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Akhter A, Moliva JI, Azad AK, Olmo-Fontánez A, Garcia-Vilanova A, Scordo JM, Gavrilin MA, Diaz PT, Endsley JJ, Weintraub ST, Schlesinger LS, Wewers MD, Torrelles JB. HIV infection impairs the host response to Mycobacterium tuberculosis infection by altering surfactant protein D function in the human lung alveolar mucosa. Mucosal Immunol 2024; 17:461-475. [PMID: 38184074 DOI: 10.1016/j.mucimm.2023.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/11/2023] [Accepted: 12/18/2023] [Indexed: 01/08/2024]
Abstract
Tuberculosis is the leading cause of death for people living with HIV (PLWH). We hypothesized that altered functions of innate immune components in the human alveolar lining fluid of PLWH (HIV-ALF) drive susceptibility to Mycobacterium tuberculosis (M.tb) infection. Our results indicate a significant increase in oxidation of innate proteins and chemokine levels and significantly lower levels and function of complement components and Th1/Th2/Th17 cytokines in HIV-ALF versus control-ALF (non-HIV-infected people). We further found a deficiency of surfactant protein D (SP-D) and reduced binding of SP-D to M.tb that had been exposed to HIV-ALF. Primary human macrophages infected with M.tb exposed to HIV-ALF were significantly less capable of controlling the infection, which was reversed by SP-D replenishment in HIV-ALF. Thus, based on the limited number of participants in this study, our data suggest that PLWH without antiretroviral therapy (ART) have declining host innate defense function in their lung mucosa, thereby favoring M.tb and potentially other pulmonary infections.
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Affiliation(s)
- Anwari Akhter
- Population Health Program, Texas Biomedical Research Institute, San Antonio, TX, USA.
| | - Juan I Moliva
- Population Health Program, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Abul K Azad
- Host Pathogen Interactions Program, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Angélica Olmo-Fontánez
- Population Health Program, Texas Biomedical Research Institute, San Antonio, TX, USA; Integrated Biomedical Sciences Program, University of Texas Health Science Center at San Antonio, TX, USA
| | | | - Julia M Scordo
- Population Health Program, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Mikhail A Gavrilin
- Department of Internal Medicine, Pulmonary, Critical Care and Sleep Medicine Division, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Phillip T Diaz
- Department of Internal Medicine, Pulmonary, Critical Care and Sleep Medicine Division, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Janice J Endsley
- Departments of Microbiology & Immunology and Pathology, University of Texas Medical Branch Health, Galveston, TX, USA
| | - Susan T Weintraub
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Larry S Schlesinger
- Host Pathogen Interactions Program, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Mark D Wewers
- Department of Internal Medicine, Pulmonary, Critical Care and Sleep Medicine Division, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Jordi B Torrelles
- Population Health Program, Texas Biomedical Research Institute, San Antonio, TX, USA; International Center for the Advancement of Research and Education (I•CARE), Texas Biomedical Research Institute, San Antonio, TX, USA.
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Meinshausen AK, Färber J, Illiger S, Macor P, Lohmann CH, Bertrand J. C9 immunostaining as a tissue biomarker for periprosthetic joint infection diagnosis. Front Immunol 2023; 14:1112188. [PMID: 36895567 PMCID: PMC9989178 DOI: 10.3389/fimmu.2023.1112188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 02/01/2023] [Indexed: 02/23/2023] Open
Abstract
Background Culture-negative periprosthetic joint infections (PJI) are often false diagnosed as aseptic implant failure leading to unnecessary revision surgeries due to repeated infections. A marker to increase the security of e PJI diagnosis is therefore of great importance. The aim of this study was to test C9 immunostaining of periprosthetic tissue as a novel tissue-biomarker for a more reliable identification of PJI, as well as potential cross-reactivity. Method We included 98 patients in this study undergoing septic or aseptic revision surgeries. Standard microbiological diagnosis was performed in all cases for classification of patients. Serum parameters including C-reactive protein (CRP) serum levels and white blood cell (WBC) count were included, and the periprosthetic tissue was immunostained for C9 presence. The amount of C9 tissue staining was evaluated in septic versus aseptic tissue and the amount of C9 staining was correlated with the different pathogens causing the infection. To exclude cross-reactions between C9 immunostaining and other inflammatory joint conditions, we included tissue samples of a separate cohort with rheumatoid arthritis, wear particles and chondrocalcinosis. Results The microbiological diagnosis detected PJI in 58 patients; the remaining 40 patients were classified as aseptic. Serum CRP values were significantly increased in the PJI cohort. Serum WBC was not different between septic and aseptic cases. We found a significant increase in C9 immunostaining in the PJI periprosthetic tissue. To test the predictive value of C9 as biomarker for PJI we performed a ROC analyses. According to the Youden's criteria C9 is a very good biomarker for PJI detection with a sensitivity of 89% and a specificity of 75% and an AUC of 0.84. We did not observe a correlation of C9 staining with the pathogen causing the PJI. However, we observed a cross reactivity with the inflammatory joint disease like rheumatoid arthritis and different metal wear types. In addition, we did not observe a cross reactivity with chondrocalcinosis. Conclusion Our study identifies C9 as a potential tissue-biomarker for the identification of PJI using immunohistological staining of tissue biopsies. The use of C9 staining could help to reduce the number of false negative diagnoses of PJI.
