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Coelho LE, Chazallon C, Laureillard D, Escada R, N’takpe JB, Timana I, Messou E, Eholie S, Khosa C, Chau GD, Cardoso SW, Veloso VG, Delaugerre C, Molina JM, Grinsztejn B, Marcy O, De Castro N. Incidence and Predictors of Tuberculosis-associated IRIS in People With HIV Treated for Tuberculosis: Findings From Reflate TB2 Randomized Trial. Open Forum Infect Dis 2024; 11:ofae035. [PMID: 38486816 PMCID: PMC10939434 DOI: 10.1093/ofid/ofae035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 01/18/2024] [Indexed: 03/17/2024] Open
Abstract
Background After antiretroviral therapy (ART) initiation, people with HIV (PWH) treated for tuberculosis (TB) may develop TB-associated immune reconstitution inflammatory syndrome (TB-IRIS). Integrase inhibitors, by providing a faster HIV-RNA decline than efavirenz, might increase the risk for this complication. We sought to assess incidence and determinants of TB-IRIS in PWH with TB on raltegravir- or efavirenz-based ART. Methods We conducted a secondary analysis of the Reflate TB 2 trial, which randomized ART-naive PWH on standard TB treatment, to receive raltegravir- or efavirenz-based ART. The primary objective was to evaluate the incidence of TB-IRIS. Incidence rate ratio comparing TB-IRIS incidence in each arm was calculated. Kaplan-Meier curves were used to compare TB-IRIS-free survival probabilities by ART arm. Cox regression models were fitted to analyze baseline characteristics associated with TB-IRIS. Results Of 460 trial participants, 453 from Brazil, Côte d'Ivoire, Mozambique, and Vietnam were included in this analysis. Baseline characteristics were median age 35 years (interquartile range [IQR], 29-43), 40% female, 69% pulmonary TB only, median CD4, 102 (IQR, 38-239) cells/mm³, and median HIV RNA, 5.5 (IQR, 5.0-5.8) log copies/mL. Forty-eight participants developed TB-IRIS (incidence rate, 24.7/100 PY), 19 cases in the raltegravir arm and 29 in the efavirenz arm (incidence rate ratio 0.62, 95% confidence interval .35-1.10). Factors associated with TB-IRIS were: CD4 ≤ 100 cells/μL, HIV RNA ≥500 000 copies/mL, and extrapulmonary/disseminated TB. Conclusions We did not demonstrate that raltegravir-based ART increased the incidence of TB-IRIS compared with efavirenz-based ART. Low CD4 counts, high HIV RNA, and extrapulmonary/disseminated TB at ART initiation were associated with TB-IRIS.
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Affiliation(s)
- Lara E Coelho
- National Institute of Infectious Diseases Evandro Chagas, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Corine Chazallon
- National Institute for Health and Medical Research (INSERM) UMR 1219, Research Institute for Sustainable Development (IRD) EMR 271, Bordeaux Population Health Centre, University of Bordeaux, Bordeaux, France
| | - Didier Laureillard
- Department of Infectious and Tropical Diseases, Nimes University Hospital, Nimes, France
- Research Unit 1058, Pathogenesis and Control Chronical Infections, INSERM, French Blood Center, University of Montpellier, Montpellier, France
| | - Rodrigo Escada
- National Institute of Infectious Diseases Evandro Chagas, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Jean-Baptiste N’takpe
- National Institute for Health and Medical Research (INSERM) UMR 1219, Research Institute for Sustainable Development (IRD) EMR 271, Bordeaux Population Health Centre, University of Bordeaux, Bordeaux, France
- Programme PACCI/ANRS Research Center, Abidjan, Côte-d'Ivoire
| | | | - Eugène Messou
- Programme PACCI/ANRS Research Center, Abidjan, Côte-d'Ivoire
- Centre de Prise en Charge de Recherche et de Formation, CePReF-Aconda-VS, Abidjan, Cote D'Ivoire
- Département de Dermatologie et d'Infectiologie, UFR des Sciences Médicales, Université Félix Houphouët Boigny, Abidjan, Cote d'Ivoire
| | - Serge Eholie
- Programme PACCI/ANRS Research Center, Abidjan, Côte-d'Ivoire
- Département de Dermatologie et d'Infectiologie, UFR des Sciences Médicales, Université Félix Houphouët Boigny, Abidjan, Cote d'Ivoire
| | - Celso Khosa
- Instituto Nacional de Saúde, Marracuene, Mozambique
| | - Giang D Chau
- Pham Ngoc Thach Hospital, Ho Chi Minh City, Vietnam
| | - Sandra Wagner Cardoso
- National Institute of Infectious Diseases Evandro Chagas, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Valdiléa G Veloso
- National Institute of Infectious Diseases Evandro Chagas, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Constance Delaugerre
- Virology department, APHP-Hôpital Saint-Louis, Paris, France
- INSERM U944, Paris, France
- Université Paris Cité, Paris, France
| | - Jean-Michel Molina
- INSERM U944, Paris, France
- Université Paris Cité, Paris, France
- Infectious Diseases Department, AP-HP-Hôpital Saint-Louis Lariboisière, Paris, France
| | - Beatriz Grinsztejn
- National Institute of Infectious Diseases Evandro Chagas, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Olivier Marcy
- National Institute for Health and Medical Research (INSERM) UMR 1219, Research Institute for Sustainable Development (IRD) EMR 271, Bordeaux Population Health Centre, University of Bordeaux, Bordeaux, France
| | - Nathalie De Castro
- National Institute for Health and Medical Research (INSERM) UMR 1219, Research Institute for Sustainable Development (IRD) EMR 271, Bordeaux Population Health Centre, University of Bordeaux, Bordeaux, France
- Infectious Diseases Department, AP-HP-Hôpital Saint-Louis Lariboisière, Paris, France
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Moseki RM, Barber DL, Du Bruyn E, Shey M, Van der Plas H, Wilkinson RJ, Meintjes G, Riou C. Phenotypic Profile of Mycobacterium tuberculosis-Specific CD4 T-Cell Responses in People With Advanced Human Immunodeficiency Virus Who Develop Tuberculosis-Associated Immune Reconstitution Inflammatory Syndrome. Open Forum Infect Dis 2023; 10:ofac546. [PMID: 36726536 PMCID: PMC9879713 DOI: 10.1093/ofid/ofac546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 10/17/2022] [Indexed: 01/28/2023] Open
Abstract
Background Tuberculosis-associated immune reconstitution inflammatory syndrome (TB-IRIS) is a frequent complication of cotreatment for TB and human immunodeficiency virus (HIV)-1. We characterized Mycobacterium tuberculosis (Mtb)-specific CD4 T-cell phenotype and transcription factor profile associated with the development of TB-IRIS. Methods We examined the role of CD4 T-cell transcription factors in a murine model of mycobacterial IRIS. In humans, we used a longitudinal study design to compare the magnitude of antiretroviral therapy, activation, transcription factor profile, and cytotoxic potential of Mtb-specific CD4 T cells between TB-IRIS (n = 25) and appropriate non-IRIS control patients (n = 18) using flow cytometry. Results In the murine model, CD4 T-cell expression of Eomesodermin (Eomes), but not Tbet, was associated with experimentally induced IRIS. In patients, TB-IRIS onset was associated with the expansion of Mtb-specific IFNγ+CD4 T cells (P = .039). Patients with TB-IRIS had higher HLA-DR expression (P = .016), but no differences in the expression of T-bet or Eomes were observed. At TB-IRIS onset, Eomes+Tbet+Mtb-specific IFNγ+CD4+ T cells showed higher expression of granzyme B in patients with TB-IRIS (P = .026). Conclusions Although the murine model of Mycobacterium avium complex-IRIS suggests that Eomes+CD4 T cells underly IRIS, TB-IRIS was not associated with Eomes expression in patients. Mycobacterium tuberculosis-specific IFNγ+CD4 T-cell responses in TB-IRIS patients are differentiated, highly activated, and potentially cytotoxic.
