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Ishaq HM, Yasin R, Mohammad IS, Fan Y, Li H, Shahzad M, Xu J. The gut-brain-axis: A positive relationship between gut microbial dysbiosis and glioblastoma brain tumour. Heliyon 2024; 10:e30494. [PMID: 38756585 PMCID: PMC11096965 DOI: 10.1016/j.heliyon.2024.e30494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 04/28/2024] [Accepted: 04/28/2024] [Indexed: 05/18/2024] Open
Abstract
The glioblastoma brain tumour (GBM) stands out as the most aggressive and resistant-to-treatment malignancy. Nevertheless, the gut-brain connection plays a pivotal role in influencing the growth and activation of the central nervous system. In this particular investigation, we aimed to assess and characterize the gut microbial ecosystem in GBM patients, both quantitatively and qualitatively. We collected faecal samples from 15 healthy volunteers and 25 GBM patients. To delve into the microbial content, we employed PCR-DGGE, targeting the V3 region of the 16S rRNA gene, and conducted qPCR to measure the levels of crucial intestinal bacteria. For a more in-depth analysis, high-throughput sequencing was performed on a selection of 20 random faecal samples (10 from healthy individuals and 10 from GBM patients), targeting the V3+V4 region of the 16S rRNA gene. Our findings from examining the richness and diversity of the gut microbiota unveiled that GBM patients exhibited significantly higher microbial diversity compared to healthy individuals. At the phylum level, Proteobacteria saw a significant increase, while Firmicutes experienced a noteworthy decrease in the GBM group. Moving down to the family level, we observed significantly elevated levels of Enterobacteriaceae, Bacteroidaceae, and Lachnospiraceae in GBM patients, while levels of Veillonellaceae, Rikenellaceae, and Prevotellaceae were notably lower. Delving into genera statistics, we noted a substantial increase in the abundance of Parasutterella, Escherichia-Shigella, and Bacteroides, alongside significantly lower levels of Ruminococcus 2, Faecalibacterium, and Prevotella_9 in the GBM group compared to the control group. Furthermore, when examining specific species, we found a significant increase in Bacteroides vulgatus and Escherichia coli in the GBM group. These observations collectively indicate a marked dysbiosis in the gut microbial composition of GBM patients. Additionally, the GBM group exhibited notably higher levels of alpha diversity when compared to the control group. This increase in diversity suggests a significant bacterial overgrowth in the gut of GBM patients in contrast to the controls. As a result, this research opens up potential avenues to gain a better understanding of the underlying mechanisms, pathways, and potential treatments for GBM, stemming from the significant implications of gut microbial dysbiosis in these patients.
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Affiliation(s)
- Hafiz Muhammad Ishaq
- Department of Microbiology and Immunology, Key Laboratory of Environment and Genes Related to Diseases of Chinese Ministry of Education, School of Medicine, Xi'an Jiaotong University, Xi'an, China
- Department of Pathobiology and Biomedical Sciences, Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture Multan, Pakistan
| | - Riffat Yasin
- Department of Zoology University of Education Lahore, D.G. Khan Campus, Pakistan
| | - Imran Shair Mohammad
- Department of Radiology, City of Hope National Medical Center, 1500 East Duarte Rd., Duarte, CA, 91010, USA
| | - Yang Fan
- Department of Microbiology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Huan Li
- Xi'an Mental Health Centre, Xi'an, China
| | - Muhammad Shahzad
- Department of Pharmacology, University of Health Sciences, Khyaban-e-Jamia Punjab, Lahore, Pakistan
| | - Jiru Xu
- Department of Microbiology and Immunology, Key Laboratory of Environment and Genes Related to Diseases of Chinese Ministry of Education, School of Medicine, Xi'an Jiaotong University, Xi'an, China
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Kabiraz MP, Majumdar PR, Mahmud MC, Bhowmik S, Ali A. Conventional and advanced detection techniques of foodborne pathogens: A comprehensive review. Heliyon 2023; 9:e15482. [PMID: 37151686 PMCID: PMC10161726 DOI: 10.1016/j.heliyon.2023.e15482] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/13/2023] [Accepted: 04/11/2023] [Indexed: 05/09/2023] Open
Abstract
Foodborne pathogens are a major public health concern and have a significant economic impact globally. From harvesting to consumption stages, food is generally contaminated by viruses, parasites, and bacteria, which causes foodborne diseases such as hemorrhagic colitis, hemolytic uremic syndrome (HUS), typhoid, acute, gastroenteritis, diarrhea, and thrombotic thrombocytopenic purpura (TTP). Hence, early detection of foodborne pathogenic microbes is essential to ensure a safe food supply and to prevent foodborne diseases. The identification of foodborne pathogens is associated with conventional (e.g., culture-based, biochemical test-based, immunological-based, and nucleic acid-based methods) and advances (e.g., hybridization-based, array-based, spectroscopy-based, and biosensor-based process) techniques. For industrial food applications, detection methods could meet parameters such as accuracy level, efficiency, quickness, specificity, sensitivity, and non-labor intensive. This review provides an overview of conventional and advanced techniques used to detect foodborne pathogens over the years. Therefore, the scientific community, policymakers, and food and agriculture industries can choose an appropriate method for better results.