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Affiliation(s)
- Ann-Kathrin Meinshausen
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Jacqueline Färber
- Institute of Medical Microbiology, Infection Control and Prevention, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Sebastian Illiger
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Paolo Macor
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Christoph H Lohmann
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.,Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Jessica Bertrand
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.,Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
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HIV-1 Persistence and Chronic Induction of Innate Immune Responses in Macrophages. Viruses 2020; 12:v12070711. [PMID: 32630058 PMCID: PMC7412260 DOI: 10.3390/v12070711] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 06/29/2020] [Accepted: 06/29/2020] [Indexed: 12/12/2022] Open
Abstract
A hallmark of HIV-1 infection is chronic inflammation, which plays a significant role in disease pathogenesis. Acute HIV infection induces robust inflammatory responses, which are insufficient to prevent or eliminate virus in mucosal tissues. While establishment of viral set-point is coincident with downregulation of acute innate responses, systemic inflammatory responses persist during the course of chronic HIV infection. Since the introduction of combination antiviral therapy (cART), most HIV-1+ individuals can suppress viremia under detection levels for decades. However, chronic immune activation persists and has been postulated to cause HIV associated non-AIDS complications (HANA). Importantly, inflammatory cytokines and activation markers associated with macrophages are strongly and selectively correlated with the incidence of HIV-associated neurocognitive disorder (HAND), cardiovascular dysfunctions (CVD) and other HANA conditions. In this review, we discuss the roles of macrophages in facilitating viral persistence and contributing to generation of persistent inflammatory responses.
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Ishigami J, Taliercio J, I Feldman H, Srivastava A, Townsend R, L Cohen D, Horwitz E, Rao P, Charleston J, Fink JC, Ricardo AC, Sondheimer J, Chen TK, Wolf M, Isakova T, Appel LJ, Matsushita K. Inflammatory Markers and Incidence of Hospitalization With Infection in Chronic Kidney Disease. Am J Epidemiol 2020; 189:433-444. [PMID: 31673705 DOI: 10.1093/aje/kwz246] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 10/09/2019] [Accepted: 10/11/2019] [Indexed: 12/20/2022] Open
Abstract
Persons with chronic kidney disease (CKD) are at high risk of infection. While low-grade inflammation could impair immune response, it is unknown whether inflammatory markers are associated with infection risk in this clinical population. Using 2003-2013 data from the Chronic Renal Insufficiency Cohort Study (3,597 participants with CKD), we assessed the association of baseline plasma levels of 4 inflammatory markers (interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), interleukin-1 receptor antagonist (IL-1RA), and transforming growth factor-β (TGF-β)) with incident hospitalization with major infection (pneumonia, urinary tract infection, cellulitis and osteomyelitis, and bacteremia and sepsis). During follow-up (median 7.5 years), 36% (n = 1,290) had incident hospitalization with major infection. In multivariable Cox analyses with each inflammatory marker modeled as a restricted cubic spline, higher levels of IL-6 and TNF-α were monotonically associated with increased risk of hospitalization with major infection (for 95th vs. 5th percentile, hazard ratio = 2.11 (95% confidence interval: 1.68, 2.66) for IL-6 and 1.88 (95% confidence interval: 1.51, 2.33) for TNF-α), while corresponding associations for IL-1RA or TGF-β were nonsignificant. Thus, higher plasma levels of IL-6 and TNF-α, but not IL-1RA or TGF-β, were significantly associated with increased risk of hospitalization with major infection. Future studies should investigate whether inflammatory pathways that involve IL-6 and TNF-α increase susceptibility to infection among individuals with CKD.
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Cribbs SK, Crothers K, Morris A. Pathogenesis of HIV-Related Lung Disease: Immunity, Infection, and Inflammation. Physiol Rev 2019; 100:603-632. [PMID: 31600121 DOI: 10.1152/physrev.00039.2018] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Despite anti-retroviral therapy (ART), human immunodeficiency virus-1 (HIV)-related pulmonary disease continues to be a major cause of morbidity and mortality for people living with HIV (PLWH). The spectrum of lung diseases has changed from acute opportunistic infections resulting in death to chronic lung diseases for those with access to ART. Chronic immune activation and suppression can result in impairment of innate immunity and progressive loss of T cell and B cell functionality with aberrant cytokine and chemokine responses systemically as well as in the lung. HIV can be detected in the lungs of PLWH and has profound effects on cellular immune functions. In addition, HIV-related lung injury and disease can occur secondary to a number of mechanisms including altered pulmonary and systemic inflammatory pathways, viral persistence in the lung, oxidative stress with additive effects of smoke exposure, microbial translocation, and alterations in the lung and gut microbiome. Although ART has had profound effects on systemic viral suppression in HIV, the impact of ART on lung immunology still needs to be fully elucidated. Understanding of the mechanisms by which HIV-related lung diseases continue to occur is critical to the development of new preventive and therapeutic strategies to improve lung health in PLWH.