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Affiliation(s)
- Raymond M Moseki
- Wellcome Center for Infectious Diseases Research in Africa (CIDRI-Africa), University of Cape Town, Cape Town, South Africa.,Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Daniel L Barber
- T Lymphocyte Biology Section, Laboratory of Parasitic Diseases, National Institute of Health, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, USA
| | - Elsa Du Bruyn
- Wellcome Center for Infectious Diseases Research in Africa (CIDRI-Africa), University of Cape Town, Cape Town, South Africa.,Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Muki Shey
- Wellcome Center for Infectious Diseases Research in Africa (CIDRI-Africa), University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Helen Van der Plas
- Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Robert J Wilkinson
- Wellcome Center for Infectious Diseases Research in Africa (CIDRI-Africa), University of Cape Town, Cape Town, South Africa.,Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa.,Department of Infectious Diseases, Imperial College London, London, United Kingdom.,The Francis Crick Institute, London, United Kingdom
| | - Graeme Meintjes
- Wellcome Center for Infectious Diseases Research in Africa (CIDRI-Africa), University of Cape Town, Cape Town, South Africa.,Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Catherine Riou
- Wellcome Center for Infectious Diseases Research in Africa (CIDRI-Africa), University of Cape Town, Cape Town, South Africa.,Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa.,Department of Pathology, Division of Medical Virology, University of Cape Town, Cape Town, South Africa
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Zhao Y, Hohlfeld A, Namale P, Meintjes G, Maartens G, Engel ME. Risk of Immune Reconstitution Inflammatory Syndrome With Integrase Inhibitors Versus Other Classes of Antiretrovirals: A Systematic Review and Meta-analysis of Randomized Trials. J Acquir Immune Defic Syndr 2022; 90:232-239. [PMID: 35175970 PMCID: PMC7612870 DOI: 10.1097/qai.0000000000002937] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 02/02/2022] [Indexed: 12/03/2022]
Abstract
BACKGROUND Integrase strand transfer inhibitors (InSTIs) decrease HIV plasma viral load faster than other antiretroviral classes. More rapid viral load decline has been associated with higher risk of immune reconstitution inflammatory syndrome (IRIS). There are conflicting reports on the association between InSTI and IRIS. We performed a systematic review and meta-analysis to compare the risk of IRIS among treatment-naive HIV-positive patients starting InSTI versus non-InSTI regimens. METHODS We searched PubMed, Scopus, Web of Science, Africa-Wide, and Cochrane databases from earliest available date to 26 November 2021, for randomized controlled trials (RCTs) having intervention arms with InSTI versus control arms without InSTI in patients initiating first-line antiretroviral therapy. The primary outcome was relative risk (RR) of IRIS, whereas the secondary outcome was RR of paradoxical tuberculosis-associated IRIS (TB-IRIS). Data were combined by random-effects meta-analysis according to the Mantel-Haenszel method. The protocol for this study is registered with PROSPERO, CRD42020213976. RESULTS We included 14 RCTs comprising 8696 participants from 6 continents for the primary outcome of IRIS and a subset of 674 participants (from 3 RCTs) for the secondary outcome of paradoxical TB-IRIS. Risk of IRIS was similar between InSTI and non-InSTI regimens (RR, 0.93; 95% confidence interval: 0.75 to 1.14). There was a trend towards a lower risk of paradoxical TB-IRIS with InSTI versus efavirenz regimens that was not statistically significant (RR, 0.64; 95% confidence interval: 0.34 to 1.19). CONCLUSIONS In this meta-analysis among treatment-naive patients commencing first-line antiretroviral therapy, InSTI regimens were not associated with higher risk of IRIS.
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Affiliation(s)
- Ying Zhao
- Department of Medicine, University of Cape Town, Cape Town, South Africa
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Ameer Hohlfeld
- Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa
| | - Phiona Namale
- Department of Medicine, University of Cape Town, Cape Town, South Africa
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Graeme Meintjes
- Department of Medicine, University of Cape Town, Cape Town, South Africa
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Gary Maartens
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Mark E Engel
- Department of Medicine, University of Cape Town, Cape Town, South Africa
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Li L, Li J, Chai C, Liu T, Li P, Qu M, Zhao H. Association of CD4 T cell count and optimal timing of antiretroviral therapy initiation with immune reconstitution inflammatory syndrome and all-cause mortality for HIV-infected adults with newly diagnosed pulmonary tuberculosis: a systematic review and meta-analysis. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2021; 14:670-679. [PMID: 34239668 PMCID: PMC8255206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 03/07/2021] [Indexed: 06/13/2023]
Abstract
AIMS CD4 T cell count and optimal timing of antiretroviral therapy (ART) during tuberculosis (TB) treatment are challenging. We conducted a meta-analysis to assess the association of CD4 T cell count and timing of ART initiation with immune reconstitution inflammatory syndrome (IRIS) and all-cause mortality of patients co-infected with HIV/TB. METHODS We conducted an electronic search of clinical studies dated from January 1980 to December 2019 in PubMed and EMBASE. Randomized, controlled trials evaluating low-base CD4 T cell count (< 50 cells/μL) versus high-base CD4 T cell count (≥ 50 cells/μL), and/or early ART initiation (1 to 28 days after starting TB treatment) versus delayed ART initiation (≥ 28 days after starting TB treatment) were included. The primary endpoints were all-cause mortality and TB-related immune reconstitution inflammatory syndrome (IRIS-TB). The risk ratio (RR) was calculated as a measure of intervention effect. Mantel-Haenszel method was used to estimate the RR. RESULTS Ten trials (n = 5226) were conducted in North America, Africa, and Asia. We found that low-baseline CD4 T cell count increased the incidence of TB-associated IRIS (RR, 1.47; 95% CI, 1.24-1.75; I2 = 58%) and all-cause mortality (RR, 2.42; 95% CI, 1.71-3.42; I2 = 41%) compared with high baseline CD4 T cell count, and early ART initiation increased the incidence of TB-associated IRIS compared with delayed ART initiation (RR, 1.80; 95% CI, 1.57-2.07; I2 = 74%). However, early ART initiation did not reduce all-cause mortality (RR, 0.91; 95% CI, 0.74-1.12; I2 = 49%) compared with delayed ART initiation. CONCLUSIONS The present study demonstrates that low-baseline CD4 T cell count (< 50 cells/μL) in patients co-infected with TB-HIV increases the incidence of TB-associated IRIS and all-cause mortality. Early ART initiation (≤ 28 days) in patients co-infected with TB-HIV increases the incidence of TB-associated IRIS. However, evidence is insufficient to refute or support a survival benefit conferred by the comparison between early ART initiation (≤ 28 days) and delayed ART initiation.
