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Peña-Valencia K, Riaño W, Herrera-Diaz M, López L, Marín D, Gonzalez S, Agudelo-García O, Rodríguez-Sabogal IA, Vélez L, Rueda ZV, Keynan Y. Markers of Inflammation, Tissue Damage, and Fibrosis in Individuals Diagnosed with Human Immunodeficiency Virus and Pneumonia: A Cohort Study. Pathogens 2024; 13:84. [PMID: 38251391 PMCID: PMC10820350 DOI: 10.3390/pathogens13010084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 01/10/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024] Open
Abstract
Previous studies have noted that persons living with human immunodeficiency virus (HIV) experience persistent lung dysfunction after an episode of community-acquired pneumonia (CAP), although the underlying mechanisms remain unclear. We hypothesized that inflammation during pneumonia triggers increased tissue damage and accelerated pulmonary fibrosis, resulting in a gradual loss of lung function. We carried out a prospective cohort study of people diagnosed with CAP and/or HIV between 2016 and 2018 in three clinical institutions in Medellín, Colombia. Clinical data, blood samples, and pulmonary function tests (PFTs) were collected at baseline. Forty-one patients were included, divided into two groups: HIV and CAP (n = 17) and HIV alone (n = 24). We compared the concentrations of 17 molecules and PFT values between the groups. Patients with HIV and pneumonia presented elevated levels of cytokines and chemokines (IL-6, IL-8, IL-18, IL-1RA, IL-10, IP-10, MCP-1, and MIP-1β) compared to those with only HIV. A marked pulmonary dysfunction was evidenced by significant reductions in FEF25, FEF25-75, and FEV1. The correlation between these immune mediators and lung function parameters supports the connection between pneumonia-associated inflammation and end organ lung dysfunction. A low CD4 cell count (<200 cells/μL) predicted inflammation and lung dysfunction. These results underscore the need for targeted clinical approaches to mitigate the adverse impacts of CAP on lung function in this population.
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Affiliation(s)
- Katherine Peña-Valencia
- Escuela de Microbiología, Universidad de Antioquia, Medellin 050010, Colombia;
- Grupo de Investigación en Salud Pública, Facultad de Medicina, Universidad Pontificia Bolivariana, Medellin 050010, Colombia; (W.R.); (L.L.); (D.M.); (Z.V.R.)
- Grupo Bacterias & Cáncer, School of Medicine, Universidad de Antioquia, Medellin 050010, Colombia;
| | - Will Riaño
- Grupo de Investigación en Salud Pública, Facultad de Medicina, Universidad Pontificia Bolivariana, Medellin 050010, Colombia; (W.R.); (L.L.); (D.M.); (Z.V.R.)
- School of Medicine, Universidad de Antioquia, Medellin 050010, Colombia;
| | - Mariana Herrera-Diaz
- Department of Medical Microbiology and Infectious Disease, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.H.-D.); (S.G.)
| | - Lucelly López
- Grupo de Investigación en Salud Pública, Facultad de Medicina, Universidad Pontificia Bolivariana, Medellin 050010, Colombia; (W.R.); (L.L.); (D.M.); (Z.V.R.)
- School of Medicine, Universidad Pontificia Bolivariana, Medellin 050010, Colombia
| | - Diana Marín
- Grupo de Investigación en Salud Pública, Facultad de Medicina, Universidad Pontificia Bolivariana, Medellin 050010, Colombia; (W.R.); (L.L.); (D.M.); (Z.V.R.)
- School of Medicine, Universidad Pontificia Bolivariana, Medellin 050010, Colombia
| | - Sandra Gonzalez
- Department of Medical Microbiology and Infectious Disease, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.H.-D.); (S.G.)
