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Mathur P, Kottilil S, Pallikkuth S, Frasca D, Ghosh A. Persistent CD38 Expression on CD8 + T Lymphocytes Contributes to Altered Mitochondrial Function and Chronic Inflammation in People With HIV, Despite ART. J Acquir Immune Defic Syndr 2022; 91:410-418. [PMID: 36000933 PMCID: PMC9613598 DOI: 10.1097/qai.0000000000003080] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/16/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Age-associated comorbidities are higher in people with HIV (PWH) than HIV-negative individuals. This is partially attributed to immune activation and CD38 expression on T cells driving chronic inflammation. However, the exact contribution of CD38-expressing T cells on the proinflammatory response is not completely understood. METHODS CD38-expressing CD8 + T lymphocytes were measured from PWH and HIV-negative individuals. Mitochondrial mass, superoxide content, membrane depolarization of CD4 + and CD8 + T lymphocytes, and cytokine production after HIV(Gag)-specific peptide stimulation from CD38 + CD8 + T lymphocytes of PWH were measured to link biological effects of CD38 expression on cellular metabolism. RESULTS The frequency of activated CD8 + CD38 + T cells persists in PWH on ART compared with HIV-negative individuals. Higher CD38 expression is associated with mitochondrial biogenesis and HIV(Gag)-specific proinflammatory cytokine production in PWH. Blockade of CD38 results in lower Gag-specific cytokine production. CONCLUSIONS ART only partially reduced HIV-induced CD38 expression on CD8 + T cells. CD8 + CD38 + T cells are highly activated in vivo, and HIV-specific stimulation in vitro augments CD38 expression, contributing to a proinflammatory response despite virologic control with ART. Therefore, CD38 is a potential therapeutic target for mitigating chronic inflammation that likely drives cellular aging, comorbidities, and end-organ disease in PWH.
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Affiliation(s)
- Poonam Mathur
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Shyamasundaran Kottilil
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Suresh Pallikkuth
- Department of Microbiology and Immunology and Miami Center for AIDS Research, University of Miami Miller School of Medicine
| | - Daniela Frasca
- Department of Microbiology and Immunology and Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine
| | - Alip Ghosh
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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Lu L, Wang J, Yang Q, Xie X, Huang Y. The role of CD38 in HIV infection. AIDS Res Ther 2021; 18:11. [PMID: 33820568 PMCID: PMC8021004 DOI: 10.1186/s12981-021-00330-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 03/06/2021] [Indexed: 11/24/2022] Open
Abstract
The widely-expressed molecule CD38 is a single-stranded type II transmembrane glycoprotein that is mainly involved in regulating the differentiation and activation state of the cell. CD38 has broad and complex functions, including enzymatic activity, intercellular signal transduction, cell activation, cytokine production, receptor function and adhesion activity, and it plays an important role in the physiological and pathological processes of many diseases. Many studies have shown that CD38 is related to the occurrence and development of HIV infection, and CD38 may regulate its progression through different mechanisms. Therefore, investigating the role of CD38 in HIV infection and the potential signaling pathways that are involved may provide a new perspective on potential treatments for HIV infection. In the present review, the current understanding of the roles CD38 plays in HIV infection are summarized. In addition, the specific role of CD38 in the process of HIV infection of human CD4+ T lymphocytes is also discussed.
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Shete A, Dhayarkar S, Sangale S, Medhe U, Panchal N, Rahane G, Yelgate R, Dhamanage A, Gangakhedkar R. Incomplete functional T-cell reconstitution in immunological non-responders at one year after initiation of antiretroviral therapy possibly predisposes them to infectious diseases. Int J Infect Dis 2019; 81:114-122. [PMID: 30658168 DOI: 10.1016/j.ijid.2019.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 01/01/2019] [Accepted: 01/08/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Immunological non-responders (INR) represent a unique category of HIV-infected patients on antiretroviral therapy. These patients have suppressed viremia but a suboptimal increase in CD4 cell count, which might have opposing effects on functional immune reconstitution. Hence, the extent of immune reconstitution in INR patients was investigated in order to determine their susceptibility to opportunistic infections. METHODS Twenty-three INR patients (CD4 increase <50 cells/mm3, viral load <40 copies/ml), 40 age-, sex-, and baseline CD4 count-matched responders (CD4 increase >100 cells/mm3, viral load <40 copies/ml), and 18 treatment failures defined as per the national guidelines were enrolled at 1year of antiretroviral therapy. The following examinations were performed: haemogram, phenotypic characterization by flow cytometry, and assessment of functional immune status by ELISPOT and intracellular cytokine assays. RESULTS A higher percentage of INR patients had clinically symptomatic infections than the responders. CD8+ activation and innate immune parameters, including the absolute neutrophil count and natural killer (NK) cell frequency and functionality, were restored in the INR patients. They had significantly higher non-HIV antigen-specific T-cell responses and activated CD4+ cells, but significantly compromised T-cell functionality, as assessed after anti-CD3 stimulation, and lower CD31+ and CD62L+CD4+ cells. CONCLUSIONS INR patients showed lower thymic output, incomplete functional T-cell reconstitution, higher responses to HIV co-pathogens, and higher symptomatic events, indicating the need for close monitoring and intervention strategies to overcome their continuing immunocompromised status.
