BACKGROUND: Several microdevices have been developed to perform only a single step of a genotyping process, such as PCR or detection by probe hybridization. Here, we describe a Lab-on-Chip (LoC) platform integrating a PCR amplification microreactor with a customable microarray for the detection of sequence variations on human genomic DNA. METHODS: Preliminary work was focused on developing the single analytical steps including PCR and labeling strategies of the amplified product by conventional reference systems. The optimized protocols included a 1:4 forward:reverse primer ratio for asymmetric PCR, and Cy5-dCTP multiple incorporation for the generation of a labeled PCR product to be hybridized to complementary probes bound to the chip surface. RESULTS: Final conditions were applied to the fully integrated LoC platform for the detection of the IVSI-110 G > A mutation in the human beta-globin (HBB) gene associated with beta-thalassemia, used as a model of genetic application, allowing for correct genotyping of 25 samples that were heterozygous, homozygous or wild-type for this mutation. CONCLUSIONS: The overall results show that the present platform is very promising for rapid identification of DNA sequence variations in an integrated, cost effective and convenient silicon chip format.
BACKGROUND: Several microdevices have been developed to perform only a single step of a genotyping process, such as PCR or detection by probe hybridization. Here, we describe a Lab-on-Chip (LoC) platform integrating a PCR amplification microreactor with a customable microarray for the detection of sequence variations on human genomic DNA. METHODS: Preliminary work was focused on developing the single analytical steps including PCR and labeling strategies of the amplified product by conventional reference systems. The optimized protocols included a 1:4 forward:reverse primer ratio for asymmetric PCR, and Cy5-dCTP multiple incorporation for the generation of a labeled PCR product to be hybridized to complementary probes bound to the chip surface. RESULTS: Final conditions were applied to the fully integrated LoC platform for the detection of the IVSI-110 G > A mutation in the humanbeta-globin (HBB) gene associated with beta-thalassemia, used as a model of genetic application, allowing for correct genotyping of 25 samples that were heterozygous, homozygous or wild-type for this mutation. CONCLUSIONS: The overall results show that the present platform is very promising for rapid identification of DNA sequence variations in an integrated, cost effective and convenient silicon chip format.
Authors: Darrell P Chandler; Christopher Knickerbocker; Lexi Bryant; Julia Golova; Cory Wiles; Kenneth H Williams; Aaron D Peacock; Philip E Long Journal: Appl Environ Microbiol Date: 2012-11-16 Impact factor: 4.792
Authors: Konstantinos Mitsakakis; Valérie D'Acremont; Sebastian Hin; Felix von Stetten; Roland Zengerle Journal: Microelectron Eng Date: 2018-10-05 Impact factor: 2.523
Authors: Darrell P Chandler; Lexi Bryant; Sara B Griesemer; Rui Gu; Christopher Knickerbocker; Alexander Kukhtin; Jennifer Parker; Cynthia Zimmerman; Kirsten St George; Christopher G Cooney Journal: Microarrays (Basel) Date: 2012-11-09