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Fokam J, Mpouel Bala ML, Santoro MM, Takou D, Tala V, Beloumou G, Ngoufack ES, Chenwi C, Pabo Willy Leroi T, Njume D, Teto G, Dambaya B, Djupsa S, Sosso S, Ateba F, Kamta C, Bala L, Njom Nlend AE, Koki Ndombo P, Colizzi V, Perno CF, Ndjolo A. Archiving of mutations in HIV-1 cellular reservoirs among vertically infected adolescents is contingent with clinical stages and plasma viral load: Evidence from the EDCTP-READY study. HIV Med 2021; 23:629-638. [PMID: 34951111 DOI: 10.1111/hiv.13220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/09/2021] [Accepted: 12/06/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Globally, HIV-related adolescent deaths have increased about 50%, especially for those who are vertically infected. This could be driven by archived drug resistance mutations (DRMs) as children grow up, which might jeopardize antiretroviral therapy (ART). Our objective was to compare HIV-1 genotypic variation between plasma RNA and proviral DNA of vertically infected adolescents (aged 10-19 years) failing ART. METHODS A comparative study was conducted in 2019 among 296 adolescents with perinatal HIV infection (ALPHI) failing ART in health facilities of the Centre Region of Cameroon. The WHO clinical stage, CD4 count and plasma viral load (PVL) were measured. For those failing ART (PVL ≥ 1000 copies/mL), RNA (plasma) and proviral DNA (buffy coat) were sequenced in the pol gene at Chantal BIYA International Reference Centre (CIRCB), Yaoundé, Cameroon. HIV-1 subtypes and DRMs were interpreted using Stanford HIVdb v.8.8 and MEGA-X. RESULTS Of the 30% (89/296) failing ART, 81 had both RNA and DNA sequences generated and three were excluded for APOBEC mutations: the mean age was 16 ± 3 years; female-to-male ratio was 3:5; median PVL was 46 856 copies/mL [interquartile range (IQR): 19 898-271 410]; median CD4 count was 264 cells/μL (IQR: 131-574); and 42% were at WHO clinical stage 3/4. Subtype concordance between RNA and DNA viral strains was 100%, with CRF02_AG being predominant (65%) and two potential new recombinants found (A1/G/K; F1/G). Adolescents with DRMs were significantly higher in plasma than in proviral DNA (92% vs. 86%, p < 0.0001). Prevalent DRMs by drug class (RNA vs. DNA respectively) were at position M184 (74% vs. 67%) for nucleoside reverse transcriptase inhibitors (NRTIs), K103 (63% vs. 59%) for non-NRTIs, and V82, L76 and M46 (2% vs. 2%) for protease inhibitors. A total of 35% (27/78) of adolescents had concordant DRM profiles in RNA and DNA, while 27% (21/78) had DRMs only in proviral DNA. The presence of archived DRMs was associated with advanced clinical stage 3/4 (OR = 0.14, p = 0.0003) and PVL < 5 Log (Copies/mL) (OR: 4.88, p = 0.006). CONCLUSIONS Although plasma RNA remains more sensitive for detecting HIV-1 DRMs, about a quarter of ALPHI experiencing ART failure in an African setting might have archived DRMs in viral reservoirs, indicating clinically occult resistance. Thus, to ensure effective ART success, proviral DNA profiling (alongside RNA genotyping) would provide additional DRMs for adolescents with advanced clinical stages and/or moderate PVL.
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Affiliation(s)
- Joseph Fokam
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Health Sciences, University of Buea, Buea, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon.,National HIV Drug Resistance Working Group, Ministry of Public Health, Yaoundé, Cameroon
| | - Marie Laure Mpouel Bala
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | | | - Désiré Takou
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Valère Tala
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Grace Beloumou
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Ezechiel Semengue Ngoufack
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,University of Rome Tor Vergata, Rome, Italy.,Evangelic University of Cameroon, Bandjoun, Cameroon
| | - Collins Chenwi
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Togna Pabo Willy Leroi
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Sciences, University of Buea, Buea, Cameroon
| | - Debimeh Njume
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Health Sciences, University of Buea, Buea, Cameroon
| | - Georges Teto
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Beatrice Dambaya
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Sandrine Djupsa
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Samuel Sosso
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Francis Ateba
- Mother and Child Centre of the Chantal BIYA's Foundation, Yaoundé, Cameroon
| | | | - Lionel Bala
- District Hospital of Mbalmayo, Mbalmayo, Cameroon
| | | | - Paul Koki Ndombo
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon.,Mother and Child Centre of the Chantal BIYA's Foundation, Yaoundé, Cameroon
| | - Vittorio Colizzi
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,University of Rome Tor Vergata, Rome, Italy.,Evangelic University of Cameroon, Bandjoun, Cameroon
| | - Carlo Frederico Perno
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,University of Rome Tor Vergata, Rome, Italy.,Bambino Gesü Pediatric Hospital, Rome, Italy
| | - Alexis Ndjolo
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
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Fokam J, Ngoufack Jagni Semengue E, Armenia D, Takou D, Dambaya B, Teto G, Chenwi CA, Nka AD, Beloumou GA, Ndjeyep SCD, Tchouaket MCT, Fainguem N, Sosso SM, Colizzi V, Perno CF, Ndjolo A, Ceccherini-Silberstein F, Santoro MM. High performance of integrase genotyping on diverse HIV-1 clades circulating in Cameroon: toward a successful transition to dolutegravir-based regimens in low and middle-income countries. Diagn Microbiol Infect Dis 2021; 102:115574. [PMID: 34864527 DOI: 10.1016/j.diagmicrobio.2021.115574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 10/08/2021] [Accepted: 10/17/2021] [Indexed: 11/03/2022]
Abstract
A successful transition to dolutegravir-based regimens in low and middle-income countries (LMICs) requires an integrase genotyping assay effective on diverse HIV-1 clades. We herein developed and validated an in-house integrase genotyping protocol on plasma samples from 195 HIV-infected patients in Cameroon. Median [IQR] viremia was 23,574 (518-109,235) copies/mL; 128/195 participants had ≥1000copies/mL (i.e., WHO-threshold for genotypic resistance testing in LMICs). A total of 18 viral clades were detected: 72(51.1%) CRF02_AG, 38(26.9%) pure subtypes and 31(22.0%) other recombinants. Following WHO-threshold (≥1000copies/ml), sequencing performance was 82.81%(106/128). Regarding viremia, performance was 85.00%(68/80) with ≥100,000copies/mL versus 76.67%(23/30) with 10,000 to 99,999copies/mL (P = 0.22); 83.33%(15/18) with 1,000 to 99,999copies/mL (P = 0.55); 73.68%(14/19) with 500 to 999copies/mL (P = 0.19); 50%(13/26) for 200 to 499copies/mL (P = 0.0005) and 36.36%(8/22) for <200copies/mL (P < 0.0001). The developed in-house integrase-genotyping is highly effective on both pure and recombinant viral clades, even at low-level viremia. This performance underscores its usefulness in monitoring integrase-resistance mutations and supporting the scale-up of dolutegravir-based regimens in LMICs.
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Affiliation(s)
- Joseph Fokam
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; Faculty of Health Sciences, University of Buea, Buea, Cameroon; Faculty of Medicine and biomedical Sciences, University of Yaounde I, Yaounde, Cameroon.
| | - Ezechiel Ngoufack Jagni Semengue
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; University of Rome Tor Vergata, Rome, Italy; Evangelical University of Cameroon, Bandjoun, Cameroon.
| | - Daniele Armenia
- Saint Camillus International University of Health and Medical Sciences, Rome Italy
| | - Désiré Takou
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Béatrice Dambaya
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; Faculty of Sciences, University of Yaounde I, Yaounde, Cameroon
| | - Georges Teto
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Collins Ambe Chenwi
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; Faculty of Medicine and biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
| | - Alex Durand Nka
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; University of Rome Tor Vergata, Rome, Italy; Evangelical University of Cameroon, Bandjoun, Cameroon
| | - Grâce Angong Beloumou
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Sandrine Claire Djupsa Ndjeyep
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Michel Carlos Tommo Tchouaket
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Nadine Fainguem
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Samuel Martin Sosso
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Vittorio Colizzi
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; University of Rome Tor Vergata, Rome, Italy; Evangelical University of Cameroon, Bandjoun, Cameroon
| | - Carlo-Federico Perno
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; Bambino Gesu Children's Hospital, Rome, Italy
| | - Alexis Ndjolo
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon; Faculty of Medicine and biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
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Semengue ENJ, Armenia D, Inzaule S, Santoro MM, Dambaya B, Takou D, Teto G, Nka AD, Yagai B, Fabeni L, Chenwi C, Angong Beloumou G, Djupsa Ndjeyep SC, Colizzi V, Perno CF, Ceccherini-Silberstein F, Fokam J. Baseline integrase drug resistance mutations and conserved regions across HIV-1 clades in Cameroon: implications for transition to dolutegravir in resource-limited settings. J Antimicrob Chemother 2021; 76:1277-1285. [PMID: 33501504 DOI: 10.1093/jac/dkab004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 12/28/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Transition to dolutegravir-based regimens in resource-limited settings (RLS) requires prior understanding of HIV-1 integrase variants and conserved regions. Therefore, we evaluated integrase drug resistance mutations (DRMs) and conserved regions amongst integrase strand transfer inhibitor (INSTI)-naive patients harbouring diverse HIV-1 clades in Cameroon. METHODS A cross-sectional study was conducted amongst 918 INSTI-naive patients from Cameroon (89 ART-naive and 829 ART-experienced patients). HIV-1 sequences were interpreted regarding INSTI-DRMs using the Stanford HIVdb v8.9-1 and the 2019 IAS-USA list. Amino acid positions with <1% variability were considered as highly conserved. Subtyping was performed by phylogeny. RESULTS Overall prevalence (95% CI) of INSTI-DRMs was 0.8% (0.4-1.7), with 0.0% (0.0-4.0) amongst ART-naive versus 0.9% (0.5-1.9) amongst ART-experienced patients; P = 0.44. Accessory mutations (95% CI) were found in 33.8% (30.9-37.0), with 38.2% (28.1-49.1) amongst ART-naive versus 33.4% (30.4-36.7) amongst ART-experienced patients; P = 0.21. Of 288 HIV-1 integrase amino acid positions, 58.3% were highly conserved across subtypes in the following major regions: V75-G82, E85-P90, H114-G118, K127-W132, E138-G149, Q168-L172, T174-V180, W235-A239 and L241-D253. Wide genetic diversity was found (37 clades), including groups M (92.3%), N (1.4%), O (6.2%) and P (0.1%). Amongst group M, CRF02_AG was predominant (47.4%), with a significantly higher frequency (95% CI) of accessory mutations compared with non-AG [41.4% (36.8-46.0) versus 27.1% (23.3-31.2) respectively; P < 0.001]. CONCLUSIONS The low baseline of INSTI-DRMs (<1%) in Cameroon suggests effectiveness of dolutegravir-based regimens. In spite of high conservation across clades, the variability of accessory mutations between major circulating strains underscores the need for monitoring the selection of INSTI-DRMs while scaling up dolutegravir-based regimens in RLS.
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Affiliation(s)
- Ezechiel Ngoufack Jagni Semengue
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Department of Experimental Medicine, University of Rome "Tor Vergata", Rome, Italy.,Evangelical University of Cameroon, Bandjoun, Cameroon
| | - Daniele Armenia
- Department of Experimental Medicine, University of Rome "Tor Vergata", Rome, Italy.,Saint Camillus International University of Health and Medical Sciences, Rome, Italy
| | - Seth Inzaule
- Department of Global Health, Academic Medical Center of the University of Amsterdam and Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
| | | | - Béatrice Dambaya
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Désiré Takou
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Georges Teto
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Alex Durand Nka
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Department of Experimental Medicine, University of Rome "Tor Vergata", Rome, Italy.,Evangelical University of Cameroon, Bandjoun, Cameroon
| | - Bouba Yagai
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Department of Experimental Medicine, University of Rome "Tor Vergata", Rome, Italy
| | - Lavinia Fabeni
- Laboratory of Virology, National Institute for Infectious Diseases "Lazzaro Spallanzani" - IRCCS, Rome, Italy
| | - Collins Chenwi
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Grâce Angong Beloumou
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Sandrine Claire Djupsa Ndjeyep
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon
| | - Vittorio Colizzi
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Department of Experimental Medicine, University of Rome "Tor Vergata", Rome, Italy.,Evangelical University of Cameroon, Bandjoun, Cameroon
| | - Carlo-Federico Perno
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Bambino Gesu Children's Hospital, IRCCS, Rome, Italy
| | | | - Joseph Fokam
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon.,National HIV Drug Resistance Working Group, Ministry of Public Health, Cameroon.,Faculty of Health Sciences, University of Buea, Buea, Cameroon
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4
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Njom-Nlend AE, Efouba N, Brunelle Sandie A, Fokam J. Determinants of switch to paediatric second-line antiretroviral therapy after first-line failure in Cameroon. Trop Med Int Health 2021; 26:927-935. [PMID: 33905593 DOI: 10.1111/tmi.13595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE With scale-up of antiretroviral therapy (ART) children, treatment failure and switch to subsequent ART regimens are common. Our objectives were to evaluate switching practices and identify factors associated among children and adolescents failing their first-line ART. METHODS A facility-based survey study was conducted in a cohort of children living with HIV experiencing virological failure (VF) at the Essos Hospital Centre of Yaounde, Cameroon. Data were collected using a standard questionnaire, and key variables were as follows: (a) VF defined as viral load (VL) > 1000 copies/ml, (b) rate of switch to second-line and (c) reason(s) for switching ART. Odds ratio (OR) with 95% confidence interval (CI) was used to assess the association between study variables, and P < 0.05 was considered statistically significant. RESULTS A total of 106 children experiencing VF were enrolled: median age was 8 [interquartile range (IQR): 3-15] years; 60.38% were boys and 39.62% were orphans of one/both parents. A proportion of 69% were at the WHO clinical stage III/IV, and 13.21% were experiencing immunological failure (CD4 < 200 cells/mm3 ). The median duration on first-line ART was 36 [IQR: 7-157] months prior to detecting VF, and the rate of switch to second-line ART was 70.75% (75/106). Delay in switching ART after a confirmed VF was 11 [IQR: 7-16] months. After switch to second-line ART, the median time to achieve undetectable VL (<40 copies/ml) was 14 [IQR: 9-21] months. Multivariate analysis revealed that only children with viral rebound (aOR = 0.09; 95% CI = 0.03-0.24) were less likely to be switched. Of note, being orphaned (aOR = 0.35, CI = 0.11-1.11), biological sex (aOR = 1.77, CI = 0.60-5.29) and immune status (aOR = 0.19, CI = 0.03-1.31, 0.09) had no significant effect on switching to second-line ART. CONCLUSION In this paediatric population experiencing VF after about 3-4 years from ART initiation, the majority are switched to second-line ART after a delay of almost one year. Delayed switch to second-line was driven essentially by viral rebound, underscoring the need for close viral monitoring.
