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Pinheiro da Silva F, Gonçalves ANA, Duarte‐Neto AN, Dias TL, Barbeiro HV, Breda CNS, Breda LCD, Câmara NOS, Nakaya HI. Transcriptome analysis of six tissues obtained post-mortem from sepsis patients. J Cell Mol Med 2023; 27:3157-3167. [PMID: 37731199 PMCID: PMC10568675 DOI: 10.1111/jcmm.17938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 08/16/2023] [Accepted: 08/22/2023] [Indexed: 09/22/2023] Open
Abstract
Septic shock is a life-threatening clinical condition characterized by a robust immune inflammatory response to disseminated infection. Little is known about its impact on the transcriptome of distinct human tissues. To address this, we performed RNA sequencing of samples from the prefrontal cortex, hippocampus, heart, lung, kidney and colon of seven individuals who succumbed to sepsis and seven uninfected controls. We identified that the lungs and colon were the most affected organs. While gene activation dominated, strong inhibitory signals were also detected, particularly in the lungs. We found that septic shock is an extremely heterogeneous disease, not only when different individuals are investigated, but also when comparing different tissues of the same patient. However, several pathways, such as respiratory electron transport and other metabolic functions, revealed distinctive alterations, providing evidence that tissue specificity is a hallmark of sepsis. Strikingly, we found evident signals of accelerated ageing in our sepsis population.
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Affiliation(s)
| | | | | | | | - Hermes Vieira Barbeiro
- Laboratório de Emergências Clínicas, Faculdade de MedicinaUniversidade de São PauloSão PauloBrazil
| | | | | | | | - Helder I. Nakaya
- Faculdade de Ciências FarmacêuticasUniversidade de São PauloSão PauloBrazil
- Hospital Israelita Albert EinsteinSão PauloBrazil
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Breda CNDS, Breda LCD, Carvalho LADC, Amano MT, Terra FF, Silva RC, Fragas MG, Forni MF, Fonseca MTC, Venturini G, Feitosa ACM, Ghirotto B, Cruz MC, Cunha FF, Ignacio A, Latância M, Castoldi A, Andrade-Oliveira V, Martins da Silva E, Hiyane MI, Pereira ADC, Festuccia W, Meotti FC, Câmara NOS. Loss of mTORC2 Activity in Neutrophils Impairs Fusion of Granules and Affects Cellular Metabolism Favoring Increased Bacterial Burden in Sepsis. J Immunol 2021; 207:626-639. [PMID: 34261666 DOI: 10.4049/jimmunol.2000573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 05/15/2021] [Indexed: 12/23/2022]
Abstract
Sepsis is a complex infectious syndrome in which neutrophil participation is crucial for patient survival. Neutrophils quickly sense and eliminate the pathogen by using different effector mechanisms controlled by metabolic processes. The mammalian target of rapamycin (mTOR) pathway is an important route for metabolic regulation, and its role in neutrophil metabolism has not been fully understood yet, especially the importance of mTOR complex 2 (mTORC2) in the neutrophil effector functions. In this study, we observed that the loss of Rictor (mTORC2 scaffold protein) in primary mouse-derived neutrophils affects their chemotaxis by fMLF and their microbial killing capacity, but not the phagocytic capacity. We found that the microbicidal capacity was impaired in Rictor-deleted neutrophils because of an improper fusion of granules, reducing the hypochlorous acid production. The loss of Rictor also led to metabolic alterations in isolated neutrophils, increasing aerobic glycolysis. Finally, myeloid-Rictor-deleted mice (LysMRic Δ/Δ) also showed an impairment of the microbicidal capacity, increasing the bacterial burden in the Escherichia coli sepsis model. Overall, our results highlight the importance of proper mTORC2 activation for neutrophil effector functions and metabolism during sepsis.
