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Article: Molecular Characterization of HIV-1 Minority Subtypes in Hong Kong: A Recent Epidemic of CRF07_BC among the Men who have Sex with Men Population

TitleMolecular Characterization of HIV-1 Minority Subtypes in Hong Kong: A Recent Epidemic of CRF07_BC among the Men who have Sex with Men Population
Authors
KeywordsHIV-1 epidemiology
CRF07_BC
HIV-1 minority subtypes
non-B non-AE transmission
men-who-have-sexwith- men
Issue Date2019
PublisherBentham Science Publishers Ltd. The Journal's web site is located at https://benthamscience.com/journals/current-hiv-research/
Citation
Current HIV Research, 2019, v. 17 n. 1, p. 53-64 How to Cite?
AbstractBackground: Over the past years, an increasing trend was noticed for non-B and non- CRF01_AE HIV-1 strains prevalence in Hong Kong. Objective: In this study, we aimed at using the available HIV-1 pol sequences collected from 1994 to 2013 through our local antiretroviral resistance surveillance program to investigate the molecular epidemiology and evolution of HIV-1 minority subtypes in Hong Kong. We also aimed at investigating their potential association and impact of those transmission risk groups. Methods: A total of 2,315 HIV-1 partial pol sequences were included. HIV-1 genotypes were determined by REGA Genotyping Tool and phylogenetic analysis with reference sequences. The viral evolutionary rates and time of the most common ancestor (tMRCA) were estimated by Bayesian Markov Chain Monte Carlo (MCMC) interference. Results: Apart from the two prevalent HIV-1 genotypes in Hong Kong (subtype B,41.6%, CRF01_AE,40.5%), phylogenetic analysis revealed a broad viral diversity including CRF07_BC(5.1%), subtype C(4.5%), CRF02_AG(1.1%), CRF08_BC(0.8%), subtype A1(0.8%), subtype G(0.4%), subtype D(0.4%), CRF06_cpx(0.4%), subtype F(0.1%), CRF12_BF(0·04%) and other recombinants(4.5%). The top five minority subtypes were further analyzed which demonstrated distinct epidemiological and phylogenetic patterns. Over 70% of subtypes A1, C and CRF02_AG infections were circulated among non-Chinese Asians or African community in Hong Kong and were mainly transmitted between heterosexual regular partners. Instead, over 90% of CRF07_BC and CRF08_BC patients were Chinese. An epidemic cluster was identified in CRF07_BC and estimated to expand from 2002 onwards based on skyline plot and molecular clock analysis. Conclusion: Our results highlighted the emergence of CRF07_BC epidemic in local MSM community, public health interventions targeting the community should be further enhanced to tackle the epidemic.
Persistent Identifierhttp://hdl.handle.net/10722/289444
ISSN
2019 Impact Factor: 0.802
2015 SCImago Journal Rankings: 0.979

 

DC FieldValueLanguage
dc.contributor.authorLeung, KSS-
dc.contributor.authorTo, SWC-
dc.contributor.authorChen, JHK-
dc.contributor.authorSiu, GKH-
dc.contributor.authorChan, KCW-
dc.contributor.authorYam, WC-
dc.date.accessioned2020-10-22T08:12:45Z-
dc.date.available2020-10-22T08:12:45Z-
dc.date.issued2019-
dc.identifier.citationCurrent HIV Research, 2019, v. 17 n. 1, p. 53-64-
dc.identifier.issn1570-162X-
dc.identifier.urihttp://hdl.handle.net/10722/289444-
dc.description.abstractBackground: Over the past years, an increasing trend was noticed for non-B and non- CRF01_AE HIV-1 strains prevalence in Hong Kong. Objective: In this study, we aimed at using the available HIV-1 pol sequences collected from 1994 to 2013 through our local antiretroviral resistance surveillance program to investigate the molecular epidemiology and evolution of HIV-1 minority subtypes in Hong Kong. We also aimed at investigating their potential association and impact of those transmission risk groups. Methods: A total of 2,315 HIV-1 partial pol sequences were included. HIV-1 genotypes were determined by REGA Genotyping Tool and phylogenetic analysis with reference sequences. The viral evolutionary rates and time of the most common ancestor (tMRCA) were estimated by Bayesian Markov Chain Monte Carlo (MCMC) interference. Results: Apart from the two prevalent HIV-1 genotypes in Hong Kong (subtype B,41.6%, CRF01_AE,40.5%), phylogenetic analysis revealed a broad viral diversity including CRF07_BC(5.1%), subtype C(4.5%), CRF02_AG(1.1%), CRF08_BC(0.8%), subtype A1(0.8%), subtype G(0.4%), subtype D(0.4%), CRF06_cpx(0.4%), subtype F(0.1%), CRF12_BF(0·04%) and other recombinants(4.5%). The top five minority subtypes were further analyzed which demonstrated distinct epidemiological and phylogenetic patterns. Over 70% of subtypes A1, C and CRF02_AG infections were circulated among non-Chinese Asians or African community in Hong Kong and were mainly transmitted between heterosexual regular partners. Instead, over 90% of CRF07_BC and CRF08_BC patients were Chinese. An epidemic cluster was identified in CRF07_BC and estimated to expand from 2002 onwards based on skyline plot and molecular clock analysis. Conclusion: Our results highlighted the emergence of CRF07_BC epidemic in local MSM community, public health interventions targeting the community should be further enhanced to tackle the epidemic.-
dc.languageeng-
dc.publisherBentham Science Publishers Ltd. The Journal's web site is located at https://benthamscience.com/journals/current-hiv-research/-
dc.relation.ispartofCurrent HIV Research-
dc.subjectHIV-1 epidemiology-
dc.subjectCRF07_BC-
dc.subjectHIV-1 minority subtypes-
dc.subjectnon-B non-AE transmission-
dc.subjectmen-who-have-sexwith- men-
dc.titleMolecular Characterization of HIV-1 Minority Subtypes in Hong Kong: A Recent Epidemic of CRF07_BC among the Men who have Sex with Men Population-
dc.typeArticle-
dc.identifier.emailLeung, KSS: kssleung@hku.hk-
dc.identifier.emailChen, JHK: jonchk@hku.hk-
dc.identifier.emailYam, WC: wcyam@hku.hk-
dc.identifier.authorityYam, WC=rp00313-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.2174/1570162X17666190530081355-
dc.identifier.pmid31142258-
dc.identifier.scopuseid_2-s2.0-85070181516-
dc.identifier.hkuros317181-
dc.identifier.volume17-
dc.identifier.issue1-
dc.identifier.spage53-
dc.identifier.epage64-
dc.publisher.placeUnited Arab Emirates-

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