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1.
J Sci Food Agric ; 104(2): 1030-1038, 2024 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-37721428

RESUMO

BACKGROUND: Tumbling treatment is widely used in the production of cooked ham. However, traditional intermittent tumbling (IT) treatment is time-consuming. To enhance the tumbling efficiency, high-intensity ultrasound was used to assist IT treatment (UIT). RESULTS: UIT treatment reduced the tumbling time and significantly improved the water holding capacity, tenderness, sliceability and texture of cooked ham compared to IT treatment. Furthermore, more violent destruction of meat tissue was exhibited in the UIT treatment. This change facilitated extraction of more salt-soluble protein, which in turn welded meat pieces tightly and improved the quality of the cooked ham. CONCLUSION: UIT treatment could accelerate the tumbling process and enhance the quality of cooked ham. These results may provide guidance on effective strategies for a high-quality meat production process. © 2023 Society of Chemical Industry.


Assuntos
Produtos da Carne , Produtos da Carne/análise , Culinária/métodos , Carne , Músculos , Cloreto de Sódio
2.
Crit Rev Food Sci Nutr ; : 1-27, 2023 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-37335106

RESUMO

Gut microbiota (GM) is an invisible organ that plays an important role in human health. Increasing evidence suggests that polyphenols in pomegranate (punicalagin, PU) could serve as prebiotics to modulate the composition and function of GM. In turn, GM transform PU into bioactive metabolites such as ellagic acid (EA) and urolithin (Uro). In this review, the interplay between pomegranate and GM is thoroughly described by unveiling a dialog in which both actors seem to affect each other's roles. In a first dialog, the influence of bioactive compounds from pomegranate on GM is described. The second act shows how the GM biotransform pomegranate phenolics into Uro. Finally, the health benefits of Uro and that related molecular mechanism are summarized and discussed. Intake of pomegranate promotes beneficial bacteria in GM (e.g. Lactobacillus spp., Bifidobacterium spp.) while reducing the growth of harmful bacteria (e.g. Bacteroides fragilis group, Clostridia). Akkermansia muciniphila, and Gordonibacter spp., among others, biotransform PU and EA into Uro. Uro contributes to strengthening intestinal barrier and reducing inflammatory processes. Yet, Uro production varies greatly among individuals and depend on GM composition. Uro-producing bacteria and precise metabolic pathways need to be further elucidated therefore contributing to personalized and precision nutrition.


Gut microbiota plays a critical role in maintaining host health.Pomegranate is rich in bioactive components.Consumption of pomegranate positively modulates gut microbiota.Gut microbiota can transform ellagitannins in pomegranate into urolithin.Urolithin has high bioavailability and multiple health benefits.

3.
Crit Rev Food Sci Nutr ; 63(29): 9716-9730, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35603708

RESUMO

Non-thermal processing methods, such as cold plasma (CP), high pressure processing (HPP) and pulsed electric fields (PEF), have been proposed for natural and fresh-like foods to inactivate microorganisms at nearly-ambient or moderate temperature. Since natural, safe, and healthy foods with longer shelf-life are increasingly demanded, these requests are challenging to fulfill by using current thermal processing technologies. Thus, novel preservation technologies based on non-thermal processing methods are required. The aim of this article is to provide recent developments in maintaining seafood safety via CP, HHP, and PEF technologies, as well as their mechanisms of action regarding contamination with food-borne microorganisms. Their application to control parasites, spores and the possibility to eradicate the hazard of SARS-CoV-2 transmission through seafood products are also discussed. CP, HHP, and PEF have been applied to inactivate food-borne microorganisms in the seafood industry. However, the drawbacks for each emerging technology have also been reported. To ensure safety and maintain quality of seafood products, the combination of these processing techniques with natural antimicrobial agents or existing thermal methods may be more applicable in the case of the seafood industry. Further studies are required to examine the effects of these methods on viruses, parasites, and SARS-CoV-2 in seafood.


