BioTechPub Date : 2026-08-10DOI: 10.3390/biotech15030066
Jinhao Zou, Siyi Wang, Jingjiao Yong, Liangyu Yan, Hong Hui, Ye Sun
{"title":"Risk-Aware Computational Prioritization and Validation Route Design for Medicine-Food Homology Plant Compounds in a Parkinson's Disease Context.","authors":"Jinhao Zou, Siyi Wang, Jingjiao Yong, Liangyu Yan, Hong Hui, Ye Sun","doi":"10.3390/biotech15030066","DOIUrl":"10.3390/biotech15030066","url":null,"abstract":"<p><p>Network pharmacology studies of medicine-food homology plants have identified broad injury response pathways and hubs that cannot support compound-level or Parkinson's disease (PD)-specific claims. We developed a traceable, non-weighted framework that separates regulatory provenance, PD-context evidence, structural support, and safety/developability liabilities. A ten-plant feasibility panel was locked before overlap with a 1631-gene PD union, yielding 382 plant-associated targets and 190 strict intersections. Leave-one-plant-out analysis retained 173-190 targets, whereas disease source and threshold stress tests showed curation dependence. Whole-blood classifiers showed modest five-fold discrimination (area under the curve, 0.606-0.682) and were excluded from candidate decisions. Redocking-validated AutoDock Vina and protein-ligand interaction fingerprints retained baicalein-MMP9, baicalein-AKT1, and baicalein-BCL2 as caution-tagged follow-up pairs. Quercetin-MMP9 was retained as a liability-tagged comparator, while KCNH2 relations were safety-only. Because no biological validation is presented, these pairs remain hypotheses for prospective MPP<sup>+</sup>-treated SH-SY5Y testing with orthogonal injury, dopaminergic phenotypes, target dependency, material confirmation and safety controls. Baicalein remains source-pending for the material chain.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13511222/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148833184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-08-07DOI: 10.3390/biotech15030065
Carlo Esposito, Giancarlo Aldini, Yanan Yin, Stefano Gandolfi, Gianluca Ottolina, Francesco Secundo
{"title":"Effects of Orange Peel-Derived Carbon Sources on <i>Nannochloropsis salina</i> Mixotrophic Cultivation.","authors":"Carlo Esposito, Giancarlo Aldini, Yanan Yin, Stefano Gandolfi, Gianluca Ottolina, Francesco Secundo","doi":"10.3390/biotech15030065","DOIUrl":"10.3390/biotech15030065","url":null,"abstract":"<p><p>Microalgae are recognized as sustainable biofactories for metabolites relevant to nutraceutical, pharmaceutical, and marine drug applications. <i>Nannochloropsis salina</i> is notable for its production of bioactive lipids, including the pharmaceutically relevant omega-3 eicosapentaenoic acid (EPA). Here, we evaluated orange peel extract (OPE), a citrus by-product, as a substrate for mixotrophic cultivation of <i>N. salina</i> within a bioeconomy framework. OPE supplementation triggered dose-dependent physiological responses. Among the tested OPE concentrations, 5% supplementation resulted in the highest total fatty acid content, increasing fatty acids from 24.4% (control) to 30.6% and EPA from 6.4% to 9.8%, whereas 10% OPE maintained biomass pigmentation. Higher OPE levels enhanced antioxidant potential, raising total antioxidant capacity from 4.6 (control) to 6.7 mg/g vitamin C equivalents (with 10% OPE), while the highest concentrations induced metabolic stress, reducing biomass and altering lipid composition. Fourier transform infrared spectroscopy analyses revealed biochemical adjustments consistent with metabolic reorganization, including increased intensities of the amide I and II bands associated with protein-rich structures. Overall, OPE emerges as a cost-effective supplement capable of modulating the biochemical quality of <i>N. salina</i> while valorizing agro-industrial residues. The increases in EPA and antioxidant capacity support the potential of OPE-supplemented cultures as a platform for the production of marine-derived bioactive compounds.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13511695/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148832980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-08-06DOI: 10.3390/biotech15030064
Sofia Pires, Susana Casal, Tânia G Tavares, José C M Pires, Joana Oliveira
