Biotechnology Journal最新文献

Characterizing the Effect of Volume on Hydrodynamics of Plant Cell Suspensions Using CFD Modeling 利用CFD模型表征体积对植物细胞悬浮液流体动力学的影响

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-28 DOI: 10.1002/biot.70086

Vidya Muthulakshmi Manickavasagam, Kameswararao Anupindi, Nirav Bhatt, Smita Srivastava

{"title":"Characterizing the Effect of Volume on Hydrodynamics of Plant Cell Suspensions Using CFD Modeling","authors":"Vidya Muthulakshmi Manickavasagam, Kameswararao Anupindi, Nirav Bhatt, Smita Srivastava","doi":"10.1002/biot.70086","DOIUrl":"https://doi.org/10.1002/biot.70086","url":null,"abstract":"<div>\u0000 \u0000 Biomass productivities in shake flasks are often not reproduced in bioreactors for plant cell cultures due to change in hydrodynamics. Considering shake flask biomass productivity as benchmark, this study employs shake flask geometries as a model system to understand hydrodynamic changes with volume and identify suitable scale-up criteria for plant cell cultivations, with minimal cost and time, given their slow growth time, using computational fluid dynamics (CFD) and experiments. Cultivation of Viola odorata cells in increasing flask volumes (100–3000 mL) revealed no significant change in biomass productivity. CFD analysis indicated that volumetric oxygen mass transfer coefficient (kLa), increased up to 1000 mL and then decreased, due to saturation of energy dissipation rates (kL is a function of energy dissipation rates) and decreasing interfacial area. The unaffected biomass concentration, despite decreased kLa, suggests that kLa may not be a significant scale-up parameter. Instead, maintaining a constant shear environment, indicated by power per unit volume saturation at higher volumes, was proposed as a suitable scale-up parameter for V. odorata cell cultivation in bioreactors. Moreover, the decrease in velocity difference between fluid layers with increased flask volume, indicated that minimizing velocity gradients in bioreactors could help achieve shake flask biomass productivity.\u0000 </div>","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization and Application of a Thermostable HAD Phosphatase From Thermophilibacter mediterraneus for Glucosamine Production 地中海嗜热杆菌耐热HAD磷酸酶的鉴定及其在葡萄糖生产中的应用

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-28 DOI: 10.1002/biot.70083

Yanmei Qin, Nan Geng, Chun You

{"title":"Characterization and Application of a Thermostable HAD Phosphatase From Thermophilibacter mediterraneus for Glucosamine Production","authors":"Yanmei Qin, Nan Geng, Chun You","doi":"10.1002/biot.70083","DOIUrl":"https://doi.org/10.1002/biot.70083","url":null,"abstract":"<div>\u0000 \u0000 Glucosamine (GlcN), a high-value nutraceutical, is currently produced via environmentally detrimental chitin hydrolysis or inefficient microbial fermentation. While acidic hydrolysis of crustacean chitin raises environmental and allergen concerns, microbial fermentation faces challenges in strain engineering and byproduct formation. One-pot production of GlcN from maltodextrin by an in vitro synthetic enzymatic biosystem (ivSEB) containing glucosamine 6-phosphate phosphatase, which dephosphorylates glucosamine 6-phosphate (GlcN6P) to GlcN, was developed recently. In this study, we identified a thermostable haloacid dehalogenase (HAD) phosphatase, TmHAD, from Thermophilibacter mediterraneus through database mining. Biochemical characterization revealed its remarkable dephosphorylation specificity for GlcN6P, exhibiting 27.6- and 138.0-fold higher activity toward GlcN6P compared to glucose 6-phosphate (G6P) and fructose 6-phosphate (F6P), respectively. The enzyme demonstrated Mg2+-dependent activity and moderate thermal stability with a half-life of 6.6 h at 45°C. When incorporated into an ivSEB (phosphorylation, isomerization, amination, and dephosphorylation), TmHAD enabled GlcN production from maltodextrin with a molar yield of 44.5%. This biosystem represented an effective complement to current GlcN production methods, with the exceptional substrate specificity and thermal stability of TmHAD making it particularly promising for industrial-scale GlcN manufacturing in vitro.\u0000 </div>","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biological Routes for Biohydrogen Production: A Clean and Carbon-Free Fuel 生物氢生产的生物途径：一种清洁和无碳燃料

