1
|
Abstract
Mycobacterium tuberculosis (Mtb) is the causative agent of tuberculosis, an infectious disease with one of the highest morbidity and mortality rates worldwide. Leveraging its highly evolved repertoire of non-protein and protein virulence factors, Mtb invades through the airway, subverts host immunity, establishes its survival niche, and ultimately escapes in the setting of active disease to initiate another round of infection in a naive host. In this review, we will provide a concise synopsis of the infectious life cycle of Mtb and its clinical and epidemiologic significance. We will also take stock of its virulence factors and pathogenic mechanisms that modulate host immunity and facilitate its spread. Developing a greater understanding of the interface between Mtb virulence factors and host defences will enable progress toward improved vaccines and therapeutics to prevent and treat tuberculosis.
Collapse
Affiliation(s)
- Kathryn C. Rahlwes
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Beatriz R.S. Dias
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Priscila C. Campos
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Samuel Alvarez-Arguedas
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Michael U. Shiloh
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA,Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA,CONTACT Michael U. Shiloh
| |
Collapse
|
2
|
Campos PC, Cunha DT, Souza-Costa LP, Shiloh MU, Franco LH. Bag it, tag it: ubiquitin ligases and host resistance to Mycobacterium tuberculosis. Trends Microbiol 2022; 30:973-985. [PMID: 35491351 PMCID: PMC9474620 DOI: 10.1016/j.tim.2022.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/26/2022] [Accepted: 03/29/2022] [Indexed: 11/29/2022]
Abstract
Infection with Mycobacterium tuberculosis (Mtb), the etiological agent of tuberculosis (TB), remains a significant global epidemic. Host resistance to Mtb depends on both adaptive and innate immunity mechanisms, including development of antigen-specific CD4 and CD8 T cells, production of inflammatory cytokines, bacterial phagocytosis and destruction within phagolysosomes, host cell apoptosis, and autophagy. A key regulatory mechanism in innate immunity is the attachment of the small protein ubiquitin to protein and lipid targets by the enzymatic activity of ubiquitin ligases. Here, we summarize the latest advances on the role of ubiquitination and ubiquitin ligases in host immunity against Mtb, with a focus on innate immunity signaling, inflammation, and antimicrobial autophagy. Understanding how ubiquitin ligases mediate immunity to Mtb, and the specific substrates of distinct ubiquitin ligases in the context of Mtb infection, could facilitate development of new host-directed antimicrobials.
Collapse
Affiliation(s)
- Priscila C Campos
- Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-9113, USA
| | - Danielle T Cunha
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Luiz P Souza-Costa
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Michael U Shiloh
- Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-9113, USA; Department of Microbiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-9113, USA.
| | - Luis H Franco
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil.
| |
Collapse
|
3
|
Tana FL, Guimarães ES, Cerqueira DM, Campos PC, Gomes MTR, Marinho FV, Oliveira SC. Galectin-3 regulates proinflammatory cytokine function and favours Brucella abortus chronic replication in macrophages and mice. Cell Microbiol 2021; 23:e13375. [PMID: 34169616 DOI: 10.1111/cmi.13375] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 06/18/2021] [Accepted: 06/21/2021] [Indexed: 01/18/2023]
Abstract
In this study, we provide evidence that galectin-3 (Gal-3) plays an important role in Brucella abortus infection. Our results showed increased Gal-3 expression and secretion in B. abortus infected macrophages and mice. Additionally, our findings indicate that Gal-3 is dispensable for Brucella-containing vacuoles disruption, inflammasome activation and pyroptosis. On the other hand, we observed that Brucella-induced Gal-3 expression is crucial for induction of molecules associated to type I IFN signalling pathway, such as IFN-β: Interferon beta (IFN-β), C-X-C motif chemokine ligand 10 (CXCL10) and guanylate-binding proteins. Gal-3 KO macrophages showed reduced bacterial numbers compared to wild-type cells, suggesting that Gal-3 facilitates bacterial replication in vitro. Moreover, priming Gal-3 KO cells with IFN-β favoured B. abortus survival in macrophages. Additionally, we also observed that Gal-3 KO mice are more resistant to B. abortus infection and these animals showed elevated production of proinflammatory cytokines when compared to control mice. Finally, we observed an increased recruitment of macrophages, dendritic cells and neutrophils in spleens of Gal-3 KO mice compared to wild-type animals. In conclusion, this study demonstrated that Brucella-induced Gal-3 is detrimental to host and this molecule is implicated in inhibition of recruitment and activation of immune cells, which promotes B. abortus spread and aggravates the infection. TAKE AWAYS: Brucella abortus infection upregulates galectin-3 expression Galectin-3 regulates guanylate-binding proteins expression but is not required for Brucella-containing vacuole disruption Galectin-3 modulates proinflammatory cytokine production during bacterial infection Galectin-3 favours Brucella replication.