{"title":"Night-Time Biomass and Compositional Dynamics in <i>Chlorella vulgaris</i>: Optimisation of Harvesting Time.","authors":"Sofia Pires, Susana Casal, Tânia G Tavares, José C M Pires, Joana Oliveira","doi":"10.3390/biotech15030064","DOIUrl":"10.3390/biotech15030064","url":null,"abstract":"<p><p>Global population growth has emphasised the need to have sustainable and alternative sources of nutrients. In this context, microalgae have emerged as a potential solution due to their rich biochemical composition, including high-quality proteins, carbohydrates, lipids, and pigments. This study investigates the variation in microalgal growth and biochemical composition over a light:dark cycle, with a focus on the night period. Batch experiments were performed with eight <i>Chlorella vulgaris</i> cultures over a 7-day period. On the seventh day, biomass samples were collected at four time points in four-hour intervals and stored for subsequent biochemical analyses. During the eight-hour dark period, biomass, carbohydrate, and total chlorophyll concentrations decreased by 9%, 12.5%, and 14.4%, respectively. After four hours of light exposure, these parameters increased significantly by 6%, 15.4%, and 12.7%, respectively. Total protein, carotenoids, and fatty acid contents remained relatively stable throughout the evaluated cycle, although variations were observed in the carotenoid profile. During the dark phase, zeaxanthin decreased by 38.0%, whereas violaxanthin increased by 27.2%, suggesting complementary pigment interconversion consistent with xanthophyll cycle activity. Overall, these results highlight the importance of optimising harvesting time to enhance the production of target compounds in a sustainable production of microalgal biomass.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13510351/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148833132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-08-05DOI: 10.3390/biotech15030063
Reginald L McGee, Jake Reed, Gregory K Behbehani, Kevin R Coombes
{"title":"Differential Correlation Across Subpopulations of Single Cells in Subtypes of Acute Myeloid Leukemia.","authors":"Reginald L McGee, Jake Reed, Gregory K Behbehani, Kevin R Coombes","doi":"10.3390/biotech15030063","DOIUrl":"10.3390/biotech15030063","url":null,"abstract":"<p><p>Mass cytometers can record 40-50 parameters per single cell for millions of cells in a sample. Many methods have been developed to cluster phenotypically similar cells within cytometry data, but there are fewer methods to visualize activity and interactions of pairs of proteins across these populations. We have developed a workflow for analyzing correlations associated with predefined populations. By clustering blood samples from acute myeloid leukemia (AML) patients and normal controls using an established algorithm, we obtained a minimum spanning tree of clusters of single cells. Using surface marker expression, we identified clusters on the tree that belonged to phenotypes of interest. Next, we computed correlations between pairs of proteins in each cluster. We developed a novel, coherent, probability-based statistic to test differences between vectors of correlation coefficients. By comparing all combinations of the normal controls under the statistic, we created an empirical distribution that could provide a conservative threshold of differential correlation. Using this empirically derived distribution to define significance, we compared pooled samples from AML subtypes and normal controls to detect differential correlations. Given the structure present within this cytometry dataset, we found it natural to consider correlations in this manner versus aggregating all data and computing a single correlation. Our approach has the advantage that we can localize the statistical measure to determine contributions from particular phenotypic populations. Differentially correlated pairs of proteins can be further explored as possible testable hypotheses by considering a population's distribution of correlation coefficients or biaxially plotting protein expressions within individual cells in a given population.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13510416/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148832949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-08-03DOI: 10.3390/biotech15030062
