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Structural modification of mung bean protein isolate via heat–pH shifting and limited enzymatic hydrolysis: Enhancing gelation of additive-free yogurt 通过热ph变化和有限酶水解对绿豆分离蛋白进行结构修饰:增强无添加剂酸奶的凝胶化
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-02-09 DOI: 10.1016/j.fbio.2026.108445
Yutong Hu , Ying Wang , Xiaohong Sun , Li Wang , Jiang Jiang
Legume protein–based yogurts formulated without added fat or stabilizers typically exhibit poor gelation capacity and are prone to phase separation. To overcome this limitation and extend the applicability of pH-shifting in yogurt systems, a synergistic modification strategy for mung bean protein isolate (MBPI) was developed by integrating heat–alkali treatment (pH 10.5, 50 °C) with limited proteolysis using papain or bromelain. SDS–PAGE analysis showed that papain induced controlled hydrolysis while largely preserving the medium-molecular-weight protein fractions. Compared with native MBPI (solubility: 23.7 %), MBPI subjected to pH-shifting combined with papain treatment exhibited a pronounced increase in solubility (75.5 %) and formed gels with enhanced water-holding capacity (WHC, 78.6 %) and improved viscoelastic properties (G′/G″). The combined treatment slightly reduced gel hardness due to particle size reduction, resulting in a finer gel structure suitable for yogurt products. LF-NMR analysis further confirmed a more restricted water distribution within the modified gels, indicating the formation of a stable and cohesive gel network. Overall, these findings demonstrate an effective approach for alleviating textural limitations in plant-based yogurts and support the development of high-quality, clean-label fermented products.
没有添加脂肪或稳定剂的豆科蛋白酸奶通常表现出较差的凝胶能力,并且容易相分离。为了克服这一限制,扩大酸碱度变化在酸奶体系中的适用性,研究人员开发了一种协同改性策略,将热碱处理(pH 10.5, 50°C)与木瓜蛋白酶或菠萝蛋白酶的有限蛋白水解相结合。SDS-PAGE分析表明,木瓜蛋白酶诱导了受控水解,同时在很大程度上保留了中等分子量的蛋白质部分。与天然MBPI(溶解度:23.7%)相比,经ph转移联合木瓜蛋白酶处理的MBPI溶解度显著增加(75.5%),形成的凝胶具有增强的持水能力(WHC, 78.6%)和改善的粘弹性(G′/G″)。由于颗粒大小的减小,联合处理略微降低了凝胶硬度,从而产生适合酸奶产品的更精细的凝胶结构。LF-NMR分析进一步证实了改性凝胶内的水分布更受限制,表明形成了一个稳定和有凝聚力的凝胶网络。总的来说,这些发现证明了一种有效的方法,可以减轻植物性酸奶的质地限制,并支持开发高质量、清洁标签的发酵产品。
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引用次数: 0
Bifidobacterium pseudocatenulatum AL44 ameliorates Enterococcus faecium-induced lung inflammation through NLRP3 suppression along the gut-lung axis 假芽双歧杆菌AL44通过沿肠-肺轴抑制NLRP3改善粪肠球菌诱导的肺部炎症
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-02-04 DOI: 10.1016/j.fbio.2026.108395
Shugang Li , Weiyun Zheng , Wudeng Wang , Xiaomeng Ren , Shuang Song , Chunqing Ai
The gut microbiota plays an important role in regulating pulmonary inflammation via the gut-lung axis. In this study, Bifidobacterium pseudocatenulatum AL44, isolated from healthy infant feces, was evaluated in a mouse model of Enterococcus faecium-induced pneumonia. AL44 treatment markedly alleviated lung histopathological injury, oxidative stress, and inflammatory macrophage polarization. These protective effects were associated with modulation of the gut microbiota, characterized by the enrichment of beneficial taxa, enhanced intestinal barrier integrity, and reduced systemic endotoxin and inflammatory cytokine levels. Targeted serum metabolomics revealed significant alterations in amino acid metabolism, particularly within the glycine-serine-threonine-betaine pathway. In vitro studies showed that betaine, a key AL44-associated metabolite, suppressed lipopolysaccharide (LPS)-induced inflammatory response by inhibiting activation of NOD-like receptor family pyrin domain containing 3 (NLRP3) signaling pathway. Collectively, these results imply that AL44 mitigates pulmonary inflammation via modulation of the gut-lung axis, with betaine-mediated suppression of the NLRP3 signaling representing a potential pathway, supporting AL44 as a promising probiotic candidate for the management of pneumonia.
