Emergence of telaprevir-resistant variants detected by ultra-deep sequencing after triple therapy in patients infected with HCV genotype 1

Using ultra‐deep sequencing technology, the present was designed to investigate whether the emergence of telaprevir‐resistant variants (amino acid substitutions of aa36, aa54, aa155, aa156, and aa170 positions in HCV NS3 region) after commencement of triple therapy of telaprevir/peginterferon (PEG‐I...

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Veröffentlicht in:Journal of medical virology 2013-06, Vol.85 (6), p.1028-1036
Hauptverfasser: Akuta, Norio, Suzuki, Fumitaka, Seko, Yuya, Kawamura, Yusuke, Sezaki, Hitomi, Suzuki, Yoshiyuki, Hosaka, Tetsuya, Kobayashi, Masahiro, Hara, Tasuku, Kobayashi, Mariko, Saitoh, Satoshi, Arase, Yasuji, Ikeda, Kenji, Kumada, Hiromitsu
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container_issue 6
container_start_page 1028
container_title Journal of medical virology
container_volume 85
creator Akuta, Norio
Suzuki, Fumitaka
Seko, Yuya
Kawamura, Yusuke
Sezaki, Hitomi
Suzuki, Yoshiyuki
Hosaka, Tetsuya
Kobayashi, Masahiro
Hara, Tasuku
Kobayashi, Mariko
Saitoh, Satoshi
Arase, Yasuji
Ikeda, Kenji
Kumada, Hiromitsu
description Using ultra‐deep sequencing technology, the present was designed to investigate whether the emergence of telaprevir‐resistant variants (amino acid substitutions of aa36, aa54, aa155, aa156, and aa170 positions in HCV NS3 region) after commencement of triple therapy of telaprevir/peginterferon (PEG‐IFN)/ribavirin could be predicted at baseline in previous non‐responders to dual therapy. Fourteen patients infected with HCV genotype 1 who did not respond to previous PEG‐IFN/ribavirin, received a 24‐week regimen of triple therapy, and were evaluated for appearance of telaprevir‐resistant variants (amino acid substitutions of more than 0.2% among the total coverage) by ultra‐deep sequencing. The sustained virological response rate was 28.6% (4 of 14 patients), which was significantly higher in patients with Arg70 (substitution at core aa70) and partial response (type of previous response to PEG‐IFN/ribavirin) than in other patients. Telaprevir‐resistant variants at baseline were detected in 7.1% (1 of 14 patients) by direct sequencing and in 21.4% (3 of 14 patients) by ultra‐deep sequencing. The appearance of telaprevir‐resistant variants was examined by ultra‐deep sequencing in 10 who did not show sustained virological responders. De novo variants emerged at re‐elevation of viral load, regardless of variant frequencies at baseline (one patient with very high frequency variants [T54S: 99.9%], two patients with very low frequency variants [V36A: 0.2%; and V170A: 0.4%], and seven patients of undetectable variants). It is concluded that it is difficult to predict at baseline the emergence of telaprevir‐resistant variants after commencement of triple therapy in prior non‐responders of HCV genotype 1, even with the use of ultra‐deep sequencing. J. Med. Virol. 85: 1028–1036, 2013. © 2013 Wiley Periodicals, Inc.
doi_str_mv 10.1002/jmv.23579
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Fourteen patients infected with HCV genotype 1 who did not respond to previous PEG‐IFN/ribavirin, received a 24‐week regimen of triple therapy, and were evaluated for appearance of telaprevir‐resistant variants (amino acid substitutions of more than 0.2% among the total coverage) by ultra‐deep sequencing. The sustained virological response rate was 28.6% (4 of 14 patients), which was significantly higher in patients with Arg70 (substitution at core aa70) and partial response (type of previous response to PEG‐IFN/ribavirin) than in other patients. Telaprevir‐resistant variants at baseline were detected in 7.1% (1 of 14 patients) by direct sequencing and in 21.4% (3 of 14 patients) by ultra‐deep sequencing. The appearance of telaprevir‐resistant variants was examined by ultra‐deep sequencing in 10 who did not show sustained virological responders. De novo variants emerged at re‐elevation of viral load, regardless of variant frequencies at baseline (one patient with very high frequency variants [T54S: 99.9%], two patients with very low frequency variants [V36A: 0.2%; and V170A: 0.4%], and seven patients of undetectable variants). It is concluded that it is difficult to predict at baseline the emergence of telaprevir‐resistant variants after commencement of triple therapy in prior non‐responders of HCV genotype 1, even with the use of ultra‐deep sequencing. J. Med. 