Eduardo Mancilla, Marcos Pérez-Losada, Manuel Aira, Jorge Domínguez
{"title":"<i>Eisenia andrei</i> and <i>Tenebrio molitor</i> Divergently Restructure the Bacteriome and Mycobiome of Sewage Sludge with Contrasting Biosafety Consequences.","authors":"Eduardo Mancilla, Marcos Pérez-Losada, Manuel Aira, Jorge Domínguez","doi":"10.3390/biotech15030062","DOIUrl":"10.3390/biotech15030062","url":null,"abstract":"<p><p>The use of invertebrates for sewage sludge bioconversion offers a sustainable strategy for waste valorization, yet species-specific effects on microbial communities and biosafety remain unclear. Here, we compared the impacts of the earthworm <i>Eisenia andrei</i> (Ea) and the mealworm <i>Tenebrio molitor</i> (Tm) on the bacteriomes and mycobiomes of sewage sludge (ss) using <i>16S rRNA</i> and <i>ITS</i> amplicon sequencing. Gut passage in both Ea and Tm markedly altered bacterial and fungal composition relative to ss, but produced distinct community profiles with differential shifts across multiple taxa. Both invertebrates reduced bacterial richness by ~40%, while fungal responses diverged: Ea largely preserved mycobiome richness despite reduced evenness, whereas Tm caused a near-complete collapse (~83% Amplicon Sequence Variant loss). Beta diversity analyses revealed clear, non-overlapping separation among ss, Ea, and Tm for both microbial domains. Tm frass showed strong enrichment of clinically relevant bacterial pathogens, while Ea casts exhibited no such enrichment. For fungi, Ea reshaped pathogen composition, whereas Tm largely eliminated fungal pathogens through broad community collapse. Both treatments reduced predicted antibiotic resistance gene abundance, but functional profiles differed, with Ea showing greater functional stability. These findings demonstrate that microbiome restructuring during bioconversion is species-dependent, with contrasting ecological and biosafety implications for downstream environmental use.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13510514/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148832906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-07-31DOI: 10.3390/biotech15030061
Ricardo J Figueiredo, Guilherme Moreira, Ana Machado, Eliane Silva, Adriano A Bordalo, João R Mesquita
{"title":"Detection of an ExPEC-like <i>Escherichia coli</i> ST536 Isolated from Depurated Retail Mussels: Genomic Insights into Food Safety and One Health Surveillance.","authors":"Ricardo J Figueiredo, Guilherme Moreira, Ana Machado, Eliane Silva, Adriano A Bordalo, João R Mesquita","doi":"10.3390/biotech15030061","DOIUrl":"10.3390/biotech15030061","url":null,"abstract":"<p><p>Filter-feeding bivalves can accumulate fecal bacteria and antimicrobial resistance determinants, yet routine regulatory monitoring relies mainly on quantitative <i>Escherichia coli</i> criteria. This study provides a whole-genome characterization of an ExPEC-like <i>E. coli</i> ST536 (O21) isolate recovered from commercially depurated retail mussels originating from a Class B harvesting area in Portugal. The isolate was phenotypically identified by MicroScan WalkAway Plus and subjected to antimicrobial susceptibility testing and Oxford Nanopore long-read sequencing, followed by genome assembly, annotation, antimicrobial resistance and virulence screening, plasmid and prophage detection, and phylogenomic analysis. Phenotypically, only resistance to tobramycin was detected using the MicroScan WalkAway system. Genomic analysis revealed a complex mobile element-rich architecture, including multiple resistance-associated determinants, 116 virulence-associated loci, prophage regions, and a mobilizable IncY plasmid carrying CTX-like class A β-lactamase-associated hits detected by ABRicate. Despite its ST536 assignment and ExPEC-associated traits, phylogenomic analysis placed the isolate within a phylogroup A/commensal-like background rather than among classical B2 ExPEC lineages, suggesting acquisition of pathoadaptive modules by an atypical environmental lineage. These findings highlight the potential utility of WGS as a complementary tool and suggest that depurated bivalves may serve as sentinels, warranting further investigation.