Collapse
Affiliation(s)
- Fernanda L Tana
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Erika S Guimarães
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Daiane M Cerqueira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Priscila C Campos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marco Túlio R Gomes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fábio V Marinho
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Sergio C Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), CNPq MCT, Salvador, Brazil
| |
Collapse
|
4
|
Gomes MTR, Cerqueira DM, Guimarães ES, Campos PC, Oliveira SC. Guanylate-binding proteins at the crossroad of noncanonical inflammasome activation during bacterial infections. J Leukoc Biol 2019; 106:553-562. [PMID: 30897250 DOI: 10.1002/jlb.4mr0119-013r] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/28/2019] [Accepted: 03/10/2019] [Indexed: 12/14/2022] Open
Abstract
The immune system is armed with a broad range of receptors to detect and initiate the elimination of bacterial pathogens. Inflammasomes are molecular platforms that sense a diverse range of microbial insults to develop appropriate host response. In that context, noncanonical inflammasome arose as a sensor for Gram-negative bacteria-derived LPS leading to the control of infections. This review describes the role of caspase-11/gasdermin-D-dependent immune response against Gram-negative bacteria and presents an overview of guanylate-binding proteins (GBPs) at the interface of noncanonical inflammasome activation. Indeed, caspase-11 acts as a receptor for LPS and this interaction elicits caspase-11 autoproteolysis that is required for its optimal catalytic activity. Gasdermin-D is cleaved by activated caspase-11 generating an N-terminal domain that is inserted into the plasmatic membrane to form pores that induce pyroptosis, a cell death program involved in intracellular bacteria elimination. This mechanism also promotes IL-1β release and potassium efflux that connects caspase-11 to NLRP3 activation. Furthermore, GBPs display many features to allow LPS recognition by caspase-11, initiating the noncanonical inflammasome response prompting the immune system to control bacterial infections. In this review, we discuss the recent findings and nuances related to this mechanism and its biological functions.
