CD41 T cell recovery during suppression of HIV replication: an international comparison of the immunological efficacy of antiretroviral therapy in North America, Asia and Africa.

Elvin H Geng 1 Torsten B Neilands 1 Rodolphe Thièbaut 2, 3 Mwebesa Bosco Bwana 4 Denis Nash 5 Richard D Moore 6 Robin Wood 7 Djimon Marcel Zannou 8, 9 Keri N Althoff 6 Poh Lian Lim 10, 8 Jean B Nachega 11 Philippa J Easterbrook 12 Andrew Kambugu 12 Francesca Little 7 Gertrude Nakigozi 6 Damalie Nakanjako 12 Valerian Kiggundu 6 Patrick Chung Ki Li 13 David R Bangsberg 14 Matthew P Fox 15 Hansw Prozesky 16 Peter W Hunt 1 Mary-Ann Davies 7 Steven J Reynolds 6 Matthias Egger 17 Constantin T Yiannoutsos 18 Eric V Vittinghoff 1 Steven G Deeks 1 Jeffrey N Martin 19
Abstract : Even among HIV-infected patients who fully suppress plasma HIV RNA replication on antiretroviral therapy, genetic (e.g. CCL3L1 copy number), viral (e.g. tropism) and environmental (e.g. chronic exposure to microbial antigens) factors influence CD4 recovery. These factors differ markedly around the world and therefore the expected CD4 recovery during HIV RNA suppression may differ globally. We evaluated HIV-infected adults from North America, West Africa, East Africa, Southern Africa and Asia starting non-nucleoside reverse transcriptase inhibitorbased regimens containing efavirenz or nevirapine, who achieved at least one HIV RNA level <500/ml in the first year of therapy and observed CD4 changes during HIV RNA suppression. We used a piecewise linear regression to estimate the influence of region of residence on CD4 recovery, adjusting for socio-demographic and clinical characteristics. We observed 28 217 patients from 105 cohorts over 37 825 person-years. After adjustment, patients from East Africa showed diminished CD4 recovery as compared with other regions. Three years after antiretroviral therapy initiation, the mean CD4 count for a prototypical patient with a pre-therapy CD4 count of 150/ml was 529/ml [95% confidence interval (CI): 517–541] in North America, 494/ml (95% CI: 429–559) in West Africa, 515/ml (95% CI: 508–522) in Southern Africa, 503/ml (95% CI: 478–528) in Asia and 437/ml (95% CI: 425–449) in East Africa. CD4 recovery during HIV RNA suppression is diminished in East Africa as compared with other regions of the world, and observed differences are large enough to potentially influence clinical outcomes. Epidemiological analyses on a global scale can identify macroscopic effects unobservable at the clinical, national or individual regional level.
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International Journal of Epidemiology, Oxford University Press (OUP), 2015, 44 (1), pp.251-63
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Elvin H Geng, Torsten B Neilands, Rodolphe Thièbaut, Mwebesa Bosco Bwana, Denis Nash, et al.. CD41 T cell recovery during suppression of HIV replication: an international comparison of the immunological efficacy of antiretroviral therapy in North America, Asia and Africa.. International Journal of Epidemiology, Oxford University Press (OUP), 2015, 44 (1), pp.251-63. 〈hal-01288872〉

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