肠道微生物群通过肠-肺轴在调节肺部炎症中起重要作用。在这项研究中,从健康的婴儿粪便中分离出假芽孢双歧杆菌AL44,在粪便肠球菌诱导的肺炎小鼠模型中进行了评估。AL44治疗可显著减轻肺组织病理学损伤、氧化应激和炎性巨噬细胞极化。这些保护作用与肠道菌群的调节有关,其特征是有益菌群的富集,肠道屏障完整性的增强,以及全身内毒素和炎症细胞因子水平的降低。靶向血清代谢组学揭示了氨基酸代谢的显著改变,特别是在甘氨酸-丝氨酸-苏氨酸-甜菜碱途径中。体外研究表明,甜菜碱是al44相关的关键代谢物,通过抑制nod样受体家族pyrin domain containing 3 (NLRP3)信号通路的激活,抑制脂多糖(LPS)诱导的炎症反应。总的来说,这些结果表明AL44通过调节肠-肺轴减轻肺部炎症,甜菜碱介导的NLRP3信号的抑制代表了一个潜在的途径,支持AL44作为治疗肺炎的有希望的益生菌候选物。
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引用次数: 0
Enhanced suppression of retrogradation and digestibility in waxy rice starch by engineered mutants of GtfC type 4,6-α-glucanotransferase from Geobacillus sp. Geobacillus sp. GtfC型4,6-α-葡聚糖转移酶工程突变体增强对糯米淀粉降解和消化率的抑制作用
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-02-04 DOI: 10.1016/j.fbio.2026.108422
Dan Li , Yuwei Liu , Cuicui Duan , Fumin Ma , Byung-Hoo Lee , Xiaolei Li
GtfC type 4,6-α-glucanotransferase could induce short branches in starch by catalyzing inter- or inside-chain transglycosylation. To improve activity of wild-type (WT) GsGtfC from Geobacillus sp., 15 mutants were engineered by site-directed mutagenesis based on amino acid alignments, enzyme-substrate docking and dynamic simulation. At 2 U/g starch, five mutants with increased specific activity by 1.02–1.63-fold reduced molecular weight of starch from 8.85 × 107 to 4.18 × 107–9.58 × 106 and increased DP ≤ 12 short branches from 33.18 to 35.77–43.65%, compared with WT. Retrogradation enthalpy of starch modified by K342V and WT reduced to 0.27 J/g and 0.69 J/g on the 14th day. RDS (rapidly digestible starch) of starch modified by K520A and WT decreased to 75.91% and 83.20%, and SDS (slowly digestible starch) increased to 22.88% and 11.85%. Glucose release from starch modified by K342V, K520A and D350N in a decreased order was significantly lower than that of WT from 120 to 360 min at small intestinal α-glucosidase level. Amino acid substitution strengthened enzyme-substrate affinity and stabilized critical hydrophobic interactions to enhance activity.