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Affiliation(s)
- Anne-Esther Njom-Nlend
- Essos Hospital Centre, National Social Insurance Fund Hospital, Yaoundé, Cameroon.,Higher Institute of Medical Technology, University of Douala, Yaoundé, Cameroon
| | - Nadège Efouba
- Higher Institute of Medical Technology, University of Douala, Yaoundé, Cameroon
| | | | - Joseph Fokam
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management, Yaounde, Cameroon.,Faculty of Health Sciences, University of Buea, Buea, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon.,National HIV Drug Resistance Working Group, Ministry of Public Health, Yaounde, Cameroon
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5
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Dambaya B, Fokam J, Ngoufack ES, Takou D, Santoro MM, Této G, Beloumou GA, Mouafo LCM, Kamgaing N, Sosso SM, Billong SC, Njom Nlend AE, Sobze MS, Nkenfou C, Koki PN, Njiokou F, Colizzi V, Perno CF, Ndjolo A. HIV-1 Drug Resistance and Genetic Diversity among Vertically Infected Cameroonian Children and Adolescents. EXPLORATORY RESEARCH AND HYPOTHESIS IN MEDICINE 2020; 000:1-9. [DOI: 10.14218/erhm.2019.00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Fofana DB, d'Almeida M, Lambert-Niclot S, Peytavin G, Girard PM, Lafia B, Zohoun-Guidigbi L, Keke RK, Soulie C, Marcelin AG, Morand-Joubert L. Resistance profile and treatment outcomes in HIV-infected children at virological failure in Benin, West Africa. J Antimicrob Chemother 2019; 73:3143-3147. [PMID: 30060186 DOI: 10.1093/jac/dky300] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 06/26/2018] [Indexed: 11/14/2022] Open
Abstract
Background In Africa a high percentage of HIV-infected children continue to experience HIV treatment failure despite enormous progress. In Benin (West Africa), there are currently no data on HIV drug resistance at failure in paediatric populations. Objectives To assess the frequency and patterns of HIV drug resistance among children with virological ART failures. Methods Dried blood spots from 62 HIV-infected children with virological failure were collected at the paediatric clinic of the National Hospital Center in Cotonou for genotyping and plasma drug concentration determination. Results Characteristics of the population show a median age of 10 years (IQR 6-13) and a median duration on ART of 5 years (IQR 3-7). Viruses from 53 children were successfully amplified. Of these, 76% of patients were on an NNRTI-based regimen and 24% on a boosted PI-based regimen. NRTI, NNRTI and dual-class resistance was present in 71%, 84% and 65% of cases, respectively. Only 4% of the children had major resistance mutations to PIs and none had major resistance mutations to integrase inhibitors. Among the participants, 25% had undetectable antiretroviral concentrations. Conclusions Our results showed that the development of drug resistance could be one of the main consequences of high and continuous viral replication in HIV-infected children in Benin. Thus, inadequate attention to monitoring lifelong ART in children may prevent achievement of the goal of the United Nations Program on HIV and AIDS (UNAIDS) of 90% viral suppression among patients receiving ART.
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Affiliation(s)
- D B Fofana
- Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), AP-HP, Hôpital Saint Antoine, Laboratoire de virologie, Paris, France
| | - M d'Almeida
- Département Mère Enfant, Faculté Des Sciences De La Santé, Université Abomey - Calavi, CNHU - HKM, Cotonou, Bénin
| | - S Lambert-Niclot
- Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), AP-HP, Hôpital Saint Antoine, Laboratoire de virologie, Paris, France
| | - G Peytavin
- Laboratoire de Pharmaco-Toxicologie, Hôpital Bichat-Claude Bernard, Paris, France
| | - P M Girard
- Department of Infectious and Tropical Diseases, Saint-Antoine Hospital AP-HP, Paris, France
| | - B Lafia
- Reference Laboratory of the National Program Against Aids CNHU - HKM, Cotonou, Bénin
| | - L Zohoun-Guidigbi
- Département Mère Enfant, Faculté Des Sciences De La Santé, Université Abomey - Calavi, CNHU - HKM, Cotonou, Bénin
| | - R K Keke
- Reference Laboratory of the National Center for the Treatment of HIV, Cotonou, Benin
| | - C Soulie
- Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), AP-HP, Hôpital Pitié Salpêtrière, Laboratoire de virologie, Paris, France
| | - A G Marcelin
- Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), AP-HP, Hôpital Pitié Salpêtrière, Laboratoire de virologie, Paris, France
| | - L Morand-Joubert
- Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), AP-HP, Hôpital Saint Antoine, Laboratoire de virologie, Paris, France
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7
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Fokam J, Santoro MM, Takou D, Njom-Nlend AE, Ndombo PK, Kamgaing N, Kamta C, Essiane A, Sosso SM, Ndjolo A, Colizzi V, Perno CF. Evaluation of treatment response, drug resistance and HIV-1 variability among adolescents on first- and second-line antiretroviral therapy: a study protocol for a prospective observational study in the centre region of Cameroon (EDCTP READY-study). BMC Pediatr 2019; 19:226. [PMID: 31277610 PMCID: PMC6612130 DOI: 10.1186/s12887-019-1599-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 06/25/2019] [Indexed: 12/03/2022] Open
Abstract
Background Sub-Saharan Africa (SSA) alone has nine out of every 10 children living with HIV globally and monitoring in this setting remains suboptimal, even as these children grow older. With scalability of antiretroviral therapy (ART), several HIV-infected children are growing towards adolescence (over 2.1 million), with the potentials to reach adulthood. However, despite an overall reduction in HIV-related mortality, there are increasing deaths among adolescents living with HIV (ADLHIV), with limited evidence for improved policy-making. Of note, strategies for adolescent transition from pediatrics to adult-healthcare are critical to ensure successful treatment response and longer life expectancy. Interestingly, with uptakes in prevention of mother-to-child transmission, challenges in ART programs, and high viremia among children in SSA, the success rate of paediatric ART might be quickly jeopardised, with possible HIV-1 drug-resistance (HIVDR) emergence, especially after years of paediatric ART exposure. Therefore, monitoring ART response in adolescents and evaluating HIVDR patterns might limit disease progression and guide on subsequent ART options for SSA ADLHIV. Objectives Among Cameroonian ADLHIV receiving ART, we shall evaluate the rate of immunovirologic failure, acquired HIVDR-associated mutations, HIV-1 subtype distribution, genetic variability in circulating (plasma) versus archived (cellular) viral strains, and HIVDR early warning indicators (EWIs) at different time-points. Methods A prospective and observational study will be conducted among 250 ADLHIV (10–19 years old) receiving ART in the centre region of Cameroon, and followed-up at 6 and 12 months after enrollment. Following consecutive sampling at enrolment, plasma viral load and CD4/CD8 count will be measured, and genotypic resistance testing (GRT) will be performed both in plasma and in buffy coat for participants experiencing virological failure (two consecutive viremia > = 1000 copies/ml). Plasma viral load and CD4/CD8 will be monitored for all participants at 6 and 12 months after enrolment. HIVDR-EWIs will be monitored and survival analysis performed during the 12 months follow-up. Primary outcomes are rates of virological failure, acquired-HIVDR, and mortality. Discussion Our findings will provide evidence-based recommendations to ensure successful transition from paediatrics to adult ART regimens and highlight further needs of active ART combinations, for reduced morbidity and mortality in populations of ADLHIV within SSA. Electronic supplementary material The online version of this article (10.1186/s12887-019-1599-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Joseph Fokam
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon. .,Faculty of Medicine and Biomedical Sciences (FMSB), University of Yaoundé I, Yaoundé, Cameroon. .,National HIV Drug Resistance Working Group (HIVDRWG), Ministry of Public Health, Yaoundé, Cameroon.
| | | | - Desire Takou
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | | | - Paul Koki Ndombo
- Faculty of Medicine and Biomedical Sciences (FMSB), University of Yaoundé I, Yaoundé, Cameroon.,Mother-Child Centre of the Chantal BIYA's foundation (MCC-CBF), Yaoundé, Cameroon
| | - Nelly Kamgaing
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences (FMSB), University of Yaoundé I, Yaoundé, Cameroon.,University Health Centre (UHC), Yaoundé, Cameroon
| | | | - Andre Essiane
- Mbalmayo District Hospital (Mb.DH), Mbalmayo, Cameroon
| | - Samuel Martin Sosso
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
| | - Alexis Ndjolo
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences (FMSB), University of Yaoundé I, Yaoundé, Cameroon
| | - Vittorio Colizzi
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon.,University of Rome Tor Vergata (UTV), Rome, Italy
| | - Carlo-Federico Perno
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon.,University of Rome Tor Vergata (UTV), Rome, Italy.,University of Milan (UM), Milan, Italy
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8
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Njom Nlend AE, Guessong CO, Nga Motaze AC, Soffo C, Koki Ndombo PO, Tsambang L, Fokam J. Outcomes of protease inhibitor-based antiretroviral therapy amongst children and associated-factors in Yaoundé, Cameroon. PLoS One 2019; 14:e0213900. [PMID: 30883591 PMCID: PMC6422392 DOI: 10.1371/journal.pone.0213900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 03/04/2019] [Indexed: 01/12/2023] Open
Abstract
Background There are limited data on protease inhibitor (PI)-based antiretroviral therapy (ART) amongst children in resource-limited settings, for informing on optimal paediatric regimens. Objective To evaluate therapeutic response to PI-based ART amongst HIV-infected Cameroonian children. Methods A retrospective study was conducted amongst children aged 2–18 years receiving a PI-based ART at the Essos Hospital Centre (EHC), Yaounde, Cameroon. Primary end points were therapeutic success on PI-based ART, defined as clinical success (WHO I/II clinical stage), immunological success (CD4 ≥ 500/mm3) and viral suppression (viral load [VL]<1000 copies/ml). Factors associated with therapeutic success were assessed in uni- and multivariate analysis using SPSS software v.2.0; with p<0.05 considered statistically significant. Results A total of 71 eligible children on PI-based ART were enrolled (42 on initial and 29 on substituted regimens), with a median age of 8 [IQR: 5–12] years and mean duration on ART of 7 years. Following therapeutic responses, all (100%) experienced clinical success, 95.2% experienced immunological success (91.7% on initial and 97.2% on substituted PI/r-based regimens) and 74.7% viral suppression. In univariate analysis, viral suppression was associated with: younger age (p<0.0001), living with parents as opposed to guardians (p = 0.049), and the educational level (p<0.0001). In multivariate analysis, only the age ranges of 10–14 years (OR: 0.22 [0.07–0.73]) and 15–18 years (OR: 0.08 [0.02–0.57]), were determinants of poor viral suppression. Conclusion Among these Cameroonian children, PI-based ART confers favourable clinical and immunological outcomes. The poor rate of viral suppression was mainly attributed to adolescence (10–18 years).