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Affiliation(s)
- Meera Probha Kabiraz
- Department of Biotechnology, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Priyanka Rani Majumdar
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, Kensington, NSW, 2052, Australia
- Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali, 3814, Bangladesh
| | - M.M. Chayan Mahmud
- CASS Food Research Centre, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, VIC, 3125, Australia
| | - Shuva Bhowmik
- Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali, 3814, Bangladesh
- Centre for Bioengineering and Nanomedicine, Faculty of Dentistry, Division of Health Sciences, University of Otago, Dunedin, 9054, New Zealand
- Department of Food Science, University of Otago, Dunedin, 9054, New Zealand
- Corresponding author. Centre for Bioengineering and Nanomedicine, Faculty of Dentistry, Division of Health Sciences, University of Otago, Dunedin, 9054, New Zealand.
| | - Azam Ali
- Centre for Bioengineering and Nanomedicine, Faculty of Dentistry, Division of Health Sciences, University of Otago, Dunedin, 9054, New Zealand
- Corresponding author.
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Based on intervening PCR for detection of alkaline phosphatase and zearalenone. Microchem J 2023. [DOI: 10.1016/j.microc.2022.108314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Zhang J, Liu W, Li J, Lu K, Wen H, Ren J. Rapid bacteria electrochemical sensor based on cascade amplification of 3D DNA walking machine and toehold-mediated strand displacement. Talanta 2022; 249:123646. [DOI: 10.1016/j.talanta.2022.123646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 11/27/2022]
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5
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Ishaq HM, Mohammad IS, Sher Muhammad K, Li H, Abbas RZ, Din Sindhu ZU, Ullah S, Fan Y, Sadiq A, Raza MA, Hussain R, Arshad HM, Khan I, Waqas MU, Ul-Rahman A, Yasin R, Rehman A, Akhtar RW, Xu J. Gut microbial dysbiosis and its association with esophageal cancer. J Appl Biomed 2021; 19:1-13. [PMID: 34907711 DOI: 10.32725/jab.2021.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 01/22/2021] [Indexed: 12/15/2022] Open
Abstract
Due to its aggressive nature and low survival rate, esophageal cancer is one of the deadliest cancer. While the intestinal microbiome significantly influences human health and disease. This research aimed to investigate and characterize the relative abundance of intestinal bacterial composition in esophageal cancer patients. The fecal samples were collected from esophageal cancer patients (n = 15) and healthy volunteers (n = 10). The PCR-DGGE was carried out by focusing on the V3 region of the 16S rRNA gene, and qPCR was performed for Bacteroides vulgatus, Escherichia coli, Bifidobacterium, Clostridium leptum and Lactobacillus. High-throughput sequencing of the 16S rRNA gene targeting the V3+V4 region was performed on 20 randomly selected samples. PCR-DGGE and High-throughput diversity results showed a significant alteration of gut bacterial composition between the experimental and control groups, which indicates the gut microbial dysbiosis in esophageal cancer patients. At the phylum level, there was significant enrichment of Bacteroidetes, while a non-significant decrease of Firmicutes in the experimental group. At family statistics, a significantly higher level of Bacteroidaceae and Enterobacteriaceae, while a significantly lower abundance of Prevotellaceae and Veillonellaceae were observed. There was a significantly high prevalence of genera Bacteroides, Escherichia-Shigella, while a significantly lower abundance of Prevotella_9 and Dialister in the experimental group as compared to the control group. Furthermore, the species analysis also showed significantly raised level of Bacteroides vulgatus and Escherichia coli in the experimental group. These findings revealed a significant gut microbial dysbiosis in esophageal cancer patients. So, the current study can be used for the understanding of esophageal cancer treatment, disease pathway, mechanism, and probiotic development.
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Affiliation(s)
- Hafiz Muhammad Ishaq
- University of Veterinary and Animal Sciences, Department of Clinical Sciences, Section of Epidemiology and public Health, Lahore Sub-campus Jhang, Pakistan.,Muhammad Nawaz Shareef University of Agriculture Multan, Department of Veterinary and Animal Sciences, Multan, Pakistan
| | - Imran Shair Mohammad
- Sun Yat-sen University, University Town, School of Pharmaceutical Sciences, Guangzhou 510006, China
| | - Kiran Sher Muhammad
- University of Agriculture, Department of Zoology Wild-life and Fisheries, Faisalabad, Pakistan
| | - Huan Li
- Xi'an Mental Health Centre, Xi'an, China
| | - Rao Zahid Abbas
- University of Agriculture Faisalabad-38040, Department of Parasitology, Faisalabad, Pakistan
| | - Zia Ud Din Sindhu
- University of Agriculture Faisalabad-38040, Department of Parasitology, Faisalabad, Pakistan
| | - Shakir Ullah
- University of Veterinary and Animal Sciences, Department of Clinical Sciences, Section of Epidemiology and public Health, Lahore Sub-campus Jhang, Pakistan
| | - Yang Fan
- Xinxiang Medical University, School of Basic Medical Science, Department of Microbiology, Xinxiang, China
| | - Abbas Sadiq
- Faculty of Veterinary and Animal Sciences Lahore, Department of Pathology, Lahore, Pakistan
| | - Muhammad Asif Raza
- Muhammad Nawaz Shareef University of Agriculture Multan, Department of Veterinary and Animal Sciences, Multan, Pakistan