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Affiliation(s)
- Lifang Li
- Department of Respiratory Medicine, The Second Hospital of Shanxi Medical UniversityTaiyuan 030001, Shanxi Province, P. R. China
| | - Jianqiang Li
- Department of Respiratory Medicine, The Second Hospital of Shanxi Medical UniversityTaiyuan 030001, Shanxi Province, P. R. China
| | - Chunwei Chai
- Department of Internal Medicine, The Fourth People’s Hospital of Shanxi Medical UniversityTaiyuan 030001, Shanxi Province, P. R. China
| | - Tanzhen Liu
- Department of Respiratory Medicine, The Second Hospital of Shanxi Medical UniversityTaiyuan 030001, Shanxi Province, P. R. China
| | - Pingping Li
- Department of Respiratory Medicine, The Second Hospital of Shanxi Medical UniversityTaiyuan 030001, Shanxi Province, P. R. China
| | - Mengrui Qu
- Department of Respiratory Medicine, The Second Hospital of Shanxi Medical UniversityTaiyuan 030001, Shanxi Province, P. R. China
| | - Hui Zhao
- Department of Respiratory Medicine, The Second Hospital of Shanxi Medical UniversityTaiyuan 030001, Shanxi Province, P. R. China
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Mupfumi L, Moyo S, Molebatsi K, Thami PK, Anderson M, Mogashoa T, Iketleng T, Makhema J, Marlink R, Kasvosve I, Essex M, Musonda RM, Gaseitsiwe S. Immunological non-response and low hemoglobin levels are predictors of incident tuberculosis among HIV-infected individuals on Truvada-based therapy in Botswana. PLoS One 2018; 13:e0192030. [PMID: 29385208 PMCID: PMC5792012 DOI: 10.1371/journal.pone.0192030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 01/16/2018] [Indexed: 01/02/2023] Open
Abstract
Background There is a high burden of tuberculosis (TB) in HIV antiretroviral programmes in Africa. However, few studies have looked at predictors of incident TB while on Truvada-based combination antiretroviral therapy (cART) regimens. Methods We estimated TB incidence among individuals enrolled into an observational cohort evaluating the efficacy and tolerability of Truvada-based cART in Gaborone, Botswana between 2008 and 2011. We used Cox proportional hazards regressions to determine predictors of incident TB. Results Of 300 participants enrolled, 45 (15%) had a diagnosis of TB at baseline. During 428 person-years (py) of follow-up, the incidence rate of TB was 3.04/100py (95% CI, 1.69–5.06), with 60% of the cases occurring within 3 months of ART initiation. Incident cases had low baseline CD4+ T cell counts (153cells/mm3 [Q1, Q3: 82, 242]; p = 0.69) and hemoglobin levels (9.2g/dl [Q1, Q3: 8.5,10.1]; p<0.01). In univariate analysis, low BMI (HR = 0.73; 95% CI 0.58–0.91; p = 0.01) and hemoglobin levels <8 g/dl (HR = 10.84; 95%CI: 2.99–40.06; p<0.01) were risk factors for TB. Time to incident TB diagnosis was significantly reduced in patients with poor immunological recovery (p = 0.04). There was no association between baseline viral load and risk of TB (HR = 1.75; 95%CI: 0.70–4.37). Conclusion Low hemoglobin levels prior to initiation of ART are significant predictors of incident tuberculosis. Therefore, there is potential utility of iron biomarkers to identify patients at risk of TB prior to initiation on ART. Furthermore, additional strategies are required for patients with poor immunological recovery to reduce excess risk of TB while on ART.
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Affiliation(s)
- Lucy Mupfumi
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Medical Laboratory Sciences, School of Allied Health Professionals, University of Botswana, Gaborone, Botswana
- * E-mail:
| | - Sikhulile Moyo
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Immunology and Infectious Diseases, Harvard TH Chan School of Public Health, Boston, Massachusetts, United States of America
| | | | - Prisca K. Thami
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Biological Sciences, University of Botswana, Gaborone, Botswana
| | - Motswedi Anderson
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Biological Sciences, University of Botswana, Gaborone, Botswana
| | - Tuelo Mogashoa
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Medical Laboratory Sciences, School of Allied Health Professionals, University of Botswana, Gaborone, Botswana
| | - Thato Iketleng
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- College of Health Sciences, University of KwaZulu-Natal, Durban, Republic of South Africa
| | - Joseph Makhema
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Immunology and Infectious Diseases, Harvard TH Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Ric Marlink
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Immunology and Infectious Diseases, Harvard TH Chan School of Public Health, Boston, Massachusetts, United States of America
- Rutgers Global Health Institute, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Ishmael Kasvosve
- Department of Medical Laboratory Sciences, School of Allied Health Professionals, University of Botswana, Gaborone, Botswana
| | - Max Essex
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Immunology and Infectious Diseases, Harvard TH Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Rosemary M. Musonda
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Immunology and Infectious Diseases, Harvard TH Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Simani Gaseitsiwe
- Botswana Harvard AIDS Institute Partnership, Gaborone, Botswana
- Department of Immunology and Infectious Diseases, Harvard TH Chan School of Public Health, Boston, Massachusetts, United States of America
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Abstract
The modulation of tuberculosis (TB)-induced immunopathology caused by human immunodeficiency virus (HIV)-1 coinfection remains incompletely understood but underlies the change seen in the natural history, presentation, and prognosis of TB in such patients. The deleterious combination of these two pathogens has been dubbed a "deadly syndemic," with each favoring the replication of the other and thereby contributing to accelerated disease morbidity and mortality. HIV-1 is the best-recognized risk factor for the development of active TB and accounts for 13% of cases globally. The advent of combination antiretroviral therapy (ART) has considerably mitigated this risk. Rapid roll-out of ART globally and the recent recommendation by the World Health Organization (WHO) to initiate ART for everyone living with HIV at any CD4 cell count should lead to further reductions in HIV-1-associated TB incidence because susceptibility to TB is inversely proportional to CD4 count. However, it is important to note that even after successful ART, patients with HIV-1 are still at increased risk for TB. Indeed, in settings of high TB incidence, the occurrence of TB often remains the first presentation of, and thereby the entry into, HIV care. As advantageous as ART-induced immune recovery is, it may also give rise to immunopathology, especially in the lower-CD4-count strata in the form of the immune reconstitution inflammatory syndrome. TB-immune reconstitution inflammatory syndrome will continue to impact the HIV-TB syndemic.
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7
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Dirix V, Schepers K, Massinga-Loembe M, Worodria W, Colebunders R, Singh M, Locht C, Kestens L, Mascart F. Added Value of Long-Term Cytokine Release Assays to Detect Mycobacterium tuberculosis Infection in HIV-Infected Subjects in Uganda. J Acquir Immune Defic Syndr 2016; 72:344-52. [PMID: 27306506 PMCID: PMC4915752 DOI: 10.1097/qai.0000000000000980] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 02/25/2016] [Indexed: 01/01/2023]
Abstract
OBJECTIVES To investigate whether mycobacterial antigen-induced cytokine secretions are helpful in detecting Mycobacterium tuberculosis (Mtb) infection in a cohort of HIV-infected patients living in a country with a high burden of Mtb and HIV infections, and to determine their predictive value for the development of tuberculosis (TB)-associated immune reconstitution inflammatory syndrome. DESIGN A total of 352 HIV-infected patients (186 with active TB) were prospectively enrolled when initiating antiretroviral therapy (ART). Sequential blood samples were collected during the first 6 months of ART. Eighty-three HIV-uninfected subjects (39 with active TB) were enrolled as controls. METHODS The concentrations of 13 cytokines were measured in supernatants from blood mononuclear cells in vitro stimulated with purified protein derivative (PPD), heparin-binding hemagglutinin (HBHA) or early secreted antigen-6 (ESAT-6) and culture filtrate protein-10 (CFP-10), and results were compared with those of tuberculin skin tests (TST). RESULTS The best detection of Mtb infection was achieved by ESAT-6/CFP-10-induced interferon-γ concentrations, but results were often negative for patients with CD4 T-cell counts <50 per cubic millimeters. Patients with active TB were identified by high ESAT-6/CFP-10-induced interleukin-6. Conversions of interferon-γ-release assays (IGRA) and TST occurred under ART, and combined TB and antiretroviral treatments of coinfected patients resulted in a decrease of ESAT-6/CFP-10-induced and an increase of HBHA-induced interferon-γ responses. No Mtb antigen-induced cytokines allowed us to predict TB-immune reconstitution inflammatory syndrome or ART-associated TB. CONCLUSIONS In Uganda, ESAT-6/CFP-10-IGRA is better in detecting Mtb infection than TST and, when combined with an HBHA-IGRA, could help to evaluate anti-TB treatment success.
