AMB Express最新文献_第3页

Nano selenium in broiler feeding: physiological roles and nutritional effects. 肉鸡饲养中的纳米硒：生理作用和营养影响。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-11-04 DOI: 10.1186/s13568-024-01777-2

Babak Hosseintabar-Ghasemabad, Olga Vilorievna Kvan, Elena Vladimirovna Sheida, Artem Vladimirovich Bykov, František Zigo, Alireza Seidavi, Mona Mohamed Mohamed Yasseen Elghandour, Moises Cipriano-Salazar, Maximilian Lackner, Abdelfattah Zeidan Mohamed Salem

{"title":"Nano selenium in broiler feeding: physiological roles and nutritional effects.","authors":"Babak Hosseintabar-Ghasemabad, Olga Vilorievna Kvan, Elena Vladimirovna Sheida, Artem Vladimirovich Bykov, František Zigo, Alireza Seidavi, Mona Mohamed Mohamed Yasseen Elghandour, Moises Cipriano-Salazar, Maximilian Lackner, Abdelfattah Zeidan Mohamed Salem","doi":"10.1186/s13568-024-01777-2","DOIUrl":"10.1186/s13568-024-01777-2","url":null,"abstract":"Using nanotechnology, while improving the health of broiler chickens, it is possible to control and reduce the conflict of minerals in the intestines, and toxicity of and pollution by these elements. It could be shown that the antioxidant and immune modulation effects of nano selenium are significantly superior compared to other sources of selenium. In addition, improving the quality of meat products with the use of nano selenium has promising results in the future perspective of quality improvement and food safety. Nutrition of permitted and optimal levels is very important in the consumption of nano selenium form and as it can have significant beneficial functional and health effects, in case of errors in the selected levels and doses, irreparable side effects and adverse results can occur. In this review report, an attempt has been made to introduce the position and importance of selenium and the approach of smart consumption of its nano form in the nutrition of broiler chickens. The novelty of using nanotechnology in feeding broiler chickens can be a unique opportunity to improve the bioavailability of important and rare elements such as selenium.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"117"},"PeriodicalIF":3.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11535084/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142567081","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

In vitro antibacterial activity of photoactivated flavonoid glycosides against Acinetobacter baumannii. 光活化黄酮苷对鲍曼不动杆菌的体外抗菌活性。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-11-04 DOI: 10.1186/s13568-024-01781-6

Maryam Pourhajibagher, Zahra Javanmard, Abbas Bahador

{"title":"In vitro antibacterial activity of photoactivated flavonoid glycosides against Acinetobacter baumannii.","authors":"Maryam Pourhajibagher, Zahra Javanmard, Abbas Bahador","doi":"10.1186/s13568-024-01781-6","DOIUrl":"10.1186/s13568-024-01781-6","url":null,"abstract":"Acinetobacter baumannii's extensive antibiotic resistance makes its infections difficult to treat, so effective strategies to fight this bacterium are urgently needed. This study aims to evaluate the effectiveness of antimicrobial photodynamic therapy (aPDT) mediated by Rutin-Gal(III) complex and Quercetin against A. baumannii. Absorbance spectra, fluorescence spectra, and minimum inhibitory concentration (MIC) of Rutin-Gal(III) complex and Quercetin were determined. The intracellular reactive oxygen species (ROS), extracellular polymeric substances (EPS), cell membrane permeability, expression of ompA and blaOXA-23, anti-biofilm activity, and anti-metabolic activity of Rutin-Gal(III) complex- and Quercetin-mediated aPDT were measured. Rutin-Gal(III) complex and Quercetin revealed absorption peaks in the visible spectra. Quercetin and Rutin-Gal(III) complex displayed fluorescence peaks at 524 nm and 540 nm, respectively. MIC values for the Rutin-Gal(III) complex and Quercetin were 64 µg/mL and 256 µg/mL, respectively. Quercetin- and Rutin-Gal(III) complex-mediated aPDT significantly reduced the colony forming units/mL (58.4% and 67.5%), EPS synthesis (47.4% and 56.5%), metabolic activity (30.5% and 36.3%), ompA (5.5- and 10.5-fold), and blaOXA-23 (4.1-fold and 7.8-fold) genes expression (respectively; all P < 0.05). Quercetin- and Rutin-Gal(III) complex-mediated aPDT enhanced notable biofilm degradation (36.2% and 40.6%), ROS production (2.55- and 2.90-folds), and membrane permeability (10.8- and 9.6-folds) (respectively; all P < 0.05). The findings indicate that Rutin-Gal(III) complex- and Quercetin-mediated aPDT exhibits antibacterial properties and could serve as a valuable adjunctive strategy to conventional antibiotic treatments for A. baumannii infections. One limitation of this study is that it was conducted solely on the standard strain; testing on clinical isolates would allow for more reliable interpretation of the results.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"119"},"PeriodicalIF":3.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11535136/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142567129","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

