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Saifuddin SA, Rashid R, Nor Azmi NJ, Mohamad S. Colorimetric strategies applicable for loop-mediated isothermal amplification. J Microbiol Methods 2024; 223:106981. [PMID: 38945305 DOI: 10.1016/j.mimet.2024.106981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 05/20/2024] [Accepted: 06/25/2024] [Indexed: 07/02/2024]
Abstract
In recent years, loop-mediated isothermal amplification (LAMP) has gained popularity for detecting various pathogen-specific genes due to its superior sensitivity and specificity compared to conventional polymerase chain reaction (PCR). The simplicity and flexibility of naked-eye detection of the amplicon make LAMP an ideal rapid and straightforward diagnostic tool, especially in resource-limited laboratories. Colorimetric detection is one of the simplest and most straightforward among all detection methods. This review will explore various colorimetric dyes used in LAMP techniques, examining their reaction mechanisms, advantages, limitations and latest applications.
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Affiliation(s)
- Syaidatul Akmal Saifuddin
- School of Dental Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Roslina Rashid
- School of Dental Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Nurin Jazlina Nor Azmi
- School of Dental Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Suharni Mohamad
- School of Dental Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia.
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Xiao F, Fu J, Huang X, Jia N, Sun C, Xu Z, Huang H, Zhou J, Wang Y. Loop-mediated isothermal amplification coupled with nanoparticle-based lateral flow biosensor for monkeypox virus detection. Talanta 2024; 269:125502. [PMID: 38070288 DOI: 10.1016/j.talanta.2023.125502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 11/26/2023] [Accepted: 11/28/2023] [Indexed: 01/05/2024]
Abstract
Monkeypox virus (MPXV) infection is currently an evolving public health concern, highlighting an urgent need for early and rapid detection of MPXV. Here, we present a diagnostic test called MPXV-LAMP-LFB, which combines loop-mediated isothermal amplification (LAMP) and nanoparticle-based lateral flow biosensor (LFB) for the simple, sensitive and specific detection of MPXV and differentiation of its two clades. The MPXV-LAMP-LFB can be conducted at a heating block and the detection results can be visually indicated with the biosensor without any specialized apparatus. Two sets of LAMP primers targeting the D14L and ATI genes were designed for the Central and West African MPXV isolates, respectively. The optimal amplification condition was 64 °C for 40 min. Thus, the MPXV-LAMP-LFB test can be completed within 1 h, incorporating rapid DNA extraction (∼15 min), LAMP reaction (∼40 min) and result indicating (∼5 min). The MPXV-LAMP-LFB assay could detect down to 5 copies of plasmid template and 12.5 copies of pseudotyped virus in simulated blood samples. Furthermore, the MPXV-LAMP-LFB assay correctly identified all the positive controls and successfully avoided cross-reactivity with the non-MPXV pathogens or clinical samples, demonstrating its high specificity. Overall, the MPXV-LAMP-LFB test developed in this study showed great promise as a rapid, sensitive and accurate molecular tool for diagnosing MPXV infection.
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Affiliation(s)
- Fei Xiao
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China
| | - Jin Fu
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China
| | - Xiaolan Huang
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China
| | - Nan Jia
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China
| | - Chunrong Sun
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China
| | - Zheng Xu
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China
| | - Hui Huang
- Department of Infectious Diseases, Affiliated Children's Hospital, Capital Institute of Pediatrics, Beijing, 10020, PR China.
| | - Juan Zhou
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China.
| | - Yi Wang
- Experimental research center, Capital Institute of pediatrics, Beijing, 100020, PR China.
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Li M, Jin X, Jiang Q, Wei H, Deng A, Mao Z, Wang Y, Zeng Z, Wu Y, Liu S, Kim J, Wang X, Liu Y, Liu J, Lv W, Huang L, Liao Q, Huang G, Zhang L. Loop-Mediated Isothermal Amplification (LAMP): Potential Point-of-Care Testing for Vulvovaginal Candidiasis. J Fungi (Basel) 2023; 9:1159. [PMID: 38132760 PMCID: PMC10744362 DOI: 10.3390/jof9121159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/24/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023] Open
Abstract
PURPOSE The aim of this study is to establish a loop-mediated isothermal amplification (LAMP) method for the rapid detection of vulvovaginal candidiasis (VVC). METHODS We developed and validated a loop-mediated isothermal amplification (LAMP) method for detecting the most common Candida species associated with VVC, including C. albicans, N. glabratus, C. tropicalis, and C. parapsilosis. We evaluated the specificity, sensitivity, positive predictive value (PPV), negative predictive value (NPV), and Kappa value of the LAMP method to detect different Candida species, using the conventional culture method and internal transcribed spacer (ITS) sequencing as gold standards and smear Gram staining and real-time Rolymerase Chain Reaction (PCR) as controls. RESULTS A total of 202 cases were enrolled, of which 88 were VVC-positive and 114 were negative. Among the 88 positive patients, the fungal culture and ITS sequencing results showed that 67 cases (76.14%) were associated with C. albicans, 13 (14.77%) with N. glabratus, 5 (5.68%) with C. tropicalis, and 3 (3.41%) with other species. Regarding the overall detection rate, the LAMP method presented sensitivity, specificity, PPV, NPV, and Kappa values of 90.91%, 100%, 100%, 93.4%, and 0.919, respectively. Moreover, the LAMP had a specificity of 100% for C. albicans, N. glabratus, and C. tropicalis, with a sensitivity of 94.03%, 100%, and 80%, respectively. Moreover, the microscopy evaluation had the highest sensitivity, while the real-time PCR was less specific for C. albicans than LAMP. In addition, CHROMagar Candida was inferior to LAMP in detecting non-albicans Candida (NAC) species. CONCLUSIONS Based on the cost-effective, rapid, and inexpensive characteristics of LAMP, coupled with the high sensitivity and specificity of our VVC-associated Candida detection method, we provided a possibility for the point-of-care testing (POCT) of VVC, especially in developing countries and some laboratories with limited resources.