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Affiliation(s)
- Violette Dirix
- Laboratory of Vaccinology and Mucosal Immunity, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Kinda Schepers
- Laboratory of Vaccinology and Mucosal Immunity, Université Libre de Bruxelles (ULB), Brussels, Belgium
- Currently, CHU Pointe-à-Pitre, Pointe-à-Pitre, Guadeloupe
| | - Marguerite Massinga-Loembe
- Laboratory of Immunology, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Currently, Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Département de Bacterio-virologie, Université des Sciences de la Santé, Libreville, Gabon
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - William Worodria
- Department of Medicine, Mulago Hospital, College of Health Sciences, Makarere University, Kampala, Uganda
| | - Robert Colebunders
- Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Epidemiology and Social Medicine, University of Antwerp, Antwerp, Belgium
- Currently, International Health Unit, Faculty of Medicine and Health Sciences, Gouverneur Kinsbergen Centrum, University of Antwerp, Wilkrijk, Belgium
| | - Mahavir Singh
- Lionex Diagnostics & Therapeutics, Braunschweig, Germany
| | - Camille Locht
- CNRS, UMR8204, Lille, France
- University of Lille, U1019—UMR8204-CIIL-, Center for Infection and Immunity of Lille, Lille, France
- Institut Pasteur de Lille, Lille, France
| | - Luc Kestens
- Laboratory of Immunology, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium; and
| | - Françoise Mascart
- Immunobiology Clinic, Hôpital Erasme, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - TB-IRIS study group
- Laboratory of Vaccinology and Mucosal Immunity, Université Libre de Bruxelles (ULB), Brussels, Belgium
- Currently, CHU Pointe-à-Pitre, Pointe-à-Pitre, Guadeloupe
- Laboratory of Immunology, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Currently, Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Département de Bacterio-virologie, Université des Sciences de la Santé, Libreville, Gabon
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
- Department of Medicine, Mulago Hospital, College of Health Sciences, Makarere University, Kampala, Uganda
- Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Epidemiology and Social Medicine, University of Antwerp, Antwerp, Belgium
- Currently, International Health Unit, Faculty of Medicine and Health Sciences, Gouverneur Kinsbergen Centrum, University of Antwerp, Wilkrijk, Belgium
- Lionex Diagnostics & Therapeutics, Braunschweig, Germany
- Inserm, U1019, Lille, France
- CNRS, UMR8204, Lille, France
- University of Lille, U1019—UMR8204-CIIL-, Center for Infection and Immunity of Lille, Lille, France
- Institut Pasteur de Lille, Lille, France
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium; and
- Immunobiology Clinic, Hôpital Erasme, Université Libre de Bruxelles (ULB), Brussels, Belgium
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8
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Namale PE, Abdullahi LH, Fine S, Kamkuemah M, Wilkinson RJ, Meintjes G. Paradoxical TB-IRIS in HIV-infected adults: a systematic review and meta-analysis. Future Microbiol 2016; 10:1077-99. [PMID: 26059627 DOI: 10.2217/fmb.15.9] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Paradoxical tuberculosis immune reconstitution inflammatory syndrome (TB-IRIS) was first described almost two decades ago. We undertook this systematic review and meta-analysis to collate findings across studies that have reported the incidence, clinical features, management and outcomes of paradoxical TB-IRIS. Forty studies that cumulatively reported 1048 paradoxical TB-IRIS cases were included. The pooled estimated incidence among patients with HIV-associated TB initiating antiretroviral therapy was 18% (95% CI: 16-21%). Frequent features were pulmonary and lymph node involvement. Hospitalization occurred in 25% (95% CI: 19-30%). In studies that reported treatment, corticosteroids were prescribed more frequently (38%; 95% CI: 27-48%) than nonsteroidal anti-inflammatory drugs (28%; 95% CI: 2-53%). Case fatality was 7% (95% CI: 4-11%), but death attributed to TB-IRIS occurred in 2% of cases (95% CI: 1-3%).
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Affiliation(s)
- Phiona E Namale
- Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Leila H Abdullahi
- Vaccines for Africa Initiative, Institute of Infectious Disease & Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Stacey Fine
- Department of Medicine, New Somerset Hospital, Cnr Beach & Lower Portswood Road, Green Point, Cape Town 8001, Western Cape, South Africa
| | - Monika Kamkuemah
- Division of Epidemiology & Biostatistics, School of Public Health & Family Medicine, University of Cape Town, Cape Town, South Africa
| | - Robert J Wilkinson
- Department of Medicine, University of Cape Town, Cape Town, South Africa.,Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease & Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town 7925, South Africa.,Department of Medicine, Imperial College London, W2 1PG, UK.,Medical Research Council, National Institute of Medical Research, London, NW7 1AA, UK
| | - Graeme Meintjes
- Department of Medicine, University of Cape Town, Cape Town, South Africa.,Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease & Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town 7925, South Africa.,Department of Medicine, Imperial College London, W2 1PG, UK
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9
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HIV-1 tuberculosis-associated immune reconstitution inflammatory syndrome. Semin Immunopathol 2015; 38:185-98. [PMID: 26423994 PMCID: PMC4779131 DOI: 10.1007/s00281-015-0532-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 09/21/2015] [Indexed: 12/13/2022]
Abstract
Patients co-infected with HIV-1 and tuberculosis (TB) are at risk of developing TB-associated immune reconstitution inflammatory syndrome (TB-IRIS) following commencement of antiretroviral therapy (ART). TB-IRIS is characterized by transient but severe localized or systemic inflammatory reactions against Mycobacterium tuberculosis antigens. Here, we review the risk factors and clinical management of TB-IRIS, as well as the roles played by different aspects of the immune response in contributing to TB-IRIS pathogenesis.
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10
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Walker NF, Scriven J, Meintjes G, Wilkinson RJ. Immune reconstitution inflammatory syndrome in HIV-infected patients. HIV AIDS (Auckl) 2015; 7:49-64. [PMID: 25709503 PMCID: PMC4334287 DOI: 10.2147/hiv.s42328] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Access to antiretroviral therapy (ART) is improving worldwide. Immune reconstitution inflammatory syndrome (IRIS) is a common complication of ART initiation. In this review, we provide an overview of clinical and epidemiological features of HIV-associated IRIS, current understanding of pathophysiological mechanisms, available therapy, and preventive strategies. The spectrum of HIV-associated IRIS is described, with a particular focus on three important pathogen-associated forms: tuberculosis-associated IRIS, cryptococcal IRIS, and Kaposi's sarcoma IRIS. While the clinical features and epidemiology are well described, there are major gaps in our understanding of pathophysiology and as a result therapeutic and preventative strategies are suboptimal. Timing of ART initiation is critical to reduce IRIS-associated morbidity. Improved understanding of the pathophysiology of IRIS will hopefully enable improved diagnostic modalities and better targeted treatments to be developed.
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Affiliation(s)
- Naomi F Walker
- Department of Medicine, Imperial College London, London, UK
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - James Scriven
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- Department of Medicine, University of Cape Town, Cape Town, South Africa
- Liverpool School of Tropical Medicine, Liverpool, UK
| | - Graeme Meintjes
- Department of Medicine, Imperial College London, London, UK
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Robert J Wilkinson
- Department of Medicine, Imperial College London, London, UK
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- MRC National Institute of Medical Research, London, UK
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11
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Antigen-specific interferon-gamma responses and innate cytokine balance in TB-IRIS. PLoS One 2014; 9:e113101. [PMID: 25415590 PMCID: PMC4240578 DOI: 10.1371/journal.pone.0113101] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 10/19/2014] [Indexed: 12/11/2022] Open
Abstract
Background Tuberculosis-associated immune reconstitution inflammatory syndrome (TB-IRIS) remains a poorly understood complication in HIV-TB patients receiving antiretroviral therapy (ART). TB-IRIS could be associated with an exaggerated immune response to TB-antigens. We compared the recovery of IFNγ responses to recall and TB-antigens and explored in vitro innate cytokine production in TB-IRIS patients. Methods In a prospective cohort study of HIV-TB co-infected patients treated for TB before ART initiation, we compared 18 patients who developed TB-IRIS with 18 non-IRIS controls matched for age, sex and CD4 count. We analyzed IFNγ ELISpot responses to CMV, influenza, TB and LPS before ART and during TB-IRIS. CMV and LPS stimulated ELISpot supernatants were subsequently evaluated for production of IL-12p70, IL-6, TNFα and IL-10 by Luminex. Results Before ART, all responses were similar between TB-IRIS patients and non-IRIS controls. During TB-IRIS, IFNγ responses to TB and influenza antigens were comparable between TB-IRIS patients and non-IRIS controls, but responses to CMV and LPS remained significantly lower in TB-IRIS patients. Production of innate cytokines was similar between TB-IRIS patients and non-IRIS controls. However, upon LPS stimulation, IL-6/IL-10 and TNFα/IL-10 ratios were increased in TB-IRIS patients compared to non-IRIS controls. Conclusion TB-IRIS patients did not display excessive IFNγ responses to TB-antigens. In contrast, the reconstitution of CMV and LPS responses was delayed in the TB-IRIS group. For LPS, this was linked with a pro-inflammatory shift in the innate cytokine balance. These data are in support of a prominent role of the innate immune system in TB-IRIS.