GtfC型4,6-α-葡聚糖转移酶通过催化链间或链内转糖基化诱导淀粉短分支。为了提高Geobacillus sp.野生型(WT) GsGtfC的活性,采用基于氨基酸比对、酶-底物对接和动态模拟的定点诱变技术,设计了15个突变体。在2 U/g淀粉浓度下,5个比活性提高1.02 ~ 1.63倍的突变体淀粉分子量从8.85 × 107降低到4.18 × 107 ~ 9.58 × 106, DP≤12短枝从33.18增加到35.77 ~ 43.65%,第14天K342V和WT改性淀粉的降解焓分别降低到0.27 J/g和0.69 J/g。经K520A和WT改性的淀粉的快速消化淀粉RDS分别为75.91%和83.20%,慢消化淀粉SDS分别为22.88%和11.85%。在小肠α-葡萄糖苷酶水平下,K342V、K520A和D350N改性淀粉的葡萄糖释放量在120 ~ 360 min显著低于WT。氨基酸取代增强酶与底物的亲和力,稳定临界疏水相互作用以增强活性。
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引用次数: 0
Mechanism of water regulation-flexible extrusion in promoting garlic peeling: cell wall disruption and adhesion weakening 水分调节-柔性挤压促进大蒜脱皮的机理:细胞壁破坏和粘附减弱
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-01-27 DOI: 10.1016/j.fbio.2026.108378
Gaoqun He , Xinshuo Wang , Wenjian Yang , Shuqin Xia , Khizar Hayat , Heping Cui , Jingyang Yu , Shahzad Hussain
Peeling is critical in garlic processing, impacting product quality and economic efficiency. A pretreatment coupling water regulation with flexible extrusion was developed to improve pneumatic peeling efficiency, with its mechanism explored. Convective drying (40 °C/8 h) reduced peel moisture content to 10.3 % (wet basis), and subsequent flexible extrusion (10–15 N/7 s) treatment achieved a pneumatic peeling rate of 97.4 % with minimal quality deterioration. Water in the garlic peel cell wall was effectively removed during water regulation, disrupting the integrity of its polysaccharide network structure. Meanwhile, the mechanical strength of the peel and molecular weight of pectin were reduced. In addition, water removal damaged the epidermal wax layer and caused cellular contraction and collapse, thereby weakening the adhesion of the middle lamella. Furthermore, flexible extrusion induced cracks on the peel, facilitating peel fragmentation and removal. The results lay the groundwork for efficient peeling of irregular and thermosensitive agricultural products.
大蒜脱皮是大蒜加工的关键环节,影响产品质量和经济效益。为了提高气动脱皮效率,提出了一种预处理耦合调水与柔性挤压的方法,并对其机理进行了探讨。对流干燥(40°C/8 h)将果皮含水率降低至10.3%(湿基),随后的柔性挤出(10-15 N/7 s)处理实现了97.4%的气动脱皮率,质量下降最小。在水分调节过程中,大蒜皮细胞壁中的水分被有效地去除,破坏了其多糖网络结构的完整性。同时,果皮的机械强度和果胶的分子量降低。此外,除水破坏了表皮蜡层,导致细胞收缩和塌陷,从而削弱了中间薄片的粘附性。此外,柔性挤压在剥皮上产生裂纹,有利于剥皮的破碎和去除。研究结果为不规则和热敏性农产品的高效脱皮奠定了基础。
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引用次数: 0
Dietary lipids synergistically enhance PAH bioavailability and intestinal toxicity: Mechanistic insights from a Caco-2 model 膳食脂类协同提高多环芳烃的生物利用度和肠道毒性:Caco-2模型的机制见解
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-01-26 DOI: 10.1016/j.fbio.2026.108374
Xiaofang Liu , Jie Zhu , Wanyi Zou , Li Liang , Jixian Zhang , Chaoting Wen , Youdong Li , Guoyan Liu , Xin Xu
This study employed a Caco-2 intestinal model to evaluate the impact of soybean oil and its fatty acid constituents (oleic acid (OA), linoleic acid (LA), and linolenic acid (LNA)) on the intestinal absorption, transport, and toxicity of benzo[a]pyrene (BaP) and benzo[b]fluoranthene (BbF). Key findings demonstrated that dietary lipids significantly enhanced the bioavailability of polycyclic aromatic hydrocarbons (PAHs) through synergistic active-passive transport mechanisms. Specifically, oil carriers increased BaP absorption by 14–17 % and BbF absorption by 12–15 % compared to free PAHs. Lipid-carried PAHs induced concentration-dependent cytotoxicity characterized by progressive lipid accumulation, elevated oxidative stress, mitochondrial membrane potential collapse, and apoptosis. The carrier-mediated enhancement followed a consistent potency gradient: free PAHs < OA < LNA < LA < oil carriers, implying the synergistic effect of multiple fatty acids in the oil carrier. These findings establish a pathological cycle of lipid-enhanced PAH absorption → intestinal barrier damage → further PAH accumulation, providing the first experimental analysis of dietary lipid-mediated PAH bioavailability and direct evidence for assessing PAH exposure risks in lipid-rich foods.