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-28 DOI: 10.1002/biot.70074

Minseok Cha, Min-Seo Park, Soo-Jung Kim

引用次数: 0

Combinatorial Strategy of Modular Metabolic Engineering and Fermentation Optimization Jointly Improved Gibberellic Acid Production in Fusarium fujikuroi 模块化代谢工程与发酵优化组合策略共同提高藤黑镰刀菌赤霉素产量

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-28 DOI: 10.1002/biot.70088

Chun-Yue Weng, Jia-Yi Han, Zhi-Tao Dong, Zhi-Qiang Liu, Yu-Guo Zheng

{"title":"Combinatorial Strategy of Modular Metabolic Engineering and Fermentation Optimization Jointly Improved Gibberellic Acid Production in Fusarium fujikuroi","authors":"Chun-Yue Weng, Jia-Yi Han, Zhi-Tao Dong, Zhi-Qiang Liu, Yu-Guo Zheng","doi":"10.1002/biot.70088","DOIUrl":"https://doi.org/10.1002/biot.70088","url":null,"abstract":"<div>\u0000 \u0000 Gibberellic acid 3 (GA3), a diterpenoid phytohormone industrially biosynthesized by Fusarium fujikuroi, serves as a pivotal plant growth regulator with extensive agricultural applications. Currently, industrial GA3 production predominantly relies on prolonged submerged microbial fermentation with F. fujikuroi as the main production strain, valued for its native biosynthetic capacity. Nevertheless, large-scale industrialization of GA3 remains constrained by low production yields. In this study, a systematic multimodular metabolic engineering framework was implemented to enhance GA₃ biosynthesis in F. fujikuroi. The engineering strategy encompassed four synergistic modules: reinforcement of fatty acid biosynthesis, augmentation of acetyl-CoA metabolic flux, optimization of redox cofactor homeostasis, and overexpression of the positive transcriptional regulator. This integrated approach yielded the engineered strain OE: Lae1-AGP3 demonstrating a 2.58 g/L GA₃ titer in shake-flask fermentation. Subsequent bioprocess optimization through exogenous fatty acid supplementation further elevated GA3 production to 2.86 g/L, representing a 10.9% increase. This study demonstrates the feasibility of coordinated metabolic modifications for improving GA3 biosynthesis in F. fujikuroi, offering practical insights for overcoming productivity limitations in fungal secondary metabolite fermentation processes.\u0000 </div>","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Review of DNA Restriction-Free Overlapping Sequence Cloning Techniques for Synthetic Biology 合成生物学中DNA无限制重叠序列克隆技术的研究进展