| | - Riaz Hussain
- Islamia University of Bahawalpur-63100, Faculty of Veterinary and Animal Sciences, Department of Pathology, Bahawalpur, Pakistan
| | | | | | - Muhammad Umair Waqas
- Muhammad Nawaz Shareef University of Agriculture Multan, Department of Veterinary and Animal Sciences, Multan, Pakistan
| | - Aziz Ul-Rahman
- Muhammad Nawaz Shareef University of Agriculture Multan, Department of Veterinary and Animal Sciences, Multan, Pakistan
| | - Riffat Yasin
- Muhammad Nawaz Shareef University of Agriculture Multan, Department of Veterinary and Animal Sciences, Multan, Pakistan
| | - Atif Rehman
- Muhammad Nawaz Shareef University of Agriculture Multan, Department of Veterinary and Animal Sciences, Multan, Pakistan
| | - Rana Waseem Akhtar
- Muhammad Nawaz Shareef University of Agriculture Multan, Department of Veterinary and Animal Sciences, Multan, Pakistan
| | - Jiru Xu
- University of Veterinary and Animal Sciences, Department of Clinical Sciences, Section of Epidemiology and public Health, Lahore Sub-campus Jhang, Pakistan
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Occurrence of Virulence Genes and Antimicrobial Resistance of E. coli O157:H7 Isolated from the Beef Carcass of Bahir Dar City, Ethiopia. Vet Med Int 2021; 2021:8046680. [PMID: 34580607 PMCID: PMC8464425 DOI: 10.1155/2021/8046680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 08/26/2021] [Indexed: 11/17/2022] Open
Abstract
E. coli O157:H7 is one of the most virulent foodborne pathogens. The aim of this study was to isolate E. coli O157:H7, determine virulence genes carried by the organism, and assess the antimicrobial susceptibility pattern of the isolates from beef carcass samples at Bahir Dar city. Swab samples (n = 280) were collected from the carcass of cattle slaughtered at the abattoir and processed using sorbitol MacConkey agar supplemented with cefixime telluride and confirmed with latex agglutination test. A polymerase chain reaction was performed on isolates for the detection of virulence genes stx1, stx2, hlyA, and eae. Antimicrobial susceptibility testing was performed using the disk diffusion method. Of 280 samples processed, 25 (8.9%) isolates were positive. Out of 25 isolates subjected for molecular detection, 8 (32%) and 14 (56%) isolates possessed stx1 and stx2 genes, respectively; from those, 5 (20%) isolates had both genes for the production of Shiga toxins. Compared from other virulent genes relatively higher proportion of 18 (72%) isolates carried the hlyA gene. Only 5 (2%) isolates were positive for eae. Resistance was detected in all 25 (100%) isolates and 3 (12%) against clindamycin and trimethoprim, respectively. This study result highlights the potential threat to public health. The abattoir workers need to be aware about the pathogen and should follow appropriate practices to prevent contamination of meat intended for human consumption.
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Fang S, Song D, Zhuo Y, Chen Y, Zhu A, Long F. Simultaneous and sensitive determination of Escherichia coli O157:H7 and Salmonella Typhimurium using evanescent wave dual-color fluorescence aptasensor based on micro/nano size effect. Biosens Bioelectron 2021; 185:113288. [PMID: 33962158 DOI: 10.1016/j.bios.2021.113288] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 04/09/2021] [Accepted: 04/24/2021] [Indexed: 02/01/2023]
Abstract
The simultaneous and sensitive determination of two common pathogenic bacteria, Escherichia coli O157:H7 (E. coli O157:H7) and Salmonella Typhimurium (S. Typhimurium) was achieved using evanescent wave dual-color fluorescence aptasensor and the fiber nanoprobe through combining the micro/nano size and time-resolved effect. Two fluorescence labeled aptasensors, Cy3-apt-E and Cy5.5-apt-S, were regarded as biorecognition elements and signal reporters for E. coli O157:H7 and S. Typhimurium, which were alternatively excited by evanescent waves originated from 520 nm to 635 nm excitation lights, respectively. The fiber nanoprobe with in-situ etched nanopores was used for distinguishing free aptasensors and aptasensors bound to pathogenic bacteria based on the limited penetrated depth of evanescent wave and the significant size difference of bacteria and nanopore. The E. coli O157:H7 and S. Typhimurium were directly and simultaneously quantitated in less than 35 min without the requirement of the complex immobilization of biorecognition molecules and bacteria enrichment/separation processes. The limits of detection of E. coli O157:H7 and S. Typhimurium were 340 CFU/mL and 180 CFU/mL, respectively. The satisfied recovery rate of real samples testing verified the feasibility and accuracy of the proposed method. Our strategy not only greatly simplifies the detection and identification process of multiple pathogenic bacteria, but also is easy to extend as a universal technology for sensitive determination of other bacteria using their respective biorecognition molecules.
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Affiliation(s)
- Shunyan Fang
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100874, China
| | - Dan Song
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100874, China
| | - Yuxin Zhuo
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100874, China
| | - Yuan Chen
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100874, China
| | - Anna Zhu
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China.
| | - Feng Long
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100874, China.