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12
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Badaró R, Gonçalves LO, Gois LL, Maia ZPG, Benson C, Grassi MFR. Leishmaniasis as a Manifestation of Immune Reconstitution Inflammatory Syndrome (IRIS) in HIV-Infected Patients: A Literature Review. J Int Assoc Provid AIDS Care 2014; 14:402-7. [PMID: 25331225 DOI: 10.1177/2325957414555225] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
INTRODUCTION After the onset of highly active antiretroviral therapy (HAART), some HIV-infected patients present a severe inflammation in response to a latent or a previously treated opportunistic pathogen termed immune reconstitution inflammatory syndrome (IRIS). Few reports of tegumentary and visceral leishmaniasis have been described in association with IRIS. METHODS A systematic literature review of IRIS in association with leishmaniasis identified 34 reported cases. RESULTS AND DISCUSSION The majority of these occurred in males 4 months following the onset of HAART. The mean CD4 count before HAART was 94 ± 77 cells/mm³ increasing to 5 times the initial value between the onset of HAART and IRIS presentation. Visceral leishmaniasis and post-kala-azar dermal leishmaniasis were the most commonly reported clinical manifestations, followed by tegumentary leishmaniasis and uveitis. CONCLUSIONS Commonly found characteristics included cutaneous involvement, regardless of Leishmania species; appearance of lesions unrelated to time of probable Leishmania infection; rapid recovery of CD4 count following HAART; and rapid progression.
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Affiliation(s)
- Roberto Badaró
- Universidade Federal da Bahia, Complexo Hospitalar Prof Edgard Santos, Unidade docente de Infectologia, Salvador, BA, Brazil
| | - Larissa O Gonçalves
- Universidade Federal da Bahia, Complexo Hospitalar Prof Edgard Santos, Unidade docente de Infectologia, Salvador, BA, Brazil
| | - Luana L Gois
- Fundação Oswaldo Cruz, Centro de Pesquisa Gonçalo Moniz, Laboratório Avançado de Saúde Pública, Salvador, BA, Brazil Escola Bahiana de Medicina e Saúde Pública, Faculdade de Medicina, Salvador, BA, Brazil
| | - Zuinara Pereira Gusmão Maia
- Universidade Federal da Bahia, Complexo Hospitalar Prof Edgard Santos, Unidade docente de Infectologia, Salvador, BA, Brazil
| | - Constance Benson
- University of California San Diego, Division of Infectious Diseases, La Jolla, CA, USA
| | - Maria Fernanda Rios Grassi
- Fundação Oswaldo Cruz, Centro de Pesquisa Gonçalo Moniz, Laboratório Avançado de Saúde Pública, Salvador, BA, Brazil Escola Bahiana de Medicina e Saúde Pública, Faculdade de Medicina, Salvador, BA, Brazil
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13
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TB-IRIS after initiation of antiretroviral therapy is associated with expansion of preexistent Th1 responses against Mycobacterium tuberculosis antigens. J Acquir Immune Defic Syndr 2014; 64:241-8. [PMID: 23774879 DOI: 10.1097/qai.0b013e31829f6df2] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND The role of T-cell responses against Mycobacterium tuberculosis antigens in tuberculosis-associated immune reconstitution inflammatory syndrome (TB-IRIS) is unclear. METHODS Peripheral blood mononuclear cells from 45 HIV patients with treated TB, of whom 12 developed TB-IRIS, were collected at weeks 0, 2, and 6 of antiretroviral therapy (ART). Production of interferon-gamma (IFN-γ) and interleukin-2 by T cells after stimulation with purified protein derivative (PPD) or early secretory antigenic target-6 (ESAT-6) and T-cell expressions of CCR5 and CXCR3 were assessed by flow cytometry. IFN-γ and CXCL10 were assayed by enzyme-linked immunosorbent assay. RESULTS TB-IRIS patients had higher proportions of PPD- and ESAT-6-reactive IFN-γ⁺CD4⁺ and CD3⁺CD4⁻ T cells at weeks 0, 2, and 6. IFN-γ levels were also higher in peripheral blood mononuclear cell culture supernatants at all times with PPD but only at weeks 2 and 6 with ESAT-6. There were few differences for interleukin-2. CXCL10 levels in supernatants after PPD and ESAT-6 stimulation were only higher at week 6. CXCR3⁺/CCR5⁺CD4⁺ T cells were higher at week 2, and CCR5⁺CD4⁺ T cells were higher at week 6. CONCLUSIONS TB-IRIS is associated with Th1 responses against M. tuberculosis antigens by CD4⁺ and CD3⁺CD4⁻ T cells that are present before ART and amplified afterward. It is unclear if these cause immunopathology or reflect a high pathogen load.
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14
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Lai RPJ, Nakiwala JK, Meintjes G, Wilkinson RJ. The immunopathogenesis of the HIV tuberculosis immune reconstitution inflammatory syndrome. Eur J Immunol 2013; 43:1995-2002. [PMID: 23928963 DOI: 10.1002/eji.201343632] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 06/16/2013] [Accepted: 07/15/2013] [Indexed: 11/09/2022]
Abstract
HIV-1 patients co-infected with some pathogens are at risk of developing the immune reconstitution inflammatory syndrome (IRIS) when initiating antiretroviral therapy (ART). IRIS is characterized by inflammation leading to the clinical worsening of a treated infection or the unmasking of a previously undiagnosed condition or infection. It is commonly associated with tuberculosis (TB), 8-43% of the HIV-TB co-infected patients prescribed with antitubercular treatment and ART develop TB-IRIS. Although IRIS has been recognized for over 20 years, relatively little was known until recently about its pathogenesis. Despite these advances in understanding IRIS, there remains no immune biomarker for diagnostic or prognostic purposes. Here, we review the risk factors associated with TB-IRIS, the challenges in studying this syndrome, and how T lymphocytes, dysregulated cytokine responses, and innate immunity may contribute to the development of TB-IRIS.
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15
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Tran HTT, Van den Bergh R, Vu TN, Laukens K, Worodria W, Loembé MM, Colebunders R, Kestens L, De Baetselier P, Raes G. The role of monocytes in the development of Tuberculosis-associated Immune Reconstitution Inflammatory Syndrome. Immunobiology 2013; 219:37-44. [PMID: 23958034 DOI: 10.1016/j.imbio.2013.07.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 07/02/2013] [Accepted: 07/05/2013] [Indexed: 01/29/2023]
Abstract
BACKGROUND Tuberculosis-associated Immune Reconstitution Inflammatory Syndrome (TB-IRIS) is a common complication of combined antiretroviral therapy (cART) in HIV-TB co-infected patients. However, the disease mechanism is poorly understood, prognosis of TB-IRIS is currently impossible, and diagnosis is highly challenging. We analyzed whether the gene expression of monocytes could be correlated with TB-IRIS pathogenesis and could be used to classify patients predisposed to TB-IRIS. METHODS Monocyte gene expression was compared between patients who developed TB-IRIS and matched controls. We carried out whole-genome expression profiling using Affymetrix GeneChip(®) ST 1.1 arrays at two time-points: before cART initiation (baseline) and at week two post-cART initiation. For each time-point, we used different statistical approaches to identify molecular signatures which could be used as classifiers. We also functionally mapped the modulated cellular pathways using the software package Ingenuity Pathway Analysis. RESULTS At baseline, before introduction of cART and before onset of symptoms, monocyte gene expression was already perturbed in patients who subsequently developed TB-IRIS, indicating a possible involvement of monocytes in TB-IRIS predisposition. The differences in monocyte gene expression in TB-IRIS patients became even more clear after two weeks of cART (when TB-IRIS commonly occurs), with more than 100 genes for which expression showed a fold change greater than 1.5. Both at baseline and at week two post-cART initiation, a classifier of 8 and 9 genes, respectively could be built, which allowed discrimination of TB-IRIS cases and controls. Pathway analyses revealed that the majority of the dysregulated genes in TB-IRIS - at the time of the IRIS episode, but also already at baseline - are associated with infection and inflammation. Relevant biological functions which were perturbed before/during TB-IRIS included "Role of Pattern Recognition Receptors in Recognition of Bacteria and Viruses" and "Complement System". CONCLUSION Our results indicate an involvement of monocytes in predisposition to/development of TB-IRIS, and suggest a number of functional pathways which may play a role in TB-IRIS development. This comprehensive study of gene regulation in monocytes provides baseline data for further studies into biomarkers for prognosis and diagnosis of TB-IRIS.