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13510357/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148832960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Germination-Induced Variations in Proximate Composition, Phytochemical Profile and Antioxidant Activities of White Sesame Seeds: A Green Approach for Nutritional Modification.","authors":"Oneeza Anwar, Iahtisham-Ul-Haq, Ramiz Arif, Waqas Ahmed, Hafiz Ansar Rasul Suleria","doi":"10.3390/biotech15030060","DOIUrl":"10.3390/biotech15030060","url":null,"abstract":"<p><p>Germination is a cost-effective bioprocessing technique for enhancing seed properties such as sesame seeds, an underutilized seed crop. This research evaluates modifications in physicochemical and antioxidant activity of white sesame seeds (<i>Sesamum indicum</i> L.) influenced by germination. In this context, non-germinated seeds and germinated seeds at 24, 48, 72, 96, and 120 h were evaluated separately for their phytochemical profile, including TFC (aluminum chloride colorimetric method), TPC (Folin-Ciocalteu method) and antioxidant properties (DPPH and ABTS radical scavenging assays). Significant variations in the proximate composition, phytochemical densities, and antioxidant activities of white sesame seeds were observed as influenced by germination. The statistical analysis showed an increase in flavonoid content when germination was extended to 48 h, but a decline when extended beyond 48 h, whereas higher polyphenol quantities were observed in sesame seeds germinated for 96 and 120 h. The DPPH activity of germinated (24 h) sesame seed extracts was highest. In contrast, ABTS activity was higher in non-germinated seeds than in seeds germinated for 96 h, and it began to decline at 120 h. In general, a negative correlation between antioxidant activity and extended germination time (120 h) has been observed. For the incorporation of sesame seeds into functional food products, 48 h of germination appeared to have potential suitability for a favorable antioxidant and phytochemical profile.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13510433/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148833110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-07-28DOI: 10.3390/biotech15030059
Xiaoyue Zheng, Hao Li, Shu Wang, Huiyan Cheng, Huien Zhao
{"title":"Establishment of a High-Efficiency In Vitro Regeneration and <i>Agrobacterium</i>-Mediated Genetic Transformation System for <i>Ajania achilleoides</i> (Turcz.) Poljakov.","authors":"Xiaoyue Zheng, Hao Li, Shu Wang, Huiyan Cheng, Huien Zhao","doi":"10.3390/biotech15030059","DOIUrl":"10.3390/biotech15030059","url":null,"abstract":"<p><p><i>Ajania achilleoides</i>, a wild species with strong environmental adaptability, is a valuable germplasm resource for genetic improvement and functional gene studies. However, efficient in vitro regeneration and genetic transformation systems for this species remain undeveloped, limiting functional gene characterization and genetic improvement of this valuable germplasm resource. In this study, leaf explants were used to establish an efficient regeneration system by evaluating different combinations of plant growth regulators and to develop an <i>Agrobacterium</i> tumefaciens-mediated genetic transformation system for <i>A. achilleoides</i>. MS medium supplemented with 2.0 mg/L 6-benzyladenine (6-BA) and 1.0 mg/L α-naphthaleneacetic acid (NAA) achieved the highest adventitious shoot regeneration rate (99%), while 1/2 MS medium containing 0.5 mg/L indole-3-butyric acid (IBA) was optimal for rooting, resulting in a 100% rooting rate. Critical hygromycin concentrations for shoot regeneration and rooting selection were determined to be 25 mg/L and 10 mg/L, respectively. For transformation, the best results were obtained with a 3-day preculture, bacterial suspension at OD<sub>600</sub> = 0.2, 30 min infection, and 2-day co-cultivation. PCR and sequencing confirmed the successful integration of the target genes into the genome, yielding three positive transgenic lines with a molecular confirmation rate of 30%. This study establishes a stable and efficient regeneration and transformation system for <i>A. achilleoides</i>, providing a platform for functional gene analysis and molecular breeding of wild chrysanthemum species.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13511080/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148833060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-07-23DOI: 10.3390/biotech15030058