Assuntos
Gases em Plasma , Vírus , Manipulação de Alimentos/métodos , Pressão Hidrostática , Conservação de Alimentos/métodos , Alimentos Marinhos
4.
J Sci Food Agric ; 103(12): 5938-5948, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37186089

RESUMO

BACKGROUND: Ultrasound is widely used as a novel non-thermal processing technique to improve protein properties. In recent decades, applying ultrasound-assisted emulsification (UAE) to produce protein-stabilized emulsion has attracted people's attention. Instead of applying ultrasound to treat a single protein solution, UAE treatment refers to the use of sonication to a mixture of protein and oil. The purpose of this study was to compare the different effects of ultrasound treatment on the properties of myofibrillar protein (MP) in the presence or absence of soybean oil. A suitable sonication power was selected based on the change in emulsion properties. RESULTS: 300 W sonication power was selected because of its most effectively decreased emulsion droplet size and increased absolute zeta potential. Sonication more significantly increased the protein carbonyl content and disulfide bonds of the MP-soybean oil sample compared with the MP sample. Due to the presence of oil, ultrasound could unfold more protein molecules, illustrated by a lower α-helix content and intrinsic fluorescence intensity, and a higher surface hydrophobicity. Results of liquid chromatography-tandem mass spectrometry illustrated that sonication enhanced the myosin heavy chain and actin content at the soybean oil interface as well as accelerated the myosin light chain to separate from myosin in the MP-soybean oil system. CONCLUSION: Ultrasound treatment could lead to a higher level of protein oxidation and greater protein molecule exposure in the MP in the presence of oil system than in the oil-free MP system. © 2023 Society of Chemical Industry.


Assuntos
Óleo de Soja , Humanos , Óleo de Soja/química , Emulsões/química , Carbonilação Proteica , Oxirredução , Interações Hidrofóbicas e Hidrofílicas
5.
Compr Rev Food Sci Food Saf ; 22(5): 4004-4029, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37350045

RESUMO

With consumers gaining prominent awareness of health and well-being, a diverse range of fortified or reformulated novel food is developed to achieve personalized or tailored nutrition using protein, carbohydrates, or fat as building blocks. Flavor property is a critical factor in the acceptability and marketability of fortified or reformulated food. Major food ingredients are able to interact with flavor compounds, leading to a significant change in flavor release from the food matrix and, ultimately, altering flavor perception. Although many efforts have been made to elucidate how food matrix components change flavor binding capacities, the influences on flavor perception and their implications for the innovation of fortified or reformulated novel food have not been systematically summarized up to now. Thus, this review provides detailed knowledge about the binding behaviors of flavors to major food ingredients, as well as their influences on flavor retention, release, and perception. Practical approaches for manipulating these interactions and the resulting flavor quality are also reviewed, from the scope of their intrinsic and extrinsic influencing factors with technologies available, which is helpful for future food innovation. Evaluation of food-ingredient interactions using real food matrices while considering multisensory flavor perception is also prospected, to well motivate food industries to investigate new strategies for tasteful and healthy food design in response to consumers' unwillingness to compromise on flavor for health.


Assuntos
Ingredientes de Alimentos , Paladar , Alimentos , Percepção Gustatória , Preferências Alimentares
6.
Crit Rev Food Sci Nutr ; : 1-17, 2022 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-36218375

RESUMO

The dynamic and complex peculiarities of the oral environment present several challenges for controlling the aroma release during food consumption. They also pose higher requirements for designing food with better sensory quality. This requires a comprehensive understanding of the basic rules of aroma transmission and aroma perception during food oral processing and its behind mechanism. This review summarized the latest developments in aroma release from food to retronasal cavity, aroma release and delivery influencing factors, aroma perception mechanisms. The individual variance is the most important factor affecting aroma release and perception. Therefore, the intelligent chewing simulator is the key to establish a standard analytical method. The key odorants perceived from the retronasal cavity should be given more attention during food oral processing. Identification of the olfactory receptor activated by specific odorants and its binding mechanisms are still the bottleneck. Electrophysiology and image technology are the new noninvasive technologies in elucidating the brain signals among multisensory, which can fill the gap between aroma perception and other senses. Moreover, it is necessary to develop a new approach to integrate the relationship among aroma binding parameters, aroma concentration, aroma attributes and cross-modal reactions to make the aroma prediction model more accurate.