Collapse
Affiliation(s)
- Marco Túlio R Gomes
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Daiane M Cerqueira
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Erika S Guimarães
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Priscila C Campos
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sergio C Oliveira
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| |
Collapse
|
5
|
Guimarães ES, Gomes MTR, Campos PC, Mansur DS, Dos Santos AA, Harms J, Splitter G, Smith JA, Barber GN, Oliveira SC. Brucella abortus Cyclic Dinucleotides Trigger STING-Dependent Unfolded Protein Response That Favors Bacterial Replication. J Immunol 2019; 202:2671-2681. [PMID: 30894428 DOI: 10.4049/jimmunol.1801233] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 02/28/2019] [Indexed: 01/13/2023]
Abstract
Brucella abortus is a facultative intracellular bacterium that causes brucellosis, a prevalent zoonosis that leads to abortion and infertility in cattle, and undulant fever, debilitating arthritis, endocarditis, and meningitis in humans. Signaling pathways triggered by B. abortus involves stimulator of IFN genes (STING), which leads to production of type I IFNs. In this study, we evaluated the pathway linking the unfolded protein response (UPR) and the endoplasmic reticulum-resident transmembrane molecule STING, during B. abortus infection. We demonstrated that B. abortus infection induces the expression of the UPR target gene BiP and XBP1 in murine macrophages through a STING-dependent pathway. Additionally, we also observed that STING activation was dependent on the bacterial second messenger cyclic dimeric GMP. Furthermore, the Brucella-induced UPR is crucial for induction of multiple molecules linked to type I IFN signaling pathway, such as IFN-β, IFN regulatory factor 1, and guanylate-binding proteins. Furthermore, IFN-β is also important for the UPR induction during B. abortus infection. Indeed, IFN-β shows a synergistic effect in inducing the IRE1 axis of the UPR. In addition, priming cells with IFN-β favors B. abortus survival in macrophages. Moreover, Brucella-induced UPR facilitates bacterial replication in vitro and in vivo. Finally, these results suggest that B. abortus-induced UPR is triggered by bacterial cyclic dimeric GMP, in a STING-dependent manner, and that this response supports bacterial replication. In summary, association of STING and IFN-β signaling pathways with Brucella-induced UPR unravels a novel link between innate immunity and endoplasmic reticulum stress that is crucial for bacterial infection outcome.
Collapse
Affiliation(s)
- Erika S Guimarães
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte 30270-901, Brazil
| | - Marco Túlio R Gomes
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte 30270-901, Brazil
| | - Priscila C Campos
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte 30270-901, Brazil
| | - Daniel S Mansur
- Departamento de Microbiologia, Imunologia e Parasitologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianopolis, Santa Catarina 88040-900, Brazil
| | - Adara A Dos Santos
- Departamento de Microbiologia, Imunologia e Parasitologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianopolis, Santa Catarina 88040-900, Brazil
| | - Jerome Harms
- Department of Pathobiological Sciences, University of Wisconsin, Madison, WI 53706
| | - Gary Splitter
- Department of Pathobiological Sciences, University of Wisconsin, Madison, WI 53706
| | - Judith A Smith
- Department of Pediatrics, University of Wisconsin, Madison, WI 53792
| | - Glen N Barber
- Department of Cell Biology, University of Miami, Miami, FL 33136; and
| | - Sergio C Oliveira
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte 30270-901, Brazil; .,Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Ministério de Ciência Tecnologia e Inovação, Salvador 40110-160, Brazil
| |
Collapse
|
6
|
Hielpos MS, Fernández AG, Falivene J, Alonso Paiva IM, Muñoz González F, Ferrero MC, Campos PC, Vieira AT, Oliveira SC, Baldi PC. IL-1R and Inflammasomes Mediate Early Pulmonary Protective Mechanisms in Respiratory Brucella Abortus Infection. Front Cell Infect Microbiol 2018; 8:391. [PMID: 30456207 PMCID: PMC6231193 DOI: 10.3389/fcimb.2018.00391] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 08/01/2018] [Accepted: 10/17/2018] [Indexed: 12/19/2022] Open
Abstract
Brucella spp. infection is frequently acquired through contaminated aerosols. The role of interleukin-1 beta (IL-1β) in the early pulmonary response to respiratory Brucella infection is unknown. As shown here, IL-1β levels in lung homogenates and bronchoalveolar lavage fluid (BALF) of mice intratracheally inoculated with B. abortus were increased at 3 and 7 days p.i. At 7 days p.i., pulmonary CFU numbers were higher in IL-1 receptor (IL-1R) knockout (KO) mice than in wild type (WT) mice. At different times p.i. CFU in lungs and BALF were higher in mice lacking some inflammasome components (caspase-1, AIM2, NLRP3) than in WT mice. At 2 days p.i. pulmonary levels of IL-1β and CXCL1 (neutrophils chemoattractant) were lower in caspase-1/11 KO mice. At day 3 p.i., neutrophils counts in BALF were lower in caspase-1/11 KO mice than in WT mice. During in vitro infections, IL-1β secretion was lower in alveolar macrophages from caspase-1/11, NLRP3 or AIM2 KO mice than in WT controls. Similarly, IL-1β production by B. abortus-infected alveolar epithelial cells was reduced by pretreatment with a specific caspase-1 inhibitor. This study shows that IL-1R, probably through IL-1β action, and the NLRP3 and AIM2 inflammasomes are involved in pulmonary innate immune protective mechanisms against respiratory B. abortus infection.