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Affiliation(s)
- Anne Esther Njom Nlend
- Essos Hospital Centre, National Insurance Fund, Yaoundé, Cameroon
- Higher Institute of Medical Technology Nkolondom, Department of Clinical Sciences, University of Douala, Cameroon
- Cameroon Association for Support of Persons and families affected by AIDS, Yaoundé, Cameroon
- * E-mail:
| | - Cathya Ornella Guessong
- Higher Institute of Medical Technology Nkolondom, Department of Clinical Sciences, University of Douala, Cameroon
| | | | - Claudian Soffo
- Cameroon Association for Support of Persons and families affected by AIDS, Yaoundé, Cameroon
| | - Paul Olivier Koki Ndombo
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
- Mother-Child Centre, Chantal BIYA Foundation, Yaoundé, Cameroon
| | - Lionel Tsambang
- Higher Institute of Medical Technology Nkolondom, Department of Clinical Sciences, University of Douala, Cameroon
| | - Joseph Fokam
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
- National HIV drug resistance prevention and surveillance working group, Ministry of Public Health, Yaoundé, Cameroon
- Virology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS prevention and management, Yaoundé, Cameroon
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9
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Takou D, Fokam J, Teto G, Santoro MM, Ceccherini-Silberstein F, Nanfack AJ, Sosso SM, Dambaya B, Salpini R, Billong SC, Gori C, Fokunang CN, Cappelli G, Colizzi V, Perno CF, Ndjolo A. HIV-1 drug resistance testing is essential for heavily-treated patients switching from first- to second-line regimens in resource-limited settings: evidence from routine clinical practice in Cameroon. BMC Infect Dis 2019; 19:246. [PMID: 30871487 PMCID: PMC6419466 DOI: 10.1186/s12879-019-3871-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 03/04/2019] [Indexed: 01/17/2023] Open
Abstract
Background With the phase-out of stavudine (d4T), change to first-line regimens with zidovudine (AZT) or tenofovir (TDF) in resource-limited settings (RLS) might increase risks of cross-resistance to nucleos(t) ide reverse transcriptase inhibitors (NRTI). This would restrict the scope of switching to the World Health Organisation (WHO)-recommended standard second-line combinations (SLC) without HIV drug resistance (HIVDR)-testing in routine clinical practice. Methods An observational study was conducted among 101 Cameroonian patients (55.4% male, median [IQR] age 34 [10–41] years) failing first-line antiretroviral therapy (ART) in 2016, and stratified into three groups according to NRTIs exposure: exposure to both thymidine analogues AZT “and” D4T (group-A, n = 55); exposure to both TDF and AZT “or” D4T (group-B, n = 22); exposure solely to D4T (group-C, n = 24). Protease-reverse transcriptase HIVDR was interpreted using the HIVdb penalty scores (≥60: high-resistance; 20–59: intermediate-resistance; < 20: susceptible). The acceptable threshold for potential-efficacy was set at 80%. Results The median [IQR] CD4, viral RNA, and time on ART, were respectively 129 [29–466] cells/μl, 71,630 [19,041-368,000] copies/ml, and 4 [2–5] years. Overall HIVDR-level was 89.11% (90/101), with 83.2% harbouring M184 V (high-level 3TC/FTC-resistance) and only 1.98% (2/101) major HIVDR-mutations to ritonavir-boosted protease-inhibitors (PI/r). Thymidine-analogue mutations (TAMs)-1 [T215FY (46.53%), M41 L (22.77%), L210 W (8.91%)], with cross-resistance to AZT and TDF, were higher compared to TAMs-2 [D67N (21.78%), K70R (19.80%), K219QE (18.81%)]. As expected, K65R was related with TDF-exposure: 0% (0/55) in group-A, 22.72% (5/22) group-B, 4.17% (1/24) group-C (p = 0.0013). The potential-efficacy of AZT vs. TDF was respectively 43.64% (24/55) vs. 70.91% (39/55) in group-A (p = 0.0038); 63.64% (14/22) vs. 68.28% (15/22) in group-B (p = 1.0000); and 37.50% (9/24) vs. 83.33% (20/24) in group-C (p = 0.0032). CRF02_AG was the prevailing subtype (63.40%), followed by CRF11.cpx (8.91%), A1 (7.92%), G (5.94%); without any significant effect of the subtype-distribution on HIVDR (92.2% in CRF02_AG vs. 83.8% in non-AG; p = 0.204). Conclusion First-line ART-failure exhibits high-level NRTI-resistance, with potential lower-efficacy of AZT compared to TDF. Significantly, using our 80% efficacy-threshold, only patients without NRTI-substitution on first-line could effectively switch to SLC following the WHO-approach. Patients with multiple NRTI-substitutions (exposed to both thymidine-analogues and TDF) on first-line ART would require HIVDR-testing to select active NRTIs for SLC. Electronic supplementary material The online version of this article (10.1186/s12879-019-3871-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Desire Takou
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon
| | - Joseph Fokam
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon. .,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon. .,National HIV Drug Resistance prevention and surveillance Working Group, Ministry of Public Health, Yaoundé, Cameroon.
| | - Georges Teto
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon
| | | | | | - Aubin Joseph Nanfack
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon
| | - Samuel Martin Sosso
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon
| | - Béatrice Dambaya
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon
| | | | - Serge Clotaire Billong
- National HIV Drug Resistance prevention and surveillance Working Group, Ministry of Public Health, Yaoundé, Cameroon.,Surveillance, Research, Planning, Monitoring and Evaluation service, Central Technical Group, National AIDS Control Committee, Yaounde, Cameroon
| | - Caterina Gori
- National Institute of Infectious Diseases Lazzaro Spallanzani, Rome, Italy
| | | | - Giulia Cappelli
- Institute of Cellular Biology and Neurobiology (IBCN), Consiglio Nazionale delle Ricerche (CNR), Rome, Italy
| | - Vittorio Colizzi
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon.,University of Rome Tor Vergata, Rome, Italy
| | - Carlo-Federico Perno
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon.,University of Rome Tor Vergata, Rome, Italy.,University of Milan, Milan, Italy
| | - Alexis Ndjolo
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
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10
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Characteristics of Treatment-experienced HIV-infected African Children and Adolescents Initiating Darunavir and/or Etravirine-based Antiretroviral Treatment. Pediatr Infect Dis J 2018; 37:669-672. [PMID: 29140932 DOI: 10.1097/inf.0000000000001843] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Data are limited on the selection and sequencing of second-line and third-line pediatric antiretroviral treatment (ART) in resource-limited settings. This study aimed to evaluate characteristics of African pediatric patients initiated on darunavir (DRV) and/or etravirine (ETR) through a specific drug donation program. METHODS This was a cross-sectional study of baseline immunologic, virologic and demographic characteristics of children and adolescents initiating DRV-based and/or ETR-based ART. Descriptive statistics were used. RESULTS Study enrolled 48 patients (45.8% women; median age = 15 years [interquartile range 17.7-10.3]) at 9 clinical sites in Zambia, Swaziland, Kenya and Lesotho. The majority (87.5%; n = 42) had received ≥2 prior ART regimens; most (81.2%) had received lopinavir/ritonavir-based ART before switch. All patients had detectable HIV RNA (median = 56,653 copies/mL). Forty seven patients (98.9%) had HIV genotype results: 41 (87.2%) had ≥1 nucleos(t)ide reverse transcriptase inhibitor (NRTI)-resistance mutation (RM), predominantly M184V (76.6%; n = 36); 31 (65.9%) had ≥1 non-NRTI-RM, including 27 (57.4%) with ≥1 ETR-RM; 30 (63.8%) had ≥3 protease inhibitor RM, including 20 (42.6%) with ≥1 DRV-RM. For new ART regimens, DRV and raltegravir were most frequently prescribed (83.3%; n = 40 on DRV and raltegravir, each). Eighteen patients (37.5%) were initiated on the NRTI-sparing ART. CONCLUSIONS In our study, a significant proportion of treatment-experienced African children and adolescents had one or more DRV-RM and ETR-RM. For the new regimen, more than a third of pediatric patients failing second-line ART were prescribed NRTI-sparing regimens. Better understanding of the current approaches to pediatric ART sequencing in resource-limited settings is needed.
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11
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Fokam J, Bellocchi MC, Armenia D, Nanfack AJ, Carioti L, Continenza F, Takou D, Temgoua ES, Tangimpundu C, Torimiro JN, Koki PN, Fokunang CN, Cappelli G, Ndjolo A, Colizzi V, Ceccherini-Silberstein F, Perno CF, Santoro MM. Next-generation sequencing provides an added value in determining drug resistance and viral tropism in Cameroonian HIV-1 vertically infected children. Medicine (Baltimore) 2018; 97:e0176. [PMID: 29595649 PMCID: PMC5895385 DOI: 10.1097/md.0000000000010176] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
With limited and low-genetic barrier drugs used for the prevention of mother-to-child transmission (PMTCT) of HIV in sub-Saharan Africa, vertically transmitted HIV-1 drug-resistance (HIVDR) is concerning and might prompt optimal pediatric strategies.The aim of this study was to ascertain HIVDR and viral-tropism in majority and minority populations among Cameroonian vertically infected children.A comparative analysis among 18 HIV-infected children (7 from PMTCT-exposed mothers and 11 from mothers without PMTCT-exposure) was performed. HIVDR and HIV-1 co-receptor usage was evaluated by analyzing sequences obtained by both Sanger sequencing and ultra-deep 454-pyrosequencing (UDPS), set at 1% threshold.Overall, median (interquartile range) age, viremia, and CD4 count were 6 (4-10) years, 5.5 (4.9-6.0) log10 copies/mL, and 526 (282-645) cells/mm, respectively. All children had wild-type viruses through both Sanger sequencing and UDPS, except for 1 PMTCT-exposed infant harboring minority K103N (8.31%), born to a mother exposed to AZT+3TC+NVP. X4-tropic viruses were found in 5 of 15 (33.3%) children (including 2 cases detected only by UDPS). Rate of X4-tropic viruses was 0% (0/6) below 5 years (also as minority species), and became relatively high above 5 years (55.6% [5/9], P = .040. X4-tropic viruses were higher with CD4 ≤15% (4/9 [44.4%]) versus CD4 >15% (1/6 [16.7%], P = .580); similarly for CD4 ≤200 (3/4 [75%]) versus CD4 >200 (2/11 [18.2%] cells/mm, P = .077.NGS has the ability of excluding NRTI- and NNRTI-mutations as minority species in all but 1 children, thus supporting the safe use of these drug-classes in those without such mutations, henceforth sparing ritonavir-boosted protease inhibitors or integrase inhibitors for the few remaining cases. In children under five years, X4-tropic variants would be rare, suggesting vertical-transmission with CCR5-tropic viruses and possible maraviroc usage at younger ages.
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Affiliation(s)
- Joseph Fokam
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
- University of Rome Tor Vergata, Rome, Italy
- University of Yaounde I
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
| | | | | | - Aubin J. Nanfack
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
- New York University School of Medicine, New York, NY
| | | | - Fabio Continenza
- National Institute for Infectious Diseases Lazzaro Spallanzani-IRCCS, Rome, Italy
| | - Desire Takou
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
| | - Edith S. Temgoua
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
| | - Charlotte Tangimpundu
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
| | - Judith N. Torimiro
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
- University of Yaounde I
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
| | - Paul N. Koki
- University of Yaounde I
- Mother-Child Center, Chantal BIYA Foundation, Yaounde
| | | | | | - Alexis Ndjolo
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
- University of Yaounde I
| | - Vittorio Colizzi
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
- University of Rome Tor Vergata, Rome, Italy
- UNESCO Board of Multidisciplinary Biotechnology, Rome, Italy
| | | | - Carlo-Federico Perno
- Chantal Biya International Reference Centre for research on HIV/AIDS Prevention and Management, Yaounde, Cameroon
- University of Rome Tor Vergata, Rome, Italy
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12
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Tadesse BT, Kinloch NN, Baraki B, Lapointe HR, Cobarrubias KD, Brockman MA, Brumme CJ, Foster BA, Jerene D, Makonnen E, Aklillu E, Brumme ZL. High Levels of Dual-Class Drug Resistance in HIV-Infected Children Failing First-Line Antiretroviral Therapy in Southern Ethiopia. Viruses 2018; 10:E60. [PMID: 29389912 PMCID: PMC5850367 DOI: 10.3390/v10020060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 01/30/2018] [Accepted: 01/30/2018] [Indexed: 11/29/2022] Open
Abstract
Clinical monitoring of pediatric HIV treatment remains a major challenge in settings where drug resistance genotyping is not routinely available. As a result, our understanding of drug resistance, and its impact on subsequent therapeutic regimens available in these settings, remains limited. We investigate the prevalence and correlates of HIV-1 drug resistance among 94 participants of the Ethiopia Pediatric HIV Cohort failing first-line combination antiretroviral therapy (cART) using dried blood spot-based genotyping. Overall, 81% (73/90) of successfully genotyped participants harbored resistance mutations, including 69% (62/90) who harbored resistance to both Nucleoside Reverse Transcriptase Inhibitors (NRTIs) and Non-nucleoside Reverse Transcriptase Inhibitors (NNRTIs). Strikingly, 42% of resistant participants harbored resistance to all four NRTIs recommended for second-line use in this setting, meaning that there are effectively no remaining cART options for these children. Longer cART duration and prior regimen changes were significantly associated with detection of drug resistance mutations. Replicate genotyping increased the breadth of drug resistance detected in 34% of cases, and thus is recommended for consideration when typing from blood spots. Implementation of timely drug resistance testing and access to newer antiretrovirals and drug classes are urgently needed to guide clinical decision-making and improve outcomes for HIV-infected children on first-line cART in Ethiopia.
