsi","doi":"10.1186/s12934-024-02610-y","DOIUrl":"10.1186/s12934-024-02610-y","url":null,"abstract":"<p><p>Bacterial biofilms pose significant challenges, from healthcare-associated infections to biofouling in industrial systems, resulting in significant health impacts and financial losses globally. Classic antimicrobial methods often fail to eradicate sessile microbial communities within biofilms, requiring innovative approaches. This review explores the structure, formation, and role of biofilms, highlighting the critical importance of exopolysaccharides in biofilm stability and resistance mechanisms. We emphasize the potential of microbial enzymatic approaches, particularly focusing on glycosidases, proteases, and deoxyribonucleases, which can disrupt biofilm matrices effectively. We also delve into the importance of enzymes such as cellobiose dehydrogenase, which disrupts biofilms by degrading polysaccharides. This enzyme is mainly sourced from Aspergillus niger and Sclerotium rolfsii, with optimized production strategies enhancing its efficacy. Additionally, we explore levan hydrolase, alginate lyase, α-amylase, protease, and lysostaphin as potent antibiofilm agents, discussing their microbial origins and production optimization strategies. These enzymes offer promising avenues for combating biofilm-related challenges in healthcare, environmental, and industrial settings. Ultimately, enzymatic strategies present environmentally friendly solutions with high potential for biofilm management and infection control.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"343"},"PeriodicalIF":4.3,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11664836/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142877497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel engineered strain of Methylorubrum extorquens for methylotrophic production of glycolic acid. 一种用于甲基营养化生产乙醇酸的新工程菌株。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-23 DOI: 10.1186/s12934-024-02583-y
Katharina Dietz, Carina Sagstetter, Melanie Speck, Arne Roth, Steffen Klamt, Jonathan Thomas Fabarius
{"title":"A novel engineered strain of Methylorubrum extorquens for methylotrophic production of glycolic acid.","authors":"Katharina Dietz, Carina Sagstetter, Melanie Speck, Arne Roth, Steffen Klamt, Jonathan Thomas Fabarius","doi":"10.1186/s12934-024-02583-y","DOIUrl":"10.1186/s12934-024-02583-y","url":null,"abstract":"<p><p>The conversion of CO<sub>2</sub> into methanol depicts one of the most promising emerging renewable routes for the chemical and biotech industry. Under this regard, native methylotrophs have a large potential for converting methanol into value-added products but require targeted engineering approaches to enhance their performances and to widen their product spectrum. Here we use a systems-based approach to analyze and engineer M. extorquens TK 0001 for production of glycolic acid. Application of constraint-based metabolic modeling reveals the great potential of M. extorquens for that purpose, which is not yet described in literature. In particular, a superior theoretical product yield of 1.0 C-mol<sub>Glycolic acid</sub> C-mol<sub>Methanol</sub><sup>-1</sup> is predicted by our model, surpassing theoretical yields of sugar fermentation. Following this approach, we show here that strain engineering is viable and present 1st generation strains producing glycolic acid via a heterologous NADPH-dependent glyoxylate reductase. It was found that lactic acid is a surprising by-product of glycolic acid formation in M. extorquens, most likely due to a surplus of available NADH upon glycolic acid synthesis. Finally, the best performing strain was tested in a fed-batch fermentation producing a mixture of up to total 1.2 g L<sup>-1</sup> glycolic acid and lactic acid. Several key performance indicators of our glycolic acid producer strain are superior to state-of-the-art synthetic methylotrophs. The presented results open the door for further strain engineering of the native methylotroph M. extorquens and pave the way to produce two promising biopolymer building blocks from green methanol, i.e., glycolic acid and lactic acid.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"344"},"PeriodicalIF":4.3,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11665112/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The exploration of high production of tiancimycins in Streptomyces sp. CB03234-S revealed potential influences of universal stress proteins on secondary metabolisms of streptomycetes. 在Streptomyces sp. CB03234-S中高产天霉素的探索揭示了通用应激蛋白对链霉菌次生代谢的潜在影响。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-19 DOI: 10.1186/s12934-024-02613-9
Huiming Liu, Zhiying Fan, Nian Tong, Jing Lin, Yong Huang, Yanwen Duan, Xiangcheng Zhu