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Affiliation(s)
- Huyen Thi Thanh Tran
- Cellular and Molecular Immunology Unit, Vrije Universiteit Brussel, Brussels, Belgium; Myeloid Cell Immunology Laboratory, VIB, Brussels, Belgium
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16
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Chang CC, Crane M, Zhou J, Mina M, Post JJ, Cameron BA, Lloyd AR, Jaworowski A, French MA, Lewin SR. HIV and co-infections. Immunol Rev 2013; 254:114-42. [PMID: 23772618 PMCID: PMC3697435 DOI: 10.1111/imr.12063] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Despite significant reductions in morbidity and mortality secondary to availability of effective combination anti-retroviral therapy (cART), human immunodeficiency virus (HIV) infection still accounts for 1.5 million deaths annually. The majority of deaths occur in sub-Saharan Africa where rates of opportunistic co-infections are disproportionately high. In this review, we discuss the immunopathogenesis of five common infections that cause significant morbidity in HIV-infected patients globally. These include co-infection with Mycobacterium tuberculosis, Cryptococcus neoformans, hepatitis B virus, hepatitis C virus, and Plasmodium falciparum. Specifically, we review the natural history of each co-infection in the setting of HIV, the specific immune defects induced by HIV, the effects of cART on the immune response to the co-infection, the pathogenesis of immune restoration disease (IRD) associated with each infection, and advances in the areas of prevention of each co-infection via vaccination. Finally, we discuss the opportunities and gaps in knowledge for future research.
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Affiliation(s)
- Christina C Chang
- Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, Australia
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17
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Chang CC, Lim A, Omarjee S, Levitz SM, Gosnell BI, Spelman T, Elliott JH, Carr WH, Moosa MYS, Ndung'u T, Lewin SR, French MA. Cryptococcosis-IRIS is associated with lower cryptococcus-specific IFN-γ responses before antiretroviral therapy but not higher T-cell responses during therapy. J Infect Dis 2013; 208:898-906. [PMID: 23766525 DOI: 10.1093/infdis/jit271] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Cryptococcosis-associated immune reconstitution inflammatory syndrome (C-IRIS) may be driven by aberrant T-cell responses against cryptococci. We investigated this in human immunodeficiency virus (HIV)-infected patients with treated cryptococcal meningitis (CM) commencing combination antiretroviral therapy (cART). METHODS Mitogen- and cryptococcal mannoprotein (CMP)-activated (CD25+CD134+) CD4+ T cells and -induced production of interferon-gamma (IFN-γ), IL-10, and CXCL10 were assessed in whole blood cultures in a prospective study of 106 HIV-CM coinfected patients. RESULTS Patients with paradoxical C-IRIS (n = 27), compared with patients with no neurological deterioration (no ND; n = 63), had lower CMP-induced IFN-γ production in 24-hour cultures pre-cART and 4 weeks post-cART (P = .0437 and .0257, respectively) and lower CMP-activated CD4+ T-cell counts pre-cART (P = .0178). Patients surviving to 24 weeks had higher proportions of mitogen-activated CD4+ T cells and higher CMP-induced CXCL10 and IL-10 production in 24-hour cultures pre-cART than patients not surviving (P = .0053, .0436 and .0319, respectively). C-IRIS was not associated with higher CMP-specific T-cell responses before or during cART. CONCLUSION Greater preservation of T-cell function and higher CMP-induced IL-10 and CXCL10 production before cART are associated with improved survival while on cART. Lower CMP-induced IFN-γ production pre-cART, but not higher CMP-specific T-cell responses after cART, were risk factors for C-IRIS.
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Affiliation(s)
- Christina C Chang
- Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, Australia
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18
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Espinosa E, Romero-Rodríguez DP, Cantoral-Díaz MT, Reyes-Terán G. Transient expansion of activated CD8(+) T cells characterizes tuberculosis-associated immune reconstitution inflammatory syndrome in patients with HIV: a case control study. JOURNAL OF INFLAMMATION-LONDON 2013; 10:21. [PMID: 23688318 PMCID: PMC3679878 DOI: 10.1186/1476-9255-10-21] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 05/13/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND CD4(+) T cell activation indicators have been reported to be a common phenomenon underlying diverse manifestations of immune reconstitution inflammatory syndrome (IRIS). However, we have found that a high frequency of circulating CD8(+) T cells is a specific risk factor for mycobacterial IRIS. Therefore, we investigated whether CD8(+) T cells from patients who develop TB IRIS were specifically activated. METHODS We obtained PBMCs from HIV+ patients prior to and 4, 8, 12, 24, 52 and 104 weeks after initiating antiretroviral therapy. CD38 and HLADR expression on naive, central memory and effector memory CD8(+) and CD4(+) T cells were determined by flow cytometry. Absolute counts and frequencies of CD8(+) T cell subsets were compared between patients who developed TB IRIS, who developed other IRIS forms and who remained IRIS-free. RESULTS TB IRIS patients showed significantly higher counts of naive CD8(+) T cells than the other groups at most time points, with a contraction of the effector memory subpopulation occurring later in the follow-up period. Activated (CD38(+) HLADR(+)) CD8(+) T cells from all groups decreased with treatment but transiently peaked in TB IRIS patients. This increase was due to an increase in activated naive CD8(+) T cell counts during IRIS. Additionally, the CD8(+) T cell subpopulations of TB IRIS patients expressed HLADR without CD38 more frequently and expressed CD38 without HLADR less frequently than cells from other groups. CONCLUSIONS CD8(+) T cell activation is specifically relevant to TB IRIS. Different IRIS forms may involve different alterations in T cell subsets, suggesting different underlying inflammatory processes.
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Affiliation(s)
- Enrique Espinosa
- Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Calzada de Tlalpan 4502, 14080 México, D.F.Mexico.,Present address: Laboratorio de Inmunobiología y Genética, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Calzada de Tlalpan 4502, 14080 México, D.F.Mexico
| | - Dámaris P Romero-Rodríguez
- Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Calzada de Tlalpan 4502, 14080 México, D.F.Mexico.,Present address: Laboratorio de Inmunobiología y Genética, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Calzada de Tlalpan 4502, 14080 México, D.F.Mexico
| | - María-Teresa Cantoral-Díaz
- Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Calzada de Tlalpan 4502, 14080 México, D.F.Mexico
| | - Gustavo Reyes-Terán
- Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Calzada de Tlalpan 4502, 14080 México, D.F.Mexico
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Wilson H, de Jong BC, Peterson K, Jaye A, Kampmann B, Ota MOC, Sutherland JS. Skewing of the CD4(+) T-cell pool toward monofunctional antigen-specific responses in patients with immune reconstitution inflammatory syndrome in The Gambia. Clin Infect Dis 2013; 57:594-603. [PMID: 23645847 DOI: 10.1093/cid/cit285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND A common complication of starting antiretroviral therapy (ART) for human immunodeficiency virus (HIV) is the development of immune reconstitution inflammatory syndrome (IRIS) in approximately 25% of patients. Despite similarities with paradoxical reactions to tuberculosis and reversal reactions in leprosy, the exact mechanisms, and therefore potential determinants, of IRIS are still unknown. METHODS In this longitudinal cohort study, we analyzed 20 patients who developed IRIS following initiation of ART and 16 patients who did not, matched for ART time point. Peripheral blood mononuclear cells were stimulated overnight with a positive control antigen and 2 tuberculosis-specific antigens (purified protein derivative [PPD] and ESAT-6/CFP10), followed by polychromatic flow cytometry for analysis of cytokine production from CD4(+) and CD8(+) T cells. RESULTS Responses to PPD were significantly higher in IRIS patients compared to controls during the IRIS time point, but CD4(+) and CD8(+) T-cell responses to the positive control stimulation were significantly lower in IRIS patients at all time points. Furthermore, whereas control patients had rejuvenated polyfunctional T-cell responses by 3 months after ART, IRIS patients were strikingly monofunctional (generally interferon γ alone), even up to 6 months of ART in response to all stimulations. CONCLUSIONS Our findings suggest that the peripheral T-cell responses to the underlying pathogen are exaggerated in IRIS patients but that the overall quality of the peripheral T-cell pool is significantly reduced compared to non-IRIS patients. Furthermore, these effects are apparent at least up to 3 months after cessation of IRIS.
