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Savini C, Tenti E, Mikus E, Eligini S, Munno M, Gaspardo A, Gianazza E, Greco A, Ghilardi S, Aldini G, Tremoli E, Banfi C. Albumin Thiolation and Oxidative Stress Status in Patients with Aortic Valve Stenosis. Biomolecules 2023; 13:1713. [PMID: 38136584 PMCID: PMC10742097 DOI: 10.3390/biom13121713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/08/2023] [Accepted: 11/24/2023] [Indexed: 12/24/2023] Open
Abstract
Recent evidence indicates that reactive oxygen species play an important causative role in the onset and progression of valvular diseases. Here, we analyzed the oxidative modifications of albumin (HSA) occurring on Cysteine 34 and the antioxidant capacity of the serum in 44 patients with severe aortic stenosis (36 patients underwent aortic valve replacement and 8 underwent a second aortic valve substitution due to a degenerated bioprosthetic valve), and in 10 healthy donors (controls). Before surgical intervention, patients showed an increase in the oxidized form of albumin (HSA-Cys), a decrease in the native reduced form (HSA-SH), and a significant reduction in serum free sulfhydryl groups and in the total serum antioxidant activity. Patients undergoing a second valve replacement showed levels of HSA-Cys, free sulfhydryl groups, and total antioxidant activity similar to those of controls. In vitro incubation of whole blood with aspirin (ASA) significantly increased the free sulfhydryl groups, suggesting that the in vivo treatment with ASA may contribute to reducing oxidative stress. We also found that N-acetylcysteine and its amide derivative were able to regenerate HSA-SH. In conclusion, the systemic oxidative stress reflected by high levels of HSA-Cys is increased in patients with aortic valve stenosis. Thiol-disulfide breaking agents regenerate HSA-SH, thus paving the way to the use these compounds to mitigate the oxidative stress occurring in the disease.
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Affiliation(s)
- Carlo Savini
- GVM Care and Research, Maria Cecilia Hospital, 48033 Cotignola, Italy; (C.S.); (E.T.); (E.M.); (E.T.)
- Dipartimento di Scienze Mediche e Chirurgiche, Alma Mater Studiorum, Università di Bologna, 40126 Bologna, Italy
| | - Elena Tenti
- GVM Care and Research, Maria Cecilia Hospital, 48033 Cotignola, Italy; (C.S.); (E.T.); (E.M.); (E.T.)
| | - Elisa Mikus
- GVM Care and Research, Maria Cecilia Hospital, 48033 Cotignola, Italy; (C.S.); (E.T.); (E.M.); (E.T.)
| | - Sonia Eligini
- Unit of Functional Proteomics, Metabolomics, and Network Analysis, Centro Cardiologico Monzino IRCCS, 20138 Milano, Italy; (S.E.); (M.M.); (A.G.); (E.G.); (A.G.); (S.G.)
| | - Marco Munno
- Unit of Functional Proteomics, Metabolomics, and Network Analysis, Centro Cardiologico Monzino IRCCS, 20138 Milano, Italy; (S.E.); (M.M.); (A.G.); (E.G.); (A.G.); (S.G.)
| | - Anna Gaspardo
- Unit of Functional Proteomics, Metabolomics, and Network Analysis, Centro Cardiologico Monzino IRCCS, 20138 Milano, Italy; (S.E.); (M.M.); (A.G.); (E.G.); (A.G.); (S.G.)
| | - Erica Gianazza
- Unit of Functional Proteomics, Metabolomics, and Network Analysis, Centro Cardiologico Monzino IRCCS, 20138 Milano, Italy; (S.E.); (M.M.); (A.G.); (E.G.); (A.G.); (S.G.)
| | - Arianna Greco
- Unit of Functional Proteomics, Metabolomics, and Network Analysis, Centro Cardiologico Monzino IRCCS, 20138 Milano, Italy; (S.E.); (M.M.); (A.G.); (E.G.); (A.G.); (S.G.)
| | - Stefania Ghilardi
- Unit of Functional Proteomics, Metabolomics, and Network Analysis, Centro Cardiologico Monzino IRCCS, 20138 Milano, Italy; (S.E.); (M.M.); (A.G.); (E.G.); (A.G.); (S.G.)
| | - Giancarlo Aldini
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milano, Italy;
| | - Elena Tremoli
- GVM Care and Research, Maria Cecilia Hospital, 48033 Cotignola, Italy; (C.S.); (E.T.); (E.M.); (E.T.)
| | - Cristina Banfi
- Unit of Functional Proteomics, Metabolomics, and Network Analysis, Centro Cardiologico Monzino IRCCS, 20138 Milano, Italy; (S.E.); (M.M.); (A.G.); (E.G.); (A.G.); (S.G.)