Collapse
Affiliation(s)
- M Soledad Hielpos
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral, Buenos Aires, Argentina
| | - Andrea G Fernández
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral, Buenos Aires, Argentina
| | - Juliana Falivene
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral, Buenos Aires, Argentina
| | - Iván M Alonso Paiva
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral, Buenos Aires, Argentina
| | - Florencia Muñoz González
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral, Buenos Aires, Argentina
| | - Mariana C Ferrero
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral, Buenos Aires, Argentina
| | - Priscila C Campos
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Angelica T Vieira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Sergio Costa Oliveira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Pablo C Baldi
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral, Buenos Aires, Argentina
| |
Collapse
|
7
|
Marinho FV, Benmerzoug S, Rose S, Campos PC, Marques JT, Báfica A, Barber G, Ryffel B, Oliveira SC, Quesniaux VFJ. The cGAS/STING Pathway Is Important for Dendritic Cell Activation but Is Not Essential to Induce Protective Immunity against Mycobacterium tuberculosis Infection. J Innate Immun 2018; 10:239-252. [PMID: 29791904 DOI: 10.1159/000488952] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/28/2018] [Indexed: 12/21/2022] Open
Abstract
Mycobacterium tuberculosis (Mtb) infection remains a major public health concern. The STING (stimulator of interferon genes) pathway contributes to the cytosolic surveillance of host cells. Most studies on the role of STING activation in Mtb infection have focused on macrophages. Moreover, a detailed investigation of the role of STING during Mtb infection in vivo is required. Here, we deciphered the involvement of STING in the activation of dendritic cells (DCs) and the host response to Mtb infection in vivo. In DCs, this adaptor molecule was important for Ifn-β expression and IL-12 production as well as for the surface expression of the activation markers CD40 and CD86. We also documented that Mtb DNA induces STING activation in murine fibroblasts. In vivo Mtb aerogenic infection induced the upregulation of the STING and cGAS (cyclic GMP-AMP synthase) genes, and Ifn-β pulmonary expression was dependent on both sensors. However, mice deficient for STING or cGAS presented a similar outcome to wild-type controls, with no major alterations in body weight gain, bacterial burden, or survival. Lung inflammation, proinflammatory cytokine production, and inflammatory cell recruitment were similar in STING- and cGAS-deficient mice compared to wild-type controls. In summary, although the STING pathway seems to be crucial for DC activation during Mtb infection, it is dispensable for host protection in vivo.