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-26 DOI: 10.1002/biot.70084

Isabella Frighetto Bomfiglio, Isabelli Seiler de Medeiros Mendes, Diego Bonatto

{"title":"A Review of DNA Restriction-Free Overlapping Sequence Cloning Techniques for Synthetic Biology","authors":"Isabella Frighetto Bomfiglio, Isabelli Seiler de Medeiros Mendes, Diego Bonatto","doi":"10.1002/biot.70084","DOIUrl":"https://doi.org/10.1002/biot.70084","url":null,"abstract":"<div>\u0000 \u0000 DNA cloning methods are fundamental tools in molecular biology, synthetic biology, and genetic engineering that enable precise DNA manipulation for various scientific and biotechnological applications. This review systematically summarizes the major restriction-free overlapping sequence cloning (RFOSC) techniques currently used in synthetic biology and examines their development, efficiency, practicality, and specific applications. In vitro methods, including Gibson Assembly, Circular Polymerase Extension Cloning (CPEC), Polymerase Incomplete Primer Extension (PIPE), Overlap Extension Cloning (OEC), Uracil DNA Glycosylase-based Cloning (UDG-Cloning), and commercially available techniques such as In-Fusion, have been discussed alongside hybrid approaches such as Ligation-Independent Cloning (LIC), Sequence-Independent Cloning (SLIC), and T5 Exonuclease-Dependent Assembly (TEDA). Additionally, in vivo methods leveraging host recombination machinery, including Yeast Homologous Recombination (YHR), In Vivo Assembly (IVA), Transformation-Associated Recombination (TAR), and innovative approaches such as Phage Enzyme-Assisted Direct Assembly (PEDA), are critically evaluated. The review highlights that method selection should consider individual research projects’ scale, complexity, and specific needs, noting that no single technique is universally optimal. Future trends suggest the increased integration of enzymatic efficiency, host versatility, and automation, broadening the accessibility and capabilities of DNA assembly technologies.\u0000 </div>","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automatic Assay Preparation Platform (A2P2) for Real-Time Critical Quality Attributes Monitoring of Cell Culture Samples 用于细胞培养样品实时关键质量属性监测的自动检测制备平台（A2P2）

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-25 DOI: 10.1002/biot.70082

Pik K. Chan, Chao-Hsiang (Richard) Wu, Yaokai Duan, Jiu-Li Song, Chetan T. Goudar

{"title":"Automatic Assay Preparation Platform (A2P2) for Real-Time Critical Quality Attributes Monitoring of Cell Culture Samples","authors":"Pik K. Chan, Chao-Hsiang (Richard) Wu, Yaokai Duan, Jiu-Li Song, Chetan T. Goudar","doi":"10.1002/biot.70082","DOIUrl":"https://doi.org/10.1002/biot.70082","url":null,"abstract":"<div>\u0000 \u0000 As the biopharmaceuticals industry becomes increasingly competitive, improving speed-to-market and achieving “Right First Time” are key factors that propel a company to success. Building upon our foundational work on the Automatic Assay Preparation Platform (A2P2) initially introduced to enhance process analytical technology (PAT), this publication describes its innovative application for real-time sample preparation, acquisition, and monitoring of critical quality attributes (CQAs) for biotherapeutic production. Determination of CQA in cell culture is typically supported by analytical laboratories. Titer is determined before product purification by affinity capture column using a liquid handler. Purified product concentration is then measured before subjecting to a subsequent product quality assay. This process takes up to four separate instruments and several analysts to complete. The A2P2 system, embodying an end-to-end automated and autonomous PAT solution, is configured to streamline titer measurement, product purification, purified product concentration measurement, and CQA assay within a single run sequence using a modified ultrahigh performance liquid chromatography (UHPLC) instrument. By utilizing Chromeleon's System Suitability Tests (SST) and Intelligence Run Control (IRC) feature and the Agilent injector program, A2P2 significantly reduces analysts’ hands-on time and shortens result turnaround time for improved efficiency. This evolution of the A2P2 system not only reduces laboratory footprint but also positions it as an ideal solution for real-time bioprocess monitoring of CQA, further advancing our commitment to accelerating the delivery of safe and effective biotherapeutics.\u0000 </div>","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Challenges Associated With the Use of Metal and Metal Oxide Nanoparticles as Antimicrobial Agents: A Review of Resistance Mechanisms and Environmental Implications 与使用金属和金属氧化物纳米颗粒作为抗菌剂相关的挑战：耐药性机制和环境影响的综述

