ArticlePakistan journal of medical sciences
Subgenomic sequence analysis reveals emergence of new circulating recombinant forms of HIV-1 in Pakistan.
Article in Pakistan journal of medical sciences. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background and Objective: Pakistan has witnessed a dramatic change in the increasing prevalence and emergence of HIV subtypes for more than two decades. Pakistani population is increasingly engaged in high-risk practices, and the prescribed drugs are potentially causing resistance. There are chances that these resistant strains are beginning to circulate from high-risk to the general population. Methods: The study was conducted at the section of Molecular Pathology Lab of Dow Diagnostic and Research Laboratory, Dow University of Health Sciences (DUHS) Karachi. In this study, we analyzed gene sequences of HIV for drug resistance and molecular epidemiology., along with amino acid sequence variability. Furthermore, we undertook phylogenetic analysis for possible geographic linkages of Pakistani HIV strains. Results: Our results demonstrate that A1 is the leading HIV subtype circulating in the country, whereas other emerging subtypes and recombinant forms, including subtype B, CRF02_AG, CRF10_CD CRF35_AD, and CRF11_cpx were also observed. Our sequences cluster with the Middle East, African, and a few European sequences according to geographical distribution. These sequences showed high-level resistance per drug resistance pattern, with 62.5% of patients exhibiting resistance to NNRTI drugs and 60% mutation at E138A and K103N, respectively, against NNRTI drugs. About 75% sequences showed resistance mutation at M184V against NRTI drugs. The antiretroviral drugs are now causing H-LR to the patients with no effect. Our results also revealed that certain regions of RT exhibited high sequence variability, especially at Amino Acids positions p.119, p.130, p.157, p.164. Conclusion: We hereby report major novel mutations and several minor mutations that may have a drastic change in the drug resistance pattern.
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