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Affiliation(s)
- Sushma K Cribbs
- Pulmonary Medicine, Department of Veterans Affairs, Atlanta, Georgia; Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep, Emory University, Atlanta, Georgia; Department of Medicine, Veterans Affairs Puget Sound Health Care System and Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington, Seattle, Washington; and Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Kristina Crothers
- Pulmonary Medicine, Department of Veterans Affairs, Atlanta, Georgia; Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep, Emory University, Atlanta, Georgia; Department of Medicine, Veterans Affairs Puget Sound Health Care System and Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington, Seattle, Washington; and Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Alison Morris
- Pulmonary Medicine, Department of Veterans Affairs, Atlanta, Georgia; Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep, Emory University, Atlanta, Georgia; Department of Medicine, Veterans Affairs Puget Sound Health Care System and Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington, Seattle, Washington; and Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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Saylor D, Kumar A, Nakigozi G, Anok A, Batte J, Kisakye A, Mayanja R, Nakasujja N, Robertson KR, Gray RH, Wawer MJ, Pardo CA, Sacktor N. Interleukin-6 is associated with mortality and neuropsychiatric outcomes in antiretroviral-naïve adults in Rakai, Uganda. J Neurovirol 2019; 25:735-740. [PMID: 31165368 DOI: 10.1007/s13365-019-00759-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 04/16/2019] [Accepted: 05/03/2019] [Indexed: 12/31/2022]
Abstract
Serum interleukin-6 (IL-6) and D-dimer have been associated with multiple adverse outcomes in HIV-infected (HIV+) individuals, but their association with neuropsychiatric outcomes, including HIV-associated neurocognitive disorder (HAND) and depression, headaches, and peripheral neuropathy have not been investigated. Three hundred ninety-nine HIV+ antiretroviral therapy (ART)-naïve adults in Rakai, Uganda, were enrolled in a longitudinal cohort study and completed a neurological evaluation, neurocognitive assessment, and venous blood draw. Half of the participants had advanced immunosuppression (CD4 count < 200 cells/μL), and half had moderate immunosuppression (CD4 count 350-500 cells/μL). All-cause mortality was determined by verbal autopsy within 2 years. HAND was determined using Frascati criteria, and depression was defined by the Center for Epidemiologic Studies-Depression (CES-D) scale. Neuropathy was defined as the presence of > 1 neuropathy symptom and > 1 neuropathy sign. Headaches were identified by self-report. Serum D-dimer levels were determined using ELISA and IL-6 levels using singleplex assays. Participants were 53% male, mean age 35 + 8 years, and mean education 5 + 3 years. Participants with advanced immunosuppression had significantly higher levels of IL-6 (p < 0.001) and a trend toward higher D-dimer levels (p = 0.06). IL-6 was higher among participants with HAND (p = 0.01), with depression (p = 0.03) and among those who died within 2 years (p = 0.001) but not those with neuropathy or headaches. D-dimer did not vary significantly by any outcome. Systemic inflammation as measured by serum IL-6 is associated with an increased risk of advanced immunosuppression, all-cause mortality, HAND, and depression but not neuropathy or headaches among ART-naïve HIV+ adults in rural Uganda.
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Affiliation(s)
- Deanna Saylor
- Department of Neurology, Johns Hopkins University School of Medicine, Meyer 6-113, 600 N. Wolfe Street, Baltimore, MD, 21287, USA. .,Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia.