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Affiliation(s)
| | - Natalie N Kinloch
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
| | - Bemuluyigza Baraki
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
| | - Hope R Lapointe
- British Columbia Centre for Excellence in HIV/AIDS, Vancouver, BC V6Z 1Y6, Canada.
| | - Kyle D Cobarrubias
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
| | - Mark A Brockman
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
- British Columbia Centre for Excellence in HIV/AIDS, Vancouver, BC V6Z 1Y6, Canada.
| | - Chanson J Brumme
- British Columbia Centre for Excellence in HIV/AIDS, Vancouver, BC V6Z 1Y6, Canada.
| | - Byron A Foster
- Departments of Dermatology and Pediatrics, Oregon Health Sciences University, Portland, OR 97239, USA.
| | - Degu Jerene
- Management Sciences for Health, Addis Ababa 1250, Ethiopia.
| | - Eyasu Makonnen
- Department of Pharmacology, College of Health Sciences, Addis Ababa University, Addis Ababa 9086, Ethiopia.
| | - Eleni Aklillu
- Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institute, Karolinska University Hospital Huddinge C1:68, Stockholm 141 86, Sweden.
| | - Zabrina L Brumme
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
- British Columbia Centre for Excellence in HIV/AIDS, Vancouver, BC V6Z 1Y6, Canada.
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Multicentre analysis of second-line antiretroviral treatment in HIV-infected children: adolescents at high risk of failure. J Int AIDS Soc 2018; 20:21930. [PMID: 28953325 PMCID: PMC5640308 DOI: 10.7448/ias.20.1.21930] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Introduction: The number of HIV-infected children and adolescents requiring second-line antiretroviral treatment (ART) is increasing in low- and middle-income countries (LMIC). However, the effectiveness of paediatric second-line ART and potential risk factors for virologic failure are poorly characterized. We performed an aggregate analysis of second-line ART outcomes for children and assessed the need for paediatric third-line ART. Methods: We performed a multicentre analysis by systematically reviewing the literature to identify cohorts of children and adolescents receiving second-line ART in LMIC, contacting the corresponding study groups and including patient-level data on virologic and clinical outcomes. Kaplan–Meier survival estimates and Cox proportional hazard models were used to describe cumulative rates and predictors of virologic failure. Virologic failure was defined as two consecutive viral load measurements >1000 copies/ml after at least six months of second-line treatment. Results: We included 12 cohorts representing 928 children on second-line protease inhibitor (PI)-based ART in 14 countries in Asia and sub-Saharan Africa. After 24 months, 16.4% (95% confidence interval (CI): 13.9–19.4) of children experienced virologic failure. Adolescents (10–18 years) had failure rates of 14.5 (95% CI 11.9–17.6) per 100 person-years compared to 4.5 (95% CI 3.4–5.8) for younger children (3–9 years). Risk factors for virologic failure were adolescence (adjusted hazard ratio [aHR] 3.93, p < 0.001) and short duration of first-line ART before treatment switch (aHR 0.64 and 0.53, p = 0.008, for 24–48 months and >48 months, respectively, compared to <24 months). Conclusions: In LMIC, paediatric PI-based second-line ART was associated with relatively low virologic failure rates. However, adolescents showed exceptionally poor virologic outcomes in LMIC, and optimizing their HIV care requires urgent attention. In addition, 16% of children and adolescents failed PI-based treatment and will require integrase inhibitors to construct salvage regimens. These drugs are currently not available in LMIC.
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14
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Ikomey GM, Assoumou MCO, Gichana JO, Njenda D, Mikasi SG, Mesembe M, Lyonga E, Jacobs GB. Observed HIV drug resistance associated mutations amongst naïve immunocompetent children in Yaoundé, Cameroon. Germs 2017; 7:178-185. [PMID: 29264355 DOI: 10.18683/germs.2017.1124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 08/29/2017] [Accepted: 10/19/2017] [Indexed: 11/08/2022]
Abstract
Introduction The emergence of drug resistance mutations (DRMs) has been a major threat for successful lifelong combination antiretroviral therapy (cART), especially for HIV-vertically infected children within the context of the prevention of mother-to-child transmission (PMTCT). This study aimed to evaluate DRMs amongst immune competent treatment-naïve children in Cameroon. Methods A cross-sectional study was conducted between 2015 and 2016 amongst 55 proxy consented HIV-1 positive children, aged 9 months to 6 years. They were all immune competent, cART naïve and with unknown history of PMTCT. CD4 cell counts and genotypic drug resistance testing were performed using standard methods. Results Levels of DRMs to protease (PR) inhibitors (PIs), nucleoside reverse transcriptase inhibitors (NRTIs) and non-NRTIs were 27.6%, 3.7% and 40.7%, respectively. Only minor DRMs were observed for PR. The observed mutations for NRTI were K65R, T215I and K219E (33.0% each) and for NNRTI: V106M, Y181C and Y188H (6.0% each). Only minor accessory mutations were found in the integrase (IN) region. Conclusion Despite widely available cART we still observe naïve HIV children, especially from the rural communities. We observe that a proportion of study participants had HIV-1 drug resistance associated mutations (RAMs). Data generated could help strengthen the current PMTCT programmes within the country. There is a need to upscale approaches for drug resistance testing for children in Cameroon and many other resource-limited settings.
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Affiliation(s)
- George Mondinde Ikomey
- PhD, Center for the Study and Control of Communicable Diseases (CSCCD), Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, PO Box 8445, Yaoundé, Cameroon
| | - Marie Claire Okomo Assoumou
- PhD, Center for the Study and Control of Communicable Diseases (CSCCD) Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, PO Box 8445, Yaoundé, Cameroon
| | - Josiah Otwoma Gichana
- BSc, Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Tygerberg 7505, South Africa
| | - Duncan Njenda
- MSc, Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Tygerberg 7505, South Africa
| | - Sello Given Mikasi
- MSc, Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Tygerberg 7505, South Africa
| | - Martha Mesembe
- BSc, Center for the Study and Control of Communicable Diseases (CSCCD) Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, PO Box 8445, Yaoundé, Cameroon
| | - Emilia Lyonga
- MSc, Center for the Study and Control of Communicable Diseases (CSCCD) Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, PO Box 8445, Yaoundé, Cameroon
| | - Graeme Brendon Jacobs
- PhD, Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Tygerberg 7505, South Africa
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15
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Adawaye C, Fokam J, Kamangu E, Alio HM, Chahad AM, Susin F, Moussa AM, Bertin THZ, Tidjani A, Vaira D, Moutschen M. Virological response, HIV-1 drug resistance mutations and genetic diversity among patients on first-line antiretroviral therapy in N'Djamena, Chad: findings from a cross-sectional study. BMC Res Notes 2017; 10:589. [PMID: 29126456 PMCID: PMC5681824 DOI: 10.1186/s13104-017-2893-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 10/31/2017] [Indexed: 11/25/2022] Open
Abstract
Background The national antiretroviral therapy in the Republic of Chad provides free of charge antiretroviral regimens and therapeutic monitoring for patients receiving antiretroviral therapy nationwide. For a successful programmatic uptake, these efforts merit to be supported by thorough assessments of antiretroviral therapy response and HIV-1 drug resistance surveillance, especially with risks of cross-resistance due to the gradual stavudine phasing out in such national settings. We therefore evaluated the virological response to antiretroviral therapy, HIV-1 drug resistance emergence and circulating HIV-1 clades in a Chad context. A cross-sectional and prospective study was conducted among 116 patients (41 [δ ± 6.87] years, 59% female) receiving first-line antiretroviral therapy for ≥ 6 months in Ndjamena, Chad, in 2011–2012, enrolled consecutively. To ensure accuracy, plasma viral load was concomitantly measured using Abbott Real-Time and Cobas AmpliPrep/TaqMan (v2.0), and virological failure defined as ≥ 1000 HIV-1 RNA copies/ml. Plasma from patients experiencing virological failure were processed for sequencing of HIV-1 protease-reverse transcriptase using the ANRS-AC.11 resistance testing protocol; drug resistant mutations were interpreted using the ANRS-AC11 algorithm; and phylogenetic analysis was performed using MEGA.v.6. Results Majority of patients was receiving zidovudine plus lamivudine plus nevirapine (46%), stavudine plus lamivudine plus nevirapine (41%) and tenofovir plus emtricitabine plus efavirenz (11%), for a median time-on-treatment of 5 [IQR 4–7] years. The rate of virological failure was 43% (50/116), with 86% (43/50) sequencing performance. Overall, 32% (37/116) patients presented ≥ one major drug resistant mutation(s), with 29% (34/116) to nucleos(t)ide reverse transcriptase inhibitors (67% [29/43] M184V/I, 30% [13/43] T215Y/F, 19% [8/43] V75A/F/I/L/M, 9% [4/43] K70P/R/W, 9% [4/43] K219E/N/Q and 5% [2/43] A62V); 86% (37/43) to non-nulceos(t)ide reverse transcriptase inhibitors (30% [13/43] K103N/S/E, 26% [11/43] Y181C/V/F/L, 2% [1/43] L100I, 2% [1/43] F227L, 2% [1/43] P225H); and 2% (1/43) to protease inhibitors (M46I, I54V, V82S). Six HIV-1 subtypes were found: 30% circulating recombinant form (CRF02_AG), 30% J, 16% G, 9% A, 9% D, 5% F. Conclusions In Chad, almost half of patients are failing first-line antiretroviral therapy after 5 years, with considerable drug resistant mutations at failure. Absence of K65R supports the use of tenofovir-containing regimens as preferred first-line and as suitable drug for second-line combinations, in this setting with significant HIV-1 genetic diversity. Electronic supplementary material The online version of this article (10.1186/s13104-017-2893-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Chatté Adawaye
- Institut National Supérieur des Sciences et Techniques d'Abéché, Abéché, Chad.
| | - Joseph Fokam
- Virology Laboratory, Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management, Yaoundé, Cameroon. .,Department of Experimental Medicine and Surgery, Faculty of Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy. .,Faculty of Medicine and biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon. .,National HIV Drug Resistance Working Group, Ministry of Public Health, Yaoundé, Cameroon.
| | - Erick Kamangu
- Département des Sciences de Base, Faculté de Médecine, Université de Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Hamit Mahamat Alio
- Faculté des Sciences de la Santé Humaine/Hôpital Général de Référence Nationale, Ndjamena, Chad
| | | | - Fabrice Susin
- Laboratoire de Référence SIDA, CHU de Liège, Liège, Belgium
| | - Ali Mahamat Moussa
- Faculté des Sciences de la Santé Humaine/Hôpital Général de Référence Nationale, Ndjamena, Chad
| | | | - Abdelsalam Tidjani
- Faculté des Sciences de la Santé Humaine/Hôpital Général de Référence Nationale, Ndjamena, Chad
| | - Dolores Vaira
- Laboratoire de Référence SIDA, CHU de Liège, Liège, Belgium
| | - Michel Moutschen
- Service des Maladies Infectieuses et Médecine Interne Générale, Centre Hospitalier et Universitaire de Liège, Liège, Belgium
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16
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Predictors of Virologic Failure on First-line Antiretroviral Therapy Among Children in a Referral Pediatric Center in Cameroon. Pediatr Infect Dis J 2017; 36:1067-1072. [PMID: 28661967 DOI: 10.1097/inf.0000000000001672] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Suboptimal response to antiretroviral therapy (ART) is common among children living with HIV (CLHIV) in resource-limited settings. We sought to assess virologic failure (VF), time for switching to second-line regimens and factors associated with VF in CLHIV receiving first-line ART in Cameroon. METHODS An observational cohort study was conducted in 375 CLHIV initiating a first-line ART and treated for ≥6 months at the National Social Insurance Fund Hospital in Yaoundé-Cameroon from 2009 to 2013. Using logistic regression, predictors of VF and delayed switch were assessed by univariate and multivariate analysis. P < 0.05 was considered statistically significant. RESULTS Overall, 17% (64/375) CLHIV experienced VF on first-line ART after a median time of 28 (interquartile range: 22-38) months. After VF, median time to switching from first- to second-line ART was 20 (interquartile range: 8-24) months. In multivariate analysis, VF was associated with male gender (adjusted odds ratio: 0.36; 95% confidence interval: 0.19-0.71; P = 0.003), motherless children (adjusted odds ratio: 2.9; 95% confidence interval: 1.3-6.06; P = 0.005) and treatment with stavudine-containing compared with zidovudine-containing regimens (P = 0.022). Overall, male gender, orphanhood (motherless) and treatment with stavudine-containing regimens predicted VF at a rate of 70% (area under curve =0.70). CONCLUSION VF on first-line pediatric ART is common, and switching children failing first-line to second-line ART is considerably delayed. These results suggest performance of pediatric ART program can be improved by targeting orphans, adapting counseling for male children, complete phasing-out of stavudine and ensuring timely switch to second-line regimens.
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17
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Mouafo LCM, Dambaya B, Ngoufack NN, Nkenfou CN. Host Molecular Factors and Viral Genotypes in the Mother-to-Child HIV-1 Transmission in Sub-Saharan Africa. J Public Health Afr 2017; 8:594. [PMID: 28748061 PMCID: PMC5510234 DOI: 10.4081/jphia.2017.594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 05/02/2017] [Indexed: 12/22/2022] Open
Abstract
Maternal viral load and immune status, timing and route of delivery, viral subtype, and host genetics are known to influence the transmission, acquisition and disease progression of human immunodeficiency virus-1 (HIV-1) infection. This review summarizes the findings from published works on host molecular factors and virus genotypes affecting mother to child transmission (MTCT) in Africa and identifies the gaps that need to be addressed in future research. Articles in PubMed, Google and AIDSearch and relevant conference abstracts publications were searched. Accessible articles on host factors and viral genetics impacting the MTCT of HIV, done on African populations till 2015 were downloaded. Forty-six articles were found and accessed; 70% described host genes impacting the transmission. The most studied gene was the CCR5 promoter, followed by the CCR2-64I found to reduce MTCT; then SDF1-3’A shown to have no effect on MTCT and others like the DC-SIGNR, CD4, CCL3 and IP-10. The HLA class I was most studied and was generally linked to the protective effect on MTCT. Breast milk constituents were associated to protection against MTCT. However, existing studies in Sub Saharan Africa were done just in few countries and some done without control groups. Contradictory results obtained may be due to different genetic background, type of controls, different socio-cultural and economic environment and population size. More studies are thus needed to better understand the mechanism of transmission or prevention.
