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Basic Characteristics of Mutations
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Mutation Site
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E35D |
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Mutation Site Sentence
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In the protease region, the following accessory mutations including E35D, M36I, R41K, D60E, L63P and I93L were detected in all the patients. |
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Mutation Level
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Amino acid level |
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Mutation Type
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Nonsynonymous substitution |
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Gene/Protein/Region
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PR |
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Standardized Encoding Gene
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gag-pol
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Genotype/Subtype
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HIV-1 |
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Viral Reference
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-
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Functional Impact and Mechanisms
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Disease
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HIV Infections
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Immune
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- |
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Target Gene
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-
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Clinical and Epidemiological Correlations
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Clinical Information
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Y |
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Treatment
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- |
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Location
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Taiwan(China) |
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Literature Information
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PMID
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28107423
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Title
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Characterization of the Drug Resistance Profiles of Patients Infected with CRF07_BC Using Phenotypic Assay and Ultra-Deep Pyrosequencing
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Author
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Huang SW,Li WY,Wang WH,Lin YT,Chou CH,Chen M,Huang HD,Chen YH,Lu PL,Wang SF,Oka S,Chen YA
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Journal
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PloS one
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Journal Info
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2017 Jan 20;12(1):e0170420
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Abstract
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The usefulness of ultra-deep pyrosequencing (UDPS) for the diagnosis of HIV-1 drug resistance (DR) remains to be determined. Previously, we reported an explosive outbreak of HIV-1 circulating recombinant form (CRF) 07_BC among injection drug users (IDUs) in Taiwan in 2004. The goal of this study was to characterize the DR of CRF07_BC strains using different assays including UDPS. Seven CRF07_BC isolates including 4 from early epidemic (collected in 2004-2005) and 3 from late epidemic (collected in 2008) were obtained from treatment-naive patient's peripheral blood mononuclear cells. Viral RNA was extracted directly from patient's plasma or from cultural supernatant and the pol sequences were determined using RT-PCR sequencing or UDPS. For comparison, phenotypic drug susceptibility assay using MAGIC-5 cells (in-house phenotypic assay) and Antivirogram were performed. In-house phenotypic assay showed that all the early epidemic and none of the late epidemic CRF07_BC isolates were resistant to most protease inhibitors (PIs) (4.4-47.3 fold). Neither genotypic assay nor Antivirogram detected any DR mutations. UDPS showed that early epidemic isolates contained 0.01-0.08% of PI DR major mutations. Furthermore, the combinations of major and accessory PI DR mutations significantly correlated with the phenotypic DR. The in-house phenotypic assay is superior to other conventional phenotypic assays in the detection of DR variants with a frequency as low as 0.01%.
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Sequence Data
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-
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