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Chen C, Niu M, Pan J, Du N, Liu S, Li H, He Q, Mao J, Duan Y, Du Y. Bacteroides, butyric acid and t10,c12-CLA changes in colorectal adenomatous polyp patients. Gut Pathog 2021; 13:1. [PMID: 33436066 PMCID: PMC7805033 DOI: 10.1186/s13099-020-00395-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 12/18/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Colorectal adenomatous polyps (CAPs) are considered precancerous lesions of colorectal cancer (CRC). The gut microbiota participates in the process of digestion and, in the process, produces metabolites, mainly short-chain fatty acids (SCFAs), secondary bile acids and conjugated linoleic acid (CLA). This study aimed to investigate the gut microbiota constituents and metabolites in the faeces of CAP patients to identify microbiota or metabolites that can be used as sensitive biological predictors and to provide a theoretical basis for the clinical treatment of CAPs. METHODS 16S rRNA sequence analysis was used to detect microbial changes in the faeces of CAP patients. qPCR analysis was used to evaluate the ability of the microbiota to produce metabolites, and the contents of metabolites in faeces were detected by ion chromatography and ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). RESULTS Based on the detection of the gut microbiota, patients with CAPs had increased abundances of Bacteroides and Citrobacter, and the abundances of Weissella and Lactobacillus were decreased. We also explored gene expression, and the abundance of butyrate-producing bacterial genes was significantly increased in the faeces of CAP patients, but those of secondary bile acid-producing and CLA-producing bacterial genes showed no differences in faecal samples. The acetic acid and butyric acid contents were increased in the faeces of the CAP group, and the healthy control group had higher t10,c12-CLA contents. CONCLUSION The gut microbiota analysis results, assessed in faeces, showed that Bacteroides and Citrobacter were positively correlated with CAPs, which indicated that changes in specific genera might be detrimental to intestinal health. In addition, t10,c12-CLA played an important role in protecting the intestine.
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Affiliation(s)
- Ciyan Chen
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China.,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China.,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China.,Qujing Healthcare Security Administration, Qujing, 655000, China
| | - Min Niu
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China.,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China.,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China
| | - Junxi Pan
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China.,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China.,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China
| | - Na Du
- Department of Clinical Laboratory, the No. 1 Affiliated Hospital of Yunnan University of Chinese Medicine, Kunming, 650032, China
| | - Shumin Liu
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China.,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China.,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China
| | - Huanqin Li
- Department of Clinical Laboratory, the No. 1 Affiliated Hospital of Yunnan University of Chinese Medicine, Kunming, 650032, China
| | - Qiuyue He
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China.,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China.,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China
| | - Jian Mao
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China.,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China.,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China
| | - Yong Duan
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China.,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China.,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China
| | - Yan Du
- Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Wuhua District, Kunming, 650032, China. .,Yunnan Institute of Laboratory Diagnosis, Kunming, 650032, China. .,Yunnan Key Laboratory of Laboratory Medicine, Kunming, 650032, China.