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Affiliation(s)
- Ashwini Shete
- ICMR-National AIDS Research Institute, Bhosari, Pune, India
| | | | | | - Uttam Medhe
- Yashwantrao Chavan Memorial Hospital, Sant Tukaram Nagar, Pimpri, Pune, India
| | | | - Girish Rahane
- ICMR-National AIDS Research Institute, Bhosari, Pune, India
| | | | | | - Raman Gangakhedkar
- ICMR-National AIDS Research Institute, Bhosari, Pune, India; Indian Council of Medical Research, V. Ramalingaswami Bhawan, Ansari Nagar, New Delhi, India.
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Abstract
OBJECTIVE To assess if the reduction in HIV-1 RNA in CD4 T cells is correlated with the persistence of immune activation following early antiretroviral therapy (ART). DESIGN Clinical trial (NCT01285050). METHODS Next-generation sequencing was used to study total RNA from activated CD4 T cells (CD38 and human leukocyte antigen - antigen D related (HLA-DR) expressing) collected from 19 treatment-naïve HIV-1/hepatitis C virus-infected patients before and early after ART initiation (≥12 weeks after plasma HIV-1 RNA <50 copies/ml). To validate comparisons, pre and post-ART measures were adjusted for input RNA and overall read number. RESULTS As expected, ART use was associated with a median [interquartile range (IQR)] 4.3% (2.2-8.3) reduction in the proportion of activated CD4 T cells (P = 0.0008). Whereas in those activated CD4 T cells no consistent differences in overall gene expression were detected, interferon-stimulated gene expression declined (P < 2 × 10). Pre-ART, sorted activated CD4 T cells contained a median (IQR) of 959 (252-1614) HIV-1 reads/10 reads compared with 72 (55-152) HIV-1 reads/10 reads after at least 12 weeks of suppressive ART (P = 8 × 10). The decrease in HIV-1 reads in activated CD4 T cells was associated with the change in plasma HIV-1 RNA levels (r = 0.77, P = 2 × 10) and the change in the proportion of activated CD4 T cells (r = 0.70, P = 0.0016). CONCLUSION Months of ART led to a marked decrease in cell-associated HIV-1 RNA and interferon-stimulated genes expression in activated CD4 T cells that were strongly associated with the reduction in the proportion of activated CD4 T cells.
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de Carvalho PG, de Oliveira Rodrigues R, Ribeiro da Silva SF, Ribeiro IF, de Miranda Lucena HB, Martins LRC, Rabenhorst SH, de Arruda ÉAG, Nagao-Dias AT. CD38+CD8+ and CD38+CD4+ T Cells and IFN Gamma (+874) Polymorphism Are Associated with a Poor Virological Outcome. Immunol Invest 2016; 45:312-27. [PMID: 27100997 DOI: 10.3109/08820139.2016.1157603] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The main objective of the work was to evaluate the use of CD38 on T lymphocytes, IFNγ (+874 A/T), and IL-10 (-1082 A/G) polymorphisms in HIV-infected patients under antiretroviral (ARV) therapy. Sixty-one patients were selected at the outpatient clinic for HIV infection at the Hospital São José de Doenças Infecciosas, Fortaleza, Ceará, Brazil. The patients were classified into two groups, according to viral load after one year of ARV therapy. In the aviremic group (group I), a reduction of 35.5% of CD38+CD4+ T cells was observed (p = 0.02) and 49.3% of CD38+CD8+ T cells (p = 0.001). In the viremic group (group II), a reduction of 37.2% of CD38+CD4+ T cells (p = 0.067), and 21.4% of CD38+CD8+ T cells (p = 0.60) occurred. No association was found between IL-10 (-1082) polymorphism and the type of response to ARV therapy. Regarding the gene polymorphism on IFNγ (+874 T/A), 73.34% of group I and 33.3% of group II presented the AA genotype. The relative risk of the individuals carrying AA genotype or the A allele and not being able to suppress the viral load level after one year of ARV therapy was 3.44 (1.25-9.45; p = 0.014) or 2.35 (1.05-5.26; p = 0.027), respectively. Our data suggested that an augmented frequency of activated CD38+CD8+ T cells as well as the presence of the A allele of IFNγ polymorphism could contribute to a reduced virological suppression in patients under antiretroviral therapy.