{"title":"The exploration of high production of tiancimycins in Streptomyces sp. CB03234-S revealed potential influences of universal stress proteins on secondary metabolisms of streptomycetes.","authors":"Huiming Liu, Zhiying Fan, Nian Tong, Jing Lin, Yong Huang, Yanwen Duan, Xiangcheng Zhu","doi":"10.1186/s12934-024-02613-9","DOIUrl":"10.1186/s12934-024-02613-9","url":null,"abstract":"<p><strong>Background: </strong>Universal stress proteins (USPs) are prevalent in various bacteria to cope with different adverse stresses, while their possible effects on secondary metabolisms of hosts are unclear. Tiancimycins (TNMs) are ten-membered endiynes possessing excellent potential for development of anticancer antibody-drug conjugates. During our efforts to improve TNMs titer, a high-producing strain Streptomyces sp. CB03234-S had been obtained and its possible high yield mechanism is being continuously explored to further enhance TNMs production.</p><p><strong>Results: </strong>In this work, the whole-genome resequencing and analysis results revealed a notable 583 kb terminal deletion containing 8 highly expressed usp genes in the genome of CB03234-S. The individual complementation of lost USPs in CB03234-S all showed differential effects on secondary metabolism, especially TNMs production. Among them, the overexpression of USP3 increased TNMs titer from 12.8 ± 0.2 to 31.1 ± 2.3 mg/L, while the overexpression of USP8 significantly reduced TNMs titer to only 1.0 ± 0.1 mg/L, but activated the production of porphyrin-type compounds. Subsequent genetic manipulations on USP3/USP8 orthologs in Streptomyces. coelicolor A3(2) and Streptomyces sp. CB00271 also presented clear effects on the secondary metabolisms of hosts. Further sequence similarity network analysis and Streptomyces-based pan‑genomic analysis suggested that the USP3/USP8 orthologs are widely distributed across Streptomyces.</p><p><strong>Conclusion: </strong>Our studies shed light on the potential effects of USPs on secondary metabolisms of streptomycetes for the first time, and USPs could become novel targets for exploring and exploiting natural products in streptomycetes.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"337"},"PeriodicalIF":4.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11657280/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modified vaginal lactobacilli expressing fluorescent and luminescent proteins for more effective monitoring of their release from nanofibers, safety and cell adhesion. 表达荧光蛋白和发光蛋白的阴道乳酸杆菌更有效地监测其从纳米纤维的释放、安全性和细胞粘附性。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-19 DOI: 10.1186/s12934-024-02612-w
Spase Stojanov, Tina Vida Plavec, Špela Zupančič, Aleš Berlec
{"title":"Modified vaginal lactobacilli expressing fluorescent and luminescent proteins for more effective monitoring of their release from nanofibers, safety and cell adhesion.","authors":"Spase Stojanov, Tina Vida Plavec, Špela Zupančič, Aleš Berlec","doi":"10.1186/s12934-024-02612-w","DOIUrl":"10.1186/s12934-024-02612-w","url":null,"abstract":"<p><p>Electrospun nanofibers offer a highly promising platform for the delivery of vaginal lactobacilli, providing an innovative approach to preventing and treating vaginal infections. To advance the application of nanofibers for the delivery of lactobacilli, tools for studying their safety and efficacy in vitro need to be established. In this study, fluorescent (mCherry and GFP) and luminescent (NanoLuc luciferase) proteins were expressed in three vaginal lactobacilli (Lactobacillus crispatus, Lactobacillus gasseri and Lactobacillus jensenii) and a control Lactiplantibacillus plantarum with the aim to use this technology for close tracking of lactobacilli release from nanofibers and their adhesion on epithelial cells. The recombinant proteins influenced the growth of the bacteria, but not their ability to produce hydrogen peroxide. Survival of lactobacilli in nanofibers immediately after electrospinning varied among species. Bacteria retained fluorescence upon incorporation into PEO nanofibers, which was vital for evaluation of their rapid release. In addition, fluorescent labelling facilitated efficient tracking of bacterial adhesion to Caco-2 epithelial cells, while luminescence provided important quantitative insights into bacterial attachment, which varied from 0.5 to 50% depending on the species. The four lactobacilli in dispersion or in nanofibers were not detrimental for the viability of Caco-2 cells, and did not demonstrate hemolytic activity highlighting the safety profiles of both bacteria and PEO nanofibers. To summarize, this study contributes to the development of a promising delivery system, tailored for local administration of safe vaginal lactobacilli.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"333"},"PeriodicalIF":4.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11657421/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lipid production from biofilms of Marinobacter atlanticus in a fixed bed bioreactor. 大西洋海洋杆菌生物膜在固定床生物反应器中的产脂。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-19 DOI: 10.1186/s12934-024-02617-5
Matthew D Yates, Rebecca L Mickol, Joseph S Tolsma, Maryssa Beasley, Jamia Shepard, Sarah M Glaven