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Affiliation(s)
| | | | | | - Mariane Tami Amano
- Instituto Sírio-Libanês de Ensino e Pesquisa, Hospital Sírio-Libanês, São Paulo, Brazil
| | - Fernanda Fernandes Terra
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Reinaldo Correia Silva
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Matheus Garcia Fragas
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Maria Fernanda Forni
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Horsley Laboratory, Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT
| | | | - Gabriela Venturini
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of São Paulo Medical School, São Paulo, Brazil
| | | | - Bruno Ghirotto
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Mario Costa Cruz
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Flávia Franco Cunha
- Nephrology Division, Laboratory of Clinical and Experimental Immunology, Federal University of São Paulo, São Paulo, Brazil
| | - Aline Ignacio
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Marcela Latância
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Angela Castoldi
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Vinícius Andrade-Oliveira
- Federal University of ABC, Natural and Human Sciences Center, São Bernardo do Campo, São Paulo, Brazil
| | - Eloisa Martins da Silva
- Nephrology Division, Laboratory of Clinical and Experimental Immunology, Federal University of São Paulo, São Paulo, Brazil
| | - Meire Ioshie Hiyane
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Alexandre da Costa Pereira
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of São Paulo Medical School, São Paulo, Brazil
| | - William Festuccia
- Department of Physiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil; and
| | - Flávia Carla Meotti
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Niels Olsen Saraiva Câmara
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil; .,Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of São Paulo Medical School, São Paulo, Brazil.,Department of Medicine, Laboratory of Renal Physiology (LIM 16), University of São Paulo, São Paulo, Brazil
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Breda LCD, Breda CNDS, de Almeida JRF, Paulo LNM, Jannuzzi GP, Menezes IDG, Albuquerque RC, Câmara NOS, Ferreira KS, de Almeida SR. Fonsecaeapedrosoi Conidia and Hyphae Activate Neutrophils Distinctly: Requirement of TLR-2 and TLR-4 in Neutrophil Effector Functions. Front Immunol 2020; 11:540064. [PMID: 33193308 PMCID: PMC7609859 DOI: 10.3389/fimmu.2020.540064] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 03/03/2020] [Accepted: 08/31/2020] [Indexed: 12/16/2022] Open
Abstract
Chromoblastomycosis is a chronic and progressive subcutaneous mycosis caused mainly by the fungus Fonsecaea pedrosoi. The infection is characterized by erythematous papules and histological sections demonstrating an external layer of fibrous tissue and an internal layer of thick granulomatous inflammatory tissue containing mainly macrophages and neutrophils. Several groups are studying the roles of the innate and adaptive immune systems in F. pedrosoi infection; however, few studies have focused on the role of neutrophils in this infection. In the current study, we verify the importance of murine neutrophils in the killing of F. pedrosoi conidia and hyphae. We demonstrate that phagocytosis and reactive oxygen species during infection with conidia are TLR-2- and TLR-4-dependent and are essential for conidial killing. Meanwhile, hyphal killing occurs by NET formation in a TLR-2-, TLR-4-, and ROS-independent manner. In vivo experiments show that TLR-2 and TLR-4 are also important in chromoblastomycosis infection. TLR-2KO and TLR-4KO animals had lower levels of CCL3 and CXCL1 chemokines and impaired neutrophil migration to the infected site. These animals also had higher fungal loads during infection with F. pedrosoi conidia, confirming that TLR-2 and TLR-4 are essential receptors for F. pedrosoi recognition and immune system activation. Therefore, this study demonstrates for the first time that neutrophil activation during F. pedrosoi is conidial or hyphal-specific with TLR-2 and TLR-4 being essential during conidial infection but unnecessary for hyphal killing by neutrophils.
