Identification of a new 2-amino acid insertion in the integrase coding region of HIV-1 subtype G isolates.
J Med Virol
; 93(11): 6388-6392, 2021 11.
Article
in En
| MEDLINE
| ID: mdl-34260070
ABSTRACT
Amino acid insertions have been rarely found in the integrase (IN) coding region of Human immunodeficiency virus 1 (HIV-1), and have been considered as natural polymorphisms. It is still unclear the potential impact of these insertion mutations on the viral replication capacity and/or susceptibility to integrase strand transfer inhibitors (INSTIs). The objective of this study was to describe a previously unreported amino acid insertion in the IN coding region of HIV-1 isolates obtained from antiretroviral treatment-naïve infected individuals. Nucleotide sequences of HIV-1 isolates obtained from two infected individuals were analyzed for genotypic resistance to antiretroviral drugs. Phylogenetic inference was carried out for HIV-1 genetic variant identification. An unreported insertion of a threonine (T) and an asparagine (N) between codon 255 and 256 (S255N_TN) was identified in the IN C-terminal domain of HIV-1 subtype G isolates. No resistance-associated mutations to INSTIs were detected in the inserted sequences. Both individuals maintained undetectable HIV-1 RNA viral load, 24 months after undergoing antiretroviral treatment with an INSTI containing regimen. The results demonstrated the possibility of transmission of this insertion mutation and suggested that the codon 255 insert by itself may not affect susceptibility to INSTIs.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Frameshift Mutation
/
Open Reading Frames
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HIV-1
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HIV Integrase
/
Amino Acids
Type of study:
Diagnostic_studies
Limits:
Female
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Humans
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Male
Language:
En
Journal:
J Med Virol
Year:
2021
Type:
Article
Affiliation country:
Portugal