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Affiliation(s)
- Paulo Germano de Carvalho
- a Centro de Ciências da Saúde , Universidade de Fortaleza , Ceará , Brazil.,b Departamento de Análises Clínicas e Toxicológicas , Faculdade de Farmácia, Universidade Federal do Ceará , Fortaleza , Ceará , Brazil
| | - Raphael de Oliveira Rodrigues
- b Departamento de Análises Clínicas e Toxicológicas , Faculdade de Farmácia, Universidade Federal do Ceará , Fortaleza , Ceará , Brazil
| | - Silvia Fernandes Ribeiro da Silva
- a Centro de Ciências da Saúde , Universidade de Fortaleza , Ceará , Brazil.,c Laboratório de Histocompatibilidade e Imunologia de Transplantes do Centro de Pesquisas em Doenças Hepato Renais, Hemocentro , Fortaleza , Ceará , Brazil
| | - Ilana Farias Ribeiro
- c Laboratório de Histocompatibilidade e Imunologia de Transplantes do Centro de Pesquisas em Doenças Hepato Renais, Hemocentro , Fortaleza , Ceará , Brazil
| | | | | | - Silvia Helena Rabenhorst
- e Departamento de Patologia e de Medicina Legal , Universidade Federal do Ceará , Fortaleza , Ceará , Brazil
| | | | - Aparecida Tiemi Nagao-Dias
- b Departamento de Análises Clínicas e Toxicológicas , Faculdade de Farmácia, Universidade Federal do Ceará , Fortaleza , Ceará , Brazil
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Eller MA, Opollo MS, Liu M, Redd AD, Eller LA, Kityo C, Kayiwa J, Laeyendecker O, Wawer MJ, Milazzo M, Kiwanuka N, Gray RH, Serwadda D, Sewankambo NK, Quinn TC, Michael NL, Wabwire-Mangen F, Sandberg JK, Robb ML. HIV Type 1 Disease Progression to AIDS and Death in a Rural Ugandan Cohort Is Primarily Dependent on Viral Load Despite Variable Subtype and T-Cell Immune Activation Levels. J Infect Dis 2014; 211:1574-84. [PMID: 25404522 DOI: 10.1093/infdis/jiu646] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 11/05/2014] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Untreated human immunodeficiency virus type 1 (HIV) infection is associated with persistent immune activation, which is an independent driver of disease progression in European and United States cohorts. In Uganda, HIV-1 subtypes A and D and recombinant AD viruses predominate and exhibit differential rates of disease progression. METHODS HIV-1 seroconverters (n = 156) from rural Uganda were evaluated to assess the effects of T-cell activation, viral load, and viral subtype on disease progression during clinical follow-up. RESULTS The frequency of activated T cells was increased in HIV-1-infected Ugandans, compared with community matched uninfected individuals, but did not differ significantly between viral subtypes. Higher HIV-1 load, subtype D, older age, and high T-cell activation levels were associated with faster disease progression to AIDS or death. In a multivariate Cox regression analysis, HIV-1 load was the strongest predictor of progression, with subtype also contributing. T-cell activation did not emerge an independent predictor of disease progression from this particular cohort. CONCLUSIONS These findings suggest that the independent contribution of T-cell activation on morbidity and mortality observed in European and North American cohorts may not be directly translated to the HIV epidemic in East Africa. In this setting, HIV-1 load appears to be the primary determinant of disease progression.