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Identification of Dysfunctional Gut Microbiota Through Rectal Swab in Patients with Different Severity of Acute Pancreatitis. Dig Dis Sci 2020; 65:3223-3237. [PMID: 32076933 DOI: 10.1007/s10620-020-06061-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 01/09/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Acute pancreatitis (AP) has a wide spectrum of severity and can be associated with considerable morbidity and mortality. Whether gut microbiota dysbiosis is associated with AP severity remains obscure. AIMS We aim to investigate the differences in the alterations of gut microbiota in different grades of AP severity. METHODS We collected clinical information and rectal swab samples from 80 individuals. The gut microbiota was tested by 16S rRNA gene sequencing, gut microbiota species composition analysis, difference analysis, random forest model prediction analysis, and gut microbiota species correlation network analysis. RESULTS There was a different microbiota profile in different severity grades. Bacteroides, Escherichis-Shigella, and Enterococcus were dominant species in mild, moderately severe, and severe AP, respectively. Finegoldia was the most significantly increased and Blautia the most decreased species in mild AP. Anaerococcus was the most significantly increased and Eubacterium hallii the most decreased species in moderately severe AP. Enterococcus was the most significantly increased and Eubacterium hallii the most decreased species in severe AP. Finegoldia, Eubacterium_hallii, and Lachnospiraceae were potential diagnostic biomarkers for mild AP and Eubacterium_hallii and Anaerococcus for moderately severe AP. There was a positive interaction between Firmicutes and Bacteroidetes in mild AP. CONCLUSIONS The disturbed gut microbiota is different among grades of AP, suggesting their potential role in the progression of disease severity. There was a different microbiota profile in different severity grades. Bacteroides, Escherichis-Shigella, and Enterococcus were dominant gut microbiota species in MAP, MSAP, and SAP, respectively. Finegoldia was the most significantly increased and Blautia the most decreased gut microbiota species in MAP. Anaerococcus was the most significantly increased and Eubacterium hallii the most decreased species in MSAP. Enterococcus was the most significantly increased and Eubacterium hallii the most decreased species in SAP. Finegoldia, Eubacterium_hallii, and Lachnospiraceae were potential diagnostic biomarkers for MAP and Eubacterium_hallii and Anaerococcus for MSAP. There was a positive interaction between Firmicutes and Bacteroidetes in MAP.
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Kim J, Park JY, Park YJ, Park SY, Lee MS, Koo C. A portable and high-sensitivity optical sensing system for detecting fluorescently labeled enterohaemorrhagic Escherichia coli Shiga toxin 2B-subunit. PLoS One 2020; 15:e0236043. [PMID: 32673369 PMCID: PMC7365435 DOI: 10.1371/journal.pone.0236043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/28/2020] [Indexed: 11/18/2022] Open
Abstract
We developed a stand-alone, real-time optical detection device capable of reading fluorescence intensities from cell samples with high sensitivity and precision, for use as a portable fluorescent sensor for sensing fluorescently labeled enterohemorrhagic Escherichia coli (EHEC) Shiga toxins (Stxs). In general, the signal intensity from the fluorescently labeled Stxs was weak due to the small number of molecules bound to each cell. To address this technical challenge, we used a highly sensitive light detector (photomultiplier tube: PMT) to measure fluorescence, and designed a portable optical housing to align optical parts precisely; the housing itself was fabricated on a 3D printer. In addition, an electric circuit that amplified PMT output was designed and integrated into the system. The system shows the toxin concentration in the sample on a liquid crystal display (LCD), and a microcontroller circuit is used to read PMT output, process data, and display results. In contrast to other portable fluorescent detectors, the system works alone, without any peripheral computer or additional apparatus; its total size is about 17 × 13 × 9 cm3, and it weighs about 770 g. The detection limit was 0.01 ppm of Alexa Fluor 488 in PBS, which is ten thousand times lower than those of other smartphone-based systems and sufficiently sensitive for use with a portable optical detector. We used the portable real-time optical sensing system to detect Alexa Fluor 488–tagged Stx2B-subunits bound to monocytic THP-1 cells expressing the toxin receptor globotriaosylceramide (Gb3). The device did not detect a signal from Gb3-negative PD36 cells, indicating that it was capable of specifically detecting Stxs bound to cells expressing the toxin receptor. Following the development of a rapid and autonomous method for fluorescently tagging cells in food samples, the optical detection system described here could be used for direct detection of Shiga toxins in food in the field.
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Affiliation(s)
- Jeongtae Kim
- Department of Electronics and Control Engineering, Hanbat National University, Daejeon, Republic of Korea
| | - Jun-Young Park
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Young-Jun Park
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Republic of Korea
| | - Seo-Young Park
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Moo-Seung Lee
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Republic of Korea
- * E-mail: (MSL); (CK)
| | - Chiwan Koo
- Department of Electronics and Control Engineering, Hanbat National University, Daejeon, Republic of Korea
- * E-mail: (MSL); (CK)
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Pakbin B, Akhondzadeh Basti A, Khanjari A, Azimi L, Karimi A. Differentiation of stx1A gene for detection of Escherichia coli serotype O157: H7 and Shigella dysenteriae type 1 in food samples using high resolution melting curve analysis. Food Sci Nutr 2020; 8:3665-3672. [PMID: 32724629 PMCID: PMC7382201 DOI: 10.1002/fsn3.1649] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 01/25/2023] Open
Abstract
Escherichia coli serotype O157: H7 and Shigella dysenteriae type 1 as the Shiga toxin-producing bacteria cause some acute gastrointestinal and extraintestinal diseases such as hemorrhagic uremic syndrome and bloody diarrhea in human. Stx genes are the key virulence factors in these pathogens. The aim of this study was to develop HRMA assay to differentiate stx1A gene for detection of E. coli serotype O157: H7 and Sh. dysenteriae type 1 and determine the prevalence of these pathogens in food samples using this method. PCR-HRMA assay and gold standard methods have been carried out for identification of pathogens among 135 different food samples. We found HRMA method a sensitive and specific assay (100 and 100%, respectively) for differentiation of stx1A gene, consequently, detection of these pathogens in food samples. Also, the highest prevalence of E. coli serotype O157: H7 and Sh. dysenteriae type 1 harboring stx1A gene was observed in raw milk and vegetable salad samples, respectively. HRMA as a rapid, inexpensive, sensitive and specific method is suggested to be used for differentiation of stx1A gene to detect E. coli serotype O157: H7 and Sh. dysenteriae type 1 as the key pathogens for safety evaluation of food samples.