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Luo Z, Ang MJY, Chan SY, Yi Z, Goh YY, Yan S, Tao J, Liu K, Li X, Zhang H, Huang W, Liu X. Combating the Coronavirus Pandemic: Early Detection, Medical Treatment, and a Concerted Effort by the Global Community. RESEARCH (WASHINGTON, D.C.) 2020; 2020:6925296. [PMID: 32607499 PMCID: PMC7315394 DOI: 10.34133/2020/6925296] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 01/08/2023]
Abstract
The World Health Organization (WHO) has declared the outbreak of 2019 novel coronavirus, known as 2019-nCoV, a pandemic, as the coronavirus has now infected over 2.6 million people globally and caused more than 185,000 fatalities as of April 23, 2020. Coronavirus disease 2019 (COVID-19) causes a respiratory illness with symptoms such as dry cough, fever, sudden loss of smell, and, in more severe cases, difficulty breathing. To date, there is no specific vaccine or treatment proven effective against this viral disease. Early and accurate diagnosis of COVID-19 is thus critical to curbing its spread and improving health outcomes. Reverse transcription-polymerase chain reaction (RT-PCR) is commonly used to detect the presence of COVID-19. Other techniques, such as recombinase polymerase amplification (RPA), loop-mediated isothermal amplification (LAMP), clustered regularly interspaced short palindromic repeats (CRISPR), and microfluidics, have allowed better disease diagnosis. Here, as part of the effort to expand screening capacity, we review advances and challenges in the rapid detection of COVID-19 by targeting nucleic acids, antigens, or antibodies. We also summarize potential treatments and vaccines against COVID-19 and discuss ongoing clinical trials of interventions to reduce viral progression.
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Affiliation(s)
- Zichao Luo
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Melgious Jin Yan Ang
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, Singapore 117456, Singapore
| | - Siew Yin Chan
- Frontiers Science Center for Flexible Electronics & Shaanxi Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Zhigao Yi
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Yi Yiing Goh
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, Singapore 117456, Singapore
| | - Shuangqian Yan
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Jun Tao
- Sports Medical Centre, The Second Affiliated Hospital of Nanchang University, Nanchang 330000, China
| | - Kai Liu
- State Key Laboratory of Rare Earth Resource Utilization, Chang Chun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Xiaosong Li
- Department of Oncology, The Fourth Medical Center of Chinese People's Liberation Army General Hospital, Beijing 100048, China
| | - Hongjie Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Chang Chun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics & Shaanxi Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Xiaogang Liu
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
- The N.1 Institute for Health, National University of Singapore, Singapore
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350807, China
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Zhuo XH, Sun HC, Huang B, Yu HJ, Shan Y, Du AF. Evaluation of potential anti-toxoplasmosis efficiency of combined traditional herbs in a mouse model. J Zhejiang Univ Sci B 2018; 18:453-461. [PMID: 28585421 PMCID: PMC5482040 DOI: 10.1631/jzus.b1600316] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Toxoplasma gondii is a worldwide spread protozoan and is able to infect almost all warm-blood animals. No effective drugs are available clinically on toxoplasmosis. Chinese traditional herbal medicines have provided remedies for many health problems. There exists a possibility that Chinese herbs may provide protection against T. gondii. This work aims to assess the protective efficacy of combined Chinese herbs against T. gondii. We screened five herbal medicines that have different pharmacological effects and combined them into a prescription according to the traditional Chinese medicine compatibility principle. The drug potential and protective efficacy were evaluated through a mouse model by determining the survival time, the parasite load in blood and tissues, the change of cell proportions in blood and histological detection. The results showed that the survival time of mice in the 500 mg Chinese herbs group and sulfadiazine group was significantly longer than that of the PBS control group. Also the parasite load in blood and tissues of 500 mg Chinese herbs and sulfadiazine groups was significantly lower than that of PBS group at 7 days post infection (dpi), which was in accordance with the result of histological detection. Monocyte and neutrophil of infected mice were remarkably increased while lymphocyte was dramatically decreased compared to that of blank group at 7 dpi. The results demonstrated that the 500 mg dosage of our Chinese herbs could slow down the replication of T. gondii and prolong the survival time of mice and could be considered as possible candidate drug against toxoplasmosis.