| | - Anupama Kumar
- Department of Neurology, Johns Hopkins University School of Medicine, Meyer 6-113, 600 N. Wolfe Street, Baltimore, MD, 21287, USA
| | | | - Aggrey Anok
- Rakai Health Sciences Program, Kalisizo, Uganda
| | - James Batte
- Rakai Health Sciences Program, Kalisizo, Uganda
| | | | | | | | - Kevin R Robertson
- Department of Neurology, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA
| | - Ronald H Gray
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
| | - Maria J Wawer
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
| | - Carlos A Pardo
- Department of Neurology, Johns Hopkins University School of Medicine, Meyer 6-113, 600 N. Wolfe Street, Baltimore, MD, 21287, USA
| | - Ned Sacktor
- Department of Neurology, Johns Hopkins University School of Medicine, Meyer 6-113, 600 N. Wolfe Street, Baltimore, MD, 21287, USA
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Wang RJ, Moore J, Moisi D, Chang EG, Byanyima P, Kaswabuli S, Musisi E, Sanyu I, Sessolo A, Lalitha R, Worodria W, Davis JL, Crothers K, Lin J, Lederman MM, Hunt PW, Huang L. HIV infection is associated with elevated biomarkers of immune activation in Ugandan adults with pneumonia. PLoS One 2019; 14:e0216680. [PMID: 31091258 PMCID: PMC6519791 DOI: 10.1371/journal.pone.0216680] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 04/08/2019] [Indexed: 01/12/2023] Open
Abstract
INTRODUCTION Pneumonia is an important cause of morbidity and mortality in persons living with human immunodeficiency virus (HIV) infection. How immune activation differs among HIV-infected and HIV-uninfected adults with pneumonia is unknown. METHODS The Inflammation, Aging, Microbes, and Obstructive Lung Disease (I AM OLD) Cohort is a prospective cohort of adults with pneumonia in Uganda. In this cross-sectional analysis, plasma was collected at pneumonia presentation to measure the following 12 biomarkers: interleukin 6 (IL-6), soluble tumor necrosis factor receptors 1 and 2 (sTNFR-1 and sTNFR-2), high sensitivity C-reactive protein (hsCRP), fibrinogen, D-dimer, soluble CD27 (sCD27), interferon gamma-inducible protein 10 (IP-10), soluble CD14 (sCD14), soluble CD163 (sCD163), hyaluronan, and intestinal fatty acid binding protein. We asked whether biomarker levels differed between HIV-infected and HIV-uninfected participants, and whether higher levels of these biomarkers were associated with mortality. RESULTS One hundred seventy-three participants were enrolled. Fifty-three percent were HIV-infected. Eight plasma biomarkers-sTNFR-1, sTNFR-2, hsCRP, D-dimer, sCD27, IP-10, sCD14, and hyaluronan-were higher among participants with HIV infection, after adjustment for pneumonia severity. Higher levels of 8 biomarkers-IL-6, sTNFR-1, sTNFR-2, hsCRP, IP-10, sCD14, sCD163, and hyaluronan-were associated with increased 2-month mortality. CONCLUSIONS As in other clinical contexts, HIV infection is associated with a greater degree of immune activation among Ugandan adults with pneumonia. Some of these are also associated with short-term mortality. Further study is needed to explore whether these biomarkers might predict poor long-term outcomes-such as the development of obstructive lung disease-in patients with HIV who have recovered from pneumonia.
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Affiliation(s)
- Richard J. Wang
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
- * E-mail: (RW); (LH)
| | - Julia Moore
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Daniela Moisi
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Emily G. Chang
- Department of Statistics, University of California Davis, Davis, California, United States of America
| | - Patrick Byanyima
- Makerere University – University of California San Francisco Research Collaboration, Infectious Diseases Research Collaboration, Kampala, Uganda
| | - Sylvia Kaswabuli
- Makerere University – University of California San Francisco Research Collaboration, Infectious Diseases Research Collaboration, Kampala, Uganda
| | - Emmanuel Musisi
- Makerere University – University of California San Francisco Research Collaboration, Infectious Diseases Research Collaboration, Kampala, Uganda
| | - Ingvar Sanyu
- Makerere University – University of California San Francisco Research Collaboration, Infectious Diseases Research Collaboration, Kampala, Uganda
| | - Abdulwahab Sessolo
- Makerere University – University of California San Francisco Research Collaboration, Infectious Diseases Research Collaboration, Kampala, Uganda
| | - Rejani Lalitha
- Department of Internal Medicine, Makerere College of Health Sciences, Kampala, Uganda
| | - William Worodria
- Department of Internal Medicine, Makerere College of Health Sciences, Kampala, Uganda
| | - J. Lucian Davis
- Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, United States of America
| | - Kristina Crothers
- Department of Medicine, University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Jue Lin
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California, United States of America
| | - Michael M. Lederman
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Peter W. Hunt
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Laurence Huang
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
- * E-mail: (RW); (LH)
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Currier JS. Management of Long-Term Complications of HIV Disease: Focus on Cardiovascular Disease. TOPICS IN ANTIVIRAL MEDICINE 2018; 25:133-137. [PMID: 29689541 PMCID: PMC5935217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
HIV-infected individuals on effective antiretroviral therapy experience a number of non-AIDS noncommunicable diseases, such as cardiovascular disease, more frequently than uninfected individuals. Common pathways for such diseases are chronic immune activation and inflammation, including the prolonged inflammation associated with lower nadir CD4+ cell count. Prevention and treatment of non-AIDS conditions include treatment of traditional risk factors, lifestyle interventions, earlier initiation of antiretroviral therapy, and potentially therapies specifically targeting inflammation and immune activation (eg, statins). This article summarizes a presentation by Judith S. Currier, MD, at the IAS-USA continuing education program, Improving the Management of HIV Disease, held in New York, New York, in February 2017.
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Hunt PW, Lee SA, Siedner MJ. Immunologic Biomarkers, Morbidity, and Mortality in Treated HIV Infection. J Infect Dis 2017; 214 Suppl 2:S44-50. [PMID: 27625430 DOI: 10.1093/infdis/jiw275] [Citation(s) in RCA: 178] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Despite marked improvements in the modern treatment era, human immunodeficiency virus (HIV)-infected individuals, particularly those who initiated antiretroviral therapy (ART) at advanced disease stages, continue to have increased age-related morbidity and mortality, compared with the general population. Immune activation and inflammation persist despite suppressive ART and predict many of these morbidities. The goal of this review is to examine the evidence suggesting a link between the persistent inflammatory state and morbidity and mortality in this setting, to describe the impact of early ART initiation on these factors, and to highlight important unanswered questions for the field. We also advance a hypothesis to explain why some morbidities-and their root inflammatory drivers-may be prevented more than others by early ART initiation.