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Affiliation(s)
- Harry Wilson
- Vaccinology Theme, Medical Research Council Unit, Fajara, The Gambia
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20
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Post-Kala-Azar Dermal Leishmaniasis: A Paradigm of Paradoxical Immune Reconstitution Syndrome in Non-HIV/AIDS Patients. J Trop Med 2013; 2013:275253. [PMID: 23634148 PMCID: PMC3619621 DOI: 10.1155/2013/275253] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 02/21/2013] [Indexed: 11/17/2022] Open
Abstract
Visceral leishmaniasis (VL) is a parasitic disease characterized by immune suppression. Successful treatment is usually followed by immune reconstitution and a dermatosis called post-Kala-azar dermal leishmaniasis (PKDL). Recently, PKDL was described as one of the immune reconstitution syndromes (IRISs) in HIV/VL patients on HAART. This study aimed to present PKDL as a typical example of paradoxical IRIS in non-HIV/AIDS individuals. Published and new data on the pathogenesis and healing of PKDL was reviewed and presented. The data suggested that PKDL is a typical example of paradoxical IRIS, being a new disease entity that follows VL successful treatment and immune recovery. PKDL lesions are immune inflammatory in nature with granuloma, adequate response to immunochemotherapy, and an ensuing hypersensitivity reaction, the leishmanin skin test (LST). The data also suggested that the cytokine patterns of PKDL pathogenesis and healing are probably as follows: an active disease state dominated by IL-10 followed by spontaneous/treatment-induced IL-12 priming, IL-2 stimulation, and INF-γ production. INF-γ-activated macrophages eliminate the Leishmania parasites/antigen to be followed by LST conversion and healing. In conclusion, PKDL is a typical example of paradoxical IRIS in non-HIV/AIDS individuals with anti-inflammatory cytokine patterns that are superseded by treatment-induced proinflammatory cytokines and lesions healing.
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Tuberculosis after commencing antiretroviral therapy for HIV infection is associated with elevated CXCL9 and CXCL10 responses to Mycobacterium tuberculosis antigens. J Acquir Immune Defic Syndr 2013; 61:287-92. [PMID: 22732467 DOI: 10.1097/qai.0b013e31826445ef] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Commencing antiretroviral therapy (ART) in human immunodeficiency virus-infected patients with treated or unrecognized Mycobacterium tuberculosis disease may trigger tuberculosis-associated immune reconstitution inflammatory syndrome (TB-IRIS) or ART-associated tuberculosis (ART-TB). We have shown that whole-blood interferon-gamma release assays may aid in the prediction and diagnosis of ART-TB. Here, we investigate interferon-gamma-inducible chemokines CXCL9 and CXCL10. METHODS CXCL9 and CXCL10 responses to region of difference 1 (RD1) antigens and purified protein derivative (PPD) were assayed in plasma from whole-blood cultures collected before and after 4, 12, and 24 weeks of ART from 15 TB-IRIS cases, 11 ART-TB cases, and matched controls. RESULTS Relative to matched controls, ART-TB cases had elevated CXCL10 responses to RD1 antigens pre-ART (P = 0.02) and to PPD and RD1 antigens over 24 weeks of ART (P ≤ 0.02 and P ≤ 0.03). In contrast, TB-IRIS cases had higher CXCL10 responses to RD1 antigens before and after 4 weeks of ART only (P = 0.04 for both). CXCL9 responses to PPD and RD1 antigens were similar but less pronounced in ART-TB cases and did not differ between TB-IRIS cases and controls. CXCL10 responses to RD1 antigens performed as well as, or better than, IFN-γ responses in the prediction and diagnosis of ART-TB. CONCLUSIONS Tuberculosis after commencing ART is associated with increased CXCL10 and, to a lesser extent, CXCL9 responses to M. tuberculosis antigens. Assessment of antigen-induced CXCL10 responses to RD1 antigens may assist in the prediction and diagnosis of ART-TB.
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Abstract
TB causes 1.4 million deaths annually. HIV-1 infection is the strongest risk factor for TB. The characteristic immunological effect of HIV is on CD4 cell count. However, the risk of TB is elevated in HIV-1 infected individuals even in the first few years after HIV acquisition and also after CD4 cell counts are restored with antiretroviral therapy. In this review, we examine features of the immune response to TB and how this is affected by HIV-1 infection and vice versa. We discuss how the immunology of HIV-TB coinfection impacts on the clinical presentation and diagnosis of TB, and how antiretroviral therapy affects the immune response to TB, including the development of TB immune reconstitution inflammatory syndrome. We highlight important areas of uncertainty and future research needs.
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Affiliation(s)
- Naomi F Walker
- Infectious Diseases & Immunity, Imperial College London, W12 0NN, UK
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Diseases & Molecular Medicine, University of Cape Town, Observatory 7925, South Africa
| | - Graeme Meintjes
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Diseases & Molecular Medicine, University of Cape Town, Observatory 7925, South Africa
- Department of Medicine, Norfolk Place, Imperial College London, W2 1PG, UK
| | - Robert J Wilkinson
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Diseases & Molecular Medicine, University of Cape Town, Observatory 7925, South Africa
- Department of Medicine, Norfolk Place, Imperial College London, W2 1PG, UK
- MRC National Institute for Medical Research, London, NW7 1AA, UK
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Agarwal U, Kumar A, Behera D, French MA, Price P. Tuberculosis associated immune reconstitution inflammatory syndrome in patients infected with HIV: meningitis a potentially life threatening manifestation. AIDS Res Ther 2012; 9:17. [PMID: 22620862 PMCID: PMC3427137 DOI: 10.1186/1742-6405-9-17] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 05/08/2012] [Indexed: 11/10/2022] Open
Abstract
Background Tuberculosis (TB) is the most common co infection in HIV-infected persons in India, requiring concomitant administration of anti TB and antiretroviral therapies. Paradoxical worsening of tuberculosis after anti-retroviral therapy (ART) initiation is frequently seen. Objective To study the frequency, clinical presentation and outcome of paradoxical tuberculosis associated immune reconstitution inflammatory syndrome (TB-IRIS) in HIV infected patients in a TB hospital in North India. Design A retrospective chart review of HIV-infected TB patients on anti-tubercular treatment (ATT) at time of ART initiation over a 3 year period. Medical records were reviewed for clinical manifestations and outcome in patients who developed TB-IRIS. Results 514 HIV-infected patients were enrolled between January 2006 and December 2008. Thirteen (12.6%) of 103 patients who had received ART and ATT simultaneously developed paradoxical TB-IRIS. Clinical presentations of paradoxical TB-IRIS included new lymphadenopathy (n = 3), increase in size of existing lymphadenopathy (n = 3), worsening of existing pulmonary lesions (n = 2), appearance of new pleural effusion (n = 1) and prolonged high grade fever (n = 2). Four patients developed new tubercular meningitis as manifestation of TB-IRIS. Our cases developed TB-IRIS a median of 15 days after starting ART (IQR 15–36). TB-IRIS patients were older (> 35 years) than those with no IRIS (P = 0.03), but were not distinguishable by CD4 T-cell count, duration of ATT before ART or the outcome of TB treatment. Eight (62%) patients had a complete recovery while 5 (38%) patients with TB-IRIS died, of which majority (n = 3) had meningitis. Conclusions Paradoxical TB-IRIS is a frequent problem during concomitant ATT and ART in HIV-TB co infected patients in north India. Meningitis is a potentially life threatening manifestation of TB-IRIS.
