scholarly journals A signal-flexible gene diagnostic strategy coupling loop-mediated isothermal amplification with hybridization chain reaction

2019 ◽  
Vol 1079 ◽  
pp. 171-179 ◽  
Author(s):  
Qing Dong ◽  
Quanyi Liu ◽  
Lulu Guo ◽  
Dan Li ◽  
Xudong Shang ◽  
...  
Keyword(s):  
Isothermal Amplification ◽  
Hybridization Chain Reaction ◽  
Diagnostic Strategy ◽  
Chain Reaction ◽  
Loop Mediated Isothermal Amplification ◽  
Coupling Loop

scholarly journals Loop-Mediated Isothermal Amplification (LAMP) as a Promising Point-of-Care Diagnostic Strategy in Avian Virus Research

Animals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 76
Author(s):  
Faiz Padzil ◽  
Abdul Razak Mariatulqabtiah ◽  
Wen Siang Tan ◽  
Kok Lian Ho ◽  
Nurulfiza Mat Isa ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Nucleic Acid ◽  
Point Of Care ◽  
Rolling Circle Amplification ◽  
Isothermal Amplification ◽  
Screening Methods ◽  
Diagnostic Strategy ◽  
Chain Reaction ◽  
Loop Mediated Isothermal Amplification ◽  
Polymerase Chain

Over the years, development of molecular diagnostics has evolved significantly in the detection of pathogens within humans and their surroundings. Researchers have discovered new species and strains of viruses, while mitigating the viral infections that occur, owing to the accessibility of nucleic acid screening methods such as polymerase chain reaction (PCR), qualitative (real-time) polymerase chain reaction (qPCR) and reverse-transcription qPCR (RT-qPCR). While such molecular detection methods are widely utilized as the benchmark, the invention of isothermal amplifications has also emerged as a reliable tool to improvise on-field diagnosis without dependence on thermocyclers. Among the established isothermal amplification technologies are loop-mediated isothermal amplification (LAMP), recombinant polymerase amplification (RPA), strand displacement activity (SDA), nucleic acid sequence-based amplification (NASBA), helicase-dependent amplification (HDA) and rolling circle amplification (RCA). This review highlights the past research on and future prospects of LAMP, its principles and applications as a promising point-of-care diagnostic method against avian viruses.

scholarly journals LOOP-MEDIATED ISOTHERMAL AMPLIFICATION FOR DETECTION OF C. BURNETII IN BULGARIA

2021 ◽  
Vol 19 (2) ◽  
pp. 147-151
Author(s):  
M. Kunchev ◽  
V. Belcheva ◽  
E. Grigorov
Keyword(s):  
Polymerase Chain Reaction ◽  
Sensitivity And Specificity ◽  
Q Fever ◽  
High Sensitivity ◽  
Isothermal Amplification ◽  
Chain Reaction ◽  
Retrospective Diagnosis ◽  
Loop Mediated Isothermal Amplification ◽  
The World ◽  
Polymerase Chain

Q fever, which is caused by Coxiella burnetii, a small, pleomorphic intracellular bacterium, is the most widespread zoonosis in the world. The chronic form of the disease can lead to disability and death. Rapid diagnosis of Q fever is needed in order that effective treatment can be initiated. The conventional retrospective diagnosis of Q fever, based on serology, is useless for the treatment of afflicted patients. Thus, molecular methods have been created to close the diagnostic gap between the onset of the disease and the presence of specific antibodies in serum. A polymerase chain reaction is a suitable and reliable method with high sensitivity and specificity, but it requires expensive equipment and post-amplification protocol. Loop-mediated isothermal amplification (LAMP) is an isothermal technique, conducted at constant temperature that can amplify a negligible amount of DNA to more than 109 copies within one hour, using special primers and polymerase. We have tested the sensitivity and specificity of LAMP in the detection of C. burnetii. The mean positive rate of LAMP and polymerase chain reaction in patients was 100% and 74%, respectively. LAMP reacted negatively with non-C. burnetii pathogens and non-infected blood samples. We conclude that LAMP is a sensitive and specific technique for the detection of C. burnetii and has advantages over serological methods and PCR that make it attractive for diagnosing Q fever in countries around the world.

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