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Affiliation(s)
- Peter W Hunt
- Department of Medicine, University of California-San Francisco
| | - Sulggi A Lee
- Department of Medicine, University of California-San Francisco
| | - Mark J Siedner
- Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston
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O'Connor J, Vjecha MJ, Phillips AN, Angus B, Cooper D, Grinsztejn B, Lopardo G, Das S, Wood R, Wilkin A, Klinker H, Kantipong P, Klingman KL, Jilich D, Herieka E, Denning E, Abubakar I, Gordin F, Lundgren JD. Effect of immediate initiation of antiretroviral therapy on risk of severe bacterial infections in HIV-positive people with CD4 cell counts of more than 500 cells per μL: secondary outcome results from a randomised controlled trial. Lancet HIV 2017; 4:e105-e112. [PMID: 28063815 PMCID: PMC5337625 DOI: 10.1016/s2352-3018(16)30216-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 10/20/2016] [Accepted: 10/28/2016] [Indexed: 12/18/2022]
Abstract
BACKGROUND The effects of antiretroviral therapy on risk of severe bacterial infections in people with high CD4 cell counts have not been well described. In this study, we aimed to quantify the effects of immediate versus deferred ART on the risk of severe bacterial infection in people with high CD4 cell counts in a preplanned analysis of the START trial. METHODS The START trial was a randomised controlled trial in ART-naive HIV-positive patients with CD4 cell count of more than 500 cells per μL assigned to immediate ART or deferral until their CD4 cell counts were lower than 350 cells per μL. We used Cox proportional hazards regression to model time to severe bacterial infection, which was defined as a composite endpoint of bacterial pneumonia (confirmed by the endpoint review committee), pulmonary or extrapulmonary tuberculosis, or any bacterial infectious disorder of grade 4 severity, that required unscheduled hospital admissions, or caused death. This study is registered with ClinicalTrials.gov, number NCT00867048. FINDINGS Patients were recruited from April 15, 2009, to Dec 23, 2013. The data cutoff for follow-up was May 26, 2015. Of 4685 HIV-positive people enrolled, 120 had severe bacterial infections (immediate-initiation group n=34, deferred-initiation group n=86; median 2·8 years of follow-up). Immediate ART was associated with a reduced risk of severe bacterial infection compared with deferred ART (hazard ratio [HR] 0·39, 95% CI 0·26-0·57, p<0·0001). In the immediate-initiation group, average neutrophil count over follow-up was 321 cells per μL higher, and average CD4 cell count 194 cells per μL higher than the deferred-initiation group (p<0·0001). In univariable analysis, higher time-updated CD4 cell count (0·78, 0·71-0·85, p=0·0001) was associated with reduced risk of severe bacterial infection. Time-updated neutrophil count was not associated with severe bacterial infection. After adjustment for time-updated factors in multivariable analysis, particularly the CD4 cell count, the HR for immediate-initiation group moved closer to 1 (HR 0·84, 0·50-1·41, p=0·52). These results were consistent when subgroups of the severe bacterial infection composite were analysed separately. INTERPRETATION Immediate ART reduces the risk of several severe bacterial infections in HIV-positive people with high CD4 cell count. This is partly explained by ART-induced increases in CD4 cell count, but not by increases in neutrophil count. FUNDING National Institute of Allergy and Infectious Diseases National Institutes of Health, Agence Nationale de Recherches sur le SIDA et les Hépatites Virales, Bundesministerium für Bildung und Forschung, European AIDS Treatment Network, Australian National Health and Medical Research Council, UK National Institute for Health Research and Medical Research Council, Danish National Research Foundation.
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Affiliation(s)
- Jemma O'Connor
- Research Department of Infection and Population Health, University College London, London, UK
| | | | - Andrew N Phillips
- Research Department of Infection and Population Health, University College London, London, UK.