Collapse
Affiliation(s)
- Fabio V Marinho
- Centre National de la Recherche Scientifique (CNRS), UMR7355, Orleans, France.,Experimental and Molecular Immunology and Neurogenetics, University of Orleans, Orleans, France.,Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Conselho Nacional de Desenvolvimento Científico e Tecnológico, Ministério de Ciência Tecnologia e Inovação Salvador, Bahia, Brazil
| | - Sulayman Benmerzoug
- Centre National de la Recherche Scientifique (CNRS), UMR7355, Orleans, France.,Experimental and Molecular Immunology and Neurogenetics, University of Orleans, Orleans, France
| | - Stephanie Rose
- Centre National de la Recherche Scientifique (CNRS), UMR7355, Orleans, France.,Experimental and Molecular Immunology and Neurogenetics, University of Orleans, Orleans, France
| | - Priscila C Campos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - João T Marques
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - André Báfica
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Glen Barber
- Department of Cell Biology, University of Miami, Miami, Florida, USA
| | - Bernhard Ryffel
- Centre National de la Recherche Scientifique (CNRS), UMR7355, Orleans, France.,Experimental and Molecular Immunology and Neurogenetics, University of Orleans, Orleans, France
| | - Sergio C Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Conselho Nacional de Desenvolvimento Científico e Tecnológico, Ministério de Ciência Tecnologia e Inovação Salvador, Bahia, Brazil
| | - Valerie F J Quesniaux
- Centre National de la Recherche Scientifique (CNRS), UMR7355, Orleans, France.,Experimental and Molecular Immunology and Neurogenetics, University of Orleans, Orleans, France
| |
Collapse
|
8
|
Campos PC, Gomes MTR, Guimarães ES, Guimarães G, Oliveira SC. TLR7 and TLR3 Sense Brucella abortus RNA to Induce Proinflammatory Cytokine Production but They Are Dispensable for Host Control of Infection. Front Immunol 2017; 8:28. [PMID: 28167945 PMCID: PMC5253617 DOI: 10.3389/fimmu.2017.00028] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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: 11/16/2016] [Accepted: 01/09/2017] [Indexed: 01/18/2023] Open
Abstract
Brucella abortus is a Gram-negative, facultative intracellular bacterium that causes brucellosis, a worldwide zoonotic disease leading to undulant fever in humans and abortion in cattle. The immune response against this bacterium relies on the recognition of microbial pathogen-associated molecular patterns, such as lipoproteins, lipopolysaccharides, and DNA; however, the immunostimulatory potential of B. abortus RNA remains to be elucidated. Here, we show that dendritic cells (DCs) produce significant amounts of IL-12, IL-6, and IP-10/CXCL10, when stimulated with purified B. abortus RNA. IL-12 secretion by DCs stimulated with RNA depends on TLR7 while IL-6 depends on TLR7 and partially on TLR3. Further, only TLR7 plays a role in IL-12 production induced by B. abortus infection. Moreover, cytokine production in DCs infected with B. abortus or stimulated with bacterial RNA was reduced upon pretreatment with MAPK/NF-κB inhibitors. By confocal microscopy, we demonstrated that TLR7 is colocalized with B. abortus in LAMP-1+Brucella-containing vacuoles. Additionally, type I IFN expression and IP-10/CXCL10 secretion in DCs stimulated with bacterial RNA were dependent on TLR3 and TLR7. Our results suggest that TLR3 and TLR7 are not required to control Brucella infection in vivo, but they play an important role on sensing B. abortus RNA in vitro.
Collapse
Affiliation(s)
- Priscila C Campos
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais , Belo Horizonte , Brazil
| | - Marco Túlio R Gomes
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais , Belo Horizonte , Brazil
| | - Erika S Guimarães
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais , Belo Horizonte , Brazil
| | - Gabriela Guimarães
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais , Belo Horizonte , Brazil
| | - Sergio C Oliveira
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Conselho Nacional de Desenvolvimento Científico e Tecnológico, Ministério de Ciência Tecnologia e Inovação, Salvador, Brazil
| |
Collapse
|
9
|
Silveira TN, Gomes MTR, Oliveira LS, Campos PC, Machado GG, Oliveira SC. NLRP12 negatively regulates proinflammatory cytokine production and host defense against Brucella abortus. Eur J Immunol 2016; 47:51-59. [PMID: 27800616 DOI: 10.1002/eji.201646502] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 10/06/2016] [Accepted: 10/28/2016] [Indexed: 02/05/2023]
Abstract
Brucella abortus is the causative agent of brucellosis, which causes abortion in domestic animals and undulant fever in humans. This bacterium infects and proliferates mainly in macrophages and dendritic cells, where it is recognized by pattern recognition receptors (PRRs) including Nod-like receptors (NLRs). Our group recently demonstrated the role of AIM2 and NLRP3 in Brucella recognition. Here, we investigated the participation of NLRP12 in innate immune response to B. abortus. We show that NLRP12 inhibits the early production of IL-12 by bone marrow-derived macrophages upon B. abortus infection. We also observed that NLRP12 suppresses in vitro NF-κB and MAPK signaling in response to Brucella. Moreover, we show that NLRP12 modulates caspase-1 activation and IL-1β secretion in B. abortus infected-macrophages. Furthermore, we show that mice lacking NLRP12 are more resistant in the early stages of B. abortus infection: NLRP12-/- infected-mice have reduced bacterial burdens in the spleens and increased production of IFN-γ and IL-1β compared with wild-type controls. In addition, NLRP12 deficiency leads to reduction in granuloma number and size in mouse livers. Altogether, our findings suggest that NLRP12 plays an important role in negatively regulating the early inflammatory responses against B. abortus.