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Affiliation(s)
- Babak Pakbin
- Department of Food Hygiene and Quality of ControlFaculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Afshin Akhondzadeh Basti
- Department of Food Hygiene and Quality of ControlFaculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Ali Khanjari
- Department of Food Hygiene and Quality of ControlFaculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Leila Azimi
- Pediatric Infections Research CenterResearch Institute of children’s HealthShahid Beheshti University of Medical SciencesTehranIran
| | - Abdollah Karimi
- Pediatric Infections Research CenterResearch Institute of children’s HealthShahid Beheshti University of Medical SciencesTehranIran
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XU C, LUO H, ZHANG Y. Development of multiplex loop-mediated isothermal amplification for three foodborne pathogens. FOOD SCIENCE AND TECHNOLOGY 2020. [DOI: 10.1590/fst.07319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Cong XU
- Research Center of Agricultural of Dongguan City, China
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12
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Liu L, Zhao G, Dou W. An unplugged and quantitative foam based immunochromatographic assay for Escherichia coli O157:H7 using nanozymes to catalyze hydrogen peroxide decomposition reaction. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104313] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Mushtaq N, Hussain S, Zhang S, Yuan L, Li H, Ullah S, Wang Y, Xu J. Molecular characterization of alterations in the intestinal microbiota of patients with grade 3 hypertension. Int J Mol Med 2019; 44:513-522. [PMID: 31173179 PMCID: PMC6605625 DOI: 10.3892/ijmm.2019.4235] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 05/30/2019] [Indexed: 12/31/2022] Open
Abstract
Hypertension has become a major risk factor for many diseases, including cardiovascular, cerebrovascular and kidney disorders. It has been reported that the composition of human gut microbiota is changed during the progression of cardiovascular and kidney diseases. The current study aimed to qualitatively and quantitatively compare the composition of gut microbiota between patients with hypertension and healthy controls. Fecal samples were collected from 50 patients diagnosed with grade 3 hypertension and 30 healthy controls. Touchdown PCR-denaturing gradient gel electrophoresis with primers specifically targeting the V3 region of 16S ribosomal RNA, and quantitative PCR, were performed to characterize all the samples. High-throughput sequencing of the V3-V4 regions was performed on 30 randomly selected samples. By comparing diversity and richness indices, the gut microbiome of the hypertensive individuals was found to be more diverse than that of the healthy controls. Among the main bacterial phlya that reside in the gut, Bacteroidetes, Firmicutes and Proteobacteria were dominant in all the samples; however the Firmicutes to Bacteroidetes ratio was variable, with a significant increase in the patients with hypertension compared with the healthy control group. In addition, at the genus level, there was an increased abundance of Prevotella_9, Megasphaera, Parasutterella and Escherichia-Shigella in patients with hypertension, while Bacteroides and Faecalibacterium were decreased. These results suggested that the human gut microbiota is altered in hypertension, and understanding the mechanism of these changes in microbial composition may open up new insights, and help to treat hypertension and other related diseases.
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Affiliation(s)
- Nosheen Mushtaq
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Safdar Hussain
- Department of Molecular Biology and Biochemistry, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Siruo Zhang
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Lu Yuan
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Huan Li
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Shakir Ullah
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yan Wang
- Clinical Laboratory, Xi'an No. 5 Hospital, Xi'an, Shaanxi 710061, P.R. China
| | - Jiru Xu
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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Elahi N, Baghersad MH, Kamali M. Precise, direct, and rapid detection of Shigella Spa gene by a novel unmodified AuNPs-based optical genosensing system. J Microbiol Methods 2019; 162:42-49. [PMID: 31100315 DOI: 10.1016/j.mimet.2019.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 05/11/2019] [Accepted: 05/13/2019] [Indexed: 11/29/2022]
Abstract
Early detection of infectious bacteria is a necessity for combating infectious diseases. Due to low infectious dose of Shigella, rapid and sensitive detection is needed. Compared to the presented genes, Spa gene can be introduced as a novel sequence for all species of Shigella detection. Herein, the possibility of Spa genes for detection of four species of Shigella was investigated for the first time by AuNPs-based optical genosensing system. In this method, AuNP-DNA probes were hybridized with Spa gene sequence. When the complementary target is present, it prevents the aggregation of the complex under acid environment and the solution remains red whereas in the absence of the specific sequence, it turns to purple. Therefore, visual detection is possible with bare eye. The comparison of this Optical DNA biosensor and PCR-based method showed that the proposed method is simple, cost-effective, rapid operation, with high or comparable detection limit of (LOD and LOQ: 8.14 and 26.6 ng mLl-1, respectively), without need of any expensive techniques, and equipments compared to the conventional methods. In conclusion, the described method may develop into a platform that could be utilized for detection of various bacterial species with high accuracy and prompt screening of samples.