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Affiliation(s)
- Linda Chapdeleine M Mouafo
- Department of Biochemistry, University of Dschang, Yaoundé, Cameroon.,Systems Biology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management, Yaoundé, Cameroon
| | - Béatrice Dambaya
- Systems Biology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management, Yaoundé, Cameroon.,Department of Animal Sciences, University of Yaounde 1, Cameroon
| | - Nicole N Ngoufack
- Systems Biology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management, Yaoundé, Cameroon.,Department of Biochemistry, University of Yaounde 1, Cameroon
| | - Céline N Nkenfou
- Systems Biology Laboratory, Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management, Yaoundé, Cameroon.,Higher Teachers' Training College, University of Yaounde 1, Cameroon
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18
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Multimethod Longitudinal HIV Drug Resistance Analysis in Antiretroviral-Therapy-Naive Patients. J Clin Microbiol 2017; 55:2785-2800. [PMID: 28659324 DOI: 10.1128/jcm.00634-17] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 06/27/2017] [Indexed: 11/20/2022] Open
Abstract
The global intensification of antiretroviral therapy (ART) can lead to increased rates of HIV drug resistance (HIVDR) mutations in treated and also in ART-naive patients. ART-naive HIV-1-infected patients from Cameroon were subjected to a multimethod HIVDR analysis using amplification-refractory mutation system (ARMS)-PCR, Sanger sequencing, and longitudinal next-generation sequencing (NGS) to determine their profiles for the mutations K103N, Y181C, K65R, M184V, and T215F/Y. We processed 66 ART-naive HIV-1-positive patients with highly diverse subtypes that underlined the predominance of CRF02_AG and the increasing rate of F2 and other recombinant forms in Cameroon. We compared three resistance testing methods for 5 major mutation sites. Using Sanger sequencing, the overall prevalence of HIVDR mutations was 7.6% (5/66) and included all studied mutations except K65R. Comparing ARMS-PCR with Sanger sequencing as a reference, we obtained a sensitivity of 100% (5/5) and a specificity of 95% (58/61), caused by three false-positive calls with ARMS-PCR. For 32/66 samples, we obtained NGS data and we observed two additional mismatches made up of minority variants (7% and 18%) that might not be clinically relevant. Longitudinal NGS analyses revealed changes in HIVDR mutations in all five positive subjects that could not be attributed to treatment. In one of these cases, superinfection led to the temporary masking of a resistant virus. HIVDR mutations can be sensitively detected by ARMS-PCR and sequencing methods with comparable performances. Longitudinal changes in HIVDR mutations have to be considered even in the absence of treatment.
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19
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Boerma RS, Sigaloff KCE, Akanmu AS, Inzaule S, Boele van Hensbroek M, Rinke de Wit TF, Calis JC. Alarming increase in pretreatment HIV drug resistance in children living in sub-Saharan Africa: a systematic review and meta-analysis. J Antimicrob Chemother 2016; 72:365-371. [PMID: 27999070 DOI: 10.1093/jac/dkw463] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/28/2016] [Accepted: 10/02/2016] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Children have an augmented risk of pretreatment HIV drug resistance (PDR) due to exposure to antiretroviral drugs for the prevention of mother-to-child transmission (PMTCT). Paediatric data are essential to evaluate the effectiveness of the restricted number of paediatric regimens currently available, but these data are scarce. METHODS We conducted a systematic review of the literature on PDR in children (median age ≤12 years) in sub-Saharan Africa. We separately extracted the proportion of children with PDR for children with and without prior PMTCT exposure, used random-effects meta-analysis to pool proportions and used meta-regression to assess subgroup differences. RESULTS We included 19 studies representing 2617 children from 13 countries. The pooled PDR prevalence was 42.7% (95% CI 26.2%-59.1%) among PMTCT-exposed children and 12.7% (95% CI 6.7%-18.7%) among PMTCT-unexposed children (P = 0.004). The PDR prevalence in PMTCT-unexposed children increased from 0% in 2004 to 26.8% in 2013 (P = 0.009). NNRTI mutations were detected in 32.4% (95% CI 18.7%-46.1%) of PMTCT-exposed children and in 9.7% (95% CI 4.6%-14.8%) of PMTCT-unexposed children; PI mutations were uncommon (<2.5%). PDR was more common in children aged <3 years compared with children aged ≥3 years [40.9% (95% CI 27.6%-54.3%) versus 17.6% (95% CI 8.9%-26.3%), respectively (P = 0.025)]. CONCLUSIONS The PDR prevalence in African children is high and rapidly increasing. Even in PMTCT-unexposed children, the most recent reports indicate that PDR is present in up to a third of children starting first-line therapy. Our data underscore the importance of initiating PI-based first-line ART in young children (<3 years of age) and suggest that older children may also benefit from this approach.
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Affiliation(s)
- R S Boerma
- Amsterdam Institute for Global Health and Development & Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands .,Global Child Health Group, Emma Children's Hospital, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands
| | - K C E Sigaloff
- Amsterdam Institute for Global Health and Development & Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands.,Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - A S Akanmu
- Department of Haematology, University Teaching Hospital, University of Lagos, Lagos, Nigeria
| | - S Inzaule
- Amsterdam Institute for Global Health and Development & Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands
| | - M Boele van Hensbroek
- Global Child Health Group, Emma Children's Hospital, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands
| | - T F Rinke de Wit
- Amsterdam Institute for Global Health and Development & Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands
| | - J C Calis
- Global Child Health Group, Emma Children's Hospital, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands.,Department of Pediatric Intensive Care, Emma Children's Hospital, Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands
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20
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Billong SC, Fokam J, Penda CI, Amadou S, Kob DS, Billong EJ, Colizzi V, Ndjolo A, Bisseck ACZK, Elat JBN. Predictors of poor retention on antiretroviral therapy as a major HIV drug resistance early warning indicator in Cameroon: results from a nationwide systematic random sampling. BMC Infect Dis 2016; 16:678. [PMID: 27846809 PMCID: PMC5111226 DOI: 10.1186/s12879-016-1991-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 10/29/2016] [Indexed: 01/09/2023] Open
Abstract
Background Retention on lifelong antiretroviral therapy (ART) is essential in sustaining treatment success while preventing HIV drug resistance (HIVDR), especially in resource-limited settings (RLS). In an era of rising numbers of patients on ART, mastering patients in care is becoming more strategic for programmatic interventions. Due to lapses and uncertainty with the current WHO sampling approach in Cameroon, we thus aimed to ascertain the national performance of, and determinants in, retention on ART at 12 months. Methods Using a systematic random sampling, a survey was conducted in the ten regions (56 sites) of Cameroon, within the “reporting period” of October 2013–November 2014, enrolling 5005 eligible adults and children. Performance in retention on ART at 12 months was interpreted following the definition of HIVDR early warning indicator: excellent (>85%), fair (85–75%), poor (<75); and factors with p-value < 0.01 were considered statistically significant. Results Majority (74.4%) of patients were in urban settings, and 50.9% were managed in reference treatment centres. Nationwide, retention on ART at 12 months was 60.4% (2023/3349); only six sites and one region achieved acceptable performances. Retention performance varied in reference treatment centres (54.2%) vs. management units (66.8%), p < 0.0001; male (57.1%) vs. women (62.0%), p = 0.007; and with WHO clinical stage I (63.3%) vs. other stages (55.6%), p = 0.007; but neither for age (adults [60.3%] vs. children [58.8%], p = 0.730) nor for immune status (CD4351–500 [65.9%] vs. other CD4-staging [59.86%], p = 0.077). Conclusions Poor retention in care, within 12 months of ART initiation, urges active search for lost-to-follow-up targeting preferentially male and symptomatic patients, especially within reference ART clinics. Such sampling strategy could be further strengthened for informed ART monitoring and HIVDR prevention perspectives. Electronic supplementary material The online version of this article (doi:10.1186/s12879-016-1991-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Serge Clotaire Billong
- National HIV drug resistance surveillance and prevention Working Group (HIVDR-WG), Ministry of Public Health, Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé 1, Yaoundé, Cameroon.,National AIDS Control Committee, Ministry of Public Health, Yaoundé, Cameroon
| | - Joseph Fokam
- National HIV drug resistance surveillance and prevention Working Group (HIVDR-WG), Ministry of Public Health, Yaoundé, Cameroon. .,Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé 1, Yaoundé, Cameroon. .,Chantal BIYA International Reference Centre (CIRCB) for research on HIV/AIDS prevention and management, Ministry of Public Health, Yaoundé, Cameroon. .,Department of Experimental Medicine and Surgery, Faculty of Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy.
| | - Calixte Ida Penda
- Faculty of Medicine and Pharmaceutical sciences (FMSP), University of Douala, Douala, Cameroon.,Laquintinie Hospital of Douala, Douala, Cameroon
| | - Salmon Amadou
- National AIDS Control Committee, Ministry of Public Health, Yaoundé, Cameroon
| | - David Same Kob
- National AIDS Control Committee, Ministry of Public Health, Yaoundé, Cameroon
| | - Edson-Joan Billong
- Faculty of Medicine, University of Antananarivo, Antananarivo, Madagascar
| | - Vittorio Colizzi
- Chantal BIYA International Reference Centre (CIRCB) for research on HIV/AIDS prevention and management, Ministry of Public Health, Yaoundé, Cameroon.,UNESCO Biotechnology Multidisciplinary Board, and Department of Biology and Pathology, Faculty of Sciences, University of Rome Tor Vergata, Rome, Italy
| | - Alexis Ndjolo
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé 1, Yaoundé, Cameroon.,Chantal BIYA International Reference Centre (CIRCB) for research on HIV/AIDS prevention and management, Ministry of Public Health, Yaoundé, Cameroon
| | - Anne-Cecile Zoung-Kani Bisseck
- National HIV drug resistance surveillance and prevention Working Group (HIVDR-WG), Ministry of Public Health, Yaoundé, Cameroon.,Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé 1, Yaoundé, Cameroon.,Division of Operational Health Research, Ministry of Public Health, Yaounde, Cameroon
| | - Jean-Bosco Nfetam Elat
- National HIV drug resistance surveillance and prevention Working Group (HIVDR-WG), Ministry of Public Health, Yaoundé, Cameroon.,National AIDS Control Committee, Ministry of Public Health, Yaoundé, Cameroon
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High levels of pre-treatment HIV drug resistance and treatment failure in Nigerian children. J Int AIDS Soc 2016; 19:21140. [PMID: 27836020 PMCID: PMC5106466 DOI: 10.7448/ias.19.1.21140] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 09/09/2016] [Accepted: 10/06/2016] [Indexed: 12/03/2022] Open
Abstract
Introduction Pre-treatment HIV drug resistance (PDR) is an increasing problem in sub-Saharan Africa. Children are an especially vulnerable population to develop PDR given that paediatric second-line treatment options are limited. Although monitoring of PDR is important, data on the paediatric prevalence in sub-Saharan Africa and its consequences for treatment outcomes are scarce. We designed a prospective paediatric cohort study to document the prevalence of PDR and its effect on subsequent treatment failure in Nigeria, the country with the second highest number of HIV-infected children in the world. Methods HIV-1-infected children ≤12 years, who had not been exposed to drugs for the prevention of mother-to-child transmission (PMTCT), were enrolled between 2012 and 2013, and followed up for 24 months in Lagos, Nigeria. Pre-antiretroviral treatment (ART) population-based pol genotypic testing and six-monthly viral load (VL) testing were performed. Logistic regression analysis was used to assess the effect of PDR (World Health Organization (WHO) list for transmitted drug resistance) on subsequent treatment failure (two consecutive VL measurements >1000 cps/ml or death). Results Of the total 82 PMTCT-naïve children, 13 (15.9%) had PDR. All 13 children harboured non-nucleoside reverse transcriptase inhibitor (NNRTI) mutations, of whom seven also had nucleoside reverse transcriptase inhibitor resistance. After 24 months, 33% had experienced treatment failure. Treatment failure was associated with PDR and a higher log VL before treatment initiation (adjusted odds ratio (aOR) 7.53 (95%CI 1.61–35.15) and 2.85 (95%CI 1.04–7.78), respectively). Discussion PDR was present in one out of six Nigerian children. These high numbers corroborate with recent findings in other African countries. The presence of PDR was relevant as it was the strongest predictor of first-line treatment failure. Conclusions Our findings stress the importance of implementing fully active regimens in children living with HIV. This includes the implementation of protease inhibitor (PI)-based first-line ART, as is recommended by the WHO for all HIV-infected children <3 years of age. Overcoming practical barriers to implement PI-based regimens is essential to ensure optimal treatment for HIV-infected children in sub-Saharan Africa. In countries where individual VL or resistance testing is not possible, more attention should be given to paediatric PDR surveys.