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Affiliation(s)
- Michael A Eller
- US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring Henry M. Jackson Foundation for the Advancement of Military Medicine
| | | | - Michelle Liu
- US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring Henry M. Jackson Foundation for the Advancement of Military Medicine
| | - Andrew D Redd
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda
| | - Leigh Anne Eller
- US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring Henry M. Jackson Foundation for the Advancement of Military Medicine
| | | | | | - Oliver Laeyendecker
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda School of Medicine
| | - Maria J Wawer
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Mark Milazzo
- US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring Henry M. Jackson Foundation for the Advancement of Military Medicine
| | - Noah Kiwanuka
- School of Public Health Rakai Health Sciences Program, Uganda Virus Research Institute, Entebbe
| | - Ronald H Gray
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - David Serwadda
- School of Public Health Rakai Health Sciences Program, Uganda Virus Research Institute, Entebbe
| | - Nelson K Sewankambo
- Faculty of Medicine, Makerere University College of Health Sciences, Kampala Rakai Health Sciences Program, Uganda Virus Research Institute, Entebbe
| | - Thomas C Quinn
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda School of Medicine
| | - Nelson L Michael
- US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring
| | | | - Johan K Sandberg
- Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Merlin L Robb
- US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring Henry M. Jackson Foundation for the Advancement of Military Medicine
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Songok EM, Luo M, Liang B, Mclaren P, Kaefer N, Apidi W, Boucher G, Kimani J, Wachihi C, Sekaly R, Fowke K, Ball BT, Plummer FA. Microarray analysis of HIV resistant female sex workers reveal a gene expression signature pattern reminiscent of a lowered immune activation state. PLoS One 2012; 7:e30048. [PMID: 22291902 PMCID: PMC3266890 DOI: 10.1371/journal.pone.0030048] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 12/08/2011] [Indexed: 11/18/2022] Open
Abstract
To identify novel biomarkers for HIV-1 resistance, including pathways that may be critical in anti-HIV-1 vaccine design, we carried out a gene expression analysis on blood samples obtained from HIV-1 highly exposed seronegatives (HESN) from a commercial sex worker cohort in Nairobi and compared their profiles to HIV-1 negative controls. Whole blood samples were collected from 43 HIV-1 resistant sex workers and a similar number of controls. Total RNA was extracted and hybridized to the Affymetrix HUG 133 Plus 2.0 micro arrays (Affymetrix, Santa Clara CA). Output data was analysed through ArrayAssist software (Agilent, San Jose CA). More than 2,274 probe sets were differentially expressed in the HESN as compared to the control group (fold change ≥1.3; p value ≤0.0001, FDR <0.05). Unsupervised hierarchical clustering of the differentially expressed genes readily distinguished HESNs from controls. Pathway analysis through the KEGG signaling database revealed a majority of the impacted pathways (13 of 15, 87%) had genes that were significantly down regulated. The most down expressed pathways were glycolysis/gluconeogenesis, pentose phosphate, phosphatidyl inositol, natural killer cell cytotoxicity and T-cell receptor signaling. Ribosomal protein synthesis and tight junction genes were up regulated. We infer that the hallmark of HIV-1 resistance is down regulation of genes in key signaling pathways that HIV-1 depends on for infection.
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Mosoko JJ, Akam W, Weidle PJ, Brooks JT, Aweh AJ, Kinge TN, Pals S, Raghunathan PL. Retention in an antiretroviral therapy programme during an era of decreasing drug cost in Limbe, Cameroon. J Int AIDS Soc 2011; 14:32. [PMID: 21679416 PMCID: PMC3143073 DOI: 10.1186/1758-2652-14-32] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Accepted: 06/16/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In 2002, Cameroon initiated scale up of antiretroviral therapy (ART); on 1 October 2004, a substantial reduction in ART cost occurred. We assessed the impact of this event and other factors on enrolment and retention in care among HIV-infected patients initiating ART from February 2002 to December 2005 at the single ART clinic serving the Southwest Region in Limbe, Cameroon. METHODS We retrospectively analyzed clinical and pharmacy payment records of HIV-infected patients initiating ART according to national guidelines. We compared two cohorts of patients, enrolled before and after 1 October 2004, to determine if price reduction was associated with enhanced enrolment. We assessed factors associated with retention and survival by Cox proportional hazards models. Retention in care implied patients who had contact with the healthcare system as of 31 December 2005 (including those who were transferred to continue care in other ART centres), although these patients may have interrupted therapy at some time. A patient who was not retained in care may have dropped out (lost to follow up) or died. RESULTS Mean enrolment rates for 2920 patients who initiated ART before and after the price reduction were 46.5 and 95.5 persons/month, respectively (p < 0.001). The probabilities of remaining alive and in care were 0.66 (95% CI 0.64-0.68) at six months, 0.58 (95% CI 0.56-0.60) at one year, 0.47 (95% CI 0.45-0.49) at two years and 0.35 (95% CI 0.32-0.38) at three years; they were not significantly different between the two cohorts of patients enrolled before and after the price reduction over the first 15 months of comparable follow up (hazard ratio 1.1; 95% CI 0.9-1.2, p = 0.27). In multivariable analysis using multiple imputations to compensate for missing values, factors associated with dropping out of care or dying were male gender (HR 1.33 [1.18-1.50], p = 0.003), treatment paid by self, family or partly by other (HR 3.05 [1.99-4.67], p < 0.001), and, compared with residents of Limbe, living more than 150 km from Limbe (HR 1.41 [1.18-1.69], p < 0.001), or being residents of Douala (HR 1.51 [1.16-1.98], p < 0.001). CONCLUSIONS Reducing the cost of ART increased enrolment of clients in the programme, but did not change retention in care. In a system where most clients pay for ART, an accessible clinic location may be more important than the cost of medication for retention in care. Decentralizing ART clinics might improve retention and survival among patients on ART.