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Affiliation(s)
- Narges Elahi
- Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohammad Hadi Baghersad
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mehdi Kamali
- Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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15
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To CZ, Bhunia AK. Three Dimensional Vero Cell-Platform for Rapid and Sensitive Screening of Shiga-Toxin Producing Escherichia coli. Front Microbiol 2019; 10:949. [PMID: 31134009 PMCID: PMC6514307 DOI: 10.3389/fmicb.2019.00949] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 04/15/2019] [Indexed: 01/27/2023] Open
Abstract
Shiga-toxin producing Escherichia coli (STEC) is a serious public health concern. Current Vero cell assay, although sensitive, is lengthy and requires 48-72 h to assess STEC presence in a sample. In this study, we investigated if Vero cells in a three-dimensional (3D) platform would provide improved sensitivity for rapid screening of STEC. Vero cells (epithelial kidney cell line) were grown as a monolayer (2D) or in a collagen-matrix (3D) and exposed to Shiga-toxin (Stx) preparation or STEC cells that were pre-exposed to antibiotics (mitomycin C, ciprofloxacin, or polymyxin B) for toxin induction. Lactate dehydrogenase (LDH) release from Vero cells was used as a biomarker for cytotoxicity. Modified tryptic soy broth (mTSB) as enrichment broth containing mitomycin C (2 μg/ml) or ciprofloxacin (100 ng/ml) significantly induced Stx production, which was further confirmed by the dot-immunoblot assay. The 3D Vero platform detected STEC after 6 h post-infection with cytotoxicity values ranging from 33 to 79%, which is considerably faster than the traditional 2D platform, when tested with STEC. The cytotoxicity for non-Stx producing bacteria, Salmonella, Listeria, Citrobacter, Serratia, and Hafnia was found to be below the cytotoxicity cutoff value of 15%. The detection limit for the 3D Vero cell assay was estimated to be 107 CFU/ml for bacteria and about 32 ng/ml for Stx in 6 h. STEC-inoculated ground beef samples (n = 27) resulted in 38-46% cytotoxicity, and the bacterial isolates (n = 42) from ground beef samples were further confirmed to be stx1 and stx2 positive in a multiplex PCR yielding a very low false-positive result. This 3D cell-based screening assay relies on mammalian cell pathogen interaction that can complement other molecular techniques for the detection of cell-free Stx or STEC cells from food samples for early detection and prevention.
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Affiliation(s)
- Celina Z. To
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States
| | - Arun K. Bhunia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States
- Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, United States
- Purdue Institute of Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, IN, United States
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16
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Rapid detection and control of psychrotrophic microorganisms in cold storage foods: A review. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.02.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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17
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Liang T, Zhou P, Zhou B, Xu Q, Zhou Z, Wu X, Aguilar ZP, Xu H. Simultaneous quantitative detection of viable Escherichia coli O157:H7, Cronobacter spp., and Salmonella spp. using sodium deoxycholate-propidium monoazide with multiplex real-time PCR. J Dairy Sci 2019; 102:2954-2965. [DOI: 10.3168/jds.2018-15736] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 12/20/2018] [Indexed: 01/18/2023]
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18
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Hu J, Huang R, Wang Y, Wei X, Wang Z, Geng Y, Jing J, Gao H, Sun X, Dong C, Jiang C. Development of duplex PCR-ELISA for simultaneous detection of Salmonella spp. and Escherichia coli O157: H7 in food. J Microbiol Methods 2018; 154:127-133. [PMID: 30393180 DOI: 10.1016/j.mimet.2018.10.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 10/26/2018] [Indexed: 11/28/2022]
Abstract
In the current study, a duplex PCR-ELISA method was developed targeting the specific genes, invA of Salmonella spp. and rfbE of Escherichia coli O157: H7, to detect one or both bacteria in food. In brief, PCR product amplified by PCR primer labeled with digoxin at the 5'-end and a probe labeled with biotin at the 3'-end can form dimer by nucleic acid hybridization which can be captured by binding of biotin to streptomycin coated in ELISA plate before using enzyme-labeled anti-digoxin antibody and substrate to develop color. Also, evaluation of the duplex PCR-ELISA method was conducted in different food samples including milk, juice, cabbage, shrimp, chicken, pork and beef. Results indicated that the duplex PCR-ELISA developed here was specific when using 25 non-target bacteria strains as controls and was sensitive with a limit of detection (LOD) of 1 CFU/mL, 1, 000 times higher than that of the duplex PCR method and was repeatable regardless of inter- and intra-batch variations. The duplex PCR-ELISA method established in the present study has proven to be highly specific, sensitive and repeatable. It has the potential to be applied in such fields as clinical diagnosis of food-borne diseases, food hygiene monitoring and pathogen detection in food.
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Affiliation(s)
- Jinqiang Hu
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China; Collaborative Innovation Center of Food Production and Safety, Zhengzhou 450000, Henan Province, China; Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450000, Henan Province, China.
| | - Runna Huang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Yi Wang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Xiangke Wei
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Zhangcun Wang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Yao Geng
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Jianzhou Jing
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Hui Gao
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Xincheng Sun
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Caiwen Dong
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Chunpeng Jiang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
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19
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Wang Y, Bai J, Qu X, Gao Y, Wang J, Li S, Fan L, Wei H, Liu S, Peng Y, Gao Z, Zhu Y, Gao Z, Ning B. High-specificity double-stranded DNA detection with a "humanoid" molecular beacon and TALEs. NANOSCALE 2018; 10:18354-18361. [PMID: 30255908 DOI: 10.1039/c8nr05759a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Owing to the limitation of DNA-specific recognition, improving the sensitivity of bacteria detection without additional culture poses a considerable challenge. Herein, a sensitive, novel, and high-specificity fluorescence detection method was developed using transcription activator-like effectors (TALEs) as the specifically recognized element. Based on the property of TALEs for recognizing double-stranded DNA, the detection method was first proposed. Its sensitivity was further improved by isothermal amplification of RPA. The "humanoid" molecular beacon (H-MB) was designed to achieve signal output. The steric hindrance of the protein opens the stem, enhancing the fluorescence intensity of an attached FAM/BHQ-1 pair. This method can be used to detect Escherichia coli O157:H7 with single-base mismatch specificity and high sensitivity (detection limit of 3 cfu mL-1) and can be applied in actual sample detection by boiling the sample for 10 min. TALEs can be assembled according to the target, so the method can be used to detect other foodborne pathogens and viruses in the food safety and clinical fields.
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Affiliation(s)
- Yu Wang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Academy of Military Medical Science, Academy of Military Science, Tianjin 300050, P.R. China.