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Ngo-Giang-Huong N, Wittkop L, Judd A, Reiss P, Goetghebuer T, Duiculescu D, Noguera-Julian A, Marczynska M, Giacquinto C, Ene L, Ramos JT, Cellerai C, Klimkait T, Brichard B, Valerius N, Sabin C, Teira R, Obel N, Stephan C, de Wit S, Thorne C, Gibb D, Schwimmer C, Campbell MA, Pillay D, Lallemant M. Prevalence and effect of pre-treatment drug resistance on the virological response to antiretroviral treatment initiated in HIV-infected children - a EuroCoord-CHAIN-EPPICC joint project. BMC Infect Dis 2016; 16:654. [PMID: 27825316 PMCID: PMC5101717 DOI: 10.1186/s12879-016-1968-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 10/25/2016] [Indexed: 12/14/2022] Open
Abstract
Background Few studies have evaluated the impact of pre-treatment drug resistance (PDR) on response to combination antiretroviral treatment (cART) in children. The objective of this joint EuroCoord-CHAIN-EPPICC/PENTA project was to assess the prevalence of PDR mutations and their association with virological outcome in the first year of cART in children. Methods HIV-infected children <18 years initiating cART between 1998 and 2008 were included if having at least one genotypic resistance test prior to cART initiation. We used the World Health Organization 2009 resistance mutation list and Stanford algorithm to infer resistance to prescribed drugs. Time to virological failure (VF) was defined as the first of two consecutive HIV-RNA > 500 copies/mL after 6 months cART and was assessed by Cox proportional hazards models. All models were adjusted for baseline demographic, clinical, immunology and virology characteristics and calendar period of cART start and initial cART regimen. Results Of 476 children, 88 % were vertically infected. At cART initiation, median (interquartile range) age was 6.6 years (2.1–10.1), CD4 cell count 297 cells/mm3 (98–639), and HIV-RNA 5.2 log10copies/mL (4.7–5.7). Of 37 children (7.8 %, 95 % confidence interval (CI), 5.5–10.6) harboring a virus with ≥1 PDR mutations, 30 children had a virus resistant to ≥1 of the prescribed drugs. Overall, the cumulative Kaplan-Meier estimate for virological failure was 19.8 % (95 %CI, 16.4–23.9). Cumulative risk for VF tended to be higher among children harboring a virus with PDR and resistant to ≥1 drug prescribed than among those receiving fully active cART: 32.1 % (17.2–54.8) versus 19.4 % (15.9–23.6) (P = 0.095). In multivariable analysis, age was associated with a higher risk of VF with a 12 % reduced risk per additional year (HR 0.88; 95 %CI, 0.82–0.95; P < 0.001). Conclusions PDR was not significantly associated with a higher risk of VF in children in the first year of cART. The risk of VF decreased by 12 % per additional year at treatment initiation which may be due to fading of PDR mutations over time. Lack of appropriate formulations, in particular for the younger age group, may be an important determinant of virological failure. Electronic supplementary material The online version of this article (doi:10.1186/s12879-016-1968-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nicole Ngo-Giang-Huong
- IRD UMI 174 - PHPT-Faculty of Associated Medical Sciences, Chiang Mai University, 110, Intrawarorot Road, Sripoom, Muang, Chiang Mai, 50200, Thailand. .,Harvard T.H. Chan School of Public Health, Boston, USA.
| | - Linda Wittkop
- Univ. Bordeaux, ISPED; INSERM, Centre INSERM U1219; CHU de Bordeaux, Pole de Sante Publique, F-33000, Bordeaux, France
| | - Ali Judd
- Medical Research Council Clinical Trials Unit, University College London, London, UK
| | - Peter Reiss
- Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | | | - Dan Duiculescu
- "Dr. Victor Babes" Hospital for Infectious and Tropical Diseases, Bucharest, Romania
| | | | | | | | - Luminita Ene
- "Dr. Victor Babes" Hospital for Infectious and Tropical Diseases, Bucharest, Romania
| | | | | | | | | | - Niels Valerius
- Hvidovre Hospital, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Niels Obel
- Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | | | | | - Claire Thorne
- University College London, Institute of Child Health, London, UK
| | - Diana Gibb
- Medical Research Council Clinical Trials Unit, London, UK
| | | | | | | | - Marc Lallemant
- IRD UMI 174 - PHPT-Faculty of Associated Medical Sciences, Chiang Mai University, 110, Intrawarorot Road, Sripoom, Muang, Chiang Mai, 50200, Thailand
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Kityo C, Sigaloff KCE, Boender TS, Kaudha E, Kayiwa J, Musiime V, Mukuye A, Kiconco M, Nankya I, Nakatudde-Katumba L, Calis JC, Rinke de Wit TF, Mugyenyi PN. HIV Drug Resistance Among Children Initiating First-Line Antiretroviral Treatment in Uganda. AIDS Res Hum Retroviruses 2016; 32:628-35. [PMID: 26723018 PMCID: PMC4931746 DOI: 10.1089/aid.2015.0215] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background: There are limited data on primary human immunodeficiency virus drug resistance (HIVDR) in pediatric populations. This study aimed to assess the prevalence of primary HIVDR and associated risk factors among children initiating first-line antiretroviral therapy (ART) in Uganda. Methods: At three Ugandan clinics, children (age <12 years) requiring ART were recruited between January 2010 and August 2011. Before starting ART, blood was collected for viral load and pol gene sequencing. Drug resistance mutations were determined using the 2010 International AIDS Society–USA mutation list. Risk factors for HIVDR were assessed with multivariate regression analysis. Results: Three hundred nineteen HIV-infected children with a median age of 4.9 years were enrolled. Sequencing was successful in 279 children (87.5%). HIVDR was present in 10% of all children and 15.2% of children <3 years. Nucleoside reverse transcriptase inhibitors (NRTIs), non-NRTI (NNRTI), and dual-class resistance was present in 5.7%, 7.5%, and 3.2%, respectively. HIVDR occurred in 35.7% of prevention of mother-to-child transmission (PMTCT)–exposed children, 15.6% in children with unknown PMTCT history, and 7.7% among antiretroviral-naive children. History of PMTCT exposure [adjusted odds ratio (AOR): 2.6, 95% CI: 1.3–5.1] or unknown PMTCT status (AOR: 3.8, 95% CI: 1.1–13.5), low CD4 (AOR: 2.2, 95% CI: 1.3–3.6), current breastfeeding (AOR: 7.4, 95% CI: 2.6–21), and current maternal ART use (AOR: 6.4, 95% CI: 3.4–11.9) emerged as risk factors for primary HIVDR in multivariate analysis. Conclusion: Pretreatment HIVDR is high, especially in children with PMTCT exposure. Protease inhibitor (PI)–based regimens are advocated by the World Health Organization, but availability in children is limited. Children with (unknown) PMTCT exposure, low CD4 count, current breastfeeding, or maternal ART need to be prioritized to receive PI-based regimens.
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Affiliation(s)
- Cissy Kityo
- Joint Clinical Research Centre (JCRC), Kampala, Uganda
| | - Kim Catherina Eve Sigaloff
- Amsterdam Institute for Global Health and Development, Amsterdam, the Netherlands
- Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, the Netherlands
| | - Tamara Sonia Boender
- Amsterdam Institute for Global Health and Development, Amsterdam, the Netherlands
- Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, the Netherlands
| | | | - Joshua Kayiwa
- Joint Clinical Research Centre (JCRC), Kampala, Uganda
| | | | - Andrew Mukuye
- Joint Clinical Research Centre (JCRC), Kampala, Uganda
| | - Mary Kiconco
- Joint Clinical Research Centre (JCRC), Kampala, Uganda
| | | | | | - Job C.J. Calis
- Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, the Netherlands
- Emma Children's Hospital, Academic Medical Centre, Amsterdam, the Netherlands
| | - Tobias F. Rinke de Wit
- Amsterdam Institute for Global Health and Development, Amsterdam, the Netherlands
- Department of Global Health, Academic Medical Center of the University of Amsterdam, Amsterdam, the Netherlands
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Nlend AEN, Lyeb S, Moyo STN, Motaze AN. Viral Monitoring and Prevalence of Viral Failure in HIV-1 Infected Children under First Line Antiretroviral Therapy during the First 60 Months of Treatment in Yaoundé, Cameroon: A Serial Cross Sectional Analysis. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/ojped.2016.61012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Jenabian MA, Costiniuk CT, Mboumba Bouassa RS, Chapdeleine Mekue Mouafo L, Brogan TV, Bélec L. Tackling virological failure in HIV-infected children living in Africa. Expert Rev Anti Infect Ther 2015. [PMID: 26204960 DOI: 10.1586/14787210.2015.1068117] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Drug resistance in HIV-infected children is one of the main contributors to antiretroviral treatment (ART) failure, especially in developing countries. Sub-Saharan Africa has the largest burden of pediatric HIV infection in the world. Herein, we systematically review the current status of ART failure in HIV-infected African children. A literature search for publications within 10 years was performed through PubMed to identify relevant articles. Included studies examined the impact of timing of ART initiation, criteria for diagnosing therapeutic failure, predictors of therapeutic failure, management strategies and future directions to minimize failure rates in these pediatric populations. Although there is scale-up of ART programs in Africa, novel therapeutic and management strategies are needed to overcome current challenges.
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Affiliation(s)
- Mohammad-Ali Jenabian
- a 1 Département des Sciences Biologiques et Centre de recherche BioMed, Université du Québec à Montréal (UQAM), Montreal, QC, Canada
| | - Cecilia T Costiniuk
- b 2 Chronic Viral Illnesses Service and Division of Infectious Diseases, McGill University Health Centre, Montreal, QC, Canada
| | - Ralph-Sydney Mboumba Bouassa
- c 3 Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Laboratoire de Virologie, and Faculté de Médecine Paris Descartes, Université Paris V, Paris Sorbonne Cité, Paris, France
| | - Linda Chapdeleine Mekue Mouafo
- c 3 Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Laboratoire de Virologie, and Faculté de Médecine Paris Descartes, Université Paris V, Paris Sorbonne Cité, Paris, France
| | - Thomas V Brogan
- d 4 Seattle Children's Hospital, University of Washington School of Medicine, Seattle, WA, USA
| | - Laurent Bélec
- c 3 Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Laboratoire de Virologie, and Faculté de Médecine Paris Descartes, Université Paris V, Paris Sorbonne Cité, Paris, France
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26
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Tongo M, Essomba RG, Nindo F, Abrahams F, Nanfack AJ, Fokam J, Takou D, Torimiro JN, Mpoudi-Ngole E, Burgers WA, Martin DP, Dorfman JR. Phylogenetics of HIV-1 subtype G env: Greater complexity and older origins than previously reported. INFECTION GENETICS AND EVOLUTION 2015; 35:9-18. [PMID: 26190450 DOI: 10.1016/j.meegid.2015.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 07/06/2015] [Accepted: 07/07/2015] [Indexed: 12/16/2022]
Abstract
HIV-1 subtype G has played an early and central role in the emergent complexity of the HIV-1 group M (HIV-1M) epidemic in central/west Africa. Here, we analysed new subtype G env sequences sampled from 8 individuals in Yaoundé, Cameroon during 2007-2010, together with all publically available subtype G-attributed full-length env sequences with known sampling dates and locations. We inferred that the most recent common ancestor (MRCA) of the analysed subtype G env sequences most likely occurred in ∼1953 (95% Highest Posterior Density interval [HPD] 1939-1963): about 15 years earlier than previous estimates. We found that the subtype G env phylogeny has a complex structure including seven distinct lineages, each likely dating back to the late 1960s or early 1970s. Sequences from Angola, Gabon and the Democratic Republic of Congo failed to group consistently in these lineages, possibly because they are related to more ancient sequences that are poorly sampled. The circulating recombinant form (CRF), CRF06_cpx env sequences but not CRF25_cpx env sequences are phylogenetically nested within the subtype G clade. This confirms that the CRF06_cpx env plausibly was derived through recombination from a subtype G parent, and suggests that the CRF25_cpx env was likely derived from an HIV-1M lineage related to the MRCA of subtype G that has remained undiscovered and may be extinct. Overall, this fills important gaps in our knowledge of the early events in the spread of HIV-1M.
