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Comparison of amplicon-sequencing, pyrosequencing and real-time PCR for detection of YMDD mutants in patients with chronic hepatitis B
R5; AIM: To compare the sequencing of PCR products, pyrosequencing, and real-time PCR for detection of Tyrosinemethionine-aspartate-aspartate (YMDD) mutants in patients with chronic hepatitis B.METHODS: Mixtures of plasmids and serum samples from 69 chronic hepatitis B patients treated with lamivudi...
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Published in: | 世界胃肠病学杂志(英文版) 2006, Vol.14 (44), p.7192-7196 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | R5; AIM: To compare the sequencing of PCR products, pyrosequencing, and real-time PCR for detection of Tyrosinemethionine-aspartate-aspartate (YMDD) mutants in patients with chronic hepatitis B.METHODS: Mixtures of plasmids and serum samples from 69 chronic hepatitis B patients treated with lamivudine were tested for YMDD mutations by sequencing of PCR products, pyrosequencing, and real-time PCR, respectively. Time required and reagent costs of the three assays were evaluated.RESULTS: Real-time PCR detected 100%, 50%, 10%,1% and 0.1% of YVDD plasmid in mixtures with 106 copies/mL of YMDD plasmid, whereas sequencing and pyrosequencing only detected 100% and 50% of YVDD plasmid in aliquots of the corresponding mixtures. Completely concordant results were obtained from 60 (87%)out of the 69 clinical serum samples by the three assays.Mutants were detected by real-time PCR in less than 20% of the total virus population, but no mutant was detected by sequencing and pyrosequencing. In addition,real-time PCR required less time and was more cost-effective than the other two assays. However, throughput of pyrosequencing was the highest.CONCLUSION: Among the three assays compared,real-time PCR is the most sensitive, cost-effective, and time saving for monitoring YMDD mutants in patients with chronic hepatitis B on lamivudine therapy. |
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ISSN: | 1007-9327 2219-2840 |