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20
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Huang H, Zhao G, Dou W. Portable and quantitative point-of-care monitoring of Escherichia coli O157:H7 using a personal glucose meter based on immunochromatographic assay. Biosens Bioelectron 2018; 107:266-271. [DOI: 10.1016/j.bios.2018.02.027] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/28/2018] [Accepted: 02/09/2018] [Indexed: 01/23/2023]
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21
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Yang X, Feng L, Qin X. Preparation of the Cf-GQDs-Escherichia coli O157: H7 Bioprobe and Its Application in Optical Imaging and Sensing of Escherichia coli O157: H7. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1207-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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Ishaq HM, Mohammad IS, Guo H, Shahzad M, Hou YJ, Ma C, Naseem Z, Wu X, Shi P, Xu J. Molecular estimation of alteration in intestinal microbial composition in Hashimoto’s thyroiditis patients. Biomed Pharmacother 2017; 95:865-874. [DOI: 10.1016/j.biopha.2017.08.101] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 08/11/2017] [Accepted: 08/23/2017] [Indexed: 12/17/2022] Open
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23
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Mirhosseini SA, Fooladi AAI, Amani J, Sedighian H. Production of recombinant flagellin to develop ELISA-based detection of Salmonella Enteritidis. Braz J Microbiol 2017; 48:774-781. [PMID: 28739413 PMCID: PMC5628325 DOI: 10.1016/j.bjm.2016.04.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 04/04/2016] [Indexed: 01/22/2023] Open
Abstract
Food-borne diseases, caused by the pathogenic bacteria, are highly prevalent in the world. Salmonella is one of the most important bacterial genera responsible for this. Salmonella Enteritidis (SE) is one of the non-typhoid Salmonellae that can be transmitted to human from poultry products, water, and contaminated food. In recent years, new and rapid detection methods such as enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR) have been developed. In this study, recombinant FliC (rFliC) was produced to be used as an antigen. The immunization was conducted in mice with the purified recombinant FliC (rFliC). The mice were subcutaneously immunized with rFliC and elicited significant rFliC specific serum IgG antibodies. An indirect ELISA system was established for the detection of Salmonella Enteritidis. Our results confirmed that the recombinant flagellin can be one of the excellent indicators for the detection of Salmonella Enteritidis.
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Affiliation(s)
- Seyed Ali Mirhosseini
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Abbas Ali Imani Fooladi
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Jafar Amani
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Hamid Sedighian
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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24
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Strategy for Accurate Detection of Escherichia Coli O157:H7 in Ground Pork Using a Lateral Flow Immunoassay. SENSORS 2017; 17:s17040753. [PMID: 28368342 PMCID: PMC5421713 DOI: 10.3390/s17040753] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/21/2017] [Accepted: 03/28/2017] [Indexed: 11/17/2022]
Abstract
Escherichia coli O157:H7 is known to cause serious diseases including hemorrhagic colitis and hemolytic uremic syndrome. A gold nanoparticle lateral flow immunoassay (Au-LFIA) was used to detect Escherichia coli O157:H7 in ground pork samples. False-positive results were detected using Au-LFIA; a Citrobacter freundii strain was isolated from the ground pork samples and identified by using CHROmagarTM plates, API 20E, and 16S RNA sequencing. Since C. freundii showed cross-reactivity with E. coli O157:H7 when Au-LFIA test strips were used, a novel method combining modified enrichment with a lateral flow immunoassay for accurate and convenient detection of E. coli O157:H7 in ground pork was developed in this study to minimize these false positives. MacConkey broth was optimized for E. coli O157:H7 enrichment and C. freundii inhibition by the addition of 5 mg/L potassium tellurite and 0.10 mg/L cefixime. Using the proposed modified enrichment procedure, the false-positive rate of ground pork samples spiked with 100 CFU/g C. freundii decreased to 5%.
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25
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Saeedi P, Yazdanparast M, Behzadi E, Salmanian AH, Mousavi SL, Nazarian S, Amani J. A review on strategies for decreasing E. coli O157:H7 risk in animals. Microb Pathog 2017; 103:186-195. [PMID: 28062285 DOI: 10.1016/j.micpath.2017.01.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 12/25/2016] [Accepted: 01/02/2017] [Indexed: 11/17/2022]
Abstract
Enterohemorrhagic Escherichia coli (EHEC) serotype O157:H7 is a food-borne pathogen that younger children are most prone to this microorganism. Hemolytic Uremic Syndrome (HUS) caused by EHEC, leads to the destruction of red blood cells and kidney failure. The virulence of E.coli O157:H7 is attributed to fimbriae, that facilitate colonization of bacteria within the colon and verotoxins (VT) or Shiga toxins (Stx) that are released into the blood. Although, in most cases, the infection is self-limitedin young children and aged population, it may cause HUS. Therefore, several investigations are performed in order to offer effective therapies and vaccines, which can prevent and treat the infection in appropriate time. As the pathogenesis of this infection is complicated, a multi-targeted strategy is required. Since cattle are the most important reservoir of EHEC and the root of contamination, reducing E. coli O157:H7 at the farm level should decrease the risk of human illness. Several vaccine approaches have been employed with different proper outcomes in animal models, including recombinant proteins (virulence factors such as; Stx1/2, intimin, EspA, fusion proteins of A and B Stx subunits), avirulent ghost cells of EHEC O157:H7, live attenuated bacteria expressing recombinant proteins, recombinant fimbrial proteins. In addition to protein-based vaccines, DNA vaccines have provided proper prevention in the laboratory animal model. This review paper summarizes the previous studies, current status and future perspective of different immunization strategies for eradicating Enterohemorrhagic Escherichia coli O157:H7.