Crotalaria madurensis flavonol glycosides' antibacterial activity against Staphylococcus aureus. Crotalaria madurensis 黄酮醇苷对金黄色葡萄球菌的抗菌活性。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-11-04 DOI: 10.1186/s13568-024-01776-3

Hala Sh Mohammed, Salwa A Abu El Wafa, Mona H Ibrahim, Rasha Mohammad Fathy, Noha A Seif-Eldein

{"title":"Crotalaria madurensis flavonol glycosides' antibacterial activity against Staphylococcus aureus.","authors":"Hala Sh Mohammed, Salwa A Abu El Wafa, Mona H Ibrahim, Rasha Mohammad Fathy, Noha A Seif-Eldein","doi":"10.1186/s13568-024-01776-3","DOIUrl":"10.1186/s13568-024-01776-3","url":null,"abstract":"Methicillin-resistant Staphylococcus aureus (MRSA) infections are prevalent in hospitals and often lead to significant health complications. This study aimed to explore the chemical composition of the aerial part of Crotalaria madurensis and evaluate its antioxidant and antibacterial properties. The impact of gamma irradiation on the antibacterial properties of the plant extract and metabolite 1 against MRSA was also examined. Fourier-transform infrared (FTIR) analysis was conducted on the filtrates of untreated MRSA and MRSA treated with the plant extract and metabolite 1. Four flavonol glycosides were identified as gossypetin 8-methoxy, 3-O-β-D-xylopyranoside (metabolite 1), gossypetin 8-O-β-D-glucopyranoside (metabolite 2), kaempferol 3-O-β-D-glucpyranoside (Astragalin, metabolite 3), and herbacetin 7-methoxy-3-O-β-D-glucopyranoside (metabolite 4). All metabolites exhibited significant antioxidant properties using different assays. The antibacterial efficacy of the extract and metabolite 1, which showed substantial antioxidant properties compared to the other isolated metabolites, was evaluated. Both the plant extract and metabolite 1 significantly reduced the viability and cell count of MRSA at concentrations of 1.0 and 0.5 mg/ml. The antibacterial activity of the plant extract and metabolite 1 was assessed after gamma irradiation at 50 and 100 Gy, which did not significantly affect the antibacterial efficiency. FTIR analysis indicated that the plant extract and metabolite 1 significantly altered the band frequency values, bandwidth, and peak intensity % of the treated MRSA filtrate. Molecular docking studies suggested that metabolite 1 exhibited the highest antioxidant and anti-MRSA activity, with strong binding scores like the ligand, indicating an effective interaction and high affinity between metabolite 1 and the target molecule.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"118"},"PeriodicalIF":3.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11535145/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142567111","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

Effect of tobacco-radish rotation for different years on bacterial wilt and rhizosphere microbial communities. 不同年份烟草-萝卜轮作对细菌性枯萎病和根瘤微生物群落的影响。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-10-17 DOI: 10.1186/s13568-024-01760-x

Yuhao Dai, Jixiu Li, Zhenzhen Wang, Shaoqi Yang, Qingju Xiao, Zipeng Gao, Fengjing Zhang, Chenran Zhao, Liang Yang, Shaopeng Chen, Wei Ding

