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Dos Santos Guedes MC, Carvalho-Silva WHV, Andrade-Santos JL, Brelaz-de-Castro MCA, Souto FO, Guimarães RL. Thymic Exhaustion and Increased Immune Activation Are the Main Mechanisms Involved in Impaired Immunological Recovery of HIV-Positive Patients under ART. Viruses 2023; 15. [PMID: 36851655 DOI: 10.3390/v15020440] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/22/2023] [Accepted: 02/03/2023] [Indexed: 02/08/2023] Open
Abstract
Decades of studies in antiretroviral therapy (ART) have passed, and the mechanisms that determine impaired immunological recovery in HIV-positive patients receiving ART have not been completely elucidated yet. Thus, T-lymphocytes immunophenotyping and cytokines levels were analyzed in 44 ART-treated HIV-positive patients who had a prolonged undetectable plasma viral load. The patients were classified as immunological non-responders (INR = 13) and immunological responders (IR = 31), according to their CD4+ T cell levels. Evaluating pre-CD4+ levels, we observed a statistically significant trend between lower CD4+ T cell levels and INR status (Z = 3.486, p < 0.001), and during 18 months of ART, the CD4+ T cell levels maintained statistical differences between the INR and IR groups (WTS = 37.252, p < 0.001). Furthermore, the INRs were associated with an elevated age at ART start; a lower pre-treatment CD4+ T cell count and a percentage that remained low even after 18 months of ART; lower levels of recent thymic emigrant (RTE) CD4+ T cell (CD45RA + CD31+) and a naïve CD4+ T cell (CD45RA + CD62L+); higher levels of central memory CD4+ T cells (CD45RA-CD62L+); and higher immune activation by CD4+ expressing HLA-DR+ or both (HLA-DR+ and CD38+) when compared with IRs. Our study demonstrates that thymic exhaustion and increased immune activation are two mechanisms substantially implicated in the impaired immune recovery of ART-treated HIV patients.
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Lao X, Mei X, Zou J, Xiao Q, Ning Q, Xu X, Zhang C, Ji L, Deng S, Lu B, Chen M. Pyroptosis associated with immune reconstruction failure in HIV-1- infected patients receiving antiretroviral therapy: a cross-sectional study. BMC Infect Dis 2022; 22:867. [PMID: 36411423 PMCID: PMC9677631 DOI: 10.1186/s12879-022-07818-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 10/27/2022] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Highly active anti-retroviral therapy (HAART) can successfully suppress human immunodeficiency virus (HIV) viral replication and reconstruct immune function reconstruction in HIV-1-infected patients. However, about 15-30% of HIV-1-infected patients still fail to recover their CD4+ T cell counts after HAART treatment, which means immune reconstruction failure. Pyroptosis plays an important role in the death of CD4+ T cells in HIV-1- infected patients. The study aims to explore the association between the expression of pyroptosis in peripheral blood and immune function reconstruction in HIV-1- infected patients. METHODS One hundred thirty-five HIV-1-infected patients including immunological non-responders (INR) group, immunological responders (IR) group and normal immune function control (NC) group were analyzed. The expression of GSDMD and Caspase-1 in peripheral blood of HIV-1-infected patients were measured by qPCR. The concentrations of GSDMD, Caspase-1, IL-1β and IL-18 in the peripheral serum were quantified by ELISA. The associations between the expression of pyroptosis in peripheral blood and immune function reconstruction were analyzed using multivariate logistic models. RESULTS The relative expression of GSDMD mRNA and caspase-1 mRNA in peripheral blood, as well as the expression of IL-18 cytokine in the INR, were significantly higher than those in the IR and NC (P < 0.05). There was no significant difference in the expression of IL-1β cytokine (P > 0.05). Multivariate logistic analysis showed that the patients with baseline CD4+ T cell counts less than 100 cells/μL (aOR 7.051, 95% CI 1.115-44.592, P = 0.038), high level of expression of Caspase-1mRNA (aOR 2.803, 95% CI 1.065-7.377, P = 0.037) and IL-18 cytokine (aOR 10.131, 95% CI 1.616-63.505, P = 0.013) had significant poor CD4+ T cell recovery. CONCLUSIONS The baseline CD4+ T cell counts less than 100 cells/μL, high relative expression of Caspase-1 mRNA, and high expression of IL-18 cytokine are associated factors that affect the reconstruction of immune function.