7.
BMC Microbiol ; 21(1): 182, 2021 06 15.
Artigo em Inglês | MEDLINE | ID: mdl-34130624

RESUMO

BACKGROUND: Excessive reactive oxygen species (ROS) can cause serious damage to the human body and may cause various chronic diseases. Studies have found that lactic acid bacteria (LAB) have antioxidant and anti-aging effects, and are important resources for the development of microbial antioxidants. This paper was to explore the potential role of an antioxidant strain, Lactobacillus plantarum NJAU-01 screened from traditional dry-cured meat product Jinhua Ham in regulating D-galactose-induced subacute senescence of mice. A total of 48 specific pathogen free Kun Ming mice (SPF KM mice) were randomly allocated into 6 groups: control group with sterile saline injection, aging group with subcutaneously injection of D-galactose, treatments groups with injection of D-galactose and intragastric administration of 107, 108, and 109 CFU/mL L. plantarum NJAU-01, and positive control group with injection of D-galactose and intragastric administration of 1 mg/mL Vitamin C. RESULTS: The results showed that the treatment group of L. plantarum NJAU-01 at 109 CFU/mL showed higher total antioxidant capacity (T-AOC) and the antioxidant enzymatic activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) than those of the other groups in serum, heart and liver. In contrast, the content of the oxidative stress marker malondialdehyde (MDA) showed lower levels than the other groups (P < 0.05). The antioxidant capacity was improved with the supplement of the increasing concentration of L. plantarum NJAU-01. CONCLUSIONS: Thus, this study demonstrates that L. plantarum NJAU-01 can alleviate oxidative stress by increasing the activities of enzymes involved in oxidation resistance and decreasing level of lipid oxidation in mice.


Assuntos
Envelhecimento/efeitos dos fármacos , Envelhecimento/metabolismo , Antioxidantes/metabolismo , Lactobacillus plantarum/fisiologia , Probióticos/administração & dosagem , Animais , Catalase/metabolismo , Glutationa Peroxidase/metabolismo , Humanos , Malondialdeído/metabolismo , Camundongos , Estresse Oxidativo/efeitos dos fármacos , Superóxido Dismutase/metabolismo
8.
Crit Rev Food Sci Nutr ; 61(11): 1914-1933, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32449370

RESUMO

In the field of agricultural and food processing, high power ultrasound (HPUS) is recognized as a green, physical and non-thermal technology in improving the safety and quality of foods. The functional properties of food proteins are responsible for texture, yield and organoleptic of food products which are the theoretical basis for food processing optimizing. HPUS treatment could provide the possibility for creating novel functional properties of new foods with desirable properties due to the modification of protein structure. In this article, an overview of the previous studies and recent progress of the relationship between structure modification and functional properties of food proteins using the HPUS technique were presented. The research results revealed that HPUS could significantly affect the conformation and structure of protein due to the cavitation effect resulting in the improvement of solubility, interfacial, viscosity, gelation and flavor binding properties of proteins. During meat processing, HPUS can modify the structure and thereby improve the functional properties of myofibrillar protein (MP), leading to the quality enhancement, low fat and/or salt products development and the shelf life extending. In view of this review, the recent findings of applications of HPUS in the production of meat products based on the modification of MP including curing, freezing/thawing and thermal processing have been summarized. Finally, the future considerations were presented in order to facilitate the progress of HPUS in meat industry and provided the suggestions based on the advanced protein modification by HPUS for the commercial utilization of HPUS in producing the innovative meat products.