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Affiliation(s)
- Xun-Hui Zhuo
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.,Department of Immunity and Biochemistry, Institute of Parasitic Disease, Zhejiang Academy of Medical Sciences, Hangzhou 310013, China
| | - Hong-Chao Sun
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Bin Huang
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hai-Jie Yu
- Jiaxing Vocational & Technical College, Jiaxing 314000, China
| | - Ying Shan
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ai-Fang Du
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
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Suebsing R, Kampeera J, Sirithammajak S, Pradeep PJ, Jitrakorn S, Arunrut N, Sangsuriya P, Saksmerprome V, Senapin S, Withyachumnarnkul B, Kiatpathomchai W. Shewanella putrefaciens in cultured tilapia detected by a new calcein-loop-mediated isothermal amplification (Ca-LAMP) method. DISEASES OF AQUATIC ORGANISMS 2015; 117:133-143. [PMID: 26648105 DOI: 10.3354/dao02942] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Shewanella putrefaciens is being increasingly isolated from a wide variety of sources and is pathogenic to many marine and freshwater fish. For better control of this pathogen, there is a need for the development of simple and inexpensive but highly specific, sensitive, and rapid detection methods suitable for application in field laboratories. Our colorogenic loop-mediated isothermal amplification (LAMP) assay combined with calcein (Ca-LAMP) for unaided visual confirmation of LAMP amplicons is a simple method for fish pathogen detection in cultured tilapia. Here, we describe the detection of S. putrefaciens using the same platform. As before, the method gave positive results (orange to green color change) in 45 min at 63°C with sensitivity 100 times higher than that of a conventional PCR assay, with no cross-amplification of other known fish bacterial pathogens tested. Using the assay with 389 samples of gonads, fertilized eggs, and fry of farmed Nile and red tilapia Oreochromis spp., 35% of samples were positive for S. putrefaciens. The highest prevalence was found in samples of gonads (55%) and fertilized eggs (55%) from adult breeding stocks, indicating that S. putrefaciens could be passed on easily to fry used for stocking production ponds. Tissue tropism assays revealed that the spleen showed the highest colonization by S. putrefaciens in naturally infected tilapia and that it would be the most suitable organ for screening and monitoring fish stocks for presence of the bacteria.
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Affiliation(s)
- Rungkarn Suebsing
- Bioengineering and Sensing Technology Laboratory, BIOTEC, National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Klong Neung, Klong Luang, Pathum Thani 12120, Thailand
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Zhang H, Zheng B, Gao R, Feng Y. Binding of Shewanella FadR to the fabA fatty acid biosynthetic gene: implications for contraction of the fad regulon. Protein Cell 2015; 6:667-679. [PMID: 26050090 PMCID: PMC4537474 DOI: 10.1007/s13238-015-0172-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 05/06/2015] [Indexed: 11/25/2022] Open
Abstract
The Escherichia coli fadR protein product, a paradigm/prototypical FadR regulator, positively regulates fabA and fabB, the two critical genes for unsaturated fatty acid (UFA) biosynthesis. However the scenario in the other Ɣ-proteobacteria, such as Shewanella with the marine origin, is unusual in that Rodionov and coworkers predicted that only fabA (not fabB) has a binding site for FadR protein. It raised the possibility of fad regulon contraction. Here we report that this is the case. Sequence alignment of the FadR homologs revealed that the N-terminal DNA-binding domain exhibited remarkable similarity, whereas the ligand-accepting motif at C-terminus is relatively-less conserved. The FadR homologue of S. oneidensis (referred to FadR_she) was over-expressed and purified to homogeneity. Integrative evidence obtained by FPLC (fast protein liquid chromatography) and chemical cross-linking analyses elucidated that FadR_she protein can dimerize in solution, whose identity was determined by MALDI-TOF-MS. In vitro data from electrophoretic mobility shift assays suggested that FadR_she is almost functionally-exchangeable/equivalent to E. coli FadR (FadR_ec) in the ability of binding the E. coli fabA (and fabB) promoters. In an agreement with that of E. coli fabA, S. oneidensis fabA promoter bound both FadR_she and FadR_ec, and was disassociated specifically with the FadR regulatory protein upon the addition of long-chain acyl-CoA thioesters. To monitor in vivo effect exerted by FadR on Shewanella fabA expression, the native promoter of S. oneidensis fabA was fused to a LacZ reporter gene to engineer a chromosome fabA-lacZ transcriptional fusion in E. coli. As anticipated, the removal of fadR gene gave about 2-fold decrement of Shewanella fabA expression by β-gal activity, which is almost identical to the inhibitory level by the addition of oleate. Therefore, we concluded that fabA is contracted to be the only one member of fad regulon in the context of fatty acid synthesis in the marine bacteria Shewanella genus.