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Affiliation(s)
- Jembia J Mosoko
- Division of Global HIV/AIDS, Centers for Disease Control and Prevention, Mutengene, Cameroon.
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Azzoni L, Crowther NJ, Firnhaber C, Foulkes AS, Yin X, Glencross D, Gross R, Kaplan MD, Papasavvas E, Schulze D, Stevens W, van der Merwe T, Waisberg R, Sanne I, Montaner LJ. Association between HIV replication and serum leptin levels: an observational study of a cohort of HIV-1-infected South African women. J Int AIDS Soc 2010; 13:33. [PMID: 20822522 PMCID: PMC2941743 DOI: 10.1186/1758-2652-13-33] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Accepted: 09/07/2010] [Indexed: 11/14/2022] Open
Abstract
Background Advanced HIV infection can result in lipoatrophy and wasting, even in the absence of ongoing opportunistic infections, suggesting that HIV may directly affect adipose tissue amount and distribution. Methods We assessed the relationship of fat (measured using anthropometry, DEXA, MRI scans) or markers related to glucose and lipid metabolism with viral load in a cross-sectional sample of 83 antiretroviral-naïve HIV-1-infected South African women. A multivariable linear model was fitted to log10VL to assess the combined effect of these variables. Results In addition to higher T cell activation, women with viral load greater than the population median had lower waist circumference, body mass index and subcutaneous abdominal fat, as well as lower serum leptin. We demonstrate that leptin serum levels are inversely associated with viral replication, independent of the amount of adipose tissue. This association is maintained after adjusting for multiple variables associated with disease progression (i.e., cellular activation and innate immunity effector levels). Conclusions Our results demonstrate that serum leptin levels are inversely associated with viral replication, independent of disease progression: we postulate that leptin may affect viral replication.
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Walker AS, Ford D, Gilks CF, Munderi P, Ssali F, Reid A, Katabira E, Grosskurth H, Mugyenyi P, Hakim J, Darbyshire JH, Gibb DM, Babiker AG. Daily co-trimoxazole prophylaxis in severely immunosuppressed HIV-infected adults in Africa started on combination antiretroviral therapy: an observational analysis of the DART cohort. Lancet 2010; 375:1278-86. [PMID: 20347483 PMCID: PMC2858802 DOI: 10.1016/s0140-6736(10)60057-8] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND Co-trimoxazole prophylaxis can reduce mortality from untreated HIV infection in Africa; whether benefits occur alongside combination antiretroviral therapy (ART) is unclear. We estimated the effect of prophylaxis after ART initiation in adults. METHODS Participants in our observational analysis were from the DART randomised trial of management strategies in HIV-infected, symptomatic, previously untreated African adults starting triple-drug ART with CD4 counts lower than 200 cells per muL. Co-trimoxazole prophylaxis was not routinely used or randomly allocated, but was variably prescribed by clinicians. We estimated effects on clinical outcomes, CD4 cell count, and body-mass index (BMI) using marginal structural models to adjust for time-dependent confounding by indication. DART was registered, number ISRCTN13968779. FINDINGS 3179 participants contributed 14 214 years of follow-up (8128 [57%] person-years on co-trimoxazole). Time-dependent predictors of co-trimoxazole use were current CD4 cell count, haemoglobin concentration, BMI, and previous WHO stage 3 or 4 events on ART. Present prophylaxis significantly reduced mortality (odds ratio 0.65, 95% CI 0.50-0.85; p=0.001). Mortality risk reduction on ART was substantial to 12 weeks (0.41, 0.27-0.65), sustained from 12-72 weeks (0.56, 0.37-0.86), but not evident subsequently (0.96, 0.63-1.45; heterogeneity p=0.02). Variation in mortality reduction was not accounted for by time on co-trimoxazole or current CD4 cell count. Prophylaxis reduced frequency of malaria (0.74, 0.63-0.88; p=0.0005), an effect that was maintained with time, but we observed no effect on new WHO stage 4 events (0.86, 0.69-1.07; p=0.17), CD4 cell count (difference vs non-users, -3 cells per muL [-12 to 6]; p=0.50), or BMI (difference vs non-users, -0.04 kg/m(2) [-0.20 to 0.13); p=0.68]. INTERPRETATION Our results reinforce WHO guidelines and provide strong motivation for provision of co-trimoxazole prophylaxis for at least 72 weeks for all adults starting combination ART in Africa. FUNDING UK Medical Research Council, the UK Department for International Development, the Rockefeller Foundation, GlaxoSmithKline, Gilead Sciences, Boehringer-Ingelheim, and Abbott Laboratories.