Assuntos
Produtos da Carne , Carne , Manipulação de Alimentos , Congelamento , Produtos da Carne/análise , Solubilidade
9.
J Sci Food Agric ; 99(1): 429-435, 2019 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-29896775

RESUMO

BACKGROUND: Boiled Wuding chicken was produced using whole chicken by washing, boiling 1 h with salt, deep frying, and boiling 2 h. The effect of the process on the water-soluble low molecular weight (WLOM) compound profiles of products was characterized using proton nuclear magnetic resonance spectroscopy, and the fatty acid composition of products was analyzed using gas chromatography-mass spectrometry. RESULTS: The metabolome was dominated by 49 WLOM compounds, and 22 fatty acid compounds were detected. Principal component (PC)1 and PC2 explained a total of 93.4% and 3% of variance respectively. Compared with the control group, the total WLOM compound and fatty acid contents of the chicken breast were significantly decreased in the other three processing stages (P < 0.05). Comprehensive multivariate data analysis showed significant differences about precursor substance between the different processing including creatine, lactate, creatinine, glucose, taurine, anserine, and acetate (P < 0.05). CONCLUSION: These results contribute to a more accurate understanding of precursor substance changes of flavor in chicken meat during processing. Boiled, treated chicken had significant effects on fatty acid and WLOM compounds. © 2018 Society of Chemical Industry.


Assuntos
Ácidos Graxos/química , Aromatizantes/química , Carne/análise , Animais , Galinhas , Culinária , Cromatografia Gasosa-Espectrometria de Massas , Espectroscopia de Ressonância Magnética , Peso Molecular
10.
J Sci Food Agric ; 97(13): 4508-4514, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28304086

RESUMO

BACKGROUND: Protein oxidation is widespread in biochemical systems. The objective of the study was to investigate the differences in protein oxidation, µ-calpain activity, desmin proteolysis and protein solubility of beef psoas major (PM) and semi-membranosus (SM) muscles under three packaging systems during postmortem ageing. At 24 h postmortem, beef muscles were packaged respectively in air-permeable film overwrap (AP), vacuum pack (VP) or modified atmosphere (MAP, 80% O2 + 20% CO2 ), and then displayed for 10 days at 4 °C. RESULTS: Carbonyl group values and thiol group content were significantly influenced by packaging type and storage time. The SM muscles from AP and MAP showed greater µ-calpain activity compared to VP. Desmin of PM and SM from AP and MAP samples showed decreased proteolysis compared with VP. CONCLUSION: The results suggested that the inhibition of µ-calpain activity of beef samples from AP and MAP could be closely associated with protein oxidation which further lowered the level of desmin degradation compared to VP. © 2017 Society of Chemical Industry.


Assuntos
Calpaína/química , Desmina/química , Embalagem de Alimentos/métodos , Músculo Esquelético/química , Animais , Calpaína/metabolismo , Bovinos , Desmina/metabolismo , Embalagem de Alimentos/instrumentação , Carne/análise , Proteínas Musculares/química , Proteínas Musculares/metabolismo , Músculo Esquelético/enzimologia , Músculo Esquelético/metabolismo , Oxirredução , Mudanças Depois da Morte , Proteólise
11.
J Sci Food Agric ; 96(1): 99-108, 2016 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-25546564