本研究采用Caco-2肠道模型,评估大豆油及其脂肪酸成分(油酸(OA)、亚油酸(LA)和亚麻酸(LNA))对苯并[a]芘(BaP)和苯并[b]芴(BbF)肠道吸收、转运和毒性的影响。主要研究结果表明,膳食脂类通过协同主动-被动转运机制显著提高了多环芳烃(PAHs)的生物利用度。具体来说,与游离多环芳烃相比,油载体增加了14 - 17%的BaP吸收和12 - 15%的BbF吸收。脂质携带多环芳烃诱导浓度依赖性细胞毒性,其特征为进行性脂质积累、氧化应激升高、线粒体膜电位塌陷和细胞凋亡。载体介导的增强遵循一致的效势梯度:游离PAHs <; OA < LNA < LA <;油载体,说明油载体中存在多种脂肪酸的协同作用。这些发现建立了一个脂质增强的多环芳烃吸收→肠屏障损伤→多环芳烃进一步积累的病理循环,首次提供了饮食脂质介导的多环芳烃生物利用度的实验分析,并为评估富含脂质食物中多环芳烃暴露风险提供了直接证据。
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引用次数: 0
Integrated transcriptome and data-independent acquisition proteome analysis of the biosynthesis of Monascus azaphilone pigments and citrinin 红曲霉红素色素和柑桔素生物合成的整合转录组和数据独立获取蛋白质组分析
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-01-26 DOI: 10.1016/j.fbio.2026.108377
Yingying Huang , Yanchun Shao , Chenglong Yang , István Molnár
Monascus azaphilone pigments (MPs) are widely used functional food additives. However, Monascus may simultaneously produce the mycotoxin citrinin (CIT), compromising MPs safety. Here, we used comparative genome, transcriptome, and quantitative data-independent acquisition mass spectrometry (DIA-MS) proteome analyses to compare three representative Monascus purpureus strains: M3 with high MPs and high CIT titers, M34 with high MPs and low CIT titers, and M69 with low titers of both products. Comparative genomic analysis confirmed high similarity among these strains. Differentially expressed genes (DEGs) and differentially abundant proteins (DAPs) were identified by pairwise comparisons among the strains during peak metabolite production, and selected DEGs and DAPs were verified by reverse transcription quantitative polymerase chain reaction and parallel reaction monitoring. An integrated analysis revealed DEG/DAPs correlating with altered MPs and CIT production, providing insights for strain breeding to engineer safer and more efficient MPs production processes in the food, cosmetics and pharmaceutical industries.
红曲霉色素是应用广泛的功能性食品添加剂。然而,红曲霉可能同时产生霉菌毒素citrinin (CIT),影响MPs的安全性。在这里,我们使用比较基因组、转录组和定量数据独立获取质谱(DIA-MS)蛋白质组分析来比较三种具有代表性的红曲霉菌株:M3具有高MPs和高CIT滴度,M34具有高MPs和低CIT滴度,M69具有两种产品的低滴度。比较基因组分析证实了这些菌株之间的高度相似性。在代谢产物产生高峰时,通过两两比较鉴定菌株间的差异表达基因(DEGs)和差异丰富蛋白(DAPs),并通过反转录定量聚合酶链反应和平行反应监测对所选的DEGs和DAPs进行验证。一项综合分析显示,DEG/DAPs与改变的MPs和CIT生产相关,为菌株育种提供了见解,以便在食品、化妆品和制药行业设计更安全、更高效的MPs生产流程。
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引用次数: 0
Reformulating savory biscuit-like snacks for a healthier diet by using ancient grain and glasswort powder: effect on quality, sensory descriptors and acceptability 通过使用古老的谷物和玻璃草粉,为更健康的饮食重新制定美味的饼干状零食:对质量,感官描述符和可接受性的影响
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-01-24 DOI: 10.1016/j.fbio.2026.108310
Antonio Derossi, Grazia Marinaro, Carmela Lamacchia, Rossella Caporizzi, Giulia Conversa
Aligning with the growing demand for salt reduction strategies and the need to protect food biodiversity, this study aims to develop healthy savory biscuit-like snacks with reduced sodium content. An ancient (Automonia B) and modern (Bolero) soft wheat variety were combined with various concentrations of salt (0 %, 1 %, 2 %) and glasswort powder (1 %, 4 %, and 8 %).