{"title":"Effect of tobacco-radish rotation for different years on bacterial wilt and rhizosphere microbial communities.","authors":"Yuhao Dai, Jixiu Li, Zhenzhen Wang, Shaoqi Yang, Qingju Xiao, Zipeng Gao, Fengjing Zhang, Chenran Zhao, Liang Yang, Shaopeng Chen, Wei Ding","doi":"10.1186/s13568-024-01760-x","DOIUrl":"https://doi.org/10.1186/s13568-024-01760-x","url":null,"abstract":"Tobacco bacterial wilt is a major limiting factor for tobacco production and development, and it is more likely to occur under perennial single cropping of tobacco. In recent years, the rotation of tobacco-radish has gradually become popular. Therefore, we studied the effects of years of tobacco-radish rotation on tobacco bacterial wilt occurrence and rhizosphere microorganisms. The results indicated that both SY and TY could significantly reduce the risk of tobacco bacterial wilt occurrence, and SY had the lowest disease index. The rotation of radish plants significantly increased the soil pH but decreased the contents of alkali-hydrolysed nitrogen and organic matter in the soil. Alkali-hydrolysed nitrogen and pH are the key factors affecting the composition of the bacterial community. Furthermore, radish rotation changed the composition of the soil microbial community, increased the diversity of the bacterial community, and significantly altered the bacterial community structure. At the genus level, the abundance of Sphingomonas species negatively correlated with Ralstonia increased significantly, while the relative abundance of Rhodanobacter species positively correlated with Ralstonia decreased significantly. Disease index, pH and available phosphorus were the main factors affecting the variation in different bacterial genera. The network analysis results showed that Ralstonia was less connected in the network than in the CK group, and the SY treatment group had a more complex bacterial network structure. Overall, 2 years of tobacco and radish rotation improved the bacterial community structure of the rhizosphere soil and alleviated the harm caused by tobacco bacterial wilt, which is highly important for the stability and health of the rhizosphere soil ecosystem.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"116"},"PeriodicalIF":3.5,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11486869/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455834","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

Impact of bariatric surgery on gut microbiota composition in obese patients compared to healthy controls. 与健康对照组相比，减肥手术对肥胖患者肠道微生物群组成的影响。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-10-14 DOI: 10.1186/s13568-024-01769-2

Nima Mohammadzadeh, Shabnam Razavi, Gholamhossein Ebrahimipour

{"title":"Impact of bariatric surgery on gut microbiota composition in obese patients compared to healthy controls.","authors":"Nima Mohammadzadeh, Shabnam Razavi, Gholamhossein Ebrahimipour","doi":"10.1186/s13568-024-01769-2","DOIUrl":"https://doi.org/10.1186/s13568-024-01769-2","url":null,"abstract":"Bariatric surgery is vital for sustainable weight loss and metabolic improvement in obese individuals, but its effects on gut microbiota and their role in these benefits require further investigation. Investigate the temporal changes in gut microbiota in obese patients undergoing bariatric surgery (gastric sleeve gastrectomy or Roux-en-Y Gastric Bypass (RYGB)) compared to healthy controls, aiming to understand their role in weight loss and metabolic health improvement. A case-control study included 30 obese patients aged 65-95 undergoing bariatric surgery, and 18 matched healthy controls. Selection criteria were based on age, race, BMI, history of antibiotics, probiotics, and prebiotics usage. Stool samples were collected at baseline, three months, and six months post-surgery for DNA extraction and quantitative real-time PCR analysis to assess gut microbiota changes. Physical activity and dietary intake were evaluated using standardized questionnaires. Statistical analyses were performed using R. Post-surgery, patients showed significant reductions in weight and BMI, with changes in dietary habits and physical activity. Quantitative real-time PCR analysis revealed substantial alterations in bacterial groups such as Bacteroides and Fusobacterium. However, some groups showed no significant changes, indicating a complex interaction between gut microbiota and bariatric surgery. Notable correlations were found between body weight, BMI, and specific bacterial groups like the C. cluster IV and Lactobacillus, particularly in RYGB patients. Bariatric surgery significantly alters gut microbiota, aiding weight loss and metabolic regulation in obese patients. Understanding these changes is crucial for developing effective obesity management strategies, requiring further research to optimize outcomes.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"115"},"PeriodicalIF":3.5,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11473458/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455835","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