Collapse
Affiliation(s)
- Tatiana N Silveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marco Túlio R Gomes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.,Programa de Pós-Graduação em Genética, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luciana S Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Priscila C Campos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gabriela G Machado
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sergio C Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| |
Collapse
|
10
|
Grazielle-Silva V, Zeb TF, Bolderson J, Campos PC, Miranda JB, Alves CL, Machado CR, McCulloch R, Teixeira SMR. Distinct Phenotypes Caused by Mutation of MSH2 in Trypanosome Insect and Mammalian Life Cycle Forms Are Associated with Parasite Adaptation to Oxidative Stress. PLoS Negl Trop Dis 2015; 9:e0003870. [PMID: 26083967 PMCID: PMC4470938 DOI: 10.1371/journal.pntd.0003870] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 06/02/2015] [Indexed: 11/19/2022] Open
Abstract
Background DNA repair mechanisms are crucial for maintenance of the genome in all organisms, including parasites where successful infection is dependent both on genomic stability and sequence variation. MSH2 is an early acting, central component of the Mismatch Repair (MMR) pathway, which is responsible for the recognition and correction of base mismatches that occur during DNA replication and recombination. In addition, recent evidence suggests that MSH2 might also play an important, but poorly understood, role in responding to oxidative damage in both African and American trypanosomes. Methodology/Principal Findings To investigate the involvement of MMR in the oxidative stress response, null mutants of MSH2 were generated in Trypanosoma brucei procyclic forms and in Trypanosoma cruzi epimastigote forms. Unexpectedly, the MSH2 null mutants showed increased resistance to H2O2 exposure when compared with wild type cells, a phenotype distinct from the previously observed increased sensitivity of T. brucei bloodstream forms MSH2 mutants. Complementation studies indicated that the increased oxidative resistance of procyclic T. brucei was due to adaptation to MSH2 loss. In both parasites, loss of MSH2 was shown to result in increased tolerance to alkylation by MNNG and increased accumulation of 8-oxo-guanine in the nuclear and mitochondrial genomes, indicating impaired MMR. In T. cruzi, loss of MSH2 also increases the parasite capacity to survive within host macrophages. Conclusions/Significance Taken together, these results indicate MSH2 displays conserved, dual roles in MMR and in the response to oxidative stress. Loss of the latter function results in life cycle dependent differences in phenotypic outcomes in T. brucei MSH2 mutants, most likely because of the greater burden of oxidative stress in the insect stage of the parasite. Trypanosoma brucei and Trypanosoma cruzi are protozoa parasites that cause sleeping sickness and Chagas disease, respectively, two neglected tropical diseases endemic in sub-Saharan Africa and Latin America. The high genetic diversity found in the T. cruzi population and the highly diverse repertoire of surface glycoprotein genes found in T. brucei are crucial factors that ensure a successful infection in their hosts. Besides responding to host immune responses, these parasites must deal with various sources of oxidative stress that can cause DNA damage. Thus, by determining the right balance between genomic stability and genetic variation, DNA repair pathways have a big impact in the ability of these parasites to maintain infection. This study is focused on the role of a DNA mismatch repair (MMR) protein named MSH2 in protecting these parasites’ DNA against oxidative assault. Using knock-out mutants, we showed that, besides acting in the MMR pathway as a key protein that recognizes and repairs base mismatches, insertions or deletions that can occur after DNA replication, MSH2 has an additional role in the oxidative stress response. Importantly, this extra role of MSH2 seems to be independent of other MMR components and dependent on the parasite developmental stage.