Physical and microstructural analysis revealed that Bolero samples exhibited significantly higher hardness values (76.88 ± 15.4 N) compared to Autonomia B (54.5 ± 11.5 N). However, hardness decreased in both varieties as the concentration of glasswort increased, reaching average values of 67.17 ± 5 N for Bolero and 41.6 ± 3.5 N for Autonomia B. The total porosity of Bolero snacks was lower compared to Autonomia B, but other microstructural attributes, e.g. structure thickness and separation, were closely linked to textural properties. Salt and glasswort concentrations significantly influenced the sensory properties of biscuits formulated with two wheat varieties, while visual attributes remained consistently acceptable. Saltiness perception was mainly driven by salt but was also significantly enhanced by glasswort, supporting its role as a natural “green salt” ingredient. Overall taste showed a non-linear response, with moderate salt and glasswort levels maximizing pleasantness. These results highlight glasswort as a promising strategy for sodium reduction without compromising sensory quality, offering an innovative, scalable and biodiversity-enhancing strategy solution for industry-driven salt-reduction programs.
为了适应不断增长的减盐战略需求和保护食物生物多样性的需要,本研究旨在开发低钠、健康可口的饼干状零食。古代(Automonia B)和现代(Bolero)软小麦品种与不同浓度的盐(0%,1%,2%)和玻璃草粉(1%,4%和8%)结合使用。物理和显微结构分析表明,Bolero样品的硬度值(76.88±15.4 N)明显高于Autonomia B(54.5±11.5 N)。然而,随着玻璃草浓度的增加,两个品种的硬度都有所下降,Bolero的硬度平均值为67.17±5 N, Autonomia B的硬度平均值为41.6±3.5 N。Bolero零食的总孔隙率低于Autonomia B,但其他微观结构属性,如结构厚度和分离度,与质地特性密切相关。盐和玻璃草浓度显著影响了用两种小麦制成的饼干的感官特性,而视觉特性保持一致。咸度感主要由盐驱动,但玻璃草也显著增强,支持其作为天然“绿色盐”成分的作用。整体口味呈非线性反应,适度的盐和玻璃草水平使愉悦感最大化。这些结果突出了玻璃草作为一种有前途的减钠策略而不影响感官质量,为工业驱动的减盐计划提供了一种创新的、可扩展的和增强生物多样性的策略解决方案。
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引用次数: 0
Identification and molecular mechanism of tilapia skin-derived collagen peptides mitigating aging using zebrafish aging model 利用斑马鱼衰老模型鉴定罗非鱼皮肤源性胶原蛋白肽延缓衰老的分子机制
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-01-24 DOI: 10.1016/j.fbio.2026.108363
Ge Xu , Longbin Tan , Jiewen Tan , Wenzhu Zhao , Zhipeng Yu
Tilapia skin collagen peptides possess multiple biological functions, yet their potential value remains underdeveloped and underutilized. This study investigated the efficacy and mechanisms of tilapia skin collagen peptides (TSCPs) in mitigating aging. TSCPs significantly delayed aging progression in H2O2- and glucose-induced zebrafish models. Three tyrosinase-inhibitory peptides and five antiglycation peptides were identified in TSCPs through targeted screening. Specifically, peptides Ser-Glu-Gly-Lys (SEGK) and Asp-Asp-Asp (DDD) exhibited the strongest in vitro tyrosinase-inhibitory and antiglycation activity, respectively. Molecular dynamics simulations revealed that both peptides bound more stably to anti-aging targets (tyrosinase and receptor for advanced glycation end products (RAGE)) through hydrogen bonds and electrostatic interactions. Moreover, SEGK and DDD reduced reactive oxygen species (ROS), malondialdehyde (MDA), and advanced glycation end products (AGEs) levels in zebrafish models, thereby contributing to the preferable aging mitigation effects. These findings provide in-depth insights into the mechanisms by which TSCPs mitigate aging from the perspectives of antioxidation, antiglycation, and tyrosinase inhibition, offering a theoretical basis for the development of TSCPs-based functional foods.