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Önen NF, Overton ET, Presti R, Blair C, Powderly WG, Mondy K. Sub-optimal CD4 recovery on long-term suppressive highly active antiretroviral therapy is associated with favourable outcome. HIV Med 2009; 10:439-46. [DOI: 10.1111/j.1468-1293.2009.00711.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Early changes in T-cell activation predict antiretroviral success in salvage therapy of HIV infection. J Acquir Immune Defic Syndr 2008; 48:149-55. [PMID: 18360289 DOI: 10.1097/qai.0b013e31816d9c3b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Because effective antiretroviral therapy (ART) reduces immune activation, we hypothesize that early changes in immune activation are associated with subsequent virologic response to therapy. DESIGN Observational cohort study. SETTING Institutional HIV clinic. SUBJECTS Thirty-four adult HIV patients with virologic failure on their current antiretroviral regimen. INTERVENTION Change to salvage regimen selected by patient's physician. MAIN OUTCOME MEASURES Measures of immune activation at baseline and at 2, 4, 8, and 24 weeks after enrollment. Data were analyzed by proportional hazards (PH) models. RESULTS PH models showed that reductions between baseline and week 2 in expression of CD38 (P = 0.02) or CD95 (P = 0.02) on CD4 T cells were associated with increased likelihood of achieving virologic suppression. Kaplan-Meier analysis demonstrated that patients who had reductions within the first 2 weeks of therapy in CD4 T-cell expression of CD38 (P = 0.003) or CD95 (P = 0.08) were more likely to achieve viral suppression than those who did not. CONCLUSIONS Reduced CD4 T-cell expression of CD38 and CD95 occurring within 2 weeks of salvage therapy is associated with subsequent viral suppression. Monitoring CD38 and CD95 may allow earlier assessment of the response to ART.
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Baker CAR, Emenyonu N, Ssewanyana I, Jones NG, Elrefaei M, Nghania F, Nakiwala J, Andia I, Clark R, Martin J, Bangsberg DR, Cao H. Profile of immunologic recovery in HIV-infected Ugandan adults after antiretroviral therapy. AIDS Res Hum Retroviruses 2007; 23:900-5. [PMID: 17678474 DOI: 10.1089/aid.2006.0309] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
HIV infection is characterized by a decrease in total CD4 cell count, rising viral load, as well as an increase in immune activation levels. Increased activation can lead to an increase in apoptosis and contribute to CD4 depletion. We evaluated the clinical and immunologic responses of 23 HIV-positive Ugandan volunteers following initiation of antiretroviral therapy (ART). All volunteers achieved and maintained complete viral suppression within the first 3 months of therapy (p > 0.05). CD4+ and CD8+ T cell activation also decreased significantly, although it never reached the level of HIV negative Ugandan volunteers. Viral suppression and CD4 cell recovery were also associated with an improved profile in CD8+ T cell functional markers, but had no effect on HIV-specific proliferation. We conclude that ART in a cohort of therapy-naive Ugandans with AIDS partially restores but does not fully reverse the immune dysfunction observed in chronic HIV infection.
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Affiliation(s)
- Chris A R Baker
- California Department of Health Services, Richmond, California 94804, USA
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Azzoni L, Chehimi J, Zhou L, Foulkes AS, June R, Maino VC, Landay A, Rinaldo C, Jacobson LP, Montaner LJ. Early and delayed benefits of HIV-1 suppression: timeline of recovery of innate immunity effector cells. AIDS 2007; 21:293-305. [PMID: 17255736 DOI: 10.1097/qad.0b013e328012b85f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The kinetics of recovery for innate immune effectors following antiretroviral therapy are unknown. DESIGN AND METHODS Multiple sequential cryopreserved samples (viremic and ART-suppressed) from 66 patients enrolled in the Women's Interagency HIV Study or Multicenter AIDS Cohort Study cohorts (median follow-up, 700 days) were analyzed to determine natural killer, dendritic and T-cell changes by flow cytometry. Functional parameters were also measured in a subset of samples. Changes over time were analyzed by mixed-effect modeling based on a linear spline with a single knot at 270 days. RESULTS Following viral suppression, a rapid rise in CD4 and white blood cell counts and a decline in T-cell activation were confirmed. However, natural killer cell subsets increased after 270 days of therapy, with a negative effect by baseline CD4%. CD123+ plasmacytoid but not myeloid dendritic cells showed a trend to increase during the first 270 days with a positive effect of baseline CD4%; plasmacytoid dendritic cell-induced interferon-alpha production significantly increased by end of follow-up. CONCLUSIONS The kinetics of natural killer and plasmacytoid dendritic cell recovery are markedly different from those of T-cell subsets, indicative of early and delayed benefits of suppressive regimens.