RESUMO

BACKGROUND: The objective of this study was to purify and identify antioxidant peptides present in the extract of Chinese dry-cured Jinhua ham. Jinhua ham extracts were separated into five fractions (A-E) by size-exclusion chromatography. Each fraction was subjected to a simulated gastrointestinal (GI) digestion system and fractions showing strong antioxidant activities were collected and subjected to liquid chromatography combined with tandem mass spectrometry (LC/MS/MS) for further purification and identification. RESULTS: Using MS/MS analysis, 33 peptides were identified in these fractions. Several key peptides were selected for synthesis and their antioxidant activity determined. The peptide showing strongest DPPH radical scavenging activity was GKFNV, which showed 92.7% antioxidant activity at a concentration of 1 mg mL(-1); the peptide LPGGGHGDL showed the highest hydroxyl radical scavenging activity; and LPGGGT and HA showed strong inhibition activity against erythrocyte hemolysis (about 45%) before digestion. On the other hand, KEER may contribute to Fe(2+) chelating ability in fraction C after GI digestion. CONCLUSION: Jinhua dry-cured ham seems to be a potential source of antioxidant peptides generated in the products and in GI digestion.


Assuntos
Antioxidantes/farmacologia , Trato Gastrointestinal/metabolismo , Produtos da Carne , Peptídeos/farmacologia , Animais , Antioxidantes/análise , Compostos de Bifenilo/metabolismo , Quelantes/análise , Quelantes/farmacologia , Digestão , Manipulação de Alimentos/métodos , Hemólise/efeitos dos fármacos , Humanos , Peptídeos/análise , Picratos/metabolismo , Suínos
12.
BMC Genomics ; 16: 177, 2015 Mar 13.
Artigo em Inglês | MEDLINE | ID: mdl-25887672

RESUMO

BACKGROUND: This study aimed to identify markers for muscle growth rate and the different cellular contributors to cattle muscle and to link the muscle growth rate markers to specific cell types. RESULTS: The expression of two groups of genes in the longissimus muscle (LM) of 48 Brahman steers of similar age, significantly enriched for "cell cycle" and "ECM (extracellular matrix) organization" Gene Ontology (GO) terms was correlated with average daily gain/kg liveweight (ADG/kg) of the animals. However, expression of the same genes was only partly related to growth rate across a time course of postnatal LM development in two cattle genotypes, Piedmontese x Hereford (high muscling) and Wagyu x Hereford (high marbling). The deposition of intramuscular fat (IMF) altered the relationship between the expression of these genes and growth rate. K-means clustering across the development time course with a large set of genes (5,596) with similar expression profiles to the ECM genes was undertaken. The locations in the clusters of published markers of different cell types in muscle were identified and used to link clusters of genes to the cell type most likely to be expressing them. Overall correspondence between published cell type expression of markers and predicted major cell types of expression in cattle LM was high. However, some exceptions were identified: expression of SOX8 previously attributed to muscle satellite cells was correlated with angiogenesis. Analysis of the clusters and cell types suggested that the "cell cycle" and "ECM" signals were from the fibro/adipogenic lineage. Significant contributions to these signals from the muscle satellite cells, angiogenic cells and adipocytes themselves were not as strongly supported. Based on the clusters and cell type markers, sets of five genes predicted to be representative of fibro/adipogenic precursors (FAPs) and endothelial cells, and/or ECM remodelling and angiogenesis were identified. CONCLUSIONS: Gene sets and gene markers for the analysis of many of the major processes/cell populations contributing to muscle composition and growth have been proposed, enabling a consistent interpretation of gene expression datasets from cattle LM. The same gene sets are likely to be applicable in other cattle muscles and in other species.


Assuntos
Perfilação da Expressão Gênica , Músculo Esquelético/crescimento & desenvolvimento , Músculo Esquelético/metabolismo , Transcriptoma , Adipogenia/genética , Animais , Biomarcadores , Bovinos , Ciclo Celular/genética , Análise por Conglomerados , Biologia Computacional/métodos , Matriz Extracelular , Expressão Gênica , Regulação da Expressão Gênica , Modelos Biológicos , Anotação de Sequência Molecular , Característica Quantitativa Herdável , Células Satélites de Músculo Esquelético/metabolismo
13.
J Sci Food Agric ; 95(14): 2832-7, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25428271

