TY - JOUR
T1 - A microfluidic system integrated with buried optical fibers for detection of Phalaenopsis orchid pathogens
AU - Lin, Chih Lin
AU - Chang, Wen Hsin
AU - Wang, Chih Hung
AU - Lee, Chia Hwa
AU - Chen, Tzong Yueh
AU - Jan, Fuh Jyh
AU - Lee, Gwo Bin
N1 - Funding Information:
The authors would like to thank the Council for Agriculture in Taiwan for their financial support of this project ( 101AS-5.3.1-ST-aL ). Partial financial support was also provided by the National Science Council Taiwan ( NSC 102-2218-E-007-001 ), the “Towards A World-Class University Project " ( 103N2048E1 ) and the Hsinchu Science Park Bureau, Ministry of Science and Technology ( 103A03 ).
PY - 2015/1/15
Y1 - 2015/1/15
N2 - Orchids of the genus Phalaenopsis are some of the most economically important plants in Taiwan. Fast, accurate, and on-site detection of pathogens in these orchids is therefore of critical importance in order to prevent or suppress costly disease outbreaks. Traditional pathogen detection methods are time-consuming, require well-equipped laboratories with highly trained personnel, and cannot be conducted in situ. In this study, a microfluidic system integrated with buried optical fibers was developed to detect viral pathogens of Phalaenopsis spp. Briefly, virus-specific ribonucleic acid (RNA) purification was achieved by a pre-treatment incubation with magnetic beads, and reverse-transcription loop-mediated isothermal amplification (RT-LAMP) was used subsequently to amplify the viral RNA. Positive RT-LAMP reactions resulted in the precipitation of magnesium pyrophosphate, which caused a change in turbidity that could be seen by the naked eye. A buried optical fiber-based detection module and a micro-stirring device were then integrated into the microfluidic chip to detect the RT-LAMP reaction product directly on the chip itself by measuring the change in the optical signals caused by the turbidity change associated with a positive amplification. The limit of detection for this system was found to be 25. fg, which is of similar sensitivity to existing, more laborious methods. Therefore, by using the integrated microfluidic system, a sensitive, rapid, accurate, and automatic diagnosis of viral pathogens in Phalaenopsis spp. orchids could be achieved within only 65. min. could be diagnosed in less than 65min.
AB - Orchids of the genus Phalaenopsis are some of the most economically important plants in Taiwan. Fast, accurate, and on-site detection of pathogens in these orchids is therefore of critical importance in order to prevent or suppress costly disease outbreaks. Traditional pathogen detection methods are time-consuming, require well-equipped laboratories with highly trained personnel, and cannot be conducted in situ. In this study, a microfluidic system integrated with buried optical fibers was developed to detect viral pathogens of Phalaenopsis spp. Briefly, virus-specific ribonucleic acid (RNA) purification was achieved by a pre-treatment incubation with magnetic beads, and reverse-transcription loop-mediated isothermal amplification (RT-LAMP) was used subsequently to amplify the viral RNA. Positive RT-LAMP reactions resulted in the precipitation of magnesium pyrophosphate, which caused a change in turbidity that could be seen by the naked eye. A buried optical fiber-based detection module and a micro-stirring device were then integrated into the microfluidic chip to detect the RT-LAMP reaction product directly on the chip itself by measuring the change in the optical signals caused by the turbidity change associated with a positive amplification. The limit of detection for this system was found to be 25. fg, which is of similar sensitivity to existing, more laborious methods. Therefore, by using the integrated microfluidic system, a sensitive, rapid, accurate, and automatic diagnosis of viral pathogens in Phalaenopsis spp. orchids could be achieved within only 65. min. could be diagnosed in less than 65min.
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U2 - 10.1016/j.bios.2014.08.013
DO - 10.1016/j.bios.2014.08.013
M3 - Article
C2 - 25168766
AN - SCOPUS:84907300029
VL - 63
SP - 572
EP - 579
JO - Biosensors and Bioelectronics
JF - Biosensors and Bioelectronics
SN - 0956-5663
ER -