罗非鱼皮肤胶原蛋白肽具有多种生物学功能,但其潜在价值尚未得到充分开发和利用。本研究探讨罗非鱼皮肤胶原蛋白肽(TSCPs)的抗衰老作用及其机制。在H2O2-和葡萄糖诱导的斑马鱼模型中,TSCPs显著延缓了衰老进程。通过靶向筛选,在TSCPs中鉴定出3种酪氨酸酶抑制肽和5种抗糖化肽。其中,Ser-Glu-Gly-Lys (SEGK)肽和Asp-Asp-Asp (DDD)肽分别表现出最强的体外酪氨酸酶抑制活性和抗糖化活性。分子动力学模拟表明,这两种肽通过氢键和静电相互作用更稳定地结合到抗衰老靶点(酪氨酸酶和晚期糖基化终产物受体(RAGE))上。此外,SEGK和DDD降低了斑马鱼模型中的活性氧(ROS)、丙二醛(MDA)和晚期糖基化终产物(AGEs)水平,从而促进了较好的延缓衰老效果。这些发现从抗氧化、抗糖化、酪氨酸酶抑制等方面深入探讨了TSCPs延缓衰老的机制,为开发基于TSCPs的功能食品提供了理论基础。
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引用次数: 0
Synergistic quorum quenching effect and mechanism of penicillin G acylase combined with chlorogenic acid against Hafnia alvei and their application in salmon fillets preservation 青霉素G酰化酶联合绿原酸对肺泡Hafnia的协同群体猝灭作用及机理及其在鲑鱼鱼片保鲜中的应用
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-01-24 DOI: 10.1016/j.fbio.2026.108367
Xinran Lv, Hengli Xu, Yichang Sun, Xin Wen, Minghan Shan, Wenjin Yan, Qihan Bai, Sicheng Li, Siyan Du, Xuepeng Li, Jianrong Li , Hung-chuan Chiu
Hafnia alvei, a predominant spoilage bacterium in aquatic products, regulates its spoilage phenotypes through an N-acyl homoserine lactone (AHL)-mediated quorum sensing (QS) system. Penicillin G acylase (PGA), an eco-friendly quorum-quenching enzyme, and chlorogenic acid (CGA), a natural polyphenolic compound with antioxidant and antibacterial properties, were investigated for their combined inhibitory effects on QS and biofilm formation in H. alvei. Results showed that the PGA-CGA combination exhibited strong biofilm inhibition (29.88 %–59.18 %) and clearance (30.61 %–55.45 %) compared to individual treatments. Scanning electron microscopy revealed that PGA-CGA disrupted biofilm architecture, yielding thinner structures and dispersed bacterial colonies. Furthermore, the combination significantly suppressed some spoilage phenotypes, including violacein production, extracellular polysaccharide synthesis, biogenic amine accumulation, siderophore secretion, lipase activity, and motility, with inhibition rates ranging from 28.94 % to 100 %. Real-time PCR analysis revealed that PGA-CGA synergistically downregulated QS-associated (halI and halR), biofilm-related (flgA), spoilage-related (dppF), and motility-related (motB and kdsD) genes by 30 %–60 %, surpassing the effects of individual treatments. Metabolomic profiling further demonstrated that the combination disrupted carbohydrate and energy metabolism, amino acid and nucleotide biosynthesis, and biotin metabolism. Additionally, the PGA-CGA reduced the levels of total viable counts and total volatile base nitrogen in salmon fillets, and maintained good sensory quality during 12 d of storage. Therefore, the PGA-CGA combination is proposed as a promising novel agent for fish preservation.