Functional properties and safety traits of L. rhamnosus and L. reuteri postbiotic extracts. 鼠李糖和罗伊氏乳杆菌益生菌提取物的功能特性和安全性特征。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-10-09 DOI: 10.1186/s13568-024-01768-3

Safura Jalali, Naheed Mojgani, Mohammad Reza Sanjabi, Solmaz Saremnezhad, Setareh Haghighat

{"title":"Functional properties and safety traits of L. rhamnosus and L. reuteri postbiotic extracts.","authors":"Safura Jalali, Naheed Mojgani, Mohammad Reza Sanjabi, Solmaz Saremnezhad, Setareh Haghighat","doi":"10.1186/s13568-024-01768-3","DOIUrl":"10.1186/s13568-024-01768-3","url":null,"abstract":"Postbiotics are the non-viable bacterial products or the low molecular weight metabolites produced by probiotics that have received considerable attention owing to their health promoting effects. The present study aimed to investigate the safety and antibacterial properties of postbiotic components of Lacticaseibacillus rhamnosus (Lra) and Limosilactobacillus reuteri (Lre) for their potential applications in food products. The freeze dried postbiotic metabolites (FD-P) from Lra and Lre were extensively analyzed for their physico-chemical properties and antibacterial actions against common food borne pathogens. Higher levels of total flavonoids (1971.79 ± 20 mg Qu/ g), total short-chain fatty acid (23 µg/g), sugar contents, CAT, and SOD anti-oxidative enzymes were detected in the Lra postbiotic, while GSH-px levels and riboflavin were higher in Lre postbiotics (P < 0.01). No significant differences were recorded in the total phenolic (2501 and 2518 mg GAE/ L) and crude protein contents (305. 58 and 296.23 µg/g) of the postbiotics (p ≥ 0.05), respectively. Both FD-P samples showed enhanced activities against Gram-Positive pathogens compared to Gram-Negative pathogens (p < 0.05), while combining the two postbiotics further potentiated the antibacterial actions. Both FD-P samples were non-hemolytic to human erythrocyte cells, and exhibited low cytotoxicity in MRC 5 and IPEC-J2 cell lines at the highest used concentrations (150 mg/ml). In summary, the postbiotics derived from Lra and Lre are safe bioactive ingredients with enhanced antibacterial and antioxidant capabilities, having potential applications as a natural preservatives in food system, potentially enhancing safety and extending the shelf life of food products.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"114"},"PeriodicalIF":3.5,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11465093/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142387255","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

Expression of thermostable MMLV reverse transcriptase in Escherichia coli by directed mutation. 通过定向突变在大肠杆菌中表达恒温 MMLV 逆转录酶。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-10-03 DOI: 10.1186/s13568-024-01773-6

Marzieh Divbandi, Ahad Yamchi, Hadi Razavi Nikoo, Abdolvahab Moradi, Alijan Tabarraei

{"title":"Expression of thermostable MMLV reverse transcriptase in Escherichia coli by directed mutation.","authors":"Marzieh Divbandi, Ahad Yamchi, Hadi Razavi Nikoo, Abdolvahab Moradi, Alijan Tabarraei","doi":"10.1186/s13568-024-01773-6","DOIUrl":"10.1186/s13568-024-01773-6","url":null,"abstract":"The functionality of Moloney murine leukemia virus reverse transcriptase (MMLV RT) will increase with the improvement of its solubility and thermal stability. Introduce directed mutation at specific positions of the MMLV RT sequence and codon optimization is needed to achieve these properties. The two RT coding sequences with (rRT-K) and without directed mutations (rRT-L) were versatility optimized and expressed to analyze the ribonuclease H (RNase H) inactivity and thermostable polymerase activity. For this purpose, the five-point mutations (438-442aa) and three-point mutations (530, 568, and 659 aa) were done at the RT connection domain and RNase H active site, respectively. High expression levels of rRT-L and rRT-K were obtained in E. coli BL21(DE3) and BL21(shuffle) strains, 0.5 mM IPTG concentration at 37 °C, and 8 hours' post-induction condition. Then, recombinant enzymes were purified and verified by Ni-NTA resin and western blotting. Insilico analysis (IUpred 3.0) showed that the directed mutation in the RNase H domain caused the formation of disorder regions or instability in the RNase H domain of rRT-K compared to rRT-L. The modified RT-PCR and the RT-LAMP reactions proved the RNase H inactivity of rRT-K. In addition, increasing of thermostability of rRT-K compared to rRT-L and commercial RT was evaluated by the RT-PCR and RT-LAMP reactions. The results showed that rRT-K could successfully tolerate 60 ºC in the two methods. This study revealed that the directed mutations and the versatile sequence optimization can promise to produce thermostable commercial enzymes to decrease non-specific one-step RT-PCR and RT-LAMP products.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"113"},"PeriodicalIF":3.5,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11450115/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142370745","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