- JC Wilt Infectious Diseases Research Center, Winnipeg, MB R3E 3L5, Canada
| | - Olga Agudelo-García
- Grupo Bacterias & Cáncer, School of Medicine, Universidad de Antioquia, Medellin 050010, Colombia;
| | - Iván Arturo Rodríguez-Sabogal
- School of Medicine, Universidad de Antioquia, Medellin 050010, Colombia;
- Infectious Diseases Section, Hospital Universitario San Vicente Fundación, Medellin 050010, Colombia;
| | - Lázaro Vélez
- Infectious Diseases Section, Hospital Universitario San Vicente Fundación, Medellin 050010, Colombia;
| | - Zulma Vanessa Rueda
- Grupo de Investigación en Salud Pública, Facultad de Medicina, Universidad Pontificia Bolivariana, Medellin 050010, Colombia; (W.R.); (L.L.); (D.M.); (Z.V.R.)
- Department of Medical Microbiology and Infectious Disease, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.H.-D.); (S.G.)
| | - Yoav Keynan
- Department of Medical Microbiology and Infectious Disease, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.H.-D.); (S.G.)
- Grupo Investigador de Problemas en Enfermedades Infecciosas-GRIPE, Facultad de Medicina, Universidad de Antioquia, Medellin 050010, Colombia
- Department of Internal Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Department of Community Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
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Boby N, Williams KM, Das A, Pahar B. Toll-like Receptor 2 Mediated Immune Regulation in Simian Immunodeficiency Virus-Infected Rhesus Macaques. Vaccines (Basel) 2023; 11:1861. [PMID: 38140264 PMCID: PMC10747659 DOI: 10.3390/vaccines11121861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
Toll-like receptors (TLRs) are crucial to the innate immune response. They regulate inflammatory reactions by initiating the production of pro-inflammatory cytokines and chemokines. TLRs also play a role in shaping the adaptive immune responses. While this protective response is important for eliminating infectious pathogens, persistent activation of TLRs may result in chronic immune activation, leading to detrimental effects. The role of TLR2 in regulating HIV-1 infection in vivo has yet to be well described. In this study, we used an SIV-infected rhesus macaque model to simulate HIV infection in humans. We evaluated the plasma of the macaques longitudinally and found a significant increase in the soluble TLR2 (sTLR2) level after SIV infection. We also observed an increase in membrane-bound TLR2 (mb-TLR2) in cytotoxic T cells, B cells, and NK cells in PBMC and NK cells in the gut after infection. Our results suggest that sTLR2 regulates the production of various cytokines and chemokines, including IL-18, IL-1RA, IL-15, IL-13, IL-9, TPO, FLT3L, and IL-17F, as well as chemokines, including IP-10, MCP-1, MCP-2, ENA-78, GRO-α, I-TAC, Fractalkine, SDF-1α, and MIP-3α. Interestingly, these cytokines and chemokines were also upregulated after the infection. The positive correlation between SIV copy number and sTLR2 in the plasma indicated the involvement of TLR2 in the regulation of viral replication. These cytokines and chemokines could directly or indirectly regulate viral replication through the TLR2 signaling pathways. When we stimulated PBMC with the TLR2 agonist in vitro, we observed a direct induction of various cytokines and chemokines. Some of these cytokines and chemokines, such as IL-1RA, IL-9, IL-15, GRO-α, and ENA-78, were positively correlated with sTLR2 in vivo, highlighting the direct involvement of TLR2 in the regulation of the production of these factors. Our findings suggest that TLR2 expression may be a target for developing new therapeutic strategies to combat HIV infection.
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Affiliation(s)
- Nongthombam Boby
- Division of Comparative Pathology, Tulane National Primate Research Center, Covington, LA 70433, USA; (N.B.); (K.M.W.)
| | - Kelsey M. Williams
- Division of Comparative Pathology, Tulane National Primate Research Center, Covington, LA 70433, USA; (N.B.); (K.M.W.)
| | - Arpita Das
- Division of Microbiology, Tulane National Primate Research Center, Covington, LA 70433, USA;
| | - Bapi Pahar
- Division of Comparative Pathology, Tulane National Primate Research Center, Covington, LA 70433, USA; (N.B.); (K.M.W.)
- School of Medicine, Tulane University, New Orleans, LA 70118, USA
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