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Affiliation(s)
- Marcel Tongo
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town, South Africa; Division of Immunology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa; Division of Medical Virology, Faculty of Health Sciences, and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa; Institute of Medical Research and Study of Medicinal plants (IMPM), Yaoundé, Cameroon
| | - René G Essomba
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town, South Africa; Division of Immunology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Frederick Nindo
- Computational Biology Group, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Fatima Abrahams
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town, South Africa
| | - Aubin Joseph Nanfack
- Centre International de Référence «Chantal Biya» pour la recherche sur la prévention et la prise en charge du VIH/SIDA (CIRCB), Yaoundé, Cameroon
| | - Joseph Fokam
- Centre International de Référence «Chantal Biya» pour la recherche sur la prévention et la prise en charge du VIH/SIDA (CIRCB), Yaoundé, Cameroon; Faculty of Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy
| | - Desire Takou
- Centre International de Référence «Chantal Biya» pour la recherche sur la prévention et la prise en charge du VIH/SIDA (CIRCB), Yaoundé, Cameroon
| | - Judith N Torimiro
- Centre International de Référence «Chantal Biya» pour la recherche sur la prévention et la prise en charge du VIH/SIDA (CIRCB), Yaoundé, Cameroon; Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
| | - Eitel Mpoudi-Ngole
- Institute of Medical Research and Study of Medicinal plants (IMPM), Yaoundé, Cameroon
| | - Wendy A Burgers
- Division of Medical Virology, Faculty of Health Sciences, and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Darren P Martin
- Computational Biology Group, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Jeffrey R Dorfman
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town, South Africa; Division of Immunology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
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Fokam J, Elat JBN, Billong SC, Kembou E, Nkwescheu AS, Obam NM, Essiane A, Torimiro JN, Ekanmian GK, Ndjolo A, Shiro KS, Bissek ACZK. Monitoring HIV Drug Resistance Early Warning Indicators in Cameroon: A Study Following the Revised World Health Organization Recommendations. PLoS One 2015; 10:e0129210. [PMID: 26083364 PMCID: PMC4471113 DOI: 10.1371/journal.pone.0129210] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 05/07/2015] [Indexed: 11/18/2022] Open
Abstract
Background The majority (>95%) of new HIV infection occurs in resource-limited settings, and Cameroon is still experiencing a generalized epidemic with ~122,638 patients receiving antiretroviral therapy (ART). A detrimental outcome in scaling-up ART is the emergence HIV drug resistance (HIVDR), suggesting the need for pragmatic approaches in sustaining a successful ART performance. Methods A survey was conducted in 15 ART sites of the Centre and Littoral regions of Cameroon in 2013 (10 urban versus 05 rural settings; 8 at tertiary/secondary versus 7 at primary healthcare levels), evaluating HIVDR-early warning indicators (EWIs) as-per the 2012 revised World Health Organization’s guidelines: EWI1 (on-time pill pick-up), EWI2 (retention in care), EWI3 (no pharmacy stock-outs), EWI4 (dispensing practices), EWI5 (virological suppression). Poor performance was interpreted as potential HIVDR. Results Only 33.3% (4/12) of sites reached the desirable performance for “on-time pill pick-up” (57.1% urban versus 0% rural; p<0.0001) besides 25% (3/12) with fair performance. 69.2% (9/13) reached the desirable performance for “retention in care” (77.8% urban versus 50% rural; p=0.01) beside 7.7% (1/13) with fair performance. Only 14.4% (2/13) reached the desirable performance of “no pharmacy stock-outs” (11.1% urban versus 25% rural; p=0.02). All 15 sites reached the desirable performance of 0% “dispensing mono- or dual-therapy”. Data were unavailable to evaluate “virological suppression” due to limited access to viral load testing (min-max: <1%-15%). Potential HIVDR was higher in rural (57.9%) compared to urban (27.8%) settings, p=0.02; and at primary (57.9%) compared to secondary/tertiary (33.3%) healthcare levels, p=0.09. Conclusions Delayed pill pick-up and pharmacy stock-outs are major factors favoring HIVDR emergence, with higher risks in rural settings and at primary healthcare. Retention in care appears acceptable in general while ART dispensing practices are standard. There is need to support patient-adherence to pharmacy appointments while reinforcing the national drug supply system.
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Affiliation(s)
- Joseph Fokam
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
- University of Rome Tor Vergata, Department of Experimental Medicine and Surgery, Rome, Italy
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
- * E-mail:
| | - Jean-Bosco N. Elat
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
- National AIDS Control Committee, Ministry of Public Health, Yaoundé, Cameroon
| | - Serge C. Billong
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
- National AIDS Control Committee, Ministry of Public Health, Yaoundé, Cameroon
| | - Etienne Kembou
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
- World Health Organization (WHO), Afro, Country Office, Yaoundé, Cameroon
| | - Armand S. Nkwescheu
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
- Division of Operational Health Research, Ministry of Public Health, Yaoundé, Cameroon
| | - Nicolas M. Obam
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
- Division of Operational Health Research, Ministry of Public Health, Yaoundé, Cameroon
| | - André Essiane
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
| | - Judith N. Torimiro
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
| | | | - Alexis Ndjolo
- Chantal BIYA International Reference Centre for research on HIV/AIDS prevention and management (CIRCB), Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
| | - Koulla S. Shiro
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
- General Secretariat, Ministry of Public Health, Yaoundé, Cameroon
- Agence National de Recherche sur le SIDA et les hépatites virales (ANRS), Yaoundé, Cameroon
| | - Anne C. Z-K. Bissek
- Faculty of Medicine and Biomedical Sciences (FMBS), University of Yaoundé I, Yaoundé, Cameroon
- National HIV Drug Resistance Surveillance and Prevention Working Group, Ministry of Public Health, Yaoundé, Cameroon
- Division of Operational Health Research, Ministry of Public Health, Yaoundé, Cameroon
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Billong SC, Fokam J, Billong EJ, Nguefack-Tsague G, Essi MJ, Fodjo R, Sosso SM, Gomba A, Mosoko-Jembia J, Loni-Ekali G, Colizzi V, Bissek ACZK, Monebenimp F, Nfetam JBE. [Epidemiological distribution of HIV infection among pregnant women in the ten regions of Cameroon and strategic implications for prevention programs]. Pan Afr Med J 2015; 20:79. [PMID: 26090037 PMCID: PMC4450023 DOI: 10.11604/pamj.2015.20.79.4216] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 09/27/2014] [Indexed: 11/11/2022] Open
Abstract
Introduction Le Cameroun se situe dans un contexte d’épidémie généralisée du VIH. La sous-population des femmes enceintes, facilement accessible au sein de la population générale, représente une cible probante pour mener la surveillance du VIH et estimer l’évolution épidémiologique. L'objectif de notre étude était d’évaluer la distribution épidémiologique du VIH chez les femmes enceintes. Méthodes Étude transversale menée en 2012 chez 6521 femmes enceintes (49,3% âgées de 15-24 ans) en première consultation prénatale (CPN1) dans 60 sites des 10 régions Camerounaises. L'algorithme en série a été utilisé pour le sérodiagnostic du VIH. Résultats La prévalence du VIH était de 7,8% (508/6521), avec une différence non significative (p = 0,297) entre milieu rural (7,4%) et milieu urbain (8,1%). En zone rurale, cette prévalence variait de 0,7% à l'Extrême-Nord à 11,8% au Sud. Cependant, en zone urbaine elle variait de 4% à l'Ouest à 11,1% au Sud-Ouest. Suivant l’âge, la prévalence était plus élevée (11,3%) chez les femmes de 35-39 ans. Suivant le niveau de scolarisation, la prévalence du VIH était plus faible (4,4%) chez celles non-scolarisées, et plus élevée (9,3%) chez celles ayant un niveau primaire. Selon la profession, l'infection était plus élevée chez les coiffeuses (15,5%), secrétaires (14,8%), commerçantes (12,9%) et institutrices/enseignantes (10,8%). Conclusion La prévalence du VIH reste élevée chez les femmes enceintes au Cameroun, sans distinction entre milieux rural et urbain. Les stratégies de prévention devraient s'orienter préférentiellement chez les femmes enceintes âgées, celles du niveau d'instruction primaire, et celles du secteur des petites et moyennes entreprises.
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Affiliation(s)
- Serge-Clotaire Billong
- Groupe de Travail National pour la Surveillance et la Prévention de la Pharmacorésistance du VIH (HIVDR-WG), Ministère de la Santé Publique, Yaoundé, Cameroun ; Faculté de Médecine et des Sciences Biomédicales (FMSB), Université de Yaoundé 1, Yaoundé, Cameroun ; Groupe Technique Central (GTC), Comité National de Lutte contre le SIDA (CNLS), Ministère de la Santé Publique, Yaoundé, Cameroun
| | - Joseph Fokam
- Groupe de Travail National pour la Surveillance et la Prévention de la Pharmacorésistance du VIH (HIVDR-WG), Ministère de la Santé Publique, Yaoundé, Cameroun ; Faculté de Médecine et des Sciences Biomédicales (FMSB), Université de Yaoundé 1, Yaoundé, Cameroun ; Centre International de Référence Chantal BIYA (CIRCB) pour la Recherche sur la Prévention et la Prise en Charge du VIH/SIDA, Yaoundé, Cameroun
| | - Edson-Joan Billong
- Faculté de Médecine, Université Faculté d'Antanarivo, Antanarivo, Madagascar
| | - Georges Nguefack-Tsague
- Faculté de Médecine et des Sciences Biomédicales (FMSB), Université de Yaoundé 1, Yaoundé, Cameroun
| | - Marie-Josée Essi
- Faculté de Médecine et des Sciences Biomédicales (FMSB), Université de Yaoundé 1, Yaoundé, Cameroun
| | - Raoul Fodjo
- Groupe Technique Central (GTC), Comité National de Lutte contre le SIDA (CNLS), Ministère de la Santé Publique, Yaoundé, Cameroun
| | - Samuel-Martin Sosso
- Centre International de Référence Chantal BIYA (CIRCB) pour la Recherche sur la Prévention et la Prise en Charge du VIH/SIDA, Yaoundé, Cameroun
| | - Armelle Gomba
- Faculté de Médecine et des Sciences Biomédicales (FMSB), Université de Yaoundé 1, Yaoundé, Cameroun
| | - Joseph Mosoko-Jembia
- Centers for Disease Control and Prevention (CDC), Division of Global HIV/AIDS, Bureau-Cameroun
| | - Gabriel Loni-Ekali
- Groupe Technique Central (GTC), Comité National de Lutte contre le SIDA (CNLS), Ministère de la Santé Publique, Yaoundé, Cameroun
| | - Vittorio Colizzi
- Centre International de Référence Chantal BIYA (CIRCB) pour la Recherche sur la Prévention et la Prise en Charge du VIH/SIDA, Yaoundé, Cameroun ; Université de Rome Tor Vergata, et UNESCO Multidisciplinary Biotechnology Board, Rome, Italie
| | - Anne-Cécile Zoung-Kani Bissek
- Faculté de Médecine et des Sciences Biomédicales (FMSB), Université de Yaoundé 1, Yaoundé, Cameroun ; Division de la Recherche Opérationnelle en Santé, Ministère de la Santé Publique, Yaoundé, Cameroun
| | - Francisca Monebenimp
- Faculté de Médecine et des Sciences Biomédicales (FMSB), Université de Yaoundé 1, Yaoundé, Cameroun
| | - Jean-Bosco Elat Nfetam
- Groupe de Travail National pour la Surveillance et la Prévention de la Pharmacorésistance du VIH (HIVDR-WG), Ministère de la Santé Publique, Yaoundé, Cameroun ; Groupe Technique Central (GTC), Comité National de Lutte contre le SIDA (CNLS), Ministère de la Santé Publique, Yaoundé, Cameroun
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Rojas Sánchez P, Holguín A. Drug resistance in the HIV-1-infected paediatric population worldwide: a systematic review. J Antimicrob Chemother 2014; 69:2032-42. [PMID: 24788658 DOI: 10.1093/jac/dku104] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Drug resistance monitoring of the paediatric HIV-1-infected population is required to optimize treatment success and preserve future treatment options. OBJECTIVES To explore the current knowledge of HIV drug resistance (HIVDR) in naive and pretreated HIV-1-infected paediatric populations across diverse settings and sampling time periods. METHODS PubMed database screened until May 2013. We selected publications including data on transmitted (TDR) and acquired drug resistance mutation (DRM) rates and/or pol sequences for HIVDR testing in paediatric patients. We recorded the children's country, age, study period, number of children with pol sequences, presence or absence of antiretroviral treatment (ART) at sampling time, viral region sequenced, HIVDR rate to the three main drug classes (single, double or triple), the considered resistance mutation list and performed assay, specimen type, HIV-1 variants and subtyping methodology when available. RESULTS Forty-one selected studies showed HIVDR data from 2538 paediatric HIV-1-infected patients (558 naive and 1980 pretreated) from 30 countries in Africa (11), Asia (6), America (10) and Europe (3). Both TDR and DRM prevalence were reported in 9 studies, only TDR in 6 and only DRM in 26. HIVDR prevalence varied across countries and periods. Most studies used in-house resistance assays using plasma or infected cells. HIV-1 non-B variants were prevalent in 18 paediatric cohorts of the 24 countries with reported subtypes. Only five countries (Uganda, Spain, the UK, Brazil and Thailand) presented resistance data in ≥200 patients. CONCLUSIONS Systematic and periodic studies among infected children are crucial to design a more suitable first- or second-line therapy.
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Affiliation(s)
- Patricia Rojas Sánchez
- HIV-1 Molecular Epidemiology Laboratory, Microbiology Department, Hospital Ramón y Cajal-IRYCIS and CIBERESP, Madrid, Spain
| | - Africa Holguín
- HIV-1 Molecular Epidemiology Laboratory, Microbiology Department, Hospital Ramón y Cajal-IRYCIS and CIBERESP, Madrid, Spain
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TB and HIV in the Central African region: current knowledge and knowledge gaps. Infection 2013; 42:281-94. [PMID: 24311148 DOI: 10.1007/s15010-013-0568-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 11/27/2013] [Indexed: 12/12/2022]
Abstract
PURPOSE Reliable and comprehensive data on the HIV/AIDS and TB co-pandemics from Central Africa remain scarce. This systematic review provides a comprehensive overview on current and past research activities in the region and provides a basis for future research work to close knowledge gaps. METHODS The scientific literature was searched for publications meeting the following search terms: "tuberculosis" or "HIV" or "acquired immunodeficiency syndrome", combined with "Central Africa", or the names of individual countries within the region. Original studies, reviews and case series were included, and a selection of relevant articles was made. RESULTS Most research in the field of HIV and TB has been conducted in Cameroon, where the epidemics have been described fairly well. The Democratic Republic of Congo ranked second on the amount of publications, despite the civil wars over the past several decades. Very little has been published on HIV and TB in the other countries, possibly due to the poor infrastructure of health care systems, lack of scientific capacity building or shortage of laboratory equipment. CONCLUSIONS Despite the relatively high burden of HIV and TB in the Central African region, the amount of research activities on these topics is limited. A better understanding of the co-epidemics in this region is urgently needed. The occurrence of opportunistic infections, treatment complications and drug resistance in TB and HIV need to be better described; the failure of public health systems needs to be understood, and research infrastructure needs to be developed. Only then will it be possible to turn the tide against the HIV and TB epidemics in this region.