| | - Brian Angus
- Oxford Centre for Clinical Tropical Medicine, Nuffield Department of Medicine, Oxford University, Oxford, UK
| | - David Cooper
- The Kirby Institute, University of New South Wales, Sydney, NSW, Australia
| | - Beatriz Grinsztejn
- STD and AIDS Clinical Research Laboratory, Evandro Chagas Clinical Research Institute (IPEC), Rio de Janeiro, Brazil
| | - Gustavo Lopardo
- Fundación Centro de Estudios Infectológicos, Buenos Aires, Argentina
| | - Satyajit Das
- HIV and GU Medicine, Coventry and Warwickshire Partnership Trust, University of Warwick, Coventry, UK
| | - Robin Wood
- Desmond Tutu HIV Centre, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - Aimee Wilkin
- Section on Infectious Diseases, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Hartwig Klinker
- University of Würzburg Medical Center, Department of Internal Medicine II, Würzburg, Germany
| | | | - Karin L Klingman
- Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - David Jilich
- Department of Infectious and Tropical Diseases, First Faculty of Medicine, Charles University and Na Bulovce Hospital, Prague, Czech Republic
| | | | - Eileen Denning
- Division of Biostatistics, University of Minnesota, Minneapolis, MN, USA
| | - Ibrahim Abubakar
- Institute for Global Health, University College London, London, UK
| | - Fred Gordin
- Veterans Affairs Medical Center, Washington, DC, USA; The George Washington University, Washington, DC, USA
| | - Jens D Lundgren
- Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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Kapasi AJ, Dittrich S, González IJ, Rodwell TC. Host Biomarkers for Distinguishing Bacterial from Non-Bacterial Causes of Acute Febrile Illness: A Comprehensive Review. PLoS One 2016; 11:e0160278. [PMID: 27486746 PMCID: PMC4972355 DOI: 10.1371/journal.pone.0160278] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 07/15/2016] [Indexed: 12/17/2022] Open
Abstract
Background In resource limited settings acute febrile illnesses are often treated empirically due to a lack of reliable, rapid point-of-care diagnostics. This contributes to the indiscriminate use of antimicrobial drugs and poor treatment outcomes. The aim of this comprehensive review was to summarize the diagnostic performance of host biomarkers capable of differentiating bacterial from non-bacterial infections to guide the use of antibiotics. Methods Online databases of published literature were searched from January 2010 through April 2015. English language studies that evaluated the performance of one or more host biomarker in differentiating bacterial from non-bacterial infection in patients were included. Key information extracted included author information, study methods, population, pathogens, clinical information, and biomarker performance data. Study quality was assessed using a combination of validated criteria from the QUADAS and Lijmer checklists. Biomarkers were categorized as hematologic factors, inflammatory molecules, cytokines, cell surface or metabolic markers, other host biomarkers, host transcripts, clinical biometrics, and combinations of markers. Findings Of the 193 citations identified, 59 studies that evaluated over 112 host biomarkers were selected. Most studies involved patient populations from high-income countries, while 19% involved populations from low- and middle-income countries. The most frequently evaluated host biomarkers were C-reactive protein (61%), white blood cell count (44%) and procalcitonin (34%). Study quality scores ranged from 23.1% to 92.3%. There were 9 high performance host biomarkers or combinations, with sensitivity and specificity of ≥85% or either sensitivity or specificity was reported to be 100%. Five host biomarkers were considered weak markers as they lacked statistically significant performance in discriminating between bacterial and non-bacterial infections. Discussion This manuscript provides a summary of host biomarkers to differentiate bacterial from non-bacterial infections in patients with acute febrile illness. Findings provide a basis for prioritizing efforts for further research, assay development and eventual commercialization of rapid point-of-care tests to guide use of antimicrobials. This review also highlights gaps in current knowledge that should be addressed to further improve management of febrile patients.
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Affiliation(s)
- Anokhi J. Kapasi
- Foundation for Innovative New Diagnostics (FIND), Campus Biotech Building B2 Level 0, 9 Chemin des Mines, 1202, Geneva, Switzerland
| | - Sabine Dittrich
- Foundation for Innovative New Diagnostics (FIND), Campus Biotech Building B2 Level 0, 9 Chemin des Mines, 1202, Geneva, Switzerland
| | - Iveth J. González
- Foundation for Innovative New Diagnostics (FIND), Campus Biotech Building B2 Level 0, 9 Chemin des Mines, 1202, Geneva, Switzerland
| | - Timothy C. Rodwell
- Foundation for Innovative New Diagnostics (FIND), Campus Biotech Building B2 Level 0, 9 Chemin des Mines, 1202, Geneva, Switzerland
- * E-mail:
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12
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Keynan Y, Rueda ZV, Aguilar Y, Trajtman A, Vélez LA. Unique cytokine and chemokine patterns in bronchoalveolar lavage are associated with specific causative pathogen among HIV infected patients with pneumonia, in Medellin, Colombia. Cytokine 2015; 73:295-301. [PMID: 25837522 DOI: 10.1016/j.cyto.2015.03.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 03/03/2015] [Accepted: 03/05/2015] [Indexed: 12/23/2022]
Abstract
We wanted to investigate the pro-inflammatory cytokine/chemokine profile associated with the etiological agents identified in HIV patients. Immunosuppressed patients admitted to two hospitals in Medellin, Colombia, with clinical and radiographic diagnosis of pneumonia were enrolled in the study. After consent, bronchoalveolar lavage (BAL) was collected for bacterial, mycobacterial and fungal diagnosis. All patients were followed for a year. A stored BAL sample was used for cytokine/chemokine detection and measurement using commercial, magnetic human cytokine bead-based 19-plex assays. Statistical analysis was performed by assigning cytokine/chemokine concentrations levels into <25 percentile (lower), 25-75 percentile (normal) and >75 percentile (higher). Principal component analysis (PCA) and Kruskal-Wallis analysis were conducted to identify the clustering of cytokines with the various infectious etiologies (fungi, Mycobacterium tuberculosis - MTB, and bacteria). Average age of patients was 35, of whom 77% were male, and the median CD4 count of 33cells/μl. Of the 57 HIV infected patients, in-hospital mortality was 12.3% and 33% died within a year of follow up. The PCA revealed increased IL-10, IL-12, IL-13, IL-17, Eotaxin, GCSF, MIP-1α, and MIP-1β concentrations to be associated with MTB infection. In patients with proven fungal infection, low concentrations of IL-1RA, IL-8, TNF-α and VEGF were identified. Bacterial infections displayed a distinct cytokine pattern and were not misclassified using the MTB or fungi cytokine patterns (p-value<0.0001). Our results indicate a unique pattern of pro-inflammatory cytokine/chemokine, allowing differentiation between bacterial and non-bacterial pathogens. Moreover, we found distinct, if imperfectly discriminatory, cytokine/chemokine patterns associated with MTB and fungal infections.