RESUMO

BACKGROUND: Plant proteins and polysaccharides are often utilised in ground meat products as meat binders, gelling agents, texture stabilisers or fat substitutes. The aim of this study was to investigate the effects of the incorporation of 57 g kg(-1) soy protein isolate (SPI), 7 g kg(-1) carrageenan (CAR) and SPI/CAR mixture on the quality of ground pork patties. RESULTS: Ground pork patties with individual SPI and CAR or SPI/CAR mixture showed either retained or improved emulsion stability, physicochemical properties and dynamic rheology compared with control samples. Although there were no significant colour differences among treatments, samples with SPI/CAR mixture presented higher texture profile values for hardness and chewiness compared with other treatments (P < 0.05). Patties with additives showed significantly lower cooking loss and better thermal emulsion stability than control samples owing to a lower release rate of water and fat (P < 0.05). Compared with control samples or those with individual SPI and CAR, patties with SPI/CAR mixture formed a smoother and more continuous structure with a more compact protein matrix. CONCLUSION: The results indicate that a mixture of SPI and CAR can be effectively used as a functional ingredient to improve the quality of ground pork patties.


Assuntos
Carragenina , Emulsões/química , Aditivos Alimentares , Manipulação de Alimentos , Produtos da Carne/análise , Carne Vermelha , Proteínas de Soja , Animais , Cor , Culinária , Humanos , Reologia , Suínos , Temperatura
14.
Food Sci Biotechnol ; 33(10): 2289-2299, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39145128

RESUMO

This study aimed to reveal the impact of bacterial dynamics on the quality and biogenic amine (BA) accumulation of dry-cured Chinese bacon (Larou). Physicochemical parameters, free amino acids, BAs, amino acid decarboxylase, and microbial profiles were determined, and their relationships were explored during Larou ripening and storage. The results showed that moisture and sodium nitrite decreased significantly during the Larou ripening stage (p < 0.05), while pH, NaCl, TBARS, and total volatile basic nitrogen considerably increased (p < 0.05). BAs were mainly formed during the stages of dry-ripening and storage of Larou and may present a risk of tyramine and phenylethylamine poisoning. Firmicutes and Actinobacteriota were the predominant phyla, and the dominant genera were Staphylococcus, Corynebacterium and Lactococcus. Correlation analysis showed Corynebacterium, Brevibacterium, Lactobacillus, Tetragenococcus and Staphylococci spp. played a crucial role in determining the quality and safety of Larou. Supplementary Information: The online version contains supplementary material available at 10.1007/s10068-023-01472-1.

15.
Ultrason Sonochem ; 110: 107059, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39250863

RESUMO

The aim of the present study was to evaluate the effects of ultrasound-assisted intermittent tumbling (UT) at 300 W, 20 kHz and 40 min on the conformation, intermolecular interactions and aggregation of myofibrillar proteins (MPs) and its induced gelation properties at various tumbling times (4 and 6 h). Raman results showed that all tumbling treatments led the helical structure of MPs to unfold. In comparison to the single intermittent tumbling treatment (ST), UT treatment exerted more pronounced effects on strengthening the intermolecular hydrogen bonds and facilitating the formation of an ordered ß-sheet structure. When the tumbling time was the same, UT treatment caused higher surface hydrophobicity, fluorescence intensity and disulfide bond content in the MPs, inducing the occurrence of hydrophobic interaction and disulfide cross-linking between MPs molecules, thus forming the MPs aggregates. Additionally, results from the solubility, particle size, atomic force microscopy and SDS-PAGE further indicated that, relative to the ST treatment, UT treatment was more potent in promoting the polymerization of myosin heavy chain. The MPs aggregates in the UT group were more uniform than those in the ST group. During the gelation process, the pre-formed MPs aggregates in the UT treatment increased the thermal stability of myosin, rendering it more resistant to heat-induced unfolding of the myosin rod region. Furthermore, they improved the protein tail-tail interaction, resulting in the formation of a well-structured gel network with higher gel strength and cooking yield compared to the ST treatment.