Soroosh Najafi, Maryam Jojani, Kianoosh Najafi, Giovanni N Roviello
{"title":"Omics Approaches in Hantavirus Research: Current Advances, Challenges, and Future Perspectives.","authors":"Soroosh Najafi, Maryam Jojani, Kianoosh Najafi, Giovanni N Roviello","doi":"10.3390/biotech15030058","DOIUrl":"10.3390/biotech15030058","url":null,"abstract":"<p><p>Hantaviruses are zoonotic RNA viruses responsible for two severe human diseases: hemorrhagic fever with renal syndrome (HFRS) and hantavirus cardiopulmonary syndrome (HCPS). Worldwide case fatality rates vary from 1% to 40%. Although single-layer genomics, transcriptomics, proteomics, and metabolomics studies have advanced our understanding of hantavirus biology, true multi-omics integration remains scarce, leaving systems-level mechanisms of disease severity and host-pathogen interactions unresolved. High-throughput omics technologies have greatly advanced the study of hantavirus-host interactions. This review summarizes genomic, transcriptomic, proteomic, metabolomic, and AI-enabled approaches in hantavirus research. Genomic studies have clarified viral diversity, evolution, and reassortment, while transcriptomics has identified regulatory networks governing endothelial and innate immune responses. Proteomics has revealed host proteins involved in immune regulation, endothelial dysfunction, and potential therapeutic targeting, whereas metabolomics indicates substantial metabolic reprogramming during infection, although dedicated studies remain limited. AI-based approaches are increasingly applied to outbreak prediction, surveillance, and risk modeling. Drawing on successful multi-omics frameworks developed for other viral infections, we discuss opportunities to improve biomarker discovery, surveillance, therapeutic development, and future precision medicine strategies for hantavirus infections.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13511750/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148833196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BioTechPub Date : 2026-07-21DOI: 10.3390/biotech15030057
Ekaterina Scheglova, Sabina Nebieva, Kamilla Mekhantseva, Siarhei Bukhalovich, Anna Kudryavtseva, Nikolay Bondarev, Nikolay Ilyinsky, Sergey Bazhenov, Ilya Manukhov
{"title":"Psychrophilic Quorum Sensing Genes Enable Unimodal, Adjustable Protein Expression Across the Entire <i>Escherichia coli</i> Population.","authors":"Ekaterina Scheglova, Sabina Nebieva, Kamilla Mekhantseva, Siarhei Bukhalovich, Anna Kudryavtseva, Nikolay Bondarev, Nikolay Ilyinsky, Sergey Bazhenov, Ilya Manukhov","doi":"10.3390/biotech15030057","DOIUrl":"10.3390/biotech15030057","url":null,"abstract":"<p><p>A previous study demonstrated that quorum sensing (QS) genes from the psychrophilic bacterium <i>Aliivibrio logei</i> can be used in <i>Escherichia coli</i> to obtain bacterial cultures with controlled amounts of a target protein. However, the QS system may be induced non-uniformly across the cell population. In this study, we used an expression vector containing <i>luxR/luxI</i> regulatory genes from <i>A. logei</i> carrying <i>sfGFP</i> as a reporter gene. Reporter expression was regulated by the autoinducer 3OxoC6-HSL, activated at 22 °C, and terminated at 37 °C. Flow cytometry was used to assess the GFP fluorescence distribution at the single-cell level. The system provided dose-dependent unimodal expression lacking formation of distinct ON/OFF subpopulations, while the robust coefficient of variation decreased with increasing autoinducer concentration. The autoinducer synthase LuxI enabled autoinduction, but under the tested conditions, no substantial effect on expression homogeneity was detected. Raising the temperature to 37 °C effectively halted expression, allowing intermediate target protein values to be fixed at the single-cell level. Overall, the developed system represents a promising tool for biotechnological applications requiring precise and uniform control of expression.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":"15 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13398223/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148580397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}