Zhang, Tong; Ding, Haibo; An, Minghui; Wang, Xiaonan; Tian, Wen; Zhao, Bin; Han, Xiaoxu published the artcile< Factors associated with high-risk low-level viremia leading to virologic failure: 16-year retrospective study of a Chinese antiretroviral therapy cohort>, Application of C19H34O2, the main research area is tenofovir lamivudine antiretroviral agent viremia virol failure population; First-line regimen; HIV-1; Long-term antiretroviral therapy; Low-level viremia; Lower-income countries; Viral load assay; Virologic failure.
Abstract: Background: Low level viremia (LLV) often occurs during antiretroviral therapy (ART) against HIV-1. However, whether LLV increases the risk of virol. failure (VF) is controversial because of the non-uniform definitions of LLV and VF. Methods: A long-term first line regimen ART cohort from 2002 to 2018 from Shenyang, northeast China, was retrospectively studied. All participants were followed up every 3 to 6 mo to evaluate the treatment effect. The high-risk LLV subgroups leading to VF (with strict standards) were explored with Cox proportional hazards model and linear mixed-effect model. The association factors of high-risk LLV were further explored using multivariate logistic regression analyses. Results: A total of 2155 HIV-1 infected participants were included; of these, 38.7% showed LLV. Both high level LLV (HLLV) and any other level LLV coupled with high level blip (HLB) showed higher risk of VF (hazards ratios, HRHLLV = 5.93, and HRHLB = 2.84, p < 0.05 resp.). Moreover, HR increased with prolonged duration of LLV. Independent factors associated with high-risk LLV included the zenith baseline viral load (VL) above 6 log copies/mL (aOR = 3.49, p = 0.002), nadir baseline CD4 + T cell counts below 200 cells/mm3 (aOR = 1.78, p = 0.011), Manchu (aOR = 2.03, p = 0.003), ART over 60 mo (aOR = 1.81, p = 0.004), AZT + 3TC + NVP (aOR = 2.26, p < 0.001) or DDI-based regimen (aOR = 9.96, p = 0.002), and subtype B' infection (aOR = 8.22, p = 0.001). Conclusions: In case of VF with strict standards, high-risk LLV leading to VF includes VL above 400 copies/mL, occurring at least once. Serious laboratory indicators or advanced stage of infection, long term ART and subtype B' infection might also predict the occurrence of high-risk LLV. BMC Infectious Diseases published new progress about Antiviral agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.
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