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LIU Huan-xia, HE Sheng-hua, ZHOU Rui-feng, et al. Genetic Subtypes and Status of Transmitted Drug Resistance of HIV/AIDS Patients in Sichuan[J]. Journal of Sichuan University (Medical Sciences), 2022, 53(5): 851-856. DOI: 10.12182/20220960206
Citation: LIU Huan-xia, HE Sheng-hua, ZHOU Rui-feng, et al. Genetic Subtypes and Status of Transmitted Drug Resistance of HIV/AIDS Patients in Sichuan[J]. Journal of Sichuan University (Medical Sciences), 2022, 53(5): 851-856. DOI: 10.12182/20220960206

Genetic Subtypes and Status of Transmitted Drug Resistance of HIV/AIDS Patients in Sichuan

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  • Corresponding author:

    HE Sheng-hua, E-mail: 13198552429@163.com

  • Received Date: December 06, 2021
  • Revised Date: June 08, 2022
  • Available Online: September 25, 2022
  • Published Date: September 19, 2022
  •   Objective   To investigate the distribution characteristics of the HIV genetic subtypes and the status quo of transmitted drug resistance among HIV/AIDS patients in Sichuan with no previous history of receiving antiretroviral therapy (ART).
      Methods   Adult HIV/AIDS patients who were hospitalized in Sichuan and who had no previous history of exposure to ART drugs exposure were enrolled. In-house sequencing of the HIV gene was done and phylogenetic tree was constructed to analyze the HIV genetic subtypes. The Stanford HIV drug resistance database was used to make online comparison of the drug resistance mutation sites and to determine the presence or absence of drug resistance, and the type and level of drug resistance.
      Results  A total of 120 patients were enrolled for the study, and 120 blood samples were collected. The genetic subtypes of 87.5% (105/120) of the samples were successfully amplified. The distribution characteristics of HIV genotype were as follows, CRF01_AE accounted for 46.67% (49/105), CRF07_BC accounted for 39.05% (41/105), and the others genetic subtypes, 14.28% (15/105). There were no significant differences between the different genetic subtypes in sex, age, ethnicity, HIV transmission route, drug resistance, baseline HIV RNA and baseline CD4 (P>0.05). Drug-resistant mutation sites were detected in 25 samples, accounting for 20.83% (25/120) of all samples, with 16.67% (20/120) being potential drug resistance and 4.17% (5/120) being transmitted drug resistance. For the 24 samples found to be resistant to non-nucleoside reverse transcriptase inhibitors (NNRTIs), the mutation frequency of V179D/E was the highest. One patient showed resistance to protease inhibitors (PI) and the mutation site was M46I. No nucleoside reverse transcriptase inhibitor (NRTI) or integrase inhibitors (INTI) resistance were found.
      Conclusions  The main genetic subtypes of HIV/AIDS patients in Sichuan with no previous history of receiving ART were CRF01_AE and CRF07_BC. The incidence of transmitted drug resistance was low. The drug resistance detected in the study was predominantly resistance to NNRTIs. Baseline HIV drug resistance testing is of great significance for formulating effective ART regimens.
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