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-25 DOI: 10.1002/biot.70066

Mpho Phehello Ngoepe, Stiaan Schoeman, Saartjie Roux

{"title":"Challenges Associated With the Use of Metal and Metal Oxide Nanoparticles as Antimicrobial Agents: A Review of Resistance Mechanisms and Environmental Implications","authors":"Mpho Phehello Ngoepe, Stiaan Schoeman, Saartjie Roux","doi":"10.1002/biot.70066","DOIUrl":"https://doi.org/10.1002/biot.70066","url":null,"abstract":"The use of metal and metal oxide nanoparticles has been suggested as a means of combating antibiotic-resistant bacteria (ARB). This is due to the ability of nanoparticles to target numerous sites inside the bacterial cell. Microbes can, however, develop a resistance to hazardous environments. Soil microorganisms have evolved resistance to specific metals in soil by employing alternative survival strategies, like those adopted against antibiotics. Because of this survival mechanism, bacteria have been able to develop defense mechanisms to deal with metallic nanoparticles. Resistance has evolved in human pathogens to therapies that use metallic nanoparticles, such as silver nanoparticles. Metallic nanoparticles and antibiotics have currently been proven to be ineffective against several infections. Due to these concerns, scientists are investigating whether nanoparticles might cause environmental harm and potentially breed microbes that are resistant to both inorganic and organic nanoparticles. The increased use of inorganic nanoparticles has thus been shown to result in contaminations in wastewater, facilitating horizontal gene transfer among bacterial populations. The resistance mechanism of metallic nanoparticles, role in antibiotic resistance, and a potential solution to the environment's toxicity from nanoparticles are all discussed in this review.","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/biot.70066","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Metabolic Engineering of Komagataella phaffii and Process Optimization for Biosynthesis of 1,2,4-Butanetriol From Xylose 法菲Komagataella phaffii的代谢工程及木糖合成1,2,4-丁三醇的工艺优化

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-25 DOI: 10.1002/biot.70085

Débora Trichez, Thályta Pacheco, Clara Vida G. C. Carneiro, Jessica C. Bergmann, João Ricardo M. de Almeida

{"title":"Metabolic Engineering of Komagataella phaffii and Process Optimization for Biosynthesis of 1,2,4-Butanetriol From Xylose","authors":"Débora Trichez, Thályta Pacheco, Clara Vida G. C. Carneiro, Jessica C. Bergmann, João Ricardo M. de Almeida","doi":"10.1002/biot.70085","DOIUrl":"https://doi.org/10.1002/biot.70085","url":null,"abstract":"1,2,4-butanetriol (BTO) is a four-carbon polyol used as a precursor for synthesizing pharmaceuticals, polymers, and energetic plasticizers. The present study demonstrates the microbial production of BTO from xylose by engineered Komagataella phaffii yeast strains for the first time. The pathway was established through the overexpression of the enzymes xylose dehydrogenase (XylB), xylonate dehydratase (XylD), and 2-ketoacid decarboxylase (KDC). Two xylonate dehydratase genes, xylD-CC from Caulobacter crescentus and xylD-HL from Halomonas lutea, were evaluated in the constructions, both enabling BTO production. Furthermore, to improve BTO production, a central composite design analysis (CCD) was employed, identifying the best cultivation conditions to improve yeast performance. Under these optimized conditions, the engineered K. phaffii strain produced 1.3 g/L of BTO, achieving a 147% increase compared to the initial setup. Although further genetic engineering efforts are required to enhance BTO production, this study provides insights into potential improvement targets and highlights K. phaffii as a promising platform for the bio-based synthesis of chemical compounds like BTO.","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/biot.70085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

MSC-Derived Exosomes Alleviate Intestinal Barrier Injury in an IBD-on-a-Chip msc来源的外泌体减轻ibd芯片中的肠屏障损伤

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-23 DOI: 10.1002/biot.70081

Yingying Xie, Xiuli Guan, Mingxian Liu, Tiantian Tan, Min Zhang, Xu Zhang, Jianhua Qin