Assuntos
Géis , Miofibrilas , Reologia , Géis/química , Miofibrilas/química , Ondas Ultrassônicas , Proteínas Musculares/química , Conformação Proteica , Interações Hidrofóbicas e Hidrofílicas , Animais , Agregados Proteicos
16.
J Agric Food Chem ; 72(25): 14433-14447, 2024 Jun 26.
Artigo em Inglês | MEDLINE | ID: mdl-38866717

RESUMO

JHBp2 is a peptide purified from Jinhua ham broth with antibacterial activity against Salmonella typhimurium. Untargeted metabolomics and label-free quantitative proteomics were used to analyze metabolic and protein expression changes in S. typhimurium after JHBp2 treatment. Cell wall and membrane damage results indicate that JHBp2 has membrane-disruptive properties, causing leakage of intracellular nucleic acids and proteins. Metabolomics revealed 516 differentially expressed metabolites, involving cofactor biosynthesis, purine metabolism, ABC transporters, glutathione metabolism, pyrimidine metabolism, etc. Proteomics detected 735 differentially expressed proteins, involving pyruvate metabolism, amino acid biosynthesis, purine metabolism, carbon metabolism, glycolysis/gluconeogenesis, etc. RT-qPCR and proteomics results showed a positive correlation, and molecular docking demonstrated stable binding of JHBp2 to some differentially expressed proteins. In summary, JHBp2 could disrupt the S. typhimurium cell wall and membrane structure, interfere with synthesis of membrane-related proteins, trigger intracellular substance leak, and reduce levels of enzymes and metabolites involved in energy metabolism, amino acid anabolism, and nucleotide anabolism.


Assuntos
Antibacterianos , Proteínas de Bactérias , Metabolômica , Simulação de Acoplamento Molecular , Proteômica , Salmonella typhimurium , Salmonella typhimurium/efeitos dos fármacos , Salmonella typhimurium/genética , Proteínas de Bactérias/metabolismo , Proteínas de Bactérias/genética , Proteínas de Bactérias/química , Suínos , Animais , Antibacterianos/farmacologia , Antibacterianos/química , Peptídeos/química , Peptídeos/farmacologia , Peptídeos/metabolismo , Produtos da Carne/microbiologia , Produtos da Carne/análise
17.
J Agric Food Chem ; 2024 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-39295075

RESUMO

This study aimed to explore the effects of S-nitrosylation on caspase-3 modification and its subsequent effects on beef myofibril degradation in vitro. Recombinant caspase-3 was reacted with different concentrations of S-nitrosoglutathione (GSNO, nitric oxide donor) at 37 °C for 30 min and subsequently incubated with purified myofibrillar protein from bovine semimembranosus muscle. Results indicated that the activity of caspase-3 was significantly reduced after GSNO treatments (P < 0.05) and showed a dose-dependent inhibitory effect, which was attributed to the increased S-nitrosylation extent of caspase-3. LC-MS/MS analysis revealed that caspase-3 was S-nitrosylated at cysteine sites 116, 170, 184, 220, and 264. Moreover, the degradation of desmin and troponin-T was notably suppressed by S-nitrosylated caspase-3 (P < 0.05). To conclude, protein S-nitrosylation could modify the cysteine residues of caspase-3, which accounts for the reduced caspase-3 activity and further represses its proteolytic ability on beef myofibrillar protein.

18.
Ultrason Sonochem ; 108: 106979, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38972094

RESUMO

To investigate the effect of ultrasound treatment on the flavor profile of beef during postmortem aging, a comprehensive analysis of beef flavor was conducted at 0, 7, and 12 d of aging using sensory evaluation and electronic nose. Furthermore, the key volatile flavor compounds were identified using gas chromatography-mass spectrometry (GC-MS), and the odor activity value (OAV) was further evaluated. In addition, the primary pathway involved in flavor formation during beef aging after ultrasound treatment was explored. The results indicated that ultrasound enhanced the flavor profile of beef during postmortem aging by modifying the OAV of hexanal, heptanal, octanal, nonanal, decanal, (Z)-2-nonenal, dodecanal, pentanal, 1-octen-3-ol, octanoic acid, and 2-pentylfuran. Lipid oxidation was a crucial pathway through which ultrasound promoted the generation of volatile flavor compounds in beef, confirmed by the improved oxidation level of fatty acids, particularly monounsaturated ones. The study indicates that ultrasound technology can be regarded as an effective method for enhancing the beef flavor profile during postmortem aging.