作为水产品中主要的腐败菌,Hafnia alvei通过n -酰基高丝氨酸内酯(AHL)介导的群体感应(QS)系统调节其腐败表型。研究了生态友好型群体猝灭酶盘尼西林G酰化酶(PGA)和具有抗氧化和抗菌作用的天然多酚类化合物绿原酸(CGA)对肺泡芽孢杆菌QS和生物膜形成的联合抑制作用。结果表明,与单独处理相比,PGA-CGA组合具有较强的生物膜抑制作用(29.88% ~ 59.18%)和清除率(30.61% ~ 55.45%)。扫描电镜显示,PGA-CGA破坏了生物膜结构,产生更薄的结构和分散的细菌菌落。此外,该组合显著抑制了一些腐败表型,包括紫紫素产生、胞外多糖合成、生物胺积累、铁载体分泌、脂肪酶活性和运动,抑制率为28.94% ~ 100%。实时PCR分析显示,PGA-CGA协同下调了qs相关基因(halI和halR)、生物膜相关基因(flgA)、腐败相关基因(dppF)和运动相关基因(motB和kdsD) 30% - 60%,超过了单独处理的效果。代谢组学分析进一步表明,这种结合破坏了碳水化合物和能量代谢、氨基酸和核苷酸的生物合成以及生物素的代谢。此外,PGA-CGA降低了鲑鱼鱼片的总活菌数和总挥发性碱氮水平,并在12 d内保持了良好的感官品质。因此,PGA-CGA组合被认为是一种很有前途的新型鱼类保鲜剂。
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引用次数: 0
Dual-enhanced novel fluorescence quencher with internal hollow structure and external polydopamine layer for sensitive detection of chlortetracycline in milk 新型内中空外聚多巴胺层双增强荧光猝灭剂用于牛奶中氯四环素的灵敏检测
IF 5.9 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2026-01-23 DOI: 10.1016/j.fbio.2026.108364
Shijin Huang , Ganggang Zhang , Zongyou Chen , Jiawei Chen , Xiaocui Lai , Weihua Lai
Chlortetracycline (CTC), a broad-spectrum veterinary antibiotic, poses serious risks to human health through bioaccumulation due to excessive use. To address the critical need for CTC monitoring, we developed a fluorescence quenching lateral flow immunoassay (FQ-LFIA) employing black bimetallic hollow nanoparticles (BBHNPs) as quencher. BBHNPs were engineered with a unique dual-advantage architecture: an internal hollow structure for enhanced light capture capability and an external polydopamine layer for higher spectral overlap with fluorophores. This design resulted in exceptional photophysical characteristics, including a remarkable molar extinction coefficient (2.18 × 1012 L mol−1 cm−1) and an unprecedented fluorescence quenching constant (5.20 × 1013 L mol−1). BBHNP-based FQ-LFIA achieved a limit of detection (LOD) of 0.32 ng mL−1, representing a 6.91-fold improvement over conventional gold nanoparticle-based lateral flow immunoassay (LFIA). Validation studies in spiked milk samples showed excellent recovery rates (87.73–118.09 %) with high precision (coefficient of variation <10.36 %). Method comparison with liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis confirmed the reliability of BBHNP-FQ-LFIA for real-world applications.
氯四环素是一种广谱兽用抗生素,由于过量使用,会通过生物积累对人类健康造成严重危害。为了满足CTC监测的迫切需求,我们开发了一种荧光猝灭横向流动免疫测定(FQ-LFIA),采用黑色双金属空心纳米颗粒(BBHNPs)作为猝灭剂。BBHNPs具有独特的双重优势结构:内部中空结构增强光捕获能力,外部聚多巴胺层与荧光团具有更高的光谱重叠。这种设计产生了卓越的光物理特性,包括显著的摩尔消光系数(2.18 × 1012 L mol−1 cm−1)和前所未有的荧光猝灭常数(5.20 × 1013 L mol−1)。基于bbhnp的FQ-LFIA的检测限(LOD)为0.32 ng mL−1,比传统的基于金纳米颗粒的横向流动免疫分析法(LFIA)提高了6.91倍。对加标牛奶样品的验证研究表明,加标回收率为87.73 ~ 118.09%,精密度高(变异系数为10.36%)。方法与液相色谱-串联质谱(LC-MS/MS)分析的比较证实了BBHNP-FQ-LFIA在实际应用中的可靠性。
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Food Bioscience
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