Unlocking the potential of lactic acid bacteria mature biofilm extracts as antibiofilm agents. 发掘乳酸菌成熟生物膜提取物作为抗生物膜剂的潜力。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-10-03 DOI: 10.1186/s13568-024-01770-9

Pamela Hindieh, Joseph Yaghi, Jean Claude Assaf, Ali Chokr, Ali Atoui, Nicolas Louka, André El Khoury

{"title":"Unlocking the potential of lactic acid bacteria mature biofilm extracts as antibiofilm agents.","authors":"Pamela Hindieh, Joseph Yaghi, Jean Claude Assaf, Ali Chokr, Ali Atoui, Nicolas Louka, André El Khoury","doi":"10.1186/s13568-024-01770-9","DOIUrl":"10.1186/s13568-024-01770-9","url":null,"abstract":"The continuous growth of biofilm infections and their resilience to conventional cleaning methods and antimicrobial agents pose a worldwide challenge across diverse sectors. This persistent medical, industrial, and environmental issue contributes to treatment challenges and chronic diseases. Lactic acid bacteria have garnered global attention for their substantial antimicrobial effects against pathogens and established beneficial roles. Notably, their biofilms are also predicted to show a promising control strategy against pathogenic biofilm formation. The prevalence of biofilm-related problems underscores the need for extensive research and innovative solutions to tackle this global challenge. This novel study investigates the effect of different extracts (external, internal, and mixed extracts) obtained from Lactobacillus rhamnosus GG biofilm on pathogenic-formed biofilms. Subsequently, external extracts presented an important eradication effectiveness. Furthermore, a 6-fold concentration of these extracts led to eradication percentages of 57%, 67%, and 76% for Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa biofilms, respectively, and around 99.9% bactericidal effect of biofilm cells was observed for the three strains. The results of this research could mark a significant breakthrough in the field of anti-biofilm and antimicrobial strategies. Further studies and molecular research will be necessary to detect the molecules secreted by the biofilm, and their mechanisms of action engaged in new anti-biofilm strategies.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"112"},"PeriodicalIF":3.5,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11450114/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363969","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

Antibacterial and antioxidant properties of sumac extract on methicillin-resistant Staphylococcus aureus. 苏木萃取物对耐甲氧西林金黄色葡萄球菌的抗菌和抗氧化特性。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-10-03 DOI: 10.1186/s13568-024-01759-4

Nafiseh Farazandehnia, Farzaneh Sotoudegan, Abbas Akhavan Sepahy, Mohamad Reza Fazeli