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Affiliation(s)
- Xiaojie Lao
- grid.413996.00000 0004 0369 5549Department of Infectious Diseases, Beijing Ditan Hospital Capital Medical University, Beijing, 100015 China ,Guangxi Key Laboratory of AlDS Prevention and Treatment, Nanning, 530021 China ,grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Guangxi Medical University First Affiliated Hospital, Nanning, 530021 China
| | - Xinyin Mei
- Guangxi Key Laboratory of AlDS Prevention and Treatment, Nanning, 530021 China ,grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Guangxi Medical University First Affiliated Hospital, Nanning, 530021 China
| | - Jun Zou
- AIDS Clinical Treatment Center, The Fourth People’s Hospital of Nanning, Nanning, 530023 China
| | - Qing Xiao
- grid.413996.00000 0004 0369 5549Department of Infectious Diseases, Beijing Ditan Hospital Capital Medical University, Beijing, 100015 China
| | - Qiuyue Ning
- Guangxi Key Laboratory of AlDS Prevention and Treatment, Nanning, 530021 China ,grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Guangxi Medical University First Affiliated Hospital, Nanning, 530021 China
| | - Xianli Xu
- grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Wuming Hospital of Guangxi Medical University, Nanning, 530100 China
| | - Chunlan Zhang
- grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Wuming Hospital of Guangxi Medical University, Nanning, 530100 China
| | - Lei Ji
- Guangxi Key Laboratory of AlDS Prevention and Treatment, Nanning, 530021 China ,grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Wuming Hospital of Guangxi Medical University, Nanning, 530100 China
| | - Shengwei Deng
- grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Wuming Hospital of Guangxi Medical University, Nanning, 530100 China
| | - Bingyang Lu
- Department of Infectious Diseases, Mashan People’s Hospital, Nanning, 530600 China
| | - Maowei Chen
- grid.256607.00000 0004 1798 2653Department of Infectious Diseases, Wuming Hospital of Guangxi Medical University, Nanning, 530100 China
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Wang ZJ, Yu SM, Gao JM, Zhang P, Hide G, Yamamoto M, Lai DH, Lun ZR. High resistance to Toxoplasma gondii infection in inducible nitric oxide synthase knockout rats. iScience 2021; 24:103280. [PMID: 34765911 PMCID: PMC8571494 DOI: 10.1016/j.isci.2021.103280] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 03/08/2021] [Accepted: 10/13/2021] [Indexed: 11/29/2022] Open
Abstract
Nitric oxide (NO) is an important immune molecule that acts against extracellular and intracellular pathogens in most hosts. However, after the knockout of inducible nitric oxide synthase (iNOS−/−) in Sprague Dawley (SD) rats, these iNOS−/− rats were found to be completely resistant to Toxoplasma gondii infection. Once the iNOS−/− rat peritoneal macrophages (PMs) were infected with T. gondii, they produced high levels of reactive oxygen species (ROS) triggered by GRA43 secreted by T. gondii, which damaged the parasitophorous vacuole membrane and PM mitochondrial membranes within a few hours post-infection. Further evidence indicated that the high levels of ROS caused mitochondrial superoxide dismutase 2 depletion and induced PM pyroptosis and cell death. This discovery of complete resistance to T. gondii infection, in the iNOS−/−-SD rat, demonstrates a strong link between NO and ROS in immunity to T. gondii infection and showcases a potentially novel and effective backup innate immunity system. iNOS−/−-SD rats show strong resistance to Toxoplasma gondii infection iNOS−/−-SD rat PMs resist T. gondii infection through ROS upregulation The T. gondii infection results in PM pyroptosis in iNOS−/−-SD rats GRAs play a key role in the activation of resistance in iNOS−/−-SD rat PMs
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Affiliation(s)
- Zhen-Jie Wang
- Guangdong Provincial Key Laboratory of Aquatic Economic Animals, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, The People's Republic of China
| | - Shao-Meng Yu
- Guangdong Provincial Key Laboratory of Aquatic Economic Animals, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, The People's Republic of China
| | - Jiang-Mei Gao
- Department of Parasitology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, The People's Republic of China
| | - Peng Zhang
- Guangdong Provincial Key Laboratory of Aquatic Economic Animals, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, The People's Republic of China
| | - Geoff Hide
- Biomedical Research Centre, School of Science, Engineering and Environment, University of Salford, Salford M5 4WT, UK
| | - Masahiro Yamamoto
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - De-Hua Lai
- Guangdong Provincial Key Laboratory of Aquatic Economic Animals, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, The People's Republic of China
| | - Zhao-Rong Lun