Collapse
Affiliation(s)
- Viviane Grazielle-Silva
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- The Wellcome Trust Center for Molecular Parasitology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Tehseen Fatima Zeb
- The Wellcome Trust Center for Molecular Parasitology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Jason Bolderson
- The Wellcome Trust Center for Molecular Parasitology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Priscila C. Campos
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Julia B. Miranda
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ceres L. Alves
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Carlos R. Machado
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Richard McCulloch
- The Wellcome Trust Center for Molecular Parasitology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
- * E-mail: (RM); (SMRT)
| | - Santuza M. R. Teixeira
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail: (RM); (SMRT)
| |
Collapse
|
11
|
Gomes MTR, Campos PC, Oliveira FS, Corsetti PP, Bortoluci KR, Cunha LD, Zamboni DS, Oliveira SC. Critical Role of ASC Inflammasomes and Bacterial Type IV Secretion System in Caspase-1 Activation and Host Innate Resistance toBrucella abortusInfection. J I 2013; 190:3629-38. [DOI: 10.4049/jimmunol.1202817] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
12
|
Gomes MTR, Campos PC, de Almeida LA, Oliveira FS, Costa MMS, Marim FM, Pereira GSM, Oliveira SC. The role of innate immune signals in immunity to Brucella abortus. Front Cell Infect Microbiol 2012; 2:130. [PMID: 23112959 PMCID: PMC3480720 DOI: 10.3389/fcimb.2012.00130] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Accepted: 10/04/2012] [Indexed: 01/18/2023] Open
Abstract
Innate immunity serves as the first line of defense against infectious agents such as intracellular bacteria. The innate immune platform includes Toll-like receptors (TLRs), retinoid acid-inducible gene-I-like receptors and other cytosolic nucleic acid sensors, nucleotide-binding and oligomerization domain-like receptors, adaptors, kinases and other signaling molecules that are required to elicit effective responses against different pathogens. Our research group has been using the Gram-negative bacteria Brucella abortus as a model of pathogen. We have demonstrated that B. abortus triggers MAPK and NF-κB signaling pathways in macrophages in a MyD88 and IRAK-4-dependent manner. Furthermore, we claimed that so far TLR9 is the most important single TLR during Brucella infection. The identification of host receptors that recognize pathogen-derived nucleic acids has revealed an essential role for nucleic acid sensing in the triggering of immunity to intracellular pathogens. Besides TLRs, herein we describe recent advances in NOD1, NOD2, and type I IFN receptors in innate immune pathways during B. abortus infection.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Sergio C. Oliveira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas GeraisBelo Horizonte, MG, Brazil
| |
Collapse
|
13
|
Campos PC, Silva VG, Furtado C, Machado-Silva A, Darocha WD, Peloso EF, Gadelha FR, Medeiros MHG, Lana GDC, Chen Y, Barnes RL, Passos-Silva DG, McCulloch R, Machado CR, Teixeira SMR. Trypanosoma cruzi MSH2: Functional analyses on different parasite strains provide evidences for a role on the oxidative stress response. Mol Biochem Parasitol 2010; 176:8-16. [PMID: 21073906 PMCID: PMC3142612 DOI: 10.1016/j.molbiopara.2010.11.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 10/24/2010] [Accepted: 11/01/2010] [Indexed: 11/29/2022]
Abstract
Components of the DNA mismatch repair (MMR) pathway are major players in processes known to generate genetic diversity, such as mutagenesis and DNA recombination. Trypanosoma cruzi, the protozoan parasite that causes Chagas disease has a highly heterogeneous population, composed of a pool of strains with distinct characteristics. Studies with a number of molecular markers identified up to six groups in the T. cruzi population, which showed distinct levels of genetic variability. To investigate the molecular basis for such differences, we analyzed the T. cruzi MSH2 gene, which encodes a key component of MMR, and showed the existence of distinct isoforms of this protein. Here we compared cell survival rates after exposure to genotoxic agents and levels of oxidative stress-induced DNA in different parasite strains. Analyses of msh2 mutants in both T. cruzi and T. brucei were also used to investigate the role of Tcmsh2 in the response to various DNA damaging agents. The results suggest that the distinct MSH2 isoforms have differences in their activity. More importantly, they also indicate that, in addition to its role in MMR, TcMSH2 acts in the parasite response to oxidative stress through a novel mitochondrial function that may be conserved in T. brucei.