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Mycobacterial immune restoration disease: one symphony, two or many? AIDS 2012; 26:119-20. [PMID: 21941164 DOI: 10.1097/qad.0b013e32834d4f97] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lawn SD, Meintjes G. Pathogenesis and prevention of immune reconstitution disease during antiretroviral therapy. Expert Rev Anti Infect Ther 2011; 9:415-30. [PMID: 21504399 DOI: 10.1586/eri.11.21] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The risks of unmasking and paradoxical forms of immune reconstitution disease in HIV-infected patients starting antiretroviral therapy (ART) are fuelled by a combination of the late presentation of patients with advanced immunodeficiency, the associated high rates of opportunistic infections (OIs) and the need for rapid initiation of ART to minimize overall mortality risk. We review the risk factors and our current knowledge of the immunopathogenesis of immune reconstitution disease, leading to a discussion of strategies for prevention. Initiation of ART at higher CD4 counts, use of OI-preventive therapies prior to ART eligibility, intensified screening for OIs prior to ART initiation and optimum therapy for OIs are all needed. In addition, use of a range of pharmacological agents with immunosuppressive and immunomodulatory activity is being explored.
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Affiliation(s)
- Stephen D Lawn
- The Desmond Tutu HIV Centre, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
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Oliver BG, Price P. The search for biomarkers of immune restoration disease associated with Mycobacterium tuberculosis in HIV patients beginning antiretroviral therapy. Biomark Med 2011; 5:149-54. [DOI: 10.2217/bmm.11.16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Immune restoration disease associated with Mycobacterium tuberculosis is a complication of antiretroviral therapy seen in a subset of HIV-1 patients soon after they commence antiretroviral therapy. It is characterized by a ‘paradoxical’ worsening of treated tuberculosis or an ‘unmasking’ of subclinical tuberculosis. As antiretroviral therapy becomes increasingly available in countries with a high prevalence of tuberculosis, this form of immune restoration disease will become more common. Here we summarize biomarkers that may illuminate immunopathogenesis and assist in diagnosis.
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Affiliation(s)
- Benjamin G Oliver
- School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Western Australia, Australia
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Abstract
PURPOSE OF REVIEW Immune reconstitution inflammatory syndrome (IRIS) is the paradoxical worsening or unmasking of an infection or neoplasm in HIV-1-infected patients shortly after antiretroviral therapy (ART) initiation. New insights into the pathogenesis of IRIS may help identify biomarkers that could be useful in predicting or diagnosing IRIS. RECENT FINDINGS Studies of immunopathogenesis have shown a signification activation of both innate and adaptive immune responses with elevation of plasma or serum chemokines and cytokines. Markers of inflammation such as C-reactive protein, interferon-inducible protein 10 or interferon γ may be helpful as predictors of IRIS events. In addition, tuberculosis (TB)-associated IRIS is associated with a prominent Th1 response that can be heightened even prior to ART initiation in cases of unmasking TB, and may assist in early diagnosis. Large prospective studies are needed to elucidate the predictive and diagnostic value of IRIS biomarkers and advance them to the clinic. SUMMARY Reversal of immunosuppression by ART leads to exaggerated pathogen-specific immune responses (known as IRIS) that appear to be primed prior to therapy. Inflammatory markers, chemokines and cytokines that signify innate and adaptive immune activation are biomarkers that could prove of clinical value after appropriate validation.
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Boulware DR, Meya DB, Bergemann TL, Wiesner DL, Rhein J, Musubire A, Lee SJ, Kambugu A, Janoff EN, Bohjanen PR. Clinical features and serum biomarkers in HIV immune reconstitution inflammatory syndrome after cryptococcal meningitis: a prospective cohort study. PLoS Med 2010; 7:e1000384. [PMID: 21253011 PMCID: PMC3014618 DOI: 10.1371/journal.pmed.1000384] [Citation(s) in RCA: 214] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 11/10/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Although antiretroviral therapy (ART) improves survival in persons with cryptococcal meningitis (CM) and AIDS, ART frequently elicits HIV immune reconstitution inflammatory syndrome (IRIS), an exaggerated and frequently deadly inflammatory reaction that complicates recovery from immunodeficiency. The pathogenesis of IRIS is poorly understood and prediction of IRIS is not possible. METHODS AND FINDINGS We prospectively followed 101 ART-naïve Ugandans with AIDS and recent CM for one year after initiating ART, and used Luminex multiplex assays to compare serum cytokine levels in participants who did or did not develop IRIS. IRIS occurred in 45% of participants with recent CM on ART, including 30% with central nervous system (CNS) manifestations. The median time to CM-IRIS was 8.8 wk on ART. Overall mortality on ART was 36% with IRIS and 21% without IRIS. CM-IRIS was independently associated with death (HR = 2.3, 95% CI 1.1-5.1, p = 0.04). Patients experiencing subsequent CM-IRIS had 4-fold higher median serum cryptococcal antigen (CRAG) levels pre-ART (p = 0.006). Higher pre-ART levels of interleukin (IL)-4 and IL-17 as well as lower tumor necrosis factor (TNF)-α, granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage colony-stimulating factor (GM-CSF), and vascular endothelial growth factor (VEGF) predicted future IRIS in multivariate analyses (area under the curve [AUC] = 0.82). An algorithm based on seven pre-ART serum biomarkers was a robust tool for stratifying high (83%), moderate (48%), and low risk (23%) for IRIS in the cohort. After ART was initiated, increasing levels of C-reactive protein (CRP), D-dimer, IL-6, IL-7, IL-13, G-CSF, or IL-1RA were associated with increasing hazard of IRIS by time-to-event analysis (each p≤0.001). At the time of IRIS onset, multiple proinflammatory cytokine responses were present, including CRP and IL-6. Mortality was predicted by pre-ART increasing IL-17, decreasing GM-CSF, and CRP level >32 mg/l (highest quartile). Pre-ART CRP level >32 mg/l alone was associated with future death (OR = 8.3, 95% CI 2.7-25.6, p<0.001). CONCLUSIONS Pre-ART increases in Th(17) and Th(2) responses (e.g., IL-17, IL-4) and lack of proinflammatory cytokine responses (e.g., TNF-α, G-CSF, GM-CSF, VEGF) predispose individuals to subsequent IRIS, perhaps as biomarkers of immune dysfunction and poor initial clearance of CRAG. Although requiring validation, these biomarkers might be an objective tool to stratify the risk of CM-IRIS and death, and could be used clinically to guide when to start ART or use prophylactic interventions.
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Affiliation(s)
- David R Boulware
- Division of Infectious Diseases & International Medicine, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.
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Worsley CM, Suchard MS, Stevens WS, Van Rie A, Murdoch DM. Multi-analyte profiling of ten cytokines in South African HIV-infected patients with Immune Reconstitution Inflammatory Syndrome (IRIS). AIDS Res Ther 2010; 7:36. [PMID: 20929543 PMCID: PMC2992027 DOI: 10.1186/1742-6405-7-36] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Accepted: 10/07/2010] [Indexed: 12/31/2022] Open
Abstract
Background Immune reconstitution inflammatory syndrome (IRIS) is an important complication of HAART in sub-Saharan Africa, where opportunistic infections (OIs) including mycobacteria and cryptococcus are common. The immune system's role in HIV infected patients is complex with cytokine expression strongly influencing HIV infection and replication. Methods We determined the expression patterns of 10 cytokines by Luminex multi-analyte profiling in 17 IRIS nested case-control pairs participating in a prospective South African cohort initiating anti-retroviral therapy. Results Interferon-gamma (IFN-γ) expression was significantly elevated in IRIS cases compared to controls (median 9.88 pg/ml versus 2.68 pg/ml, respectively, P = 0.0057), while other cytokines displayed non-significant differences in expression. Significant correlation was observed between IL-6, IL-10, and IFN-γ expression in the IRIS patients. Conclusions Significantly increased expression levels of IFN-γ suggest that this cytokine possibly plays a role in IRIS pathology and is a potential diagnostic marker.
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