Detection of intersubtype recombinants with respect to env and nef genes of HIV-1 among female sex workers in Calcutta, India.
HIV-1 detected among female sex workers in Calcutta, India was characterized in respect to env and nef genes. A total of 39 HIV-1 seropositive samples were used in the study. Phylogenetic analysis of the nucleotide sequences of respective regions showed that 22 out of 39 samples (56.4%) were infected with subtype C with respect to both env and nef genes; however, 17 samples (43.6%) showed distinct subtype discordance. Simplot analysis of these samples showed the presence of intersubtype recombination between subtypes C and B. Both env C/nef B and env B/nef C recombinants were found to be present; 16 samples were found to be env C/nef B and 1 sample was detected as env B/nef C. This result indicates the emergence of intersubtype recombinants of HIV-1 for the first time in this eastern part of India.
Bhanja
Payel
P
HIV/AIDS Laboratory, National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Road, Scheme-XM, Beliaghata, Calcutta, India.
Sengupta
Satarupa
S
Banerjee
Debjani
D
Sarkar
Kamalesh
K
Jana
Smarajit
S
Chakrabarti
Sekhar
S
D000328:Adult; D016000:Cluster Analysis; D005260:Female; D005838:Genotype; D015658:HIV Infections / Q000821:virology*; D015497:HIV-1 / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D007194:India; D008969:Molecular Sequence Data; D010802:Phylogeny; D011995:Recombination, Genetic; D017422:Sequence Analysis, DNA; D017385:Sequence Homology; D011477:Sex Work; D054299:env Gene Products, Human Immunodeficiency Virus / Q000235:genetics*; D054311:nef Gene Products, Human Immunodeficiency Virus / Q000235:genetics*
D054299:env Gene Products, Human Immunodeficiency Virus; D054311:nef Gene Products, Human Immunodeficiency Virus; C514837:nef protein, Human immunodeficiency virus 1