Collapse
Affiliation(s)
- Priscila C Campos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Campos PC, Bartholomeu DC, DaRocha WD, Cerqueira GC, Teixeira SMR. Sequences involved in mRNA processing in Trypanosoma cruzi. Int J Parasitol 2008; 38:1383-9. [PMID: 18700146 DOI: 10.1016/j.ijpara.2008.07.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2008] [Revised: 06/27/2008] [Accepted: 07/08/2008] [Indexed: 11/25/2022]
Abstract
Gene expression in Trypanosomatids requires processing of polycistronic transcripts to generate monocistronic mRNAs by cleavage events that are coupled to the addition of a Spliced Leader sequence (SL) at the 5'-end and a poly(A) tail at the 3'-end of each mRNA. Here we investigate the sequence requirements involved in Trypanosoma cruzi mRNA processing by mapping all available expressed sequence tags and cDNAs containing poly(A) tail and/or SL to genomic intergenic regions. Amongst other parameters, we determined that the median lengths of 5' untranslated region (UTR) and 3'UTR sequences are 35 and 264 nucleotides, respectively; and that the median distance between SL addition sites and a polypyrimidine motif is 18 nucleotides, whereas the median distance between poly(A) addition sites and the closest polypyrimidine-rich sequence is 40 nucleotides.
Collapse
Affiliation(s)
- Priscila C Campos
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | | | | |
Collapse
|
15
|
Abstract
A total of 880 expressed sequence tags (EST) originated from clones randomly selected from a Trypanosoma cruzi amastigote cDNA library have been analyzed. Of these, 40% (355 ESTs) have been identified by similarity to sequences in public databases and classified according to functional categorization of their putative products. About 11% of the mRNAs expressed in amastigotes are related to the translational machinery, and a large number of them (9% of the total number of clones in the library) encode ribosomal proteins. A comparative analysis with a previous study, where clones from the same library were selected using sera from patients with Chagas disease, revealed that ribosomal proteins also represent the largest class of antigen coding genes expressed in amastigotes (54% of all immunoselected clones). However, although more than thirty classes of ribosomal proteins were identified by EST analysis, the results of the immunoscreening indicated that only a particular subset of them contains major antigenic determinants recognized by antibodies from Chagas disease patients.
Collapse
Affiliation(s)
- Gustavo C Cerqueira
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, 31270-010 Belo Horizonte, MG, Brazil
| | | | | | | | | |
Collapse
|
16
|
Campos PC, Baruzzi AC, Vieira MLC, Knobel E. Successful treatment of colon cancer related right heart thromboemboli with prolonged intravenous streptokinase during serial TOE monitoring. Heart 2005; 91:390. [PMID: 15710735 PMCID: PMC1768740 DOI: 10.1136/hrt.2004.038687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
17
|
Daysog A, Campos PC. The nephrotic syndrome among Filipinos: clinical and histologic studies with special reference to doubly refractile fat bodies in the urine. J Philipp Med Assoc 1966; 42:779-94. [PMID: 5978413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
18
|
Campos PC. Dr. Antonio G. Sison. Acta Med Philipp 1965; 2:117-8. [PMID: 5323593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|