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Molecular Network Analysis Reveals Transmission of HIV-1 Drug-Resistant Strains Among Newly Diagnosed HIV-1 Infections in a Moderately HIV Endemic City in China. | LitMetric

AI Article Synopsis

  • A study conducted in Shenyang, China from 2016 to 2019 examined the prevalence of transmitted drug resistance (TDR) in newly diagnosed HIV patients, revealing a TDR prevalence of 9.1%.
  • The prevalent HIV subtypes were identified, with CRF07_BC showing the highest TDR rate at 14.6%, followed by subtype B and CRF01_AE.
  • Molecular network analysis indicated that TDR is mainly transmitted among men who have sex with men (MSM), pinpointing key areas for targeted interventions in controlling HIV in China.

Article Abstract

Since the implementation of the "treat all" policy in China in 2016, there have been few data on the prevalence of transmitted drug resistance (TDR) in China. In this study, we describe TDR in patients newly diagnosed with human immunodeficiency virus (HIV) infection between 2016 and 2019 in Shenyang city, China. Demographic information and plasma samples from all newly reported HIV-infected individuals in Shenyang from 2016 to 2019 were collected. The HIV gene was amplified and sequenced for subtyping and TDR. The spread of TDR was analyzed by inferring an HIV molecular network based on pairwise genetic distance. In total, 2,882 sequences including CRF01_AE (2019/2,882, 70.0%), CRF07_BC (526/2,882, 18.3%), subtype B (132/2,882, 4.6%), and other subtypes (205/2,882, 7.1%) were obtained. The overall prevalence of TDR was 9.1% [95% confidence interval (CI): 8.1-10.2%]; the prevalence of TDR in each subtype in descending order was CRF07_BC [14.6% (95% CI: 11.7-18.0%)], subtype B [9.1% (95% CI: 4.8-15.3%)], CRF01_AE [7.9% (95% CI: 6.7-9.1%)], and other sequences [7.3% (95% CI: 4.2-11.8%)]. TDR mutations detected in more than 10 cases were Q58E ( = 51), M46ILV ( = 46), K103N ( = 26), E138AGKQ ( = 25), K103R/V179D ( = 20), and A98G ( = 12). Molecular network analysis revealed three CRF07_BC clusters with TDR [two with Q58E (29/29) and one with K103N (10/19)]; and five CRF01_AE clusters with TDR [two with M46L (6/6), one with A98G (4/4), one with E138A (3/3), and one with K103R/V179D (3/3)]. In the TDR clusters, 96.4% (53/55) of individuals were men who have sex with men (MSM). These results indicate that TDR is moderately prevalent in Shenyang (5-15%) and that TDR strains are mainly transmitted among MSM, providing precise targets for interventions in China.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8778802PMC
http://dx.doi.org/10.3389/fmicb.2021.797771DOI Listing

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