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Affiliation(s)
- Pardis Saeedi
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Maryam Yazdanparast
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran
| | - Elham Behzadi
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ali Hatef Salmanian
- Plant Bioproducts Department, Institute of Agricultural Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Seyed Latif Mousavi
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran
| | - Shahram Nazarian
- Department of Biology, Faculty of Science, Imam Hossein University, Tehran, Iran
| | - Jafar Amani
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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26
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Huang Z, Cui X, Xie QY, Liu DF, Lai WH. Short communication: A novel method using immunomagnetic separation with a fluorescent nanobeads lateral flow assay for the rapid detection of low-concentration Escherichia coli O157:H7 in raw milk. J Dairy Sci 2016; 99:9581-9585. [DOI: 10.3168/jds.2016-11780] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 08/12/2016] [Indexed: 11/19/2022]
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27
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Rapid and Specific Polymerase Chain Reaction-Enzyme Linked Immunosorbent Assay for Detection of Escherichia coli LT Toxin From Clinical Isolates. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2016. [DOI: 10.5812/archcid.36261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Balakrishnan B, Barizuddin S, Wuliji T, El-Dweik M. A rapid and highly specific immunofluorescence method to detect Escherichia coli O157:H7 in infected meat samples. Int J Food Microbiol 2016; 231:54-62. [DOI: 10.1016/j.ijfoodmicro.2016.05.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 04/15/2016] [Accepted: 05/12/2016] [Indexed: 11/26/2022]
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29
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Song C, Li J, Liu J, Liu Q. Simple sensitive rapid detection of Escherichia coli O157:H7 in food samples by label-free immunofluorescence strip sensor. Talanta 2016; 156-157:42-47. [DOI: 10.1016/j.talanta.2016.04.054] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 04/09/2016] [Accepted: 04/24/2016] [Indexed: 11/16/2022]
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30
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DNA-based hybridization chain reaction and biotin-streptavidin signal amplification for sensitive detection of Escherichia coli O157:H7 through ELISA. Biosens Bioelectron 2016; 86:990-995. [PMID: 27498326 DOI: 10.1016/j.bios.2016.07.049] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 07/14/2016] [Indexed: 12/12/2022]
Abstract
This study reported on a novel sandwich enzyme linked immunosorbent assay (ELISA) for the sensitive determination of Escherichia coli O157:H7 (E. coli O157:H7) by using DNA-based hybridization chain reaction (HCR) and biotin-streptavidin signal amplification. The anti-E. coli O157:H7 polyclonal antibody (pAb) was immobilized in the ELISA wells. The anti-E. coli O157:H7 monoclonal antibody (mAb) and initiator strand (DNA1) were labeled on gold nanoparticle (AuNP) to form a mAb-AuNP-DNA1 complex. In the presence of the target E. coli O157:H7, the sandwiched immunocomplex, which is pAb-E. coli O157:H7-mAb-AuNP-DNA1, could be formed. Two types of biotinylated hairpin were subsequently added in the ELISA well. A nicked double-stranded DNA (dsDNA) that contained abundant biotins was formed after HCR. Detection was performed after adding horseradish peroxidase-streptavidin and substrate/chromogen solution. Under optimal conditions, E. coli O157:H7 could be detected in the range of 5×10(2) CFU/mL to 1×10(7) CFU/mL; the limit of detection was 1.08×10(2) CFU/mL in pure culture. The LOD of the novel ELISA was 185 times lower than that of traditional ELISA. The proposed method is considerably specific and can be applied in the detection of whole milk samples inoculated with E. coli O157:H7. The coefficient of variation of in pure culture and in whole milk was 0.99-5.88% and 0.76-5.38%, respectively. This method offers a promising application in the detection of low concentrations of food-borne pathogens.
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31
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Shan S, Liu D, Guo Q, Wu S, Chen R, Luo K, Hu L, Xiong Y, Lai W. Sensitive detection of Escherichia coli O157:H7 based on cascade signal amplification in ELISA. J Dairy Sci 2016; 99:7025-7032. [PMID: 27394946 DOI: 10.3168/jds.2016-11320] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 05/25/2016] [Indexed: 01/11/2023]
Abstract
In this study, cascade signal amplification in ELISA involving double-antibody sandwich ELISA and indirectly competitive ELISA was established to sensitively detect Escherichia coli O157:H7. In the double-antibody sandwich ELISA, a complex was formed comprising anti-E. coli O157:H7 polyclonal antibody, E. coli O157:H7, biotinylated anti-E. coli O157:H7 monoclonal antibody, streptavidin, and biotinylated β-lactamase. Penicillin solution was then added into the ELISA well and hydrolyzed by β-lactamase. Afterward, the penicillin solution was transferred to indirectly competitive ELISA. The concentration of penicillin can be sensitively detected in indirectly competitive ELISA. In the cascade signal amplification system, increasing the amount of added E. coli O157:H7 resulted in more β-lactamase and less penicillin. The detection sensitivity of E. coli O157:H7, which was 20cfu/mL with the cascade signal amplification in ELISA, was 1,000-fold higher than that of traditional ELISA. Furthermore, the novel method can be used to detect E. coli O157:H7 in milk (2cfu/g). Therefore, this new signaling strategy will facilitate analyses of highly sensitive foodborne pathogens.
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Affiliation(s)
- Shan Shan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Daofeng Liu
- Jiangxi Province Centers for Disease Control and Prevention, Nanchang 330096, China
| | - Qi Guo
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Songsong Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Rui Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Kai Luo
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Liming Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Weihua Lai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
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