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Billong SC, Fokam J, Aghokeng AF, Milenge P, Kembou E, Abessouguie I, Meva’a-Onglene FB, Bissek ACZK, Colizzi V, Mpoudi EN, Elat JBN, Shiro KS. Population-based monitoring of emerging HIV-1 drug resistance on antiretroviral therapy and associated factors in a sentinel site in Cameroon: low levels of resistance but poor programmatic performance. PLoS One 2013; 8:e72680. [PMID: 23991142 PMCID: PMC3753336 DOI: 10.1371/journal.pone.0072680] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Accepted: 07/18/2013] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Scale-up of antiretroviral therapy (ART) in resource-limited settings has drastically reduced HIV-related morbidity and mortality. However, challenges in long-term ART, adherence and HIV drug resistance (HIVDR) itself, require monitoring to limit HIVDR emergence among ART-experienced populations, in order to ensure regimen efficacy. METHODS A longitudinal study was conducted from 2009-2011 in a cohort of 141 HIV-infected adult patients (aged >21) at the national social insurance centre hospital in Yaounde, Cameroon. As per-WHO HIVDR protocol, HIV-1 protease-reverse transcriptase genotyping was performed at baseline and at endpoint (12 months) on first-line ART using ViroSeq™ Genotyping kit. RESULTS At baseline, a prevalence of 3.6% (5/139) HIVDR was observed [protease inhibitors M46I (1/5), G73A (1/5), L90LM (1/5); nucleoside reverse transcriptase inhibitors: M184V (1/5), T215F (1/5); non-nucleoside reverse transcriptase inhibitors: K103N (1/5), Y181Y/C (2/5), M230ML (1/5)]. At endpoint, 54.0% (76) patients were followed-up, 9.2% (13) died, and 3.5% (5) transferred, 38.5% (47) lost to follow-up (LTFU). 69.7% (53/76) of those followed-up had viremia <40 copies/ml and 90.8% (69/76) <1000 copies/ml. 4/7 patients with viremia ≥1000 copies/ml harbored HIVDR (prevalence: 5.3%; 4/76), with M184V/I (4/4) and K103K/N (3/4) being the most prevalent mutations. LTFU was favored by costs for consultation/laboratory tests, drug shortages, workload (physician/patient ratio: 1/180) and community disengagement. CONCLUSIONS Low levels of HIVDR at baseline and at endpoint suggest a probable effectiveness of ART regimens used in Cameroon. However the possible high rate of HIVDR among LTFUs limited the strengths of our findings. Evaluating HIVDR among LTFU, improving adherence, task shifting, subsidizing/harmonizing costs for routine follow-up, are urgent measures to ensure an improved success of the country ART performance.
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Affiliation(s)
- Serge C. Billong
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- National AIDS Control Committee, Central Technical Group, Yaounde, Cameroon
- Faculty of Medicine and Biomedical Sciences of the University of Yaounde 1, Yaounde, Cameroon
- * E-mail: (JF); (SCB)
| | - Joseph Fokam
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- Faculty of Medicine and Biomedical Sciences of the University of Yaounde 1, Yaounde, Cameroon
- CIRCB: Chantal BIYA International Reference Centre for Research on HIV/AIDS prevention and management, Molecular Biology Laboratory, Sequencing unit, Yaounde, Cameroon
- * E-mail: (JF); (SCB)
| | - Avelin F. Aghokeng
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- Centre de Recherche en Maladies Emergentes et Ré-émergentes (CREMER)/IMPM/IRD, Virology Laboratory, Yaounde, Cameroon
- Institut de Recherche pour le Développement (IRD), University Montpellier 1, UMI 233 TransVIHMI, Montpellier, France
| | - Pascal Milenge
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- World Health Organisation (WHO), Afro, HIV/AIDS, Yaounde, Cameroon
| | - Etienne Kembou
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- World Health Organisation (WHO), Afro, HIV/AIDS, Yaounde, Cameroon
| | - Ibile Abessouguie
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- National AIDS Control Committee, Central Technical Group, Yaounde, Cameroon
| | | | - Anne C. Zoung-Kanyi. Bissek
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- Department of Disease Control, Ministry of Public Health, Yaounde, Cameroon
| | - Vittorio Colizzi
- CIRCB: Chantal BIYA International Reference Centre for Research on HIV/AIDS prevention and management, Molecular Biology Laboratory, Sequencing unit, Yaounde, Cameroon
- University of Rome Tor Vergata, Laboratory of Immunology and Molecular Pathology, Department of Biology, Faculty of Sciences, Rome, Italy
| | - Eitel N. Mpoudi
- Centre de Recherche en Maladies Emergentes et Ré-émergentes (CREMER)/IMPM/IRD, Virology Laboratory, Yaounde, Cameroon
| | - Jean-Bosco N. Elat
- National HIV Drug Resistance Prevention and Surveillance Working Group, Yaounde, Cameroon
- National AIDS Control Committee, Central Technical Group, Yaounde, Cameroon
| | - Koulla S. Shiro
- Faculty of Medicine and Biomedical Sciences of the University of Yaounde 1, Yaounde, Cameroon
- Yaounde Central Hospital, Infectiology service, Yaounde, Cameroon
- Division of Operational Health Research, Ministry of Public Health, Yaounde, Cameroon
- General Secretariat, Ministry of Public Health, Yaounde, Cameroon
- Agence Nationale pour la Recherche sur le Sida et les hépatites virales (ANRS)-Sud, Yaounde, Cameroon
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Fokam J, Billong SC, Bissek ACZK, Kembou E, Milenge P, Abessouguie I, Nkwescheu AS, Tsomo Z, Aghokeng AF, Ngute GD, Ndumbe PM, Colizzi V, Elat JBN. Declining trends in early warning indicators for HIV drug resistance in Cameroon from 2008-2010: lessons and challenges for low-resource settings. BMC Public Health 2013; 13:308. [PMID: 23565992 PMCID: PMC3627634 DOI: 10.1186/1471-2458-13-308] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Accepted: 04/03/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Rapid scale-up of antiretroviral therapy (ART) and limited access to genotyping assays in low-resource settings (LRS) are inevitably accompanied by an increasing risk of HIV drug resistance (HIVDR). The current study aims to evaluate early warning indicators (EWI) as an efficient strategy to limit the development and spread of preventable HIVDR in these settings, in order to sustain the performance of national antiretroviral therapy (ART) rollout programmes. METHODS Surveys were conducted in 2008, 2009 and 2010 within 10 Cameroonian ART clinics, based on five HIVDR EWIs: (1) Good prescribing practices; (2) Patient lost to follow-up; (3) Patient retention on first line ART; (4) On-time drug pick-up; (5) Continuous drug supply. Analysis was performed as per the World Health Organisation (WHO) protocol. RESULTS An overall decreasing performance of the national ART programme was observed from 2008 to 2010: EWI(1) (100% to 70%); EWI(2) (40% to 20%); EWI(3) (70% to 0%); EWI(4) (0% throughout); EWI(5) (90% to 40%). Thus, prescribing practices (EWI(1)) were in conformity with national guidelines, while patient adherence (EWI(2), EWI(3), and EWI(4)) and drug supply (EWI(5)) were lower overtime; with a heavy workload (median ratio ≈1/64 staff/patients) and community disengagement observed all over the study sites. CONCLUSIONS In order to limit risks of HIVDR emergence in poor settings like Cameroon, continuous drug supply, community empowerment to support adherence, and probably a reduction in workload by task shifting, are the potential urgent measures to be undertaken. Such evidence-based interventions, rapidly generated and less costly, would be relevant in limiting the spread of preventable HIVDR and in sustaining the performance of ART programmes in LRS.
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Affiliation(s)
- Joseph Fokam
- Chantal BIYA International Reference Centre (CIRCB) for research on HIV/AIDS prevention and management, Yaounde, Cameroon.
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Zoufaly A, Fillekes Q, Hammerl R, Nassimi N, Jochum J, Drexler JF, Awasom CN, Sunjoh F, Burchard GD, Burger DM, van Lunzen J, Feldt T. Prevalence and determinants of virological failure in HIV-infected children on antiretroviral therapy in rural Cameroon: a cross-sectional study. Antivir Ther 2013; 18:681-90. [PMID: 23502762 DOI: 10.3851/imp2562] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2013] [Indexed: 10/27/2022]
Abstract
BACKGROUND In Africa, success of antiretroviral treatment (ART) seems to lag behind in children compared with adults, and high therapeutic failure rates have been reported. We aimed to identify prevalence and determinants of virological failure in HIV-infected children treated under programmatic conditions. METHODS All patients <18 years on ART presenting to the HIV clinic at the Bamenda Regional Hospital, a secondary referral hospital in rural Cameroon, from September 2010 to August 2011, were enrolled in this cross-sectional study. Clinical data, self-reported adherence, CD4(+) T-cell counts and viral load were recorded. Therapeutic drug monitoring was performed on stored plasma samples. Determinants of virological failure were identified using descriptive statistics and logistic regression. RESULTS A total of 230 children with a mean age of 8.9 years (sd 3.7) were included. At the time of analysis, the mean duration of HAART was 3.5 years (sd 1.7) and 12% had a CD4(+) T-cell count <200 cells/µl. In total, 53% of children experienced virological failure (>200 copies/ml). Among children on nevirapine (NVP), plasma levels were subtherapeutic in 14.2% and supratherapeutic in 42.2%. Determinants of virological failure included male sex, lower CD4(+) T-cell counts, subtherapeutic drug levels, longer time on ART and a deceased mother. Poor adherence was associated with subtherapeutic NVP plasma levels and advanced disease stages (WHO stage 3/4). CONCLUSIONS This study demonstrates high virological failure rates and a high variability of NVP plasma levels among HIV-infected children in a routine ART programme in rural Cameroon. Strategies to improve adherence to ART in HIV-infected children are urgently needed.
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Affiliation(s)
- Alexander Zoufaly
- Department of Medicine I, Infectious Diseases Unit, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Preserving future therapeutic options: should we limit the lamivudine use in young HIV-1 infected children initiating first-line HAART? AIDS 2013; 27:151-4. [PMID: 23032408 DOI: 10.1097/qad.0b013e32835a99f1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Emerging HIV-1 drug resistance after roll-out of antiretroviral therapy in sub-Saharan Africa. Curr Opin HIV AIDS 2013; 8:19-26. [DOI: 10.1097/coh.0b013e32835b7f94] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Billong SC, Fokam J, Nkwescheu AS, Kembou E, Milenge P, Tsomo Z, Dion GN, Aghokeng AF, Mpoudi EN, Ndumbe PM, Colizzi V, Elat Nfetam JB. Early warning indicators for HIV drug resistance in Cameroon during the year 2010. PLoS One 2012; 7:e36777. [PMID: 22615810 PMCID: PMC3355154 DOI: 10.1371/journal.pone.0036777] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Accepted: 04/05/2012] [Indexed: 11/26/2022] Open
Abstract
Background Rapid scale-up of antiretroviral therapy (ART) in resource-limited settings is accompanied with an increasing risk of HIV drug resistance (HIVDR), which in turn could compromise the performance of national ART rollout programme. In order to sustain the effectiveness of ART in a resource-limited country like Cameroon, HIVDR early warning indicators (EWI) may provide relevant corrective measures to support the control and therapeutic management of AIDS. Methods A retrospective study was conducted in 2010 among 40 ART sites (12 Approved Treatment Centers and 28 Management Units) distributed over the 10 regions of Cameroon. Five standardized EWIs were selected for the evaluation using data from January through December, among which: (1) Good ARV prescribing practices: target = 100%; (2) Patient lost to follow-up: target ≤20%; (3) Patient retention on first line ART: target ≥70%; (4) On-time drug pick-up: target ≥90%; (5) ARV drug supply continuity: target = 100%. Analysis was performed using a Data Quality Assessment tool, following WHO protocol. Results The number of sites attaining the required performance are: 90% (36/40) for EWI1, 20% (8/40) for EWI2; 20% (8/40) for EWI3; 0% (0/37) for EWI4; and 45% (17/38) for EWI 5. ARV prescribing practices were in conformity with the national guidelines in almost all the sites, whereas patient adherence to ART (EWI2, EWI3, and EWI4) was very low. A high rate of patients was lost-to-follow-up and others failing first line ART before 12 months of initiation. Discontinuity in drug supply observed in about half of the sites may negatively impact ARV prescription and patient adherence. These poor ART performances may also be due to low number of trained staff and community disengagement. Conclusions The poor performance of the national ART programme, due to patient non-adherence and drug stock outs, requires corrective measures to limit risks of HIVDR emergence in Cameroon.
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Affiliation(s)
- Serge C Billong
- National HIV Drug Resistance Surveillance and Prevention Working Group, HIVDR-WG, National AIDS Control Committee, Yaounde, Cameroon.
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