{"title":"Antibacterial and antioxidant properties of sumac extract on methicillin-resistant Staphylococcus aureus.","authors":"Nafiseh Farazandehnia, Farzaneh Sotoudegan, Abbas Akhavan Sepahy, Mohamad Reza Fazeli","doi":"10.1186/s13568-024-01759-4","DOIUrl":"10.1186/s13568-024-01759-4","url":null,"abstract":"The research aimed to evaluate the antioxidative and antibacterial characteristics of aqueous sumac extract on methicillin-resistant Staphylococcus aureus through in-vitro and in-vivo study. Sumac extract has been obtained through the soaking method, and its antioxidant properties were gauged using the DPPH free radical scavenging method. The minimum inhibitory concentration (MIC) of sumac extract was determined on S. aureus obtained from hospitalized patients, as well as an assessment of biofilm-formation and the release of bacterial intracellular compounds. in vivo experimentation involved injecting bacteria (108 cfu/ml) into mice, which subsequently manifested indicators of symptoms of infection, and the number of bacteria within their bloodstream was quantified. The Sumac extract demonstrated strong antioxidant properties at concentrations of 1000 mg/ml. Furthermore, the agar tests for the gram staining, mannitol, coagulase, and DNase revealed that 190 cultured bacteria samples were identified as Staphylococcus aureus. These bacteria were resistant to clindamycin, ciprofloxacin, and methicillin antibiotics, but sensitive to erythromycin and penicillin antibiotics. Additionally, the bacteria displayed significant methicillin resistance and formed a strong biofilm (65.78%). The sumac extract showed a MIC range of 125-1000 µg/ml against Staphylococcus aureus. Treatment with concentrations above the MIC was found to prevent the formation of biofilm and increase the release of bacterial intracellular compounds. Sumac extract led to a decrease in bacterial count in the blood of mice and reduced signs of infection. Sumac extract demonstrated powerful antioxidant and antibacterial effects against resistant microorganisms, suggesting its potential as a promising compound for the treatment of resistant infections in future research.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"111"},"PeriodicalIF":3.5,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11450108/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363968","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

Fatty acid synthesis promoted by PA1895-1897 operon delays quorum sensing activation in Pseudomonas aeruginosa. 由 PA1895-1897 操作子促进的脂肪酸合成可延迟铜绿假单胞菌中法定量感应的激活。

IF 3.5 3区生物学

AMB Express Pub Date : 2024-10-01 DOI: 10.1186/s13568-024-01758-5

Lei Han, Jie Ren, Yishu Xue, Jianwei Gao, Qiang Fu, Ping Shao, Hui Zhu, Min Zhang, Fengming Ding

{"title":"Fatty acid synthesis promoted by PA1895-1897 operon delays quorum sensing activation in Pseudomonas aeruginosa.","authors":"Lei Han, Jie Ren, Yishu Xue, Jianwei Gao, Qiang Fu, Ping Shao, Hui Zhu, Min Zhang, Fengming Ding","doi":"10.1186/s13568-024-01758-5","DOIUrl":"10.1186/s13568-024-01758-5","url":null,"abstract":"PA1895-1897 is a quorum sensing (QS) operon regulated by the anti-activator LuxR homologue QscR in Pseudomonas aeruginosa. We aimed to investigate its impact on bacterial metabolism, and whether it contributes to the delayed QS activation. We performed liquid chromatograph-mass spectrometer-based metabolomics using wildtype PAO1, PA1895-1897-knockout mutant, and mutant with pJN105.PA1895-1897 overexpression vector. The impact of metabolites on QS signaling molecule (3OC12-HSL and C4-HSL) concentrations, pyocyanin production, and QS gene (lasR, lasI, rhlR, and rhlI) expression was examined. Metabolomics analysis found that fatty acid biosynthesis had the highest fold enrichment among all metabolic pathways in PA1895-1897-overexpressed mutants. Among these enriched fatty acids, palmitoleic acid and acetic acid were the predominantly abundant ones that significantly affected by PA1895-1897 operon. When different doses of exogenous palmitoleic acid or acetic acid were added to the cultures of PA1895-1897 knockout mutants, their levels of 3OC12-HSL, C4-HSL, and pyocyanin were decreased in a dose-dependent manner. High doses of palmitoleic acid and acetic acid suppressed the mRNA expression of lasR, rhlR, and rhlI. Inhibition of fatty acid biosynthesis increased the production of 3OC12-HSL, C4-HSL, and pyocyanin in PA1895-1897-overexpressed cultures. Our data suggest that fatty acid synthesis is promoted by PA1895-1897 operon, and contributes the delayed expression of QS phenotypes, furthering the understanding about the regulation of bacterial QS activation.","PeriodicalId":7537,"journal":{"name":"AMB Express","volume":"14 1","pages":"110"},"PeriodicalIF":3.5,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11445212/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142360940","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}

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