- Guangdong Provincial Key Laboratory of Aquatic Economic Animals, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, The People's Republic of China.,Department of Parasitology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, The People's Republic of China.,Biomedical Research Centre, School of Science, Engineering and Environment, University of Salford, Salford M5 4WT, UK
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Andrade-Santos JL, Carvalho-Silva WHV, Coelho AVC, Souto FO, Crovella S, Brandão LAC, Guimarães RL. IL18 gene polymorphism and its influence on CD4+ T-cell recovery in HIV-positive patients receiving antiretroviral therapy. Infect Genet Evol 2019; 75:103997. [PMID: 31401307 DOI: 10.1016/j.meegid.2019.103997] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/27/2019] [Accepted: 08/06/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Pyroptosis has been reported to be critical in human immunodeficiency virus type 1 (HIV-1) pathogenesis and acquired immunodeficiency syndrome (AIDS) progression. Even after achieving viral suppression to undetectable levels during antiretroviral therapy (ART), exacerbated CD4+ T-cell death by pyroptosis has been suggested as one of the main causes of immunological non-response. Thus, variants in genes of pyroptosis pathway were studied in individuals with poor CD4+ T-cell reconstitution under antiretroviral therapy against HIV-1. METHODS 248 virologically suppressed ART-treated patients, 126 immunological non-responders (INR) and 122 immunological responders (IR) were recruited. Genotyping was performed using TaqMan probe-based realtime PCR platform. Genotype-guided flow cytometry analysis with general and recent thymic emigrant (RTE) CD4+ T-cells in pyroptosis was performed based on associated polymorphisms. RESULTS Both IL18 rs187238 G allele and GG genotype were associated as protection factors against poor CD4+ T-cell recovery (OR = 0.22; 95%CI = 0.50-0.77; P = .010 and OR = 0.58; 95%CI = 0.36-0.93; P = .022, respectively). It was demonstrated a statistical association between IL18 rs187238 genotypes of ART-treated patients and death by Caspase-1 levels (P = .020). The GG genotype showed lower pyroptotic RTE CD4+ T-lymphocytes levels in the ART-treated groups comparing with CC (P = .029) and CG (P = .018) genotypes, suggesting that the G allele presence may be related to a lower IL-18 production and thus reduced dead CD4+ T-cells levels by Caspase-1. CONCLUSION We observed that IL18 G variant allele and genotype were associated with a better immunological response, which may influence on immunological recovery of HIV-positive patients receiving antiretroviral therapy, and low Caspase-1 activity levels was observed on GG genotype when compared CC genotypes.
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Affiliation(s)
- José Leandro Andrade-Santos
- Department of Genetics, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil.
| | | | - Antonio Victor Campos Coelho
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
| | - Fabrício Oliveira Souto
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
| | - Sergio Crovella
- Department of Genetics, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
| | - Lucas André Cavalcanti Brandão
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Department of Pathology, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
| | - Rafael Lima Guimarães
- Department of Genetics, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
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Abstract
The roles of ergosterol in the regulation of membrane fluidity and structure, as well its role as a target for the activity of antifungals, have been known for decades. Two recent studies, however, demonstrated that ergosterol is an immunologically active lipid that induces pyroptosis and that virtually all steps of its biosynthetic process are potential drug targets. The roles of ergosterol in the regulation of membrane fluidity and structure, as well its role as a target for the activity of antifungals, have been known for decades. Two recent studies, however, demonstrated that ergosterol is an immunologically active lipid that induces pyroptosis and that virtually all steps of its biosynthetic process are potential drug targets. In combination, those two reports strongly indicate that the biological relevance of ergosterol is broader than the current literature suggests.
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Bierschenk D, Boucher D, Schroder K. Salmonella- induced inflammasome activation in humans. Mol Immunol 2017; 86:38-43. [DOI: 10.1016/j.molimm.2016.11.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 11/01/2016] [Accepted: 11/17/2016] [Indexed: 12/21/2022]
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Luehong N, Khaowmek J, Wongsawan K, Chuammitri P. Preferential pattern of mouse neutrophil cell death in response to various stimulants. In Vitro Cell Dev Biol Anim 2017; 53:513-524. [DOI: 10.1007/s11626-016-0129-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Accepted: 12/23/2016] [Indexed: 12/23/2022]
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