Lan Yun, Li Linghua, Xiao Mingfeng, Lin Yaqing, Ling Xuemei, Li Feng, Hu Fengyu
Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, 510440, China.
Guangzhou Institute of Clinical Infectious Diseases, Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, 510440, China.
Virus Genes. 2025 Feb;61(1):136-143. doi: 10.1007/s11262-024-02127-x. Epub 2024 Dec 16.
Human immunodeficiency virus type 1 (HIV-1) is characterized by its extremely high level of genetic diversity. The spread of different subtypes in the same population often leads to the emergence of circulating recombinant forms (CRFs) and unique recombinant forms (URFs). At present, the main recombinant subtypes of HIV-1 in China originate from CRF07_BC, CRF01_AE, CRF55_01B and subtype B. Here, we obtained the nearly full-length genomes (NFLGs) from eight HIV-1 infected patients in Guangdong Province, which shared highly similar recombinant patterns, involving two CRF01_AE, one CRF07_BC and two subtype B segments. The eight NFLG sequences own four similar breakpoints as follows: 1220 nucleotide (nt), 2243 nt, 2673 nt, and 5820 nt according to the HXB2 reference sequence, and they therefore were assigned as CRF162_cpx. This is the first complex CRF derived from CRF01_AE, CRF07_BC and subtype B in China. The Bayesian inference of the segments showed that HIV-1 CRF162_cpx was inferred to have approximately originated around 2010-2015. The emergence of CRF162_cpx indicates that the HIV diversity in southeast China constantly accumulates and evolves. Thus, intensive surveillance of HIV-1 molecular epidemiology should be reinforced.
1型人类免疫缺陷病毒(HIV-1)的特点是其极高的基因多样性水平。不同亚型在同一人群中的传播常常导致循环重组型(CRF)和独特重组型(URF)的出现。目前,中国HIV-1的主要重组亚型源自CRF07_BC、CRF01_AE、CRF55_01B和B亚型。在此,我们从广东省8名HIV-1感染患者中获得了近全长基因组(NFLG),这些基因组具有高度相似的重组模式,涉及两个CRF01_AE、一个CRF07_BC和两个B亚型片段。根据HXB2参考序列,这8个NFLG序列有4个相似的断点,分别为1220核苷酸(nt)、2243 nt、2673 nt和5820 nt,因此它们被归类为CRF162_cpx。这是中国首个源自CRF01_AE、CRF07_BC和B亚型的复合CRF。对这些片段的贝叶斯推断表明,HIV-1 CRF162_cpx大约在2010 - 2015年左右起源。CRF162_cpx的出现表明中国东南部的HIV多样性在不断积累和演变。因此,应加强对HIV-1分子流行病学的强化监测。