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Affiliation(s)
- Livio Azzoni
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
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15
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Bégaud E, Chartier L, Marechal V, Ipero J, Léal J, Versmisse P, Breton G, Fontanet A, Capoulade-Metay C, Fleury H, Barré-Sinoussi F, Scott-Algara D, Pancino G. Reduced CD4 T cell activation and in vitro susceptibility to HIV-1 infection in exposed uninfected Central Africans. Retrovirology 2006; 3:35. [PMID: 16792805 PMCID: PMC1524799 DOI: 10.1186/1742-4690-3-35] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2006] [Accepted: 06/22/2006] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Environmentally driven immune activation was suggested to contribute to high rates of HIV-1 infection in Africa. We report here a study of immune activation markers and susceptibility to HIV-1 infection in vitro of forty-five highly exposed uninfected partners (EUs) of HIV-1 infected individuals in Central African Republic, in comparison with forty-four low-risk blood donors (UCs). RESULTS Analysis of T lymphocyte subsets and activation markers in whole blood showed that the absolute values and the percentage of HLA-DR+CD4 T cells and of CCR5+CD4 T cells were lower in the EUs than in the UCs (p = 0.0001). Mutations in the CCR5 coding region were not found in either group. Susceptibility to in vitro infection of unstimulated peripheral blood mononuclear cells, prior of PHA activation, was decreased in EUs compared to UCs, either using a CXCR4-tropic or a CCR5-tropic HIV-1 strain (p = 0.02 and p = 0.05, respectively). Levels of MIP-1beta, but not of MIP-1alpha or RANTES, in the supernatants of PHA-activated PBMC, were higher in the EUs than in the UCs (p = 0.007). CONCLUSION We found low levels of CD4 T cell activation and reduced PBMC susceptibility to HIV-1 infection in Central African EUs, indicating that both may contribute to the resistance to HIV-1 infection.
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Affiliation(s)
- Evélyne Bégaud
- Institut Pasteur, Bangui, CAR
- Centre de Ressources Biologiques de l'Institut Pasteur, Institut Pasteur, Paris, France
| | - Loïc Chartier
- Unité de Recherche et d'Expertise Epidémiologie des Maladies Emergentes, Institut Pasteur, Paris, France
| | - Valéry Marechal
- Institut Pasteur, Bangui, CAR
- Unité Postulante Interactions Moléculaires Flavivirus-Hôtes
| | | | | | - Pierre Versmisse
- Unité de Régulation des Infections Rétrovirales, Institut Pasteur, Paris, France
| | - Guillaume Breton
- Service de Médecine Interne, Groupe Hospitalier Pitié-Salpétrière, Paris, France
| | - Arnaud Fontanet
- Unité de Recherche et d'Expertise Epidémiologie des Maladies Emergentes, Institut Pasteur, Paris, France
| | | | | | | | - Daniel Scott-Algara
- Unité de Régulation des Infections Rétrovirales, Institut Pasteur, Paris, France
| | - Gianfranco Pancino
- Unité de Régulation des Infections Rétrovirales, Institut Pasteur, Paris, France
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16
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Ondoa P, Dieye TN, Vereecken C, Camara M, Diallo AA, Fransen K, Litzroth A, Mboup S, Kestens L. Evaluation of HIV-1 p24 Antigenemia and Level of CD8+CD38+ T cells as Surrogate Markers of HIV-1 RNA Viral Load in HIV-1-Infected Patients in Dakar, Senegal. J Acquir Immune Defic Syndr 2006; 41:416-24. [PMID: 16652048 DOI: 10.1097/01.qai.0000209901.12750.d0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Alternative, affordable, and simple assays to monitor antiretroviral therapy (ART) in resource-poor settings are needed. We have evaluated and compared a heat-denatured (HD) HIV p24 amplified enzyme-linked immunosorbent assay from Perkin-Elmer and CD38CD8 T-cell levels, determined by flow cytometry, for their capacity to predict viral load (VL) in HIV-1-infected patients from Senegal. Median fluorescence intensity (MFI) of CD38 expression on memory (CD45RO) CD8 T cells correlated better with RNA VL than HD p24 antigenemia (R = 0.576, P < 0.0001 vs R = 0.548, P < 0.0001). MFI of CD38 expression on memory CD8 T cells could predict detectable RNA VL (VL = 2.6 log10) with a sensitivity of 87% and a specificity of 74%. A comparable sensitivity (89%) could be reached for HD p24 assay, but only to predict RNA VL of more than 5 logs, which might lead to unacceptable delays in clinical decision making. The clinical use of the HD p24 assay to monitor ART in Senegal would require more comparative data about the kinetics of p24 antigen and HIV RNA in peripheral blood as well as further evaluation regarding its sensitivity toward subtype A and CRF02. MFI of CD38 expression on memory CD8 T cells appeared to be a better alternative to monitor ART in HIV-infected patients from Senegal.