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Affiliation(s)
- Meng Li
- School of Clinical Medicine, Tsinghua University, Beijing 100084, China; (M.L.)
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Xiangyu Jin
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China; (X.J.)
| | - Qingyun Jiang
- School of Clinical Medicine, Tsinghua University, Beijing 100084, China; (M.L.)
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Hongbo Wei
- Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China
| | - Anni Deng
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China; (X.J.)
| | - Zeyin Mao
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China; (X.J.)
| | - Ying Wang
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Zhen Zeng
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Yifan Wu
- School of Clinical Medicine, Tsinghua University, Beijing 100084, China; (M.L.)
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Shuai Liu
- School of Clinical Medicine, Tsinghua University, Beijing 100084, China; (M.L.)
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Juhyun Kim
- School of Clinical Medicine, Tsinghua University, Beijing 100084, China; (M.L.)
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Xiaoqian Wang
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Ying Liu
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Jun Liu
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Wenqi Lv
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China; (X.J.)
| | - Leyang Huang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China; (X.J.)
| | - Qinping Liao
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Guoliang Huang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China; (X.J.)
| | - Lei Zhang
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
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Lorenzo-Villegas DL, Gohil NV, Lamo P, Gurajala S, Bagiu IC, Vulcanescu DD, Horhat FG, Sorop VB, Diaconu M, Sorop MI, Oprisoni A, Horhat RM, Susan M, MohanaSundaram A. Innovative Biosensing Approaches for Swift Identification of Candida Species, Intrusive Pathogenic Organisms. Life (Basel) 2023; 13:2099. [PMID: 37895480 PMCID: PMC10608220 DOI: 10.3390/life13102099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/17/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023] Open
Abstract
Candida is the largest genus of medically significant fungi. Although most of its members are commensals, residing harmlessly in human bodies, some are opportunistic and dangerously invasive. These have the ability to cause severe nosocomial candidiasis and candidemia that affect the viscera and bloodstream. A prompt diagnosis will lead to a successful treatment modality. The smart solution of biosensing technologies for rapid and precise detection of Candida species has made remarkable progress. The development of point-of-care (POC) biosensor devices involves sensor precision down to pico-/femtogram level, cost-effectiveness, portability, rapidity, and user-friendliness. However, futuristic diagnostics will depend on exploiting technologies such as multiplexing for high-throughput screening, CRISPR, artificial intelligence (AI), neural networks, the Internet of Things (IoT), and cloud computing of medical databases. This review gives an insight into different biosensor technologies designed for the detection of medically significant Candida species, especially Candida albicans and C. auris, and their applications in the medical setting.
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Affiliation(s)
| | - Namra Vinay Gohil
- Department of Internal Medicne, Medical College Baroda, Vadodara 390001, India;
- Department of Internal Medicne, SSG Hospital Vadodara, Gotri, Vadodara 390021, India
| | - Paula Lamo
- Escuela Superior de Ingeniería y Tecnología, Universidad Internacional de La Rioja, 26006 Logroño, Spain;
| | - Swathi Gurajala
- College of Applied Medical Sciences in Jubail, Imam Abdulrahman bin Faisal University, Dammam 31441, Saudi Arabia;
| | - Iulia Cristina Bagiu
- Department of Microbiology, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania; (D.D.V.); (F.G.H.)
- Multidisciplinary Research Center on Antimicrobial Resistance (MULTI-REZ), Microbiology Department, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania
| | - Dan Dumitru Vulcanescu
- Department of Microbiology, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania; (D.D.V.); (F.G.H.)
- Multidisciplinary Research Center on Antimicrobial Resistance (MULTI-REZ), Microbiology Department, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania
| | - Florin George Horhat
- Department of Microbiology, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania; (D.D.V.); (F.G.H.)
- Multidisciplinary Research Center on Antimicrobial Resistance (MULTI-REZ), Microbiology Department, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania
| | - Virgiliu Bogdan Sorop
- Department of Obstetrics and Gynecology, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square, No. 2, 300041 Timisoara, Romania; (V.B.S.); (M.D.)
| | - Mircea Diaconu
- Department of Obstetrics and Gynecology, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square, No. 2, 300041 Timisoara, Romania; (V.B.S.); (M.D.)
| | - Madalina Ioana Sorop
- Doctoral School, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania;
| | - Andrada Oprisoni
- Department of Pediatrics, Discipline of Pediatric Oncology and Hematology, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square, No. 2, 300041 Timisoara, Romania;
| | - Razvan Mihai Horhat
- Department of Conservative Dentistry and Endodontics, Faculty of Dental Medicine, “Victor Babes” University of Medicine and Pharmacy Timisoara, Eftimie Murgu Square 2, 300041 Timisoara, Romania;
| | - Monica Susan
- Centre for Preventive Medicine, Department of Internal Medicine, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square, No. 2, 300041 Timisoara, Romania;
| | - ArunSundar MohanaSundaram
- School of Pharmacy, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai 600119, India;
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