{"title":"Lipid production from biofilms of Marinobacter atlanticus in a fixed bed bioreactor.","authors":"Matthew D Yates, Rebecca L Mickol, Joseph S Tolsma, Maryssa Beasley, Jamia Shepard, Sarah M Glaven","doi":"10.1186/s12934-024-02617-5","DOIUrl":"10.1186/s12934-024-02617-5","url":null,"abstract":"<p><strong>Background: </strong>Biotechnologies that utilize microorganisms as production hosts for lipid synthesis will enable an efficient and sustainable solution to produce lipids, decreasing reliance on traditional routes for production (either petrochemical or plant-derived) and supporting a circular bioeconomy. To realize this goal, continuous biomanufacturing processes must be developed to maximize productivity and minimize costs compared to traditional batch fermentation processes.</p><p><strong>Results: </strong>Here, we utilized biofilms of the marine bacterium, Marinobacter atlanticus, to produce wax esters from succinate (i.e., a non-sugar feedstock) to determine its potential to serve as a production chassis in a continuous flow, biofilm-based biomanufacturing process. To accomplish this, we evaluated growth as a function of protein concentration and wax ester production from M. atlanticus biofilms in a continuously operated 3-D printed fixed bed bioreactor. We determined that exposing M. atlanticus biofilms to alternating nitrogen-rich (1.8 mM NH<sub>4</sub><sup>+</sup>) and nitrogen-poor (0 mM NH<sub>4</sub><sup>+</sup>) conditions in the bioreactor resulted in wax ester production (26 ± 5 mg/L, normalized to reactor volume) at a similar concentration to what is observed from planktonic M. atlanticus cells grown in shake flasks previously in our lab (ca. 25 mg/L cell culture). The wax ester profile was predominated by multiple compounds with 32 carbon chain length (C<sub>32</sub>; 50-60% of the total). Biomass production in the reactor was positively correlated with dilution rate, as indicated by protein concentration (maximum of 1380 ± 110 mg/L at 0.4 min<sup>-1</sup> dilution rate) and oxygen uptake rate (maximum of 4 mmol O<sub>2</sub>/L/h at 0.4 min<sup>-1</sup> dilution rate) measurements at different flow rates. Further, we determined the baseline succinate consumption rate for M. atlanticus biofilms to be 0.16 ± 0.03 mmol/L/h, which indicated that oxygen is the limiting reactant in the process.</p><p><strong>Conclusion: </strong>The results presented here are the first step toward demonstrating that M. atlanticus biofilms can be used as the basis for development of a continuous flow wax ester biomanufacturing process from non-sugar feedstocks, which will further enable sustainable lipid production in a future circular bioeconomy.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"336"},"PeriodicalIF":4.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11657173/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In vitro and in vivo studies of selenium nanoparticles coated bacterial polysaccharide as anti-lung cancer agents. 硒纳米粒子包覆细菌多糖作为抗肺癌药物的体外和体内研究。
IF 4.3 2区 生物学
Microbial Cell Factories Pub Date : 2024-12-19 DOI: 10.1186/s12934-024-02601-z
Nourhan S Shehata, Bassma H Elwakil, Salma S Elshewemi, Doaa A Ghareeb, Zakia A Olama
{"title":"In vitro and in vivo studies of selenium nanoparticles coated bacterial polysaccharide as anti-lung cancer agents.","authors":"Nourhan S Shehata, Bassma H Elwakil, Salma S Elshewemi, Doaa A Ghareeb, Zakia A Olama","doi":"10.1186/s12934-024-02601-z","DOIUrl":"10.1186/s12934-024-02601-z","url":null,"abstract":"<p><p>Microbial exopolysaccharides (EPSs) possess valuable biological functions and fascinating physicochemical properties. On the other hand, lung cancer is the primary contributor to global cancer-related deaths. However, health and safety concerns have prevented the identification and approval of any medications, including chemotherapeutic agents, for lung cancer treatment to date. The current study aims to enhance the production of bacterial EPS as a coating agent for the synthesis of selenium nanoparticles (AZEPS-SeNPs), to enhance their biological activity against pathogenic microbes, human lung adenocarcinoma cells (A549) in vitro, and diethyl nitrosamine (DEN)-induced lung cancer in vivo. The synthesized AZEPS-SeNPs exhibited a significant antifungal effect reaching 49.3 mm against Candida albicans. SeNPs and EPSs demonstrated a concentration-dependent synergistic antioxidant effect of 96.8%. Moreover, the synthesized nanoparticles showed a highly potent cytotoxic effect against A549 cells (1.724 ± 0.08 µg/mL) with a therapeutic index of 7.18 ± 0.21 that leads to increased reactive oxygen species (ROS) production. AZEPS-SeNPs demonstrated a proapoptotic effect on the lung adenocarcinoma A549 cell line by stimulating caspase 3 and Bax (7.08-fold and 6.505-fold, respectively), inhibiting the anti-apoptotic gene Bcl2, and arresting the cell cycle in the S phase. In vivo study revealed that the AZEPS-SeNPs-treated group showed improved histopathological examination of lung tissue sections. The present study concluded the efficiency of the synthesized bacterial EPS-SeNPs as multi-functional antimicrobial, anticancer and antioxidant agent.</p>","PeriodicalId":18582,"journal":{"name":"Microbial Cell Factories","volume":"23 1","pages":"339"},"PeriodicalIF":4.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11658177/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
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×
相关产品
×
本文献相关产品
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