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Affiliation(s)
- Pascale Ondoa
- Institute of Tropical Medicine, Department of Microbiology, Antwerp-Belgium.
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17
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Kaushik S, Vajpayee M, Sreenivas V, Seth P. Correlation of T-lymphocyte subpopulations with immunological markers in HIV-1-infected Indian patients. Clin Immunol 2006; 119:330-8. [PMID: 16476571 DOI: 10.1016/j.clim.2005.12.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2005] [Revised: 12/23/2005] [Accepted: 12/27/2005] [Indexed: 12/20/2022]
Abstract
Progressive HIV disease is characterized by CD4 T cell decline and activation of the immune system. We aimed to study the quantitative alterations in the naive (CD45RA+CD62L+), memory/effector (CD45RO+) and activated (HLA-DR+CD38+) T-lymphocyte subpopulations in antiretroviral treatment naive, HIV-1 infected Indian patients by three-color multi-parametric flow cytometry. The association of different CD4+ and CD8+ T cell subsets with the immunological markers- CD4+ and CD8+ T cell percentages was examined by calculating the partial correlation coefficients. We also observed significant differences in the expression of different CD4+ and CD8+ T-cell subsets among the two groups of patients formed using the median CD4+ T cell percentage value (15%) of the study population. The correlations of different CD4+ and CD8+ T cell subsets reflected the quantitative alterations in the T-lymphocyte subpopulations and activation of the immune system during HIV-infection. The study outcome also emphasizes the significance of the CD38+CD8+ T-lymphocyte subset as a prognostic marker for HIV management and ART monitoring in resource-limited settings of developing countries like India.
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Affiliation(s)
- Shweta Kaushik
- HIV and Immunology Division, Department of Microbiology, All India Institute of Medical Sciences (A.I.I.M.S.), Ansari Nagar, New Delhi-110029, India
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Ondoa P, Koblavi-Dème S, Borget MY, Nolan ML, Nkengasong JN, Kestens L. Assessment of CD8 T cell immune activation markers to monitor response to antiretroviral therapy among HIV-1 infected patients in Côte d'Ivoire. Clin Exp Immunol 2005; 140:138-48. [PMID: 15762885 PMCID: PMC1809342 DOI: 10.1111/j.1365-2249.2005.02734.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/07/2004] [Indexed: 12/14/2022] Open
Abstract
Because of the paucity of plasma HIV RNA viral load (VL) tests in resource-poor settings, the CD4(+) T cell count is often used as the sole laboratory marker to evaluate the effectiveness of antiretroviral therapy (ART) in HIV-infected patients. In untreated patients, the level of activated T cells is positively correlated with VL and represents a prognostic marker of HIV infection. However, little is known about its value to predict early drug failure, taking into account the relatively high non-specific immune activation background observed in many resource-limited tropical countries. We assessed the use of immune activation markers (expression of CD38 and/or human leucocyte antigen-DR on CD8(+) lymphocytes) to predict virological response to ART in a cohort of HIV-1 infected patients in Abidjan, Côte d'Ivoire. Correlations between VL, absolute CD4(+) T cell counts and immune activation levels were examined in 111 HIV patient samples at baseline and after 6 and 12 months of therapy. The percentage of CD38(+) CD8(+) T cells appeared to be the best correlate of VL. In contrast, changes in CD4(+) T cell counts provided a poor correlate of virological response to ART. Unfortunately, CD38(+) CD8(+) percentages lacked specificity for the determination of early virological drug failure and did not appear to be reliable surrogates of RNA viral load. CD38(+) CD8(+) T cell percentages may, rather, provide a sensitive estimate of the overall immune recovery, and be a useful extra laboratory parameter to CD4 counts that would contribute to improve the clinical management of HIV-infected people when VL testing facilities are lacking.
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Affiliation(s)
- P Ondoa
- Institute of Tropical Medicine, Antwerp, Belgium.
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