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Affiliation(s)
- Huimin Zhang
- Department of Medical Microbiology & Parasitology, Zhejiang University School of Medicine, Hangzhou, 310058 China
| | - Beiwen Zheng
- Department of Medical Microbiology & Parasitology, Zhejiang University School of Medicine, Hangzhou, 310058 China.,State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University School of Medicine, Hangzhou, 310058 China
| | - Rongsui Gao
- Department of Medical Microbiology & Parasitology, Zhejiang University School of Medicine, Hangzhou, 310058 China
| | - Youjun Feng
- Department of Medical Microbiology & Parasitology, Zhejiang University School of Medicine, Hangzhou, 310058 China.,State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University School of Medicine, Hangzhou, 310058 China
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Zhuo X, Huang B, Luo J, Yu H, Yan B, Yang Y, Du A. Development and application of loop-mediated isothermal amplification assays based on ITS-1 for rapid detection of Toxoplasma gondii in pork. Vet Parasitol 2015; 208:246-9. [PMID: 25624074 DOI: 10.1016/j.vetpar.2015.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 12/29/2014] [Accepted: 01/08/2015] [Indexed: 11/19/2022]
Abstract
The loop-mediated isothermal amplification (LAMP) assay is a novel method that rapidly amplifies DNA with high specificity and sensitivity under isothermal conditions. In this study, we established a LAMP assay with six primers targeting a highly conserved region of Toxoplasma gondii ITS-1 sequence. The amplification protocol completes within 30 min under isothermal condition in a 65°C water bath while specificity tests confirmed no cross-reactivity with DNA templates of Neospora caninum, Eimeria tenella, Cryptosporidium parvum, Listeria monocytogenes and Streptococcus suis. The detection limit of the LAMP assay was 0.9 fg T. gondii genomic DNA, a sensitivity that was 10-fold higher than that of a conventional PCR assay. Both LAMP assay and conventional PCR were applied to detect T. gondii genomic DNA in 118 diaphragm samples obtained from pig farms in Zhejiang Province, China. Our results showed that the LAMP assay is more sensitive than conventional PCR (13.56% and 9.32%). The LAMP assay established in this study provides a simple, specific, sensitive and rapid method of T. gondii genomic DNA detection, hence is expected to plays an important role in the monitoring of T. gondii contamination in various food products.
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Affiliation(s)
- Xunhui Zhuo
- Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Bin Huang
- Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Jiaqing Luo
- Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Haijie Yu
- Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Baolong Yan
- Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yi Yang
- Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Aifang Du
- Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China.
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Niessen L, Luo J, Denschlag C, Vogel RF. The application of loop-mediated isothermal amplification (LAMP) in food testing for bacterial pathogens and fungal contaminants. Food Microbiol 2013; 36:191-206. [DOI: 10.1016/j.fm.2013.04.017] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 04/23/2013] [Accepted: 04/25/2013] [Indexed: 10/26/2022]
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9
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Focke F, Haase I, Fischer M. Loop-mediated isothermal amplification (LAMP): methods for plant species identification in food. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:2943-2949. [PMID: 23432417 DOI: 10.1021/jf304295b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Loop-mediated isothermal amplification (LAMP) is a DNA-based analytical method that can be used as an isothermal alternative to polymerase chain reaction (PCR). In comparison to PCR, the advantage of LAMP is the possibility to perform the isothermal reaction without any sophisticated technical equipment; only a water bath is needed, and naked eye detection is sufficient. Up to now, an application of LAMP methods for the detection of even closely related plant species in food or feed matrices has not been described, whereas a large number of PCR methods for that topic are cited in the literature. The aim of the study was the evaluation of LAMP-based methods for plant species identification with respect to method parameters such as R(2), LOD, and LOQ. An existing (real-time) PCR method (for the detection of spices) was used for comparison. It could be shown that the developed LAMP methods have potential as alternative strategies to PCR in DNA-based analysis.
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Affiliation(s)
- Felix Focke
- Hamburg School of Food Science, Institute of Food Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
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