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Affiliation(s)
- Leandro Carvalho Dantas Breda
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | | | - José Roberto Fogaça de Almeida
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Larissa Neves Monteiro Paulo
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Grasielle Pereira Jannuzzi
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Isabela de Godoy Menezes
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Renata Chaves Albuquerque
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Niels Olsen Saraiva Câmara
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Karen Spadari Ferreira
- Departamento de Ciências Farmacêuticas, Instituto de Ciências Naturais, Universidade Federal de São Paulo, Diadema, Brazil
| | - Sandro Rogério de Almeida
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
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Sahagún-Ruiz A, Breda LCD, Valencia MMC, Elias WP, Munthe-Fog L, Garred P, Barbosa AS, Isaac L. Studies of the binding of ficolin-2 and ficolin-3 from the complement lectin pathway to Leptospira biflexa, Pasteurella pneumotropica and Diarrheagenic Escherichia coli. Immunobiology 2015; 220:1177-85. [PMID: 26074063 DOI: 10.1016/j.imbio.2015.06.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 05/28/2015] [Accepted: 06/01/2015] [Indexed: 11/15/2022]
Abstract
Ficolins recognize pathogen associated molecular patterns and activate the lectin pathway of complement system. However, our knowledge regarding pathogen recognition of human ficolins is still limited. We therefore set out to explore and investigate the possible interactions of the two main serum ficolins, ficolin-2 and ficolin-3 with different Gram-negative bacteria. We used recombinant ficolin molecules and normal human serum, which were detected with anti-ficolin monoclonal antibodies. In addition we investigated the capacity of these pathogens to activate the lectin pathway of complement system. We show for the first time that human ficolin-2 recognizes the nonpathogenic spirochete Leptospira biflexa serovar Patoc, but not the pathogenic Leptospira interrogans serovar Kennewicki strain Fromm. Additionally, human ficolin-2 and ficolin-3 recognize pathogenic Pasteurella pneumotropica, enteropathogenic Escherichia coli (EPEC) serotype O111ab:H2 and enteroaggregative E. coli (EAEC) serogroup O71 but not four enterohemorrhagic E. coli, three EPEC, three EAEC and two nonpathogenic E. coli strains (DH5α and HB101). The lectin pathway was activated by Pasteurella pneumotropica, EPEC O111ab:H2 and EAEC O71 after incubation with C1q depleted human serum. In conclusion, this study provide novel insight in the binding and complement activating capacity of the lectin pathway initiation molecules ficolin-2 and ficolin-3 towards relevant Gram-negative pathogens of pathophysiological relevance.
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Affiliation(s)
- Alfredo Sahagún-Ruiz
- Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico
| | | | | | - Waldir P Elias
- Laboratório de Bacteriologia, Instituto Butantan, Brazil
| | - Lea Munthe-Fog
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Peter Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Lourdes Isaac
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil.
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6
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Sahagún-Ruiz A, Granados Martinez AP, Breda LCD, Fraga TR, Castiblanco Valencia MM, Barbosa AS, Isaac L. Pasteurella pneumotropica evades the human complement system by acquisition of the complement regulators factor H and C4BP. PLoS One 2014; 9:e111194. [PMID: 25347183 PMCID: PMC4210218 DOI: 10.1371/journal.pone.0111194] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 09/29/2014] [Indexed: 01/17/2023] Open
Abstract
Pasteurella pneumotropica is an opportunist Gram negative bacterium responsible for rodent pasteurellosis that affects upper respiratory, reproductive and digestive tracts of mammals. In animal care facilities the presence of P. pneumotropica causes severe to lethal infection in immunodeficient mice, being also a potential source for human contamination. Indeed, occupational exposure is one of the main causes of human infection by P. pneumotropica. The clinical presentation of the disease includes subcutaneous abscesses, respiratory tract colonization and systemic infections. Given the ability of P. pneumotropica to fully disseminate in the organism, it is quite relevant to study the role of the complement system to control the infection as well as the possible evasion mechanisms involved in bacterial survival. Here, we show for the first time that P. pneumotropica is able to survive the bactericidal activity of the human complement system. We observed that host regulatory complement C4BP and Factor H bind to the surface of P. pneumotropica, controlling the activation pathways regulating the formation and maintenance of C3-convertases. These results show that P. pneumotropica has evolved mechanisms to evade the human complement system that may increase the efficiency by which this pathogen is able to gain access to and colonize inner tissues where it may cause severe infections.
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Affiliation(s)
- Alfredo Sahagún-Ruiz
- Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | | | | | - Tatiana Rodrigues Fraga
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | | | | | - Lourdes Isaac
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
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