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Med. Virol</addtitle><description>Using ultra‐deep sequencing technology, the present was designed to investigate whether the emergence of telaprevir‐resistant variants (amino acid substitutions of aa36, aa54, aa155, aa156, and aa170 positions in HCV NS3 region) after commencement of triple therapy of telaprevir/peginterferon (PEG‐IFN)/ribavirin could be predicted at baseline in previous non‐responders to dual therapy. Fourteen patients infected with HCV genotype 1 who did not respond to previous PEG‐IFN/ribavirin, received a 24‐week regimen of triple therapy, and were evaluated for appearance of telaprevir‐resistant variants (amino acid substitutions of more than 0.2% among the total coverage) by ultra‐deep sequencing. The sustained virological response rate was 28.6% (4 of 14 patients), which was significantly higher in patients with Arg70 (substitution at core aa70) and partial response (type of previous response to PEG‐IFN/ribavirin) than in other patients. Telaprevir‐resistant variants at baseline were detected in 7.1% (1 of 14 patients) by direct sequencing and in 21.4% (3 of 14 patients) by ultra‐deep sequencing. The appearance of telaprevir‐resistant variants was examined by ultra‐deep sequencing in 10 who did not show sustained virological responders. De novo variants emerged at re‐elevation of viral load, regardless of variant frequencies at baseline (one patient with very high frequency variants [T54S: 99.9%], two patients with very low frequency variants [V36A: 0.2%; and V170A: 0.4%], and seven patients of undetectable variants). It is concluded that it is difficult to predict at baseline the emergence of telaprevir‐resistant variants after commencement of triple therapy in prior non‐responders of HCV genotype 1, even with the use of ultra‐deep sequencing. J. Med. 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Med. Virol</addtitle><date>2013-06</date><risdate>2013</risdate><volume>85</volume><issue>6</issue><spage>1028</spage><epage>1036</epage><pages>1028-1036</pages><issn>0146-6615</issn><eissn>1096-9071</eissn><coden>JMVIDB</coden><abstract>Using ultra‐deep sequencing technology, the present was designed to investigate whether the emergence of telaprevir‐resistant variants (amino acid substitutions of aa36, aa54, aa155, aa156, and aa170 positions in HCV NS3 region) after commencement of triple therapy of telaprevir/peginterferon (PEG‐IFN)/ribavirin could be predicted at baseline in previous non‐responders to dual therapy. Fourteen patients infected with HCV genotype 1 who did not respond to previous PEG‐IFN/ribavirin, received a 24‐week regimen of triple therapy, and were evaluated for appearance of telaprevir‐resistant variants (amino acid substitutions of more than 0.2% among the total coverage) by ultra‐deep sequencing. The sustained virological response rate was 28.6% (4 of 14 patients), which was significantly higher in patients with Arg70 (substitution at core aa70) and partial response (type of previous response to PEG‐IFN/ribavirin) than in other patients. Telaprevir‐resistant variants at baseline were detected in 7.1% (1 of 14 patients) by direct sequencing and in 21.4% (3 of 14 patients) by ultra‐deep sequencing. The appearance of telaprevir‐resistant variants was examined by ultra‐deep sequencing in 10 who did not show sustained virological responders. De novo variants emerged at re‐elevation of viral load, regardless of variant frequencies at baseline (one patient with very high frequency variants [T54S: 99.9%], two patients with very low frequency variants [V36A: 0.2%; and V170A: 0.4%], and seven patients of undetectable variants). It is concluded that it is difficult to predict at baseline the emergence of telaprevir‐resistant variants after commencement of triple therapy in prior non‐responders of HCV genotype 1, even with the use of ultra‐deep sequencing. J. Med. Virol. 85: 1028–1036, 2013. © 2013 Wiley Periodicals, Inc.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><pmid>23588728</pmid><doi>10.1002/jmv.23579</doi><tpages>9</tpages></addata></record>
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subjects Adult
Aged
Amino Acid Substitution
Antiviral Agents - therapeutic use
Antiviral drugs
Biological and medical sciences
DNA, Viral - analysis
DNA, Viral - genetics
Drug resistance
Drug Resistance, Viral - drug effects
Drug Resistance, Viral - genetics
Drug Therapy, Combination
Female
Fundamental and applied biological sciences. Psychology
Genotype
Genotype & phenotype
HCV
Hepacivirus - drug effects
Hepacivirus - genetics
Hepatitis
Hepatitis C virus
Hepatitis C, Chronic - drug therapy
Hepatitis C, Chronic - immunology
Hepatitis C, Chronic - virology
High-Throughput Nucleotide Sequencing
Human viral diseases
Humans
Infectious diseases
Interferon-alpha - therapeutic use
Male
Medical sciences
Microbiology
Middle Aged
Miscellaneous
non-response
Oligopeptides - therapeutic use
Polyethylene Glycols - therapeutic use
Recombinant Proteins - therapeutic use
resistant variants
Ribavirin - therapeutic use
Sequence Analysis, DNA
telaprevir
Treatment Outcome
ultra-deep sequence
Viral diseases
Virology
title Emergence of telaprevir-resistant variants detected by ultra-deep sequencing after triple therapy in patients infected with HCV genotype 1
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