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Affiliation(s)
- Yoav Keynan
- Department of Medical Microbiology, University of Manitoba, Winnipeg, Canada.
| | - Zulma V Rueda
- Facultad de Medicina, Universidad Pontificia Bolivariana, Medellin, Colombia
| | - Yudy Aguilar
- Grupo Investigador de Problemas en Enfermedades Infecciosas, Universidad de Antioquia UdeA, Medellin, Colombia
| | - Adriana Trajtman
- Department of Medical Microbiology, University of Manitoba, Winnipeg, Canada
| | - Lázaro A Vélez
- Grupo Investigador de Problemas en Enfermedades Infecciosas, Universidad de Antioquia UdeA, Medellin, Colombia; Hospital Universitario San Vicente Fundación, Medellin, Colombia
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Abstract
PURPOSE OF REVIEW It is now widely accepted that HIV-infected individuals remain at a higher risk for mortality and age-related morbidities than the general population, but several unresolved issues need to be addressed by the research community in the coming years to further improve the health of HIV-infected individuals in the modern treatment era. RECENT FINDINGS Although recent studies have helped to better define the contribution of HIV to life expectancy and morbidity in the modern antiretroviral therapy (ART) era, questions remain about the generalizability of these findings to a future HIV-infected population that is expected to be much older. Furthermore, although a consensus has emerged that the persistent inflammatory state contributes to morbidity and mortality in this setting, the relative contributions of this process, health-related behaviours, comorbidities and medication toxicities remain incompletely understood. Lastly, significant uncertainty remains over the root causes of the persistent inflammatory state, the specific immunologic pathways to target with interventions and the most appropriate biomarkers to use for surrogate outcomes in pilot trials of immune-based interventions. SUMMARY Each of these issues will be addressed in this review, highlighting recently published and presented studies that inform the discussion, and recommendations will be made for prioritizing the future research agenda.
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Huson MAM, Grobusch MP, van der Poll T. The effect of HIV infection on the host response to bacterial sepsis. THE LANCET. INFECTIOUS DISEASES 2014; 15:95-108. [PMID: 25459220 DOI: 10.1016/s1473-3099(14)70917-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Bacterial sepsis is an important cause of morbidity and mortality in patients with HIV. HIV causes increased susceptibility to invasive infections and affects sepsis pathogenesis caused by pre-existing activation and exhaustion of the immune system. We review the effect of HIV on different components of immune responses implicated in bacterial sepsis, and possible mechanisms underlying the increased risk of invasive bacterial infections. We focus on pattern recognition receptors and innate cellular responses, cytokines, lymphocytes, coagulation, and the complement system. A combination of factors causes increased susceptibility to infection and can contribute to a disturbed immune response during a septic event in patients with HIV. HIV-induced perturbations of the immune system depend on stage of infection and are only in part restored by combination antiretroviral therapy. Immunomodulatory treatments currently under development for sepsis might be particularly beneficial to patients with HIV co-infection because many pathogenic mechanisms in HIV and sepsis overlap.
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Affiliation(s)
- Michaëla A M Huson
- Division of Infectious Diseases, Centre of Experimental and Molecular Medicine, University of Amsterdam, Amsterdam, Netherlands.
| | - Martin P Grobusch
- Division of Infectious Diseases, Centre of Tropical Medicine and Travel Medicine, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Tom van der Poll
- Division of Infectious Diseases, Centre of Experimental and Molecular Medicine, University of Amsterdam, Amsterdam, Netherlands
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Abstract
PURPOSE OF REVIEW The pulmonary complications of chronic HIV infection have shifted from infectious complications toward noninfectious pulmonary complications, predominantly chronic obstructive pulmonary disease (COPD). Although the best-established COPD risk factor is cigarette smoking, emerging data suggest that HIV infection also independently increases COPD risk. The purpose of this article is to review these data and the conflicting data regarding the role of antiretroviral therapy (ART) in modifying COPD risk. RECENT FINDINGS Observational studies favor HIV as an independent risk factor for COPD, particularly when viral load is high. The mechanisms underlying these associations are unclear, but untreated HIV infection is associated with pulmonary inflammatory responses similar to those seen in non-HIV COPD. ART reduces this pulmonary inflammation, but the clinical benefit of such reduction is unknown. Some observational studies suggest that ART users are at lower risk of COPD, whereas other studies suggest the opposite scenario. SUMMARY The effect of ART in causing COPD or reducing COPD risk is unknown, but is currently being tested in a randomized trial. Smoking cessation should remain of high priority.