Assuntos
Carne Vermelha , Paladar , Animais , Bovinos , Carne Vermelha/análise , Odorantes/análise , Compostos Orgânicos Voláteis/análise , Ondas Ultrassônicas , Fatores de Tempo , Cromatografia Gasosa-Espectrometria de Massas
19.
Meat Sci ; 216: 109580, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38941777

RESUMO

This study aimed to quantitively profile the S-nitrosylation in beef semimembranosus (SM) with different treatments (nitric oxide donor or nitric oxide synthase inhibitor) by applying iodoTMT-based nitrosoproteomics. Results showed that 2096 S-nitrosylated cysteine sites in 368 proteins were detected in beef SM. Besides, differential SNO-modified proteins were screened, some of which were involved in crucial biochemical pathways, including calcium-releasing-related proteins, energy metabolic enzymes, myofibrils, and cytoskeletal proteins. GO analysis indicated that differential proteins were localized in a wide range of cellular compartments, such as cytoplasm, organelle, and mitochondrion, providing a prerequisite for S-nitrosylation exerting broad roles in post-mortem muscles. Furthermore, KEGG analysis validated that these proteins participated in the regulation of diverse post-mortem metabolic processes, especially glycolysis. To conclude, changes of S-nitrosylation levels in post-mortem muscles could impact the structure and function of crucial muscle proteins, which lead to different levels of muscle metabolism and ultimately affect beef quality.


Assuntos
Proteínas Musculares , Músculo Esquelético , Proteômica , Carne Vermelha , Bovinos , Animais , Carne Vermelha/análise , Músculo Esquelético/química , Músculo Esquelético/metabolismo , Proteínas Musculares/metabolismo , Cisteína/metabolismo , Óxido Nítrico/metabolismo , Doadores de Óxido Nítrico/farmacologia
20.
J Agric Food Chem ; 72(4): 2178-2192, 2024 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-38259150

RESUMO

In our previous study, yeast-derived peptide Tyr-Pro-Leu-Pro (YPLP) was found to prolong treadmill time and relieve muscle fatigue in ICR mice. The present study aimed to further investigate the antifatigue mechanism of YPLP. Three doses of YPLP (10, 25, and 50 mg/kg·d) were given to exercise mice for 4 weeks. Results showed that YPLP reduced the oxidative response via the nuclear factor erythroid-2-related factor 2 (Nrf2) pathway and promoted energy metabolism through the AMP-activated protein kinase (AMPK) pathway. Label-free proteomics results showed that 81 differential abundance proteins (DAPs) were regulated by high-dose YPLP. These DAPs belonged to proteasome, mitochondrial, and muscle proteins. YPLP was mainly involved in proteasome, aminoacyl-tRNA biosynthesis, focal adhesion, and MAPK signal pathways to enhance muscle endurance. Furthermore, real-time quantitative PCR and Western blotting results proved that YPLP upregulated Psmd14 expression and downregulated p38 MAPK expression. Overall, this study revealed the mechanism behind YPLP to alleviate exercise fatigue.


Assuntos
Dipeptídeos , Complexo de Endopeptidases do Proteassoma , Proteômica , Animais , Camundongos , Complexo de Endopeptidases do Proteassoma/genética , Camundongos Endogâmicos ICR , Proteínas Quinases Ativadas por AMP/genética , Proteínas Quinases Ativadas por AMP/metabolismo
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