{"title":"MSC-Derived Exosomes Alleviate Intestinal Barrier Injury in an IBD-on-a-Chip","authors":"Yingying Xie, Xiuli Guan, Mingxian Liu, Tiantian Tan, Min Zhang, Xu Zhang, Jianhua Qin","doi":"10.1002/biot.70081","DOIUrl":"https://doi.org/10.1002/biot.70081","url":null,"abstract":"<div>\u0000 \u0000 Inflammatory bowel disease (IBD) is a chronic, nonspecific inflammatory condition affecting the colon or gastrointestinal tract, with an unknown etiology. Given the unclear pathogenesis, the development of preclinical models becomes particularly crucial for reflecting its pathological features and supporting effective therapies. In this study, we developed a pumpless IBD-on-a-chip model that allows to replicate the key pathological changes of IBD, including intestinal barrier disruption, intestinal villus destruction, macrophage polarization, inflammatory response, and vascular endothelial detachment. This model was utilized to evaluate the therapeutic effects of 5-Amino Salicylic Acid (5-ASA) and mesenchymal stem cell (MSC)-derived exosomes (MSC-Exos). The results demonstrated that both 5-ASA and MSC-Exos could relieve intestinal damage by protecting the villous structure. Additionally, we discovered that MSC-Exos could suppress inflammatory responses on the chip by inducing macrophage differentiation toward the M2 phenotype, while transcriptomic analysis revealed both activation and inhibition of specific inflammation-related pathways. This study presents the first application of an IBD-on-a-chip model to evaluate the therapeutic efficacy of MSC-Exos, highlighting its potential for advancing new therapeutic strategies for this debilitating disease.\u0000 </div>","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coated Bacterial Vaccine: A New Approach for Antigen Display on Bacterial Surface 包被细菌疫苗：抗原在细菌表面展示的新方法

IF 3.2 3区生物学

Biotechnology Journal Pub Date : 2025-07-17 DOI: 10.1002/biot.70015

Inés Harguindeguy, Matías H. Assandri, Juan P. Gorgojo, Yanina Hiriart, Vanina Alarcón, María A. Huergo, Sebastián F. Cavalitto, María de los A. Serradell, Gastón E. Ortiz

{"title":"Coated Bacterial Vaccine: A New Approach for Antigen Display on Bacterial Surface","authors":"Inés Harguindeguy, Matías H. Assandri, Juan P. Gorgojo, Yanina Hiriart, Vanina Alarcón, María A. Huergo, Sebastián F. Cavalitto, María de los A. Serradell, Gastón E. Ortiz","doi":"10.1002/biot.70015","DOIUrl":"https://doi.org/10.1002/biot.70015","url":null,"abstract":"<div>\u0000 \u0000 Bacterial vaccines using recombinant antigens displayed on the bacterial surface represent a major advancement in vaccine development. This approach leverages bacteria's natural ability to induce immune responses while improving vaccine targeting and efficacy. Existing platforms, such as live bacterial vaccines, inactivated bacterial vaccines, and bacterial-like particles (BLPs), face challenges like genetic modifications, antigen dilution, and degradation. To address these limitations, a novel system called coated bacterial vaccine (CBV) is proposed, combining the properties of inactivated bacterial vaccines and BLPs technology. The recombinant antigen is fused to the carboxy-terminal cell wall-binding domain of the Lactobacillus SlpA protein (dSLPA) and anchored in vitro on chemically inactivated Gram-positive bacteria. To validate this system, CBVs were created using inactivated B. subtilis 15245 and the TTFC antigen, a fragment of tetanus toxin (TeTx) fused with dSLPA. CBVs were used to immunize BALB/c mice, and anti-TTFC IgG antibodies were measured. Mice were then challenged with TeTx to assess the protective effects of CBVs. Results showed a 100% survival rate in vaccinated mice after TeTx challenge, driven by a robust anti-TTFC IgG response, particularly elevated IgG1 levels. Additionally, macrophage stimulation assays showed increased mRNA levels for IL-1β, IL-6, and IL-10, along with significant IL-6 secretion. These findings demonstrate that CBVs based on B. subtilis can promote active immune protection against TeTx challenge, likely mediated by a Th2-polarized immune response, highlighting the potential of CBVs as a versatile tool for developing new-generation vaccines.\u0000 </div>","PeriodicalId":134,"journal":{"name":"Biotechnology Journal","volume":"20 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0