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Affiliation(s)
- Ken M Kunisaki
- aSection of Pulmonary, Critical Care, and Sleep Apnea, Minneapolis Veterans Affairs Healthcare System bDivision of Pulmonary, Allergy, Critical Care and Sleep Medicine, University of Minnesota, Minneapolis, Minnesota, USA
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Wang HE, Shapiro NI, Safford MM, Griffin R, Judd S, Rodgers JB, Warnock DG, Cushman M, Howard G. High-sensitivity C-reactive protein and risk of sepsis. PLoS One 2013; 8:e69232. [PMID: 23935961 PMCID: PMC3720576 DOI: 10.1371/journal.pone.0069232] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 06/06/2013] [Indexed: 01/20/2023] Open
Abstract
Background Conventional C-reactive protein assays have been used to detect or guide the treatment of acute sepsis. The objective of this study was to determine the association between elevated baseline high-sensitivity C-reactive protein (hsCRP) and the risk of future sepsis events. Methods We studied data from 30,239 community dwelling, black and white individuals, age ≥45 years old enrolled in the REasons for Geographic and Racial Differences in Stroke (REGARDS) cohort. Baseline hsCRP and participant characteristics were determined at the start of the study. We identified sepsis events through review of hospital records. Elevated hsCRP was defined as values >3.0 mg/L. Using Cox regression, we determined the association between elevated hsCRP and first sepsis event, adjusting for sociodemographic factors (age, sex, race, region, education, income), health behaviors (tobacco and alcohol use), chronic medical conditions (coronary artery disease, diabetes, dyslipidemia, hypertension, chronic kidney disease, chronic lung disease) and statin use. Results Over the mean observation time of 5.7 years (IQR 4.5–7.1), 974 individuals experienced a sepsis event, and 11,447 (37.9%) had elevated baseline hsCRP (>3.0 mg/L). Elevated baseline hsCRP was independently associated with subsequent sepsis (adjusted HR 1.56; 95% CI 1.36–1.79), adjusted for sociodemographics, health behaviors, chronic medical conditions and statin use. Conclusion Elevated baseline hsCRP was associated with increased risk of future sepsis events. hsCRP may help to identify individuals at increased risk for sepsis.
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Affiliation(s)
- Henry E Wang
- Department of Emergency Medicine, University of Alabama School of Medicine, Birmingham, Alabama, United States of America.
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Fernández-Luna Á, Gallardo L, Plaza-Carmona M, García-Unanue J, Sánchez-Sánchez J, Felipe JL, Burillo P, Ara I. Respiratory function and changes in lung epithelium biomarkers after a short-training intervention in chlorinated vs. ozone indoor pools. PLoS One 2013; 8:e68447. [PMID: 23874631 PMCID: PMC3709909 DOI: 10.1371/journal.pone.0068447] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Accepted: 05/29/2013] [Indexed: 11/18/2022] Open
Abstract
Background Swimming in indoor pools treated with combined chemical treatments (e.g. ozone) may reduce direct exposure to disinfection byproducts and thus have less negative effects on respiratory function compared to chlorinated pools. The aim of this study is to analyze the effects of a short-term training intervention on respiratory function and lung epithelial damage in adults exercising in indoor swimming pool waters treated with different disinfection methods (chlorine vs. ozone with bromine). Methods Lung permeability biomakers [surfactant protein D (SP-D) and Clara cell secretory protein (CC16) in plasma] and forced expiratory volumes and flow (FEV1, FVC and FEF25–75) were measured in 39 healthy adults. Thirteen participants swam during 20 sessions in a chlorinated pool (CP), 13 performed and equivolumic intervention in an ozone pool (OP) and 13 were included in a control group (CG) without exposition. Results Median plasma CC16 levels increased in CP swimmers (4.27±3.29 and 6.62±5.51 µg/L, p = 0.01, pre and post intervention respectively) while no significant changes in OP and CG participants were found. No significant changes in median plasma SP-D levels were found in any of the groups after the training period. FVC increased in OP (4.26±0.86 and 4.43±0.92 L, p<0.01) and CP swimmers (4.25±0.86 and 4.35±0.85 L, p<0.01). FEV1 only increased in OP swimmers (3.50±0.65 and 3.59±0.67, p = 0.02) and FEF25–75 decreased in CP swimmers (3.70±0.87 and 3.37±0.67, p = 0.02). Conclusion Despite lung function being similar in both groups, a higher lung permeability in CP compared to OP swimmers was found after a short-term swimming program. Combined chemical treatments for swimming pools such as ozone seem to have less impact on lung epithelial of swimmers compared to chlorinated treated pools.
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